Question

我正在使用DropzoneJS脚本上传图片并使用drag＆amp; drop，但现在我正在寻找一个解决方案，以便在上传到服务器文件夹之前如何添加带有文件名的当前时间戳，因为如果该文件已存在于文件夹中，我无法上传相同的图像。

我还在下面提到了stackoverflow链接，但我很困惑在哪里实现它。

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

Answer 1

请检查我使用PHP实现的以下代码。

在索引文件

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"
            });

        });

<强> upload.php的

<?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;
}
?>

<强> 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上传图像和使用ajax删除有帮助：）

我从以下参考文献中找到：

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

在第1110行之后的dropzone.js文件中添加以下代码，以防止用户上传具有相同名称的重复文件：）

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;
        }
    }
}

参考链接：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

Answer 2

要在每次上传前为文件名添加时间戳，您有两个选项，具体取决于您的DropzoneJS版本。

较新版本的 DropzoneJS 5.1 + 确实有renameFile函数，其使用方法如下：

    ...
    renameFile: function (file) {
        file.name = new Date().getTime() + '_' + file.name;
    }
    ...

在旧版本 v4.3 - v5.1中，这有点不同。

在此版本中有一个renameFilename选项，使用方式如下：

Dropzone.autoDiscover = false;
$(document).ready(function () {
    $(".dropzone").dropzone({
        renameFilename: function (filename) {
            return new Date().getTime() + '_' + filename;
        }
    });
});

快乐的编码， Kalasch

Answer 3

我刚使用标准的php文件重命名。

$targetFile =  $targetPath . $_FILES['file']['name']; //the original upload
$newfilename = "somename" . $variable . ".jpg"; //a new filename string

rename($targetFile , $new); //rename at the end of the function

这对我来说效果很好，实施起来非常简单。可能不建议将.jpg扩展名用于硬编码，但在我的场景中我只能获得jpg文件类型。

Dropzone.js - 如何在上传到文件夹之前更改文件名

3 个答案: