mirror of https://github.com/jkjoy/sunpeiwen.git
1660 lines
53 KiB
JavaScript
1660 lines
53 KiB
JavaScript
var session = require('./session');
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var fs = require('fs');
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var Async = require('./async');
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var EventProxy = require('./event').EventProxy;
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var util = require('./util');
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// 文件分块上传全过程，暴露的分块上传接口
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function sliceUploadFile(params, callback) {
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var self = this;
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var ep = new EventProxy();
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var TaskId = params.TaskId;
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var Bucket = params.Bucket;
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var Region = params.Region;
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var Key = params.Key;
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var FilePath = params.FilePath;
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var ChunkSize = params.ChunkSize || params.SliceSize || self.options.ChunkSize;
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var AsyncLimit = params.AsyncLimit;
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var StorageClass = params.StorageClass;
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var ServerSideEncryption = params.ServerSideEncryption;
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var FileSize;
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var onProgress;
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var onHashProgress = params.onHashProgress;
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// 上传过程中出现错误，返回错误
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ep.on('error', function (err) {
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if (!self._isRunningTask(TaskId)) return;
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var _err = {
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UploadId: params.UploadData.UploadId || '',
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err: err,
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};
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return callback(_err);
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});
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// 上传分块完成，开始 uploadSliceComplete 操作
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ep.on('upload_complete', function (UploadCompleteData) {
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var _UploadCompleteData = util.extend(
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{
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UploadId: params.UploadData.UploadId || '',
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},
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UploadCompleteData,
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);
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callback(null, _UploadCompleteData);
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});
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// 上传分块完成，开始 uploadSliceComplete 操作
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ep.on('upload_slice_complete', function (UploadData) {
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var metaHeaders = {};
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util.each(params.Headers, function (val, k) {
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var shortKey = k.toLowerCase();
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if (shortKey.indexOf('x-cos-meta-') === 0 || shortKey === 'pic-operations') metaHeaders[k] = val;
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});
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uploadSliceComplete.call(
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self,
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{
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Bucket: Bucket,
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Region: Region,
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Key: Key,
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UploadId: UploadData.UploadId,
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SliceList: UploadData.SliceList,
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Headers: metaHeaders,
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},
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function (err, data) {
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if (!self._isRunningTask(TaskId)) return;
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session.removeUsing(UploadData.UploadId);
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if (err) {
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onProgress(null, true);
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return ep.emit('error', err);
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}
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session.removeUploadId.call(self, UploadData.UploadId);
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onProgress({ loaded: FileSize, total: FileSize }, true);
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ep.emit('upload_complete', data);
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},
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);
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});
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// 获取 UploadId 完成，开始上传每个分片
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ep.on('get_upload_data_finish', function (UploadData) {
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// 处理 UploadId 缓存
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var uuid = session.getFileId(params.FileStat, params.ChunkSize, Bucket, Key);
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uuid && session.saveUploadId.call(self, uuid, UploadData.UploadId, self.options.UploadIdCacheLimit); // 缓存 UploadId
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session.setUsing(UploadData.UploadId); // 标记 UploadId 为正在使用
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// 获取 UploadId
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onProgress(null, true); // 任务状态开始 uploading
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uploadSliceList.call(
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self,
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{
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TaskId: TaskId,
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Bucket: Bucket,
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Region: Region,
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Key: Key,
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FilePath: FilePath,
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FileSize: FileSize,
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SliceSize: ChunkSize,
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AsyncLimit: AsyncLimit,
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ServerSideEncryption: ServerSideEncryption,
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UploadData: UploadData,
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Headers: params.Headers,
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onProgress: onProgress,
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},
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function (err, data) {
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if (!self._isRunningTask(TaskId)) return;
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if (err) {
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onProgress(null, true);
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return ep.emit('error', err);
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}
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ep.emit('upload_slice_complete', data);
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},
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);
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});
