java http proxy - Java / JavaÏà¹Ø

InputStream is = null;
OutputStream os = null;
StringBuffer sb = new StringBuffer();
HashMap<String, String> headers = new HashMap<String, String>();
int size = -1;
String head_line = null;
try {
socket.setSoTimeout(20000);
is = socket.getInputStream();
os = socket.getOutputStream();
// PrintWriter out = new PrintWriter(os);
PrintStream out = new PrintStream(os, true);
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);

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head_line = br.readLine();
sb.append(head_line + "\r\n");
String method = this.getMethod(head_line);
String protocol = this.getProtocol(head_line);
boolean loop = true;
int contentLength = -1;
while (loop) {
if (br.ready()) {
String i = br.readLine();
while (!i.trim().equals("")) {
String[] strs = i.split(":");
headers.put(strs[0].trim(), strs[1].trim());
sb.append(i + "\r\n");
i = br.readLine();
if (i.trim().startsWith("Content-Length")) {
contentLength = Integer.parseInt(i.substring(
i.indexOf(':') + 1).trim());
}
}
loop = false;
}
}

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StringBuffer post_data = new StringBuffer();
for (int i = 0; i < contentLength; i++) {
i