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93 lines
2.6 KiB
93 lines
2.6 KiB
2 months ago
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// base64,Hmac,Sha1,Crypto 相关算法
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import config from './config.js';
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import base64 from './base64.js';
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import Hmac from './hmac.js';
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import Sha1 from './sha1.js';
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import Crypto from './crypto.js';
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/**
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* 上传文件到阿里云oss
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* @param {string} filePath 图片的本地资源路径
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* @param {string} dir 表示要传到哪个目录下
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* @return 完整的图片地址
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*/
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const uploadFile = function(filePath, dir) {
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return new Promise((resolve, reject) => {
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if (!filePath || filePath.length < 9) {
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uni.showModal({
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title: '图片错误',
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content: '请重试',
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showCancel: false,
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})
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reject('图片错误');
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}
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// #ifdef H5
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// 图片名字 可以自行定义
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let aliyunFileKey = dir + '.png';
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// #endif
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// #ifndef H5
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// 获取上传的文件类型
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let fileTypeIndex = filePath.lastIndexOf('.');
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let fileType = filePath.substring(fileTypeIndex);
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let aliyunFileKey = dir + fileType;
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// #endif
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const aliyunServerURL = config.uploadImageUrl; // OSS地址，需要https
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const accessid = config.OSSAccessKeyId;
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const policyBase64 = getPolicyBase64();
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const signature = getSignature(policyBase64); // 获取签名
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uni.uploadFile({
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url: aliyunServerURL, // 开发者服务器url
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filePath: filePath, // 要上传文件资源的路径
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name: 'file', // 必须填file
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formData: {
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'key': aliyunFileKey,
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'policy': policyBase64,
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'OSSAccessKeyId': accessid,
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'success_action_status': '200', // 让服务端返回200, 不然默认会返回204
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'signature': signature,
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},
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success: function(res) {
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if (res.statusCode != 200) {
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reject(new Error('上传错误:' + JSON.stringify(res)));
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}
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resolve(aliyunServerURL + aliyunFileKey);
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},
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fail: function(err) {
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err.domainName = aliyunServerURL;
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reject(err);
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},
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})
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});
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}
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const getPolicyBase64 = function() {
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let date = new Date();
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date.setHours(date.getHours() + config.timeout);
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let srcT = date.toISOString();
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const policyText = {
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"expiration": '2099-01-01T12:00:00.000Z', //设置该Policy的失效时间，超过这个失效时间之后，就没有办法通过这个policy上传文件了
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"conditions": [
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["content-length-range", 0, 5242880] // 设置上传文件的大小限制(5m)
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]
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};
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const policyBase64 = base64.encode(JSON.stringify(policyText));
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return policyBase64;
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}
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// 生成签名
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const getSignature = function(policyBase64) {
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const accesskey = config.AccessKeySecret;
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const bytes = Crypto.HMAC(Crypto.SHA1, policyBase64, accesskey, {
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asBytes: true
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});
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const signature = Crypto.util.bytesToBase64(bytes);
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return signature;
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}
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module.exports = uploadFile;
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