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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<!--[if IE]><meta http-equiv="X-UA-Compatible" content="IE=edge"><![endif]-->
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<title>Upgrading to 1.1.0</title>
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<body class="book toc2 toc-left">
<div id="header">
<div id="toc" class="toc2">
<div id="toctitle">Table of Contents</div>
<ul class="sectlevel1">
<li><a href="#_upgrading_to_1_1_0">Upgrading to 1.1.0</a></li>
<li><a href="#_building">Building</a>
<ul class="sectlevel2">
<li><a href="#_basic_compile_and_test">Basic Compile and Test</a></li>
<li><a href="#_documentation">Documentation</a></li>
<li><a href="#_working_with_the_code">Working with the code</a></li>
</ul>
</li>
<li><a href="#_contributing">Contributing</a>
<ul class="sectlevel2">
<li><a href="#_sign_the_contributor_license_agreement">Sign the Contributor License Agreement</a></li>
<li><a href="#_code_of_conduct">Code of Conduct</a></li>
<li><a href="#_code_conventions_and_housekeeping">Code Conventions and Housekeeping</a></li>
<li><a href="#_checkstyle">Checkstyle</a></li>
<li><a href="#_ide_setup">IDE setup</a></li>
</ul>
</li>
</ul>
</div>
</div>
<div id="content">
<div id="preamble">
<div class="sectionbody">
<div class="imageblock">
<div class="content">
<a class="image" href="https://gitter.im/spring-cloud/spring-cloud-security?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge"><img src="https://badges.gitter.im/Join%20Chat.svg" alt="Gitter"></a>
</div>
</div>
<div class="paragraph">
<p>Spring Cloud Security offers a set of primitives for building secure
applications and services with minimum fuss. A declarative model which
can be heavily configured externally (or centrally) lends itself to
the implementation of large systems of co-operating, remote components,
usually with a central indentity management service. It is also extremely
easy to use in a service platform like Cloud Foundry. Building on
Spring Boot and Spring Security OAuth2 we can quickly create systems that
implement common patterns like single sign on, token relay and token
exchange.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_upgrading_to_1_1_0"><a class="link" href="#_upgrading_to_1_1_0">Upgrading to 1.1.0</a></h2>
<div class="sectionbody">
<div class="paragraph">
<p>Most of the OAuth2 features moved from this project to Spring Boot 1.3, so from version 1.1 things are a little different here. Here
is a guide to the available features as they were in 1.0, but with new names and slightly new APIs.</p>
</div>
<div class="paragraph">
<p>As in 1.0, an app will activate <code>@EnableOAuth2Sso</code> if you bind provide some
following properties in the <code>Environment</code>.</p>
</div>
<div class="paragraph">
<p>You can still customize the access rules in an SSO application, but instead
of a specific callback (the old <code>OAuth2SsoConfigurer</code>) all you do now is
add <code>@EnableOAuth2Sso</code> to a <code>WebSecurityConfigurerAdapter</code>.
For example if you want the resources under "/ui/**" to be protected with OAuth2:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">@Configuration
@EnableOAuth2Sso
@EnableAutoConfiguration
protected static class TestConfiguration extends WebSecurityConfigurerAdapter {
@Override
public void match(RequestMatchers matchers) {
matchers.antMatchers("/ui/**")
.authorizeRequests().anyRequest().authenticated();
}
}</code></pre>
</div>
</div>
<div class="paragraph">
<p>In this case the rest of the application will default to the normal
Spring Boot access control for other paths (Basic authentication, or
whatever custom filters you put in place).</p>
</div>
<div class="paragraph">
<p>There is no <code>@EnableOAuth2Resource</code> annotation in Spring Cloud 1.1.
You just use the regular <code>@EnableResourceServer</code> from Spring OAuth.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_building"><a class="link" href="#_building">Building</a></h2>
<div class="sectionbody">
<div class="sect2">
<h3 id="_basic_compile_and_test"><a class="link" href="#_basic_compile_and_test">Basic Compile and Test</a></h3>
<div class="paragraph">
<p>To build the source you will need to install JDK 1.7.</p>
</div>
<div class="paragraph">
<p>Spring Cloud uses Maven for most build-related activities, and you
should be able to get off the ground quite quickly by cloning the
project you are interested in and typing</p>
</div>
<div class="listingblock">
<div class="content">
<pre>$ ./mvnw install</pre>
</div>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<i class="fa icon-note" title="Note"></i>
</td>
<td class="content">
You can also install Maven (&gt;=3.3.3) yourself and run the <code>mvn</code> command
in place of <code>./mvnw</code> in the examples below. If you do that you also
might need to add <code>-P spring</code> if your local Maven settings do not
contain repository declarations for spring pre-release artifacts.
</td>
</tr>
</table>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<i class="fa icon-note" title="Note"></i>
</td>
<td class="content">
Be aware that you might need to increase the amount of memory
available to Maven by setting a <code>MAVEN_OPTS</code> environment variable with
a value like <code>-Xmx512m -XX:MaxPermSize=128m</code>. We try to cover this in
the <code>.mvn</code> configuration, so if you find you have to do it to make a
build succeed, please raise a ticket to get the settings added to
source control.
</td>
</tr>
</table>
</div>
<div class="paragraph">
<p>For hints on how to build the project look in <code>.travis.yml</code> if there
is one. There should be a "script" and maybe "install" command. Also
look at the "services" section to see if any services need to be
running locally (e.g. mongo or rabbit). Ignore the git-related bits
that you might find in "before_install" since they&#8217;re related to setting git
credentials and you already have those.</p>
</div>
<div class="paragraph">
<p>The projects that require middleware generally include a
<code>docker-compose.yml</code>, so consider using
<a href="https://docs.docker.com/compose/">Docker Compose</a> to run the middeware servers
in Docker containers. See the README in the
<a href="https://github.com/spring-cloud-samples/scripts">scripts demo
repository</a> for specific instructions about the common cases of mongo,
rabbit and redis.</p>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<i class="fa icon-note" title="Note"></i>
</td>
<td class="content">
If all else fails, build with the command from <code>.travis.yml</code> (usually
<code>./mvnw install</code>).
</td>
</tr>
</table>
</div>
</div>
<div class="sect2">
<h3 id="_documentation"><a class="link" href="#_documentation">Documentation</a></h3>
<div class="paragraph">
<p>The spring-cloud-build module has a "docs" profile, and if you switch
that on it will try to build asciidoc sources from
<code>src/main/asciidoc</code>. As part of that process it will look for a
<code>README.adoc</code> and process it by loading all the includes, but not
parsing or rendering it, just copying it to <code>${main.basedir}</code>
(defaults to <code>${basedir}</code>, i.e. the root of the project). If there are
any changes in the README it will then show up after a Maven build as
a modified file in the correct place. Just commit it and push the change.</p>
</div>
</div>
<div class="sect2">
<h3 id="_working_with_the_code"><a class="link" href="#_working_with_the_code">Working with the code</a></h3>
<div class="paragraph">
<p>If you don&#8217;t have an IDE preference we would recommend that you use
<a href="https://www.springsource.com/developer/sts">Spring Tools Suite</a> or
<a href="https://eclipse.org">Eclipse</a> when working with the code. We use the
<a href="https://eclipse.org/m2e/">m2eclipse</a> eclipse plugin for maven support. Other IDEs and tools
should also work without issue as long as they use Maven 3.3.3 or better.</p>
</div>
<div class="sect3">
<h4 id="_importing_into_eclipse_with_m2eclipse"><a class="link" href="#_importing_into_eclipse_with_m2eclipse">Importing into eclipse with m2eclipse</a></h4>
<div class="paragraph">
<p>We recommend the <a href="https://eclipse.org/m2e/">m2eclipse</a> eclipse plugin when working with
eclipse. If you don&#8217;t already have m2eclipse installed it is available from the "eclipse
marketplace".</p>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<i class="fa icon-note" title="Note"></i>
</td>
<td class="content">
Older versions of m2e do not support Maven 3.3, so once the
projects are imported into Eclipse you will also need to tell
m2eclipse to use the right profile for the projects. If you
see many different errors related to the POMs in the projects, check
that you have an up to date installation. If you can&#8217;t upgrade m2e,
add the "spring" profile to your <code>settings.xml</code>. Alternatively you can
copy the repository settings from the "spring" profile of the parent
pom into your <code>settings.xml</code>.
</td>
</tr>
</table>
</div>
</div>
<div class="sect3">
<h4 id="_importing_into_eclipse_without_m2eclipse"><a class="link" href="#_importing_into_eclipse_without_m2eclipse">Importing into eclipse without m2eclipse</a></h4>
<div class="paragraph">
<p>If you prefer not to use m2eclipse you can generate eclipse project metadata using the
following command:</p>
</div>
<div class="listingblock">
<div class="content">
<pre>$ ./mvnw eclipse:eclipse</pre>
</div>
</div>
<div class="paragraph">
<p>The generated eclipse projects can be imported by selecting <code>import existing projects</code>
from the <code>file</code> menu.</p>
</div>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_contributing"><a class="link" href="#_contributing">Contributing</a></h2>
<div class="sectionbody">
<div class="paragraph">
<p>Spring Cloud is released under the non-restrictive Apache 2.0 license,
and follows a very standard Github development process, using Github
tracker for issues and merging pull requests into master. If you want
to contribute even something trivial please do not hesitate, but
follow the guidelines below.</p>
</div>
<div class="sect2">
<h3 id="_sign_the_contributor_license_agreement"><a class="link" href="#_sign_the_contributor_license_agreement">Sign the Contributor License Agreement</a></h3>
<div class="paragraph">
<p>Before we accept a non-trivial patch or pull request we will need you to sign the
<a href="https://cla.pivotal.io/sign/spring">Contributor License Agreement</a>.
