uniapp上传本地图片至oss

1、在根目录中创建 utils 文件夹，并且在 utils 下继续创建 oss 文件夹

2、在 oss 文件夹中创建以下文件

1、base64.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;

2、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;

3、hmac.js

import Crypto from './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);

};

})();

4、oss.js

import Crypto from './crypto.js';
import './hmac.js';
import './sha1.js';
import {
	Base64
} from './base64.js';
import deploy from "../../../config/config.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: '你的OSS ID',
	accesskey: '你的OSS KEY',
	osshost: '你的OSS 访问域名',
	policyBase64: Base64.encode(JSON.stringify(policyText))
}
var message = config.policyBase64;
var bytes = Crypto.HMAC(Crypto.SHA1, message, config.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: message,
}


export const fileUpload = (path, stroeAs) => {
	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) => {
				resolve(OSS.host + '/' + stroeAs);
			},
			fail: (err) => {
				reject(err)
			}
		});

	})
}

5、sha1.js

import Crypto from './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;

})();

3、修改 oss.js 文件的 oss 配置信息

var config = {
	accessid: '你的OSS ID',
	accesskey: '你的OSS KEY',
	osshost: '你的OSS 访问域名',
	policyBase64: Base64.encode(JSON.stringify(policyText))
}

4、调用方式

在需要使用oss的文件中使用es6语法导入oss中暴露的fileUpload方法
import { fileUpload } from '@/utils/oss/oss.js';

	//打开相册选择图片
	const upload = () => {
		uni.chooseImage({
			count: 1,
			sizeType: ['original', 'compressed'],
			sourceType: ['album'],
			success: function(res) {
				var date = new Date(); // 获取时间
				var year = date.getFullYear(); // 获取年
				var month = date.getMonth() + 1; // 获取月
				var strDate = date.getDate(); // 获取日
				let path = `${year}/${month}/${strDate}/${new Date().getTime()}.${data.headSculpture.split('.')[1]}`;
				fileUpload(res.tempFilePaths[0], path).then(res => {
          res为oss上传成功的回调地址
					uni.showToast({
						title: '上传成功'
					})
				}).catch(err => {
					uni.showToast({
						title: '上传失败请稍后重试',
						icon: 'error'
					})
				})
			}
		});
	}