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GH-1021: Add Request Line override documentation #1056

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Aug 30, 2019
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GH-1021: Add Request Line override documentation #1056

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13 changes: 13 additions & 0 deletions README.md
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Expand Up @@ -74,6 +74,19 @@ should work. Feign's default contract defines the following annotations:
| `@HeaderMap` | Parameter | Defines a `Map` of name-value pairs, to expand into `Http Headers` |
| `@Body` | Method | Defines a `Template`, similar to a `UriTemplate` and `HeaderTemplate`, that uses `@Param` annotated values to resolve the corresponding `Expressions`.|


> **Overriding the Request Line**
>
> If there is a need to target a request to a different host then the one supplied when the Feign client was created, or
> you want to supply a target host for each request, include a `java.net.URI` parameter and Feign will use that value
> as the request target.
>
> ```java
> @RequestLine("POST /repos/{owner}/{repo}/issues")
> void createIssue(URI host, Issue issue, @Param("owner") String owner, @Param("repo") String repo);
> ```
>

### Templates and Expressions

Feign `Expressions` represent Simple String Expressions (Level 1) as defined by [URI Template - RFC 6570](https://tools.ietf.org/html/rfc6570). `Expressions` are expanded using
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