// UnmarshalError unmarshals a response error for the REST JSON protocol.
func UnmarshalError(r *service.Request) {
code := r.HTTPResponse.Header.Get("X-Amzn-Errortype")
bodyBytes, err := ioutil.ReadAll(r.HTTPResponse.Body)
if err != nil {
r.Error = awserr.New("SerializationError", "failed reading REST JSON error response", err)
return
}
if len(bodyBytes) == 0 {
r.Error = awserr.NewRequestFailure(
awserr.New("SerializationError", r.HTTPResponse.Status, nil),
r.HTTPResponse.StatusCode,
"",
)
return
}
var jsonErr jsonErrorResponse
if err := json.Unmarshal(bodyBytes, &jsonErr); err != nil {
r.Error = awserr.New("SerializationError", "failed decoding REST JSON error response", err)
return
}
if code == "" {
code = jsonErr.Code
}
codes := strings.SplitN(code, ":", 2)
r.Error = awserr.NewRequestFailure(
awserr.New(codes[0], jsonErr.Message, nil),
r.HTTPResponse.StatusCode,
"",
)
}
// UnmarshalError unmarshals an error response for a JSON RPC service.
func UnmarshalError(req *service.Request) {
defer req.HTTPResponse.Body.Close()
bodyBytes, err := ioutil.ReadAll(req.HTTPResponse.Body)
if err != nil {
req.Error = awserr.New("SerializationError", "failed reading JSON RPC error response", err)
return
}
if len(bodyBytes) == 0 {
req.Error = awserr.NewRequestFailure(
awserr.New("SerializationError", req.HTTPResponse.Status, nil),
req.HTTPResponse.StatusCode,
"",
)
return
}
var jsonErr jsonErrorResponse
if err := json.Unmarshal(bodyBytes, &jsonErr); err != nil {
req.Error = awserr.New("SerializationError", "failed decoding JSON RPC error response", err)
return
}
codes := strings.SplitN(jsonErr.Code, "#", 2)
req.Error = awserr.NewRequestFailure(
awserr.New(codes[len(codes)-1], jsonErr.Message, nil),
req.HTTPResponse.StatusCode,
"",
)
}
func unmarshalError(r *service.Request) {
defer r.HTTPResponse.Body.Close()
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,
"",
)
}
}
// UnmarshalError unmarshals a response error for the EC2 protocol.
func UnmarshalError(r *service.Request) {
defer r.HTTPResponse.Body.Close()
resp := &xmlErrorResponse{}
err := xml.NewDecoder(r.HTTPResponse.Body).Decode(resp)
if err != nil && err != io.EOF {
r.Error = awserr.New("SerializationError", "failed decoding EC2 Query error response", err)
} else {
r.Error = awserr.NewRequestFailure(
awserr.New(resp.Code, resp.Message, nil),
r.HTTPResponse.StatusCode,
resp.RequestID,
)
}
}
// 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 *service.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()
}
// Build builds a JSON payload for a JSON RPC request.
func Build(req *service.Request) {
var buf []byte
var err error
if req.ParamsFilled() {
buf, err = jsonutil.BuildJSON(req.Params)
if err != nil {
req.Error = awserr.New("SerializationError", "failed encoding JSON RPC request", err)
return
}
} else {
buf = emptyJSON
}
if req.Service.TargetPrefix != "" || string(buf) != "{}" {
req.SetBufferBody(buf)
}
if req.Service.TargetPrefix != "" {
target := req.Service.TargetPrefix + "." + req.Operation.Name
req.HTTPRequest.Header.Add("X-Amz-Target", target)
}
if req.Service.JSONVersion != "" {
jsonVersion := req.Service.JSONVersion
req.HTTPRequest.Header.Add("Content-Type", "application/x-amz-json-"+jsonVersion)
}
}
func buildHeader(r *service.Request, v reflect.Value, name string) {
str, err := convertType(v)
if err != nil {
r.Error = awserr.New("SerializationError", "failed to encode REST request", err)
} else if str != nil {
r.HTTPRequest.Header.Add(name, *str)
}
}
func buildQueryString(r *service.Request, v reflect.Value, name string, query url.Values) {
str, err := convertType(v)
if err != nil {
r.Error = awserr.New("SerializationError", "failed to encode REST request", err)
} else if str != nil {
query.Set(name, *str)
}
}
func validateSSERequiresSSL(r *service.Request) {
if r.HTTPRequest.URL.Scheme != "https" {
p := awsutil.ValuesAtPath(r.Params, "SSECustomerKey||CopySourceSSECustomerKey")
if len(p) > 0 {
r.Error = errSSERequiresSSL
}
}
}
func unmarshalError(r *service.Request) {
defer r.HTTPResponse.Body.Close()
_, err := ioutil.ReadAll(r.HTTPResponse.Body)
if err != nil {
r.Error = awserr.New("SerializationError", "unable to unmarshal EC2 metadata error respose", err)
}
// TODO extract the error...
