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Better encapsulation for CORS default permit configuration

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This commit also improves CorsRegistration Javadoc.

Issue: SPR-14798
This commit is contained in:
Sebastien Deleuze
2016-10-18 14:49:12 +02:00
committed by Rossen Stoyanchev
parent 25e7cd577d
commit 50f2cda009
8 changed files with 160 additions and 98 deletions
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37
spring-webmvc/src/main/java/org/springframework/web/servlet/config/CorsBeanDefinitionParser.java
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@@ -26,7 +26,6 @@ import org.w3c.dom.Element;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.xml.BeanDefinitionParser;
import org.springframework.beans.factory.xml.ParserContext;
import org.springframework.http.HttpMethod;
import org.springframework.util.StringUtils;
import org.springframework.util.xml.DomUtils;
import org.springframework.web.cors.CorsConfiguration;
@@ -42,18 +41,6 @@ import org.springframework.web.cors.CorsConfiguration;
*/
public class CorsBeanDefinitionParser implements BeanDefinitionParser {
private static final List<String> DEFAULT_ALLOWED_ORIGINS = Arrays.asList("*");
private static final List<String> DEFAULT_ALLOWED_METHODS =
Arrays.asList(HttpMethod.GET.name(), HttpMethod.HEAD.name(), HttpMethod.POST.name());
private static final List<String> DEFAULT_ALLOWED_HEADERS = Arrays.asList("*");
private static final boolean DEFAULT_ALLOW_CREDENTIALS = true;
private static final long DEFAULT_MAX_AGE = 1600;
@Override
public BeanDefinition parse(Element element, ParserContext parserContext) {
@@ -61,12 +48,7 @@ public class CorsBeanDefinitionParser implements BeanDefinitionParser {
List<Element> mappings = DomUtils.getChildElementsByTagName(element, "mapping");
if (mappings.isEmpty()) {
CorsConfiguration config = new CorsConfiguration();
config.setAllowedOrigins(DEFAULT_ALLOWED_ORIGINS);
config.setAllowedMethods(DEFAULT_ALLOWED_METHODS);
config.setAllowedHeaders(DEFAULT_ALLOWED_HEADERS);
config.setAllowCredentials(DEFAULT_ALLOW_CREDENTIALS);
config.setMaxAge(DEFAULT_MAX_AGE);
CorsConfiguration config = new CorsConfiguration().applyDefaultPermitConfiguration();
corsConfigurations.put("/**", config);
}
else {
@@ -76,23 +58,14 @@ public class CorsBeanDefinitionParser implements BeanDefinitionParser {
String[] allowedOrigins = StringUtils.tokenizeToStringArray(mapping.getAttribute("allowed-origins"), ",");
config.setAllowedOrigins(Arrays.asList(allowedOrigins));
}
else {
config.setAllowedOrigins(DEFAULT_ALLOWED_ORIGINS);
}
if (mapping.hasAttribute("allowed-methods")) {
String[] allowedMethods = StringUtils.tokenizeToStringArray(mapping.getAttribute("allowed-methods"), ",");
config.setAllowedMethods(Arrays.asList(allowedMethods));
}
else {
config.setAllowedMethods(DEFAULT_ALLOWED_METHODS);
}
if (mapping.hasAttribute("allowed-headers")) {
String[] allowedHeaders = StringUtils.tokenizeToStringArray(mapping.getAttribute("allowed-headers"), ",");
config.setAllowedHeaders(Arrays.asList(allowedHeaders));
}
else {
config.setAllowedHeaders(DEFAULT_ALLOWED_HEADERS);
}
if (mapping.hasAttribute("exposed-headers")) {
String[] exposedHeaders = StringUtils.tokenizeToStringArray(mapping.getAttribute("exposed-headers"), ",");
config.setExposedHeaders(Arrays.asList(exposedHeaders));
@@ -100,16 +73,10 @@ public class CorsBeanDefinitionParser implements BeanDefinitionParser {
if (mapping.hasAttribute("allow-credentials")) {
config.setAllowCredentials(Boolean.parseBoolean(mapping.getAttribute("allow-credentials")));
}
else {
config.setAllowCredentials(DEFAULT_ALLOW_CREDENTIALS);
}
if (mapping.hasAttribute("max-age")) {
config.setMaxAge(Long.parseLong(mapping.getAttribute("max-age")));
}
else {
config.setMaxAge(DEFAULT_MAX_AGE);
}
corsConfigurations.put(mapping.getAttribute("path"), config);
corsConfigurations.put(mapping.getAttribute("path"), config.applyDefaultPermitConfiguration());
}
}

69
spring-webmvc/src/main/java/org/springframework/web/servlet/config/annotation/CorsRegistration.java
View File

