request

package
v1.4.16-0...-c0d7d32 Latest Latest
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 Go to latest Published: Oct 7, 2016 License: Apache-2.0 Imports: 12 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	// InvalidParameterErrCode is the error code for invalid parameters errors
	InvalidParameterErrCode = "InvalidParameter"
	// ParamRequiredErrCode is the error code for required parameter errors
	ParamRequiredErrCode = "ParamRequiredError"
	// ParamMinValueErrCode is the error code for fields with too low of a
	// number value.
	ParamMinValueErrCode = "ParamMinValueError"
	// ParamMinLenErrCode is the error code for fields without enough elements.
	ParamMinLenErrCode = "ParamMinLenError"
)

Variables

This section is empty.

Functions

func AddToUserAgent 

func AddToUserAgent(r *Request, s string)

AddToUserAgent adds the string to the end of the request's current user agent.

func HandlerListLogItem 

func HandlerListLogItem(item HandlerListRunItem) bool

HandlerListLogItem logs the request handler and the state of the request's Error value. Always returns true to continue iterating request handlers in a HandlerList.

func HandlerListStopOnError 

func HandlerListStopOnError(item HandlerListRunItem) bool

HandlerListStopOnError returns false to stop the HandlerList iterating over request handlers if Request.Error is not nil. True otherwise to continue iterating.

func MakeAddToUserAgentFreeFormHandler 

func MakeAddToUserAgentFreeFormHandler(s string) func(*Request)

MakeAddToUserAgentFreeFormHandler adds the input to the User-Agent request header. The input string will be concatenated with the current request's user agent string.

func MakeAddToUserAgentHandler 

func MakeAddToUserAgentHandler(name, version string, extra ...string) func(*Request)

MakeAddToUserAgentHandler will add the name/version pair to the User-Agent request header. If the extra parameters are provided they will be added as metadata to the name/version pair resulting in the following format. "name/version (extra0; extra1; ...)" The user agent part will be concatenated with this current request's user agent string.

func WithRetryer 

func WithRetryer(cfg *aws.Config, retryer Retryer) *aws.Config

WithRetryer sets a config Retryer value to the given Config returning it for chaining.

Types

type ErrInvalidParam 

type ErrInvalidParam interface {
	awserr.Error

	// Field name the error occurred on.
	Field() string

	// SetContext updates the context of the error.
	SetContext(string)

	// AddNestedContext updates the error's context to include a nested level.
	AddNestedContext(string)
}

An ErrInvalidParam represents an invalid parameter error type.

type ErrInvalidParams 

type ErrInvalidParams struct {
	// Context is the base context of the invalid parameter group.
	Context string
	// contains filtered or unexported fields
}

An ErrInvalidParams provides wrapping of invalid parameter errors found when validating API operation input parameters.

func (*ErrInvalidParams) Add 

func (e *ErrInvalidParams) Add(err ErrInvalidParam)

Add adds a new invalid parameter error to the collection of invalid parameters. The context of the invalid parameter will be updated to reflect this collection.

func (*ErrInvalidParams) AddNested 

func (e *ErrInvalidParams) AddNested(nestedCtx string, nested ErrInvalidParams)

AddNested adds the invalid parameter errors from another ErrInvalidParams value into this collection. The nested errors will have their nested context updated and base context to reflect the merging.

Use for nested validations errors.

func (ErrInvalidParams) Code 

func (e ErrInvalidParams) Code() string

Code returns the code of the error

func (ErrInvalidParams) Error 

func (e ErrInvalidParams) Error() string

Error returns the string formatted form of the invalid parameters.

func (ErrInvalidParams) Len 

func (e ErrInvalidParams) Len() int

Len returns the number of invalid parameter errors

func (ErrInvalidParams) Message 

func (e ErrInvalidParams) Message() string

Message returns the message of the error

func (ErrInvalidParams) OrigErr 

func (e ErrInvalidParams) OrigErr() error

OrigErr returns the invalid parameters as a awserr.BatchedErrors value

func (ErrInvalidParams) OrigErrs 

func (e ErrInvalidParams) OrigErrs() []error

OrigErrs returns a slice of the invalid parameters

type ErrParamMinLen 

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

An ErrParamMinLen represents a minimum length parameter error.

