aetherupload.js 多文件上传写法 v1.0
2020年12月28日|
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var AetherUpload = { upload: function () { $.ajaxSetup({ headers: { 'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content') } }); this.locale; this.resourceDom = this.wrapperDom.find('#aetherupload-resource'); //上传按钮 this.outputDom = this.wrapperDom.find('#aetherupload-output'); //消息提示 this.progressBarDom = this.wrapperDom.find('#aetherupload-progressbar'); //进度条 this.resource = this.resourceDom[0].files[0]; this.resourceName = this.resource.name; this.resourceSize = this.resource.size; this.resourceTempBaseName = ''; this.resourceExt = ''; this.chunkSize = 0; this.chunkCount = 0; this.groupSubDir = ''; this.savedPath = ''; this.resourceHash = ''; this.blobSlice = File.prototype.slice || File.prototype.mozSlice || File.prototype.webkitSlice; this.i = 0; this.messages = this.getLocalizedMessages(); this.storageHost = $('#aetherupload-storage-host').length ? $('#aetherupload-storage-host').val() : ''; /** * 浏览器是否支持这个文件上传组件 */ if (!this.blobSlice) { this.outputDom.text(this.messages.error_unsupported_browser); return; } /** * 文件大小如果等于0保存 */ if (this.resourceSize === 0) { this.outputDom.text(this.messages.error_invalid_resource_size); return; } /** * 文件类型报错 */ if (this.resourceName.substring(this.resourceName.lastIndexOf('.') + 1, this.resourceName.length) === '') { this.outputDom.text(this.messages.error_invalid_resource_type); return; } this.outputDom.text(this.messages.status_upload_begin); //开始上传文字提示 this.resourceDom.attr('disabled', 'disabled'); if (!('FileReader' in window) || !('File' in window) || typeof SparkMD5 === 'undefined') { this.preprocess(); //浏览器不支持读取本地文件，跳过计算hash } else if (this.laxMode === true) { this.preprocess(); //宽松模式，跳过计算hash } else { this.calculateHash(); } }, /** * 计算hash */ calculateHash: function () { var _this = this; var clientChunkSize = 4000000; var chunks = Math.ceil(_this.resource.size / clientChunkSize); //看看能切成几份 var currentChunk = 0; //用于统计当前进行哪一步 var spark = new SparkMD5.ArrayBuffer(); //md5 var fileReader = new FileReader(); //对象允许Web应用程序异步读取存储在用户计算机上的文件 fileReader.onload = function (e) { spark.append(e.target.result); //数据添加到spark准备计算md5 ++currentChunk; _this.outputDom.text(_this.messages.status_hashing + ' ' + parseInt(currentChunk / chunks * 100) + '%'); //显示百分比 if (currentChunk < chunks) { loadNext(); } else { _this.resourceHash = spark.end(); //计算md5 _this.preprocess(); //调用预处理 } }; //绑定错误事件,如果文件上传出错进入预处理阶段 fileReader.onerror = function () { _this.preprocess(); //调用预处理 }; function loadNext() { var start = currentChunk * clientChunkSize; var end = start + clientChunkSize >= _this.resource.size ? _this.resource.size : start + clientChunkSize; fileReader.readAsArrayBuffer(_this.blobSlice.call(_this.resource, start, end)); } loadNext(); }, /** * 准备 */ preprocess: function () { //预处理 var _this = this; $.ajax({ url : _this.storageHost + _this.preprocessRoute, type : 'POST', dataType : 'json', xhrFields : { //跨域请求设置 withCredentials: true }, crossDomain: true, data: { resource_name: _this.resourceName, resource_size: _this.resourceSize, resource_hash: _this.resourceHash, //获取文件md5 locale : _this.locale, group : _this.group }, success: function (rst) { //返回错误信息 if (rst.error) { _this.outputDom.text(rst.error); return; } _this.resourceTempBaseName = rst.resourceTempBaseName; _this.resourceExt = rst.resourceExt; _this.chunkSize = rst.chunkSize; _this.chunkCount = Math.ceil(_this.resourceSize / _this.chunkSize); _this.groupSubDir = rst.groupSubDir; //急速秒传 if (rst.savedPath.length === 0) { _this.uploadChunk(); } else { _this.savedPath = rst.savedPath; if( _this.savedPathList.length){ //多文件执行这里 _this.savedPathList.prepend($('<input name="files[]" value="'+_this.savedPath+'">')) _this.resourceDom.removeAttr('disabled'); } else { _this.savedPathDom.val(_this.savedPath); _this.resourceDom.attr('disabled', 'disabled'); } _this.outputDom.text(_this.messages.status_upload_succeed); _this.progressBarDom.css('width', '100%'); typeof(_this.callback) !== 'undefined' ? _this.callback() : null; //上传成功的回调方法 } }, error: function (XMLHttpRequest, textStatus, errorThrown) { _this.outputDom.text(_this.messages.error_upload_fail); //返回上传失败错误信息 } }); }, /** * 上传和切割文件 */ uploadChunk: function () { var _this = this; var start = this.i * this.chunkSize; var end = Math.min(this.resourceSize, start + this.chunkSize); var form = new FormData(); //创建一个表单数据 form.append('resource_chunk' , this.resource.slice(start, end)); form.append('resource_ext' , this.resourceExt); form.append('chunk_total' , this.chunkCount); form.append('chunk_index' , this.i + 1); form.append('resource_temp_basename', this.resourceTempBaseName); form.append('group' , this.group); form.append('group_subdir' , this.groupSubDir); form.append('locale' , this.locale); form.append('resource_hash' , this.resourceHash); $.ajax({ url : _this.storageHost + _this.uploadingRoute, type : 'POST', data : form, dataType : 'json', xhrFields: { withCredentials: true }, cache : false, //关闭缓存 crossDomain : true, processData : false, contentType : false, success : function (rst) { if ((rst instanceof Object) !