Signing the contributor&#8217;s agreement does not grant anyone commit rights to the main
repository, but it does mean that we can accept your contributions, and you will get an
author credit if we do. Active contributors might be asked to join the core team, and
given the ability to merge pull requests.</p>
</div>
</div>
<div class="sect2">
<h3 id="_code_of_conduct"><a class="link" href="#_code_of_conduct">Code of Conduct</a></h3>
<div class="paragraph">
<p>This project adheres to the Contributor Covenant <a href="https://github.com/spring-cloud/spring-cloud-build/blob/master/docs/src/main/asciidoc/code-of-conduct.adoc">code of
conduct</a>. By participating, you are expected to uphold this code. Please report
unacceptable behavior to <a href="mailto:spring-code-of-conduct@pivotal.io">spring-code-of-conduct@pivotal.io</a>.</p>
</div>
</div>
<div class="sect2">
<h3 id="_code_conventions_and_housekeeping"><a class="link" href="#_code_conventions_and_housekeeping">Code Conventions and Housekeeping</a></h3>
<div class="paragraph">
<p>None of these is essential for a pull request, but they will all help. They can also be
added after the original pull request but before a merge.</p>
</div>
<div class="ulist">
<ul>
<li>
<p>Use the Spring Framework code format conventions. If you use Eclipse
you can import formatter settings using the
<code>eclipse-code-formatter.xml</code> file from the
<a href="https://raw.githubusercontent.com/spring-cloud/spring-cloud-build/master/spring-cloud-dependencies-parent/eclipse-code-formatter.xml">Spring
Cloud Build</a> project. If using IntelliJ, you can use the
<a href="https://plugins.jetbrains.com/plugin/6546">Eclipse Code Formatter
Plugin</a> to import the same file.</p>
</li>
<li>
<p>Make sure all new <code>.java</code> files to have a simple Javadoc class comment with at least an
<code>@author</code> tag identifying you, and preferably at least a paragraph on what the class is
for.</p>
</li>
<li>
<p>Add the ASF license header comment to all new <code>.java</code> files (copy from existing files
in the project)</p>
</li>
<li>
<p>Add yourself as an <code>@author</code> to the .java files that you modify substantially (more
than cosmetic changes).</p>
</li>
<li>
<p>Add some Javadocs and, if you change the namespace, some XSD doc elements.</p>
</li>
<li>
<p>A few unit tests would help a lot as well&#8201;&#8212;&#8201;someone has to do it.</p>
</li>
<li>
<p>If no-one else is using your branch, please rebase it against the current master (or
other target branch in the main project).</p>
</li>
<li>
<p>When writing a commit message please follow <a href="https://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html">these conventions</a>,
if you are fixing an existing issue please add <code>Fixes gh-XXXX</code> at the end of the commit
message (where XXXX is the issue number).</p>
</li>
</ul>
</div>
</div>
<div class="sect2">
<h3 id="_checkstyle"><a class="link" href="#_checkstyle">Checkstyle</a></h3>
<div class="paragraph">
<p>Spring Cloud Build comes with a set of checkstyle rules. You can find them in the <code>spring-cloud-build-tools</code> module. The most notable files under the module are:</p>
</div>
<div class="listingblock">
<div class="title">spring-cloud-build-tools/</div>
<div class="content">
<pre>└── src
   ├── checkstyle
   │   └── checkstyle-suppressions.xml <i class="conum" data-value="3"></i><b>(3)</b>
   └── main
   └── resources
   ├── checkstyle-header.txt <i class="conum" data-value="2"></i><b>(2)</b>
   └── checkstyle.xml <i class="conum" data-value="1"></i><b>(1)</b></pre>
</div>
</div>
<div class="colist arabic">
<table>
<tr>
<td><i class="conum" data-value="1"></i><b>1</b></td>
<td>Default Checkstyle rules</td>
</tr>
<tr>
<td><i class="conum" data-value="2"></i><b>2</b></td>
<td>File header setup</td>
</tr>
<tr>
<td><i class="conum" data-value="3"></i><b>3</b></td>
<td>Default suppression rules</td>
</tr>
</table>
</div>
<div class="sect3">
<h4 id="_checkstyle_configuration"><a class="link" href="#_checkstyle_configuration">Checkstyle configuration</a></h4>
<div class="paragraph">
<p>Checkstyle rules are <strong>disabled by default</strong>. To add checkstyle to your project just define the following properties and plugins.</p>
</div>
<div class="listingblock">
<div class="title">pom.xml</div>
<div class="content">
<pre>&lt;properties&gt;
&lt;maven-checkstyle-plugin.failsOnError&gt;true&lt;/maven-checkstyle-plugin.failsOnError&gt; <i class="conum" data-value="1"></i><b>(1)</b>
&lt;maven-checkstyle-plugin.failsOnViolation&gt;true
&lt;/maven-checkstyle-plugin.failsOnViolation&gt; <i class="conum" data-value="2"></i><b>(2)</b>
&lt;maven-checkstyle-plugin.includeTestSourceDirectory&gt;true
&lt;/maven-checkstyle-plugin.includeTestSourceDirectory&gt; <i class="conum" data-value="3"></i><b>(3)</b>
&lt;/properties&gt;
&lt;build&gt;
&lt;plugins&gt;
&lt;plugin&gt; <i class="conum" data-value="4"></i><b>(4)</b>
&lt;groupId&gt;io.spring.javaformat&lt;/groupId&gt;
&lt;artifactId&gt;spring-javaformat-maven-plugin&lt;/artifactId&gt;
&lt;/plugin&gt;
&lt;plugin&gt; <i class="conum" data-value="5"></i><b>(5)</b>
&lt;groupId&gt;org.apache.maven.plugins&lt;/groupId&gt;
&lt;artifactId&gt;maven-checkstyle-plugin&lt;/artifactId&gt;
&lt;/plugin&gt;
&lt;/plugins&gt;
&lt;reporting&gt;
&lt;plugins&gt;
&lt;plugin&gt; <i class="conum" data-value="5"></i><b>(5)</b>
&lt;groupId&gt;org.apache.maven.plugins&lt;/groupId&gt;
&lt;artifactId&gt;maven-checkstyle-plugin&lt;/artifactId&gt;
&lt;/plugin&gt;
&lt;/plugins&gt;
&lt;/reporting&gt;
&lt;/build&gt;</pre>
</div>
</div>
<div class="colist arabic">
<table>
<tr>
<td><i class="conum" data-value="1"></i><b>1</b></td>
<td>Fails the build upon Checkstyle errors</td>
</tr>
<tr>
<td><i class="conum" data-value="2"></i><b>2</b></td>
<td>Fails the build upon Checkstyle violations</td>
</tr>
<tr>
<td><i class="conum" data-value="3"></i><b>3</b></td>
<td>Checkstyle analyzes also the test sources</td>
</tr>
<tr>
<td><i class="conum" data-value="4"></i><b>4</b></td>
<td>Add the Spring Java Format plugin that will reformat your code to pass most of the Checkstyle formatting rules</td>
</tr>
<tr>
<td><i class="conum" data-value="5"></i><b>5</b></td>
<td>Add checkstyle plugin to your build and reporting phases</td>
</tr>
</table>
</div>
<div class="paragraph">
<p>If you need to suppress some rules (e.g. line length needs to be longer), then it&#8217;s enough for you to define a file under <code>${project.root}/src/checkstyle/checkstyle-suppressions.xml</code> with your suppressions. Example:</p>
</div>
<div class="listingblock">
<div class="title">projectRoot/src/checkstyle/checkstyle-suppresions.xml</div>
<div class="content">
<pre>&lt;?xml version="1.0"?&gt;
&lt;!DOCTYPE suppressions PUBLIC
"-//Puppy Crawl//DTD Suppressions 1.1//EN"
"https://www.puppycrawl.com/dtds/suppressions_1_1.dtd"&gt;
&lt;suppressions&gt;
&lt;suppress files=".*ConfigServerApplication\.java" checks="HideUtilityClassConstructor"/&gt;
&lt;suppress files=".*ConfigClientWatch\.java" checks="LineLengthCheck"/&gt;
&lt;/suppressions&gt;</pre>
</div>
</div>
<div class="paragraph">
<p>It&#8217;s advisable to copy the <code>${spring-cloud-build.rootFolder}/.editorconfig</code> and <code>${spring-cloud-build.rootFolder}/.springformat</code> to your project. That way, some default formatting rules will be applied. You can do so by running this script:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-bash hljs" data-lang="bash">$ curl https://raw.githubusercontent.com/spring-cloud/spring-cloud-build/master/.editorconfig -o .editorconfig
$ touch .springformat</code></pre>
</div>
</div>
</div>
</div>
<div class="sect2">
<h3 id="_ide_setup"><a class="link" href="#_ide_setup">IDE setup</a></h3>
<div class="sect3">
<h4 id="_intellij_idea"><a class="link" href="#_intellij_idea">Intellij IDEA</a></h4>
<div class="paragraph">
<p>In order to setup Intellij you should import our coding conventions, inspection profiles and set up the checkstyle plugin.
The following files can be found in the <a href="https://github.com/spring-cloud/spring-cloud-build/tree/master/spring-cloud-build-tools">Spring Cloud Build</a> project.</p>
</div>
<div class="listingblock">
<div class="title">spring-cloud-build-tools/</div>
<div class="content">
<pre>└── src
   ├── checkstyle
   │   └── checkstyle-suppressions.xml <i class="conum" data-value="3"></i><b>(3)</b>
   └── main
   └── resources
   ├── checkstyle-header.txt <i class="conum" data-value="2"></i><b>(2)</b>
   ├── checkstyle.xml <i class="conum" data-value="1"></i><b>(1)</b>
   └── intellij
      ├── Intellij_Project_Defaults.xml <i class="conum" data-value="4"></i><b>(4)</b>
      └── Intellij_Spring_Boot_Java_Conventions.xml <i class="conum" data-value="5"></i><b>(5)</b></pre>
</div>
</div>
<div class="colist arabic">
<table>
<tr>
<td><i class="conum" data-value="1"></i><b>1</b></td>
<td>Default Checkstyle rules</td>
</tr>
<tr>
<td><i class="conum" data-value="2"></i><b>2</b></td>
<td>File header setup</td>
</tr>
<tr>
<td><i class="conum" data-value="3"></i><b>3</b></td>
<td>Default suppression rules</td>
</tr>
<tr>
<td><i class="conum" data-value="4"></i><b>4</b></td>
<td>Project defaults for Intellij that apply most of Checkstyle rules</td>
</tr>
<tr>
<td><i class="conum" data-value="5"></i><b>5</b></td>
<td>Project style conventions for Intellij that apply most of Checkstyle rules</td>
</tr>
</table>
</div>
<div class="imageblock">
<div class="content">
<img src="https://raw.githubusercontent.com/spring-cloud/spring-cloud-build/master/docs/src/main/asciidoc/images/intellij-code-style.png" alt="Code style">
</div>
<div class="title">Figure 1. Code style</div>
</div>
<div class="paragraph">
<p>Go to <code>File</code> &#8594; <code>Settings</code> &#8594; <code>Editor</code> &#8594; <code>Code style</code>. There click on the icon next to the <code>Scheme</code> section. There, click on the <code>Import Scheme</code> value and pick the <code>Intellij IDEA code style XML</code> option. Import the <code>spring-cloud-build-tools/src/main/resources/intellij/Intellij_Spring_Boot_Java_Conventions.xml</code> file.</p>
</div>
<div class="imageblock">
<div class="content">
<img src="https://raw.githubusercontent.com/spring-cloud/spring-cloud-build/master/docs/src/main/asciidoc/images/intellij-inspections.png" alt="Code style">
</div>
<div class="title">Figure 2. Inspection profiles</div>
</div>
<div class="paragraph">
<p>Go to <code>File</code> &#8594; <code>Settings</code> &#8594; <code>Editor</code> &#8594; <code>Inspections</code>. There click on the icon next to the <code>Profile</code> section. There, click on the <code>Import Profile</code> and import the <code>spring-cloud-build-tools/src/main/resources/intellij/Intellij_Project_Defaults.xml</code> file.</p>
</div>
<div class="paragraph">
<div class="title">Checkstyle</div>
<p>To have Intellij work with Checkstyle, you have to install the <code>Checkstyle</code> plugin. It&#8217;s advisable to also install the <code>Assertions2Assertj</code> to automatically convert the JUnit assertions</p>
</div>
<div class="imageblock">
<div class="content">
<img src="https://raw.githubusercontent.com/spring-cloud/spring-cloud-build/master/docs/src/main/asciidoc/images/intellij-checkstyle.png" alt="Checkstyle">
</div>
</div>
<div class="paragraph">
<p>Go to <code>File</code> &#8594; <code>Settings</code> &#8594; <code>Other settings</code> &#8594; <code>Checkstyle</code>. There click on the <code>+</code> icon in the <code>Configuration file</code> section. There, you&#8217;ll have to define where the checkstyle rules should be picked from. In the image above, we&#8217;ve picked the rules from the cloned Spring Cloud Build repository. However, you can point to the Spring Cloud Build&#8217;s GitHub repository (e.g. for the <code>checkstyle.xml</code> : <code><a href="https://raw.githubusercontent.com/spring-cloud/spring-cloud-build/master/spring-cloud-build-tools/src/main/resources/checkstyle.xml" class="bare">https://raw.githubusercontent.com/spring-cloud/spring-cloud-build/master/spring-cloud-build-tools/src/main/resources/checkstyle.xml</a></code>). We need to provide the following variables:</p>
</div>
<div class="ulist">
<ul>
<li>
<p><code>checkstyle.header.file</code> - please point it to the Spring Cloud Build&#8217;s, <code>spring-cloud-build-tools/src/main/resources/checkstyle-header.txt</code> file either in your cloned repo or via the <code><a href="https://raw.githubusercontent.com/spring-cloud/spring-cloud-build/master/spring-cloud-build-tools/src/main/resources/checkstyle-header.txt" class="bare">https://raw.githubusercontent.com/spring-cloud/spring-cloud-build/master/spring-cloud-build-tools/src/main/resources/checkstyle-header.txt</a></code> URL.</p>
</li>
<li>
<p><code>checkstyle.suppressions.file</code> - default suppressions. Please point it to the Spring Cloud Build&#8217;s, <code>spring-cloud-build-tools/src/checkstyle/checkstyle-suppressions.xml</code> file either in your cloned repo or via the <code><a href="https://raw.githubusercontent.com/spring-cloud/spring-cloud-build/master/spring-cloud-build-tools/src/checkstyle/checkstyle-suppressions.xml" class="bare">https://raw.githubusercontent.com/spring-cloud/spring-cloud-build/master/spring-cloud-build-tools/src/checkstyle/checkstyle-suppressions.xml</a></code> URL.</p>
</li>
<li>
<p><code>checkstyle.additional.suppressions.file</code> - this variable corresponds to suppressions in your local project. E.g. you&#8217;re working on <code>spring-cloud-contract</code>. Then point to the <code>project-root/src/checkstyle/checkstyle-suppressions.xml</code> folder. Example for <code>spring-cloud-contract</code> would be: <code>/home/username/spring-cloud-contract/src/checkstyle/checkstyle-suppressions.xml</code>.</p>
</li>
</ul>
</div>
<div class="admonitionblock important">
<table>
<tr>
<td class="icon">
<i class="fa icon-important" title="Important"></i>
</td>
<td class="content">
Remember to set the <code>Scan Scope</code> to <code>All sources</code> since we apply checkstyle rules for production and test sources.
