Esempio n. 1
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func unmarshalError(req *Request) {
	bodyBytes, err := ioutil.ReadAll(req.HTTPResponse.Body)
	if err != nil {
		req.Error = apierr.New("UnmarshaleError", req.HTTPResponse.Status, err)
		return
	}
	if len(bodyBytes) == 0 {
		req.Error = apierr.NewRequestError(
			apierr.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 = apierr.New("UnmarshaleError", "JSON unmarshal", err)
		return
	}
	req.Error = apierr.NewRequestError(
		apierr.New(jsonErr.Code, jsonErr.Message, nil),
		req.HTTPResponse.StatusCode,
		"",
	)
}
func TestAfterRetryRefreshCreds(t *testing.T) {
	os.Clearenv()
	credProvider := &mockCredsProvider{}
	svc := NewService(&Config{Credentials: credentials.NewCredentials(credProvider), MaxRetries: 1})

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

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

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

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

	_, err := svc.Config.Credentials.Get()
	assert.NoError(t, err)
	assert.True(t, credProvider.retreiveCalled)
}
Esempio n. 3
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func unmarshalError(r *aws.Request) {
	defer r.HTTPResponse.Body.Close()

	if r.HTTPResponse.ContentLength == int64(0) {
		// No body, use status code to generate an awserr.Error
		r.Error = apierr.NewRequestError(
			apierr.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 = apierr.New("Unmarshal", "failed to decode S3 XML error response", nil)
	} else {
		r.Error = apierr.NewRequestError(
			apierr.New(resp.Code, resp.Message, nil),
			r.HTTPResponse.StatusCode,
			"",
		)
	}
}
Esempio n. 4
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func TestChainProviderWithNoValidProvider(t *testing.T) {
	p := &ChainProvider{
		Providers: []Provider{
			&stubProvider{err: apierr.New("FirstError", "first provider error", nil)},
			&stubProvider{err: apierr.New("SecondError", "second provider error", nil)},
		},
	}

	assert.True(t, p.IsExpired(), "Expect expired with no providers")
	_, err := p.Retrieve()
	assert.Equal(t, ErrNoValidProvidersFoundInChain, err, "Expect no providers error returned")
}
Esempio n. 5
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// UnmarshalError unmarshals an error response for an AWS Query service.
func UnmarshalError(r *aws.Request) {
	defer r.HTTPResponse.Body.Close()

	resp := &xmlErrorResponse{}
	err := xml.NewDecoder(r.HTTPResponse.Body).Decode(resp)
	if err != nil && err != io.EOF {
		r.Error = apierr.New("Unmarshal", "failed to decode query XML error response", err)
	} else {
		r.Error = apierr.NewRequestError(
			apierr.New(resp.Code, resp.Message, nil),
			r.HTTPResponse.StatusCode,
			resp.RequestID,
		)
	}
}
Esempio n. 6
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// SendHandler is a request handler to send service request using HTTP client.
func SendHandler(r *Request) {
	var err error
	r.HTTPResponse, err = r.Service.Config.HTTPClient.Do(r.HTTPRequest)
	if err != nil {
		// Capture the case where url.Error is returned for error processing
		// response. e.g. 301 without location header comes back as string
		// error and r.HTTPResponse is nil. Other url redirect errors will
		// comeback in a similar method.
		if e, ok := err.(*url.Error); ok {
			if s := reStatusCode.FindStringSubmatch(e.Error()); s != nil {
				code, _ := strconv.ParseInt(s[1], 10, 64)
				r.HTTPResponse = &http.Response{
					StatusCode: int(code),
					Status:     http.StatusText(int(code)),
					Body:       ioutil.NopCloser(bytes.NewReader([]byte{})),
				}
				return
			}
		}
		if r.HTTPRequest == nil {
			// Add a dummy request response object to ensure the HTTPResponse
			// value is consistent.
			r.HTTPResponse = &http.Response{
				StatusCode: int(0),
				Status:     http.StatusText(int(0)),
				Body:       ioutil.NopCloser(bytes.NewReader([]byte{})),
			}
		}
		// Catch all other request errors.
		r.Error = apierr.New("RequestError", "send request failed", err)
		r.Retryable.Set(true) // network errors are retryable
	}
}
Esempio n. 7
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// Retrieve retrieves credentials from the EC2 service.
// Error will be returned if the request fails, or unable to extract
// the desired credentials.
func (m *EC2RoleProvider) Retrieve() (Value, error) {
	if m.Client == nil {
		m.Client = http.DefaultClient
	}
	if m.Endpoint == "" {
		m.Endpoint = metadataCredentialsEndpoint
	}

