aws

package
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 Go to latest Published: Sep 1, 2015 License: MIT Imports: 20 Imported by: 0

Documentation

Overview

Package aws provides core functionality for making requests to AWS services.

Index

Constants

View Source 
const DefaultRetries = -1

The default number of retries for a service. The value of -1 indicates that the service specific retry default will be used.

View Source 
const SDKName = "aws-sdk-go"

SDKName is the name of this AWS SDK

View Source 
const SDKVersion = "0.7.2"

SDKVersion is the version of this SDK

Variables

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

	// ErrMissingEndpoint is an error that is returned if an endpoint cannot be
	// resolved for a service.
	//
	// @readonly
	ErrMissingEndpoint error = awserr.New("MissingEndpoint", "'Endpoint' configuration is required for this service", nil)
)
View Source 
var DefaultChainCredentials = credentials.NewChainCredentials(
	[]credentials.Provider{
		&credentials.EnvProvider{},
		&credentials.SharedCredentialsProvider{Filename: "", Profile: ""},
		&credentials.EC2RoleProvider{ExpiryWindow: 5 * time.Minute},
	})

DefaultChainCredentials is a Credentials which will find the first available credentials Value from the list of Providers.

This should be used in the default case. Once the type of credentials are known switching to the specific Credentials will be more efficient.

View Source 
var DefaultConfig = NewConfig().
	WithCredentials(DefaultChainCredentials).
	WithRegion(os.Getenv("AWS_REGION")).
	WithHTTPClient(http.DefaultClient).
	WithMaxRetries(DefaultRetries).
	WithLogger(NewDefaultLogger()).
	WithLogLevel(LogOff)

DefaultConfig is the default all service configuration will be based off of. By default, all clients use this structure for initialization options unless a custom configuration object is passed in.

You may modify this global structure to change all default configuration in the SDK. Note that configuration options are copied by value, so any modifications must happen before constructing a client.

Functions

func AfterRetryHandler 

func AfterRetryHandler(r *Request)

AfterRetryHandler performs final checks to determine if the request should be retried and how long to delay.

func Bool 

func Bool(v bool) *bool

Bool returns a pointer to of the bool value passed in.

func BoolMap 

func BoolMap(src map[string]bool) map[string]*bool

BoolMap converts a string map of bool values into a string map of bool pointers

func BoolSlice 

func BoolSlice(src []bool) []*bool

BoolSlice converts a slice of bool values into a slice of bool pointers

func BoolValue 

func BoolValue(v *bool) bool

BoolValue returns the value of the bool pointer passed in or false if the pointer is nil.

func BoolValueMap 

func BoolValueMap(src map[string]*bool) map[string]bool

BoolValueMap converts a string map of bool pointers into a string map of bool values

func BoolValueSlice 

func BoolValueSlice(src []*bool) []bool

BoolValueSlice converts a slice of bool pointers into a slice of bool values

func BuildContentLength 

func BuildContentLength(r *Request)

BuildContentLength builds the content length of a request based on the body, or will use the HTTPRequest.Header's "Content-Length" if defined. If unable to determine request body length and no "Content-Length" was specified it will panic.

func Float64 

func Float64(v float64) *float64

Float64 returns a pointer to of the float64 value passed in.

func Float64Map 

func Float64Map(src map[string]float64) map[string]*float64

Float64Map converts a string map of float64 values into a string map of float64 pointers

func Float64Slice 

func Float64Slice(src []float64) []*float64

Float64Slice converts a slice of float64 values into a slice of float64 pointers

func Float64Value 

func Float64Value(v *float64) float64

Float64Value returns the value of the float64 pointer passed in or 0 if the pointer is nil.

func Float64ValueMap 

func Float64ValueMap(src map[string]*float64) map[string]float64

Float64ValueMap converts a string map of float64 pointers into a string map of float64 values

func Float64ValueSlice 

func Float64ValueSlice(src []*float64) []float64

Float64ValueSlice converts a slice of float64 pointers into a slice of float64 values

func Int 

func Int(v int) *int

Int returns a pointer to of the int value passed in.

func Int64 

func Int64(v int64) *int64

Int64 returns a pointer to of the int64 value passed in.

func Int64Map 

func Int64Map(src map[string]int64) map[string]*int64

Int64Map converts a string map of int64 values into a string map of int64 pointers

func Int64Slice 

func Int64Slice(src []int64) []*int64

Int64Slice converts a slice of int64 values into a slice of int64 pointers

func Int64Value 

func Int64Value(v *int64) int64

Int64Value returns the value of the int64 pointer passed in or 0 if the pointer is nil.

