bce

package
v0.9.7 Latest Latest
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 Go to latest Published: Mar 18, 2020 License: Apache-2.0 Imports: 16 Imported by: 115

Documentation

Overview

Package bce implements the infrastructure to access BCE services.

  • BceClient: It is the general client of BCE to access all services. It builds http request to access the services based on the given client configuration.
  • BceClientConfiguration: The client configuration data structure which contains endpoint, region, credentials, retry policy, sign options and so on. It supports most of the default value and user can also access or change the default with its public fields' name.
  • Error types: The error types when making request or receiving response to the BCE services contains two types: the BceClientError when making request to BCE services and the BceServiceError when recieving response from them.
  • BceRequest: The request instance stands for an request to access the BCE services.
  • BceResponse: The response instance stands for an response from the BCE services.

Index

Constants

View Source 
const (
	SDK_VERSION                          = "0.9.6"
	URI_PREFIX                           = "/" // now support uri without prefix "v1" so just set root path
	DEFAULT_DOMAIN                       = "baidubce.com"
	DEFAULT_PROTOCOL                     = "http"
	DEFAULT_REGION                       = "bj"
	DEFAULT_CONTENT_TYPE                 = "application/json;charset=utf-8"
	DEFAULT_CONNECTION_TIMEOUT_IN_MILLIS = 1200 * 1000
)

Constants and default values for the package bce

View Source 
const (
	EACCESS_DENIED            = "AccessDenied"
	EINAPPROPRIATE_JSON       = "InappropriateJSON"
	EINTERNAL_ERROR           = "InternalError"
	EINVALID_ACCESS_KEY_ID    = "InvalidAccessKeyId"
	EINVALID_HTTP_AUTH_HEADER = "InvalidHTTPAuthHeader"
	EINVALID_HTTP_REQUEST     = "InvalidHTTPRequest"
	EINVALID_URI              = "InvalidURI"
	EMALFORMED_JSON           = "MalformedJSON"
	EINVALID_VERSION          = "InvalidVersion"
	EOPT_IN_REQUIRED          = "OptInRequired"
	EPRECONDITION_FAILED      = "PreconditionFailed"
	EREQUEST_EXPIRED          = "RequestExpired"
	ESIGNATURE_DOES_NOT_MATCH = "SignatureDoesNotMatch"
)

Variables

View Source 
var (
	DEFAULT_USER_AGENT   string
	DEFAULT_RETRY_POLICY = NewBackOffRetryPolicy(3, 20000, 300)
)

Functions

This section is empty.

Types

type BackOffRetryPolicy 

type BackOffRetryPolicy struct {
	// contains filtered or unexported fields
}

BackOffRetryPolicy implements a policy that retries with exponential back-off strategy. This policy will keep retrying until the maximum number of retries is reached. The delay time will be a fixed interval for the first time then 2 * interval for the second, 4 * internal for the third, and so on. In general, the delay time will be 2^number_of_retries_attempted*interval. When a maximum of delay time is specified, the delay time will never exceed this limit.

func NewBackOffRetryPolicy 

func NewBackOffRetryPolicy(maxRetry int, maxDelay, base int64) *BackOffRetryPolicy

func (*BackOffRetryPolicy) GetDelayBeforeNextRetryInMillis 

func (b *BackOffRetryPolicy) GetDelayBeforeNextRetryInMillis(
	err BceError, attempts int) time.Duration

func (*BackOffRetryPolicy) ShouldRetry 

func (b *BackOffRetryPolicy) ShouldRetry(err BceError, attempts int) bool

type BceClient 

type BceClient struct {
	Config *BceClientConfiguration
	Signer auth.Signer // the sign algorithm
}

BceClient defines the general client to access the BCE services.

func NewBceClient 

func NewBceClient(conf *BceClientConfiguration, sign auth.Signer) *BceClient

func NewBceClientWithAkSk 

func NewBceClientWithAkSk(ak, sk, endPoint string) (*BceClient, error)

func (*BceClient) SendRequest 

func (c *BceClient) SendRequest(req *BceRequest, resp *BceResponse) error

SendRequest - the client performs sending the http request with retry policy and receive the response from the BCE services.

