Golang awserr.New函数代码示例

func unmarshalError(req *request.Request) {
	bodyBytes, err := ioutil.ReadAll(req.HTTPResponse.Body)
	if err != nil {
		req.Error = awserr.New("UnmarshaleError", req.HTTPResponse.Status, err)
		return
	}
	if len(bodyBytes) == 0 {
		req.Error = awserr.NewRequestFailure(
			awserr.New("UnmarshaleError", req.HTTPResponse.Status, fmt.Errorf("empty body")),
			req.HTTPResponse.StatusCode,
			"",
		)
		return
	}
	var jsonErr jsonErrorResponse
	if err := json.Unmarshal(bodyBytes, &jsonErr); err != nil {
		req.Error = awserr.New("UnmarshaleError", "JSON unmarshal", err)
		return
	}
	req.Error = awserr.NewRequestFailure(
		awserr.New(jsonErr.Code, jsonErr.Message, nil),
		req.HTTPResponse.StatusCode,
		"",
	)
}

// loadProfiles loads from the file pointed to by shared credentials filename for profile.
// The credentials retrieved from the profile will be returned or error. Error will be
// returned if it fails to read from the file, or the data is invalid.
func loadProfile(filename, profile string) (Value, error) {
	config, err := ini.Load(filename)
	if err != nil {
		return Value{}, awserr.New("SharedCredsLoad", "failed to load shared credentials file", err)
	}
	iniProfile, err := config.GetSection(profile)
	if err != nil {
		return Value{}, awserr.New("SharedCredsLoad", "failed to get profile", err)
	}

	id, err := iniProfile.GetKey("aws_access_key_id")
	if err != nil {
		return Value{}, awserr.New("SharedCredsAccessKey",
			fmt.Sprintf("shared credentials %s in %s did not contain aws_access_key_id", profile, filename),
			err)
	}

	secret, err := iniProfile.GetKey("aws_secret_access_key")
	if err != nil {
		return Value{}, awserr.New("SharedCredsSecret",
			fmt.Sprintf("shared credentials %s in %s did not contain aws_secret_access_key", profile, filename),
			nil)
	}

	// Default to empty string if not found
	token := iniProfile.Key("aws_session_token")

	return Value{
		AccessKeyID:     id.String(),
		SecretAccessKey: secret.String(),
		SessionToken:    token.String(),
	}, nil
}

// UnmarshalError unmarshals an error response for a JSON RPC service.
func UnmarshalError(req *request.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,
		req.RequestID,
	)
}

func TestAfterRetryRefreshCreds(t *testing.T) {
	os.Clearenv()
	credProvider := &mockCredsProvider{}

	svc := awstesting.NewClient(&aws.Config{
		Credentials: credentials.NewCredentials(credProvider),
		MaxRetries:  aws.Int(1),
	})

	svc.Handlers.Clear()
	svc.Handlers.ValidateResponse.PushBack(func(r *request.Request) {
		r.Error = awserr.New("UnknownError", "", nil)
		r.HTTPResponse = &http.Response{StatusCode: 400}
	})
	svc.Handlers.UnmarshalError.PushBack(func(r *request.Request) {
		r.Error = awserr.New("ExpiredTokenException", "", nil)
	})
	svc.Handlers.AfterRetry.PushBackNamed(corehandlers.AfterRetryHandler)

	assert.True(t, svc.Config.Credentials.IsExpired(), "Expect to start out expired")
	assert.False(t, credProvider.retrieveCalled)

	req := svc.NewRequest(&request.Operation{Name: "Operation"}, nil, nil)
	req.Send()

	assert.True(t, svc.Config.Credentials.IsExpired())
	assert.False(t, credProvider.retrieveCalled)

