shanpin
/
chat-server


			
				
					
						
						
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<!doctype html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Socket.IO Chat Example</title>
  <style>/* Fix user-agent */
*{box-sizing:border-box}html{font-family:"HelveticaNeue-Light","Helvetica Neue Light","Helvetica Neue",Helvetica,Arial,"Lucida Grande",sans-serif;font-weight:300;-webkit-font-smoothing:antialiased}html,body{height:100%;margin:0;padding:0}ul{list-style:none}.pages{height:100%;margin:0;padding:0;width:100%}.page{height:100%;position:absolute;width:100%}.login.page{background-color:#000}.login.page .form{height:100px;margin-top:-100px;position:absolute;text-align:center;top:50%;width:100%}.login.page .form .usernameInput{background-color:transparent;border:0;border-bottom:2px solid #fff;outline:0;padding-bottom:15px;text-align:center;width:400px}.login.page .title{font-size:200%}.login.page .usernameInput{font-size:200%;letter-spacing:3px}.login.page .title,.login.page .usernameInput{color:#fff;font-weight:100}.chat.page{display:none}.messages{font-size:150%}.inputMessage{font-size:100%}.log{color:gray;font-size:70%;margin:5px;text-align:center}.chatArea{height:100%;padding-bottom:60px}.messages{height:100%;margin:0;overflow-y:scroll;padding:10px 20px 10px 20px}.message.typing .messageBody{color:gray}.username{float:left;font-weight:700;overflow:hidden;padding-right:15px;text-align:right}.inputMessage{border:10px solid #000;bottom:0;height:60px;left:0;outline:0;padding-left:10px;position:absolute;right:0;width:100%}
  </style>
</head>
<body>
  <ul class="pages">
    <li class="chat page">
      <div class="chatArea">
        <ul class="messages"></ul>
      </div>
      <input class="inputMessage" placeholder="Type here..."/>
    </li>
    <li class="login page">
      <div class="form">
        <h3 class="title">What's your nickname?</h3>
        <input class="usernameInput" type="text" maxlength="14" />
      </div>
    </li>
  </ul>

  <script src="/js/socket.io-1.2.0.js"></script>
  <script src="/js/jquery.js"></script>
  <script src="/js/rpc.js"></script>
  <script>
  //$(function() {
  var FADE_TIME = 150; // ms
  var TYPING_TIMER_LENGTH = 400; // ms
  var COLORS = [
    '#e21400', '#91580f', '#f8a700', '#f78b00',
    '#58dc00', '#287b00', '#a8f07a', '#4ae8c4',
    '#3b88eb', '#3824aa', '#a700ff', '#d300e7'
  ];

  // Initialize varibles
  var $window = $(window);
  var $usernameInput = $('.usernameInput'); // Input for username
  var $messages = $('.messages'); // Messages area
  var $inputMessage = $('.inputMessage'); // Input message input box

  var $loginPage = $('.login.page'); // The login page
  var $chatPage = $('.chat.page'); // The chatroom page

  // Prompt for setting a username
  var username;
  var connected = false;
  var typing = false;
  var lastTypingTime;
  var $currentInput = $usernameInput.focus();

  var rpc_client = new rpc('http://'+window.location.host,{'reconnect':true});

  rpc_client.on('reconnect', function (data) {
          self.location.href = 'http://'+window.location.host;
          });

  rpc_client.on('disconnect', function (data) {
          addChatMessage({"username":"sys tips","message":"disconnect"});
          });
  rpc_client.on('connect_failed', function (data) {
             alert("connect_failed");
          });
  rpc_client.on('reconnect_failed', function (data) {
             alert("reconnect_failed");
          });
  rpc_client.on('error', function (data) {
             alert("error");
          });

  function addParticipantsMessage (data) {
    var message = '';
    if (data.numUsers === 1) {
      message += "there's 1 participant";
    } else {
      message += "there are " + data.numUsers + " participants";
    }
    log(message);
  }

  // Sets the client's username
  function setUsername () {
    username = cleanInput($.trim($usernameInput.val()));
    // If the username is valid
    if (username) {
      $loginPage.fadeOut();
      $chatPage.show();
      $loginPage.off('click');
      $currentInput = $inputMessage.focus();

      // Tell the server your username
      rpc_client.emit('adduser', username);
    }
  }

  // Sends a chat message
  function sendMessage () {
    var message = $inputMessage.val();
    // Prevent markup from being injected into the message
    message = cleanInput(message);
    // if there is a non-empty message and a socket connection
    if (message && connected) {
      $inputMessage.val('');
      addChatMessage({
        username: username,
        message: message
      });
      // tell server to execute 'new message' and send along one parameter
      rpc_client.emit('chat', message);
    }
  }

  // Log a message
  function log (message, options) {
    var $el = $('<li style="display:block"/>').addClass('log').text(message);
    addMessageElement($el, options);
  }

