uniapp使用阿里云OSS直接上传文件
背景
由于服务器带宽优先，很多时候上传文件，尤其是视频文件，稍微大一点上传速度有很慢，加上一些安全方面的原因，我还是喜欢将文件直接上传到阿里云OSS上，但是在uniapp中配置上传相对有点繁琐，这里记录一下，也方便大家直接拷贝使用。
流程
1.阿里云后台获取相关key
这里用需要三个数据
分别是：
1.accessid：
2.accesskey:
3.Bucket域名：
前两个大家都知道，最后一个由于阿里云后台都写在一起，比较容易搞混，这里截图给大家参考下
2.小程序端配置js文件
小程序主要配置4个文件和一个调用文件：crypto.js，hmac.js，sha1.js，base64.js
这四个文件我把代码放在下面，大家也可以直接网上下载。
最后一个aliyun.js是配置和调用的。
由于我习惯了网站的文件管理习惯，所以都放在了"/static/js"文件夹下，文件夹也是新建的，大家可以根据自己的习惯去修改路劲，不过修改路径的话记得前面的几个文件中的调用也要修改下。想偷懒就按的路劲来也可以的。
3.前端调用
代码调用就直接抄我的吧
代码
crypto.js
var base64map = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
let Crypto = {};
var util = Crypto.util = {
rotl: function (n, b) {
return (n << b) | (n >>> (32 - b));
},
rotr: function (n, b) {
return (n << (32 - b)) | (n >>> b);
},
endian: function (n) {
if (n.constructor == Number) {
return util.rotl(n, 8) & 0x00FF00FF |
util.rotl(n, 24) & 0xFF00FF00;
}
for (var i = 0; i < n.length; i++)
n[i] = util.endian(n[i]);
return n;
},
randomBytes: function (n) {
for (var bytes = []; n > 0; n--)
bytes.push(Math.floor(Math.random() * 256));
return bytes;
},
stringToBytes: function (str) {
var bytes = [];
for (var i = 0; i < str.length; i++)
bytes.push(str.charCodeAt(i));
return bytes;
},
bytesToString: function (bytes) {
var str = [];
for (var i = 0; i < bytes.length; i++)
str.push(String.fromCharCode(bytes[i]));
return str.join("");
},
stringToWords: function (str) {
var words = [];
for (var c = 0, b = 0; c < str.length; c++, b += 8)
words[b >>> 5] |= str.charCodeAt(c) << (24 - b % 32);
return words;
},
bytesToWords: function (bytes) {
var words = [];
for (var i = 0, b = 0; i < bytes.length; i++, b += 8)
words[b >>> 5] |= bytes[i] << (24 - b % 32);
return words;
},
wordsToBytes: function (words) {
var bytes = [];
for (var b = 0; b < words.length * 32; b += 8)
bytes.push((words[b >>> 5] >>> (24 - b % 32)) & 0xFF);
return bytes;
},
bytesToHex: function (bytes) {
var hex = [];
for (var i = 0; i < bytes.length; i++) {
hex.push((bytes[i] >>> 4).toString(16));
hex.push((bytes[i] & 0xF).toString(16));
}
return hex.join("");
},
hexToBytes: function (hex) {
var bytes = [];
for (var c = 0; c < hex.length; c += 2)
bytes.push(parseInt(hex.substr(c, 2), 16));
return bytes;
},
bytesToBase64: function (bytes) {
if (typeof btoa == "function") return btoa(util.bytesToString(bytes));
var base64 = [],
overflow;
for (var i = 0; i < bytes.length; i++) {
switch (i % 3) {
case 0:
base64.push(base64map.charAt(bytes[i] >>> 2));
overflow = (bytes[i] & 0x3) << 4;
break;
case 1:
base64.push(base64map.charAt(overflow | (bytes[i] >>> 4)));
overflow = (bytes[i] & 0xF) << 2;
break;
case 2:
base64.push(base64map.charAt(overflow | (bytes[i] >>> 6)));
base64.push(base64map.charAt(bytes[i] & 0x3F));
overflow = -1;
}
}
if (overflow != undefined && overflow != -1)
base64.push(base64map.charAt(overflow));
while (base64.length % 4 != 0) base64.push("=");
return base64.join("");
},
base64ToBytes: function (base64) {
if (typeof atob == "function") return util.stringToBytes(atob(base64));
base64 = base64.replace(/[^A-Z0-9+\/]/ig, "");
var bytes = [];
for (var i = 0; i < base64.length; i++) {
switch (i % 4) {
case 1:
bytes.push((base64map.indexOf(base64.charAt(i - 1)) << 2) |
(base64map.indexOf(base64.charAt(i)) >>> 4));
break;
case 2:
bytes.push(((base64map.indexOf(base64.charAt(i - 1)) & 0xF) << 4) |
(base64map.indexOf(base64.charAt(i)) >>> 2));
break;
case 3:
bytes.push(((base64map.indexOf(base64.charAt(i - 1)) & 0x3) << 6) |
(base64map.indexOf(base64.charAt(i))));
break;
}
}
return bytes;
}
};
Crypto.mode = {};
export default Crypto;
hmac.js
import Crypto from '@/static/js/crypto.js';
/*!