== true) { _this.outputDom.text(_this.messages.error_invalid_server_return); return; } if (rst.error === 'undefined' || rst.error) { _this.outputDom.text(rst.error); return; } var percent = parseInt((_this.i + 1) / _this.chunkCount * 100); _this.progressBarDom.css('width', percent + '%'); _this.outputDom.text(_this.messages.status_uploading + ' ' + percent + '%'); if (rst.savedPath !== 'undefined' && rst.savedPath !== '') { _this.savedPath = rst.savedPath; console.log(_this.savedPathList) if( _this.savedPathList.length){ //多文件执行这里 _this.savedPathList.prepend($('<input name="files[]" value="'+_this.savedPath+'">')) _this.resourceDom.removeAttr('disabled'); } else { _this.savedPathDom.val(_this.savedPath); _this.resourceDom.attr('disabled', 'disabled'); } _this.outputDom.text(_this.messages.status_upload_succeed); _this.progressBarDom.css('width', '100%'); typeof(_this.callback) !== 'undefined' ? _this.callback() : null; //上传成功的回调方法 } else { ++_this.i; _this.uploadChunk(); } }, error: function (XMLHttpRequest, textStatus, errorThrown) { if (XMLHttpRequest.status === 0) { _this.outputDom.text(_this.messages.status_retrying); _this.sleep(5000); _this.uploadChunk(); } else { _this.outputDom.text(_this.messages.error_upload_fail); } } }); }, /** * 睡眠暂停方法 * @param milliSecond */ sleep: function (milliSecond) { var wakeUpTime = new Date().getTime() + milliSecond; while (true) { if (new Date().getTime() > wakeUpTime) { return; } } }, /** * 成功后回调方法 * @param callback * @returns {AetherUpload} */ success: function (callback) { this.callback = callback; return this; }, /** * 获取准备路由的方法 * @param route * @returns {AetherUpload} */ setPreprocessRoute: function (route) { this.preprocessRoute = route; return this; }, /** * 上传路由的方法 * @param route * @returns {AetherUpload} */ setUploadingRoute: function (route) { this.uploadingRoute = route; return this; }, /** * 设置组 * @param group * @returns {AetherUpload} */ setGroup: function (group) { this.group = group; return this; }, /** * 设置保存路径 * @param selector * @returns {AetherUpload} */ setSavedPathField: function (selector) { this.savedPathDom = $(selector); return this; }, /** * 设置多文件保存路径 * @param selector */ savedPathList: function (selector) { this.savedPathList = $(selector); return this; }, /** * 设置模式宽松模式 * @param isLax * @returns {AetherUpload} */ setLaxMode: function (isLax) { this.laxMode = isLax; return this; }, /** * 信息提示 * @returns {*} */ getLocalizedMessages: function () { var lang = navigator.language ? navigator.language : navigator.browserLanguage; var locales = Object.getOwnPropertyNames(this.text); for (var k in locales) { if (lang.indexOf(locales[k]) > -1) { this.locale = locales[k]; return this.text[this.locale]; } } this.locale = 'en'; return this.text[this.locale]; }, /** * 多语言转义表 */ text: { en: { status_upload_begin: 'upload begin', error_unsupported_browser: 'Error: unsupported browser', status_hashing: 'hashing', status_instant_completion_success: 'upload succeed (instant completion) ', status_uploading: 'uploading', status_upload_succeed: 'upload succeed', status_retrying: 'network problem, retrying...', error_upload_fail: 'Error: upload fail', error_invalid_server_return: 'Error: invalid server return value', error_invalid_resource_size: 'Error: invalid resource size', error_invalid_resource_type: 'Error: invalid resource type' }, zh: { status_upload_begin: '开始上传', error_unsupported_browser: '错误：上传组件不被此浏览器支持', status_hashing: '正在哈希', status_instant_completion_success: '上传成功（秒传）', status_uploading: '正在上传', status_upload_succeed: '上传成功', status_retrying: '网络故障，正在重试……', error_upload_fail: '错误：上传失败', error_invalid_server_return: '错误：无效的服务器返回值', error_invalid_resource_size: '错误：无效的文件大小', error_invalid_resource_type: '错误：无效的文件类型' } } }; /* * 创建AetherUpload对象的全局方法 * resource 文件对象 * group 分组名 */ function aetherupload(resource) { var newInstance = Object.create(AetherUpload); newInstance.wrapperDom = $(resource).parents('.aetherupload-wrapper'); newInstance.group = 'file'; //分组的默认值 newInstance.savedPathDom = newInstance.wrapperDom.find('#aetherupload-savedpath'); //单文件资源储存地址所在节点的默认值 newInstance.savedPathList = newInstance.wrapperDom.find('#aetherupload-savedpath-list'); //多文件资源储存地址所在节点的默认值 newInstance.preprocessRoute = '/aetherupload/preprocess'; //预处理路由的默认值 newInstance.uploadingRoute = '/aetherupload/uploading'; //上传路由的默认值 newInstance.laxMode = false; //宽松模式 return newInstance; } |
