125 lines
3.8 KiB
JavaScript
125 lines
3.8 KiB
JavaScript
"use strict";
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const Service = require("egg").Service;
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const OSS = require('ali-oss');
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const http = require('http');
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function fileToBlob(file) {
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// 创建 FileReader 对象
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let reader = new FileReader();
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return new Promise(resolve => {
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// FileReader 添加 load 事件
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reader.addEventListener('load', (e) => {
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let blob;
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if (typeof e.target.result === 'object') {
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blob = new Blob([e.target.result])
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} else {
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blob = e.target.result
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}
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resolve(blob)
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})
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// FileReader 以 ArrayBuffer 格式 读取 File 对象中数据
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reader.readAsArrayBuffer(file)
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})
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}
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class ImageService extends Service {
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/**
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* 保存图片
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* @param {*} showPath 图片展示路径
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* @param {*} dicomInfo dicom信息
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* @param {*} user_id user_id
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*/
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async downloadImage(path, osPath, config) {
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try {
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let client = await this.getClient()
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if (client) {
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const result = await client.get(path, osPath);
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return result
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}
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return false
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// const client = new OSS({
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// region: config.region,
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// accessKeyId: config.accessKeyId,
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// accessKeySecret: config.accessKeySecret,
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// bucket: config.bucket
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// });
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} catch (e) {
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console.log(e)
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}
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}
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dcmUpload(name, file, config) {
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// const client = new OSS({
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// region: config.region,
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// accessKeyId: config.accessKeyId,
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// accessKeySecret: config.accessKeySecret,
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// bucket: config.bucket
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// });
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return new Promise(async resolve => {
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let client = await this.getClient()
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try {
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let res = await client.put(name, file)
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resolve({
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...res,
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})
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} catch (e) {
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resolve(false)
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console.log(e)
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}
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})
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}
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async getClient() {
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if (this.ctx.state.ossConfig && this.isCredentialsExpired(this.ctx.state.ossConfig.expiration)) return new OSS(this.ctx.state.ossConfig)
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let config = null
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let res = await this.getOssConfig()
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if (res && res.IsSuccess) {
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config = res.Result[res.Result.ObjectStoreUse]
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config.bucket = config.bucketName
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config.basePath = config.viewEndpoint;
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config.stsToken = config.securityToken
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config.timeout = 10 * 60 * 1000
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this.ctx.state.config = config
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return new OSS(config)
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}
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return false
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}
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getOssConfig() {
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return new Promise((res, rej) => {
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const Authorization = this.ctx.get('Authorization');
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let options = {
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hostname: '106.14.89.110',
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port: 30000,
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path: "/user/GetObjectStoreToken",
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method: "GET",
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headers: {
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Authorization: Authorization
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}
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}
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const req = http.request(options, r => {
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let data = '';
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r.on('data', chunk => {
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data += chunk
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})
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r.on('end', () => {
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res(JSON.parse(data))
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})
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})
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req.end()
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})
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}
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isCredentialsExpired(credentials) {
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if (!credentials) {
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return true;
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}
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const expireDate = new Date(credentials);
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const now = new Date();
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// 如果有效期不足五分钟，视为过期。
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return expireDate.getTime() - now.getTime() <= 300000;
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}
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}
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module.exports = ImageService;
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