}
// Unmarshal unmarshals a response for a JSON RPC service.
func Unmarshal(req *service.Request) {
defer req.HTTPResponse.Body.Close()
if req.DataFilled() {
err := jsonutil.UnmarshalJSON(req.Data, req.HTTPResponse.Body)
if err != nil {
req.Error = awserr.New("SerializationError", "failed decoding JSON RPC response", err)
}
}
return
}
func buildHeaderMap(r *service.Request, v reflect.Value, prefix string) {
for _, key := range v.MapKeys() {
str, err := convertType(v.MapIndex(key))
if err != nil {
r.Error = awserr.New("SerializationError", "failed to encode REST request", err)
} else if str != nil {
r.HTTPRequest.Header.Add(prefix+key.String(), *str)
}
}
}
func unmarshalHandler(r *service.Request) {
defer r.HTTPResponse.Body.Close()
b, err := ioutil.ReadAll(r.HTTPResponse.Body)
if err != nil {
r.Error = awserr.New("SerializationError", "unable to unmarshal EC2 metadata respose", err)
}
data := r.Data.(*metadataOutput)
data.Content = string(b)
}
// Unmarshal unmarshals a payload response for the REST XML protocol.
func Unmarshal(r *service.Request) {
if t := rest.PayloadType(r.Data); t == "structure" || t == "" {
defer r.HTTPResponse.Body.Close()
decoder := xml.NewDecoder(r.HTTPResponse.Body)
err := xmlutil.UnmarshalXML(r.Data, decoder, "")
if err != nil {
r.Error = awserr.New("SerializationError", "failed to decode REST XML response", err)
return
}
}
}
// Unmarshal unmarshals a response for an AWS Query service.
func Unmarshal(r *service.Request) {
defer r.HTTPResponse.Body.Close()
if r.DataFilled() {
decoder := xml.NewDecoder(r.HTTPResponse.Body)
err := xmlutil.UnmarshalXML(r.Data, decoder, r.Operation.Name+"Result")
if err != nil {
r.Error = awserr.New("SerializationError", "failed decoding Query response", err)
return
}
}
}
func buildURI(r *service.Request, v reflect.Value, name string) {
value, err := convertType(v)
if err != nil {
r.Error = awserr.New("SerializationError", "failed to encode REST request", err)
} else if value != nil {
uri := r.HTTPRequest.URL.Path
uri = strings.Replace(uri, "{"+name+"}", EscapePath(*value, true), -1)
uri = strings.Replace(uri, "{"+name+"+}", EscapePath(*value, false), -1)
r.HTTPRequest.URL.Path = uri
}
}
func unmarshalBody(r *service.Request, v reflect.Value) {
if field, ok := v.Type().FieldByName("SDKShapeTraits"); ok {
if payloadName := field.Tag.Get("payload"); payloadName != "" {
pfield, _ := v.Type().FieldByName(payloadName)
if ptag := pfield.Tag.Get("type"); ptag != "" && ptag != "structure" {
payload := v.FieldByName(payloadName)
if payload.IsValid() {
switch payload.Interface().(type) {
case []byte:
b, err := ioutil.ReadAll(r.HTTPResponse.Body)
if err != nil {
r.Error = awserr.New("SerializationError", "failed to decode REST response", err)
} else {
payload.Set(reflect.ValueOf(b))
}
case *string:
b, err := ioutil.ReadAll(r.HTTPResponse.Body)
if err != nil {
r.Error = awserr.New("SerializationError", "failed to decode REST response", err)
} else {
str := string(b)
payload.Set(reflect.ValueOf(&str))
}
default:
switch payload.Type().String() {
case "io.ReadSeeker":
payload.Set(reflect.ValueOf(aws.ReadSeekCloser(r.HTTPResponse.Body)))
case "aws.ReadSeekCloser", "io.ReadCloser":
payload.Set(reflect.ValueOf(r.HTTPResponse.Body))
default:
r.Error = awserr.New("SerializationError",
"failed to decode REST response",
fmt.Errorf("unknown payload type %s", payload.Type()))
}
}
}
}
}
}
}
// Build builds a request payload for the REST XML protocol.
