php阿里云oss文件上传
oss_accessid = '' oss_accessoss_key = ''oss_host = ''
oss_policyBase64 = ''
oss_signature = ''
oss_callbackbody = ''
oss_filename = ''
oss_key = ''
oss_expire = 0
g_object_name = ''
g_object_name_type = 'local_name'
OSS_FILE_NAME_TYPE_LOCAL = "local_name"
OSS_FILE_NAME_TYPE_RANDOM = "random_name"
oss_now = oss_timestamp = Date.parse(new Date()) / 1000;
//向服务端请求policy
function send_request() {
}
//生成签名
function get_oss_signature() {
//可以判断当前oss_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 做为缓冲
oss_now = oss_timestamp = Date.parse(new Date()) / 1000;
if (oss_expire < oss_now + 3) {
body = send_request()
var obj = eval("(" + body + ")");
oss_host = obj['host']
oss_policyBase64 = obj['policy']
oss_accessid = obj['accessid']
oss_signature = obj['signature']
oss_expire = parseInt(obj['expire'])
oss_callbackbody = obj['callback']
oss_key = obj['dir']
}
}
//随机字符串
function random_string(len) {
len = len || 32;
var chars = 'ABCDEFGHJKMNPQRSTWXYZabcdefhijkmnprstwxyz2345678';
var maxPos = chars.length;
var str = '';
for (i = 0; i < len; i++) {
str += chars.charAt(Math.floor(Math.random() * maxPos));
}
return str;
}
//获取文件名后缀
function get_suffix(filename) {
pos = filename.lastIndexOf('.')
suffix = ''
if (pos != -1) {
suffix = filename.substring(pos)
}
return suffix;
}
//根据文件名类型 临时文件还是原始文件名，返回文件名
function calculate_object_name(filename) {
if (g_object_name_type == 'local_name') {
g_object_name = oss_key + "${filename}"
}
else if (g_object_name_type == 'random_name') {
suffix = get_suffix(filename)
g_object_name = oss_key + random_string(10) + suffix
}
return ''
}
//把policy填充到Formdata里
function set_upload_param(file) {
get_oss_signature()
if (file) {
calculate_object_name(file.name);
var res = {
'key': g_object_name,
'policy': oss_policyBase64,
'OSSAccessKeyId': oss_accessid,
'success_action_status': '200', //让服务端返回200,不然，默认会返回204
// 'callback': oss_callbackbody,
'signature': oss_signature,
};
var form_data = new FormData();
for ( var key in res ) {
form_data.append(key, res);
}
form_data.append("file",file);
return res;
}
return false;
}
//上传到阿里云 callBack 是用来在上传成功后通知服务端
function OssUpload( file,fileNameType,callBack) {
g_object_name_type = fileNameType;
var form_data = set_upload_param(file.name);
if(!form_data){
alert("form_data error")
return
}
var fileFullName = oss_host+form_data.get("key");
$.ajax({
url: oss_host,
data: form_data,
processData: false,
cache: false,
async: false,
type:'POST',
contentType: false,//这个就是了
success: function (data, textStatus, request) {
//textStatus === "success" 表示成功
if(typeof callBack === "function") {
callBack(fileFullName,form_data.get("policy"),textStatus);
}
},
error : function(responseStr) {
if(typeof callBack === "function") {
callBack(fileFullName,form_data.get("policy"),responseStr.responseText);
}
}
});
}
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