Javascript聊天多次显示相同的消息

Question

我正在尝试使聊天工作正常进行，该工作是教程中的复制粘贴。 由于某种原因，聊天加载功能似乎每次应该运行一次就运行两次！ 这真杀了我，我不知道怎么了。

这是我的复制粘贴聊天： http : //www.releazed.com/chat/

这是完整的源代码： http : //myslimchatroom.wikidot.com/

我认为它与last_message_id有关，但是我一直在调试它，而且似乎知道正确的方法...

请帮忙 ：（

Answer 1

替换Load ）

从发送的末尾开始，带有仅写入屏幕的功能

Answer 2

尝试从修复您的php代码

 $js .= "last_message_id = $last_message_id;";

至

 $js .= "last_message_id = $last_message_id + 1;";

Answer 3

这可能起作用，在Load（）函数中，将$ post命令更改为：

              $.post("ajax.php",
        {
              act: "load", // point out that it is downloading messages
              last: last_message_id, // pass number of the last message that the user was last boot
              rand: (new Date()).getTime()
        },
           function (result) { // this function as a parameter is passed javascript code, which we must comply
                eval(result); // execute script from the server
                $(".chat").scrollTop($(".chat").get(0).scrollHeight); // scrolls the message down
                load_in_process = false; // say that downloading is over, we can now start a new download
        }, 
       "text");

Answer 4

在您的代码中，以某种方式缺少Load（）函数的if语句来查看加载是否已在进行中。 （在您复制的地方很好，我不知道出了什么问题）：

function Load() {
    // Check whether we can download the message. This is done to ensure that we do not start the download again, if the old download is not over yet.
    if(!load_in_process) //this line was missing
    { //also missing
            load_in_process = true; // Loading started
            // refer the request to the server, which returns us javascript
            $.post("ajax.php",
            {
                  act: "load", // point out that it is downloading messages
                  last: last_message_id, // pass number of the last message that the user was last boot
                  rand: (new Date()).getTime()
            },
               function (result) { // this function as a parameter is passed javascript code, which we must comply
                    eval(result); // execute script from the server
                    $(".chat").scrollTop($(".chat").get(0).scrollHeight); // scrolls the message down
                    load_in_process = false; // say that downloading is over, we can now start a new download
            });
   } //also missing
}

Answer 5

通过简单地删除JS eval(result);的最重要部分之一来解决该问题eval(result); 大声笑...我猜jquery自己做吗？ 好吧...