func Build(r *service.Request) {
rest.Build(r)
if t := rest.PayloadType(r.Params); t == "structure" || t == "" {
var buf bytes.Buffer
err := xmlutil.BuildXML(r.Params, xml.NewEncoder(&buf))
if err != nil {
r.Error = awserr.New("SerializationError", "failed to enode rest XML request", err)
return
}
r.SetBufferBody(buf.Bytes())
}
}
// contentMD5 computes and sets the HTTP Content-MD5 header for requests that
// require it.
func contentMD5(r *service.Request) {
h := md5.New()
// hash the body. seek back to the first position after reading to reset
// the body for transmission. copy errors may be assumed to be from the
// body.
_, err := io.Copy(h, r.Body)
if err != nil {
r.Error = awserr.New("ContentMD5", "failed to read body", err)
return
}
_, err = r.Body.Seek(0, 0)
if err != nil {
r.Error = awserr.New("ContentMD5", "failed to seek body", err)
return
}
// encode the md5 checksum in base64 and set the request header.
sum := h.Sum(nil)
sum64 := make([]byte, base64.StdEncoding.EncodedLen(len(sum)))
base64.StdEncoding.Encode(sum64, sum)
r.HTTPRequest.Header.Set("Content-MD5", string(sum64))
}
// updatePredictEndpoint rewrites the request endpoint to use the
// "PredictEndpoint" parameter of the Predict operation.
func updatePredictEndpoint(r *service.Request) {
if !r.ParamsFilled() {
return
}
r.Endpoint = *r.Params.(*PredictInput).PredictEndpoint
uri, err := url.Parse(r.Endpoint)
if err != nil {
r.Error = err
return
}
r.HTTPRequest.URL = uri
}
func unmarshalLocationElements(r *service.Request, v reflect.Value) {
for i := 0; i < v.NumField(); i++ {
m, field := v.Field(i), v.Type().Field(i)
if n := field.Name; n[0:1] == strings.ToLower(n[0:1]) {
continue
}
if m.IsValid() {
name := field.Tag.Get("locationName")
if name == "" {
name = field.Name
}
switch field.Tag.Get("location") {
case "statusCode":
unmarshalStatusCode(m, r.HTTPResponse.StatusCode)
case "header":
err := unmarshalHeader(m, r.HTTPResponse.Header.Get(name))
if err != nil {
r.Error = awserr.New("SerializationError", "failed to decode REST response", err)
break
}
case "headers":
prefix := field.Tag.Get("locationName")
err := unmarshalHeaderMap(m, r.HTTPResponse.Header, prefix)
if err != nil {
r.Error = awserr.New("SerializationError", "failed to decode REST response", err)
break
}
}
}
if r.Error != nil {
return
}
}
}
func buildGetBucketLocation(r *service.Request) {
if r.DataFilled() {
out := r.Data.(*GetBucketLocationOutput)
b, err := ioutil.ReadAll(r.HTTPResponse.Body)
if err != nil {
r.Error = awserr.New("SerializationError", "failed reading response body", err)
return
}
match := reBucketLocation.FindSubmatch(b)
if len(match) > 1 {
loc := string(match[1])
out.LocationConstraint = &loc
}
}
}
// Build builds a request for the EC2 protocol.
