HttpURLConnection将我的POST请求重定向到GET [英] HttpURLConnection redirects my POST request into a GET
问题描述
我要发送带有setInstanceFollowRedirects(true)
和POST
的HttpURLConnection
,获得如下所示的重定向响应:
I'm sending a HttpURLConnection
with setInstanceFollowRedirects(true)
and POST
, get a redirect response that looks like this:
HTTP/1.1 302 Found
Server: nginx
Date: Wed, 09 Jan 2013 20:47:56 GMT
Content-Type: text/html; charset=utf-8
Transfer-Encoding: chunked
Connection: keep-alive
Status: 302 Found
Status: 301 Moved Permanently
Location: http://foo.bar/...
并且JVM发送的下一个请求是GET
请求(发送到正确的重定向URL).似乎也删除了我添加到原始请求中的HTTP标头之一.
And the next request that the JVM sends is a GET
request (to the correct, redirected URL). It also seems to drop one of the HTTP headers I added to the original request.
仅供参考,我不是直接使用HttpURLConnection
,而是通过Play Framework的WS包装器.
FYI, I'm not using HttpURLConnection
directly, but rather through Play Framework's WS wrapper.
我的问题是-这是Java(Sun JVM 1.7.0)的已知问题吗?还是可能是Play框架中的错误?
My question is - is this a known issue with Java (Sun JVM 1.7.0)? Or could it be a bug in Play Framework?
推荐答案
这是Java的默认行为.您可以通过设置系统属性http.strictPostRedirect = true来更改它.
This is the default behavior of Java. You can change it by setting the system property http.strictPostRedirect=true.
For details, please see this quote from the Java source HttpURLConnection implementation source:
/* The HTTP/1.1 spec says that a redirect from a POST
* *should not* be immediately turned into a GET, and
* that some HTTP/1.0 clients incorrectly did this.
* Correct behavior redirects a POST to another POST.
* Unfortunately, since most browsers have this incorrect
* behavior, the web works this way now. Typical usage
* seems to be:
* POST a login code or passwd to a web page.
* after validation, the server redirects to another
* (welcome) page
* The second request is (erroneously) expected to be GET
*
* We will do the incorrect thing (POST-->GET) by default.
* We will provide the capability to do the "right" thing
* (POST-->POST) by a system property, "http.strictPostRedirect=true"
*/
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