	credsList, err := requestCredList(m.Client, m.Endpoint)
	if err != nil {
		return Value{}, err
	}

	if len(credsList) == 0 {
		return Value{}, apierr.New("EmptyEC2RoleList", "empty EC2 Role list", nil)
	}
	credsName := credsList[0]

	roleCreds, err := requestCred(m.Client, m.Endpoint, credsName)
	if err != nil {
		return Value{}, err
	}

	m.expiresOn = roleCreds.Expiration
	if m.ExpiryWindow > 0 {
		// Offset based on expiry window if set.
		m.expiresOn = m.expiresOn.Add(-m.ExpiryWindow)
	}

	return Value{
		AccessKeyID:     roleCreds.AccessKeyID,
		SecretAccessKey: roleCreds.SecretAccessKey,
		SessionToken:    roleCreds.Token,
	}, nil
}
Esempio n. 8
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func buildQueryString(r *aws.Request, v reflect.Value, name string, query url.Values) {
	str, err := convertType(v)
	if err != nil {
		r.Error = apierr.New("Marshal", "failed to encode REST request", err)
	} else if str != nil {
		query.Set(name, *str)
	}
}
Esempio n. 9
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func buildHeader(r *aws.Request, v reflect.Value, name string) {
	str, err := convertType(v)
	if err != nil {
		r.Error = apierr.New("Marshal", "failed to encode REST request", err)
	} else if str != nil {
		r.HTTPRequest.Header.Add(name, *str)
	}
}
Esempio n. 10
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// requestCred requests the credentials for a specific credentials from the EC2 service.
//
// If the credentials cannot be found, or there is an error reading the response
// and error will be returned.
func requestCred(client *http.Client, endpoint, credsName string) (*ec2RoleCredRespBody, error) {
	resp, err := client.Get(endpoint + credsName)
	if err != nil {
		return nil, apierr.New("GetEC2RoleCredentials",
			fmt.Sprintf("failed to get %s EC2 Role credentials", credsName),
			err)
	}
	defer resp.Body.Close()

	respCreds := &ec2RoleCredRespBody{}
	if err := json.NewDecoder(resp.Body).Decode(respCreds); err != nil {
		return nil, apierr.New("DecodeEC2RoleCredentials",
			fmt.Sprintf("failed to decode %s EC2 Role credentials", credsName),
			err)
	}

	return respCreds, nil
}
Esempio n. 11
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// 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 *http.Client, endpoint string) ([]string, error) {
	resp, err := client.Get(endpoint)
	if err != nil {
		return nil, apierr.New("ListEC2Role", "failed to list EC2 Roles", err)
	}
	defer resp.Body.Close()

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

	if err := s.Err(); err != nil {
		return nil, apierr.New("ReadEC2Role", "failed to read list of EC2 Roles", err)
	}

	return credsList, nil
}
Esempio n. 12
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// internal logic for deciding whether to upload a single part or use a
// multipart upload.
func (u *uploader) upload() (*UploadOutput, error) {
	u.init()

	if u.opts.PartSize < MinUploadPartSize {
		msg := fmt.Sprintf("part size must be at least %d bytes", MinUploadPartSize)
		return nil, apierr.New("ConfigError", msg, nil)
	}