func Int64ValueMap 

func Int64ValueMap(src map[string]*int64) map[string]int64

Int64ValueMap converts a string map of int64 pointers into a string map of int64 values

func Int64ValueSlice 

func Int64ValueSlice(src []*int64) []int64

Int64ValueSlice converts a slice of int64 pointers into a slice of int64 values

func IntMap 

func IntMap(src map[string]int) map[string]*int

IntMap converts a string map of int values into a string map of int pointers

func IntSlice 

func IntSlice(src []int) []*int

IntSlice converts a slice of int values into a slice of int pointers

func IntValue 

func IntValue(v *int) int

IntValue returns the value of the int pointer passed in or 0 if the pointer is nil.

func IntValueMap 

func IntValueMap(src map[string]*int) map[string]int

IntValueMap converts a string map of int pointers into a string map of int values

func IntValueSlice 

func IntValueSlice(src []*int) []int

IntValueSlice converts a slice of int pointers into a slice of int values

func SendHandler 

func SendHandler(r *Request)

SendHandler is a request handler to send service request using HTTP client.

func String 

func String(v string) *string

String returns a pointer to of the string value passed in.

func StringMap 

func StringMap(src map[string]string) map[string]*string

StringMap converts a string map of string values into a string map of string pointers

func StringSlice 

func StringSlice(src []string) []*string

StringSlice converts a slice of string values into a slice of string pointers

func StringValue 

func StringValue(v *string) string

StringValue returns the value of the string pointer passed in or "" if the pointer is nil.

func StringValueMap 

func StringValueMap(src map[string]*string) map[string]string

StringValueMap converts a string map of string pointers into a string map of string values

func StringValueSlice 

func StringValueSlice(src []*string) []string

StringValueSlice converts a slice of string pointers into a slice of string values

func Time 

func Time(v time.Time) *time.Time

Time returns a pointer to of the time.Time value passed in.

func TimeMap 

func TimeMap(src map[string]time.Time) map[string]*time.Time

TimeMap converts a string map of time.Time values into a string map of time.Time pointers

func TimeSlice 

func TimeSlice(src []time.Time) []*time.Time

TimeSlice converts a slice of time.Time values into a slice of time.Time pointers

func TimeValue 

func TimeValue(v *time.Time) time.Time

TimeValue returns the value of the time.Time pointer passed in or time.Time{} if the pointer is nil.

func TimeValueMap 

func TimeValueMap(src map[string]*time.Time) map[string]time.Time

TimeValueMap converts a string map of time.Time pointers into a string map of time.Time values

func TimeValueSlice 

func TimeValueSlice(src []*time.Time) []time.Time

TimeValueSlice converts a slice of time.Time pointers into a slice of time.Time values

func UserAgentHandler 

func UserAgentHandler(r *Request)

UserAgentHandler is a request handler for injecting User agent into requests.

func ValidateEndpointHandler 

func ValidateEndpointHandler(r *Request)

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 ValidateParameters 

func ValidateParameters(r *Request)

ValidateParameters is a request handler to validate the input parameters. Validating parameters only has meaning if done prior to the request being sent.

func ValidateResponseHandler 

func ValidateResponseHandler(r *Request)

ValidateResponseHandler is a request handler to validate service response.

Types

type Config 

type Config struct {
	// The credentials object to use when signing requests. Defaults to
	// {DefaultChainCredentials}.
	Credentials *credentials.Credentials

	// An optional endpoint URL (hostname only or fully qualified URI)
	// that overrides the default generated endpoint for a client. Set this
	// to `""` to use the default generated endpoint.
	//
	// @note You must still provide a `Region` value when specifying an
	//   endpoint for a client.
	Endpoint *string

	// The region to send requests to. This parameter is required and must
	// be configured globally or on a per-client basis unless otherwise
	// noted. A full list of regions is found in the "Regions and Endpoints"
	// document.
	//
	// @see http://docs.aws.amazon.com/general/latest/gr/rande.html
	//   AWS Regions and Endpoints
	Region *string

	// Set this to `true` to disable SSL when sending requests. Defaults
	// to `false`.
	DisableSSL *bool

	// The HTTP client to use when sending requests. Defaults to
	// `http.DefaultClient`.
	HTTPClient *http.Client

	// An integer value representing the logging level. The default log level
	// is zero (LogOff), which represents no logging. To enable logging set
	// to a LogLevel Value.
	LogLevel *LogLevelType

	// The logger writer interface to write logging messages to. Defaults to
	// standard out.
	Logger Logger

	// The maximum number of times that a request will be retried for failures.
	// Defaults to -1, which defers the max retry setting to the service specific
	// configuration.
	MaxRetries *int

	// Disables semantic parameter validation, which validates input for missing
	// required fields and/or other semantic request input errors.
	DisableParamValidation *bool

