The same set of code returns normally sometimes and reports an error sometimes. Signature error authfailure SignatureFailure

The same code , Sometimes normal return , Sometimes the signature error is returned AuthFailure.SignatureFailure

{

"Response": {

"Error": {

"Code": "AuthFailure.SignatureFailure",

"Message": "The provided credentials could not be validated. Please check your signature is correct."

},

"RequestId": "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"

}

Compared with , There are no special characters in the successful signature , Among the failures are + Number and other special characters

Read the official website signature algorithm document carefully , Found missing urlencode link , Normally ,get request , The final strings involved in string splicing are urlencode After the , There should be no + Number , Yes + No. means that urlencode link

V1 Algorithm ：

V3 Algorithm ：