  // Adds the visual chat message to the message list
  function addChatMessage (data, options) {
    // Don't fade the message in if there is an 'X was typing'
    var $typingMessages = getTypingMessages(data);
    options = options || {};
    if ($typingMessages.length !== 0) {
      options.fade = false;
      $typingMessages.remove();
    }

    var $usernameDiv = $('<span class="username" />')
      .text(data.username)
      .css('color', getUsernameColor(data.username));
    var $messageBodyDiv = $('<span class="messageBody" />')
      .text(data.message);

    var typingClass = data.typing ? 'typing' : '';
    var $messageDiv = $('<li class="message"></li>')
      .data('username', data.username)
      .addClass(typingClass);
      
    addMessageElement($messageDiv, options);
    $messageDiv.append($usernameDiv);
    $messageDiv.append($messageBodyDiv);
  }

  // Adds the visual chat typing message
  function addChatTyping (data) {
    data.typing = true;
    data.message = 'is typing';
    addChatMessage(data);
  }

  // Removes the visual chat typing message
  function removeChatTyping (data) {
    getTypingMessages(data).fadeOut(function () {
      $(this).remove();
    });
  }

  // Adds a message element to the messages and scrolls to the bottom
  // el - The element to add as a message
  // options.fade - If the element should fade-in (default = true)
  // options.prepend - If the element should prepend
  //   all other messages (default = false)
  function addMessageElement (el, options) {
    var $el = $(el);

    // Setup default options
    if (!options) {
      options = {};
    }
    if (typeof options.fade === 'undefined') {
      options.fade = true;
    }
    if (typeof options.prepend === 'undefined') {
      options.prepend = false;
    }

    // Apply options
    if (options.fade) {
      $el.hide().fadeIn(FADE_TIME);
    }
    if (options.prepend) {
      $messages.prepend($el);
    } else {
      $messages.append($el);
    }
    $messages[0].scrollTop = $messages[0].scrollHeight;
  }

  // Prevents input from having injected markup
  function cleanInput (input) {
    return $('<div/>').text(input).text();
  }

  // Updates the typing event
  function updateTyping () {
    if (connected) {
      if (!typing) {
        typing = true;
        rpc_client.emit('typing');
      }
      lastTypingTime = (new Date()).getTime();

      setTimeout(function () {
        var typingTimer = (new Date()).getTime();
        var timeDiff = typingTimer - lastTypingTime;
        if (timeDiff >= TYPING_TIMER_LENGTH && typing) {
          rpc_client.emit('stoptyping');
          typing = false;
        }
      }, TYPING_TIMER_LENGTH);
    }
  }

  // Gets the 'X is typing' messages of a user
  function getTypingMessages (data) {
    return $('.typing.message').filter(function (i) {
      return $(this).data('username') === data.username;
    });
  }

  // Gets the color of a username through our hash function
  function getUsernameColor (username) {
    // Compute hash code
    var hash = 7;
    for (var i = 0; i < username.length; i++) {
       hash = username.charCodeAt(i) + (hash << 5) - hash;
    }
    // Calculate color
    var index = Math.abs(hash % COLORS.length);
    return COLORS[index];
  }

  var keydown = function (event) {
    // Auto-focus the current input when a key is typed
    if (!(event.ctrlKey || event.metaKey || event.altKey)) {
      $currentInput.focus();
    }
    // When the client hits ENTER on their keyboard
    if (event.which === 13) {
      if (username) {
        sendMessage();
        rpc_client.emit('stoptyping');
        typing = false;
      } else {
        setUsername();
      }
    }
  }

  $usernameInput.keydown(keydown);
  $inputMessage.keydown(keydown);
  // Keyboard events
  //$window.keypress(keydown);

  $inputMessage.on('input', function() {
    updateTyping();
  });

  // Click events

  // Focus input when clicking anywhere on login page
  $loginPage.click(function () {
    $currentInput.focus();
  });

  // Focus input when clicking on the message input's border
  $inputMessage.click(function () {
    $inputMessage.focus();
  });

  // Socket events

  // Whenever the server emits 'login', log the login message
  rpc_client.on('login', function (data) {
    connected = true;
    // Display the welcome message
    var message = "Welcome to Socket.IO Chat – ";
    log(message, {
      prepend: true
    });
    addParticipantsMessage(data);
  });

  // Whenever the server emits 'new message', update the chat body
  rpc_client.on('chat', function (data) {
    addChatMessage(data);
  });

  // Whenever the server emits 'user joined', log it in the chat body
  rpc_client.on('userjoin', function (data) {
    log(data.username + ' joined');
    addParticipantsMessage(data);
  });

  // Whenever the server emits 'user left', log it in the chat body
  rpc_client.on('userleft', function (data) {
    log(data.username + ' left');
    addParticipantsMessage(data);
    removeChatTyping(data);
  });

  // Whenever the server emits 'typing', show the typing message
  rpc_client.on('typing', function (data) {
    addChatTyping(data);
  });

  // Whenever the server emits 'stop typing', kill the typing message
  rpc_client.on('stoptyping', function (data) {
    removeChatTyping(data);
  });
//});
</script>
</body>
</html>