	// Do one read to determine if we have more than one part
	buf, err := u.nextReader()
	if err == io.EOF || err == io.ErrUnexpectedEOF { // single part
		return u.singlePart(buf)
	} else if err != nil {
		return nil, apierr.New("ReadRequestBody", "read upload data failed", err)
	}

	mu := multiuploader{uploader: u}
	return mu.upload(buf)
}
Esempio n. 13
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func buildHeaderMap(r *aws.Request, v reflect.Value, prefix string) {
	for _, key := range v.MapKeys() {
		str, err := convertType(v.MapIndex(key))
		if err != nil {
			r.Error = apierr.New("Marshal", "failed to encode REST request", err)
		} else if str != nil {
			r.HTTPRequest.Header.Add(prefix+key.String(), *str)
		}
	}
}
Esempio n. 14
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// Unmarshal unmarshals a response for an AWS Query service.
func Unmarshal(r *aws.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 = apierr.New("Unmarshal", "failed decoding Query response", err)
			return
		}
	}
}
Esempio n. 15
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func buildURI(r *aws.Request, v reflect.Value, name string) {
	value, err := convertType(v)
	if err != nil {
		r.Error = apierr.New("Marshal", "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
	}
}
Esempio n. 16
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// ValidateParameters is a request handler to validate the input parameters.
// Validating parameters only has meaning if done prior to the request being sent.
func ValidateParameters(r *Request) {
	if r.ParamsFilled() {
		v := validator{errors: []string{}}
		v.validateAny(reflect.ValueOf(r.Params), "")

		if count := len(v.errors); count > 0 {
			format := "%d validation errors:\n- %s"
			msg := fmt.Sprintf(format, count, strings.Join(v.errors, "\n- "))
			r.Error = apierr.New("InvalidParameter", msg, nil)
		}
	}
}
Esempio n. 17
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func TestChainProviderGet(t *testing.T) {
	p := &ChainProvider{
		Providers: []Provider{
			&stubProvider{err: apierr.New("FirstError", "first provider error", nil)},
			&stubProvider{err: apierr.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")
}
Esempio n. 18
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func unmarshalBody(r *aws.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 = apierr.New("Unmarshal", "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 = apierr.New("Unmarshal", "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 = apierr.New("Unmarshal",
								"failed to decode REST response",
								fmt.Errorf("unknown payload type %s", payload.Type()))
						}
					}
				}
			}
		}
	}
}
Esempio n. 19
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// contentMD5 computes and sets the HTTP Content-MD5 header for requests that
// require it.
func contentMD5(r *aws.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 = apierr.New("ContentMD5", "failed to read body", err)
		return
	}
	_, err = r.Body.Seek(0, 0)
	if err != nil {
		r.Error = apierr.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))
}
Esempio n. 20
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func unmarshalLocationElements(r *aws.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 = apierr.New("Unmarshal", "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 = apierr.New("Unmarshal", "failed to decode REST response", err)
					break
				}
			}
		}
		if r.Error != nil {
			return
		}
	}
}
Esempio n. 21
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func buildGetBucketLocation(r *aws.Request) {
	if r.DataFilled() {
		out := r.Data.(*GetBucketLocationOutput)
		b, err := ioutil.ReadAll(r.HTTPResponse.Body)
		if err != nil {
			r.Error = apierr.New("Unmarshal", "failed reading response body", err)
			return
		}

		match := reBucketLocation.FindSubmatch(b)
		if len(match) > 1 {
			loc := string(match[1])
			out.LocationConstraint = &loc
		}
	}
}
Esempio n. 22
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// Build builds a request for an AWS Query service.
func Build(r *aws.Request) {
	body := url.Values{
		"Action":  {r.Operation.Name},
		"Version": {r.Service.APIVersion},
	}
	if err := queryutil.Parse(body, r.Params, false); err != nil {
		r.Error = apierr.New("Marshal", "failed encoding Query request", err)
		return
	}

