点击三次input按钮,前两次不选择任何文件，第三次选择一个文件，结果上传了3个文件，即发生了三次请求

Question

点击三次input按钮,前两次不选择任何文件，第三次选择一个文件，结果页面上出现了3个文件，也就是上传了3个文件

我点击input，不选择任何文件，然后取消文件选择器的窗口，然后第二次次点击input，同样不选择文件然后关闭，第三次点击input选择一个文件，结果页面上出现了三个个文件，且三个文件相同
就是说我点击三次input，前两次不选择任何文件，第三次选择一个文件上传，结果是上传了3个文件。

这是什么原因导致的，我的文件上传窗口只显示一个文件，上传窗口里面的数据和input里面的文件数是一致的

代码如下:

    <div id="upload-file" class="op-btn upload-file-btn">
    <span class="icon-upload-alt"></span><span>{% trans "Upload"%}</span>
    <input type="file" name="file-input" multiple />
    </div>
    
    <div id="upload-file2" class="hide op-btn upload-file-btn">
    <span class="icon-upload-alt"></span><span>{% trans "Upload folder"%}</span>
    <input type="file" id="files-input" name="file" multiple directory webkitdirectory />
    </div>

为什么点击三次input按钮,前两次不选择任何文件，第三次选择一个文件，结果页面上出现了3个文件，也就是上传了3个文件

function xx() {
        console.log(cur_path);
        var popup = $('#upload-file-dialog').addClass('fixed-upload-file-dialog');;
        var popup_height = '200px';
        popup.css({'height': popup_height}).data('height', popup_height);

        var fu_status = $('.status', popup),
            total_progress = $('.total-progress', popup),
            cancel_all_btn = $('.fileupload-buttonbar .cancel', popup),
            close_icon = $('.close', popup),
            saving_tip = $('.saving-tip', popup);

        var fu_status_ = {
            'uploading': "{% trans "File Uploading..." %}",
            'complete': "{% trans "File Upload complete" %}",
            'canceled': "{% trans "File Upload canceled" %}",
            'failed': "{% trans "File Upload failed" %}"
        };

        popup.fileupload({
            formData: {'parent_dir': cur_path},
            fileInput: $('#upload-file input'),
            paramName: 'file',
            // customize it for 'done'
            getFilesFromResponse: function (data) {
                if (data.result) {
                    return data.result;
                }
            },
            autoUpload:true,
            {% if max_upload_file_size %}
            maxFileSize: {{ max_upload_file_size }}, // in bytes
            {% endif %}
            maxNumberOfFiles: 500,
            sequentialUploads: true
        })
        .bind('fileuploadadd', function(e, data) {
           //var files = e.target.files; // FileList
            //for (var i = 0, f; f = files[i]; ++i) {
                //console.log(files[i].webkitRelativePath);
              //  $("#upload-file").data("dir",files[i].webkitRelativePath)
                
            //}
            //console.log(e);
            popup.removeClass('hide');
            cancel_all_btn.removeClass('hide');
            close_icon.addClass('hide');
        })
        .bind('fileuploadstart', function() {
            fu_status.html(fu_status_.uploading);
        })
        .bind('fileuploadsubmit', function(e, data) {
            if (data.files.length == 0) {
                return false;
            }
            var file = data.files[0];
            var xx = data.files[0].webkitRelativePath;
            //var yy = typeof(xx);
            console.log(file);
            
            // get url(token) for every file
            //if(file.error){
             //  console.log(file.error);
            //}
            //console.log(cur_path);
            if (!file.error) {
                $.ajax({
                    url: '{% url 'get_file_op_url' repo.id %}',
                    cache: false,
                    data: {
                        'op_type': 'upload',
                        'path': cur_path,
                        