func NewErrParamMinLen 

func NewErrParamMinLen(field string, min int) *ErrParamMinLen

NewErrParamMinLen creates a new minimum length parameter error.

func (*ErrParamMinLen) AddNestedContext 

func (e *ErrParamMinLen) AddNestedContext(ctx string)

AddNestedContext prepends a context to the field's path.

func (*ErrParamMinLen) Code 

func (e *ErrParamMinLen) Code() string

Code returns the error code for the type of invalid parameter.

func (*ErrParamMinLen) Error 

func (e *ErrParamMinLen) Error() string

Error returns the string version of the invalid parameter error.

func (*ErrParamMinLen) Field 

func (e *ErrParamMinLen) Field() string

Field Returns the field and context the error occurred.

func (*ErrParamMinLen) Message 

func (e *ErrParamMinLen) Message() string

Message returns the reason the parameter was invalid, and its context.

func (*ErrParamMinLen) MinLen 

func (e *ErrParamMinLen) MinLen() int

MinLen returns the field's required minimum length.

func (*ErrParamMinLen) OrigErr 

func (e *ErrParamMinLen) OrigErr() error

OrigErr returns nil, Implemented for awserr.Error interface.

func (*ErrParamMinLen) SetContext 

func (e *ErrParamMinLen) SetContext(ctx string)

SetContext updates the base context of the error.

type ErrParamMinValue 

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

An ErrParamMinValue represents a minimum value parameter error.

func NewErrParamMinValue 

func NewErrParamMinValue(field string, min float64) *ErrParamMinValue

NewErrParamMinValue creates a new minimum value parameter error.

func (*ErrParamMinValue) AddNestedContext 

func (e *ErrParamMinValue) AddNestedContext(ctx string)

AddNestedContext prepends a context to the field's path.

func (*ErrParamMinValue) Code 

func (e *ErrParamMinValue) Code() string

Code returns the error code for the type of invalid parameter.

func (*ErrParamMinValue) Error 

func (e *ErrParamMinValue) Error() string

Error returns the string version of the invalid parameter error.

func (*ErrParamMinValue) Field 

func (e *ErrParamMinValue) Field() string

Field Returns the field and context the error occurred.

func (*ErrParamMinValue) Message 

func (e *ErrParamMinValue) Message() string

Message returns the reason the parameter was invalid, and its context.

func (*ErrParamMinValue) MinValue 

func (e *ErrParamMinValue) MinValue() float64

MinValue returns the field's require minimum value.

float64 is returned for both int and float min values.

func (*ErrParamMinValue) OrigErr 

func (e *ErrParamMinValue) OrigErr() error

OrigErr returns nil, Implemented for awserr.Error interface.

func (*ErrParamMinValue) SetContext 

func (e *ErrParamMinValue) SetContext(ctx string)

SetContext updates the base context of the error.

type ErrParamRequired 

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

An ErrParamRequired represents an required parameter error.

func NewErrParamRequired 

func NewErrParamRequired(field string) *ErrParamRequired

NewErrParamRequired creates a new required parameter error.

func (*ErrParamRequired) AddNestedContext 

func (e *ErrParamRequired) AddNestedContext(ctx string)

AddNestedContext prepends a context to the field's path.

func (*ErrParamRequired) Code 

func (e *ErrParamRequired) Code() string

Code returns the error code for the type of invalid parameter.

func (*ErrParamRequired) Error 

func (e *ErrParamRequired) Error() string

Error returns the string version of the invalid parameter error.

func (*ErrParamRequired) Field 

func (e *ErrParamRequired) Field() string

Field Returns the field and context the error occurred.

func (*ErrParamRequired) Message 

func (e *ErrParamRequired) Message() string

Message returns the reason the parameter was invalid, and its context.

func (*ErrParamRequired) OrigErr 

func (e *ErrParamRequired) OrigErr() error

OrigErr returns nil, Implemented for awserr.Error interface.

func (*ErrParamRequired) SetContext 

func (e *ErrParamRequired) SetContext(ctx string)

SetContext updates the base context of the error.

type HandlerList 

type HandlerList struct {

	// Called after each request handler in the list is called. If set
	// and the func returns true the HandlerList will continue to iterate
	// over the request handlers. If false is returned the HandlerList
	// will stop iterating.
	//
	// Should be used if extra logic to be performed between each handler
	// in the list. This can be used to terminate a list's iteration
	// based on a condition such as error like, HandlerListStopOnError.
	// Or for logging like HandlerListLogItem.
	AfterEachFn func(item HandlerListRunItem) bool
	// contains filtered or unexported fields
}

