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import { HttpClient } from '@angular/common/http'; |
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import { Injectable } from '@angular/core'; |
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import { Observable } from 'rxjs'; |
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@Injectable({ |
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providedIn: 'root' |
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}) |
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export class ObjectsService { |
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static readonly c_apiRoot = "/api/";//普通上传的API根路径
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static readonly c_apiRoot_Multipart = "/api/";//分块上传的API根路径
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// static testPath = "f1/f2";//测试路径
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constructor(private http: HttpClient) { } |
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//普通上传，单个文件上限5M
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static baseUrl = ObjectsService.c_apiRoot + 'Objects/WebPlan/'; |
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postFile(extensionPath: string, file: File): Observable<Object> { |
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let formData = new FormData() |
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//console.log(file.name + file.type);
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formData.append("file", file, file.name) |
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let data = { keepOriginalName: 'true' } |
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return this.http.post(ObjectsService.baseUrl + extensionPath, formData, { params: data }); |
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} |
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//分块上传
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static baseUrl_MultipartUpload = ObjectsService.c_apiRoot_Multipart + 'NewMultipartUpload/WebPlan/'; |
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// {
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// "objectName": "string",
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// "uploadId": "string"
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// }
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postFile_MultipartUpload(extensionPath: string, file: File): Promise<Object> { |
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// let formData = new FormData()
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// formData.append("file", file, file.name)
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// return this.http.post(ObjectsService.baseUrl + extensionPath, formData);
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let data = { keepOriginalName: 'true', filename: file.name } |
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return new Promise((resolve, reject) => { |
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this.http.post(ObjectsService.baseUrl_MultipartUpload + extensionPath, {}, { params: data }).subscribe(async (data: any) => { //初始化分段上传
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let objectName = data.objectName |
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let uploadId = data.uploadId |
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let PartNumberETag = []; //每次返回需要保存的信息
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//分块 处理
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let fileSize = file.size || null //上传文件的总大小
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let shardSize = 5 * 1024 * 1024 //5MB一个分片
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let allSlice = Math.ceil(fileSize / shardSize) //总文件/5MB===共分多少段
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for (let i = 0; i < allSlice; i++) { //循环分段上传
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let start = i * shardSize //切割文件开始位置
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let end = Math.min(fileSize, start + shardSize); //切割文件结束位置
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let formData = new FormData() |
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formData.append("file", file.slice(start, end)) |
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//同步写法实现异步调用
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let result = await new Promise((resolve, reject) => { |
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// await 需要后面返回一个 promise 对象
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this.http.post(ObjectsService.c_apiRoot_Multipart + `MultipartUpload/WebPlan/${objectName}?uploadId=${uploadId}&partNumber=${i + 1}`, formData).subscribe((data: any) => { |
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let msg = { "partNumber": data.partNumber || null, "eTag": data.eTag || null } |
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resolve(msg) // 调用 promise 内置方法处理成功
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}) |
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}); |
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PartNumberETag.push(result) |
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if (PartNumberETag.length === allSlice) { //分块上传完成
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let data = PartNumberETag |
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let paramsData = { uploadId: uploadId }; |
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let path = ObjectsService.c_apiRoot_Multipart + 'CompleteMultipartUpload/WebPlan/' + objectName; |
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this.http.post(path, data, { params: paramsData }).subscribe(data => { |
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let objData: any = new Object(); |
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objData.fileName = file.name; |
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objData.filePath = (ObjectsService.baseUrl + objectName).replace(file.name, ""); |
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resolve(objData) |
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}) |
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} |
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}//for循环
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//分块 处理
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}) |
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}) |
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} |
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} |
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