Function readFromSocket

v1/app/background.js:81–204

(socketId)

};

var readFromSocket = function(socketId) {

  var headers = '';
  var content = '';
  var totalContentLength;
  var contentLengthSoFar;

  // get the first chunk
  socket.read(socketId, function(readInfo) {
    var data = arrayBufferToString(readInfo.data);
    // the chrome socket read API only calls the callback if there's data, so we
    // need to keep reading until content length is satisfied to know we're done
    var headerEndLoc = data.indexOf("\r\n\r\n");
    headers = data.substring(0, headerEndLoc)
    content = data.substring(headerEndLoc + 4);

    if (content.length == 0) {
      handleRequest(headers);
    } else {
      // no unicode in the headers, so assume char == byte
      contentLengthSoFar = readInfo.resultCode - headers.length - 4;
      var lengthLoc = headers.indexOf("\nContent-Length: ");
      var lengthEnd = data.indexOf("\r\n", lengthLoc);
      totalContentLength = parseInt(
          data.substring(lengthLoc + 16, lengthEnd), 10);
      readChunk();
    }
  });

  function readChunk() {
    if (totalContentLength == contentLengthSoFar) {
      handleRequest(headers, content);
    } else {
      socket.read(socketId, function(readInfo) {
        content += arrayBufferToString(readInfo.data);
        contentLengthSoFar += readInfo.resultCode;
        readChunk();
      });
    }
  }

  function handleRequest(headers, content) {
    var methodEnd = headers.indexOf(" ");
    var uriEnd = headers.indexOf(" ", methodEnd + 1);
    var method = headers.substring(0, methodEnd);
    var uri = headers.substring(methodEnd + 1, uriEnd);
    var R = /^Origin: chrome-extension:\/\/hifhgpdkfodlpnlmlnmhchnkepplebkb\r?$/;
    var valid = headers.split('\n').some(function(header) {
      return !!header.match(R);
    });

    if (method == 'GET') {
      // handle "hello" requests
      if (uri == '/hello') {
        sendResponse(socketId, 'Hello');
      } else {
        sendResponse(socketId, 'I have no idea what you\'re talking about');
      }