A HandlerList manages zero or more handlers in a list.

func (*HandlerList) Clear 

func (l *HandlerList) Clear()

Clear clears the handler list.

func (*HandlerList) Len 

func (l *HandlerList) Len() int

Len returns the number of handlers in the list.

func (*HandlerList) PushBack 

func (l *HandlerList) PushBack(f func(*Request))

PushBack pushes handler f to the back of the handler list.

func (*HandlerList) PushBackNamed 

func (l *HandlerList) PushBackNamed(n NamedHandler)

PushBackNamed pushes named handler f to the back of the handler list.

func (*HandlerList) PushFront 

func (l *HandlerList) PushFront(f func(*Request))

PushFront pushes handler f to the front of the handler list.

func (*HandlerList) PushFrontNamed 

func (l *HandlerList) PushFrontNamed(n NamedHandler)

PushFrontNamed pushes named handler f to the front of the handler list.

func (*HandlerList) Remove 

func (l *HandlerList) Remove(n NamedHandler)

Remove removes a NamedHandler n

func (*HandlerList) Run 

func (l *HandlerList) Run(r *Request)

Run executes all handlers in the list with a given request object.

type HandlerListRunItem 

type HandlerListRunItem struct {
	Index   int
	Handler NamedHandler
	Request *Request
}

A HandlerListRunItem represents an entry in the HandlerList which is being run.

type Handlers 

type Handlers struct {
	Validate         HandlerList
	Build            HandlerList
	Sign             HandlerList
	Send             HandlerList
	ValidateResponse HandlerList
	Unmarshal        HandlerList
	UnmarshalMeta    HandlerList
	UnmarshalError   HandlerList
	Retry            HandlerList
	AfterRetry       HandlerList
}

A Handlers provides a collection of request handlers for various stages of handling requests.

func (*Handlers) Clear 

func (h *Handlers) Clear()

Clear removes callback functions for all handlers

func (*Handlers) Copy 

func (h *Handlers) Copy() Handlers

Copy returns of this handler's lists.

type NamedHandler 

type NamedHandler struct {
	Name string
	Fn   func(*Request)
}

A NamedHandler is a struct that contains a name and function callback.

type Operation 

type Operation struct {
	Name       string
	HTTPMethod string
	HTTPPath   string
	*Paginator
}

An Operation is the service API operation to be made.

type Paginator 

type Paginator struct {
	InputTokens     []string
	OutputTokens    []string
	LimitToken      string
	TruncationToken string
}

Paginator keeps track of pagination configuration for an API operation.

type Request 

type Request struct {
	Config     aws.Config
	ClientInfo metadata.ClientInfo
	Handlers   Handlers

	Retryer
	Time             time.Time
	ExpireTime       time.Duration
	Operation        *Operation
	HTTPRequest      *http.Request
	HTTPResponse     *http.Response
	Body             io.ReadSeeker
	BodyStart        int64 // offset from beginning of Body that the request body starts
	Params           interface{}
	Error            error
	Data             interface{}
	RequestID        string
	RetryCount       int
	Retryable        *bool
	RetryDelay       time.Duration
	NotHoist         bool
	SignedHeaderVals http.Header
	LastSignedAt     time.Time
	// contains filtered or unexported fields
}

A Request is the service request to be made.

func New 

func New(cfg aws.Config, clientInfo metadata.ClientInfo, handlers Handlers,
	retryer Retryer, operation *Operation, params interface{}, data interface{}) *Request

New returns a new Request pointer for the service API operation and parameters.

Params is any value of input parameters to be the request payload. Data is pointer value to an object which the request's response payload will be deserialized to.

func (*Request) Build 

func (r *Request) Build() error

Build will build the request's object so it can be signed and sent to the service. Build will also validate all the request's parameters. Anny additional build Handlers set on this request will be run in the order they were set.

The request will only be built once. Multiple calls to build will have no effect.