</td>
</tr>
</table>
</div>
</div>
</div>
</div>
</div>
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<body class="book toc2 toc-left">
<div id="header">
<div id="toc" class="toc2">
<div id="toctitle">Table of Contents</div>
<ul class="sectlevel2">
<li><a href="#_certificate_based_security_x509">Certificate Based Security (X509)</a></li>
<li><a href="#_kerberos">Kerberos</a></li>
<li><a href="#_oauth2_bearer_token">OAuth2 Bearer Token</a></li>
<li><a href="#_http_basic_security">HTTP Basic Security</a></li>
</ul>
</div>
</div>
<div id="content">
<div id="preamble">
<div class="sectionbody">
<div class="paragraph">
<p>In a real system (not a demo) the Config Server should be able to
authenticate clients that want to use the property source resources.</p>
</div>
</div>
</div>
<div class="sect2">
<h3 id="_certificate_based_security_x509"><a class="link" href="#_certificate_based_security_x509">Certificate Based Security (X509)</a></h3>
<div class="paragraph">
<p>If clients can communicate with the Config Server directly over HTTPS,
then they can authenticate through a certificate. This requires the
certificate to be installed in the client (could be a shared keystore
file), and to be readable (usually requires a password). If the Config
Server only accepts HTTP connections (like in Cloud Foundry) it&#8217;s a
challenge because then the front-end router has to have the
certificate processing and header population, and you probably want it
to be different in different environments (e.g. production vs. test).</p>
</div>
</div>
<div class="sect2">
<h3 id="_kerberos"><a class="link" href="#_kerberos">Kerberos</a></h3>
<div class="paragraph">
<p>If the client apps can be kerberized (the user they run as is trusted
by a Kerberos server), then they might be able to authenticate with
the server with minimal changes to the clients. That should be a
winning strategy in a lot of environments, but currently not really
very convenient in Cloud Foundry. The server has to be kerberized as
well, which is a tightly controlled process, but could be arranged
given that it can be given network access to a Kerberos installation
somewhere. The hardest thing to achieve (e.g. in a PaaS) might be a
reverse-resolvable hostname (but if you control the Kerberos
installation you can switch off that requirement).</p>
</div>
<div class="paragraph">
<p>TBD: Kerberos client (how do you do <code>RestTemplate</code> for the current
UN*X user?). Theoretically it&#8217;s possible, but not supported yet in
Spring Kerberos.</p>
</div>
</div>
<div class="sect2">
<h3 id="_oauth2_bearer_token"><a class="link" href="#_oauth2_bearer_token">OAuth2 Bearer Token</a></h3>
<div class="paragraph">
<p>OAuth2 bearer tokens are a standard way for computers to authenticate
with one another. This is a valuable option for the Spring Cloud
Config Client if it happens to be running in an environment where
OAuth2 tokens are relatively easy to come by (e.g. if we had an OAuth2
service for client credentials in Cloud Foundry).</p>
</div>
</div>
<div class="sect2">
<h3 id="_http_basic_security"><a class="link" href="#_http_basic_security">HTTP Basic Security</a></h3>
<div class="paragraph">
<p>The simplest thing that could possibly work would be HTTP Basic
security, and Spring Boot already does that for free with almost no
hassle on the server (really just a question of setting
<code>security.user.password</code>). The problem then becomes how to keep the
password safe and have it distributed to clients. So what are the
options? The password is stored in a client via
<code>ConfigSecurityProperties</code> with a property "password". The password
can be set using an external config property
<code>config.security.password</code>, or it can be set using a more elaborate
scheme if that turns out to be desirable.</p>
</div>
<div class="paragraph">
<p>Desirable features of whatever scheme we choose to protect the
password:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>Apps can still be developed and deployed in a non-production
environment without jumping through too many hoops or repeating
configuration too much.</p>
</li>
<li>
<p>Deploying into production should not require a lot of extra steps or
repetitive tasks for operations people or automation agents.</p>
</li>
<li>
<p>Whatever scheme or schemes we provide there has to be something that
works well in a PaaS environment (Cloud Foundry in particular).</p>
</li>
<li>
<p>Secrets can be changed if compromised. Ideally all client apps would
be able to refresh without a restart, e.g. using a Spring Cloud Bus
signal, assuming they might need the Config Server in between
restarts.</p>
</li>
</ul>
</div>
<div class="sect3">
<h4 id="_configuration_file"><a class="link" href="#_configuration_file">Configuration File</a></h4>
<div class="paragraph">
<p>A configuration file can have the password in plain text as long as
only apps (or config admin users) can read it. The problem is reduced
to how to protect the configuration file, and there are several
options.</p>
</div>
<div class="ulist">
<ul>
<li>
<p>UN*X file permissions. Client apps all have access to a filesystem
resource that is protected by UN*X permissions. E.g. apps run as the
"app" user, and the config file belongs to the "config" user (in the
same group as the app user), with group read permissions (640). This
is pretty robust and if there is a shared file system with proper then
the password can be changed easily in a single place. Doesn&#8217;t work
very well in a PaaS unless you can fabricate a shared filesystem from
somewhere, and that isn&#8217;t easy if you fold in the requirement for file
permissions.</p>
</li>
<li>
<p>HTTP(S) server (or any URL resource). Doesn&#8217;t really solve the
problem on its own since you need to secure access to the file server
for the same reasons you need to secure the Config Server. At best you
might have a generic solution already in place in a given production
environment (e.g. kerberized authentication) that cannot be easily
duplicated in the Config Server. In that case it works pretty well.</p>
</li>
</ul>
</div>
</div>
<div class="sect3">
<h4 id="_environment_variables"><a class="link" href="#_environment_variables">Environment Variables</a></h4>
<div class="paragraph">
<p>Every client app has to be started with an environment variable for
the password (e.g. <code>CONFIG_SECURITY_PASSWORD</code>). This can be made
relatively secure since presumably only a privileged user can start an
app. It can be a pain to set up, unless there is a platform for
deploying apps that can be configured to set the environment
variable. You could do that (for instance) with a CI system deploying
to a PaaS, and then the security is all in the CI server. Also, if you
want to change the password, you have to restart all the app instances
(since an environment variable is baked into the process).</p>
</div>
</div>
<div class="sect3">
<h4 id="_cloud_foundry_service_binding"><a class="link" href="#_cloud_foundry_service_binding">Cloud Foundry Service Binding</a></h4>
<div class="paragraph">
<p>A special case of environment variables is credentials from a Cloud
Foundry service, since they are embedded in a JSON object that is an
environment variable. Apps in Cloud Foundry already benefit (a bit)
from binding to a Config Server service (they get the base URL), but
if the credentials also (optionally) contained a password, that would
be more valuable. Using a Spring Cloud Connector we might even be able
to reduce the level of involvement for both users and operators. It
would really be a sweet spot if the Config Server itself didn&#8217;t have
to configure its own password (say it was generated randomly), but
it was still transmitted to client apps as credentials.</p>
</div>
</div>
<div class="sect3">
<h4 id="_config_server"><a class="link" href="#_config_server">Config Server</a></h4>
<div class="paragraph">
<p>The Config Server itself could be enhanced to be able to reveal its
own secret to trusted parties. How is this any better than just being
insecure (trust everyone)? It&#8217;s a question of who you trust, and how
flexible you want to be about changing the secret. For instance you
might be prepared to trust anyone who can prove that they own an IP
address in the same subnet as the Config Server, or an app deployed in
a particular space ID in a Cloud Foundry instance.</p>
</div>
<div class="paragraph">
<p>Example flow:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>Config Server exposes a <code>/password</code> endpoint</p>
</li>
<li>
<p>Client POSTs to <code>/password</code> with a body containing data (or hashes
of data) that it can derive from its environment (like a space ID, an
IP address, or a hostname, or some combination of those)</p>
</li>
<li>
<p>Server verifies the data (e.g. by pinging an endpoint on the Client
and getting a successful response, or looking up a space ID in a
database)</p>
</li>
<li>
<p>Server returns password in body of response (or 403 if the request
cannot be validated)</p>
</li>
</ul>
</div>
<div class="paragraph">
<p>(There is an assumption that doing this once in return for a password,
is better than having to do it for all the endpoints in the Config
Server.)</p>
</div>
<div class="paragraph">
<p>To make it (optionally) more secure the server could XOR the password
with the value of a shared secret (e.g. shared by environment
variables amongst all apps). This <strong>is</strong> actually better than just
sharing the password using an environment variable because the server
gets to do the extra computations on the data provided by the client.</p>
</div>
</div>
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<body class="book toc2 toc-left">
<div id="header">
<h1>Spring Cloud Security</h1>
<div id="toc" class="toc2">
<div id="toctitle">Table of Contents</div>
<ul class="sectlevel1">
<li><a href="#_quickstart">Quickstart</a>
<ul class="sectlevel2">
<li><a href="#_oauth2_single_sign_on">OAuth2 Single Sign On</a></li>
<li><a href="#_oauth2_protected_resource">OAuth2 Protected Resource</a></li>
</ul>
</li>
<li><a href="#_more_detail">More Detail</a>
<ul class="sectlevel2">
<li><a href="#_single_sign_on">Single Sign On</a></li>
<li><a href="#_token_relay">Token Relay</a></li>
</ul>
</li>
<li><a href="#_configuring_authentication_downstream_of_a_zuul_proxy">Configuring Authentication Downstream of a Zuul Proxy</a></li>
</ul>
</div>
</div>
<div id="content">
<div id="preamble">
<div class="sectionbody">
<div class="paragraph">
<p>Spring Cloud Security offers a set of primitives for building secure
applications and services with minimum fuss. A declarative model which
can be heavily configured externally (or centrally) lends itself to
the implementation of large systems of co-operating, remote components,
usually with a central indentity management service. It is also extremely
easy to use in a service platform like Cloud Foundry. Building on
Spring Boot and Spring Security OAuth2 we can quickly create systems that
implement common patterns like single sign on, token relay and token
exchange.</p>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<i class="fa icon-note" title="Note"></i>
</td>
<td class="content">
Spring Cloud is released under the non-restrictive Apache 2.0 license. If you would like to contribute to this section of the documentation or if you find an error, please find the source code and issue trackers in the project at <a href="https://github.com/spring-cloud/spring-cloud-security/tree/master/src/main/asciidoc">github</a>.
