java - 使用 REST 重定向 URL 的最佳方法

Question

谁能建议我在以下两种方式中使用 REST 重定向 URL 的最佳方法:

1. httpResponse.sendRedirect("URL");
2. Response.temporaryRedirect(new URI("path"));

Answer 1

有几种类型的重定向

根据RFC 7231 ，目前对HTTP/1.1的语义和内容的引用，有several types of redirects .他们都是

1. Redirects that indicate the resource might be available at a different URI, as provided by the Location field, as in the status codes 301 (Moved Permanently), 302 (Found), and 307 (Temporary Redirect).

2. Redirection that offers a choice of matching resources, each capable of representing the original request target, as in the 300 (Multiple Choices) status code.

3. Redirection to a different resource, identified by the Location field, that can represent an indirect response to the request, as in the 303 (See Other) status code.

4. Redirection to a previously cached result, as in the 304 (Not Modified) status code.

正确的取决于您的需要。然而，这些是最常见的:

6.4.2. 301 Moved Permanently

The 301 (Moved Permanently) status code indicates that the target resource has been assigned a new permanent URI and any future references to this resource ought to use one of the enclosed URIs. [...]

6.4.4. 303 See Other

The 303 (See Other) status code indicates that the server is redirecting the user agent to a different resource, as indicated by a URI in the Location header field, which is intended to provide an indirect response to the original request. [...]

6.4.7. 307 Temporary Redirect

The 307 (Temporary Redirect) status code indicates that the target resource resides temporarily under a different URI and the user agent MUST NOT change the request method if it performs an automatic redirection to that URI. [...]

在 JAX-RS 中执行重定向

根据您在问题中发布的代码，我相信您使用的是 JAX-RS应用程序接口(interface)。如果是这样，您可以按如下方式执行重定向:

• 301 Moved Permanently :

URI uri = ...
return Response.status(Status.MOVED_PERMANENTLY).location(uri).build();

• 303 See Other (又名 POST/重定向/GET):

URI uri = ...
return Response.seeOther(uri).build();

• 307 Temporary Redirect :

URI uri = ...
return Response.temporaryRedirect(uri).build();

有关更多详细信息，Response类文档可能会有用。

在使用 JAX-RS 时可能有用的其他细节

您还可以注入(inject) UriInfo在您的 REST 端点中:

@Context
UriInfo uriInfo;

并得到一些有用的信息，比如base URI和 absolute path of the request .这在构建用于重定向的 URI 时很有用。

带有重定向的资源方法如下:

@Path("/foo")
public class MyEndpoint {

    @Context
    private UriInfo uriInfo;

    @POST
    @Produces(MediaType.APPLICATION_JSON)
    public Response myMethod() {
        URI uri = uriInfo.getBaseUriBuilder().path("bar").build();
        return Response.temporaryRedirect(uri).build();
    }
}