dropzone.js - 在服务器上显示现有文件

StackOverflow https://stackoverflow.com//questions/24009298

  •  21-12-2019
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题

我目前正在使用dropzone.js v3.10.2我有问题显示我已经上传的现有文件。我比PHP能够胜任，但是当涉及到AJAX和JS

时，我的知识有限

如果您可以帮助那将是令人敬畏的

提前感谢

index.php 

    <html>

<head>  

<link href="css/dropzone.css" type="text/css" rel="stylesheet" />


<script src="ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>

<script src="dropzone.min.js"></script>

<script>

Dropzone.options.myDropzone = {
    init: function() {
        thisDropzone = this;

        $.get('upload.php', function(data) {


            $.each(data, function(key,value){

                var mockFile = { name: value.name, size: value.size };

                thisDropzone.options.addedfile.call(thisDropzone, mockFile);

                thisDropzone.options.thumbnail.call(thisDropzone, mockFile, "uploads/"+value.name);

            });

        });
    }
};
</script>

</head>

<body>


<form action="upload.php" class="dropzone" id="my-dropzone"></form>

</body>
.

upload.php 

<?php
$ds          = DIRECTORY_SEPARATOR; 

$storeFolder = 'uploads';  

if (!empty($_FILES)) {

    $tempFile = $_FILES['file']['tmp_name'];         

    $targetPath = dirname( __FILE__ ) . $ds. $storeFolder . $ds; 

    $targetFile =  $targetPath. $_FILES['file']['name']; 

    move_uploaded_file($tempFile,$targetFile);

} else {                                                           
    $result  = array();

    $files = scandir($storeFolder);                 //1
    if ( false!==$files ) {
        foreach ( $files as $file ) {
            if ( '.'!=$file && '..'!=$file) {       //2
                $obj['name'] = $file;
                $obj['size'] = filesize($storeFolder.$ds.$file);
                $result[] = $obj;
            }
        }
    }

    header('Content-type: text/json');              //3
    header('Content-type: application/json');
    echo json_encode($result);
}
?>
.

ps。我知道PHP正在检索数据

提前感谢

damian

有帮助吗？

解决方案

我检查了代码（从Startutorial），它不适用于我（？）

我设法通过替换它来工作：

$.get('upload.php', function(data) {
  $.each(data, function(key,value) {
    var mockFile = { name: value.name, size: value.size };
    thisDropzone.options.addedfile.call(thisDropzone, mockFile);
    thisDropzone.options.thumbnail.call(thisDropzone, mockFile, "uploads/"+value.name);
  });
});
.

：

$.getJSON('files/list-all', function(data) {
  $.each(data, function(index, val) {
    var mockFile = { name: val.name, size: val.size };
    thisDropzone.options.addedfile.call(thisDropzone, mockFile);
    thisDropzone.options.thumbnail.call(thisDropzone, mockFile, "uploads/" + val.name);
  });
});
.

归功于此答案： https://stackoverflow.com/a/5531883/984975

编辑： 在版本4.0中，现有文件的缩略图将显示在其中的提示栏中。要解决此添加：

thisDropzone.emit("complete", mockFile);
.

其他提示

用于Dropzone 5.x

到目前为止给出的解决方案不适用于 dropzone版本5.x 。 对我有效的是修改Dropzone的配置选项，如下所示：

init: function () {
                var mockFile = {
                    name: 'FileName',
                    size: '1000', 
                    type: 'image/jpeg',
                    accepted: true            // required if using 'MaxFiles' option
                };
                this.files.push(mockFile);    // add to files array
                this.emit("addedfile", mockFile);
                this.emit("thumbnail", mockFile, 'http://url/to/file');
                this.emit("complete", mockFile); 
            }
.

概念是，要创建模拟文件，并调用事件处理程序 addedfile 和 thumbnail 以绘制预览。然后最后打电话给 complete 事件，以确保显示没有进度条等。

参考

This is the way which I implemented it. I have used createThumbnailFromUrl rather using emitting a thumbnail event.

HTML element;

<form id="sample-img" action="/upload" class="dropzone">
    <div class="dz-default dz-message"></div>
</form>

JS code;

previewThumbailFromUrl({
    selector: 'sample-img',
    fileName: 'sampleImg',
    imageURL: '/images/sample.png'
});

function previewThumbailFromUrl(opts) {
    var imgDropzone = Dropzone.forElement("#" + opts.selector);
    var mockFile = {
        name: opts.fileName,
        size: 12345,
        accepted: true,
        kind: 'image'
    };
    imgDropzone.emit("addedfile", mockFile);
    imgDropzone.files.push(mockFile);
    imgDropzone.createThumbnailFromUrl(mockFile, opts.imageURL, function() {
        imgDropzone.emit("complete", mockFile);
    });
}

I was having trouble with maxFiles/maxfilesexceeded and take some while looking for a anwser and then I found this links below:

https://www.bountysource.com/issues/1444854-use-files-already-stored-on-server-wiki-example-incomplete?utm_campaign=plugin&utm_content=tracker%2F283989&utm_medium=issues&utm_source=github

$.each(obj, function(i, item) {

  ///faking the BytesSent its not essanail to me.. if you need it just pass the correct one
  var upload = {bytesSent: 12345};

  /// again fake the size..
  var mockFile = {name: item.name, size: 12345, accepted: true};

  mockFile.upload = upload;
  mockFile.kind = "file";
  Dropzone.forElement("#editfileuploader").emit("addedfile", mockFile);

  //push the file to files array because getAcceptedFiles using this array length to get the currct files count..
  Dropzone.forElement("#editfileuploader").files.push(mockFile);

  //this for lettig dropzone to creat the thumbnail(item.ts has the file location)
  Dropzone.forElement("#editfileuploader").emit("thumbnail", mockFile, item.ts);

  //to show the success mark and to return image id response
  Dropzone.forElement("#editfileuploader").emit("success", mockFile, item.id);
});
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