func Build(r *service.Request) {
body := url.Values{
"Action": {r.Operation.Name},
"Version": {r.Service.APIVersion},
}
if err := queryutil.Parse(body, r.Params, true); err != nil {
r.Error = awserr.New("SerializationError", "failed encoding EC2 Query request", err)
}
if r.ExpireTime == 0 {
r.HTTPRequest.Method = "POST"
r.HTTPRequest.Header.Set("Content-Type", "application/x-www-form-urlencoded; charset=utf-8")
r.SetBufferBody([]byte(body.Encode()))
} else { // This is a pre-signed request
r.HTTPRequest.Method = "GET"
r.HTTPRequest.URL.RawQuery = body.Encode()
}
}
func fillPresignedURL(r *service.Request) {
if !r.ParamsFilled() {
return
}
params := r.Params.(*CopySnapshotInput)
// Stop if PresignedURL/DestinationRegion is set
if params.PresignedUrl != nil || params.DestinationRegion != nil {
return
}
// First generate a copy of parameters
r.Params = awsutil.CopyOf(r.Params)
params = r.Params.(*CopySnapshotInput)
// Set destination region. Avoids infinite handler loop.
// Also needed to sign sub-request.
params.DestinationRegion = r.Service.Config.Region
// Create a new client pointing at source region.
// We will use this to presign the CopySnapshot request against
// the source region
config := r.Service.Config.Copy().
WithEndpoint("").
WithRegion(*params.SourceRegion)
client := New(config)
// Presign a CopySnapshot request with modified params
req, _ := client.CopySnapshotRequest(params)
url, err := req.Presign(300 * time.Second) // 5 minutes should be enough.
if err != nil { // bubble error back up to original request
r.Error = err
}
// We have our URL, set it on params
params.PresignedUrl = &url
}
func validateCRC32(r *service.Request) {
if r.Error != nil {
return // already have an error, no need to verify CRC
}
// Checksum validation is off, skip
if aws.BoolValue(r.Service.Config.DisableComputeChecksums) {
return
}
// Try to get CRC from response
header := r.HTTPResponse.Header.Get("X-Amz-Crc32")
if header == "" {
return // No header, skip
}
expected, err := strconv.ParseUint(header, 10, 32)
if err != nil {
return // Could not determine CRC value, skip
}
buf, err := drainBody(r.HTTPResponse.Body)
if err != nil { // failed to read the response body, skip
return
}
// Reset body for subsequent reads
r.HTTPResponse.Body = ioutil.NopCloser(bytes.NewReader(buf.Bytes()))
// Compute the CRC checksum
crc := crc32.ChecksumIEEE(buf.Bytes())
if crc != uint32(expected) {
// CRC does not match, set a retryable error
r.Retryable = aws.Bool(true)
r.Error = awserr.New("CRC32CheckFailed", "CRC32 integrity check failed", nil)
}
}
func buildBody(r *service.Request, v reflect.Value) {
if field, ok := v.Type().FieldByName("SDKShapeTraits"); ok {
if payloadName := field.Tag.Get("payload"); payloadName != "" {
pfield, _ := v.Type().FieldByName(payloadName)
if ptag := pfield.Tag.Get("type"); ptag != "" && ptag != "structure" {
payload := reflect.Indirect(v.FieldByName(payloadName))
if payload.IsValid() && payload.Interface() != nil {
switch reader := payload.Interface().(type) {
case io.ReadSeeker:
r.SetReaderBody(reader)
case []byte:
r.SetBufferBody(reader)
case string:
r.SetStringBody(reader)
default:
r.Error = awserr.New("SerializationError",
"failed to encode REST request",
fmt.Errorf("unknown payload type %s", payload.Type()))
}
}
}
}
}
}
func validateEndpointHandler(r *service.Request) {
if r.Service.Endpoint == "" {
r.Error = service.ErrMissingEndpoint
}
}
func setChecksumError(r *service.Request, format string, args ...interface{}) {
r.Retryable = aws.Bool(true)
r.Error = awserr.New("InvalidChecksum", fmt.Sprintf(format, args...), nil)
}