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// 开始获取文件 UploadId，里面会视情况计算 ETag，并比对，保证文件一致性，也优化上传
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ep.on('get_file_size_finish', function () {
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onProgress = util.throttleOnProgress.call(self, FileSize, params.onProgress);
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if (params.UploadData.UploadId) {
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ep.emit('get_upload_data_finish', params.UploadData);
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} else {
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var _params = util.extend(
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{
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TaskId: TaskId,
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Bucket: Bucket,
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Region: Region,
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Key: Key,
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Headers: params.Headers,
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StorageClass: StorageClass,
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FilePath: FilePath,
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FileSize: FileSize,
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SliceSize: ChunkSize,
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onHashProgress: onHashProgress,
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},
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params,
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);
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getUploadIdAndPartList.call(self, _params, function (err, UploadData) {
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if (!self._isRunningTask(TaskId)) return;
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if (err) return ep.emit('error', err);
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params.UploadData.UploadId = UploadData.UploadId;
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params.UploadData.PartList = UploadData.PartList;
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ep.emit('get_upload_data_finish', params.UploadData);
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});
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}
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});
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// 获取上传文件大小
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FileSize = params.ContentLength;
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delete params.ContentLength;
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!params.Headers && (params.Headers = {});
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util.each(params.Headers, function (item, key) {
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if (key.toLowerCase() === 'content-length') {
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delete params.Headers[key];
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}
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});
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// 控制分片大小
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(function () {
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var SIZE = [1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 1024 * 2, 1024 * 4, 1024 * 5];
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var AutoChunkSize = 1024 * 1024;
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for (var i = 0; i < SIZE.length; i++) {
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AutoChunkSize = SIZE[i] * 1024 * 1024;
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if (FileSize / AutoChunkSize <= self.options.MaxPartNumber) break;
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}
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params.ChunkSize = params.SliceSize = ChunkSize = Math.max(ChunkSize, AutoChunkSize);
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})();
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// 开始上传
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if (FileSize === 0) {
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params.Body = '';
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params.ContentLength = 0;
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params.SkipTask = true;
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self.putObject(params, callback);
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} else {
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ep.emit('get_file_size_finish');
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}
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}
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// 获取上传任务的 UploadId
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function getUploadIdAndPartList(params, callback) {
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var TaskId = params.TaskId;
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var Bucket = params.Bucket;
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var Region = params.Region;
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var Key = params.Key;
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var StorageClass = params.StorageClass;
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var self = this;
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// 计算 ETag
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var ETagMap = {};
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var FileSize = params.FileSize;
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var SliceSize = params.SliceSize;
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var SliceCount = Math.ceil(FileSize / SliceSize);
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var FinishSliceCount = 0;
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var FinishSize = 0;
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var onHashProgress = util.throttleOnProgress.call(self, FileSize, params.onHashProgress);
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var getChunkETag = function (PartNumber, callback) {
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var start = SliceSize * (PartNumber - 1);
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var end = Math.min(start + SliceSize, FileSize);
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var ChunkSize = end - start;
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if (ETagMap[PartNumber]) {
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callback(null, {
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PartNumber: PartNumber,
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ETag: ETagMap[PartNumber],
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Size: ChunkSize,
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});
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} else {
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util.fileSlice(params.FilePath, start, end, function (chunkItem) {
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util.getFileMd5(chunkItem, function (err, md5) {
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if (err) return callback(util.error(err));
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var ETag = '"' + md5 + '"';
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ETagMap[PartNumber] = ETag;
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FinishSliceCount += 1;
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FinishSize += ChunkSize;
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onHashProgress({ loaded: FinishSize, total: FileSize });
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callback(null, {
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PartNumber: PartNumber,
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ETag: ETag,
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Size: ChunkSize,
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});
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});
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});
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}
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};
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// 通过和文件的 md5 对比，判断 UploadId 是否可用
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var isAvailableUploadList = function (PartList, callback) {