@@ -19,20 +19,14 @@ package org.springframework.web.servlet.config.annotation;
import java.util.ArrayList;
import java.util.Arrays;
import org.springframework.http.HttpMethod;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.cors.CorsConfiguration;
/**
* {@code CorsRegistration} assists with the creation of a
* {@link CorsConfiguration} instance mapped to a path pattern.
* {@code CorsRegistration} assists with the creation of a {@link CorsConfiguration}
* instance mapped to a path pattern.
*
* <p>If no path pattern is specified, cross-origin request handling is
* mapped to {@code "/**"}.
*
* <p>By default, all origins, all headers, credentials and {@code GET},
* {@code HEAD}, and {@code POST} methods are allowed, and the max age is
* set to 30 minutes.
* <p>By default, all origins, headers, credentials and {@code GET}, {@code HEAD}, and
* {@code POST} methods are allowed, and the max age is set to 30 minutes.
*
* @author Sebastien Deleuze
* @author Sam Brannen
@@ -47,43 +41,84 @@ public class CorsRegistration {
private final CorsConfiguration config;
/**
* Create a new {@link CorsRegistration} instance with all origins, headers, credentials
* and {@code GET}, {@code HEAD}, and {@code POST} methods allowed, and the max age
* set to 30 minutes on the specified path.
* @param pathPattern the path where the CORS configuration should apply. Exact path
* mapping URIs (such as {@code "/admin"}) are supported as well as Ant-style path
* patterns (such as {@code "/admin/**"}).
*/
public CorsRegistration(String pathPattern) {
this.pathPattern = pathPattern;
// Same implicit default values as the @CrossOrigin annotation + allows simple methods
this.config = new CorsConfiguration();
this.config.setAllowedOrigins(Arrays.asList(CrossOrigin.DEFAULT_ORIGINS));
this.config.setAllowedMethods(Arrays.asList(HttpMethod.GET.name(),
HttpMethod.HEAD.name(), HttpMethod.POST.name()));
this.config.setAllowedHeaders(Arrays.asList(CrossOrigin.DEFAULT_ALLOWED_HEADERS));
this.config.setAllowCredentials(CrossOrigin.DEFAULT_ALLOW_CREDENTIALS);
this.config.setMaxAge(CrossOrigin.DEFAULT_MAX_AGE);
this.config = new CorsConfiguration().applyDefaultPermitConfiguration();
}
/**
* Set the origins to allow, e.g. {@code "http://domain1.com"}.
* <p>The special value {@code "*"} allows all domains.
* <p>By default, all origins are allowed.
*/
public CorsRegistration allowedOrigins(String... origins) {
this.config.setAllowedOrigins(new ArrayList<>(Arrays.asList(origins)));
return this;
}
/**
* Set the HTTP methods to allow, e.g. {@code "GET"}, {@code "POST"},
* {@code "PUT"}, etc.
* <p>The special value {@code "*"} allows all methods.
* <p>By default, simple methods ({@code GET}, {@code HEAD}, and {@code POST}) are allowed.
*/
public CorsRegistration allowedMethods(String... methods) {
this.config.setAllowedMethods(new ArrayList<>(Arrays.asList(methods)));
return this;
}
/**
* Set the list of headers that a pre-flight request can list as allowed
* for use during an actual request.
* <p>The special value {@code "*"} allows actual requests to send any
* header.
* <p>A header name is not required to be listed if it is one of:
* {@code Cache-Control}, {@code Content-Language}, {@code Expires},
* {@code Last-Modified}, or {@code Pragma}.
* <p>By default, all headers are allowed.
*/
public CorsRegistration allowedHeaders(String... headers) {
this.config.setAllowedHeaders(new ArrayList<>(Arrays.asList(headers)));
return this;
}
/**
* Set the list of response headers other than simple headers (i.e.
* {@code Cache-Control}, {@code Content-Language}, {@code Content-Type},
* {@code Expires}, {@code Last-Modified}, or {@code Pragma}) that an
* actual response might have and can be exposed.
* <p>Note that {@code "*"} is not a valid exposed header value.
* <p>By default this is not set.
*/
public CorsRegistration exposedHeaders(String... headers) {
this.config.setExposedHeaders(new ArrayList<>(Arrays.asList(headers)));
return this;
}
/**
* Configure how long, in seconds, the response from a pre-flight request
* can be cached by clients.
* <p>By default, this is set to 1800 seconds (30 minutes).
*/
public CorsRegistration maxAge(long maxAge) {
this.config.setMaxAge(maxAge);
return this;
}
/**
* Whether user credentials are supported.
* <p>By default, this is set to {@code true} (i.e. user credentials are supported).
*/
public CorsRegistration allowCredentials(boolean allowCredentials) {
this.config.setAllowCredentials(allowCredentials);
return this;

15
spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/annotation/RequestMappingHandlerMapping.java
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@@ -18,7 +18,6 @@ package org.springframework.web.servlet.mvc.method.annotation;
import java.lang.reflect.AnnotatedElement;
import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.List;
import java.util.Set;
import javax.servlet.http.HttpServletRequest;
@@ -305,24 +304,12 @@ public class RequestMappingHandlerMapping extends RequestMappingInfoHandlerMappi
updateCorsConfig(config, typeAnnotation);
updateCorsConfig(config, methodAnnotation);
if (CollectionUtils.isEmpty(config.getAllowedOrigins())) {
config.setAllowedOrigins(Arrays.asList(CrossOrigin.DEFAULT_ORIGINS));
}
if (CollectionUtils.isEmpty(config.getAllowedMethods())) {
for (RequestMethod allowedMethod : mappingInfo.getMethodsCondition().getMethods()) {
config.addAllowedMethod(allowedMethod.name());
}
}
if (CollectionUtils.isEmpty(config.getAllowedHeaders())) {
config.setAllowedHeaders(Arrays.asList(CrossOrigin.DEFAULT_ALLOWED_HEADERS));
}
if (config.getAllowCredentials() == null) {
config.setAllowCredentials(CrossOrigin.DEFAULT_ALLOW_CREDENTIALS);
}
if (config.getMaxAge() == null) {
config.setMaxAge(CrossOrigin.DEFAULT_MAX_AGE);
}
return config;
return config.applyDefaultPermitConfiguration();
}
private void updateCorsConfig(CorsConfiguration config, CrossOrigin annotation) {