* Crypto-JS v1.1.0
* http://code.google.com/p/crypto-js/
* Copyright (c) 2009, Jeff Mott. All rights reserved.
* http://code.google.com/p/crypto-js/wiki/License
*/
(function(){
// Shortcut
var util = Crypto.util;
Crypto.HMAC = function (hasher, message, key, options) {
// Allow arbitrary length keys
key = key.length > hasher._blocksize * 4 ?
hasher(key, { asBytes: true }) :
util.stringToBytes(key);
// XOR keys with pad constants
var okey = key,
ikey = key.slice(0);
for (var i = 0; i < hasher._blocksize * 4; i++) {
okey[i] ^= 0x5C;
ikey[i] ^= 0x36;
}
var hmacbytes = hasher(util.bytesToString(okey) +
hasher(util.bytesToString(ikey) + message, { asString: true }),
{ asBytes: true });
return options && options.asBytes ? hmacbytes :
options && options.asString ? util.bytesToString(hmacbytes) :
util.bytesToHex(hmacbytes);
};
})();
sha1.js
import Crypto from '@/static/js/crypto.js';
/*!
* Crypto-JS v1.1.0
* http://code.google.com/p/crypto-js/
* Copyright (c) 2009, Jeff Mott. All rights reserved.
* http://code.google.com/p/crypto-js/wiki/License
*/
(function(){
// Shortcut
var util = Crypto.util;
// Public API
var SHA1 = Crypto.SHA1 = function (message, options) {
var digestbytes = util.wordsToBytes(SHA1._sha1(message));
return options && options.asBytes ? digestbytes :
options && options.asString ? util.bytesToString(digestbytes) :
util.bytesToHex(digestbytes);
};
// The core
SHA1._sha1 = function (message) {
var m = util.stringToWords(message),
l = message.length * 8,
w = [],
H0 = 1732584193,
H1 = -271733879,
H2 = -1732584194,
H3 = 271733878,
H4 = -1009589776;
// Padding
m[l >> 5] |= 0x80 << (24 - l % 32);
m[((l + 64 >>> 9) << 4) + 15] = l;
for (var i = 0; i < m.length; i += 16) {
var a = H0,
b = H1,
c = H2,
d = H3,
e = H4;
for (var j = 0; j < 80; j++) {
if (j < 16) w[j] = m[i + j];
else {
var n = w[j-3] ^ w[j-8] ^ w[j-14] ^ w[j-16];
w[j] = (n << 1) | (n >>> 31);
}
var t = ((H0 << 5) | (H0 >>> 27)) + H4 + (w[j] >>> 0) + (
j < 20 ? (H1 & H2 | ~H1 & H3) + 1518500249 :
j < 40 ? (H1 ^ H2 ^ H3) + 1859775393 :
j < 60 ? (H1 & H2 | H1 & H3 | H2 & H3) - 1894007588 :
(H1 ^ H2 ^ H3) - 899497514);
H4 = H3;
H3 = H2;
H2 = (H1 << 30) | (H1 >>> 2);
H1 = H0;
H0 = t;
}
H0 += a;
H1 += b;
H2 += c;
H3 += d;
H4 += e;
}
return [H0, H1, H2, H3, H4];
};
// Package private blocksize
SHA1._blocksize = 16;
})();
base64.js
export const Base64 = {
// private property
_keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
// public method for encoding
encode : function (input) {
var output = "";
var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
var i = 0;
input = Base64._utf8_encode(input);
while (i < input.length) {
chr1 = input.charCodeAt(i++);
chr2 = input.charCodeAt(i++);
chr3 = input.charCodeAt(i++);
enc1 = chr1 >> 2;
enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
enc4 = chr3 & 63;
if (isNaN(chr2)) {
enc3 = enc4 = 64;
} else if (isNaN(chr3)) {
enc4 = 64;
}
output = output +
this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2) +
this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4);
}
return output;
},
// public method for decoding
decode : function (input) {
var output = "";
var chr1, chr2, chr3;
var enc1, enc2, enc3, enc4;
var i = 0;
input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
while (i < input.length) {
enc1 = this._keyStr.indexOf(input.charAt(i++));
enc2 = this._keyStr.indexOf(input.charAt(i++));
enc3 = this._keyStr.indexOf(input.charAt(i++));
enc4 = this._keyStr.indexOf(input.charAt(i++));
chr1 = (enc1 << 2) | (enc2 >> 4);
chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
chr3 = ((enc3 & 3) << 6) | enc4;
output = output + String.fromCharCode(chr1);
if (enc3 != 64) {
output = output + String.fromCharCode(chr2);
}
if (enc4 != 64) {
output = output + String.fromCharCode(chr3);
}
}
output = Base64._utf8_decode(output);