                    },
                    dataType: 'json',
                    success: function(ret) {
                        data.url = ret['url'];
                        data.jqXHR = popup.fileupload('send', data);
                    },
                    error: function() {
                        file.error = "{% trans "Failed to get upload url" %}";
                    }
                });
                return false;
            }
        })
        .bind('fileuploadprogressall', function (e, data) {
            total_progress.html(parseInt(data.loaded / data.total * 100, 10) + '% ').removeClass('hide');
            //console.log(parseInt(data.loaded / data.total * 100, 10))
            if (data.loaded > 0 && data.loaded == data.total) {
                saving_tip.show();
            }
        })
        .bind('fileuploadstop', function() {
            //setTimeout(function() { location.reload(true); }, 1000);
        })
        // after tpl has rendered
        .bind('fileuploadcompleted', function() { // 'done'
            if ($('.files .cancel', popup).length == 0) {
                saving_tip.hide();
                total_progress.addClass('hide');
                fu_status.html(fu_status_.complete);
            }
        })
        .bind('fileuploadfailed', function(e, data) { // 'fail'
            if ($('.files .cancel', popup).length == 0) {
                cancel_all_btn.addClass('hide');
                close_icon.removeClass('hide');
                total_progress.addClass('hide');
                saving_tip.hide();
                if (data.errorThrown == 'abort') { // 'cancel'
                    fu_status.html(fu_status_.canceled);
                } else { // 'error'
                    fu_status.html(fu_status_.failed);
                }
            }
        });

        // Enable iframe cross-domain access via redirect option:
        popup.fileupload(
            'option',
            'redirect',
            window.location.href.replace(/\/repo\/[-a-z0-9]{36}\/.*/, '{{ MEDIA_URL }}cors/result.html?%s')
        );

};


function yy() {
        console.log(cur_path);
        var popup = $('#upload-file-dialog').addClass('fixed-upload-file-dialog');;
        var popup_height = '200px';
        popup.css({'height': popup_height}).data('height', popup_height);

        var fu_status = $('.status', popup),
            total_progress = $('.total-progress', popup),
            cancel_all_btn = $('.fileupload-buttonbar .cancel', popup),
            close_icon = $('.close', popup),
            saving_tip = $('.saving-tip', popup);

        var fu_status_ = {
            'uploading': "{% trans "File Uploading..." %}",
            'complete': "{% trans "File Upload complete" %}",
            'canceled': "{% trans "File Upload canceled" %}",
            'failed': "{% trans "File Upload failed" %}"
        };
        
        popup.fileupload({
            //formData: {'parent_dir': cur_path},
            fileInput: $('#upload-file2 input'),
            paramName: 'file',
            // customize it for 'done'
            getFilesFromResponse: function (data) {
                if (data.result) {
                    return data.result;
                }
            },
            autoUpload:true,
            {% if max_upload_file_size %}
            maxFileSize: {{ max_upload_file_size }}, // in bytes
            {% endif %}
            maxNumberOfFiles: 500,
            sequentialUploads: true
        })
        .bind('fileuploadadd', function(e, data) {
            var files = e.target.files; // FileList
            //for (var i = 0, f; f = files[i]; ++i) {
                //console.log(files[i].webkitRelativePath);
              //  $("#upload-file").data("dir",files[i].webkitRelativePath)
                
            //}
            console.log(files[0]);
            popup.removeClass('hide');
            cancel_all_btn.removeClass('hide');
            close_icon.addClass('hide');
        })
        .bind('fileuploadstart', function() {
            fu_status.html(fu_status_.uploading);
        })
        .bind('fileuploadsubmit', function(e, data) {
            if (data.files.length == 0) {
                return false;
            }
            var file = data.files[0];
            var uu = data.files[0].webkitRelativePath;
            //var yy = typeof(uu);
            console.log(file);
            
