runtime

package
v1.6.0 Latest Latest
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 Go to latest Published: May 4, 2023 License: MIT Imports: 38 Imported by: 899

Documentation

Overview

Package runtime contains various facilities for creating requests and handling responses. The content is intended for SDK authors.

Index

Examples

Constants

View Source 
const (
	// APIVersionLocationQueryParam indicates a query parameter
	APIVersionLocationQueryParam = 0
	// APIVersionLocationHeader indicates a header
	APIVersionLocationHeader = 1
)
View Source 
const (
	// FinalStateViaAzureAsyncOp indicates the final payload comes from the Azure-AsyncOperation URL.
	FinalStateViaAzureAsyncOp = pollers.FinalStateViaAzureAsyncOp

	// FinalStateViaLocation indicates the final payload comes from the Location URL.
	FinalStateViaLocation = pollers.FinalStateViaLocation

	// FinalStateViaOriginalURI indicates the final payload comes from the original URL.
	FinalStateViaOriginalURI = pollers.FinalStateViaOriginalURI

	// FinalStateViaOpLocation indicates the final payload comes from the Operation-Location URL.
	FinalStateViaOpLocation = pollers.FinalStateViaOpLocation
)

Variables

This section is empty.

Functions

func DecodeByteArray 

func DecodeByteArray(s string, v *[]byte, format Base64Encoding) error

DecodeByteArray will base-64 decode the provided string into v.

func Drain 

func Drain(resp *http.Response)

Drain reads the response body to completion then closes it. The bytes read are discarded.

func EncodeByteArray 

func EncodeByteArray(v []byte, format Base64Encoding) string

EncodeByteArray will base-64 encode the byte slice v.

func HasStatusCode 

func HasStatusCode(resp *http.Response, statusCodes ...int) bool

HasStatusCode returns true if the Response's status code is one of the specified values.

func JoinPaths 

func JoinPaths(root string, paths ...string) string

JoinPaths concatenates multiple URL path segments into one path, inserting path separation characters as required. JoinPaths will preserve query parameters in the root path

func MarshalAsByteArray 

func MarshalAsByteArray(req *policy.Request, v []byte, format Base64Encoding) error

MarshalAsByteArray will base-64 encode the byte slice v, then calls SetBody. The encoded value is treated as a JSON string.

func MarshalAsJSON 

func MarshalAsJSON(req *policy.Request, v interface{}) error

MarshalAsJSON calls json.Marshal() to get the JSON encoding of v then calls SetBody.

func MarshalAsXML 

func MarshalAsXML(req *policy.Request, v interface{}) error

MarshalAsXML calls xml.Marshal() to get the XML encoding of v then calls SetBody.

func NewLogPolicy 

func NewLogPolicy(o *policy.LogOptions) policy.Policy

NewLogPolicy creates a request/response logging policy object configured using the specified options. Pass nil to accept the default values; this is the same as passing a zero-value options.

func NewRequest 

func NewRequest(ctx context.Context, httpMethod string, endpoint string) (*policy.Request, error)

NewRequest creates a new policy.Request with the specified input. The endpoint MUST be properly encoded before calling this function.

func NewRequestIDPolicy added in v1.0.0 

func NewRequestIDPolicy() policy.Policy

NewRequestIDPolicy returns a policy that add the x-ms-client-request-id header

func NewResponseError 

func NewResponseError(resp *http.Response) error

NewResponseError creates an *azcore.ResponseError from the provided HTTP response. Call this when a service request returns a non-successful status code.

func NewRetryPolicy 

func NewRetryPolicy(o *policy.RetryOptions) policy.Policy

NewRetryPolicy creates a policy object configured using the specified options. Pass nil to accept the default values; this is the same as passing a zero-value options.

func NewTelemetryPolicy 

func NewTelemetryPolicy(mod, ver string, o *policy.TelemetryOptions) policy.Policy

NewTelemetryPolicy creates a telemetry policy object that adds telemetry information to outgoing HTTP requests. The format is [<application_id> ]azsdk-go-<mod>/<ver> <platform_info>. Pass nil to accept the default values; this is the same as passing a zero-value options.

func Payload 

func Payload(resp *http.Response) ([]byte, error)

Payload reads and returns the response body or an error. On a successful read, the response body is cached. Subsequent reads will access the cached value.

func SetMultipartFormData 

func SetMultipartFormData(req *policy.Request, formData map[string]interface{}) error

SetMultipartFormData writes the specified keys/values as multi-part form fields with the specified value. File content must be specified as a ReadSeekCloser. All other values are treated as string values.

func SkipBodyDownload added in v0.21.0 

func SkipBodyDownload(req *policy.Request)

SkipBodyDownload will disable automatic downloading of the response body.

func UnmarshalAsByteArray 

func UnmarshalAsByteArray(resp *http.Response, v *[]byte, format Base64Encoding) error