PARAMS:

  • req: the request object to be sent to the BCE service
  • resp: the response object to receive the content from BCE service

RETURNS:

  • error: nil if ok otherwise the specific error

type BceClientConfiguration 

type BceClientConfiguration struct {
	Endpoint                  string
	ProxyUrl                  string
	Region                    string
	UserAgent                 string
	Credentials               *auth.BceCredentials
	SignOption                *auth.SignOptions
	Retry                     RetryPolicy
	ConnectionTimeoutInMillis int
}

BceClientConfiguration defines the config components structure.

func (*BceClientConfiguration) String 

func (c *BceClientConfiguration) String() string

type BceClientError 

type BceClientError struct{ Message string }

BceClientError defines the error struct for the client when making request

func NewBceClientError 

func NewBceClientError(msg string) *BceClientError

func (*BceClientError) Error 

func (b *BceClientError) Error() string

type BceError 

type BceError interface {
	error
}

BceError abstracts the error for BCE

type BceRequest 

type BceRequest struct {
	http.Request
	// contains filtered or unexported fields
}

BceRequest defines the request structure for accessing BCE services

func (*BceRequest) BuildHttpRequest 

func (b *BceRequest) BuildHttpRequest()

func (*BceRequest) ClientError 

func (b *BceRequest) ClientError() *BceClientError

func (*BceRequest) RequestId 

func (b *BceRequest) RequestId() string

func (*BceRequest) SetBody 

func (b *BceRequest) SetBody(body *Body)

func (*BceRequest) SetClientError 

func (b *BceRequest) SetClientError(err *BceClientError)

func (*BceRequest) SetRequestId 

func (b *BceRequest) SetRequestId(val string)

func (*BceRequest) String 

func (b *BceRequest) String() string

type BceResponse 

type BceResponse struct {
	// contains filtered or unexported fields
}

BceResponse defines the response structure for receiving BCE services response.

func (*BceResponse) Body 

func (r *BceResponse) Body() io.ReadCloser

func (*BceResponse) DebugId 

func (r *BceResponse) DebugId() string

func (*BceResponse) ElapsedTime 

func (r *BceResponse) ElapsedTime() time.Duration

func (*BceResponse) Header 

func (r *BceResponse) Header(key string) string

func (*BceResponse) Headers 

func (r *BceResponse) Headers() map[string]string

func (*BceResponse) IsFail 

func (r *BceResponse) IsFail() bool

func (*BceResponse) ParseJsonBody 

func (r *BceResponse) ParseJsonBody(result interface{}) error

func (*BceResponse) ParseResponse 

func (r *BceResponse) ParseResponse()

func (*BceResponse) RequestId 

func (r *BceResponse) RequestId() string

func (*BceResponse) ServiceError 

func (r *BceResponse) ServiceError() *BceServiceError

func (*BceResponse) SetHttpResponse 

func (r *BceResponse) SetHttpResponse(response *http.Response)

func (*BceResponse) StatusCode 

func (r *BceResponse) StatusCode() int

func (*BceResponse) StatusText 

func (r *BceResponse) StatusText() string

type BceServiceError 

type BceServiceError struct {
	Code       string
	Message    string
	RequestId  string
	StatusCode int
}

BceServiceError defines the error struct for the BCE service when receiving response

func NewBceServiceError 

func NewBceServiceError(code, msg, reqId string, status int) *BceServiceError

func (*BceServiceError) Error 

func (b *BceServiceError) Error() string

type Body 

type Body struct {
	// contains filtered or unexported fields
}

Body defines the data structure used in BCE request. Every BCE request that sets the body field must set its content-length and content-md5 headers to ensure the correctness of the body content forcely, and users can also set the content-sha256 header to strengthen the correctness with the "SetHeader" method.

func NewBodyFromBytes 

func NewBodyFromBytes(stream []byte) (*Body, error)

NewBodyFromBytes - build a Body object from the byte stream to be used in the http request, it calculates the content-md5 of the byte stream and store the size as well as the stream.

PARAMS:

  • stream: byte stream

RETURNS:

  • *Body: the return Body object
  • error: error if any specific error occurs

func NewBodyFromFile 

func NewBodyFromFile(fname string) (*Body, error)

NewBodyFromFile - build a Body object from the given file name to be used in the http request, it calculates the content-md5 of the byte stream and store the size as well as the stream.