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var PartCount = PartList.length;
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// 如果没有分片，通过
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if (PartCount === 0) {
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return callback(null, true);
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}
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// 检查分片数量
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if (PartCount > SliceCount) {
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return callback(null, false);
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}
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// 检查分片大小
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if (PartCount > 1) {
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var PartSliceSize = Math.max(PartList[0].Size, PartList[1].Size);
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if (PartSliceSize !== SliceSize) {
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return callback(null, false);
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}
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}
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// 逐个分片计算并检查 ETag 是否一致
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var next = function (index) {
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if (index < PartCount) {
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var Part = PartList[index];
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getChunkETag(Part.PartNumber, function (err, chunk) {
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if (chunk && chunk.ETag === Part.ETag && chunk.Size === Part.Size) {
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next(index + 1);
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} else {
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callback(null, false);
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}
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});
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} else {
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callback(null, true);
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}
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};
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next(0);
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};
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var ep = new EventProxy();
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ep.on('error', function (errData) {
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if (!self._isRunningTask(TaskId)) return;
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return callback(errData);
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});
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// 存在 UploadId
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ep.on('upload_id_available', function (UploadData) {
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// 转换成 map
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var map = {};
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var list = [];
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util.each(UploadData.PartList, function (item) {
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map[item.PartNumber] = item;
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});
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for (var PartNumber = 1; PartNumber <= SliceCount; PartNumber++) {
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var item = map[PartNumber];
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if (item) {
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item.PartNumber = PartNumber;
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item.Uploaded = true;
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} else {
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item = {
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PartNumber: PartNumber,
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ETag: null,
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Uploaded: false,
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};
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}
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list.push(item);
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}
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UploadData.PartList = list;
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callback(null, UploadData);
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});
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// 不存在 UploadId, 初始化生成 UploadId
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ep.on('no_available_upload_id', function () {
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if (!self._isRunningTask(TaskId)) return;
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var _params = util.extend(
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{
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Bucket: Bucket,
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Region: Region,
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Key: Key,
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Headers: util.clone(params.Headers),
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Query: util.clone(params.Query),
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StorageClass: StorageClass,
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},
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params,
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);
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self.multipartInit(_params, function (err, data) {
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if (!self._isRunningTask(TaskId)) return;
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if (err) return ep.emit('error', err);
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var UploadId = data.UploadId;
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if (!UploadId) {
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return callback(util.error(new Error('no such upload id')));
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}
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ep.emit('upload_id_available', { UploadId: UploadId, PartList: [] });
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});
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});
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// 如果已存在 UploadId，找一个可以用的 UploadId
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ep.on('has_and_check_upload_id', function (UploadIdList) {
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// 串行地，找一个内容一致的 UploadId
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UploadIdList = UploadIdList.reverse();
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Async.eachLimit(
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UploadIdList,
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1,
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function (UploadId, asyncCallback) {
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if (!self._isRunningTask(TaskId)) return;
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// 如果正在上传，跳过
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if (session.using[UploadId]) {
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asyncCallback(); // 检查下一个 UploadId
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return;
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}
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// 判断 UploadId 是否可用
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wholeMultipartListPart.call(
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self,
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{
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Bucket: Bucket,
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Region: Region,
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Key: Key,
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UploadId: UploadId,
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},
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function (err, PartListData) {
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if (!self._isRunningTask(TaskId)) return;
