Question

这是问题的切线：

Returning value to Javascript from PHP called from XMLHttpRequest

我正在为我的AjaxChat添加一个“图像上传”按钮。我正在使用XMLHttpRequest将图像发送到服务器，在那里我运行PHP脚本将其移动到我的images文件夹。下面是负责打开XMLHttpRequest连接并发送文件的Javascript函数：

function uploadImage() {
        var form = document.getElementById('fileSelectForm');
        var photo = document.getElementById('photo');
        var uploadButton = document.getElementById('imageUploadButton');
        form.onsubmit = function(event) {
            event.preventDefault();

            // Update button text
            uploadButton.innerHTML = 'Uploading...';

            //Get selected files from input
            var files = photo.files;

            // Create a new FormData object
            var formData = new FormData();

            // Loop through selected files
            for (var i = 0; files.length > i; i++) {
                var file = files[i];

                // Check file type; only images are allowed
                if (!file.type.match('image/*')) {
                    continue;
                }
                // Add file to request
                formData.append('photo', file, file.name);
            }

            // Set up request
            var xhr = new XMLHttpRequest();

            // Open connection
            xhr.open('POST', 'sites/all/modules/ajaxchat/upload.php', true);

            // Set up handler for when request finishes
            xhr.onload = function () {
                if (xhr.status === 200) {
                    //File(s) uploaded
                    uploadButton.innerHTML = 'Upload';
                    var result = xhr.responseText;
                    ajaxChat.insertText('\n\[img\]http:\/\/www.mysite.com\/images' + result + '\[\/img\]');
                    ajaxChat.sendMessage();
                } else {
                    alert('An error occurred!');
                }
                form.reset();
            };

            // Send data
            xhr.send(formData);
        }
    }

这是upload.php：

<?php
$valid_file = true;
if($_FILES['photo']['name']) {
    //if no errors...
    if(!$_FILES['photo']['error']) {
        //now is the time to modify the future file name and validate the file
        $new_file_name = strtolower($_FILES['photo']['tmp_name']); //rename file
        if($_FILES['photo']['size'] > (1024000)) { //can't be larger than 1 MB
            $valid_file = false;
        }

        //if the file has passed the test
        if($valid_file) {
            //move it to where we want it to be
            move_uploaded_file($_FILES['photo']['tmp_name'], '/var/www/html/images'.$new_file_name);
            $message = $new_file_name;
            exit("$message");
        }
    }
}
?>

我目前禁用了多个图片上传，因此“循环选定文件”只执行一次。

上传在我的电脑上工作了一点，但后来我尝试从手机上传图像。当我这样做时，整个服务器（和我的浏览器）崩溃了，大概是由于某个地方的无限循环。每次我关闭浏览器并重新登录，或重新启动服务器，或重新启动计算机时，它都会挂起并最终再次崩溃（在我的电脑或手机上）。我一直无法找到导致问题的脚本。我觉得它在我的鼻子底下。有谁看到这个问题？如果您需要HTML表单代码，那么我可以提供，但我不认为这是必要的。

AjaxChat：图片上传代码挂起，冻结浏览器，崩溃服务器

0 个答案: