我正在尝试创建一个
Javascript聊天,在后台使用Python.这是我正在使用的代码
<html> <head> <Meta http-equiv="content-type" content="text/html; charset=UTF-8"> <title>UDP Chat</title> <!-- including JQuery just to simplify things --> <script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script> <script type="javascript/text"> var chat_room_id = undefined; var last_received = 0; /** * Initialize chat: * - Set the room id * - Generate the html elements (chat Box,forms & inputs,etc) * - Sync with server * @param chat_room_id the id of the chatroom * @param html_el_id the id of the html element where the chat html should be placed * @return */ function init_chat(chat_id,html_el_id) { chat_room_id = chat_id; layout_and_bind(html_el_id); sync_messages(); } /** * Asks the server which was the last message sent to the room,and stores it's id. * This is used so that when joining the user does not request the full list of * messages,just the ones sent after he logged in. * @return */ function sync_messages() { $.ajax({ type: 'POST',data: {id:window.chat_room_id},url:'/chat/sync/',dataType: 'json',success: function (json) { last_received = json.last_message_id; } }); setTimeout("get_messages()",2000); } /** * Generate the Chat Box's HTML and bind the ajax events * @param target_div_id the id of the html element where the chat will be placed */ function layout_and_bind(html_el_id) { // layout stuff var html = '<div id="chat-messages-container">'+ '<div id="chat-messages"> </div>'+ '<div id="chat-last"> </div>'+ '</div>'+ '<form id="chat-form">'+ '<input name="message" type="text" class="message" />'+ '<input type="submit" value="Say"/>'+ '</form>'; $("#"+html_el_id).append(html); // event stuff $("#chat-form").submit( function () { var $inputs = $(this).children('input'); var values = {}; $inputs.each(function(i,el) { values[el.name] = $(el).val(); }); values['chat_room_id'] = window.chat_room_id; $.ajax({ data: values,type: 'post',url: '/chat/send/' }); $('#chat-form .message').val(''); return false; }); }; /** * Gets the list of messages from the server and appends the messages to the chatBox */ function get_messages() { $.ajax({ type: 'POST',data: {id:window.chat_room_id,offset: window.last_received},url:'/chat/receive/',success: function (json) { var scroll = false; // first check if we are at the bottom of the div,if we are,we shall scroll once the content is added var $containter = $("#chat-messages-container"); if ($containter.scrollTop() == $containter.attr("scrollHeight") - $containter.height()) scroll = true; // add messages $.each(json,function(i,m){ if (m.type == 's') $('#chat-messages').append('<div class="system">' + replace_emoticons(m.message) + '</div>'); else if (m.type == 'm') $('#chat-messages').append('<div class="message"><div class="author">'+m.author+'</div>'+replace_emoticons(m.message) + '</div>'); else if (m.type == 'j') $('#chat-messages').append('<div class="join">'+m.author+' has joined</div>'); else if (m.type == 'l') $('#chat-messages').append('<div class="leave">'+m.author+' has left</div>'); last_received = m.id; }) // scroll to bottom if (scroll) $("#chat-messages-container").animate({ scrollTop: $("#chat-messages-container").attr("scrollHeight") },500); } }); // wait for next setTimeout("get_messages()",2000); } /** * Tells the chat app that we are joining */ function chat_join() { $.ajax({ async: false,type: 'POST',data: {chat_room_id:window.chat_room_id},url:'/chat/join/',}); } /** * Tells the chat app that we are leaving */ function chat_leave() { $.ajax({ async: false,url:'/chat/leave/',}); } // attach join and leave events $(window).load(function(){chat_join()}); $(window).unload(function(){chat_leave()}); // emoticons var emoticons = { '>:D' : 'emoticon_evilgrin.png',':D' : 'emoticon_grin.png','=D' : 'emoticon_happy.png',':\\)' : 'emoticon_smile.png',':O' : 'emoticon_surprised.png',':P' : 'emoticon_tongue.png',':\\(' : 'emoticon_unhappy.png',':3' : 'emoticon_waii.png',';\\)' : 'emoticon_wink.png','\\(ball\\)' : 'sport_soccer.png' } /** * Regular expression maddness!!! * Replace the above strings for their img counterpart */ function replace_emoticons(text) { $.each(emoticons,function(char,img) { re = new RegExp(char,'g'); // replace the following at will text = text.replace(re,'<img src="/media/img/silk/'+img+'" />'); }); return text; } </script> </head> <body> <div id="chat"> </div> <script type="text/javascript"> $(window).ready(function(){ var chat_id = 1; init_chat({{ chat_id }},"chat"); }) </script> </body> </html>
当我在Firefox中加载页面时,我得到：
ReferenceError: init_chat is not defined
init_chat({{ chat_id }},"chat");
解决方法
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