uni-app 阿里云oss直传采坑记录

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阿里云 oss 官方 javascript 直传案例 https://help.aliyun.com/docum…

前提
一般开发需求上传文件用到的最多就是上传视频和图片了 uni-app 上传视频接口 uni.chooseVideo() 和上传图片接口 uni.chooseImage() 在成功的回调 success 里面返回的参数里面 tempFilePath，tempFilePaths 都表示文件的临时路径，只不过一个是字符串，一个是数组
开发
开发的时候，调试都是在 chrome 中完成的，在选择文件成功之后打印出的参数里面有文件的临时路径（浏览器中是 blob 地址）和文件大小返回的参数没有文件类型和文件名，然而我需要随机生成文件名，这该咋办？于是我搜到一个方法用 uni.request() 读取 blob url 地址，在成功返回的参数可以得到 content-type，比如 jpg 图片 image/jpeg，之后用 MIME 来对比找到文件扩展名就行了使用 uni.uploadFile() 上传文件的时候 formData 参数里面 key 就传需要保存的文件路径 + 生成的随机字符串 + 文件扩展名 ps: 如果你要使用原文件名 key 的值就是 ‘${filename}’, 当然前面可以加文件路径 ’path/’+’${filename}’。不过你上传以后会发现 oss 返回的 Response 并没有文件地址，而是什么都没有！
天真的以为这样上传就没问题了，后来打包安卓 app 在上传文件的时候失败了，排查原因发现是在生成随机文件名时出现问题了
问题
原因就在上传视频接口 uni.chooseVideo() 和上传图片接口 uni.chooseImage() 返回的临时地址在各个平台表现并不一样，官方文档并没有说明，我在官方论坛提问建议了说下以下几 3 个平台：1. 在 h5 端返回 blob 地址 e.g. blob:http://127.0.0.1:8080/9fb99ee3-b533-47a0-9917-04804731fb582. 在 app 端（测试 android，ios 没测试，应该和 Android 一样的）返回文件存储地址 e.g. file:///storage/emulated/0/DCIM/image1.jpg3. 微信小程序返回地址时服务器临时图片地址 e.g. http://tmp/wx1679d8dc40692733.o6zAJs4Evck8rMa6KlPZ4dGYI0Ps.t3jkFi3eZEG4475ab2f73a8289586958242bff38a925.jpg 微信里面上传到时 oss 失败，提示 fail url not in domain list 应该要配置上传地址域名白名单吧
随便一提我是用 uni.showModal 调试的，在 app 里面还是蛮管用的
uni.showModal({
title: ‘ 选择文件提示 ’,
content: JSON.stringify(res),
success: function (ret) {
if (ret.confirm) {
console.log(‘ 用户点击确定 ’);
} else if (ret.cancel) {
console.log(‘ 用户点击取消 ’);
}
}
});
代码
下面是视频上传的代码，签名加密部分的 js 直接拷贝官方案列里面的，之后稍有修改，因为是 import 引入
<view class=”uni-flex uni-row form-im” v-show=”pickerIndex === 1″>
<view class=”flex-item uni-label label-ex label-start”> 视频：</view>
<view class=”flex-item ipt-wrap”>
<view class=”uni-uploader__files”>
<view class=”uni-uploader__input-box”>
<view class=”uni-uploader__input” @tap=”chooseVideo”></view>
<video class=”video-prev” v-if=”showVideo” :src=”videoSrc”></video>
</view>
</view>
</view>
</view>
crypto.js , hmac.js, sha1.js, base64.js 这几个引入的 js 都有修改，修改后的代码也会放在下面其实就是添加了 export 和 import
<script>
import Crypto from ‘@/common/utils/crypto1/crypto/crypto.js’;
import ‘@/common/utils/crypto1/hmac/hmac.js’;
import ‘@/common/utils/crypto1/sha1/sha1.js’;
import {Base64} from ‘@/common/utils/base64.js’;
// oss 配置
var uploadFileSize = 1024*1024*100; // 上传文件的大小限制 100m
var policyText = {
“expiration”: “2022-01-01T12:00:00.000Z”, // 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
“conditions”: [
[“content-length-range”, 0, uploadFileSize] // 设置上传文件的大小限制
]
};
var accessid = ‘*******’;
var accesskey = ‘*******’;
var osshost = ‘https://xxx.oss-cn-hangzhou.aliyuncs.com’;
var 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();

}
}
</script>
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(){

var base64map = “ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/”;

// Global Crypto object
// window.Crypto = {};
let Crypto = {};

// Crypto utilities
var util = 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;

}

};

// Crypto mode namespace
Crypto.mode = {};

// })();

export default Crypto;
hmac.js
import Crypto from ‘@/common/utils/crypto1/crypto/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 ‘@/common/utils/crypto1/crypto/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;
}

}

uni-app 阿里云oss直传 采坑记录

Just My Socks（注册教程 内含优惠码）

uni-app 阿里云oss直传采坑记录

Just My Socks（注册教程内含优惠码）