</td>
</tr>
</table>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_quickstart"><a class="link" href="#_quickstart">Quickstart</a></h2>
<div class="sectionbody">
<div class="sect2">
<h3 id="_oauth2_single_sign_on"><a class="link" href="#_oauth2_single_sign_on">OAuth2 Single Sign On</a></h3>
<div class="paragraph">
<p>Here&#8217;s a Spring Cloud "Hello World" app with HTTP Basic
authentication and a single user account:</p>
</div>
<div class="listingblock">
<div class="title">app.groovy</div>
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">@Grab('spring-boot-starter-security')
@Controller
class Application {
@RequestMapping('/')
String home() {
'Hello World'
}
}</code></pre>
</div>
</div>
<div class="paragraph">
<p>You can run it with <code>spring run app.groovy</code> and watch the logs for the password (username is "user"). So far this is just the default for a Spring Boot app.</p>
</div>
<div class="paragraph">
<p>Here&#8217;s a Spring Cloud app with OAuth2 SSO:</p>
</div>
<div class="listingblock">
<div class="title">app.groovy</div>
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">@Controller
@EnableOAuth2Sso
class Application {
@RequestMapping('/')
String home() {
'Hello World'
}
}</code></pre>
</div>
</div>
<div class="paragraph">
<p>Spot the difference? This app will actually behave exactly the same as
the previous one, because it doesn&#8217;t know it&#8217;s OAuth2 credentals
yet.</p>
</div>
<div class="paragraph">
<p>You can register an app in github quite easily, so try that if you
want a production app on your own domain. If you are happy to test on
localhost:8080, then set up these properties in your application
configuration:</p>
</div>
<div class="listingblock">
<div class="title">application.yml</div>
<div class="content">
<pre class="highlightjs highlight"><code class="language-yaml hljs" data-lang="yaml">security:
oauth2:
client:
clientId: bd1c0a783ccdd1c9b9e4
clientSecret: 1a9030fbca47a5b2c28e92f19050bb77824b5ad1
accessTokenUri: https://github.com/login/oauth/access_token
userAuthorizationUri: https://github.com/login/oauth/authorize
clientAuthenticationScheme: form
resource:
userInfoUri: https://api.github.com/user
preferTokenInfo: false</code></pre>
</div>
</div>
<div class="paragraph">
<p>run the app above and it will redirect to github for authorization. If
you are already signed into github you won&#8217;t even notice that it has
authenticated. These credentials will only work if your app is
running on port 8080.</p>
</div>
<div class="paragraph">
<p>To limit the scope that the client asks for when it obtains an access token
you can set <code>security.oauth2.client.scope</code> (comma separated or an array in YAML). By
default the scope is empty and it is up to to Authorization Server to
decide what the defaults should be, usually depending on the settings in
the client registration that it holds.</p>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<i class="fa icon-note" title="Note"></i>
</td>
<td class="content">
The examples above are all Groovy scripts. If you want to write the
same code in Java (or Groovy) you need to add Spring Security OAuth2
to the classpath (e.g. see the
<a href="https://github.com/spring-cloud-samples/sso">sample here</a>).
</td>
</tr>
</table>
</div>
</div>
<div class="sect2">
<h3 id="_oauth2_protected_resource"><a class="link" href="#_oauth2_protected_resource">OAuth2 Protected Resource</a></h3>
<div class="paragraph">
<p>You want to protect an API resource with an OAuth2 token? Here&#8217;s a
simple example (paired with the client above):</p>
</div>
<div class="listingblock">
<div class="title">app.groovy</div>
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">@Grab('spring-cloud-starter-security')
@RestController
@EnableResourceServer
class Application {
@RequestMapping('/')
def home() {
[message: 'Hello World']
}
}</code></pre>
</div>
</div>
<div class="paragraph">
<p>and</p>
</div>
<div class="listingblock">
<div class="title">application.yml</div>
<div class="content">
<pre class="highlightjs highlight"><code class="language-yaml hljs" data-lang="yaml">security:
oauth2:
resource:
userInfoUri: https://api.github.com/user
preferTokenInfo: false</code></pre>
</div>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_more_detail"><a class="link" href="#_more_detail">More Detail</a></h2>
<div class="sectionbody">
<div class="sect2">
<h3 id="_single_sign_on"><a class="link" href="#_single_sign_on">Single Sign On</a></h3>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<i class="fa icon-note" title="Note"></i>
</td>
<td class="content">
All of the OAuth2 SSO and resource server features moved to Spring Boot
in version 1.3. You can find documentation in the
<a href="https://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/">Spring Boot user guide</a>.
</td>
</tr>
</table>
</div>
</div>
<div class="sect2">
<h3 id="_token_relay"><a class="link" href="#_token_relay">Token Relay</a></h3>
<div class="paragraph">
<p>A Token Relay is where an OAuth2 consumer acts as a Client and
forwards the incoming token to outgoing resource requests. The
consumer can be a pure Client (like an SSO application) or a Resource
Server.</p>
</div>
<div class="sect3">
<h4 id="_client_token_relay_in_spring_cloud_gateway"><a class="link" href="#_client_token_relay_in_spring_cloud_gateway">Client Token Relay in Spring Cloud Gateway</a></h4>
<div class="paragraph">
<p>If your app also has a
<a href="https://cloud.spring.io/spring-cloud-static/current/single/spring-cloud.html#_spring_cloud_gateway">Spring
Cloud Gateway</a> embedded reverse proxy then you
can ask it to forward OAuth2 access tokens downstream to the services
it is proxying. Thus the SSO app above can be enhanced simply like
this:</p>
</div>
<div class="listingblock">
<div class="title">App.java</div>
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">@Autowired
private TokenRelayGatewayFilterFactory filterFactory;
@Bean
public RouteLocator customRouteLocator(RouteLocatorBuilder builder) {
return builder.routes()
.route("resource", r -&gt; r.path("/resource")
.filters(f -&gt; f.filter(filterFactory.apply()))
.uri("http://localhost:9000"))
.build();
}</code></pre>
</div>
</div>
<div class="paragraph">
<p>or this</p>
</div>
<div class="listingblock">
<div class="title">application.yaml</div>
<div class="content">
<pre class="highlightjs highlight"><code class="language-yaml hljs" data-lang="yaml">spring:
cloud:
gateway:
routes:
- id: resource
uri: http://localhost:9000
predicates:
- Path=/resource
filters:
- TokenRelay=</code></pre>
</div>
</div>
<div class="paragraph">
<p>and it will (in addition to logging the user in and grabbing a token)
pass the authentication token downstream to the services (in this case
<code>/resource</code>).</p>
</div>
<div class="paragraph">
<p>To enable this for Spring Cloud Gateway add the following dependencies</p>
</div>
<div class="ulist">
<ul>
<li>
<p><code>org.springframework.boot:spring-boot-starter-oauth2-client</code></p>
</li>
<li>
<p><code>org.springframework.cloud:spring-cloud-starter-security</code></p>
</li>
</ul>
</div>
<div class="paragraph">
<p>How does it work? The
<a href="https://github.com/spring-cloud/spring-cloud-security/tree/master/src/main/java/org/springframework/cloud/security/oauth2/gateway/TokenRelayGatewayFilterFactory.java">filter</a>
extracts an access token from the currently authenticated user,
and puts it in a request header for the downstream requests.</p>
</div>
<div class="paragraph">
<p>For a full working sample see <a href="https://github.com/spring-cloud-samples/sample-gateway-oauth2login">this project</a>.</p>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<i class="fa icon-note" title="Note"></i>
</td>
<td class="content">
The default implementation of <code>ReactiveOAuth2AuthorizedClientService</code> used by <code>TokenRelayGatewayFilterFactory</code>
uses an in-memory data store. You will need to provide your own implementation <code>ReactiveOAuth2AuthorizedClientService</code>
if you need a more robust solution.
</td>
</tr>
</table>
</div>
</div>
<div class="sect3">
<h4 id="_client_token_relay"><a class="link" href="#_client_token_relay">Client Token Relay</a></h4>
<div class="paragraph">
<p>If your app is a user facing OAuth2 client (i.e. has declared
<code>@EnableOAuth2Sso</code> or <code>@EnableOAuth2Client</code>) then it has an
<code>OAuth2ClientContext</code> in request scope from Spring Boot. You can
create your own <code>OAuth2RestTemplate</code> from this context and an
autowired <code>OAuth2ProtectedResourceDetails</code>, and then the context will
always forward the access token downstream, also refreshing the access
token automatically if it expires. (These are features of Spring
Security and Spring Boot.)</p>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<i class="fa icon-note" title="Note"></i>
</td>
<td class="content">
Spring Boot (1.4.1) does not create an
<code>OAuth2ProtectedResourceDetails</code> automatically if you are using
<code>client_credentials</code> tokens. In that case you need to create your own
<code>ClientCredentialsResourceDetails</code> and configure it with
<code>@ConfigurationProperties("security.oauth2.client")</code>.