	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()
	}
}
Esempio n. 23
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func buildBody(r *aws.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 = apierr.New("Marshal",
							"failed to encode REST request",
							fmt.Errorf("unknown payload type %s", payload.Type()))
					}
				}
			}
		}
	}
}
Esempio n. 24
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package credentials

import (
	"os"

	"github.com/convox/cli/Godeps/_workspace/src/github.com/aws/aws-sdk-go/internal/apierr"
)

var (
	// ErrAccessKeyIDNotFound is returned when the AWS Access Key ID can't be
	// found in the process's environment.
	ErrAccessKeyIDNotFound = apierr.New("EnvAccessKeyNotFound", "AWS_ACCESS_KEY_ID or AWS_ACCESS_KEY not found in environment", nil)
	// ErrSecretAccessKeyNotFound is returned when the AWS Secret Access Key
	// can't be found in the process's environment.
	ErrSecretAccessKeyNotFound = apierr.New("EnvSecretNotFound", "AWS_SECRET_ACCESS_KEY or AWS_SECRET_KEY not found in environment", nil)
)

// A EnvProvider retrieves credentials from the environment variables of the
// running process. Environment credentials never expire.
//
// Environment variables used:
// - Access Key ID:     AWS_ACCESS_KEY_ID or AWS_ACCESS_KEY
// - Secret Access Key: AWS_SECRET_ACCESS_KEY or AWS_SECRET_KEY
type EnvProvider struct {
	retrieved bool
}

// NewEnvCredentials returns a pointer to a new Credentials object
// wrapping the environment variable provider.
func NewEnvCredentials() *Credentials {
	return NewCredentials(&EnvProvider{})
Esempio n. 25
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// upload will perform a multipart upload using the firstBuf buffer containing
// the first chunk of data.
func (u *multiuploader) upload(firstBuf io.ReadSeeker) (*UploadOutput, error) {
	params := &s3.CreateMultipartUploadInput{}
	awsutil.Copy(params, u.in)

	// Create the multipart
	resp, err := u.opts.S3.CreateMultipartUpload(params)
	if err != nil {
		return nil, err
	}
	u.uploadID = *resp.UploadID

	// Create the workers
	ch := make(chan chunk, u.opts.Concurrency)
	for i := 0; i < u.opts.Concurrency; i++ {
		u.wg.Add(1)
		go u.readChunk(ch)
	}

	// Send part 1 to the workers
	var num int64 = 1
	ch <- chunk{buf: firstBuf, num: num}

	// Read and queue the rest of the parts
	for u.geterr() == nil {
		// This upload exceeded maximum number of supported parts, error now.
		if num > int64(MaxUploadParts) {
			msg := fmt.Sprintf("exceeded total allowed parts (%d). "+
				"Adjust PartSize to fit in this limit", MaxUploadParts)
			u.seterr(apierr.New("TotalPartsExceeded", msg, nil))
			break
		}

		num++

		buf, err := u.nextReader()
		if err == io.EOF {
			break
		}

		ch <- chunk{buf: buf, num: num}

		if err != nil && err != io.ErrUnexpectedEOF {
			u.seterr(apierr.New("ReadRequestBody", "read multipart upload data failed", err))
			break
		}
	}

	// Close the channel, wait for workers, and complete upload
	close(ch)
	u.wg.Wait()
	complete := u.complete()

	if err := u.geterr(); err != nil {
		var berr *apierr.BaseError
		switch t := err.(type) {
		case *apierr.BaseError:
			berr = t
		default:
			berr = apierr.New("MultipartUpload", "upload multipart failed", err)
		}
		return nil, &multiUploadError{
			BaseError: berr,
			uploadID:  u.uploadID,
		}
	}
	return &UploadOutput{
		Location: *complete.Location,
		UploadID: u.uploadID,
	}, nil
}
Esempio n. 26
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package s3

import (
	"crypto/md5"
	"encoding/base64"