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if (err) {
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session.removeUsing(UploadId);
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return ep.emit('error', err);
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}
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var PartList = PartListData.PartList;
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PartList.forEach(function (item) {
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item.PartNumber *= 1;
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item.Size *= 1;
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item.ETag = item.ETag || '';
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});
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isAvailableUploadList(PartList, function (err, isAvailable) {
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if (!self._isRunningTask(TaskId)) return;
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if (err) return ep.emit('error', err);
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if (isAvailable) {
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asyncCallback({
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UploadId: UploadId,
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PartList: PartList,
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}); // 马上结束
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} else {
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asyncCallback(); // 检查下一个 UploadId
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}
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});
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},
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);
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},
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function (AvailableUploadData) {
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if (!self._isRunningTask(TaskId)) return;
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onHashProgress(null, true);
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if (AvailableUploadData && AvailableUploadData.UploadId) {
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ep.emit('upload_id_available', AvailableUploadData);
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} else {
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ep.emit('no_available_upload_id');
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}
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},
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);
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});
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// 在本地缓存找可用的 UploadId
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ep.on('seek_local_avail_upload_id', function (RemoteUploadIdList) {
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// 在本地找可用的 UploadId
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var uuid = session.getFileId(params.FileStat, params.ChunkSize, Bucket, Key);
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var LocalUploadIdList = session.getUploadIdList.call(self, uuid);
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if (!uuid || !LocalUploadIdList) {
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ep.emit('has_and_check_upload_id', RemoteUploadIdList);
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return;
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}
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var next = function (index) {
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// 如果本地找不到可用 UploadId，再一个个遍历校验远端
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if (index >= LocalUploadIdList.length) {
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ep.emit('has_and_check_upload_id', RemoteUploadIdList);
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return;
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}
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var UploadId = LocalUploadIdList[index];
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// 如果不在远端 UploadId 列表里，跳过并删除
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if (!util.isInArray(RemoteUploadIdList, UploadId)) {
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session.removeUploadId.call(self, UploadId);
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next(index + 1);
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return;
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}
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// 如果正在上传，跳过
|
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if (session.using[UploadId]) {
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next(index + 1);
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return;
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}
|
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// 判断 UploadId 是否存在线上
|
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wholeMultipartListPart.call(
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self,
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{
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Bucket: Bucket,
|
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Region: Region,
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Key: Key,
|
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UploadId: UploadId,
|
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},
|
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function (err, PartListData) {
|
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if (!self._isRunningTask(TaskId)) return;
|
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if (err) {
|
||
// 如果 UploadId 获取会出错，跳过并删除
|
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session.removeUploadId.call(self, UploadId);
|
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next(index + 1);
|
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} else {
|
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// 找到可用 UploadId
|
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ep.emit('upload_id_available', {
|
||
UploadId: UploadId,
|
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PartList: PartListData.PartList,
|
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});
|
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}
|
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},
|
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);
|
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};
|
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next(0);
|
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});
|
||
|
||
// 获取线上 UploadId 列表
|
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ep.on('get_remote_upload_id_list', function () {
|
||
// 获取符合条件的 UploadId 列表，因为同一个文件可以有多个上传任务。
|
||
wholeMultipartList.call(
|
||
self,
|
||
{
|
||
Bucket: Bucket,
|
||
Region: Region,
|
||
Key: Key,
|
||
},
|
||
function (err, data) {
|
||
if (!self._isRunningTask(TaskId)) return;
|
||
if (err) return ep.emit('error', err);
|
||
// 整理远端 UploadId 列表
|
||
var RemoteUploadIdList = util
|
||
.filter(data.UploadList, function (item) {
|
||
return (
|
||
item.Key === Key && (!StorageClass || item.StorageClass.toUpperCase() === StorageClass.toUpperCase())
|
||
);
|
||
})
|
||
.reverse()
|
||
.map(function (item) {
|
||
return item.UploadId || item.UploadID;
|
||
});
|
||
if (RemoteUploadIdList.length) {
|
||
ep.emit('seek_local_avail_upload_id', RemoteUploadIdList);
|
||
} else {
|
||
// 远端没有 UploadId，清理缓存的 UploadId
|
||
var uuid = session.getFileId(params.FileStat, params.ChunkSize, Bucket, Key),
|
||
LocalUploadIdList;
|
||
if (uuid && (LocalUploadIdList = session.getUploadIdList.call(self, uuid))) {
|
||
util.each(LocalUploadIdList, function (UploadId) {
|
||
session.removeUploadId.call(self, UploadId);
|
||
});
|
||
}
|
||
ep.emit('no_available_upload_id');
|
||
}
|
||
},
|
||
);
|
||
});
|
||
|
||
// 开始找可用 UploadId
|
||
ep.emit('get_remote_upload_id_list');
|
||
}
|
||
|
||
// 获取符合条件的全部上传任务 (条件包括 Bucket, Region, Prefix)
|
||
function wholeMultipartList(params, callback) {
|
||
var self = this;
|
||
var UploadList = [];
|
||
var sendParams = {
|
||
Bucket: params.Bucket,
|
||
Region: params.Region,
|
||
Prefix: params.Key,
|
||
};
|
||
var next = function () {