</td>
</tr>
</table>
</div>
</div>
<div class="sect3">
<h4 id="_client_token_relay_in_zuul_proxy"><a class="link" href="#_client_token_relay_in_zuul_proxy">Client Token Relay in Zuul Proxy</a></h4>
<div class="paragraph">
<p>If your app also has a
<a href="https://cloud.spring.io/spring-cloud.html#netflix-zuul-reverse-proxy">Spring
Cloud Zuul</a> embedded reverse proxy (using <code>@EnableZuulProxy</code>) then you
can ask it to forward OAuth2 access tokens downstream to the services
it is proxying. Thus the SSO app above can be enhanced simply like
this:</p>
</div>
<div class="listingblock">
<div class="title">app.groovy</div>
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">@Controller
@EnableOAuth2Sso
@EnableZuulProxy
class Application {
}</code></pre>
</div>
</div>
<div class="paragraph">
<p>and it will (in addition to logging the user in and grabbing a token)
pass the authentication token downstream to the <code>/proxy/*</code>
services. If those services are implemented with
<code>@EnableResourceServer</code> then they will get a valid token in the
correct header.</p>
</div>
<div class="paragraph">
<p>How does it work? The <code>@EnableOAuth2Sso</code> annotation pulls in
<code>spring-cloud-starter-security</code> (which you could do manually in a
traditional app), and that in turn triggers some autoconfiguration for
a <code>ZuulFilter</code>, which itself is activated because Zuul is on the
classpath (via <code>@EnableZuulProxy</code>). The
<a href="https://github.com/spring-cloud/spring-cloud-security/tree/master/src/main/java/org/springframework/cloud/security/oauth2/proxy/OAuth2TokenRelayFilter.java">filter</a>
just extracts an access token from the currently authenticated user,
and puts it in a request header for the downstream requests.</p>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<i class="fa icon-note" title="Note"></i>
</td>
<td class="content">
Spring Boot does not create an <code>OAuth2RestOperations</code> automatically which is needed for <code>refresh_token</code>. In that case you need to create your own
<code>OAuth2RestOperations</code> so <code>OAuth2TokenRelayFilter</code> can refresh the token if needed.
</td>
</tr>
</table>
</div>
</div>
<div class="sect3">
<h4 id="_resource_server_token_relay"><a class="link" href="#_resource_server_token_relay">Resource Server Token Relay</a></h4>
<div class="paragraph">
<p>If your app has <code>@EnableResourceServer</code> you might want to relay the
incoming token downstream to other services. If you use a
<code>RestTemplate</code> to contact the downstream services then this is just a
matter of how to create the template with the right context.</p>
</div>
<div class="paragraph">
<p>If your service uses <code>UserInfoTokenServices</code> to authenticate incoming
tokens (i.e. it is using the <code>security.oauth2.user-info-uri</code>
configuration), then you can simply create an <code>OAuth2RestTemplate</code>
using an autowired <code>OAuth2ClientContext</code> (it will be populated by the
authentication process before it hits the backend code). Equivalently
(with Spring Boot 1.4), you could inject a
<code>UserInfoRestTemplateFactory</code> and grab its <code>OAuth2RestTemplate</code> in
your configuration. For example:</p>
</div>
<div class="listingblock">
<div class="title">MyConfiguration.java</div>
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">@Bean
public OAuth2RestTemplate restTemplate(UserInfoRestTemplateFactory factory) {
return factory.getUserInfoRestTemplate();
}</code></pre>
</div>
</div>
<div class="paragraph">
<p>This rest template will then have the same <code>OAuth2ClientContext</code>
(request-scoped) that is used by the authentication filter, so you can
use it to send requests with the same access token.</p>
</div>
<div class="paragraph">
<p>If your app is not using <code>UserInfoTokenServices</code> but is still a client
(i.e. it declares <code>@EnableOAuth2Client</code> or <code>@EnableOAuth2Sso</code>), then
with Spring Security Cloud any <code>OAuth2RestOperations</code> that the user
creates from an <code>@Autowired</code> <code>OAuth2Context</code> will also forward
tokens. This feature is implemented by default as an MVC handler
interceptor, so it only works in Spring MVC. If you are not using MVC
you could use a custom filter or AOP interceptor wrapping an
<code>AccessTokenContextRelay</code> to provide the same feature.</p>
</div>
<div class="paragraph">
<p>Here&#8217;s a basic
example showing the use of an autowired rest template created
elsewhere ("foo.com" is a Resource Server accepting the same tokens as
the surrounding app):</p>
</div>
<div class="listingblock">
<div class="title">MyController.java</div>
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">@Autowired
private OAuth2RestOperations restTemplate;
@RequestMapping("/relay")
public String relay() {
ResponseEntity&lt;String&gt; response =
restTemplate.getForEntity("https://foo.com/bar", String.class);
return "Success! (" + response.getBody() + ")";
}</code></pre>
</div>
</div>
<div class="paragraph">
<p>If you don&#8217;t want to forward tokens (and that is a valid
choice, since you might want to act as yourself, rather than the
client that sent you the token), then you only need to create your own
<code>OAuth2Context</code> instead of autowiring the default one.</p>
</div>
<div class="paragraph">
<p>Feign clients will also pick up an interceptor that uses the
<code>OAuth2ClientContext</code> if it is available, so they should also do a
token relay anywhere where a <code>RestTemplate</code> would.</p>
</div>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_configuring_authentication_downstream_of_a_zuul_proxy"><a class="link" href="#_configuring_authentication_downstream_of_a_zuul_proxy">Configuring Authentication Downstream of a Zuul Proxy</a></h2>
<div class="sectionbody">
<div class="paragraph">
<p>You can control the authorization behaviour downstream of an
<code>@EnableZuulProxy</code> through the <code>proxy.auth.*</code> settings. Example:</p>
</div>
<div class="listingblock">
<div class="title">application.yml</div>
<div class="content">
<pre class="highlightjs highlight"><code class="language-yaml hljs" data-lang="yaml">proxy:
auth:
routes:
customers: oauth2
stores: passthru
recommendations: none</code></pre>
</div>
</div>
<div class="paragraph">
<p>In this example the "customers" service gets an OAuth2 token relay,
the "stores" service gets a passthrough (the authorization header is
just passed downstream), and the "recommendations" service has its
authorization header removed. The default behaviour is to do a token
relay if there is a token available, and passthru otherwise.</p>
</div>
<div class="paragraph">
<p>See
<a href="https://github.com/spring-cloud/spring-cloud-security/tree/master/src/main/java/org/springframework/cloud/security/oauth2/proxy/ProxyAuthenticationProperties">
ProxyAuthenticationProperties</a> for full details.</p>
</div>
</div>
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<p>Spring Cloud Security offers a set of primitives for building secure
applications and services with minimum fuss. A declarative model which
can be heavily configured externally (or centrally) lends itself to
the implementation of large systems of co-operating, remote components,
usually with a central indentity management service. It is also extremely
easy to use in a service platform like Cloud Foundry. Building on
Spring Boot and Spring Security OAuth2 we can quickly create systems that
implement common patterns like single sign on, token relay and token
exchange.</p>
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.hljs-deletion,
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color: #e06c75;
}
.hljs-literal {
color: #56b6c2;
}
.hljs-string,
.hljs-regexp,
.hljs-addition,
.hljs-attribute,
.hljs-meta-string {
color: #98c379;
}
.hljs-built_in,
.hljs-class .hljs-title {
color: #e6c07b;
}
.hljs-attr,
.hljs-variable,
.hljs-template-variable,
.hljs-type,
.hljs-selector-class,
.hljs-selector-attr,
.hljs-selector-pseudo,
.hljs-number {
color: #d19a66;
}
.hljs-symbol,
.hljs-bullet,
.hljs-link,
.hljs-meta,
.hljs-selector-id,
.hljs-title {
color: #61aeee;
}
.hljs-emphasis {
font-style: italic;
}
.hljs-strong {
font-weight: bold;
}
.hljs-link {
text-decoration: underline;
}

View File

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/*
Atom One Light by Daniel Gamage
Original One Light Syntax theme from https://github.com/atom/one-light-syntax
base: #fafafa
mono-1: #383a42
mono-2: #686b77
mono-3: #a0a1a7
hue-1: #0184bb
hue-2: #4078f2
hue-3: #a626a4
hue-4: #50a14f
hue-5: #e45649
hue-5-2: #c91243
hue-6: #986801
hue-6-2: #c18401
*/
.hljs {
display: block;
overflow-x: auto;
padding: 0.5em;
color: #383a42;
background: #fafafa;
}
.hljs-comment,
.hljs-quote {
color: #a0a1a7;
font-style: italic;
}
.hljs-doctag,
.hljs-keyword,
.hljs-formula {
color: #a626a4;
}
.hljs-section,
.hljs-name,
.hljs-selector-tag,
.hljs-deletion,
.hljs-subst {
color: #e45649;
}
.hljs-literal {
color: #0184bb;
}
.hljs-string,
.hljs-regexp,
.hljs-addition,
.hljs-attribute,
.hljs-meta-string {
color: #50a14f;
}
.hljs-built_in,
.hljs-class .hljs-title {
color: #c18401;
}
.hljs-attr,
.hljs-variable,
.hljs-template-variable,
.hljs-type,
.hljs-selector-class,
.hljs-selector-attr,
.hljs-selector-pseudo,
.hljs-number {
color: #986801;
}
.hljs-symbol,
.hljs-bullet,
.hljs-link,
.hljs-meta,
.hljs-selector-id,
.hljs-title {
color: #4078f2;
}
.hljs-emphasis {
font-style: italic;
}
.hljs-strong {
font-weight: bold;
}
.hljs-link {
text-decoration: underline;
}

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/*
Dracula Theme v1.2.0
https://github.com/zenorocha/dracula-theme
Copyright 2015, All rights reserved
Code licensed under the MIT license
http://zenorocha.mit-license.org
@author Éverton Ribeiro <nuxlli@gmail.com>
@author Zeno Rocha <hi@zenorocha.com>
*/
.hljs {
display: block;
overflow-x: auto;
padding: 0.5em;
background: #282a36;
}
.hljs-keyword,
.hljs-selector-tag,
.hljs-literal,
.hljs-section,
.hljs-link {
color: #8be9fd;
}
.hljs-function .hljs-keyword {
color: #ff79c6;
}
.hljs,
.hljs-subst {
color: #f8f8f2;
}
.hljs-string,
.hljs-title,
.hljs-name,
.hljs-type,
.hljs-attribute,
.hljs-symbol,
.hljs-bullet,
.hljs-addition,
.hljs-variable,
.hljs-template-tag,
.hljs-template-variable {
color: #f1fa8c;
}
.hljs-comment,
.hljs-quote,