return output;
},
// private method for UTF-8 encoding
_utf8_encode : function (string) {
string = string.replace(/\r\n/g,"\n");
var utftext = "";
for (var n = 0; n < string.length; n++) {
var c = string.charCodeAt(n);
if (c < 128) {
utftext += String.fromCharCode(c);
}
else if((c > 127) && (c < 2048)) {
utftext += String.fromCharCode((c >> 6) | 192);
utftext += String.fromCharCode((c & 63) | 128);
}
else {
utftext += String.fromCharCode((c >> 12) | 224);
utftext += String.fromCharCode(((c >> 6) & 63) | 128);
utftext += String.fromCharCode((c & 63) | 128);
}
}
return utftext;
},
// private method for UTF-8 decoding
_utf8_decode : function (utftext) {
var string = "";
var i = 0;
var c = c1 = c2 = 0;
while ( i < utftext.length ) {
c = utftext.charCodeAt(i);
if (c < 128) {
string += String.fromCharCode(c);
i++;
}
else if((c > 191) && (c < 224)) {
c2 = utftext.charCodeAt(i+1);
string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
i += 2;
}
else {
c2 = utftext.charCodeAt(i+1);
c3 = utftext.charCodeAt(i+2);
string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
i += 3;
}
}
return string;
}
}
aliyun.js
import Crypto from '@/static/js/crypto.js';
import '@/static/js/hmac.js';
import '@/static/js/sha1.js';
import {Base64} from '@/static/js/base64.js';
let date=new Date()
date=date.setHours(date.getHours() + 1)
let extime=""+new Date(date).toISOString()
var policyText = {
"expiration": extime, //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
"conditions": [
["content-length-range", 0, 1024*1024*100] // 设置上传文件的大小限制
]
};
var config={
accessid:'LTAI**********************',
accesskey:'wSs****************************Yq2f',
osshost:'https://*******.oss-cn-shanghai.aliyuncs.com',
policyBase64:Base64.encode(JSON.stringify(policyText))
}
var message = policyBase64;
var bytes = Crypto.HMAC(Crypto.SHA1, message, accesskey, { asBytes: true }) ;
var signature = Crypto.util.bytesToBase64(bytes);
var timetamp = new Date().getTime();
function random_string(len) {
len = len || 32;
var chars = 'ABCDEFGHJKMNPQRSTWXYZabcdefhijkmnprstwxyz2345678';
var maxPos = chars.length;
var pwd = '';
for (let i = 0; i < len; i++) {
pwd += chars.charAt(Math.floor(Math.random() * maxPos));
}
return pwd;
}
var OSS={
name:'aliyun',
host:config.osshost,
accessid:config.accessid,
signature:signature,
policyBase64:policyBase64,
}
export default OSS;
前端调用
dom
<view class="btn" @click="selectVideo">选择视频</view>
js引入文件
import OSS from '@/static/js/aliyun.js';
methods
selectVideo(){
let that=this
uni.chooseVideo({ //打开选择视频
sourceType: ['album'], //直接打开选择视频 ['album','camera'] 就会弹出选框
success: function (res) {
that.video = res.tempFilePath; //res.tempFilePath里面就是你选择到的视频
console.log(that.video)
if(res.size > OSS.uploadFileSize){ //OSS.uploadFileSize在aliyun.js里面设置，
uni.showToast({
title: '文件大小超过系统上传限制：' + OSS.uploadFileSize,
icon: 'none',
duration: 1000
});
return;
}
var date=new Date;var year=date.getFullYear(); var month=date.getMonth()+1;
let filePath='test/'+year+"-"+month+"/"+Date.parse(new Date())+parseInt(Math.random()*(100000-10000+1)+10000,10)+".mp4" //路径自己修改
that.fileUpload('video', that.video, filePath);
that.info.video=OSS.host+"/"+filePath
}
});
},
fileUpload(type, path, stroeAs){
console.log('开始上传')
let self = this;
return new Promise((resolve, reject) => {
uni.uploadFile({
url: OSS.host,
filePath: path,
name: 'file',
formData:{'key': stroeAs,'policy': OSS.policyBase64,'OSSAccessKeyId': OSS.accessid, 'success_action_status': '200','signature': OSS.signature,},
success: (res) => {
console.log(res)
uni.showToast({
title: '上传成功',
icon: 'success',
duration: 1000
});
console.log(OSS.host +'/'+ stroeAs)
resolve('suc');
},
fail: (err) => {
console.log('upload fail', err);
uni.showModal({
content: err.errMsg,
showCancel: false
});
reject('err')
}
});
})
},