// Sign requests with signature version 4.
//
// Will sign the requests with the service config's Credentials object
// Signing is skipped if the credentials is the credentials.AnonymousCredentials
// object.
func Sign(req *request.Request) {
// If the request does not need to be signed ignore the signing of the
// request if the AnonymousCredentials object is used.
if req.Service.Config.Credentials == credentials.AnonymousCredentials {
return
}
region := req.Service.SigningRegion
if region == "" {
region = aws.StringValue(req.Service.Config.Region)
}
name := req.Service.SigningName
if name == "" {
name = req.Service.ServiceName
}
s := signer{
Request: req.HTTPRequest,
Time: req.Time,
ExpireTime: req.ExpireTime,
Query: req.HTTPRequest.URL.Query(),
Body: req.Body,
ServiceName: name,
Region: region,
Credentials: req.Service.Config.Credentials,
Debug: req.Service.Config.LogLevel.Value(),
Logger: req.Service.Config.Logger,
}
req.Error = s.sign()
}
// buildEndpoint builds the endpoint values the service will use to make requests with.
func (s *Service) buildEndpoint() {
if aws.StringValue(s.Config.Endpoint) != "" {
s.Endpoint = *s.Config.Endpoint
} else if s.Endpoint == "" {
s.Endpoint, s.SigningRegion =
endpoints.EndpointForRegion(s.ServiceName, aws.StringValue(s.Config.Region))
}
if s.Endpoint != "" && !schemeRE.MatchString(s.Endpoint) {
scheme := "https"
if aws.BoolValue(s.Config.DisableSSL) {
scheme = "http"
}
s.Endpoint = scheme + "://" + s.Endpoint
}
}
func unmarshalError(r *request.Request) {
defer r.HTTPResponse.Body.Close()
if r.HTTPResponse.StatusCode == http.StatusMovedPermanently {
r.Error = awserr.New("BucketRegionError",
fmt.Sprintf("incorrect region, the bucket is not in '%s' region", aws.StringValue(r.Service.Config.Region)), nil)
return
}
if r.HTTPResponse.ContentLength == int64(0) {
// No body, use status code to generate an awserr.Error
r.Error = awserr.NewRequestFailure(
awserr.New(strings.Replace(r.HTTPResponse.Status, " ", "", -1), r.HTTPResponse.Status, nil),
r.HTTPResponse.StatusCode,
"",
)
return
}
resp := &xmlErrorResponse{}
err := xml.NewDecoder(r.HTTPResponse.Body).Decode(resp)
if err != nil && err != io.EOF {
r.Error = awserr.New("SerializationError", "failed to decode S3 XML error response", nil)
} else {
r.Error = awserr.NewRequestFailure(
awserr.New(resp.Code, resp.Message, nil),
r.HTTPResponse.StatusCode,
"",
)
}
}
func populateLocationConstraint(r *request.Request) {
if r.ParamsFilled() && aws.StringValue(r.Service.Config.Region) != "us-east-1" {
in := r.Params.(*CreateBucketInput)
if in.CreateBucketConfiguration == nil {
r.Params = awsutil.CopyOf(r.Params)
in = r.Params.(*CreateBucketInput)
in.CreateBucketConfiguration = &CreateBucketConfiguration{
LocationConstraint: r.Service.Config.Region,
}
}
}
}
if r.Retryable == nil {
r.Retryable = aws.Bool(r.ShouldRetry(r))
}
if r.WillRetry() {
r.RetryDelay = r.RetryRules(r)
r.Service.Config.SleepDelay(r.RetryDelay)
// when the expired token exception occurs the credentials
// need to be expired locally so that the next request to
// get credentials will trigger a credentials refresh.
if r.IsErrorExpired() {
r.Service.Config.Credentials.Expire()
}
r.RetryCount++
r.Error = nil
}
}}
// ValidateEndpointHandler is a request handler to validate a request had the
// appropriate Region and Endpoint set. Will set r.Error if the endpoint or
// region is not valid.
var ValidateEndpointHandler = request.NamedHandler{"core.ValidateEndpointHandler", func(r *request.Request) {
if r.Service.SigningRegion == "" && aws.StringValue(r.Service.Config.Region) == "" {
r.Error = aws.ErrMissingRegion
} else if r.Service.Endpoint == "" {
r.Error = aws.ErrMissingEndpoint
}
}}