java - cURL 有效，但 Apache 的 HttpComponents 库中的相同请求不起作用？

Question

为了这个小问题，我几天来一直在焦头烂额。希望这里有人可以发现我的错误(因为我确定这是我的错误)并给我一些关于如何补救它的要点。如果我的解释失败，请告诉我，我会尝试以更简洁的方式重写它。

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一些背景知识:作为一个小型副项目的一部分，我一直在编写一个 Java 应用程序来监视浏览器内游戏发送的聊天和事件数据(供引用；Command & Conquer: Tiberium Alliances)。可悲的是，关于他们的网络服务如何工作的文档并不多，但我设法拼凑了一系列请求(基于观察网络流量和其他开发人员发布的代码示例)来处理登录等。

一个特定的请求绝对拒绝完成，Java 在暂停 30 秒后抛出连接重置异常。以下是此特定请求的连接日志。

 2014/03/25 11:17:16:703 EDT [DEBUG] RequestAddCookies - CookieSpec selected: best-match
 2014/03/25 11:17:16:703 EDT [DEBUG] RequestAuthCache - Auth cache not set in the context
 2014/03/25 11:17:16:703 EDT [DEBUG] PoolingHttpClientConnectionManager - Connection request: [route: {s}->https://gamecdnorigin.alliances.commandandconquer.com:443][total kept alive: 1; route allocated: 0 of 2; total allocated: 1 of 20]
 2014/03/25 11:17:16:703 EDT [DEBUG] PoolingHttpClientConnectionManager - Connection leased: [id: 2][route: {s}->https://gamecdnorigin.alliances.commandandconquer.com:443][total kept alive: 1; route allocated: 1 of 2; total allocated: 2 of 20]
 2014/03/25 11:17:16:703 EDT [DEBUG] MainClientExec - Opening connection {s}->https://gamecdnorigin.alliances.commandandconquer.com:443
 2014/03/25 11:17:16:755 EDT [DEBUG] HttpClientConnectionOperator - Connecting to gamecdnorigin.alliances.commandandconquer.com/212.100.228.211:443
 *snip: 30 seconds of junk output*
 2014/03/25 11:18:16:992 EDT [DEBUG] DefaultManagedHttpClientConnection - http-outgoing-2: Shutdown connection
 2014/03/25 11:18:16:992 EDT [DEBUG] MainClientExec - Connection discarded
 2014/03/25 11:18:16:993 EDT [DEBUG] DefaultManagedHttpClientConnection - http-outgoing-2: Close connection
 2014/03/25 11:18:16:993 EDT [DEBUG] PoolingHttpClientConnectionManager - Connection released: [id: 2][route: {s}->https://gamecdnorigin.alliances.commandandconquer.com:443][total kept alive: 1; route allocated: 0 of 2; total allocated: 1 of 20]
 2014/03/25 11:18:16:993 EDT [INFO] RetryExec - I/O exception (java.net.SocketException) caught when processing request to {s}->https://gamecdnorigin.alliances.commandandconquer.com:443: Connection reset
 2014/03/25 11:18:16:993 EDT [DEBUG] RetryExec - Connection reset <java.net.SocketException: Connection reset>java.net.SocketException: Connection reset
    at java.net.SocketInputStream.read(SocketInputStream.java:189)
    at java.net.SocketInputStream.read(SocketInputStream.java:121)
    at sun.security.ssl.InputRecord.readFully(InputRecord.java:465)
    at sun.security.ssl.InputRecord.read(InputRecord.java:503)
    at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:954)
    at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1343)
    at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1371)
    at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1355)
    at org.apache.http.conn.ssl.SSLConnectionSocketFactory.createLayeredSocket(SSLConnectionSocketFactory.java:275)
    at org.apache.http.conn.ssl.SSLConnectionSocketFactory.connectSocket(SSLConnectionSocketFactory.java:254)
    at org.apache.http.impl.conn.HttpClientConnectionOperator.connect(HttpClientConnectionOperator.java:117)
    at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:314)
    at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:363)
    at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:219)
    at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:195)
    at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:86)
    at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:108)
    at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:186)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:106)
 *snip: lots of extra backtrace*

很多，我知道:/

奇怪的是，使用 PHP 的 cURL 运行完全相同的请求工作得很好，而且我得到了我期望的信息。以下是发送失败请求的 Java 以及成功完成的 PHP 的代码片段。

Java:

public static boolean loadWorlds(Session session) {
    HttpPost post = new HttpPost("https://gamecdnorigin.alliances.commandandconquer.com/Farm/Service.svc/ajaxEndpoint/GetOriginAccountInfo");
    HttpEntity entity = new StringEntity(String.format("{\"session\":\"%s\"}", session.getId()), ContentType.APPLICATION_JSON);

    post.setHeader("Content-Type", "application/json; charset=utf-8");
    post.setHeader("X-Qooxdoo-Response-Type", "application/json");
    post.setHeader("Cache-Control", "no-cache");
    post.setHeader("Pragma", "no-cache");
    post.setEntity(entity);

    try {
        CloseableHttpResponse resp = ApiCommunicator.getHttpClient().execute(post);

        System.out.println(EntityUtils.toString(resp.getEntity()));
    } catch (Exception e) {
        e.printStackTrace();
    }

    return true;
}

通过 PHP 的 cURL:

<?php
    $cookie = 'cookies/' . md5($user) . '.txt';
    $data = array(
        'session' => 'hidden :P'
    );

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, 'https://gamecdnorigin.alliances.commandandconquer.com/Farm/Service.svc/ajaxEndpoint/GetOriginAccountInfo');
    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 2);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_HTTPHEADER, array(
        "Content-Type: application/json; charset=utf-8",
        "Cache-Control: no-cache",
        "Pragma: no-cache",
        "X-Qooxdoo-Response-Type: application/json"
    ));
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data));
    curl_setopt($ch, CURLOPT_COOKIEFILE, $cookie);
    curl_setopt($ch, CURLOPT_COOKIEJAR, $cookie);

    $result = curl_exec($ch);
?>

为了使这篇文章尽可能短(因为它已经是一堵令人痛苦的长文本墙)我稍微重写了 PHP 以显示 $cookie 和 $data 的值，因为两者都在脚本的进一步设置执行。

如有任何帮助，我们将不胜感激。我不知道 HttpComponents 是否向请求添加或删除 header 数据(我确实是在 2 天前开始学习这个库的，当时我选择了这个项目)而 cURL 不会。如有必要，我可以发布更多代码示例，因为除了从服务器返回的我的个人登录/ session 信息之类的东西之外，这个项目中没有什么是真正“ secret ”的。另外，这是我第一次来这里 D: 所以如果我的格式不正确或者我的代码片段没有正确突出显示，请告诉我，我会尽力修复它:)

Answer 1

尝试通过关闭您获得的 Closable 实例来关闭底层连接。

CloseableHttpResponse resp = ApiCommunicator.getHttpClient().execute(post);
try {
        System.out.println(EntityUtils.toString(resp.getEntity()));
    } catch (Exception e) {
        e.printStackTrace();
    }
    finally{
       resp.close();
    }