阿里云OSS前端直传（STS临时授权访问）
后端sts支持使用的是php语言，这种方法算是比较安全（个人认为最安全的是前端先上传到后端服务器，再由服务器上传至阿里云OSS，不过这样比较费带宽费时间；或者使用服务端签名直传并设置上传回调）。项目完整源码在文章末尾附有下载地址。
官方说明文档地址：https://help.aliyun.com/document_detail/100624.html?spm=5176.13910061.sslink.10.c9f92bd9AcqfE5
文件夹及文件分布情况：
uoload.js 注意host的值必须与config.json里面的配置保持一致
accessid= '';//值从sts服务器获取即可
accesskey= '';
//host = 'http://post-test.oss-cn-hangzhou.aliyuncs.com';
host='http://public-files.oss-cn-beijing.aliyuncs.com';// 必须与sts 服务器的配置信息一致
//id与key 直接暴露，不建议使用
token = '';
expire = 0
g_dirname = ''
g_object_name = ''
g_object_name_type = ''
//now = timestamp = Date.parse(new Date()) / 1000;
var policyText = {
"expiration": "1990-01-01T12:00:00.000Z", //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--->后期以sts返回的为准
"conditions": [
["content-length-range", 0, 1048576000] // 设置上传文件的大小限制
]
};
var policyBase64 ='';// Base64.encode(JSON.stringify(policyText))
message = policyBase64
var bytes ='';// Crypto.HMAC(Crypto.SHA1, message, accesskey, { asBytes: true }) ;
var signature = '';//Crypto.util.bytesToBase64(bytes);
function send_request()//获取id 签名等信息
{
var xmlhttp = null;
if (window.XMLHttpRequest)
{
xmlhttp=new XMLHttpRequest();
}
else if (window.ActiveXObject)
{
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
if (xmlhttp!=null)
{
// serverUrl是 用户获取 '签名和Policy' 等信息的应用服务器的URL，请将下面的IP和Port配置为您自己的真实信息。
// serverUrl = 'http://88.88.88.88:8888/aliyun-oss-appserver-php/php/get.php'
//serverUrl = './php/get.php'
serverUrl = '../sts-server/sts.php'
xmlhttp.open( "GET", serverUrl, false );
xmlhttp.send( null );
return xmlhttp.responseText
}
else
{
alert("Your browser does not support XMLHTTP.");
}
};
//get_signature()
function get_signature()
{
// 可以判断当前expire是否超过了当前时间， 如果超过了当前时间， 就重新取一下，3s 作为缓冲。
now = timestamp = Date.parse(new Date()) / 1000;
if (expire < now + 3)
{
expire=now+60*10;//10分钟有效期，实际以服务器返回的Expiration有效期为准
body = send_request()
var obj = eval ("(" + body + ")");
// host = obj['host']
//policyBase64 = obj['policy']
accessid = obj['AccessKeyId']
//alert(accessid);
accesskey = obj['AccessKeySecret']
token = obj['SecurityToken']
// signature = obj['signature']
// expire = parseInt(obj['Expiration']) ////需要进行转换 "Expiration":"2019-11-03T04:13:14Z"
// callbackbody = obj['callback']
// key = obj['dir']
policyText["expiration"]=obj['Expiration']
policyBase64 = Base64.encode(JSON.stringify(policyText))
message = policyBase64
bytes = Crypto.HMAC(Crypto.SHA1, message, accesskey, { asBytes: true })
signature = Crypto.util.bytesToBase64(bytes);
/* newwwwwwwwwwwwww
var policyText = {
"expiration": "2020-01-01T12:00:00.000Z", //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, 1048576000] // 设置上传文件的大小限制
]
};
var policyBase64 = Base64.encode(JSON.stringify(policyText))
message = policyBase64
var bytes = Crypto.HMAC(Crypto.SHA1, message, accesskey, { asBytes: true }) ;
var signature = Crypto.util.bytesToBase64(bytes);
*/
return true;
}
return false;
};
function check_object_radio() {
var tt = document.getElementsByName('myradio');
for (var i = 0; i < tt.length ; i++ )
{
if(tt[i].checked)
{
g_object_name_type = tt[i].value;
break;
}
}
}
function get_dirname()
{
dir = document.getElementById("dirname").value;
if (dir != '' && dir.indexOf('/') != dir.length - 1)
{
dir = dir + '/'
}
//alert(dir)
g_dirname = dir
}
function random_string(len) {
len = len || 32;
var chars = 'ABCDEFGHJKMNPQRSTWXYZabcdefhijkmnprstwxyz2345678';
var maxPos = chars.length;
var pwd = '';
for (i = 0; i < len; i++) {
pwd += chars.charAt(Math.floor(Math.random() * maxPos));
}
return pwd;
}
function get_suffix(filename) {
pos = filename.lastIndexOf('.')