|
||
self.multipartList(sendParams, function (err, data) {
|
||
if (err) return callback(err);
|
||
UploadList.push.apply(UploadList, data.Upload || []);
|
||
if (data.IsTruncated === 'true') {
|
||
// 列表不完整
|
||
sendParams.KeyMarker = data.NextKeyMarker;
|
||
sendParams.UploadIdMarker = data.NextUploadIdMarker;
|
||
next();
|
||
} else {
|
||
callback(null, { UploadList: UploadList });
|
||
}
|
||
});
|
||
};
|
||
next();
|
||
}
|
||
|
||
// 获取指定上传任务的分块列表
|
||
function wholeMultipartListPart(params, callback) {
|
||
var self = this;
|
||
var PartList = [];
|
||
var sendParams = {
|
||
Bucket: params.Bucket,
|
||
Region: params.Region,
|
||
Key: params.Key,
|
||
UploadId: params.UploadId,
|
||
};
|
||
var next = function () {
|
||
self.multipartListPart(sendParams, function (err, data) {
|
||
if (err) return callback(err);
|
||
PartList.push.apply(PartList, data.Part || []);
|
||
if (data.IsTruncated === 'true') {
|
||
// 列表不完整
|
||
sendParams.PartNumberMarker = data.NextPartNumberMarker;
|
||
next();
|
||
} else {
|
||
callback(null, { PartList: PartList });
|
||
}
|
||
});
|
||
};
|
||
next();
|
||
}
|
||
|
||
// 上传文件分块，包括
|
||
/*
|
||
UploadId (上传任务编号)
|
||
AsyncLimit (并发量)，
|
||
SliceList (上传的分块数组)，
|
||
FilePath (本地文件的位置)，
|
||
SliceSize (文件分块大小)
|
||
FileSize (文件大小)
|
||
onProgress (上传成功之后的回调函数)
|
||
*/
|
||
function uploadSliceList(params, cb) {
|
||
var self = this;
|
||
var TaskId = params.TaskId;
|
||
var Bucket = params.Bucket;
|
||
var Region = params.Region;
|
||
var Key = params.Key;
|
||
var UploadData = params.UploadData;
|
||
var FileSize = params.FileSize;
|
||
var SliceSize = params.SliceSize;
|
||
var ChunkParallel = Math.min(params.AsyncLimit || self.options.ChunkParallelLimit || 1, 256);
|
||
var FilePath = params.FilePath;
|
||
var SliceCount = Math.ceil(FileSize / SliceSize);
|
||
var FinishSize = 0;
|
||
var ServerSideEncryption = params.ServerSideEncryption;
|
||
var needUploadSlices = util.filter(UploadData.PartList, function (SliceItem) {
|
||
if (SliceItem['Uploaded']) {
|
||
FinishSize += SliceItem['PartNumber'] >= SliceCount ? FileSize % SliceSize || SliceSize : SliceSize;
|
||
}
|
||
return !SliceItem['Uploaded'];
|
||
});
|
||
var onProgress = params.onProgress;
|
||
|
||
Async.eachLimit(
|
||
needUploadSlices,
|
||
ChunkParallel,
|
||
function (SliceItem, asyncCallback) {
|
||
if (!self._isRunningTask(TaskId)) return;
|
||
var PartNumber = SliceItem['PartNumber'];
|
||
var currentSize =
|
||
Math.min(FileSize, SliceItem['PartNumber'] * SliceSize) - (SliceItem['PartNumber'] - 1) * SliceSize;
|
||
var preAddSize = 0;
|
||
uploadSliceItem.call(
|
||
self,
|
||
{
|
||
TaskId: TaskId,
|
||
Bucket: Bucket,
|
||
Region: Region,
|
||
Key: Key,
|
||
SliceSize: SliceSize,
|
||
FileSize: FileSize,
|
||
PartNumber: PartNumber,
|
||
ServerSideEncryption: ServerSideEncryption,
|
||
FilePath: FilePath,
|
||
UploadData: UploadData,
|
||
Headers: params.Headers,
|
||
onProgress: function (data) {
|
||
FinishSize += data.loaded - preAddSize;
|
||
preAddSize = data.loaded;
|
||
onProgress({ loaded: FinishSize, total: FileSize });
|
||
},
|
||
},
|
||
function (err, data) {
|
||
if (!self._isRunningTask(TaskId)) return;
|
||
if (err) {
|
||
FinishSize -= preAddSize;
|
||
} else {
|
||
FinishSize += currentSize - preAddSize;
|
||
SliceItem.ETag = data.ETag;
|
||
}
|
||
onProgress({ loaded: FinishSize, total: FileSize });
|
||
asyncCallback(err || null, data);
|
||
},
|
||
);
|
||
},
|
||
function (err) {
|
||
if (!self._isRunningTask(TaskId)) return;
|
||
if (err) return cb(err);
|
||
cb(null, {
|
||
UploadId: UploadData.UploadId,
|
||
SliceList: UploadData.PartList,
|
||
});
|
||
},
|
||
);
|
||
}
|
||
|
||
// 上传指定分片
|
||
function uploadSliceItem(params, callback) {
|
||
var self = this;
|
||
var TaskId = params.TaskId;
|
||
var Bucket = params.Bucket;
|
||
var Region = params.Region;
|
||
var Key = params.Key;
|
||
var FileSize = params.FileSize;
|
||
var FilePath = params.FilePath;
|
||
var PartNumber = params.PartNumber * 1;
|
||
var SliceSize = params.SliceSize;
|
||
var ServerSideEncryption = params.ServerSideEncryption;
|
||
var UploadData = params.UploadData;
|
||
var ChunkRetryTimes = self.options.ChunkRetryTimes + 1;
|
||
var Headers = params.Headers || {};
|
||
|
||
var start = SliceSize * (PartNumber - 1);
|
||
|
||
var ContentLength = SliceSize;
|
||
|
||
var end = start + SliceSize;
|
||
|
||
if (end > FileSize) {
|
||
end = FileSize;
|
||
ContentLength = end - start;
|
||
}
|
||
|
||
var headersWhiteList = ['x-cos-traffic-limit', 'x-cos-mime-limit'];
|
||
var headers = {};
|
||
util.each(Headers, function (v, k) {
|
||
if (headersWhiteList.indexOf(k) > -1) {
|
||
headers[k] = v;
|
||
}
|
||
});
|
||
|
||
util.fileSlice(FilePath, start, end, function (md5Body) {
|
||
util.getFileMd5(md5Body, function (err, md5) {
|
||
var contentMd5 = md5 ? util.binaryBase64(md5) : '';
|
||
var PartItem = UploadData.PartList[PartNumber - 1];
|
||
Async.retry(
|
||
ChunkRetryTimes,
|
||
function (tryCallback) {
|
||
if (!self._isRunningTask(TaskId)) return;
|
||
util.fileSlice(FilePath, start, end, function (Body) {
|
||
self.multipartUpload(
|
||
{
|
||
TaskId: TaskId,
|
||
Bucket: Bucket,
|
||
Region: Region,
|
||
Key: Key,
|
||
ContentLength: ContentLength,
|
||
PartNumber: PartNumber,
|
||
UploadId: UploadData.UploadId,
|
||
ServerSideEncryption: ServerSideEncryption,
|
||
Body: Body,
|
||
Headers: headers,
|
||
onProgress: params.onProgress,
|
||
ContentMD5: contentMd5,
|
||
},
|
||
function (err, data) {
|
||
if (!self._isRunningTask(TaskId)) return;
|
||
if (err) return tryCallback(err);
|
||
PartItem.Uploaded = true;
|
||
return tryCallback(null, data);
|
||
},
|
||
);
|
||
});
|
||
},
|
||
function (err, data) {
|
||
if (!self._isRunningTask(TaskId)) return;
|
||
return callback(err, data);
|
||
},
|
||
);
|
||
});
|
||
});
|
||
}
|
||
|
||
// 完成分块上传
|
||
function uploadSliceComplete(params, callback) {
|
||
var Bucket = params.Bucket;
|
||
var Region = params.Region;
|
||
var Key = params.Key;
|
||
var UploadId = params.UploadId;
|
||
var SliceList = params.SliceList;
|
||
var self = this;
|
||
var ChunkRetryTimes = this.options.ChunkRetryTimes + 1;
|
||
var Headers = params.Headers;
|
||
var Parts = SliceList.map(function (item) {
|
||
return {
|
||
PartNumber: item.PartNumber,
|
||
ETag: item.ETag,
|
||
};
|
||
});
|
||
// 完成上传的请求也做重试
|
||
Async.retry(
|
||
ChunkRetryTimes,
|
||
function (tryCallback) {
|
||
self.multipartComplete(
|
||
{
|
||
Bucket: Bucket,
|
||
Region: Region,
|
||
Key: Key,
|
||
UploadId: UploadId,
|
||
Parts: Parts,
|
||
Headers: Headers,
|
||
},
|
||
tryCallback,
|
||
);
|
||
},
|
||
function (err, data) {
|
||
callback(err, data);
|
||
},
|
||
);
|
||
}
|
||
|
||
// 抛弃分块上传任务
|
||
/*
|
||
AsyncLimit (抛弃上传任务的并发量)，
|
||
UploadId (上传任务的编号，当 Level 为 task 时候需要)
|
||
Level (抛弃分块上传任务的级别，task : 抛弃指定的上传任务，file ： 抛弃指定的文件对应的上传任务，其他值 ：抛弃指定Bucket 的全部上传任务)
|
||
*/
|
||
function abortUploadTask(params, callback) {
|
||
var Bucket = params.Bucket;
|
||
var Region = params.Region;
|
||
var Key = params.Key;
|
||
var UploadId = params.UploadId;
|
||
var Level = params.Level || 'task';
|
||
var AsyncLimit = params.AsyncLimit;
|
||
var self = this;
|
||
|
||
var ep = new EventProxy();
|
||
|
||
ep.on('error', function (errData) {
|
||
return callback(errData);
|
||
});
|
||
|
||
// 已经获取到需要抛弃的任务列表
|
||
ep.on('get_abort_array', function (AbortArray) {
|
||
abortUploadTaskArray.call(
|
||
self,
|
||
{
|
||
Bucket: Bucket,
|
||
Region: Region,
|
||
Key: Key,
|
||
Headers: params.Headers,
|
||
AsyncLimit: AsyncLimit,
|
||
AbortArray: AbortArray,
|
||
},
|
||
callback,
|
||
);
|
||
});
|
||
|
||
if (Level === 'bucket') {
|
||
// Bucket 级别的任务抛弃，抛弃该 Bucket 下的全部上传任务
|
||
wholeMultipartList.call(
|
||
self,
|
||
{
|
||
Bucket: Bucket,
|
||
Region: Region,
|
||
},
|
||
function (err, data) {
|
||
if (err) return callback(err);
|
||
ep.emit('get_abort_array', data.UploadList || []);
|
||
},
|
||
);
|
||
} else if (Level === 'file') {
|
||
// 文件级别的任务抛弃，抛弃该文件的全部上传任务
|
||
if (!Key) return callback(util.error(new Error('abort_upload_task_no_key')));
|
||
wholeMultipartList.call(
|
||
self,
|
||
{
|
||
Bucket: Bucket,
|
||
Region: Region,
|
||
Key: Key,
|
||
},
|
||
function (err, data) {
|
||
if (err) return callback(err);
|
||
ep.emit('get_abort_array', data.UploadList || []);
|
||
},
|
||
);
|
||
} else if (Level === 'task') {
|
||
// 单个任务级别的任务抛弃，抛弃指定 UploadId 的上传任务
