用lua 生成上传凭证（token），总是报错"bad token"

发布于
2015-11-04

更新于
2015-11-22

我生成token的代码：

 function getUploadToken()
        local ACCESSKEY = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
        local SECRETKEY = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
        local policy = {}
        local returnBody = '{"key":$(key),"hash":$(etag),"w":$(imageInfo.width),"h":$(imageInfo.height),"size":$(fsize)}'
        
        policy.scope = "nwtop"
        policy.deadline = os.time() + 3600000
        policy.returnBody = returnBody --cjson.encode()
    
        local putPolicy = cjson.encode(policy)
        local encodedPutPolicy  = urlsafe_base64(ngx.encode_base64(putPolicy))
    
        local sign = ngx.hmac_sha1(SECRETKEY,encodedPutPolicy)
        local encodeSign = urlsafe_base64(ngx.encode_base64(sign))
    
        local upload_token = ACCESSKEY .. ":".. encodeSign .. ":" .. encodedPutPolicy
        return upload_token
    end

    function urlsafe_base64(str)
        local _str = str_gsub(str,"+","-")
        _str = str_gsub(_str,"/","_")
        return _str
    end