func ExampleV4Signer() {
// Get auth from env vars
auth, err := aws.EnvAuth()
if err != nil {
fmt.Println(err)
}
// Create a signer with the auth, name of the service, and aws region
signer := aws.NewV4Signer(auth, "dynamodb", aws.USEast)
// Create a request
req, err := http.NewRequest("POST", aws.USEast.DynamoDBEndpoint, strings.NewReader("sample_request"))
if err != nil {
fmt.Println(err)
}
// Date or x-amz-date header is required to sign a request
req.Header.Add("Date", time.Now().UTC().Format(http.TimeFormat))
// Sign the request
signer.Sign(req)
// Issue signed request
http.DefaultClient.Do(req)
}
func (s *V4SignerSuite) TestCases(c *gocheck.C) {
signer := aws.NewV4Signer(s.auth, "host", s.region)
for _, testCase := range s.cases {
req, err := http.NewRequest(testCase.request.method, "http://"+testCase.request.host+testCase.request.url, strings.NewReader(testCase.request.body))
c.Assert(err, gocheck.IsNil, gocheck.Commentf("Testcase: %s", testCase.label))
for _, v := range testCase.request.headers {
h := strings.SplitN(v, ":", 2)
req.Header.Add(h[0], h[1])
}
req.Header.Set("host", req.Host)
t := signer.RequestTime(req)
canonicalRequest := signer.CanonicalRequest(req)
c.Check(canonicalRequest, gocheck.Equals, testCase.canonicalRequest, gocheck.Commentf("Testcase: %s", testCase.label))
stringToSign := signer.StringToSign(t, canonicalRequest)
c.Check(stringToSign, gocheck.Equals, testCase.stringToSign, gocheck.Commentf("Testcase: %s", testCase.label))
signature := signer.Signature(t, stringToSign)
c.Check(signature, gocheck.Equals, testCase.signature, gocheck.Commentf("Testcase: %s", testCase.label))
authorization := signer.Authorization(req.Header, t, signature)
c.Check(authorization, gocheck.Equals, testCase.authorization, gocheck.Commentf("Testcase: %s", testCase.label))
signer.Sign(req)
c.Check(req.Header.Get("Authorization"), gocheck.Equals, testCase.authorization, gocheck.Commentf("Testcase: %s", testCase.label))
}
}
func (s *Server) queryServer(target string, query *Query) ([]byte, error) {
data := strings.NewReader(query.String())
hreq, err := http.NewRequest("POST", s.Region.DynamoDBEndpoint+"/", data)
if err != nil {
return nil, err
}
hreq.Header.Set("Content-Type", "application/x-amz-json-1.0")
hreq.Header.Set("X-Amz-Date", time.Now().UTC().Format(aws.ISO8601BasicFormat))
hreq.Header.Set("X-Amz-Target", target)
token := s.Auth.Token()
if token != "" {
hreq.Header.Set("X-Amz-Security-Token", token)
}
signer := aws.NewV4Signer(s.Auth, "dynamodb", s.Region)
signer.Sign(hreq)
resp, err := http.DefaultClient.Do(hreq)
if err != nil {
log.Printf("Error calling Amazon")
return nil, err
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
log.Printf("Could not read response body")
return nil, err
}
// http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ErrorHandling.html
// "A response code of 200 indicates the operation was successful."
if resp.StatusCode != 200 {
ddbErr := buildError(resp, body)
return nil, ddbErr
}
return body, nil
}