|
||
if (!UploadId) return callback(util.error(new Error('abort_upload_task_no_id')));
|
||
if (!Key) return callback(util.error(new Error('abort_upload_task_no_key')));
|
||
ep.emit('get_abort_array', [
|
||
{
|
||
Key: Key,
|
||
UploadId: UploadId,
|
||
},
|
||
]);
|
||
} else {
|
||
return callback(util.error(new Error('abort_unknown_level')));
|
||
}
|
||
}
|
||
|
||
// 批量抛弃分块上传任务
|
||
function abortUploadTaskArray(params, callback) {
|
||
var Bucket = params.Bucket;
|
||
var Region = params.Region;
|
||
var Key = params.Key;
|
||
var AbortArray = params.AbortArray;
|
||
var AsyncLimit = params.AsyncLimit || 1;
|
||
var self = this;
|
||
|
||
var index = 0;
|
||
var resultList = new Array(AbortArray.length);
|
||
Async.eachLimit(
|
||
AbortArray,
|
||
AsyncLimit,
|
||
function (AbortItem, nextItem) {
|
||
var eachIndex = index;
|
||
if (Key && Key !== AbortItem.Key) {
|
||
resultList[eachIndex] = { error: { KeyNotMatch: true } };
|
||
nextItem(null);
|
||
return;
|
||
}
|
||
var UploadId = AbortItem.UploadId || AbortItem.UploadID;
|
||
|
||
self.multipartAbort(
|
||
{
|
||
Bucket: Bucket,
|
||
Region: Region,
|
||
Key: AbortItem.Key,
|
||
Headers: params.Headers,
|
||
UploadId: UploadId,
|
||
},
|
||
function (err) {
|
||
var task = {
|
||
Bucket: Bucket,
|
||
Region: Region,
|
||
Key: AbortItem.Key,
|
||
UploadId: UploadId,
|
||
};
|
||
resultList[eachIndex] = { error: err, task: task };
|
||
nextItem(null);
|
||
},
|
||
);
|
||
index++;
|
||
},
|
||
function (err) {
|
||
if (err) return callback(err);
|
||
|
||
var successList = [];
|
||
var errorList = [];
|
||
|
||
for (var i = 0, len = resultList.length; i < len; i++) {
|
||
var item = resultList[i];
|
||
if (item['task']) {
|
||
if (item['error']) {
|
||
errorList.push(item['task']);
|
||
} else {
|
||
successList.push(item['task']);
|
||
}
|
||
}
|
||
}
|
||
|
||
return callback(null, {
|
||
successList: successList,
|
||
errorList: errorList,
|
||
});
|
||
},
|
||
);
|
||
}
|
||
|
||
// 高级上传
|
||
function uploadFile(params, callback) {
|
||
var self = this;
|
||
|
||
// 判断多大的文件使用分片上传
|
||
var SliceSize = params.SliceSize === undefined ? self.options.SliceSize : params.SliceSize;
|
||
|
||
// 开始处理每个文件
|
||
var taskList = [];
|
||
|
||
fs.stat(params.FilePath, function (err, stat) {
|
||
if (err) {
|
||
return callback(err);
|
||
}
|
||
|
||
var isDir = stat.isDirectory();
|
||
var FileSize = (params.ContentLength = stat.size || 0);
|
||
var fileInfo = { TaskId: '' };
|
||
|
||
// 整理 option，用于返回给回调
|
||
util.each(params, function (v, k) {
|
||
if (typeof v !== 'object' && typeof v !== 'function') {
|
||
fileInfo[k] = v;
|
||
}
|
||
});
|
||
|
||
// 处理文件 TaskReady
|
||
var _onTaskReady = params.onTaskReady;
|
||
var onTaskReady = function (tid) {
|
||
fileInfo.TaskId = tid;
|
||
_onTaskReady && _onTaskReady(tid);
|
||
};
|
||
params.onTaskReady = onTaskReady;
|
||
|
||
// 处理文件完成
|
||
var _onFileFinish = params.onFileFinish;
|
||
var onFileFinish = function (err, data) {
|
||
_onFileFinish && _onFileFinish(err, data, fileInfo);
|
||
callback && callback(err, data);
|
||
};
|
||
|
||
// 添加上传任务
|
||
var api = FileSize <= SliceSize || isDir ? 'putObject' : 'sliceUploadFile';
|
||
if (api === 'putObject') {
|
||
params.Body = isDir ? '' : fs.createReadStream(params.FilePath);
|
||
params.Body.isSdkCreated = true;
|
||
}
|
||
taskList.push({
|
||
api: api,
|
||
params: params,
|
||
callback: onFileFinish,
|
||
});
|
||
self._addTasks(taskList);
|
||
});
|
||
}
|
||
|
||
// 批量上传文件
|
||
function uploadFiles(params, callback) {
|
||
var self = this;
|
||
|
||
// 判断多大的文件使用分片上传
|
||
var SliceSize = params.SliceSize === undefined ? self.options.SliceSize : params.SliceSize;
|
||
|
||
// 汇总返回进度
|
||
var TotalSize = 0;
|
||
var TotalFinish = 0;
|
||
var onTotalProgress = util.throttleOnProgress.call(self, TotalFinish, params.onProgress);
|
||
|
||
// 汇总返回回调
|
||
var unFinishCount = params.files.length;
|
||
var _onTotalFileFinish = params.onFileFinish;
|
||
var resultList = Array(unFinishCount);
|
||
var onTotalFileFinish = function (err, data, options) {
|
||
onTotalProgress(null, true);
|
||
_onTotalFileFinish && _onTotalFileFinish(err, data, options);
|
||
resultList[options.Index] = {
|
||
options: options,
|
||
error: err,
|
||
data: data,
|
||
};
|
||
if (--unFinishCount <= 0 && callback) {
|
||
callback(null, { files: resultList });
|
||
}
|
||
};
|
||
|
||
// 开始处理每个文件
|
||
var taskList = [];
|
||
var count = params.files.length;
|
||
util.each(params.files, function (fileParams, index) {
|
||
fs.stat(fileParams.FilePath, function (err, stat) {
|
||
var isDir = stat ? stat.isDirectory() : false;
|
||
var FileSize = (fileParams.ContentLength = stat ? stat.size : 0);
|
||
var fileInfo = { Index: index, TaskId: '' };
|
||
|
||
// 更新文件总大小
|
||
TotalSize += FileSize;
|
||
|
||
// 整理 option，用于返回给回调
|
||
util.each(fileParams, function (v, k) {
|
||
if (typeof v !== 'object' && typeof v !== 'function') {
|
||
fileInfo[k] = v;
|
||
}
|
||
});
|
||
|
||
// 处理单个文件 TaskReady
|
||
var _onTaskReady = fileParams.onTaskReady;
|
||
var onTaskReady = function (tid) {
|
||
fileInfo.TaskId = tid;
|
||
_onTaskReady && _onTaskReady(tid);
|
||
};
|
||
fileParams.onTaskReady = onTaskReady;
|
||
|
||
// 处理单个文件进度
|
||
var PreAddSize = 0;
|
||
var _onProgress = fileParams.onProgress;
|
||
var onProgress = function (info) {
|
||
TotalFinish = TotalFinish - PreAddSize + info.loaded;
|
||
PreAddSize = info.loaded;
|
||
_onProgress && _onProgress(info);
|
||
onTotalProgress({ loaded: TotalFinish, total: TotalSize });
|
||
};
|
||
fileParams.onProgress = onProgress;
|
||
|
||
// 处理单个文件完成
|
||
var _onFileFinish = fileParams.onFileFinish;
|
||
var onFileFinish = function (err, data) {
|
||
_onFileFinish && _onFileFinish(err, data);
|
||
onTotalFileFinish && onTotalFileFinish(err, data, fileInfo);
|
||
};
|
||
|
||
// 添加上传任务
|
||
var api = FileSize <= SliceSize || isDir ? 'putObject' : 'sliceUploadFile';
|
||
if (api === 'putObject') {
|
||
fileParams.Body = isDir ? '' : fs.createReadStream(fileParams.FilePath);
|
||
fileParams.Body.isSdkCreated = true;
|
||
}
|
||
taskList.push({
|
||
api: api,
|
||
params: fileParams,
|
||
callback: onFileFinish,
|
||
});
|
||
--count === 0 && self._addTasks(taskList);
|
||
});
|
||
});
|
||
}
|
||
|
||
// 分片复制文件
|
||
function sliceCopyFile(params, callback) {
|
||
var ep = new EventProxy();
|
||
|
||
var self = this;
|
||
var Bucket = params.Bucket;
|
||
var Region = params.Region;
|
||
var Key = params.Key;
|
||
var CopySource = params.CopySource;
|
||
var m = util.getSourceParams.call(this, CopySource);
|
||
if (!m) {
|
||
callback(util.error(new Error('CopySource format error')));
|
||
return;
|
||
}
|
||
|
||
var SourceBucket = m.Bucket;
|
||
var SourceRegion = m.Region;
|
||
var SourceKey = decodeURIComponent(m.Key);
|
||
var CopySliceSize = params.CopySliceSize === undefined ? self.options.CopySliceSize : params.CopySliceSize;
|
||
CopySliceSize = Math.max(0, CopySliceSize);
|
||
|
||
var ChunkSize = params.CopyChunkSize || this.options.CopyChunkSize;
|
||
var ChunkParallel = this.options.CopyChunkParallelLimit;
|
||
var ChunkRetryTimes = this.options.ChunkRetryTimes + 1;
|
||
|
||
var ChunkCount = 0;
|
||
var FinishSize = 0;
|
||
var FileSize;
|
||
var onProgress;
|
||
var SourceResHeaders = {};
|
||
var SourceHeaders = {};
|
||
var TargetHeader = {};
|
||
|
||
// 分片复制完成，开始 multipartComplete 操作
|
||
ep.on('copy_slice_complete', function (UploadData) {
|
||
var metaHeaders = {};
|
||
util.each(params.Headers, function (val, k) {
|
||
if (k.toLowerCase().indexOf('x-cos-meta-') === 0) metaHeaders[k] = val;
|
||
});
|
||
var Parts = util.map(UploadData.PartList, function (item) {
|
||
return {
|
||
PartNumber: item.PartNumber,
|
||
ETag: item.ETag,
|
||
};
|
||
});
|
||
// 完成上传的请求也做重试
|
||
Async.retry(
|
||
ChunkRetryTimes,
|
||
function (tryCallback) {
|
||
self.multipartComplete(
|
||
{
|
||
Bucket: Bucket,
|
||
Region: Region,
|
||
Key: Key,
|
||
UploadId: UploadData.UploadId,
|
||
Parts: Parts,
|
||
},
|
||
tryCallback,
|
||
);
|
||
},
|
||
function (err, data) {
|
||
session.removeUsing(UploadData.UploadId); // 标记 UploadId 没被使用了，因为复制没提供重试，所以只要出错，就是 UploadId 停用了。
|
||
if (err) {
|
||
onProgress(null, true);
|
||
return callback(err);
|
||
}
|
||
session.removeUploadId.call(self, UploadData.UploadId);
|
||
onProgress({ loaded: FileSize, total: FileSize }, true);
|
||
callback(null, data);
|
||
},
|
||
);
|
||