UnmarshalAsByteArray will base-64 decode the received payload and place the result into the value pointed to by v.

func UnmarshalAsJSON 

func UnmarshalAsJSON(resp *http.Response, v interface{}) error

UnmarshalAsJSON calls json.Unmarshal() to unmarshal the received payload into the value pointed to by v.

func UnmarshalAsXML 

func UnmarshalAsXML(resp *http.Response, v interface{}) error

UnmarshalAsXML calls xml.Unmarshal() to unmarshal the received payload into the value pointed to by v.

func WithCaptureResponse added in v0.22.0 

func WithCaptureResponse(parent context.Context, resp **http.Response) context.Context

WithCaptureResponse applies the HTTP response retrieval annotation to the parent context. The resp parameter will contain the HTTP response after the request has completed.

Example 
var respFromCtx *http.Response
WithCaptureResponse(context.Background(), &respFromCtx)

Output:

func WithHTTPHeader added in v0.22.0 

func WithHTTPHeader(parent context.Context, header http.Header) context.Context

WithHTTPHeader adds the specified http.Header to the parent context. Use this to specify custom HTTP headers at the API-call level. Any overlapping headers will have their values replaced with the values specified here.

func WithRetryOptions added in v0.22.0 

func WithRetryOptions(parent context.Context, options policy.RetryOptions) context.Context

WithRetryOptions adds the specified RetryOptions to the parent context. Use this to specify custom RetryOptions at the API-call level.

Types

type APIVersionLocation added in v1.2.0 

type APIVersionLocation int

APIVersionLocation indicates which part of a request identifies the service version

type APIVersionOptions added in v1.2.0 

type APIVersionOptions struct {
	// Location indicates where to set the version on a request, for example in a header or query param
	Location APIVersionLocation
	// Name is the name of the header or query parameter, for example "api-version"
	Name string
}

APIVersionOptions contains options for API versions

type Base64Encoding 

type Base64Encoding int

Base64Encoding is usesd to specify which base-64 encoder/decoder to use when encoding/decoding a slice of bytes to/from a string. 

const (
	// Base64StdFormat uses base64.StdEncoding for encoding and decoding payloads.
	Base64StdFormat Base64Encoding = 0

	// Base64URLFormat uses base64.RawURLEncoding for encoding and decoding payloads.
	Base64URLFormat Base64Encoding = 1
)

type BearerTokenPolicy added in v0.20.0 

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

BearerTokenPolicy authorizes requests with bearer tokens acquired from a TokenCredential.

func NewBearerTokenPolicy added in v0.20.0 

func NewBearerTokenPolicy(cred exported.TokenCredential, scopes []string, opts *policy.BearerTokenOptions) *BearerTokenPolicy

NewBearerTokenPolicy creates a policy object that authorizes requests with bearer tokens. cred: an azcore.TokenCredential implementation such as a credential object from azidentity scopes: the list of permission scopes required for the token. opts: optional settings. Pass nil to accept default values; this is the same as passing a zero-value options.

func (*BearerTokenPolicy) Do added in v0.20.0 

func (b *BearerTokenPolicy) Do(req *policy.Request) (*http.Response, error)

Do authorizes a request with a bearer token

type FinalStateVia added in v0.23.0 

type FinalStateVia = pollers.FinalStateVia

FinalStateVia is the enumerated type for the possible final-state-via values.

type NewPollerFromResumeTokenOptions added in v0.23.0 

type NewPollerFromResumeTokenOptions[T any] struct {
	// Response contains a preconstructed response type.
	// The final payload will be unmarshaled into it and returned.
	Response *T

	// Handler[T] contains a custom polling implementation.
	Handler PollingHandler[T]
}

NewPollerFromResumeTokenOptions contains the optional parameters for NewPollerFromResumeToken.

type NewPollerOptions added in v0.23.0 

type NewPollerOptions[T any] struct {
	// FinalStateVia contains the final-state-via value for the LRO.
	FinalStateVia FinalStateVia

	// Response contains a preconstructed response type.
	// The final payload will be unmarshaled into it and returned.
	Response *T

	// Handler[T] contains a custom polling implementation.
	Handler PollingHandler[T]
}

NewPollerOptions contains the optional parameters for NewPoller.

type Pager added in v0.23.0 

type Pager[T any] struct {
	// contains filtered or unexported fields
}

Pager provides operations for iterating over paged responses.

func NewPager added in v0.23.0 

func NewPager[T any](handler PagingHandler[T]) *Pager[T]

NewPager creates an instance of Pager using the specified PagingHandler. Pass a non-nil T for firstPage if the first page has already been retrieved.

func (*Pager[T]) More added in v0.23.0 

func (p *Pager[T]) More() bool

More returns true if there are more pages to retrieve.

func (*Pager[T]) NextPage added in v0.23.0 

func (p *Pager[T]) NextPage(ctx context.Context) (T, error)