	"github.com/convox/cli/Godeps/_workspace/src/github.com/aws/aws-sdk-go/aws"
	"github.com/convox/cli/Godeps/_workspace/src/github.com/aws/aws-sdk-go/aws/awsutil"
	"github.com/convox/cli/Godeps/_workspace/src/github.com/aws/aws-sdk-go/internal/apierr"
)

var errSSERequiresSSL = apierr.New("ConfigError", "cannot send SSE keys over HTTP.", nil)

func validateSSERequiresSSL(r *aws.Request) {
	if r.HTTPRequest.URL.Scheme != "https" {
		p := awsutil.ValuesAtPath(r.Params, "SSECustomerKey||CopySourceSSECustomerKey")
		if len(p) > 0 {
			r.Error = errSSERequiresSSL
		}
	}
}

func computeSSEKeys(r *aws.Request) {
	headers := []string{
		"x-amz-server-side-encryption-customer-key",
		"x-amz-copy-source-server-side-encryption-customer-key",
	}

	for _, h := range headers {
		md5h := h + "-md5"
		if key := r.HTTPRequest.Header.Get(h); key != "" {
Esempio n. 27
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package credentials

import (
	"github.com/convox/cli/Godeps/_workspace/src/github.com/aws/aws-sdk-go/internal/apierr"
)

var (
	// ErrStaticCredentialsEmpty is emitted when static credentials are empty.
	ErrStaticCredentialsEmpty = apierr.New("EmptyStaticCreds", "static credentials are empty", nil)
)

// A StaticProvider is a set of credentials which are set pragmatically,
// and will never expire.
type StaticProvider struct {
	Value
}

// NewStaticCredentials returns a pointer to a new Credentials object
// wrapping a static credentials value provider.
func NewStaticCredentials(id, secret, token string) *Credentials {
	return NewCredentials(&StaticProvider{Value: Value{
		AccessKeyID:     id,
		SecretAccessKey: secret,
		SessionToken:    token,
	}})
}

// Retrieve returns the credentials or error if the credentials are invalid.
func (s *StaticProvider) Retrieve() (Value, error) {
	if s.AccessKeyID == "" || s.SecretAccessKey == "" {
		return Value{}, ErrStaticCredentialsEmpty
Esempio n. 28
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			if err, ok := r.Error.(awserr.Error); ok {
				if isCodeExpiredCreds(err.Code()) {
					r.Config.Credentials.Expire()
				}
			}
		}

		r.RetryCount++
		r.Error = nil
	}
}

var (
	// ErrMissingRegion is an error that is returned if region configuration is
	// not found.
	ErrMissingRegion error = apierr.New("MissingRegion", "could not find region configuration", nil)

	// ErrMissingEndpoint is an error that is returned if an endpoint cannot be
	// resolved for a service.
	ErrMissingEndpoint error = apierr.New("MissingEndpoint", "'Endpoint' configuration is required for this service", 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.
func ValidateEndpointHandler(r *Request) {
	if r.Service.SigningRegion == "" && r.Service.Config.Region == "" {
		r.Error = ErrMissingRegion
	} else if r.Service.Endpoint == "" {
		r.Error = ErrMissingEndpoint
	}
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// ValidateResponseHandler is a request handler to validate service response.
func ValidateResponseHandler(r *Request) {
	if r.HTTPResponse.StatusCode == 0 || r.HTTPResponse.StatusCode >= 300 {
		// this may be replaced by an UnmarshalError handler
		r.Error = apierr.New("UnknownError", "unknown error", nil)
	}
}
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func TestCredentialsGetWithError(t *testing.T) {
	c := NewCredentials(&stubProvider{err: apierr.New("provider error", "", nil), expired: true})

	_, err := c.Get()
	assert.Equal(t, "provider error", err.(awserr.Error).Code(), "Expected provider error")
}