});
|
||
|
||
ep.on('get_copy_data_finish', function (UploadData) {
|
||
// 处理 UploadId 缓存
|
||
var uuid = session.getCopyFileId(CopySource, SourceResHeaders, ChunkSize, Bucket, Key);
|
||
uuid && session.saveUploadId.call(self, uuid, UploadData.UploadId, self.options.UploadIdCacheLimit); // 缓存 UploadId
|
||
session.setUsing(UploadData.UploadId); // 标记 UploadId 为正在使用
|
||
|
||
var needCopySlices = util.filter(UploadData.PartList, function (SliceItem) {
|
||
if (SliceItem['Uploaded']) {
|
||
FinishSize += SliceItem['PartNumber'] >= ChunkCount ? FileSize % ChunkSize || ChunkSize : ChunkSize;
|
||
}
|
||
return !SliceItem['Uploaded'];
|
||
});
|
||
Async.eachLimit(
|
||
needCopySlices,
|
||
ChunkParallel,
|
||
function (SliceItem, asyncCallback) {
|
||
var PartNumber = SliceItem.PartNumber;
|
||
var CopySourceRange = SliceItem.CopySourceRange;
|
||
var currentSize = SliceItem.end - SliceItem.start;
|
||
Async.retry(
|
||
ChunkRetryTimes,
|
||
function (tryCallback) {
|
||
copySliceItem.call(
|
||
self,
|
||
{
|
||
Bucket: Bucket,
|
||
Region: Region,
|
||
Key: Key,
|
||
CopySource: CopySource,
|
||
UploadId: UploadData.UploadId,
|
||
PartNumber: PartNumber,
|
||
CopySourceRange: CopySourceRange,
|
||
},
|
||
tryCallback,
|
||
);
|
||
},
|
||
function (err, data) {
|
||
if (err) return asyncCallback(err);
|
||
FinishSize += currentSize;
|
||
onProgress({ loaded: FinishSize, total: FileSize });
|
||
SliceItem.ETag = data.ETag;
|
||
asyncCallback(err || null, data);
|
||
},
|
||
);
|
||
},
|
||
function (err) {
|
||
if (err) {
|
||
session.removeUsing(UploadData.UploadId); // 标记 UploadId 没被使用了，因为复制没提供重试，所以只要出错，就是 UploadId 停用了。
|
||
onProgress(null, true);
|
||
return callback(err);
|
||
}
|
||
ep.emit('copy_slice_complete', UploadData);
|
||
},
|
||
);
|
||
});
|
||
|
||
ep.on('get_chunk_size_finish', function () {
|
||
var createNewUploadId = function () {
|
||
self.multipartInit(
|
||
{
|
||
Bucket: Bucket,
|
||
Region: Region,
|
||
Key: Key,
|
||
Headers: TargetHeader,
|
||
},
|
||
function (err, data) {
|
||
if (err) return callback(err);
|
||
params.UploadId = data.UploadId;
|
||
ep.emit('get_copy_data_finish', { UploadId: params.UploadId, PartList: params.PartList });
|
||
},
|
||
);
|
||
};
|
||
|
||
// 在本地找可用的 UploadId
|
||
var uuid = session.getCopyFileId(CopySource, SourceResHeaders, ChunkSize, Bucket, Key);
|
||
var LocalUploadIdList = session.getUploadIdList.call(self, uuid);
|
||
if (!uuid || !LocalUploadIdList) return createNewUploadId();
|
||
|
||
var next = function (index) {
|
||
// 如果本地找不到可用 UploadId，再一个个遍历校验远端
|
||
if (index >= LocalUploadIdList.length) return createNewUploadId();
|
||
var UploadId = LocalUploadIdList[index];
|
||
// 如果正在被使用，跳过
|
||
if (session.using[UploadId]) return next(index + 1);
|
||
// 判断 UploadId 是否存在线上
|
||
wholeMultipartListPart.call(
|
||
self,
|
||
{
|
||
Bucket: Bucket,
|
||
Region: Region,
|
||
Key: Key,
|
||
UploadId: UploadId,
|
||
},
|
||
function (err, PartListData) {
|
||
if (err) {
|
||
// 如果 UploadId 获取会出错，跳过并删除
|
||
session.removeUploadId.call(self, UploadId);
|
||
next(index + 1);
|
||
} else {
|
||
// 如果异步回来 UploadId 已经被用了，也跳过
|
||
if (session.using[UploadId]) return next(index + 1);
|
||
// 找到可用 UploadId
|
||
var finishETagMap = {};
|
||
var offset = 0;
|
||
util.each(PartListData.PartList, function (PartItem) {
|
||
var size = parseInt(PartItem.Size);
|
||
var end = offset + size - 1;
|
||
finishETagMap[PartItem.PartNumber + '|' + offset + '|' + end] = PartItem.ETag;
|
||
offset += size;
|
||
});
|
||
util.each(params.PartList, function (PartItem) {
|
||
var ETag = finishETagMap[PartItem.PartNumber + '|' + PartItem.start + '|' + PartItem.end];
|
||
if (ETag) {
|
||
PartItem.ETag = ETag;
|
||
PartItem.Uploaded = true;
|
||
}
|
||
});
|
||
ep.emit('get_copy_data_finish', { UploadId: UploadId, PartList: params.PartList });
|
||
}
|
||
},
|
||
);
|
||
};
|
||
next(0);
|
||
});
|
||
|
||
ep.on('get_file_size_finish', function () {
|
||
// 控制分片大小
|
||
(function () {
|
||
var SIZE = [1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 1024 * 2, 1024 * 4, 1024 * 5];
|
||
var AutoChunkSize = 1024 * 1024;
|
||
for (var i = 0; i < SIZE.length; i++) {
|
||
AutoChunkSize = SIZE[i] * 1024 * 1024;
|
||
if (FileSize / AutoChunkSize <= self.options.MaxPartNumber) break;
|
||
}
|
||
params.ChunkSize = ChunkSize = Math.max(ChunkSize, AutoChunkSize);
|
||
ChunkCount = Math.ceil(FileSize / ChunkSize);
|
||
|
||
var list = [];
|
||
for (var partNumber = 1; partNumber <= ChunkCount; partNumber++) {
|
||
var start = (partNumber - 1) * ChunkSize;
|
||
var end = partNumber * ChunkSize < FileSize ? partNumber * ChunkSize - 1 : FileSize - 1;
|
||
var item = {
|
||
PartNumber: partNumber,
|
||
start: start,
|
||
end: end,
|
||
CopySourceRange: 'bytes=' + start + '-' + end,
|
||
};
|
||
list.push(item);
|
||
}
|
||
params.PartList = list;
|
||
})();
|
||
|
||
if (params.Headers['x-cos-metadata-directive'] === 'Replaced') {
|
||
TargetHeader = params.Headers;
|
||
} else {
|
||
TargetHeader = SourceHeaders;
|
||
}
|
||
TargetHeader['x-cos-storage-class'] = params.Headers['x-cos-storage-class'] || SourceHeaders['x-cos-storage-class'];
|
||
TargetHeader = util.clearKey(TargetHeader);
|
||
/**
|
||
* 对于归档存储的对象，如果未恢复副本，则不允许 Copy
|
||
*/
|
||
if (SourceHeaders['x-cos-storage-class'] === 'ARCHIVE' || SourceHeaders['x-cos-storage-class'] === 'DEEP_ARCHIVE') {
|
||
var restoreHeader = SourceHeaders['x-cos-restore'];
|
||
if (!restoreHeader || restoreHeader === 'ongoing-request="true"') {
|
||
callback(util.error(new Error('Unrestored archive object is not allowed to be copied')));
|
||
return;
|
||
}
|
||
}
|
||
/**
|
||
* 去除一些无用的头部，规避 multipartInit 出错
|
||
* 这些头部通常是在 putObjectCopy 时才使用
|
||
*/
|
||
delete TargetHeader['x-cos-copy-source'];
|
||
delete TargetHeader['x-cos-metadata-directive'];
|
||
delete TargetHeader['x-cos-copy-source-If-Modified-Since'];
|
||
delete TargetHeader['x-cos-copy-source-If-Unmodified-Since'];
|
||
delete TargetHeader['x-cos-copy-source-If-Match'];
|
||
delete TargetHeader['x-cos-copy-source-If-None-Match'];
|
||
ep.emit('get_chunk_size_finish');
|
||
});
|
||
|
||
// 获取远端复制源文件的大小
|
||
self.headObject(
|
||
{
|
||
Bucket: SourceBucket,
|
||
Region: SourceRegion,
|
||
Key: SourceKey,
|
||
},
|
||
function (err, data) {
|
||
if (err) {
|
||
if (err.statusCode && err.statusCode === 404) {
|
||
callback(util.error(err, { ErrorStatus: SourceKey + ' Not Exist' }));
|
||
} else {
|
||
callback(err);
|
||
}
|
||
return;
|
||
}
|
||
|
||
FileSize = params.FileSize = data.headers['content-length'];
|
||
if (FileSize === undefined || !FileSize) {
|
||
callback(
|
||
util.error(
|
||
new Error(
|
||
'get Content-Length error, please add "Content-Length" to CORS ExposeHeader setting.（ 获取Content-Length失败，请在CORS ExposeHeader设置中添加Content-Length，请参考文档：https://cloud.tencent.com/document/product/436/13318 ）',
|
||
),
|
||
),
|
||
);
|
||
return;
|
||
}
|
||
|
||
onProgress = util.throttleOnProgress.call(self, FileSize, params.onProgress);
|
||
|
||
// 开始上传
|
||
if (FileSize <= CopySliceSize) {
|
||
if (!params.Headers['x-cos-metadata-directive']) {
|
||
params.Headers['x-cos-metadata-directive'] = 'Copy';
|
||
}
|
||
self.putObjectCopy(params, function (err, data) {
|
||
if (err) {
|
||
onProgress(null, true);
|
||
return callback(err);
|
||
}
|
||
onProgress({ loaded: FileSize, total: FileSize }, true);
|
||
callback(err, data);
|
||
});
|
||
} else {
|
||
var resHeaders = data.headers;
|
||
SourceResHeaders = resHeaders;
|
||
SourceHeaders = {
|
||
'Cache-Control': resHeaders['cache-control'],
|
||
'Content-Disposition': resHeaders['content-disposition'],
|
||
'Content-Encoding': resHeaders['content-encoding'],
|
||
'Content-Type': resHeaders['content-type'],
|
||
Expires: resHeaders['expires'],
|
||
'x-cos-storage-class': resHeaders['x-cos-storage-class'],
|
||
};
|
||
util.each(resHeaders, function (v, k) {
|
||
var metaPrefix = 'x-cos-meta-';
|
||
if (k.indexOf(metaPrefix) === 0 && k.length > metaPrefix.length) {
|
||
SourceHeaders[k] = v;
|
||
}
|
||
});
|
||
ep.emit('get_file_size_finish');
|
||
}
|
||
},
|
||
);
|
||
}
|
||
|
||
// 复制指定分片
|
||
function copySliceItem(params, callback) {
|
||
var TaskId = params.TaskId;
|
||
var Bucket = params.Bucket;
|
||
var Region = params.Region;
|
||
var Key = params.Key;
|
||
var CopySource = params.CopySource;
|
||
var UploadId = params.UploadId;
|
||
var PartNumber = params.PartNumber * 1;
|
