java - 如何保持HttpClient Connection Keep-Alive？

Question

我正在使用 HttpClient POST 方法。我需要创建一次 HttpClient 并且应该使用 Keep Alive Connection。但我认为在我的情况下，它每次都会建立一个新的连接。

因此，我需要为 HttpClient 使用Keep Alive 连接。

这是我的代码 fragment ，如有任何帮助，我们将不胜感激。

ClientConnectionManager mgr = httpclient_recv.getConnectionManager();
    hp = httpclient_recv.getParams();
    httpclient_recv = new DefaultHttpClient(
    new ThreadSafeClientConnManager(hp,mgr.getSchemeRegistry()), hp);

    while (true) {

        try {

            java.util.logging.Logger.getLogger("org.apache.http.wire")
                    .setLevel(java.util.logging.Level.FINER);
            java.util.logging.Logger.getLogger("org.apache.http.headers")
                    .setLevel(java.util.logging.Level.FINER);

            System.setProperty("org.apache.commons.logging.Log",
                    "org.apache.commons.logging.impl.SimpleLog");
            System.setProperty(
                    "org.apache.commons.logging.simplelog.showdatetime",
                    "true");
            System.setProperty(
                    "org.apache.commons.logging.simplelog.log.httpclient.wire",
                    "debug");
            System.setProperty(
                    "org.apache.commons.logging.simplelog.log.org.apache.http",
                    "debug");
            System.setProperty(
                    "org.apache.commons.logging.simplelog.log.org.apache.http.headers",
                    "debug");

            ByteArrayEntity bae = new ByteArrayEntity(byteData);
            bae.setContentType(new BasicHeader(HTTP.CONTENT_TYPE,
                    "binary/octet-stream"));

            httppost_recv.setHeader(HTTP.CONN_DIRECTIVE,HTTP.CONN_KEEP_ALIVE);
            httppost_recv.setEntity(bae);



            {
                System.out.println("res b4 response");
                 response_recv = httpclient_recv
                        .execute(httppost_recv);
                 response_recv.getEntity().consumeContent();
                System.out.println("res a4 response");
                if (response_recv != null) {
                    byteArray = EntityUtils.toByteArray(response_recv
                            .getEntity());
                    playing  = true;
                }
                        }
                 }

还有 logcat 日志是:

12-03 10:07:29.466: I/System.out(1529): res b4 response
12-03 10:07:29.646: D/org.apache.http.wire(1529): >> "POST /ping HTTP/1.1[EOL]"
12-03 10:07:29.666: D/org.apache.http.wire(1529): >> "Connection: Keep-Alive[EOL]"
12-03 10:07:29.686: D/org.apache.http.wire(1529): >> "Content-Length: 1[EOL]"
12-03 10:07:29.705: D/org.apache.http.wire(1529): >> "Content-Type: binary/octet-stream[EOL]"
12-03 10:07:29.716: D/org.apache.http.wire(1529): >> "Host: 192.168.1.36[EOL]"
12-03 10:07:29.725: D/org.apache.http.wire(1529): >> "User-Agent: Apache-HttpClient/UNAVAILABLE (java 1.4)[EOL]"
12-03 10:07:29.736: D/org.apache.http.wire(1529): >> "[EOL]"
12-03 10:07:29.746: D/org.apache.http.headers(1529): >> POST /ping HTTP/1.1
12-03 10:07:29.746: D/org.apache.http.headers(1529): >> Connection: Keep-Alive
12-03 10:07:29.756: D/org.apache.http.headers(1529): >> Content-Length: 1
12-03 10:07:29.756: D/org.apache.http.headers(1529): >> Content-Type: binary/octet-stream
12-03 10:07:29.765: D/org.apache.http.headers(1529): >> Host: 192.168.1.36
12-03 10:07:29.765: D/org.apache.http.headers(1529): >> User-Agent: Apache-HttpClient/UNAVAILABLE (java 1.4)
12-03 10:07:29.776: D/org.apache.http.wire(1529): >> "[0x0]"
12-03 10:07:29.796: D/org.apache.http.wire(1529): << "HTTP/1.1 200 OK[EOL]"
12-03 10:07:29.805: D/org.apache.http.wire(1529): << "Server: gSOAP/2.8[EOL]"
12-03 10:07:29.816: D/org.apache.http.wire(1529): << "Content-Type: binary/octet-stream[EOL]"
12-03 10:07:29.826: D/org.apache.http.wire(1529): << "Content-Length: 2048[EOL]"
12-03 10:07:29.836: D/org.apache.http.wire(1529): << **"Connection: close[EOL]"**
12-03 10:07:29.887: D/org.apache.http.headers(1529): << HTTP/1.1 200 OK
12-03 10:07:29.896: D/org.apache.http.headers(1529): << Server: gSOAP/2.8
12-03 10:07:29.896: D/org.apache.http.headers(1529): << Content-Type: binary/octet-stream
12-03 10:07:29.906: D/org.apache.http.headers(1529): << Content-Length: 2048
12-03 10:07:29.906: D/org.apache.http.headers(1529): << **Connection: close**
12-03 10:07:29.916: I/System.out(1529): res a4 response

Answer 1

10:07:29.746: D/org.apache.http.headers(1529): >> Connection: Keep-Alive

您正在请求保活。

10:07:29.836: D/org.apache.http.wire(1529): << "Connection: close[EOL]"

服务器拒绝它。

你对此无能为力。