.hljs-deletion,
.hljs-meta {
color: #6272a4;
}
.hljs-keyword,
.hljs-selector-tag,
.hljs-literal,
.hljs-title,
.hljs-section,
.hljs-doctag,
.hljs-type,
.hljs-name,
.hljs-strong {
font-weight: bold;
}
.hljs-emphasis {
font-style: italic;
}

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/*
github.com style (c) Vasily Polovnyov <vast@whiteants.net>
*/
.hljs {
display: block;
overflow-x: auto;
padding: 0.5em;
color: #333;
background: #f8f8f8;
}
.hljs-comment,
.hljs-quote {
color: #998;
font-style: italic;
}
.hljs-keyword,
.hljs-selector-tag,
.hljs-subst {
color: #333;
font-weight: bold;
}
.hljs-number,
.hljs-literal,
.hljs-variable,
.hljs-template-variable,
.hljs-tag .hljs-attr {
color: #008080;
}
.hljs-string,
.hljs-doctag {
color: #d14;
}
.hljs-title,
.hljs-section,
.hljs-selector-id {
color: #900;
font-weight: bold;
}
.hljs-subst {
font-weight: normal;
}
.hljs-type,
.hljs-class .hljs-title {
color: #458;
font-weight: bold;
}
.hljs-tag,
.hljs-name,
.hljs-attribute {
color: #000080;
font-weight: normal;
}
.hljs-regexp,
.hljs-link {
color: #009926;
}
.hljs-symbol,
.hljs-bullet {
color: #990073;
}
.hljs-built_in,
.hljs-builtin-name {
color: #0086b3;
}
.hljs-meta {
color: #999;
font-weight: bold;
}
.hljs-deletion {
background: #fdd;
}
.hljs-addition {
background: #dfd;
}
.hljs-emphasis {
font-style: italic;
}
.hljs-strong {
font-weight: bold;
}

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/*
Monokai Sublime style. Derived from Monokai by noformnocontent http://nn.mit-license.org/
*/
.hljs {
display: block;
overflow-x: auto;
padding: 0.5em;
background: #23241f;
}
.hljs,
.hljs-tag,
.hljs-subst {
color: #f8f8f2;
}
.hljs-strong,
.hljs-emphasis {
color: #a8a8a2;
}
.hljs-bullet,
.hljs-quote,
.hljs-number,
.hljs-regexp,
.hljs-literal,
.hljs-link {
color: #ae81ff;
}
.hljs-code,
.hljs-title,
.hljs-section,
.hljs-selector-class {
color: #a6e22e;
}
.hljs-strong {
font-weight: bold;
}
.hljs-emphasis {
font-style: italic;
}
.hljs-keyword,
.hljs-selector-tag,
.hljs-name,
.hljs-attr {
color: #f92672;
}
.hljs-symbol,
.hljs-attribute {
color: #66d9ef;
}
.hljs-params,
.hljs-class .hljs-title {
color: #f8f8f2;
}
.hljs-string,
.hljs-type,
.hljs-built_in,
.hljs-builtin-name,
.hljs-selector-id,
.hljs-selector-attr,
.hljs-selector-pseudo,
.hljs-addition,
.hljs-variable,
.hljs-template-variable {
color: #e6db74;
}
.hljs-comment,
.hljs-deletion,
.hljs-meta {
color: #75715e;
}

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/*
Monokai style - ported by Luigi Maselli - http://grigio.org
*/
.hljs {
display: block;
overflow-x: auto;
padding: 0.5em;
background: #272822; color: #ddd;
}
.hljs-tag,
.hljs-keyword,
.hljs-selector-tag,
.hljs-literal,
.hljs-strong,
.hljs-name {
color: #f92672;
}
.hljs-code {
color: #66d9ef;
}
.hljs-class .hljs-title {
color: white;
}
.hljs-attribute,
.hljs-symbol,
.hljs-regexp,
.hljs-link {
color: #bf79db;
}
.hljs-string,
.hljs-bullet,
.hljs-subst,
.hljs-title,
.hljs-section,
.hljs-emphasis,
.hljs-type,
.hljs-built_in,
.hljs-builtin-name,
.hljs-selector-attr,
.hljs-selector-pseudo,
.hljs-addition,
.hljs-variable,
.hljs-template-tag,
.hljs-template-variable {
color: #a6e22e;
}
.hljs-comment,
.hljs-quote,
.hljs-deletion,
.hljs-meta {
color: #75715e;
}
.hljs-keyword,
.hljs-selector-tag,
.hljs-literal,
.hljs-doctag,
.hljs-title,
.hljs-section,
.hljs-type,
.hljs-selector-id {
font-weight: bold;
}

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/*
Orginal Style from ethanschoonover.com/solarized (c) Jeremy Hull <sourdrums@gmail.com>
*/
.hljs {
display: block;
overflow-x: auto;
padding: 0.5em;
background: #fdf6e3;
color: #657b83;
}
.hljs-comment,
.hljs-quote {
color: #93a1a1;
}
/* Solarized Green */
.hljs-keyword,
.hljs-selector-tag,
.hljs-addition {
color: #859900;
}
/* Solarized Cyan */
.hljs-number,
.hljs-string,
.hljs-meta .hljs-meta-string,
.hljs-literal,
.hljs-doctag,
.hljs-regexp {
color: #2aa198;
}
/* Solarized Blue */
.hljs-title,
.hljs-section,
.hljs-name,
.hljs-selector-id,
.hljs-selector-class {
color: #268bd2;
}
/* Solarized Yellow */
.hljs-attribute,
.hljs-attr,
.hljs-variable,
.hljs-template-variable,
.hljs-class .hljs-title,
.hljs-type {
color: #b58900;
}
/* Solarized Orange */
.hljs-symbol,
.hljs-bullet,
.hljs-subst,
.hljs-meta,
.hljs-meta .hljs-keyword,
.hljs-selector-attr,
.hljs-selector-pseudo,
.hljs-link {
color: #cb4b16;
}
/* Solarized Red */
.hljs-built_in,
.hljs-deletion {
color: #dc322f;
}
.hljs-formula {
background: #eee8d5;
}
.hljs-emphasis {
font-style: italic;
}
.hljs-strong {
font-weight: bold;
}

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/*
Zenburn style from voldmar.ru (c) Vladimir Epifanov <voldmar@voldmar.ru>
based on dark.css by Ivan Sagalaev
*/
.hljs {
display: block;
overflow-x: auto;
padding: 0.5em;
background: #3f3f3f;
color: #dcdcdc;
}
.hljs-keyword,
.hljs-selector-tag,
.hljs-tag {
color: #e3ceab;
}
.hljs-template-tag {
color: #dcdcdc;
}
.hljs-number {
color: #8cd0d3;
}
.hljs-variable,
.hljs-template-variable,
.hljs-attribute {
color: #efdcbc;
}
.hljs-literal {
color: #efefaf;
}
.hljs-subst {
color: #8f8f8f;
}
.hljs-title,
.hljs-name,
.hljs-selector-id,
.hljs-selector-class,
.hljs-section,
.hljs-type {
color: #efef8f;
}
.hljs-symbol,
.hljs-bullet,
.hljs-link {
color: #dca3a3;
}
.hljs-deletion,
.hljs-string,
.hljs-built_in,
.hljs-builtin-name {
color: #cc9393;
}
.hljs-addition,
.hljs-comment,
.hljs-quote,
.hljs-meta {
color: #7f9f7f;
}
.hljs-emphasis {
font-style: italic;
}
.hljs-strong {
font-weight: bold;
}

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var toctitle = document.getElementById('toctitle');
var path = window.location.pathname;
if (toctitle != null) {
var oldtoc = toctitle.nextElementSibling;
var newtoc = document.createElement('div');
newtoc.setAttribute('id', 'tocbot');
newtoc.setAttribute('class', 'js-toc desktop-toc');
oldtoc.setAttribute('class', 'mobile-toc');
oldtoc.parentNode.appendChild(newtoc);
tocbot.init({
contentSelector: '#content',
headingSelector: 'h1, h2, h3, h4, h5',
positionFixedSelector: 'body',
fixedSidebarOffset: 90,
smoothScroll: false
});
if (!path.endsWith("index.html") && !path.endsWith("/")) {
var link = document.createElement("a");
link.setAttribute("href", "index.html");
link.innerHTML = "<span><i class=\"fa fa-chevron-left\" aria-hidden=\"true\"></i></span> Back to index";
var block = document.createElement("div");
block.setAttribute('class', 'back-action');
block.appendChild(link);
var toc = document.getElementById('toc');
var next = document.getElementById('toctitle').nextElementSibling;
toc.insertBefore(block, next);
}
}
var headerHtml = '<div id="header-spring">\n' +
'<h1>\n' +
'<svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0" y="0"\n' +
'viewBox="0 0 245.8 45.3" style="enable-background:new 0 0 245.8 45.3;" xml:space="preserve">\n' +
'<g id="logos">\n' +
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<title>OAuth2 Single Sign On</title>
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</head>
<body class="book toc2 toc-left">
<div id="header">
<div id="toc" class="toc2">
<div id="toctitle">Table of Contents</div>
<ul class="sectlevel2">
<li><a href="#_oauth2_single_sign_on">OAuth2 Single Sign On</a></li>
<li><a href="#_oauth2_protected_resource">OAuth2 Protected Resource</a></li>
</ul>
</div>
</div>
<div id="content">
<div class="sect2">
<h3 id="_oauth2_single_sign_on"><a class="link" href="#_oauth2_single_sign_on">OAuth2 Single Sign On</a></h3>
<div class="paragraph">
<p>Here&#8217;s a Spring Cloud "Hello World" app with HTTP Basic
authentication and a single user account:</p>
</div>
<div class="listingblock">
<div class="title">app.groovy</div>
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">@Grab('spring-boot-starter-security')
@Controller
class Application {
@RequestMapping('/')
String home() {
'Hello World'
}
}</code></pre>
</div>
</div>
<div class="paragraph">
<p>You can run it with <code>spring run app.groovy</code> and watch the logs for the password (username is "user"). So far this is just the default for a Spring Boot app.</p>
</div>
<div class="paragraph">
<p>Here&#8217;s a Spring Cloud app with OAuth2 SSO:</p>
</div>
<div class="listingblock">
<div class="title">app.groovy</div>
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">@Controller
@EnableOAuth2Sso
class Application {
@RequestMapping('/')
String home() {
'Hello World'
}
}</code></pre>
</div>
</div>
<div class="paragraph">
<p>Spot the difference? This app will actually behave exactly the same as
the previous one, because it doesn&#8217;t know it&#8217;s OAuth2 credentals
yet.</p>
</div>
<div class="paragraph">
<p>You can register an app in github quite easily, so try that if you
want a production app on your own domain. If you are happy to test on
localhost:8080, then set up these properties in your application
configuration:</p>
</div>
<div class="listingblock">
<div class="title">application.yml</div>
<div class="content">
<pre class="highlightjs highlight"><code class="language-yaml hljs" data-lang="yaml">security:
oauth2:
client:
clientId: bd1c0a783ccdd1c9b9e4
clientSecret: 1a9030fbca47a5b2c28e92f19050bb77824b5ad1
accessTokenUri: https://github.com/login/oauth/access_token
userAuthorizationUri: https://github.com/login/oauth/authorize
clientAuthenticationScheme: form
resource:
userInfoUri: https://api.github.com/user
preferTokenInfo: false</code></pre>
</div>
</div>
<div class="paragraph">
<p>run the app above and it will redirect to github for authorization. If
you are already signed into github you won&#8217;t even notice that it has
authenticated. These credentials will only work if your app is
running on port 8080.</p>
</div>
<div class="paragraph">
<p>To limit the scope that the client asks for when it obtains an access token
you can set <code>security.oauth2.client.scope</code> (comma separated or an array in YAML). By
default the scope is empty and it is up to to Authorization Server to
decide what the defaults should be, usually depending on the settings in
the client registration that it holds.</p>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<i class="fa icon-note" title="Note"></i>
</td>
<td class="content">
The examples above are all Groovy scripts. If you want to write the
same code in Java (or Groovy) you need to add Spring Security OAuth2
to the classpath (e.g. see the
<a href="https://github.com/spring-cloud-samples/sso">sample here</a>).