            // get url(token) for every file
            //if(file.error){
             //  console.log(file.error);
            //}
            if (!file.error) {
                $.ajax({
                    url: '{% url 'get_file_op_url' repo.id %}',
                    cache: false,
                    data: {
                        'op_type': 'upload',
                        'path': cur_path,
                        'dir-structure':uu,
                    },
                    dataType: 'json',
                    success: function(ret) {
                        data.url = ret['url'];
                        data.formData = {parent_dir:cur_path+ret['path']}
                        //console.log(ret['path']);
                        data.jqXHR = popup.fileupload('send', data);
                    },
                    error: function() {
                        file.error = "{% trans "Failed to get upload url" %}";
                    }
                });
                return false;
            }
        })
        .bind('fileuploadprogressall', function (e, data) {
            total_progress.html(parseInt(data.loaded / data.total * 100, 10) + '% ').removeClass('hide');
            //console.log(parseInt(data.loaded / data.total * 100, 10))
            if (data.loaded > 0 && data.loaded == data.total) {
                saving_tip.show();
            }
        })
        .bind('fileuploadstop', function() {
            //setTimeout(function() { location.reload(true); }, 5000);
        })
        // after tpl has rendered
        .bind('fileuploadcompleted', function() { // 'done'
            if ($('.files .cancel', popup).length == 0) {
                saving_tip.hide();
                total_progress.addClass('hide');
                fu_status.html(fu_status_.complete);
            }
        })
        .bind('fileuploadfailed', function(e, data) { // 'fail'
            if ($('.files .cancel', popup).length == 0) {
                cancel_all_btn.addClass('hide');
                close_icon.removeClass('hide');
                total_progress.addClass('hide');
                saving_tip.hide();
                if (data.errorThrown == 'abort') { // 'cancel'
                    fu_status.html(fu_status_.canceled);
                } else { // 'error'
                    fu_status.html(fu_status_.failed);
                }
            }
        });

        // Enable iframe cross-domain access via redirect option:
        popup.fileupload(
            'option',
            'redirect',
            window.location.href.replace(/\/repo\/[-a-z0-9]{36}\/.*/, '{{ MEDIA_URL }}cors/result.html?%s')
        );
    
};

$('#upload-file').click(xx);
$('#upload-file2').click(yy); 

// fold/unfold the dialog
$('#upload-file-dialog .fold-switch').click(function() {
    var popup = $('#upload-file-dialog');
    var full_ht = parseInt(popup.data('height'));
    var main_con = $('.fileupload-buttonbar, .table', popup);
    if (popup.height() == full_ht) {
        popup.height($('.hd', popup).outerHeight(true));
        main_con.addClass('hide');
    } else {
        popup.height(full_ht);
        main_con.removeClass('hide');
    }
});

$('#upload-file-dialog .close').click(function() {
    $('#upload-file-dialog').addClass('hide');
    $('#upload-file-dialog .files').empty();
});

window.locale = {
    "fileupload": {
        "errors": {
            "maxFileSize": "{% trans "File is too big" %}",
            "minFileSize": "{% trans "File is too small" %}",
            "acceptFileTypes": "{% trans "Filetype not allowed" %}",
            "maxNumberOfFiles": "{% trans "Max number of files exceeded" %}",
            "uploadedBytes": "{% trans "Uploaded bytes exceed file size" %}",
            "emptyResult": "{% trans "Empty file upload result" %}"
        },
        "error": "{% trans "Error" %}",
        "uploaded": "{% trans "uploaded" %}",
        "canceled": "{% trans "canceled" %}",
        "start": "{% trans "Start" %}",
        "cancel": "{% trans "Cancel" %}",
        "destroy": "{% trans "Delete" %}"
    }
};

$(function(){
    var agent = navigator.userAgent.toLowerCase();
    if(agent.indexOf(' applewebkit/') == -1){
        $("#upload-file2").hide()
    }
});

Answer 1

觉得你是点击上传按钮就执行xx函数，那么你每次点击都给popup绑定了fileupload组件，所以你点击了多少了次就会执行多少次
比较好的方法是直接绑定fileupload，然后每次点击上传显示这个popup就可以

Answer 2

我刚写的。不知道是不是你要的效果

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>问题[1010000005841104]</title>
    <style>
        .uploader {
            display: inline-block;
            position: relative;
        }

        .uploader > #file {
            position: absolute;
            width: 100%;
            height: 100%;
            left: 0;
            top: 0;
            z-index: 1;
            opacity: 0;
        }
    </style>
</head>
<body>
<div class="uploader">
    <button type="button">上传文件</button>
    <input type="file" name="file" id="file" multiple>
</div>
<script>
    document.querySelector('#file').addEventListener('change', function(e) {
        alert('选择了' + e.target.files.length + '个文件，请查看控制台');
        console.table(e.target.files);
    }, false);
</script>
</body>
</html>

复制代码就保存一下用浏览器打开就可以了。建议用chrome

Answer 3

js onchange

Answer 4

建议在脚本中执行上传工作的语句上 输出下 选中文件路径 然后每次结束后清空下上传文件列表 上传文件列表与按钮下方的文件列表分别置于不同数组中