Use json as sync exchange format

This allows us to easily transmit headers too. I kind of tried to
rebuild the node response object to reduce changes on any other code.

Author: Sebmaster

lib/XMLHttpRequest.js

@@ -466,15 +466,15 @@ exports.XMLHttpRequest = function() {
         + "  responseText += chunk;"
         + "});"
         + "response.on('end', function() {"
-        + "fs.writeFileSync('" + contentFile + "', 'NODE-XMLHTTPREQUEST-STATUS:' + response.statusCode + ',' + responseText, 'utf8');"
+        + "fs.writeFileSync('" + contentFile + "', JSON.stringify({err: null, data: {statusCode: response.statusCode, headers: response.headers, text: responseText}}), 'utf8');"
         + "fs.unlinkSync('" + syncFile + "');"
         + "});"
         + "response.on('error', function(error) {"
-        + "fs.writeFileSync('" + contentFile + "', 'NODE-XMLHTTPREQUEST-ERROR:' + JSON.stringify(error), 'utf8');"
+        + "fs.writeFileSync('" + contentFile + "', JSON.stringify({err: error}), 'utf8');"
         + "fs.unlinkSync('" + syncFile + "');"
         + "});"
         + "}).on('error', function(error) {"
-        + "fs.writeFileSync('" + contentFile + "', 'NODE-XMLHTTPREQUEST-ERROR:' + JSON.stringify(error), 'utf8');"
+        + "fs.writeFileSync('" + contentFile + "', JSON.stringify({err: error}), 'utf8');"
         + "fs.unlinkSync('" + syncFile + "');"
         + "});"
         + (data ? "req.write('" + data.replace(/'/g, "\\'") + "');":"")
@@ -485,19 +485,19 @@ exports.XMLHttpRequest = function() {
       while(fs.existsSync(syncFile)) {
         // Wait while the sync file is empty
       }
-      self.responseText = fs.readFileSync(contentFile, 'utf8');
+      var resp = JSON.parse(fs.readFileSync(contentFile, 'utf8'));
       // Kill the child process once the file has data
       syncProc.stdin.end();
       // Remove the temporary file
       fs.unlinkSync(contentFile);
-      if (self.responseText.match(/^NODE-XMLHTTPREQUEST-ERROR:/)) {
-        // If the file returned an error, handle it
-        var errorObj = self.responseText.replace(/^NODE-XMLHTTPREQUEST-ERROR:/, "");
-        self.handleError(errorObj);
+
+      console.log(self.responseText);
+      if (resp.err) {
+        self.handleError(resp.err);
       } else {
-        // If the file returned okay, parse its data and move to the DONE state
-        self.status = parseInt(self.responseText.replace(/^NODE-XMLHTTPREQUEST-STATUS:([0-9]*),.*/, "$1"), 10);
-        self.responseText = self.responseText.replace(/^NODE-XMLHTTPREQUEST-STATUS:[0-9]*,(.*)/, "$1");
+        response = resp.data;
+        self.status = resp.data.statusCode;
+        self.responseText = resp.data.text;
         setState(self.DONE);
       }
     }