vue只用element-ui上传图片到七牛云
应约学生的需求 写一篇关于element-ui上传图片到七牛云的示例
https://element.eleme.cn/#/zh-CN/component/upload 这是上传图片的参考文档
目的：
是通过使用ElementUI的 upload组件上传图片到七牛云 储存对象上，之后难道该图片在七牛云上的url地址
1.参数说明
action
这个是七牛云的bucket域名
域名地址：https://developer.qiniu.com/kodo/manual/1671/region-endpoint
我们在这里按照自己七牛云服务器的位置填写，如在七牛云空间概览中我的存储区域为“华东”，那么翻越bucket域名文档，华东地区的客户端上传地址为http(s)://upload.qiniup.com，那这个参数应填为：
action="http://upload.qiniup.com"data
上传时附带的额外参数，我们在这里要填写我们的七牛云token，token格式为一个json对象：
{
token: "xxx:xxx:xxx" // 由":"分隔开为三部分的长字符串
}
七牛云Token生成算法说明：https://developer.qiniu.com/kodo/manual/1208/upload-token
七牛云Token在线生成演示：http://jsfiddle.net/gh/get/extjs/4.2/icattlecoder/jsfiddle/tree/master/uptoken
生成Token需要以下几个参数
- accessKey：在
七牛云-密钥管理中可查看 - secretKey：在
七牛云-密钥管理中可查看 - backetName：你的
存储空间列表中某一存储对象的名称 - deadLine：Token过期时间
- 总之拿到Token后我们便可以在
data参数下设置自己的token
*******************************************************************************/根据七牛云文档生成token算法
/**
* Created by guohongjun on 2018/4/18.
* 用户相关api
*/
import CryptoJS from 'crypto-js'
/* utf.js - UTF-8 <=> UTF-16 convertion
*
* Copyright (C) 1999 Masanao Izumo
* Version: 1.0
* LastModified: Dec 25 1999
* This library is free. You can redistribute it and/or modify it.
*/
/*
* Interfaces:
* utf8 = utf16to8(utf16);
* utf16 = utf8to16(utf8);
*/
function utf16to8(str) {
var out, i, len, c;
out = "";
len = str.length;
for (i = 0; i < len; i++) {
c = str.charCodeAt(i);
if ((c >= 0x0001) && (c <= 0x007F)) {
out += str.charAt(i);
} else if (c > 0x07FF) {
out += String.fromCharCode(0xE0 | ((c >> 12) & 0x0F));
out += String.fromCharCode(0x80 | ((c >> 6) & 0x3F));
out += String.fromCharCode(0x80 | ((c >> 0) & 0x3F));
} else {
out += String.fromCharCode(0xC0 | ((c >> 6) & 0x1F));
out += String.fromCharCode(0x80 | ((c >> 0) & 0x3F));
}
}
return out;
}
function utf8to16(str) {
var out, i, len, c;
var char2, char3;
out = "";
len = str.length;
i = 0;
while (i < len) {
c = str.charCodeAt(i++);
switch (c >> 4) {
case 0:
case 1:
case 2:
case 3:
case 4:
case 5:
case 6:
case 7:
// 0xxxxxxx
out += str.charAt(i - 1);
break;
case 12:
case 13:
// 110x xxxx 10xx xxxx
char2 = str.charCodeAt(i++);
out += String.fromCharCode(((c & 0x1F) << 6) | (char2 & 0x3F));
break;
case 14:
// 1110 xxxx 10xx xxxx 10xx xxxx
char2 = str.charCodeAt(i++);
char3 = str.charCodeAt(i++);
out += String.fromCharCode(((c & 0x0F) << 12) | ((char2 & 0x3F) << 6) | ((char3 & 0x3F) << 0));
break;
}
}
return out;
}
/*
* Interfaces:
* b64 = base64encode(data);
* data = base64decode(b64);
*/
var base64EncodeChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_";
var base64DecodeChars = new Array(-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,
52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1);
function base64encode(str) {
var out, i, len;
var c1, c2, c3;
len = str.length;
i = 0;
out = "";
while (i < len) {
c1 = str.charCodeAt(i++) & 0xff;
if (i == len) {
out += base64EncodeChars.charAt(c1 >> 2);
out += base64EncodeChars.charAt((c1 & 0x3) << 4);
out += "==";
break;
}
c2 = str.charCodeAt(i++);
if (i == len) {
out += base64EncodeChars.charAt(c1 >> 2);
out += base64EncodeChars.charAt(((c1 & 0x3) << 4) | ((c2 & 0xF0) >> 4));
out += base64EncodeChars.charAt((c2 & 0xF) << 2);
out += "=";
break;
}
c3 = str.charCodeAt(i++);
out += base64EncodeChars.charAt(c1 >> 2);
out += base64EncodeChars.charAt(((c1 & 0x3) << 4) | ((c2 & 0xF0) >> 4));
out += base64EncodeChars.charAt(((c2 & 0xF) << 2) | ((c3 & 0xC0) >> 6));
out += base64EncodeChars.charAt(c3 & 0x3F);
}
return out;
}
function base64decode(str) {
var c1, c2, c3, c4;
var i, len, out;
len = str.length;
i = 0;
out = "";
while (i < len) {
/* c1 */
do {
c1 = base64DecodeChars[str.charCodeAt(i++) & 0xff];
} while (i < len && c1 == -1);
if (c1 == -1) break;
/* c2 */
do {
c2 = base64DecodeChars[str.charCodeAt(i++) & 0xff];
} while (i < len && c2 == -1);
if (c2 == -1) break;
out += String.fromCharCode((c1 << 2) | ((c2 & 0x30) >> 4));
/* c3 */
do {
c3 = str.charCodeAt(i++) & 0xff;
if (c3 == 61) return out;
c3 = base64DecodeChars[c3];
} while (i < len && c3 == -1);
if (c3 == -1) break;
out += String.fromCharCode(((c2 & 0XF) << 4) | ((c3 & 0x3C) >> 2));
/* c4 */
do {
c4 = str.charCodeAt(i++) & 0xff;
if (c4 == 61) return out;
c4 = base64DecodeChars[c4];
} while (i < len && c4 == -1);
if (c4 == -1) break;
out += String.fromCharCode(((c3 & 0x03) << 6) | c4);
}
return out;
}
var safe64 = function(base64) {
base64 = base64.replace(/\+/g, "-");
base64 = base64.replace(/\//g, "_");
return base64;
};
var genUpToken = function(accessKey, secretKey, putPolicy) {
//SETP 2
var put_policy = JSON.stringify(putPolicy);
//SETP 3
var encoded = base64encode(utf16to8(put_policy));
//SETP 4
var hash = CryptoJS.HmacSHA1(encoded, secretKey);
var encoded_signed = hash.toString(CryptoJS.enc.Base64);
//SETP 5
var upload_token = accessKey + ":" + safe64(encoded_signed) + ":" + encoded;
return upload_token;
};
export {genUpToken} //.导出token on-success
上传图片成功后执行的钩子函数，参数为服务器返回的相应。
上传图片后，七牛云服务器会返回我们上传的图片在七牛云服务器上的经过HASH后的名字，我们在存储对象绑定的域名后，缀上这段HASH值，就是我们图片的url，如：
uploadSuccess(res) {
// 你七牛云绑定的域名+res.key, 可以在七牛云上看看你上传好图片的地址
this.imgUrl = "http://xxx.xxx" + res.key;
this.EncodedEntryURI = res.key;
}有什么不懂的 再问我