SpringCloud/spring-cloud-openfeign
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Zuul Developer Guide: minor edits

Browse Source
This commit is contained in:
Ben Klein
2017-02-08 21:20:16 -06:00
committed by GitHub
parent 675e4c1031
commit 8afb02cf03
1 changed files with 7 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
docs/src/main/asciidoc/spring-cloud-netflix.adoc
View File

@@ -1799,22 +1799,22 @@ Error filters:
Creates a `DiscoveryClientRouteLocator` that loads route definitions from a `DiscoveryClient` (like Eureka), as well as from properties. A route is created for each `serviceId` from the `DiscoveryClient`. As new services are added, the routes will be refreshed.
In addition to the filters describe above, the following filters are installed (as normal Spring Beans):
In addition to the filters described above, the following filters are installed (as normal Spring Beans):
Pre filters:
- `PreDecorationFilter`: This filter determines where and how to route based on the supplied `RouteLocator`. It also sets various proxy related headers for downstream requests.
- `PreDecorationFilter`: This filter determines where and how to route based on the supplied `RouteLocator`. It also sets various proxy-related headers for downstream requests.
Route filters:
- `RibbonRoutingFilter`: This filter uses Ribbon, Hystrix and pluggable http clients to send requests. Service ids are found in the `RequestContext` attribute `FilterConstants.SERVICE_ID_KEY`.
- Describe different ribbon http clients
- `RibbonRoutingFilter`: This filter uses Ribbon, Hystrix and pluggable HTTP clients to send requests. Service ids are found in the `RequestContext` attribute `FilterConstants.SERVICE_ID_KEY`.
- Describe different Ribbon HTTP clients
- `SimpleHostRoutingFilter`: This filter sends requests to predetermined URLs via an Apache HttpClient. URLs are found in `RequestContext.getRouteHost()`.
==== How to Write a Pre Filter
Pre filters are used to setup data in the `RequestContext` for use in filters downstream. The main use case is to set information required for route filters`
Pre filters are used to set up data in the `RequestContext` for use in filters downstream. The main use case is to set information required for route filters.
[source,java]
----
@@ -1935,11 +1935,11 @@ public class OkHttpRoutingFilter extends ZuulFilter {
}
----
The above filter translates Servlet request information into OkHttp3 request information, executes an http request, then translates OkHttp3 reponse information to the Servlet response. WARNING: this filter might have bugs and not function correctly.
The above filter translates Servlet request information into OkHttp3 request information, executes an HTTP request, then translates OkHttp3 reponse information to the Servlet response. WARNING: this filter might have bugs and not function correctly.
==== How to Write a Post Filter
Post filters typically manipulate the response. In the filter below, we add a random `UUID` as the `X-Foo` header. Other manipulations, such as transforming the response body are much more complex and compute intensive.
Post filters typically manipulate the response. In the filter below, we add a random `UUID` as the `X-Foo` header. Other manipulations, such as transforming the response body, are much more complex and compute-intensive.
[source,java]
----