/**
* POSTs the given content to the given URL.
*
* @param String the url to post to
* @param content the body of the post
* @param contentType the content-type of the request
* @exception IOException if post fails
*/
public static String post(String urlString, String contentType, String content)
throws IOException {
Debug.log(
Debug.MSG_LIFECYCLE,
"HTTPUtils: Trying to post " + content + " to web server at [ " + urlString + "]");
StringBuffer responseBuffer = new StringBuffer();
URL url = new URL(urlString);
ClientSocket cs = new ClientSocket();
HTTPUtils.Response resp = post(cs, url, new Hashtable(), contentType, content);
while (true) {
String line = resp.content.readLine();
if (line == null) break;
responseBuffer.append(line);
}
Debug.log(
Debug.MSG_LIFECYCLE,
"HTTPUtils: Obtained response from web server : " + responseBuffer.toString());
cleanUp(cs);
return responseBuffer.toString();
}
/**
* Close all IO connections that were opened during post()
*
* @param cs Client socket items to populate.
*/
private static void cleanUp(ClientSocket cs) throws IOException {
Debug.log(Debug.MSG_LIFECYCLE, "HTTPUtils: closing IO socket connections");
if (cs.in != null) {
try {
cs.in.close();
cs.in = null;
} catch (Exception e) {
Debug.log(Debug.ALL_WARNINGS, e.toString());
}
}
if (cs.out != null) {
try {
cs.out.close();
cs.out = null;
} catch (Exception e) {
Debug.log(Debug.ALL_WARNINGS, e.toString());
}
}
if (cs.s != null) {
try {
cs.s.close();
cs.s = null;
} catch (Exception e) {
Debug.log(Debug.ALL_WARNINGS, e.toString());
}
}
}
/**
* POST something to the given URL. The headers are put in as HTTP headers, the content length is
* calculated and the content is sent as content. Duh.
*
* @param cs Client socket items.
* @param url the url to post to
* @param headers additional headers to send as HTTP headers
* @param contentType type of the content
* @param content the body of the post
* @exception IOException if post fails
*/
private static Response post(
ClientSocket cs, URL url, Hashtable headers, String contentType, String content)
throws IOException {
// If the port is not specified in the URL, use the default http port.
int port = url.getPort();
if (port == -1) port = 80;
cs.s = new Socket(url.getHost(), +port);
cs.out = new PrintWriter(cs.s.getOutputStream());
cs.in = new BufferedReader(new InputStreamReader(cs.s.getInputStream()));
// Create the HTTP header
cs.out.print(HTTP_POST + " " + url.getFile() + " HTTP/" + HTTP_VERSION + "\r\n");
cs.out.print(HEADER_HOST + ": " + url.getHost() + ':' + port + "\r\n");
cs.out.print(HEADER_CONTENT_TYPE + ": " + contentType + "\r\n");
cs.out.print(HEADER_CONTENT_LENGTH + ": " + content.length() + "\r\n");
for (Enumeration e = headers.keys(); e.hasMoreElements(); ) {
Object key = e.nextElement();
cs.out.print(key + ": " + headers.get(key) + "\r\n");
}
// According to HTTP1.1 need another CRLF after the header
cs.out.print("\r\n");
Debug.log(Debug.MSG_LIFECYCLE, "HTTPUtils: Writing content to the socket... " + content);
cs.out.println(content);
cs.out.flush();
/* read the status line */
int statusCode = 0;
String statusString = null;
StringTokenizer st = new StringTokenizer(cs.in.readLine());
st.nextToken(); // ignore version part
statusCode = Integer.parseInt(st.nextToken());
StringBuffer sb = new StringBuffer();
while (st.hasMoreTokens()) {
sb.append(st.nextToken());
if (st.hasMoreTokens()) sb.append(" ");
}
statusString = sb.toString();
/* get the headers */
Hashtable respHeaders = new Hashtable();
int respContentLength = -1;
String respContentType = null;
String line = null;
while ((line = cs.in.readLine()) != null) {
if (line.length() == 0) break;
int colonIndex = line.indexOf(':');
String fieldName = line.substring(0, colonIndex);
String fieldValue = line.substring(colonIndex + 1).trim();
if (fieldName.equals(HEADER_CONTENT_LENGTH)) respContentLength = Integer.parseInt(fieldValue);
else if (fieldName.equals(HEADER_CONTENT_TYPE)) respContentType = fieldValue;
else respHeaders.put(fieldName, fieldValue);
}
Response response =
new Response(
statusCode, statusString, respHeaders, respContentLength, respContentType, cs.in);
return response;
}