	// Disables the computation of request and response checksums, e.g.,
	// CRC32 checksums in Amazon DynamoDB.
	DisableComputeChecksums *bool

	// Set this to `true` to force the request to use path-style addressing,
	// i.e., `http://s3.amazonaws.com/BUCKET/KEY`. By default, the S3 client will
	// use virtual hosted bucket addressing when possible
	// (`http://BUCKET.s3.amazonaws.com/KEY`).
	//
	// @note This configuration option is specific to the Amazon S3 service.
	// @see http://docs.aws.amazon.com/AmazonS3/latest/dev/VirtualHosting.html
	//   Amazon S3: Virtual Hosting of Buckets
	S3ForcePathStyle *bool
}

A Config provides service configuration for service clients. By default, all clients will use the {DefaultConfig} structure.

func NewConfig 

func NewConfig() *Config

NewConfig returns a new Config pointer that can be chained with builder methods to set multiple configuration values inline without using pointers. 

svc := s3.New(aws.NewConfig().WithRegion("us-west-2").WithMaxRetries(10))

func (Config) Copy 

func (c Config) Copy() *Config

Copy will return a shallow copy of the Config object.

func (Config) Merge 

func (c Config) Merge(other *Config) *Config

Merge returns a new Config with the other Config's attribute values merged into this Config. If the other Config's attribute is nil it will not be merged into the new Config to be returned.

func (*Config) WithCredentials 

func (c *Config) WithCredentials(creds *credentials.Credentials) *Config

WithCredentials sets a config Credentials value returning a Config pointer for chaining.

func (*Config) WithDisableComputeChecksums 

func (c *Config) WithDisableComputeChecksums(disable bool) *Config

WithDisableComputeChecksums sets a config DisableComputeChecksums value returning a Config pointer for chaining.

func (*Config) WithDisableParamValidation 

func (c *Config) WithDisableParamValidation(disable bool) *Config

WithDisableParamValidation sets a config DisableParamValidation value returning a Config pointer for chaining.

func (*Config) WithDisableSSL 

func (c *Config) WithDisableSSL(disable bool) *Config

WithDisableSSL sets a config DisableSSL value returning a Config pointer for chaining.

func (*Config) WithEndpoint 

func (c *Config) WithEndpoint(endpoint string) *Config

WithEndpoint sets a config Endpoint value returning a Config pointer for chaining.

func (*Config) WithHTTPClient 

func (c *Config) WithHTTPClient(client *http.Client) *Config

WithHTTPClient sets a config HTTPClient value returning a Config pointer for chaining.

func (*Config) WithLogLevel 

func (c *Config) WithLogLevel(level LogLevelType) *Config

WithLogLevel sets a config LogLevel value returning a Config pointer for chaining.

func (*Config) WithLogger 

func (c *Config) WithLogger(logger Logger) *Config

WithLogger sets a config Logger value returning a Config pointer for chaining.

func (*Config) WithMaxRetries 

func (c *Config) WithMaxRetries(max int) *Config

WithMaxRetries sets a config MaxRetries value returning a Config pointer for chaining.

func (*Config) WithRegion 

func (c *Config) WithRegion(region string) *Config

WithRegion sets a config Region value returning a Config pointer for chaining.

func (*Config) WithS3ForcePathStyle 

func (c *Config) WithS3ForcePathStyle(force bool) *Config

WithS3ForcePathStyle sets a config S3ForcePathStyle value returning a Config pointer for chaining.

type HandlerList 

type HandlerList struct {
	// 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 handlers f to the back of the handler list.

func (*HandlerList) PushFront 

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

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

func (*HandlerList) Run 

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

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

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

type LogLevelType 

type LogLevelType uint

A LogLevelType defines the level logging should be performed at. Used to instruct the SDK which statements should be logged. 

const (
	// LogOff states that no logging should be performed by the SDK. This is the
	// default state of the SDK, and should be use to disable all logging.
	LogOff LogLevelType = iota * 0x1000

	// LogDebug state that debug output should be logged by the SDK. This should
	// be used to inspect request made and responses received.
	LogDebug
)
const (
	// LogDebugWithSigning states that the SDK should log request signing and
	// presigning events. This should be used to log the signing details of
	// requests for debugging. Will also enable LogDebug.
	LogDebugWithSigning LogLevelType = LogDebug | (1 << iota)

	// LogDebugWithHTTPBody states the SDK should log HTTP request and response
	// HTTP bodys in addition to the headers and path. This should be used to
	// see the body content of requests and responses made while using the SDK
	// Will also enable LogDebug.
	LogDebugWithHTTPBody
)

Debug Logging Sub Levels

func LogLevel 

func LogLevel(l LogLevelType) *LogLevelType

LogLevel returns the pointer to a LogLevel. Should be used to workaround not being able to take the address of a non-composite literal.