PARAMS:

  • fname: the given file name

RETURNS:

  • *Body: the return Body object
  • error: error if any specific error occurs

func NewBodyFromSectionFile 

func NewBodyFromSectionFile(file *os.File, off, size int64) (*Body, error)

NewBodyFromSectionFile - build a Body object from the given file pointer with offset and size. It calculates the content-md5 of the given content and store the size as well as the stream.

PARAMS:

  • file: the input file pointer
  • off: offset of current section body
  • size: current section body size

RETURNS:

  • *Body: the return Body object
  • error: error if any specific error occurs

func NewBodyFromSizedReader 

func NewBodyFromSizedReader(r io.Reader, size int64) (*Body, error)

NewBodyFromSizedReader - build a Body object from the given reader with size. It calculates the content-md5 of the given content and store the size as well as the stream.

PARAMS:

  • r: the input reader
  • size: the size to be read from the input reader which must be <= reader size

RETURNS:

  • *Body: the return Body object
  • error: error if any specific error occurs

func NewBodyFromString 

func NewBodyFromString(str string) (*Body, error)

NewBodyFromString - build a Body object from the string to be used in the http request, it calculates the content-md5 of the byte stream and store the size as well as the stream.

PARAMS:

  • str: the input string

RETURNS:

  • *Body: the return Body object
  • error: error if any specific error occurs

func (*Body) ContentMD5 

func (b *Body) ContentMD5() string

func (*Body) SetStream 

func (b *Body) SetStream(stream io.ReadCloser)

func (*Body) Size 

func (b *Body) Size() int64

func (*Body) Stream 

func (b *Body) Stream() io.ReadCloser

type Client 

type Client interface {
	SendRequest(*BceRequest, *BceResponse) error
}

Client is the general interface which can perform sending request. Different service will define its own client in case of specific extension.

type NoRetryPolicy 

type NoRetryPolicy struct{}

NoRetryPolicy just does not retry.

func NewNoRetryPolicy 

func NewNoRetryPolicy() *NoRetryPolicy

func (*NoRetryPolicy) GetDelayBeforeNextRetryInMillis 

func (_ *NoRetryPolicy) GetDelayBeforeNextRetryInMillis(
	err BceError, attempts int) time.Duration

func (*NoRetryPolicy) ShouldRetry 

func (_ *NoRetryPolicy) ShouldRetry(err BceError, attempts int) bool

type RequestBuilder 

type RequestBuilder struct {
	// contains filtered or unexported fields
}

RequestBuilder holds config data for bce request. Some of fields are required and the others are optional. The builder pattern can simplify the execution of requests.

func NewRequestBuilder 

func NewRequestBuilder(client Client) *RequestBuilder

create RequestBuilder with the client.

func (*RequestBuilder) Do 

func (b *RequestBuilder) Do() error

Do will send request to bce and get result with the builder's parameters.

func (*RequestBuilder) WithBody 

func (b *RequestBuilder) WithBody(body interface{}) *RequestBuilder

func (*RequestBuilder) WithHeader 

func (b *RequestBuilder) WithHeader(key, value string) *RequestBuilder

func (*RequestBuilder) WithHeaders 

func (b *RequestBuilder) WithHeaders(headers map[string]string) *RequestBuilder

func (*RequestBuilder) WithMethod 

func (b *RequestBuilder) WithMethod(method string) *RequestBuilder

func (*RequestBuilder) WithQueryParam 

func (b *RequestBuilder) WithQueryParam(key, value string) *RequestBuilder

set query param with the key/value directly.

func (*RequestBuilder) WithQueryParamFilter 

func (b *RequestBuilder) WithQueryParamFilter(key, value string) *RequestBuilder

set query param with the key/value only when the value is not blank.

func (*RequestBuilder) WithQueryParams 

func (b *RequestBuilder) WithQueryParams(params map[string]string) *RequestBuilder

func (*RequestBuilder) WithResult 

func (b *RequestBuilder) WithResult(result interface{}) *RequestBuilder

func (*RequestBuilder) WithURL 

func (b *RequestBuilder) WithURL(url string) *RequestBuilder

type RetryPolicy 

type RetryPolicy interface {
	ShouldRetry(BceError, int) bool
	GetDelayBeforeNextRetryInMillis(BceError, int) time.Duration
}

RetryPolicy defines the two methods to retry for sending request.

Source Files

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