||
var CopySourceRange = params.CopySourceRange;
|
||
|
||
var ChunkRetryTimes = this.options.ChunkRetryTimes + 1;
|
||
var self = this;
|
||
|
||
Async.retry(
|
||
ChunkRetryTimes,
|
||
function (tryCallback) {
|
||
self.uploadPartCopy(
|
||
{
|
||
TaskId: TaskId,
|
||
Bucket: Bucket,
|
||
Region: Region,
|
||
Key: Key,
|
||
CopySource: CopySource,
|
||
UploadId: UploadId,
|
||
PartNumber: PartNumber,
|
||
CopySourceRange: CopySourceRange,
|
||
},
|
||
function (err, data) {
|
||
tryCallback(err || null, data);
|
||
},
|
||
);
|
||
},
|
||
function (err, data) {
|
||
return callback(err, data);
|
||
},
|
||
);
|
||
}
|
||
|
||
// 分片下载文件
|
||
function downloadFile(params, callback) {
|
||
var self = this;
|
||
var TaskId = params.TaskId || util.uuid();
|
||
var Bucket = params.Bucket;
|
||
var Region = params.Region;
|
||
var Key = params.Key;
|
||
var FilePath = params.FilePath;
|
||
var FileSize;
|
||
var FinishSize = 0;
|
||
var onProgress;
|
||
var ChunkSize = params.ChunkSize || 1024 * 1024;
|
||
var ParallelLimit = params.ParallelLimit || 5;
|
||
var RetryTimes = params.RetryTimes || 3;
|
||
var ep = new EventProxy();
|
||
var PartList;
|
||
var aborted = false;
|
||
var head = {};
|
||
|
||
ep.on('error', function (err) {
|
||
callback(err);
|
||
});
|
||
|
||
ep.on('get_file_info', function () {
|
||
// 获取远端复制源文件的大小
|
||
self.headObject(
|
||
{
|
||
Bucket: Bucket,
|
||
Region: Region,
|
||
Key: Key,
|
||
},
|
||
function (err, data) {
|
||
if (err) return ep.emit('error', err);
|
||
|
||
// 获取文件大小
|
||
FileSize = params.FileSize = parseInt(data.headers['content-length']);
|
||
if (FileSize === undefined || !FileSize) {
|
||
callback(
|
||
util.error(
|
||
new Error(
|
||
'get Content-Length error, please add "Content-Length" to CORS ExposeHeader setting.（ 获取Content-Length失败，请在CORS ExposeHeader设置中添加Content-Length，请参考文档：https://cloud.tencent.com/document/product/436/13318 ）',
|
||
),
|
||
),
|
||
);
|
||
return;
|
||
}
|
||
|
||
// 归档文件不支持下载
|
||
const resHeaders = data.headers;
|
||
const storageClass = resHeaders['x-cos-storage-class'] || '';
|
||
const restoreStatus = resHeaders['x-cos-restore'] || '';
|
||
if (
|
||
['DEEP_ARCHIVE', 'ARCHIVE'].includes(storageClass) &&
|
||
(!restoreStatus || restoreStatus === 'ongoing-request="true"')
|
||
) {
|
||
// 自定义返回的错误码 与cos api无关
|
||
return callback({
|
||
statusCode: 403,
|
||
header: resHeaders,
|
||
code: 'CannotDownload',
|
||
message: 'Archive object can not download, please restore to Standard storage class.',
|
||
});
|
||
}
|
||
|
||
// 整理文件信息
|
||
head = {
|
||
ETag: data.ETag,
|
||
size: FileSize,
|
||
mtime: resHeaders['last-modified'],
|
||
crc64ecma: resHeaders['x-cos-hash-crc64ecma'],
|
||
};
|
||
|
||
// 处理进度反馈
|
||
onProgress = util.throttleOnProgress.call(self, FileSize, function (info) {
|
||
if (aborted) return;
|
||
params.onProgress(info);
|
||
});
|
||
|
||
if (FileSize <= ChunkSize) {
|
||
// 小文件直接单请求下载
|
||
self.getObject(
|
||
{
|
||
TaskId: TaskId,
|
||
Bucket: Bucket,
|
||
Region: Region,
|
||
Key: Key,
|
||
onProgress: onProgress,
|
||
Output: fs.createWriteStream(FilePath),
|
||
},
|
||
function (err, data) {
|
||
if (err) {
|
||
onProgress(null, true);
|
||
return callback(err);
|
||
}
|
||
onProgress({ loaded: FileSize, total: FileSize }, true);
|
||
callback(err, data);
|
||
},
|
||
);
|
||
} else {
|
||
// 大文件分片下载
|
||
ep.emit('calc_suitable_chunk_size');
|
||
}
|
||
},
|
||
);
|
||
});
|
||
|
||
// 计算合适的分片大小
|
||
ep.on('calc_suitable_chunk_size', function (SourceHeaders) {
|
||
// 控制分片大小
|
||
var SIZE = [1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 1024 * 2, 1024 * 4, 1024 * 5];
|
||
var AutoChunkSize = 1024 * 1024;
|
||
for (var i = 0; i < SIZE.length; i++) {
|
||
AutoChunkSize = SIZE[i] * 1024 * 1024;
|
||
if (FileSize / AutoChunkSize <= self.options.MaxPartNumber) break;
|
||
}
|
||
params.ChunkSize = ChunkSize = Math.max(ChunkSize, AutoChunkSize);
|
||
|
||
var ChunkCount = Math.ceil(FileSize / ChunkSize);
|
||
|
||
var list = [];
|
||
for (var partNumber = 1; partNumber <= ChunkCount; partNumber++) {
|
||
var start = (partNumber - 1) * ChunkSize;
|
||
var end = partNumber * ChunkSize < FileSize ? partNumber * ChunkSize - 1 : FileSize - 1;
|
||
var item = {
|
||
PartNumber: partNumber,
|
||
start: start,
|
||
end: end,
|
||
};
|
||
list.push(item);
|
||
}
|
||
PartList = list;
|
||
|
||
ep.emit('prepare_file');
|
||
});
|
||
|
||
// 准备要下载的空文件
|
||
ep.on('prepare_file', function (SourceHeaders) {
|
||
fs.writeFile(FilePath, '', (err) => {
|
||
if (err) {
|
||
ep.emit('error', err.code === 'EISDIR' ? { code: 'exist_same_dir', message: FilePath } : err);
|
||
} else {
|
||
ep.emit('start_download_chunks');
|
||
}
|
||
});
|
||
});
|
||
|
||
// 计算合适的分片大小
|
||
var result;
|
||
ep.on('start_download_chunks', function (SourceHeaders) {
|
||
onProgress({ loaded: 0, total: FileSize }, true);
|
||
var maxPartNumber = PartList.length;
|
||
Async.eachLimit(
|
||
PartList,
|
||
ParallelLimit,
|
||
function (part, nextChunk) {
|
||
if (aborted) return;
|
||
Async.retry(
|
||
RetryTimes,
|
||
function (tryCallback) {
|
||
if (aborted) return;
|
||
// FinishSize
|
||
var Headers = util.clone(params.Headers);
|
||
Headers.Range = 'bytes=' + part.start + '-' + part.end;
|
||
const writeStream = fs.createWriteStream(FilePath, {
|
||
start: part.start,
|
||
flags: 'r+',
|
||
});
|
||
var preAddSize = 0;
|
||
var chunkReadSize = part.end - part.start;
|
||
self.getObject(
|
||
{
|
||
TaskId: TaskId,
|
||
Bucket: params.Bucket,
|
||
Region: params.Region,
|
||
Key: params.Key,
|
||
Query: params.Query,
|
||
Headers: Headers,
|
||
onProgress: function (data) {
|
||
if (aborted) return;
|
||
FinishSize += data.loaded - preAddSize;
|
||
preAddSize = data.loaded;
|
||
onProgress({ loaded: FinishSize, total: FileSize });
|
||
},
|
||
Output: writeStream,
|
||
},
|
||
function (err, data) {
|
||
if (aborted) return;
|
||
|
||
// 处理错误和进度
|
||
if (err) {
|
||
FinishSize -= preAddSize;
|
||
return tryCallback(err);
|
||
}
|
||
|
||
// 处理返回值
|
||
if (part.PartNumber === maxPartNumber) result = data;
|
||
var chunkHeaders = data.headers || {};
|
||
|
||
var contentRanges = chunkHeaders['content-range'] || ''; // content-range 格式："bytes 3145728-4194303/68577051"
|
||
var totalSize = parseInt(contentRanges.split('/')[1] || 0);
|
||
|
||
// 只校验文件大小和 crc64 是否有变更
|
||
var changed;
|
||
if (chunkHeaders['x-cos-hash-crc64ecma'] !== head.crc64ecma)
|
||
changed = 'download error, x-cos-hash-crc64ecma has changed.';
|
||
else if (totalSize !== head.size) changed = 'download error, Last-Modified has changed.';
|
||
// else if (data.ETag !== head.ETag) error = 'download error, ETag has changed.';
|
||
// else if (chunkHeaders['last-modified'] !== head.mtime) error = 'download error, Last-Modified has changed.';
|
||
|
||
// 如果
|
||
if (changed) {
|
||
FinishSize -= preAddSize;
|
||
onProgress({ loaded: FinishSize, total: FileSize });
|
||
ep.emit('error', {
|
||
code: 'ObjectHasChanged',
|
||
message: changed,
|
||
statusCode: data.statusCode,
|
||
header: chunkHeaders,
|
||
});
|
||
self.emit('inner-kill-task', { TaskId: TaskId });
|
||
} else {
|
||
FinishSize += chunkReadSize - preAddSize;
|
||
part.loaded = true;
|
||
onProgress({ loaded: FinishSize, total: FileSize });
|
||
tryCallback(err, data);
|
||
}
|
||
},
|
||
);
|
||
},
|
||
function (err, data) {
|
||
if (aborted) return;
|
||
nextChunk(err, data);
|
||
},
|
||
);
|
||
},
|
||
function (err, data) {
|
||
if (aborted) return;
|
||
onProgress({ loaded: FileSize, total: FileSize }, true);
|
||
if (err) return ep.emit('error', err);
|
||
ep.emit('download_chunks_complete');
|
||
},
|
||
);
|
||
});
|
||
|
||
// 下载已完成
|
||
ep.on('download_chunks_complete', function () {
|
||
callback(null, result);
|
||
});
|
||
|
||
// 监听 取消任务
|
||
var killTask = function () {
|
||
aborted = true;
|
||
};
|
||
TaskId && self.on('inner-kill-task', killTask);
|
||
|
||
ep.emit('get_file_info');
|
||
}
|
||
|
||
var API_MAP = {
|
||
sliceUploadFile: sliceUploadFile,
|
||
abortUploadTask: abortUploadTask,
|
||
uploadFile: uploadFile,
|
||
uploadFiles: uploadFiles,
|
||
sliceCopyFile: sliceCopyFile,
|
||
downloadFile: downloadFile,
|
||
};
|
||
|
||
module.exports.init = function (COS, task) {
|
||
task.transferToTaskMethod(API_MAP, 'sliceUploadFile');
|
||
util.each(API_MAP, function (fn, apiName) {
|
||
COS.prototype[apiName] = util.apiWrapper(apiName, fn);
|
||
});
|
||
};
|