SignatureDoesNotMatch error using restTemplate to get url request of S3-CodePudding

I'm trying to send a HTTP GET request of S3 using restTemplate and I get SignatureDoesNotMatch error: The request signature we calculated does not match the signature you provided. Check your key and signing method.

Dose anyone know what can cause this error?

CodePudding user response：

Found the problem!

Apparently that my question wasn't accurate, just like the error I got from S3 - not indicative.

What I was actually searching for is how to download a file from S3 url using Rest Template. So I had to add the following configuration and used this code to solve it:

RestTemplate restTemplate = new RestTemplate();
restTemplate.getMessageConverters().add(new ByteArrayHttpMessageConverter());
HttpHeaders headers = new HttpHeaders();
String url = URLDecoder.decode(path, "UTF-8");
ResponseEntity<byte[]> response = restTemplate.exchange(url, HttpMethod.GET, new HttpEntity<>(headers), byte[].class);