suffix = ''
if (pos != -1) {
suffix = filename.substring(pos)
}
return suffix;
}
function calculate_object_name(filename)
{
if (g_object_name_type == 'local_name')
{
g_object_name += "${filename}"
}
else if (g_object_name_type == 'random_name')
{
suffix = get_suffix(filename)
g_object_name = g_dirname + random_string(10) + suffix
}
return ''
}
function get_uploaded_object_name(filename)
{
if (g_object_name_type == 'local_name')
{
tmp_name = g_object_name
tmp_name = tmp_name.replace("${filename}", filename);
return tmp_name
}
else if(g_object_name_type == 'random_name')
{
return g_object_name
}
}
function set_upload_param(up, filename, ret)
{
if (ret == false)
{
ret = get_signature()
}///newwwwwwwwwwwwww
g_object_name = g_dirname;
if (filename != '') {
suffix = get_suffix(filename)
calculate_object_name(filename)
}
new_multipart_params = {
'key' : g_object_name,
'policy': policyBase64,
'OSSAccessKeyId': accessid,
'x-oss-security-token':token,
'success_action_status' : '200', //让服务端返回200,不然，默认会返回204
'signature': signature,
};
up.setOption({
'url': host,
'multipart_params': new_multipart_params
});
up.start();
}
var uploader = new plupload.Uploader({
runtimes : 'html5,flash,silverlight,html4',
browse_button : 'selectfiles',
//multi_selection: false,
container: document.getElementById('container'),
flash_swf_url : 'lib/plupload-2.1.2/js/Moxie.swf',
silverlight_xap_url : 'lib/plupload-2.1.2/js/Moxie.xap',
url : 'http://oss.aliyuncs.com',
init: {
PostInit: function() {
document.getElementById('ossfile').innerHTML = '';
document.getElementById('postfiles').onclick = function() {
set_upload_param(uploader, '', false);
return false;
};
},
FilesAdded: function(up, files) {
plupload.each(files, function(file) { document.getElementById('ossfile').innerHTML += '<div id="' + file.id + '">' + file.name + ' (' + plupload.formatSize(file.size) + ')<b></b>'
+'<div class="progress"><div class="progress-bar" style="width: 0%"></div></div>'
+'</div>';
});
},
BeforeUpload: function(up, file) {
check_object_radio();
get_dirname();
set_upload_param(up, file.name, true);
},
UploadProgress: function(up, file) {
var d = document.getElementById(file.id);
d.getElementsByTagName('b')[0].innerHTML = '<span>' + file.percent + "%</span>";
var prog = d.getElementsByTagName('div')[0];
var progBar = prog.getElementsByTagName('div')[0]
progBar.style.width= 2*file.percent+'px';
progBar.setAttribute('aria-valuenow', file.percent);
},
FileUploaded: function(up, file, info) {
if (info.status == 200)
{
document.getElementById(file.id).getElementsByTagName('b')[0].innerHTML = 'upload to oss success, object name:' + get_uploaded_object_name(file.name);
}
else
{
document.getElementById(file.id).getElementsByTagName('b')[0].innerHTML = info.response;
}
},
Error: function(up, err) { document.getElementById('console').appendChild(document.createTextNode("\nError xml:" + err.response));
}
}
});
uploader.init();
config.json
{
"AccessKeyID" : "LTAI4FnFHMcUUtr9P",
"AccessKeySecret" : "MRaya4xBsQaYA9bwknlE8D1",
"RoleArn" : "acs:ram::1971409755302376:role/aliyunosstokengeneratorrole",
"BucketName" : "public-files",
"Endpoint" : "oss-cn-beijing.aliyuncs.com",
"TokenExpireTime" : "900",
"PolicyFile": "policy/bucket_write_policy_full.txt"
}
本sts上传阿里云oss的项目代码已托管码云：https://gitee.com/rorgent/related-to-alibaba-cloud/tree/master/%E9%98%BF%E9%87%8C%E4%BA%91oss%E5%89%8D%E7%AB%AF%E7%9B%B4%E4%BC%A0STS
基于互联网精神，在注明出处的前提下本站文章可自由转载！
本文链接：https://ranjuan.cn/aliyun-oss-sts/
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