阿里云 oss JavaScript客户端签名文件上传 vue2.0

1. 官方文档地址
   

   https://help.aliyun.com/document_detail/31925.html?spm=5176.doc31923.6.631.SAJk7p

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2. 官方文档内给的demo是传统的代码引入方式，用到的模块有crypto、hmac、sha1、base64、plupload。这些模块都是定制化的，用npm安装指定的模块会出现相应的方法找不到未定义情况，所以想在vue2.0项目中使用oss上传，需要自己定义一个crypto方法，把hmac、sha1方法放到crypto对象中，base64方法是独立的，直接把demo中的文件放入项目中,用export default dao's'h
   

   var base64map = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'var Crypto = {}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 = []    var 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.HMAC = function (hasher, message, key, options) {  key = key.length > hasher._blocksize * 4 ? hasher(key, { asBytes: true }) : util.stringToBytes(key)  // XOR keys with pad constants  var okey = key  var 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)}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)}SHA1._sha1 = function (message) {  var m = util.stringToWords(message)  var l = message.length * 8  var w = []  var H0 = 1732584193  var H1 = -271733879  var H2 = -1732584194  var H3 = 271733878  var 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    var b = H1    var c = H2    var d = H3    var 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 blocksizeSHA1._blocksize = 16export default Crypto
   

   以上是crypto方法，这里需要注意的是，如果vue项目中用到了代码校验，这里的代码会有语法报错，仔细改掉就可以了
3. plupload模块直接用npm安装就好了，相应文档地址http://www.phpin.net/tools/plupload/
   
4. 接下来就可以按照官方demo 进行相应的修改，配置自己的参数，进行上传测试
   阅读原文

   http://click.aliyun.com/m/35106/