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HttpSocketHandler.java
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/
HttpSocketHandler.java
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/*
* weinre is available under *either* the terms of the modified BSD license *or* the
* MIT License (2008). See http://opensource.org/licenses/alphabetical for full text.
*
* Copyright (c) 2010, 2011 IBM Corporation
*/
package weinre.server.http;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.util.List;
import javax.management.RuntimeErrorException;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.wink.json4j.JSONArray;
import org.apache.wink.json4j.JSONException;
import org.apache.wink.json4j.JSONObject;
import org.eclipse.jetty.server.Request;
import org.eclipse.jetty.server.handler.AbstractHandler;
import weinre.server.Channel;
import weinre.server.ChannelManager;
import weinre.server.Main;
import weinre.server.Utility;
//-------------------------------------------------------------------
public class HttpSocketHandler extends AbstractHandler {
private String pathPrefix;
private int pathPrefixParts;
//---------------------------------------------------------------
public HttpSocketHandler(String pathPrefix) {
super();
this.pathPrefix = pathPrefix;
this.pathPrefixParts = pathPrefix.split("/").length;
}
//---------------------------------------------------------------
@Override
public void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
// ! * pathPrefix*
if (!target.startsWith(pathPrefix)) return;
String method = baseRequest.getMethod();
setCORSHeaders(response);
setCacheHeaders(response);
// OPTIONS pathPrefix
if (target.equals(pathPrefix) && method.equals("OPTIONS")) {
baseRequest.setHandled(true);
handleOptions(target, baseRequest, request, response);
return;
}
// POST pathPrefix
if (target.equals(pathPrefix) && method.equals("POST")) {
baseRequest.setHandled(true);
handleCreate(target, baseRequest, request, response);
return;
}
// * pathPrefix
if (target.equals(pathPrefix)) {
baseRequest.setHandled(true);
response.sendError(405);
return;
}
// * pathPrefix/x/*
String[] parts = target.split("/");
if (parts.length != pathPrefixParts + 1) {
baseRequest.setHandled(true);
response.sendError(404);
}
//
if (parts.length <= pathPrefixParts) {
baseRequest.setHandled(true);
response.sendError(405);
}
String channel = parts[pathPrefixParts];
// OPTIONS pathPrefix/x
if (method.equals("OPTIONS")) {
baseRequest.setHandled(true);
handleOptions(target, baseRequest, request, response);
return;
}
// GET pathPrefix/x
if (method.equals("GET")) {
baseRequest.setHandled(true);
handleGet(channel, target, baseRequest, request, response);
return;
}
// POST pathPrefix/x
if (method.equals("POST")) {
baseRequest.setHandled(true);
handlePost(channel, target, baseRequest, request, response);
return;
}
// * pathPrefix/x
baseRequest.setHandled(true);
response.sendError(405);
}
//---------------------------------------------------------------
private void setCORSHeaders(HttpServletResponse response) {
response.setHeader("Access-Control-Allow-Origin", "*");
response.setHeader("Access-Control-Max-Age", "600");
response.setHeader("Access-Control-Allow-Methods", "GET, POST");
}
//---------------------------------------------------------------
private void setCacheHeaders(HttpServletResponse response) {
response.setHeader("Pragma", "no-cache");
response.setHeader("Expires", "0");
response.setHeader("Cache-Control", "no-cache");
response.setHeader("Cache-Control", "no-store");
}
//---------------------------------------------------------------
public void handleOptions(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
response.setStatus(200);
response.setContentType("text/plain");
}
//---------------------------------------------------------------
public void handleCreate(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
String channelName = "" + Utility.getNextSequenceNumber();
String id;
if (0 == baseRequest.getContentLength()) {
id = Channel.AnonymousId;
}
else {
try {
String json = readRequestBody(request.getInputStream());
JSONObject obj = new JSONObject(json);
if (!obj.has("id")) {
id = Channel.AnonymousId;
}
else {
id = obj.getString("id");
if (id.isEmpty()) {
id = Channel.AnonymousId;
}
}
}
catch (IOException e) {
response.setStatus(400);
return;
}
catch (JSONException e) {
response.setStatus(400);
return;
}
}
ChannelManager.$.registerChannel(pathPrefix, channelName, id, request.getRemoteHost(), request.getRemoteAddr());
response.setStatus(200);
response.setContentType("application/json");
ServletOutputStream oStream = response.getOutputStream();
JSONObject obj = new JSONObject();
try {
obj.put("channel", channelName);
obj.put("id", id);
}
catch (JSONException e) {
throw new RuntimeException(e);
}
String result = obj.toString();
oStream.print(result);
oStream.close();
}
//---------------------------------------------------------------
public void handleGet(String channelName, String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
Channel channel = ChannelManager.$.getChannel(channelName, request.getRemoteAddr());
if (null == channel) {
response.setStatus(404);
return;
}
channel.updateLastRead();
List<String> json;
try {
json = channel.getResponses(Main.getSettings().getReadTimeoutSeconds());
}
catch (InterruptedException e) {
throw new IOException(e);
}
response.setStatus(200);
response.setContentType("application/json");
ServletOutputStream oStream = response.getOutputStream();
printJSONList(oStream, json);
oStream.close();
}
//---------------------------------------------------------------
private void printJSONList(ServletOutputStream oStream, List<String> json) throws IOException {
try {
oStream.print(new JSONArray(json).toString());
}
catch (JSONException e) {
throw new RuntimeException(e);
}
}
//---------------------------------------------------------------
public void handlePost(String channelName, String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
Channel channel = ChannelManager.$.getChannel(channelName, request.getRemoteAddr());
if (null == channel) {
response.setStatus(404);
return;
}
// if (!"text/plain".equals(baseRequest.getContentType())) {
// response.setStatus(415);
// return;
// }
if (0 == baseRequest.getContentLength()) {
response.setStatus(400);
return;
}
try {
String json = readRequestBody(request.getInputStream());
channel.postRequest(json);
}
catch (IOException e) {
response.setStatus(400);
return;
}
response.setStatus(200);
response.setContentType("text/plain");
response.getOutputStream().close();
}
//---------------------------------------------------------------
private String readRequestBody(InputStream is) throws IOException {
StringBuffer stringBuffer = new StringBuffer();
Reader reader = new InputStreamReader(is, "UTF-8");
char[] buffer = new char[4096];
int read;
while ((read = reader.read(buffer)) > 0) {
stringBuffer.append(buffer, 0, read);
}
return stringBuffer.toString();
}
}