jquery - Dropzone.js - 如何在上传到文件夹之前更改文件名

Question

我正在使用DropzoneJS用于通过拖放上传图像的脚本，但现在我正在寻找一种解决方案，如何在上传到服务器文件夹之前添加当前时间戳和文件名，因为如果文件已存在于中，我将无法上传相同的图像文件夹。

我还引用了下面的 stackoverflow 链接，但我很困惑在哪里实现它。

1. https://stackoverflow.com/a/23805488/3113858
2. https://stackoverflow.com/a/19432731/3113858

这里是dropzone.js script供引用

Answer 1

请检查我使用 PHP 实现的以下代码。

在您的索引文件中使用以下代码

$(document).ready(function() {
            Dropzone.autoDiscover = false;
            var fileList = new Array;
            var i =0;
            $("#some-dropzone").dropzone({
                addRemoveLinks: true,
                init: function() {

                    // Hack: Add the dropzone class to the element
                    $(this.element).addClass("dropzone");

                    this.on("success", function(file, serverFileName) {
                        fileList[i] = {"serverFileName" : serverFileName, "fileName" : file.name,"fileId" : i };
                        //console.log(fileList);
                        i++;

                    });
                    this.on("removedfile", function(file) {
                        var rmvFile = "";
                        for(f=0;f<fileList.length;f++){

                            if(fileList[f].fileName == file.name)
                            {
                                rmvFile = fileList[f].serverFileName;

                            }

                        }

                        if (rmvFile){
                            $.ajax({
                                url: "http://localhost/dropzone/sample/delete_temp_files.php",
                                type: "POST",
                                data: { "fileList" : rmvFile }
                            });
                        }
                    });

                },
                url: "http://localhost/dropzone/sample/upload.php"
            });

        });

上传.php

<?php
$ds = DIRECTORY_SEPARATOR;  // Store directory separator (DIRECTORY_SEPARATOR) to a simple variable. This is just a personal preference as we hate to type long variable name.
$storeFolder = 'uploads';   // Declare a variable for destination folder.
if (!empty($_FILES)) {

    $tempFile = $_FILES['file']['tmp_name'];          // If file is sent to the page, store the file object to a temporary variable.
    $targetPath = dirname( __FILE__ ) . $ds. $storeFolder . $ds;  // Create the absolute path of the destination folder.
    // Adding timestamp with image's name so that files with same name can be uploaded easily.
    $date = new DateTime();
    $newFileName = $date->getTimestamp().$_FILES['file']['name'];
    $targetFile =  $targetPath.$newFileName;  // Create the absolute path of the uploaded file destination.
    move_uploaded_file($tempFile,$targetFile); // Move uploaded file to destination.

    echo $newFileName;
}
?>

delete_temp_files.php

<?php
$ds = DIRECTORY_SEPARATOR;  // Store directory separator (DIRECTORY_SEPARATOR) to a simple variable. This is just a personal preference as we hate to type long variable name.
$storeFolder = 'uploads'; 

$fileList = $_POST['fileList'];
$targetPath = dirname( __FILE__ ) . $ds. $storeFolder . $ds;


if(isset($fileList)){
    unlink($targetPath.$fileList);
}

?>

希望这对使用ajax上传图片和使用ajax删除有所帮助:)

我从以下引用文献中找到:

Dropzone.js- How to delete files from server? Dropzone.js remove button with php

还在 dropzone.js 文件中第 #1110 行后添加以下代码，以防止用户上传同名的重复文件:)

Dropzone.prototype.addFile = function(file) {
    if (this.files.length) {
        var _i, _len;
        for (_i = 0, _len = this.files.length; _i < _len; _i++) {
            if(this.files[_i].name === file.name && this.files[_i].size === file.size) {
                return false;
        }
    }
}

引用链接:https://www.bountysource.com/issues/2993843-dropzone-did-not-check-the-duplicate-file-on-addfile?utm_campaign=plugin&utm_content=tracker%2F283989&utm_medium=issues&utm_source=github