func (*LogLevelType) AtLeast 

func (l *LogLevelType) AtLeast(v LogLevelType) bool

AtLeast returns true if this LogLevel is at least high enough to satisfies v. Is safe to use on nil value LogLevelTypes. If LogLevel is nill, will default to LogOff comparison.

func (*LogLevelType) Matches 

func (l *LogLevelType) Matches(v LogLevelType) bool

Matches returns true if the v LogLevel is enabled by this LogLevel. Should be used with logging sub levels. Is safe to use on nil value LogLevelTypes. If LogLevel is nill, will default to LogOff comparison.

func (*LogLevelType) Value 

func (l *LogLevelType) Value() LogLevelType

Value returns the LogLevel value or the default value LogOff if the LogLevel is nil. Safe to use on nil value LogLevelTypes.

type Logger 

type Logger interface {
	Log(...interface{})
}

A Logger is a minimalistic interface for the SDK to log messages to. Should be used to provide custom logging writers for the SDK to use.

func NewDefaultLogger 

func NewDefaultLogger() Logger

NewDefaultLogger returns a Logger which will write log messages to stdout, and use same formatting runes as the stdlib log.Logger

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 ReaderSeekerCloser 

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

ReaderSeekerCloser represents a reader that can also delegate io.Seeker and io.Closer interfaces to the underlying object if they are available.

func ReadSeekCloser 

func ReadSeekCloser(r io.Reader) ReaderSeekerCloser

ReadSeekCloser wraps a io.Reader returning a ReaderSeakerCloser

func (ReaderSeekerCloser) Close 

func (r ReaderSeekerCloser) Close() error

Close closes the ReaderSeekerCloser.

If the ReaderSeekerCloser is not an io.Closer nothing will be done.

func (ReaderSeekerCloser) Read 

func (r ReaderSeekerCloser) Read(p []byte) (int, error)

Read reads from the reader up to size of p. The number of bytes read, and error if it occurred will be returned.

If the reader is not an io.Reader zero bytes read, and nil error will be returned.

Performs the same functionality as io.Reader Read

func (ReaderSeekerCloser) Seek 

func (r ReaderSeekerCloser) Seek(offset int64, whence int) (int64, error)

Seek sets the offset for the next Read to offset, interpreted according to whence: 0 means relative to the origin of the file, 1 means relative to the current offset, and 2 means relative to the end. Seek returns the new offset and an error, if any.

If the ReaderSeekerCloser is not an io.Seeker nothing will be done.

type Request 

type Request struct {
	*Service
	Handlers     Handlers
	Time         time.Time
	ExpireTime   time.Duration
	Operation    *Operation
	HTTPRequest  *http.Request
	HTTPResponse *http.Response
	Body         io.ReadSeeker

	Params     interface{}
	Error      error
	Data       interface{}
	RequestID  string
	RetryCount uint
	Retryable  *bool
	RetryDelay time.Duration
	// contains filtered or unexported fields
}

A Request is the service request to be made.

func NewRequest 

func NewRequest(service *Service, operation *Operation, params interface{}, data interface{}) *Request

NewRequest 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) HasNextPage 

func (r *Request) HasNextPage() bool

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

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) 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.

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 retuning 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 Service 

type Service struct {
	Config            *Config
	Handlers          Handlers
	ServiceName       string
	APIVersion        string
	Endpoint          string
	SigningName       string
	SigningRegion     string
	JSONVersion       string
	TargetPrefix      string
	RetryRules        func(*Request) time.Duration
	ShouldRetry       func(*Request) bool
	DefaultMaxRetries uint
}

A Service implements the base service request and response handling used by all services.

func NewService 

func NewService(config *Config) *Service

NewService will return a pointer to a new Server object initialized.

func (*Service) AddDebugHandlers 

func (s *Service) AddDebugHandlers()

AddDebugHandlers injects debug logging handlers into the service to log request debug information.

func (*Service) Initialize 

func (s *Service) Initialize()

Initialize initializes the service.

func (*Service) MaxRetries 

func (s *Service) MaxRetries() uint

MaxRetries returns the number of maximum returns the service will use to make an individual API request.

Source Files

View all Source files

Directories

Path Synopsis
Package awserr represents API error interface accessors for the SDK.
 Package awserr represents API error interface accessors for the SDK.
Package credentials provides credential retrieval and management The Credentials is the primary method of getting access to and managing credentials Values.
 Package credentials provides credential retrieval and management The Credentials is the primary method of getting access to and managing credentials Values.
stscreds
Package stscreds are credential Providers to retrieve STS AWS credentials.
 Package stscreds are credential Providers to retrieve STS AWS credentials.

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