</td>
</tr>
</table>
</div>
</div>
<div class="sect2">
<h3 id="_oauth2_protected_resource"><a class="link" href="#_oauth2_protected_resource">OAuth2 Protected Resource</a></h3>
<div class="paragraph">
<p>You want to protect an API resource with an OAuth2 token? Here&#8217;s a
simple example (paired with the client above):</p>
</div>
<div class="listingblock">
<div class="title">app.groovy</div>
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">@Grab('spring-cloud-starter-security')
@RestController
@EnableResourceServer
class Application {
@RequestMapping('/')
def home() {
[message: 'Hello World']
}
}</code></pre>
</div>
</div>
<div class="paragraph">
<p>and</p>
</div>
<div class="listingblock">
<div class="title">application.yml</div>
<div class="content">
<pre class="highlightjs highlight"><code class="language-yaml hljs" data-lang="yaml">security:
oauth2:
resource:
userInfoUri: https://api.github.com/user
preferTokenInfo: false</code></pre>
</div>
</div>
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<body class="book toc2 toc-left">
<div id="header">
<h1>Spring Cloud Security</h1>
<div id="toc" class="toc2">
<div id="toctitle">Table of Contents</div>
<ul class="sectlevel1">
<li><a href="#_quickstart">Quickstart</a>
<ul class="sectlevel2">
<li><a href="#_oauth2_single_sign_on">OAuth2 Single Sign On</a></li>
<li><a href="#_oauth2_protected_resource">OAuth2 Protected Resource</a></li>
</ul>
</li>
<li><a href="#_more_detail">More Detail</a>
<ul class="sectlevel2">
<li><a href="#_single_sign_on">Single Sign On</a></li>
<li><a href="#_token_relay">Token Relay</a></li>
</ul>
</li>
<li><a href="#_configuring_authentication_downstream_of_a_zuul_proxy">Configuring Authentication Downstream of a Zuul Proxy</a></li>
</ul>
</div>
</div>
<div id="content">
<div id="preamble">
<div class="sectionbody">
<div class="paragraph">
<p>Spring Cloud Security offers a set of primitives for building secure
applications and services with minimum fuss. A declarative model which
can be heavily configured externally (or centrally) lends itself to
the implementation of large systems of co-operating, remote components,
usually with a central indentity management service. It is also extremely
easy to use in a service platform like Cloud Foundry. Building on
Spring Boot and Spring Security OAuth2 we can quickly create systems that
implement common patterns like single sign on, token relay and token
exchange.</p>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<i class="fa icon-note" title="Note"></i>
</td>
<td class="content">
Spring Cloud is released under the non-restrictive Apache 2.0 license. If you would like to contribute to this section of the documentation or if you find an error, please find the source code and issue trackers in the project at <a href="https://github.com/spring-cloud/spring-cloud-security/tree/master/src/main/asciidoc">github</a>.
</td>
</tr>
</table>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_quickstart"><a class="link" href="#_quickstart">Quickstart</a></h2>
<div class="sectionbody">
<div class="sect2">
<h3 id="_oauth2_single_sign_on"><a class="link" href="#_oauth2_single_sign_on">OAuth2 Single Sign On</a></h3>
<div class="paragraph">
<p>Here&#8217;s a Spring Cloud "Hello World" app with HTTP Basic
authentication and a single user account:</p>
</div>
<div class="listingblock">
<div class="title">app.groovy</div>
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">@Grab('spring-boot-starter-security')
@Controller
class Application {
@RequestMapping('/')
String home() {
'Hello World'
}
}</code></pre>
</div>
</div>
<div class="paragraph">
<p>You can run it with <code>spring run app.groovy</code> and watch the logs for the password (username is "user"). So far this is just the default for a Spring Boot app.</p>
</div>
<div class="paragraph">
<p>Here&#8217;s a Spring Cloud app with OAuth2 SSO:</p>
</div>
<div class="listingblock">
<div class="title">app.groovy</div>
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">@Controller
@EnableOAuth2Sso
class Application {
@RequestMapping('/')
String home() {
'Hello World'
}
}</code></pre>
</div>
</div>
<div class="paragraph">
<p>Spot the difference? This app will actually behave exactly the same as
the previous one, because it doesn&#8217;t know it&#8217;s OAuth2 credentals
yet.</p>
</div>
<div class="paragraph">
<p>You can register an app in github quite easily, so try that if you
want a production app on your own domain. If you are happy to test on
localhost:8080, then set up these properties in your application
configuration:</p>
</div>
<div class="listingblock">
<div class="title">application.yml</div>
<div class="content">
<pre class="highlightjs highlight"><code class="language-yaml hljs" data-lang="yaml">security:
oauth2:
client:
clientId: bd1c0a783ccdd1c9b9e4
clientSecret: 1a9030fbca47a5b2c28e92f19050bb77824b5ad1
accessTokenUri: https://github.com/login/oauth/access_token
userAuthorizationUri: https://github.com/login/oauth/authorize
clientAuthenticationScheme: form
resource:
userInfoUri: https://api.github.com/user
preferTokenInfo: false</code></pre>
</div>
</div>
<div class="paragraph">
<p>run the app above and it will redirect to github for authorization. If
you are already signed into github you won&#8217;t even notice that it has
authenticated. These credentials will only work if your app is
running on port 8080.</p>
</div>
<div class="paragraph">
<p>To limit the scope that the client asks for when it obtains an access token
you can set <code>security.oauth2.client.scope</code> (comma separated or an array in YAML). By
default the scope is empty and it is up to to Authorization Server to
decide what the defaults should be, usually depending on the settings in
the client registration that it holds.</p>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<i class="fa icon-note" title="Note"></i>
</td>
<td class="content">
The examples above are all Groovy scripts. If you want to write the
same code in Java (or Groovy) you need to add Spring Security OAuth2
to the classpath (e.g. see the
<a href="https://github.com/spring-cloud-samples/sso">sample here</a>).
</td>
</tr>
</table>
</div>
</div>
<div class="sect2">
<h3 id="_oauth2_protected_resource"><a class="link" href="#_oauth2_protected_resource">OAuth2 Protected Resource</a></h3>
<div class="paragraph">
<p>You want to protect an API resource with an OAuth2 token? Here&#8217;s a
simple example (paired with the client above):</p>
</div>
<div class="listingblock">
<div class="title">app.groovy</div>
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">@Grab('spring-cloud-starter-security')
@RestController
@EnableResourceServer
class Application {
@RequestMapping('/')
def home() {
[message: 'Hello World']
}
}</code></pre>
</div>
</div>
<div class="paragraph">
<p>and</p>
</div>
<div class="listingblock">
<div class="title">application.yml</div>
<div class="content">
<pre class="highlightjs highlight"><code class="language-yaml hljs" data-lang="yaml">security:
oauth2:
resource:
userInfoUri: https://api.github.com/user
preferTokenInfo: false</code></pre>
</div>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_more_detail"><a class="link" href="#_more_detail">More Detail</a></h2>
<div class="sectionbody">
<div class="sect2">
<h3 id="_single_sign_on"><a class="link" href="#_single_sign_on">Single Sign On</a></h3>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<i class="fa icon-note" title="Note"></i>
</td>
<td class="content">
All of the OAuth2 SSO and resource server features moved to Spring Boot
in version 1.3. You can find documentation in the
<a href="https://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/">Spring Boot user guide</a>.
</td>
</tr>
</table>
</div>
</div>
<div class="sect2">
<h3 id="_token_relay"><a class="link" href="#_token_relay">Token Relay</a></h3>
<div class="paragraph">
<p>A Token Relay is where an OAuth2 consumer acts as a Client and
forwards the incoming token to outgoing resource requests. The
consumer can be a pure Client (like an SSO application) or a Resource
Server.</p>
</div>
<div class="sect3">
<h4 id="_client_token_relay_in_spring_cloud_gateway"><a class="link" href="#_client_token_relay_in_spring_cloud_gateway">Client Token Relay in Spring Cloud Gateway</a></h4>
<div class="paragraph">
<p>If your app also has a
<a href="https://cloud.spring.io/spring-cloud-static/current/single/spring-cloud.html#_spring_cloud_gateway">Spring
Cloud Gateway</a> embedded reverse proxy then you
can ask it to forward OAuth2 access tokens downstream to the services
it is proxying. Thus the SSO app above can be enhanced simply like
this:</p>
</div>
<div class="listingblock">
<div class="title">App.java</div>
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">@Autowired
private TokenRelayGatewayFilterFactory filterFactory;
@Bean
public RouteLocator customRouteLocator(RouteLocatorBuilder builder) {
return builder.routes()
.route("resource", r -&gt; r.path("/resource")
.filters(f -&gt; f.filter(filterFactory.apply()))
.uri("http://localhost:9000"))
.build();
}</code></pre>
</div>
</div>
<div class="paragraph">
<p>or this</p>
</div>
<div class="listingblock">
<div class="title">application.yaml</div>
<div class="content">
<pre class="highlightjs highlight"><code class="language-yaml hljs" data-lang="yaml">spring:
cloud:
gateway:
routes:
- id: resource
uri: http://localhost:9000
predicates:
- Path=/resource
filters:
- TokenRelay=</code></pre>
</div>
</div>
<div class="paragraph">
<p>and it will (in addition to logging the user in and grabbing a token)
pass the authentication token downstream to the services (in this case
<code>/resource</code>).</p>
</div>
<div class="paragraph">
<p>To enable this for Spring Cloud Gateway add the following dependencies</p>
</div>
<div class="ulist">
<ul>
<li>
<p><code>org.springframework.boot:spring-boot-starter-oauth2-client</code></p>
</li>
<li>
<p><code>org.springframework.cloud:spring-cloud-starter-security</code></p>
</li>
</ul>
</div>
<div class="paragraph">
<p>How does it work? The
<a href="https://github.com/spring-cloud/spring-cloud-security/tree/master/src/main/java/org/springframework/cloud/security/oauth2/gateway/TokenRelayGatewayFilterFactory.java">filter</a>
extracts an access token from the currently authenticated user,
and puts it in a request header for the downstream requests.</p>
</div>
<div class="paragraph">
<p>For a full working sample see <a href="https://github.com/spring-cloud-samples/sample-gateway-oauth2login">this project</a>.</p>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<i class="fa icon-note" title="Note"></i>
</td>
<td class="content">
The default implementation of <code>ReactiveOAuth2AuthorizedClientService</code> used by <code>TokenRelayGatewayFilterFactory</code>
uses an in-memory data store. You will need to provide your own implementation <code>ReactiveOAuth2AuthorizedClientService</code>
if you need a more robust solution.
</td>
</tr>
</table>
</div>
</div>
<div class="sect3">
<h4 id="_client_token_relay"><a class="link" href="#_client_token_relay">Client Token Relay</a></h4>
<div class="paragraph">
<p>If your app is a user facing OAuth2 client (i.e. has declared
<code>@EnableOAuth2Sso</code> or <code>@EnableOAuth2Client</code>) then it has an
<code>OAuth2ClientContext</code> in request scope from Spring Boot. You can
create your own <code>OAuth2RestTemplate</code> from this context and an
autowired <code>OAuth2ProtectedResourceDetails</code>, and then the context will
always forward the access token downstream, also refreshing the access
token automatically if it expires. (These are features of Spring
Security and Spring Boot.)</p>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<i class="fa icon-note" title="Note"></i>
</td>
<td class="content">
Spring Boot (1.4.1) does not create an
<code>OAuth2ProtectedResourceDetails</code> automatically if you are using
<code>client_credentials</code> tokens. In that case you need to create your own
<code>ClientCredentialsResourceDetails</code> and configure it with
<code>@ConfigurationProperties("security.oauth2.client")</code>.