NextPage advances the pager to the next page.

func (*Pager[T]) UnmarshalJSON added in v0.23.0 

func (p *Pager[T]) UnmarshalJSON(data []byte) error

UnmarshalJSON implements the json.Unmarshaler interface for Pager[T].

type PagingHandler added in v1.0.0 

type PagingHandler[T any] struct {
	// More returns a boolean indicating if there are more pages to fetch.
	// It uses the provided page to make the determination.
	More func(T) bool

	// Fetcher fetches the first and subsequent pages.
	Fetcher func(context.Context, *T) (T, error)
}

PagingHandler contains the required data for constructing a Pager.

type Pipeline 

type Pipeline = exported.Pipeline

Pipeline represents a primitive for sending HTTP requests and receiving responses. Its behavior can be extended by specifying policies during construction.

func NewPipeline 

func NewPipeline(module, version string, plOpts PipelineOptions, options *policy.ClientOptions) Pipeline

NewPipeline creates a pipeline from connection options, with any additional policies as specified. Policies from ClientOptions are placed after policies from PipelineOptions. The module and version parameters are used by the telemetry policy, when enabled.

type PipelineOptions added in v0.21.0 

type PipelineOptions struct {
	AllowedHeaders, AllowedQueryParameters []string
	APIVersion                             APIVersionOptions
	PerCall, PerRetry                      []policy.Policy
}

PipelineOptions contains Pipeline options for SDK developers

type PollUntilDoneOptions added in v1.0.0 

type PollUntilDoneOptions struct {
	// Frequency is the time to wait between polling intervals in absence of a Retry-After header. Allowed minimum is one second.
	// Pass zero to accept the default value (30s).
	Frequency time.Duration
}

PollUntilDoneOptions contains the optional values for the Poller[T].PollUntilDone() method.

type Poller added in v0.23.0 

type Poller[T any] struct {
	// contains filtered or unexported fields
}

Poller encapsulates a long-running operation, providing polling facilities until the operation reaches a terminal state.

func NewPoller 

func NewPoller[T any](resp *http.Response, pl exported.Pipeline, options *NewPollerOptions[T]) (*Poller[T], error)

NewPoller creates a Poller based on the provided initial response.

func NewPollerFromResumeToken 

func NewPollerFromResumeToken[T any](token string, pl exported.Pipeline, options *NewPollerFromResumeTokenOptions[T]) (*Poller[T], error)

NewPollerFromResumeToken creates a Poller from a resume token string.

func (*Poller[T]) Done added in v0.23.0 

func (p *Poller[T]) Done() bool

Done returns true if the LRO has reached a terminal state. Once a terminal state is reached, call Result().

func (*Poller[T]) Poll added in v0.23.0 

func (p *Poller[T]) Poll(ctx context.Context) (*http.Response, error)

Poll fetches the latest state of the LRO. It returns an HTTP response or error. If Poll succeeds, the poller's state is updated and the HTTP response is returned. If Poll fails, the poller's state is unmodified and the error is returned. Calling Poll on an LRO that has reached a terminal state will return the last HTTP response.

func (*Poller[T]) PollUntilDone added in v0.23.0 

func (p *Poller[T]) PollUntilDone(ctx context.Context, options *PollUntilDoneOptions) (T, error)

PollUntilDone will poll the service endpoint until a terminal state is reached, an error is received, or the context expires. It internally uses Poll(), Done(), and Result() in its polling loop, sleeping for the specified duration between intervals. options: pass nil to accept the default values. NOTE: the default polling frequency is 30 seconds which works well for most operations. However, some operations might benefit from a shorter or longer duration.

func (*Poller[T]) Result added in v0.23.0 

func (p *Poller[T]) Result(ctx context.Context) (T, error)

Result returns the result of the LRO and is meant to be used in conjunction with Poll and Done. If the LRO completed successfully, a populated instance of T is returned. If the LRO failed or was canceled, an *azcore.ResponseError error is returned. Calling this on an LRO in a non-terminal state will return an error.

func (*Poller[T]) ResumeToken added in v0.23.0 

func (p *Poller[T]) ResumeToken() (string, error)

ResumeToken returns a value representing the poller that can be used to resume the LRO at a later time. ResumeTokens are unique per service operation. The token's format should be considered opaque and is subject to change. Calling this on an LRO in a terminal state will return an error.

type PollingHandler added in v1.0.0 

type PollingHandler[T any] interface {
	// Done returns true if the LRO has reached a terminal state.
	Done() bool

	// Poll fetches the latest state of the LRO.
	Poll(context.Context) (*http.Response, error)

	// Result is called once the LRO has reached a terminal state. It populates the out parameter
	// with the result of the operation.
	Result(ctx context.Context, out *T) error
}

PollingHandler[T] abstracts the differences among poller implementations.

Source Files

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