微信小程序里如何用阿里云上传视频，图片。。
纯手写，踩了半天多的坑干出来了。。。
网上也有对于阿里云如何在微信小程序里使用，但是很不全，包括阿里云文档的最佳实践里。
话不多说上代码了。
1 upvideo(){ 2 var aliOssParams = util.aliOssParams();//主要是获取上传阿里云的加密策略policy和签名signature;以及上传自己要上传到阿里云的地址,当然还有自己阿里云accessid。 3 //上传视频到阿里云 4 var that = this; 5 wx.chooseVideo({ 6 maxDuration: 10, 7 success: function (res) { 8 var tempFilePath = res.tempFilePath; 9 var stringFilePath = String(tempFilePath); 10 var indexType = stringFilePath.lastIndexOf('.'); 11 var type = stringFilePath.substring(indexType); 12 var alikey = 'video/'+new Date().getTime() + 13 Math.floor(Math.random() * 1000)+ type ;//随机1000内的数加上时间戳作为你存放在阿里云video目录下名字和类型。 14 wx.uploadFile({ 15 url:aliOssParams.host, 16 filePath: tempFilePath, 17 name: 'file', 18 formData: { 19 name: tempFilePath, 20 key: alikey,//这个是关键它是定义存放在阿里云那个目录下 21 policy:aliOssParams.policy,//上传阿里云的加密策略 22 OSSAccessKeyId: aliOssParams.aid,//自己阿里云的aid 23 success_action_status: "200", 24 signature: aliOssParams.signature,//上传阿里云的签名 25 }, 26 success: function (res) { 27 var videoUrl = aliOssParams.host+'/'+alikey;//这就是 28 刚上传阿里云后的存放的地址链接，通过它打开你刚上传视频。 29 that.videoUrl = videoUrl; 30 console.log('that',that,videoUrl); 31 wx.showToast({ 32 title: "上传成功", 33 icon: 'success', 34 duration: 1000 35 }) 36 }, 37 fail: function ({ errMsg }) { 38 wx.showToast({ 39 title: "上传失败", 40 duration: 1000 41 }) 42 }, 43 }) 44 } 45 }) 46
通过代码大家可以看到最关键的是啥，如何获取加密策略和签名了，当然了，阿里云最佳实践里有demo，但是crypto这个库已经废弃了，它demo给你带过来的crypto，你只能自己去提取了。
这里是我提为大家提取的crypto函数,直接copy用。
/*!
* 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
*/
var base64map = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
// Global Crypto object
const Crypto = {};
// Crypto utilities
Crypto.util = {
// Bit-wise rotate left
rotl: function (n, b) {
return (n << b) | (n >>> (32 - b));
},
// Bit-wise rotate right
rotr: function (n, b) {
return (n << (32 - b)) | (n >>> b);
},
// Swap big-endian to little-endian and vice versa
endian: function (n) {
// If number given, swap endian
if (n.constructor == Number) {
return util.rotl(n, 8) & 0x00FF00FF |
util.rotl(n, 24) & 0xFF00FF00;
}
// Else, assume array and swap all items
for (var i = 0; i < n.length; i++)
n[i] = util.endian(n[i]);
return n;
},
// Generate an array of any length of random bytes
randomBytes: function (n) {
for (var bytes = []; n > 0; n--)
bytes.push(Math.floor(Math.random() * 256));
return bytes;
},
// Convert a string to a byte array
stringToBytes: function (str) {
var bytes = [];
for (var i = 0; i < str.length; i++)
bytes.push(str.charCodeAt(i));
return bytes;
},
// Convert a byte array to a string
bytesToString: function (bytes) {
var str = [];
for (var i = 0; i < bytes.length; i++)
str.push(String.fromCharCode(bytes[i]));
return str.join("");
},
// Convert a string to big-endian 32-bit words
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;
},
// Convert a byte array to big-endian 32-bits 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;
},
// Convert big-endian 32-bit words to a byte array
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;
},
// Convert a byte array to a hex string
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("");
},
// Convert a hex string to a byte array
hexToBytes: function (hex) {
var bytes = [];
for (var c = 0; c < hex.length; c += 2)
bytes.push(parseInt(hex.substr(c, 2), 16));
return bytes;
},
// Convert a byte array to a base-64 string
bytesToBase64: function (bytes) {
// Use browser-native function if it exists
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;
}
}
// Encode overflow bits, if there are any
if (overflow != undefined && overflow != -1)
base64.push(base64map.charAt(overflow));
// Add padding
while (base64.length % 4 != 0) base64.push("=");
return base64.join("");
},
// Convert a base-64 string to a byte array
base64ToBytes: function (base64) {
// Use browser-native function if it exists
if (typeof atob == "function") return util.stringToBytes(atob(base64));
// Remove non-base-64 characters
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;
},
HMAC : function (hasher, message, key, options) {
// Allow arbitrary length keys
key = key.length > 16 * 4 ?
