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Javascript 聊天多次显示相同的消息

发布于 2024-12-03 08:08:22 字数 370 浏览 0 评论 0原文

我正在尝试让聊天工作，这是从教程中复制粘贴的。由于某种原因，聊天加载功能似乎每次应该运行一次时都运行两次！这真是要了我的命，我不知道出了什么问题。

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

这里是完整源代码：http://myslimchatroom.wikidot.com/

我认为它与last_message_id有关但我一直在调试它，它似乎知道正确的...

请帮助:(

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遮了一弯 2024-12-10 08:08:22

将发送末尾的Load ) 替换

为仅写入屏幕的函数

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不寐倦长更 2024-12-10 08:08:22

尝试将您的 php 代码从修复

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

为

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

Try to fix your php code from

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

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

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鱼忆七猫命九 2024-12-10 08:08:22

这可能有效，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");

This might work, in the Load() function change the $post command to this:

              $.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");

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久隐师 2024-12-10 08:08:22

在您的代码中，Load() 函数中缺少用于查看加载是否已在进行中的 if 语句。（你复制的地方没问题，不知道哪里出了问题）：

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
}

In your code, the if statement to see if the load is already in process is somehow missing from the Load() function. (It was fine in the place you copied from, I don't know what went wrong):

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
}

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