</td>
</tr>
</table>
</div>
</div>
<div class="sect3">
<h4 id="_client_token_relay_in_zuul_proxy"><a class="link" href="#_client_token_relay_in_zuul_proxy">Client Token Relay in Zuul Proxy</a></h4>
<div class="paragraph">
<p>If your app also has a
<a href="https://cloud.spring.io/spring-cloud.html#netflix-zuul-reverse-proxy">Spring
Cloud Zuul</a> embedded reverse proxy (using <code>@EnableZuulProxy</code>) then you
can ask it to forward OAuth2 access tokens downstream to the services
it is proxying. Thus the SSO app above can be enhanced simply like
this:</p>
</div>
<div class="listingblock">
<div class="title">app.groovy</div>
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">@Controller
@EnableOAuth2Sso
@EnableZuulProxy
class Application {
}</code></pre>
</div>
</div>
<div class="paragraph">
<p>and it will (in addition to logging the user in and grabbing a token)
pass the authentication token downstream to the <code>/proxy/*</code>
services. If those services are implemented with
<code>@EnableResourceServer</code> then they will get a valid token in the
correct header.</p>
</div>
<div class="paragraph">
<p>How does it work? The <code>@EnableOAuth2Sso</code> annotation pulls in
<code>spring-cloud-starter-security</code> (which you could do manually in a
traditional app), and that in turn triggers some autoconfiguration for
a <code>ZuulFilter</code>, which itself is activated because Zuul is on the
classpath (via <code>@EnableZuulProxy</code>). The
<a href="https://github.com/spring-cloud/spring-cloud-security/tree/master/src/main/java/org/springframework/cloud/security/oauth2/proxy/OAuth2TokenRelayFilter.java">filter</a>
just extracts an access token from the currently authenticated user,
and puts it in a request header for the downstream requests.</p>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<i class="fa icon-note" title="Note"></i>
</td>
<td class="content">
Spring Boot does not create an <code>OAuth2RestOperations</code> automatically which is needed for <code>refresh_token</code>. In that case you need to create your own
<code>OAuth2RestOperations</code> so <code>OAuth2TokenRelayFilter</code> can refresh the token if needed.
</td>
</tr>
</table>
</div>
</div>
<div class="sect3">
<h4 id="_resource_server_token_relay"><a class="link" href="#_resource_server_token_relay">Resource Server Token Relay</a></h4>
<div class="paragraph">
<p>If your app has <code>@EnableResourceServer</code> you might want to relay the
incoming token downstream to other services. If you use a
<code>RestTemplate</code> to contact the downstream services then this is just a
matter of how to create the template with the right context.</p>
</div>
<div class="paragraph">
<p>If your service uses <code>UserInfoTokenServices</code> to authenticate incoming
tokens (i.e. it is using the <code>security.oauth2.user-info-uri</code>
configuration), then you can simply create an <code>OAuth2RestTemplate</code>
using an autowired <code>OAuth2ClientContext</code> (it will be populated by the
authentication process before it hits the backend code). Equivalently
(with Spring Boot 1.4), you could inject a
<code>UserInfoRestTemplateFactory</code> and grab its <code>OAuth2RestTemplate</code> in
your configuration. For example:</p>
</div>
<div class="listingblock">
<div class="title">MyConfiguration.java</div>
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">@Bean
public OAuth2RestTemplate restTemplate(UserInfoRestTemplateFactory factory) {
return factory.getUserInfoRestTemplate();
}</code></pre>
</div>
</div>
<div class="paragraph">
<p>This rest template will then have the same <code>OAuth2ClientContext</code>
(request-scoped) that is used by the authentication filter, so you can
use it to send requests with the same access token.</p>
</div>
<div class="paragraph">
<p>If your app is not using <code>UserInfoTokenServices</code> but is still a client
(i.e. it declares <code>@EnableOAuth2Client</code> or <code>@EnableOAuth2Sso</code>), then
with Spring Security Cloud any <code>OAuth2RestOperations</code> that the user
creates from an <code>@Autowired</code> <code>OAuth2Context</code> will also forward
tokens. This feature is implemented by default as an MVC handler
interceptor, so it only works in Spring MVC. If you are not using MVC
you could use a custom filter or AOP interceptor wrapping an
<code>AccessTokenContextRelay</code> to provide the same feature.</p>
</div>
<div class="paragraph">
<p>Here&#8217;s a basic
example showing the use of an autowired rest template created
elsewhere ("foo.com" is a Resource Server accepting the same tokens as
the surrounding app):</p>
</div>
<div class="listingblock">
<div class="title">MyController.java</div>
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">@Autowired
private OAuth2RestOperations restTemplate;
@RequestMapping("/relay")
public String relay() {
ResponseEntity&lt;String&gt; response =
restTemplate.getForEntity("https://foo.com/bar", String.class);
return "Success! (" + response.getBody() + ")";
}</code></pre>
</div>
</div>
<div class="paragraph">
<p>If you don&#8217;t want to forward tokens (and that is a valid
choice, since you might want to act as yourself, rather than the
client that sent you the token), then you only need to create your own
<code>OAuth2Context</code> instead of autowiring the default one.</p>
</div>
<div class="paragraph">
<p>Feign clients will also pick up an interceptor that uses the
<code>OAuth2ClientContext</code> if it is available, so they should also do a
token relay anywhere where a <code>RestTemplate</code> would.</p>
</div>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_configuring_authentication_downstream_of_a_zuul_proxy"><a class="link" href="#_configuring_authentication_downstream_of_a_zuul_proxy">Configuring Authentication Downstream of a Zuul Proxy</a></h2>
<div class="sectionbody">
<div class="paragraph">
<p>You can control the authorization behaviour downstream of an
<code>@EnableZuulProxy</code> through the <code>proxy.auth.*</code> settings. Example:</p>
</div>
<div class="listingblock">
<div class="title">application.yml</div>
<div class="content">
<pre class="highlightjs highlight"><code class="language-yaml hljs" data-lang="yaml">proxy:
auth:
routes:
customers: oauth2
stores: passthru
recommendations: none</code></pre>
</div>
</div>
<div class="paragraph">
<p>In this example the "customers" service gets an OAuth2 token relay,
the "stores" service gets a passthrough (the authorization header is
just passed downstream), and the "recommendations" service has its
authorization header removed. The default behaviour is to do a token
relay if there is a token available, and passthru otherwise.</p>
</div>
<div class="paragraph">
<p>See
<a href="https://github.com/spring-cloud/spring-cloud-security/tree/master/src/main/java/org/springframework/cloud/security/oauth2/proxy/ProxyAuthenticationProperties">
ProxyAuthenticationProperties</a> for full details.</p>
</div>
</div>
</div>
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.hljs-builtin-name,
.hljs-selector-attr,
.hljs-selector-pseudo,
.hljs-addition,
.hljs-variable,
.hljs-template-tag,
.hljs-template-variable {
color: #a6e22e;
}
.hljs-comment,
.hljs-quote,
.hljs-deletion,
.hljs-meta {
color: #75715e;
}
.hljs-keyword,
.hljs-selector-tag,
.hljs-literal,
.hljs-doctag,
.hljs-title,
.hljs-section,
.hljs-type,
.hljs-selector-id {
font-weight: bold;
}

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/*
Orginal Style from ethanschoonover.com/solarized (c) Jeremy Hull <sourdrums@gmail.com>
*/
.hljs {
display: block;
overflow-x: auto;
padding: 0.5em;
background: #fdf6e3;
color: #657b83;
}
.hljs-comment,
.hljs-quote {
color: #93a1a1;
}
/* Solarized Green */
.hljs-keyword,
.hljs-selector-tag,
.hljs-addition {
color: #859900;
}
/* Solarized Cyan */
.hljs-number,
.hljs-string,
.hljs-meta .hljs-meta-string,
.hljs-literal,
.hljs-doctag,
.hljs-regexp {
color: #2aa198;
}
/* Solarized Blue */
.hljs-title,
.hljs-section,
.hljs-name,
.hljs-selector-id,
.hljs-selector-class {
color: #268bd2;
}
/* Solarized Yellow */
.hljs-attribute,
.hljs-attr,
.hljs-variable,
.hljs-template-variable,
.hljs-class .hljs-title,
.hljs-type {
color: #b58900;
}
/* Solarized Orange */
.hljs-symbol,
.hljs-bullet,
.hljs-subst,
.hljs-meta,
.hljs-meta .hljs-keyword,
.hljs-selector-attr,
.hljs-selector-pseudo,
.hljs-link {
color: #cb4b16;
}
/* Solarized Red */
.hljs-built_in,
.hljs-deletion {
color: #dc322f;
}
.hljs-formula {
background: #eee8d5;
}
.hljs-emphasis {
font-style: italic;
}
.hljs-strong {
font-weight: bold;
}

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/*
Zenburn style from voldmar.ru (c) Vladimir Epifanov <voldmar@voldmar.ru>
based on dark.css by Ivan Sagalaev
*/
.hljs {
display: block;
overflow-x: auto;
padding: 0.5em;
background: #3f3f3f;
color: #dcdcdc;
}
.hljs-keyword,
.hljs-selector-tag,
.hljs-tag {
color: #e3ceab;
}
.hljs-template-tag {
color: #dcdcdc;
}
.hljs-number {
color: #8cd0d3;
}
.hljs-variable,
.hljs-template-variable,
.hljs-attribute {
color: #efdcbc;
}
.hljs-literal {
color: #efefaf;
}
.hljs-subst {
color: #8f8f8f;
}
.hljs-title,
.hljs-name,
.hljs-selector-id,
.hljs-selector-class,
.hljs-section,
.hljs-type {
color: #efef8f;
}
.hljs-symbol,
.hljs-bullet,
.hljs-link {
color: #dca3a3;
}
.hljs-deletion,
.hljs-string,
.hljs-built_in,
.hljs-builtin-name {
color: #cc9393;
}
.hljs-addition,
.hljs-comment,
.hljs-quote,
.hljs-meta {
color: #7f9f7f;
}
.hljs-emphasis {
font-style: italic;
}
.hljs-strong {
font-weight: bold;
}

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var toctitle = document.getElementById('toctitle');
var path = window.location.pathname;
if (toctitle != null) {
var oldtoc = toctitle.nextElementSibling;
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newtoc.setAttribute('id', 'tocbot');
newtoc.setAttribute('class', 'js-toc desktop-toc');
oldtoc.setAttribute('class', 'mobile-toc');
oldtoc.parentNode.appendChild(newtoc);
tocbot.init({
contentSelector: '#content',
headingSelector: 'h1, h2, h3, h4, h5',
positionFixedSelector: 'body',
fixedSidebarOffset: 90,
smoothScroll: false
});
if (!path.endsWith("index.html") && !path.endsWith("/")) {
var link = document.createElement("a");
link.setAttribute("href", "index.html");
link.innerHTML = "<span><i class=\"fa fa-chevron-left\" aria-hidden=\"true\"></i></span> Back to index";
var block = document.createElement("div");
block.setAttribute('class', 'back-action');
block.appendChild(link);
var toc = document.getElementById('toc');
var next = document.getElementById('toctitle').nextElementSibling;
toc.insertBefore(block, next);
}
}
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var header = document.createElement("div");
header.innerHTML = headerHtml;
document.body.insertBefore(header, document.body.firstChild);

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