hasher(key, { asBytes: true }) :
Crypto.util.stringToBytes(key);
// XOR keys with pad constants
var okey = key,
ikey = key.slice(0);
for (var i = 0; i < 16 * 4; i++) {
okey[i] ^= 0x5C;
ikey[i] ^= 0x36;
}
var hmacbytes = hasher(Crypto.util.bytesToString(okey) +
hasher(Crypto.util.bytesToString(ikey) + message, { asString: true }),
{ asBytes: true });
return options && options.asBytes ? hmacbytes :
options && options.asString ? Crypto.util.bytesToString(hmacbytes) :
Crypto.util.bytesToHex(hmacbytes);
},
sha11:function(k) {
var u = Crypto.util.stringToWords(k),
v = k.length * 8,
o = [],
q = 1732584193,
p = -271733879,
h = -1732584194,
g = 271733878,
f = -1009589776;
u[v >> 5] |= 128 << (24 - v % 32);
u[((v + 64 >>> 9) << 4) + 15] = v;
for (var y = 0; y < u.length; y += 16) {
var D = q,
C = p,
B = h,
A = g,
z = f;
for (var x = 0; x < 80; x++) {
if (x < 16) {
o[x] = u[y + x]
} else {
var s = o[x - 3] ^ o[x - 8] ^ o[x - 14] ^ o[x - 16];
o[x] = (s << 1) | (s >>> 31)
}
var r = ((q << 5) | (q >>> 27)) + f + (o[x] >>> 0) + (x < 20 ? (p & h | ~p & g) + 1518500249 : x < 40 ? (p ^ h ^ g) + 1859775393 : x < 60 ? (p & h | p & g | h & g) - 1894007588 : (p ^ h ^ g) - 899497514);
f = g;
g = h;
h = (p << 30) | (p >>> 2);
p = q;
q = r
}
q += D;
p += C;
h += B;
g += A;
f += z
}
return [q, p, h, g, f]
},
SHA1 : function(e, c) {
var d = Crypto.util.wordsToBytes(Crypto.util.sha11(e));
return c && c.asBytes ? d: c && c.asString ? Crypto.util.bytesToString(d) : Crypto.util.bytesToHex(d)
}
};
// Crypto mode namespace
Crypto.mode = {};
export {Crypto}
有了上面的crypto工具函数了，就去看看具体如何生成签名与加密策略吧。。
import base64 from "base-64"
import {Crypto} from "./crypto.js"
const util = {
aliOssParams(){
var aid = "xxxxxxx";//你自己的阿里云的accessid
var aky="xxxxxxxxxx";//你自己的阿里云的accesskey
var host = "https://xxxxxxxxx.aliyuncs.com";//你自己的阿里云域名
var policyText = {
"expiration": "2022-01-01T12:00:00.000Z",//上传的文件失效日期自己定义
"conditions": [
["content-length-range", 0, 10485760000]//上传的内容大小，自己定义
]
};
var policy = base64.encode(JSON.stringify(policyText));//生成的加密策略
var bytes = Crypto.util.HMAC(Crypto.util.SHA1, policy, aky, { asBytes: true }) ;
var signature = Crypto.util.bytesToBase64(bytes);//生成的签名
return {
policy: policy,
signature:signature,
aid:aid,
host: host
}
}
}
export {util}
至于如何上传图片，大体如下，请保证以上都已经跑通了，base64记得你上面引到。。
多张图片的上传如此
upMyImg(){
var aliOssParams = util.aliOssParams();
var that = this;
wx.chooseImage({
count: 9, //最多可以选择的图片总数
// sizeType: ['compressed'], // 可以指定是原图还是压缩图，默认二者都有
sourceType: ['album', 'camera'], // 可以指定来源是相册还是相机，默认二者都有
success: function (res) {
// 返回选定照片的本地文件路径列表，tempFilePath可以作为img标签的src属性显示图片
var tempFilePaths = res.tempFilePaths;
//启动上传等待中...
wx.showToast({
title: '正在上传...',
icon: 'loading',
mask: true,
duration: 10000
})
var uploadImgCount = 0;
var tempFilePath;
var stringFilePath = '';
var alikey = '' ;
var type='';
for (var i = 0, h = tempFilePaths.length; i < h; i++) {
// stringFilePath= String(tempFilePaths[i]);
// type = stringFilePath.substring(stringFilePath.lastIndexOf('.'));
alikey = 'imagees/'+new Date().getTime() + Math.floor(Math.random() * 150)+ '.jpg';
that.srcs.push(tempFilePaths[i]);
that.setData({srcs: that.srcs});
wx.uploadFile({
url: aliOssParams.host,
filePath: tempFilePaths[i],//上传图片的路径
name: 'file',
formData: {
key: alikey,
name: tempFilePaths[i],
policy:aliOssParams.policy,
OSSAccessKeyId: aliOssParams.aid,
success_action_status: "200",
signature: aliOssParams.signature,
},
success: function (res) {
uploadImgCount++;
console.log('rrrs',res,tempFilePaths[i]);
// var data = JSON.parse(res.data);
//服务器返回格式: { "Catalog": "testFolder", "FileName": "1.jpg", "Url": "https://test.com/1.jpg" }
// console.log('rrr',data);
console.log('ddd222',res,aliOssParams.host,alikey);
// var productInfo = that.data.productInfo;
// if (productInfo.bannerInfo == null) {
// productInfo.bannerInfo = [];
// }
// productInfo.bannerInfo.push({
// "catalog": data.Catalog,
// "fileName": data.FileName,
// "url": data.Url
// });
// that.setData({
// productInfo: productInfo
// });
//如果是最后一张,则隐藏等待中
if (uploadImgCount == tempFilePaths.length) {
// that.srcs.push(tempFilePaths[i]);
console.log(that.srcs,3222);
wx.hideToast();
wx.showToast({
title: "上传成功",
icon: 'success',
duration: 1000
})
}
},
fail: function (res) {
wx.hideToast();
wx.showModal({
title: '错误提示',
content: '上传图片失败',
showCancel: false,
success: function (res) { }
})
}
});
}
}
})
// 上传图片完
}
都是自己亲测，亲坑。。。解决了你的问题，就随手一赞。。