	_, err := svc.Config.Credentials.Get()
	assert.NoError(t, err)
	assert.True(t, credProvider.retrieveCalled)
}

func buildQueryString(query url.Values, v reflect.Value, name string) error {
	switch value := v.Interface().(type) {
	case []*string:
		for _, item := range value {
			query.Add(name, *item)
		}
	case map[string]*string:
		for key, item := range value {
			query.Add(key, *item)
		}
	case map[string][]*string:
		for key, items := range value {
			for _, item := range items {
				query.Add(key, *item)
			}
		}
	default:
		str, err := convertType(v)
		if err == errValueNotSet {
			return nil
		} else if err != nil {
			return awserr.New("SerializationError", "failed to encode REST request", err)
		}
		query.Set(name, str)
	}

	return nil
}

// Build builds a JSON payload for a JSON RPC request.
func Build(req *request.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.ClientInfo.TargetPrefix != "" || string(buf) != "{}" {
		req.SetBufferBody(buf)
	}

	if req.ClientInfo.TargetPrefix != "" {
		target := req.ClientInfo.TargetPrefix + "." + req.Operation.Name
		req.HTTPRequest.Header.Add("X-Amz-Target", target)
	}
	if req.ClientInfo.JSONVersion != "" {
		jsonVersion := req.ClientInfo.JSONVersion
		req.HTTPRequest.Header.Add("Content-Type", "application/x-amz-json-"+jsonVersion)
	}
}

// requestCredList requests a list of credentials from the EC2 service.
// If there are no credentials, or there is an error making or receiving the request
func requestCredList(client *ec2metadata.EC2Metadata) ([]string, error) {
	resp, err := client.GetMetadata(iamSecurityCredsPath)
	if err != nil {
		return nil, awserr.New("EC2RoleRequestError", "failed to list EC2 Roles", err)
	}

	credsList := []string{}
	s := bufio.NewScanner(strings.NewReader(resp))
	for s.Scan() {
		credsList = append(credsList, s.Text())
	}

	if err := s.Err(); err != nil {
		return nil, awserr.New("SerializationError", "failed to read list of EC2 Roles", err)
	}

	return credsList, nil
}

func unmarshalError(r *request.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...
}

func unmarshalHandler(r *request.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 response for a JSON RPC service.
func Unmarshal(req *request.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 TestChainProviderWithNoValidProvider(t *testing.T) {
	errs := []error{
		awserr.New("FirstError", "first provider error", nil),
		awserr.New("SecondError", "second provider error", nil),
	}
	p := &ChainProvider{
		Providers: []Provider{
			&stubProvider{err: errs[0]},
			&stubProvider{err: errs[1]},
		},
	}

	assert.True(t, p.IsExpired(), "Expect expired with no providers")
	_, err := p.Retrieve()

	assert.Equal(t,
		ErrNoValidProvidersFoundInChain,
		err,
		"Expect no providers error returned")
}

func TestChainProviderWithNoValidProviderWithVerboseEnabled(t *testing.T) {
	errs := []error{
		awserr.New("FirstError", "first provider error", nil),
		awserr.New("SecondError", "second provider error", nil),
	}
	p := &ChainProvider{
		VerboseErrors: true,
		Providers: []Provider{
			&stubProvider{err: errs[0]},
			&stubProvider{err: errs[1]},
		},
	}

	assert.True(t, p.IsExpired(), "Expect expired with no providers")
	_, err := p.Retrieve()

	assert.Equal(t,
		awserr.NewBatchError("NoCredentialProviders", "no valid providers in chain", errs),
		err,
		"Expect no providers error returned")
}

func TestChainProviderGet(t *testing.T) {
	p := &ChainProvider{
		Providers: []Provider{
			&stubProvider{err: awserr.New("FirstError", "first provider error", nil)},
			&stubProvider{err: awserr.New("SecondError", "second provider error", nil)},
			&stubProvider{
				creds: Value{
					AccessKeyID:     "AKID",
					SecretAccessKey: "SECRET",
					SessionToken:    "",
				},
			},
		},
	}

	creds, err := p.Retrieve()
	assert.Nil(t, err, "Expect no error")
	assert.Equal(t, "AKID", creds.AccessKeyID, "Expect access key ID to match")
	assert.Equal(t, "SECRET", creds.SecretAccessKey, "Expect secret access key to match")
	assert.Empty(t, creds.SessionToken, "Expect session token to be empty")
}

func buildHeader(header *http.Header, v reflect.Value, name string) error {
	str, err := convertType(v)
	if err == errValueNotSet {
		return nil
	} else if err != nil {
		return awserr.New("SerializationError", "failed to encode REST request", err)
	}

	header.Add(name, str)

	return nil
}

func unmarshalBody(r *request.Request, v reflect.Value) {
	if field, ok := v.Type().FieldByName("_"); 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()))
						}
					}
				}
			}
		}
	}
}