If any Validate or Build errors occur the build will stop and the error which occurred will be returned.

func (*Request) DataFilled 

func (r *Request) DataFilled() bool

DataFilled returns true if the request's data for response deserialization target has been set and is a valid. False is returned if data is not set, or is invalid.

func (*Request) EachPage 

func (r *Request) EachPage(fn func(data interface{}, isLastPage bool) (shouldContinue bool)) error

EachPage iterates over each page of a paginated request object. The fn parameter should be a function with the following sample signature: 

func(page *T, lastPage bool) bool {
    return true // return false to stop iterating
}

Where "T" is the structure type matching the output structure of the given operation. For example, a request object generated by DynamoDB.ListTablesRequest() would expect to see dynamodb.ListTablesOutput as the structure "T". The lastPage value represents whether the page is the last page of data or not. The return value of this function should return true to keep iterating or false to stop.

func (*Request) GetBody 

func (r *Request) GetBody() io.ReadSeeker

GetBody will return an io.ReadSeeker of the Request's underlying input body with a concurrency safe wrapper.

func (*Request) HasNextPage 

func (r *Request) HasNextPage() bool

HasNextPage returns true if this request has more pages of data available.

func (*Request) IsErrorExpired 

func (r *Request) IsErrorExpired() bool

IsErrorExpired returns whether the error code is a credential expiry error. Returns false if the request has no Error set.

func (*Request) IsErrorRetryable 

func (r *Request) IsErrorRetryable() bool

IsErrorRetryable returns whether the error is retryable, based on its Code. Returns false if the request has no Error set.

func (*Request) IsErrorThrottle 

func (r *Request) IsErrorThrottle() bool

IsErrorThrottle returns whether the error is to be throttled based on its code. Returns false if the request has no Error set

func (*Request) NextPage 

func (r *Request) NextPage() *Request

NextPage returns a new Request that can be executed to return the next page of result data. Call .Send() on this request to execute it.

func (*Request) ParamsFilled 

func (r *Request) ParamsFilled() bool

ParamsFilled returns if the request's parameters have been populated and the parameters are valid. False is returned if no parameters are provided or invalid.

func (*Request) Presign 

func (r *Request) Presign(expireTime time.Duration) (string, error)

Presign returns the request's signed URL. Error will be returned if the signing fails.

func (*Request) PresignRequest 

func (r *Request) PresignRequest(expireTime time.Duration) (string, http.Header, error)

PresignRequest behaves just like presign, but hoists all headers and signs them. Also returns the signed hash back to the user

func (*Request) ResetBody 

func (r *Request) ResetBody()

ResetBody rewinds the request body backto its starting position, and set's the HTTP Request body reference. When the body is read prior to being sent in the HTTP request it will need to be rewound.

func (*Request) Send 

func (r *Request) Send() error

Send will send the request returning error if errors are encountered.

Send will sign the request prior to sending. All Send Handlers will be executed in the order they were set.

Canceling a request is non-deterministic. If a request has been canceled, then the transport will choose, randomly, one of the state channels during reads or getting the connection.

readLoop() and getConn(req *Request, cm connectMethod) https://github.com/golang/go/blob/master/src/net/http/transport.go

Send will not close the request.Request's body.

func (*Request) SetBufferBody 

func (r *Request) SetBufferBody(buf []byte)

SetBufferBody will set the request's body bytes that will be sent to the service API.

func (*Request) SetReaderBody 

func (r *Request) SetReaderBody(reader io.ReadSeeker)

SetReaderBody will set the request's body reader.

func (*Request) SetStringBody 

func (r *Request) SetStringBody(s string)

SetStringBody sets the body of the request to be backed by a string.

func (*Request) Sign 

func (r *Request) Sign() error

Sign will sign the request returning error if errors are encountered.

Send will build the request prior to signing. All Sign Handlers will be executed in the order they were set.

func (*Request) WillRetry 

func (r *Request) WillRetry() bool

WillRetry returns if the request's can be retried.

type Retryer 

type Retryer interface {
	RetryRules(*Request) time.Duration
	ShouldRetry(*Request) bool
	MaxRetries() int
}

Retryer is an interface to control retry logic for a given service. The default implementation used by most services is the service.DefaultRetryer structure, which contains basic retry logic using exponential backoff.

type Validator 

type Validator interface {
	Validate() error
}

Validator provides a way for types to perform validation logic on their input values that external code can use to determine if a type's values are valid.

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