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README

Minio Go Client SDK for Amazon S3 Compatible Cloud Storage Gitter

The Minio Go Client SDK provides simple APIs to access any Amazon S3 compatible object storage.

Supported cloud storage providers:

  • AWS Signature Version 4

    • Amazon S3
    • Minio

  • AWS Signature Version 2

    • Google Cloud Storage (Compatibility Mode)
    • Openstack Swift + Swift3 middleware
    • Ceph Object Gateway
    • Riak CS

This quickstart guide will show you how to install the Minio client SDK, connect to Minio, and provide a walkthrough for a simple file uploader. For a complete list of APIs and examples, please take a look at the Go Client API Reference.

This document assumes that you have a working Go development environment.

Download from Github


go get -u github.com/minio/minio-go

Initialize Minio Client

Minio client requires the following four parameters specified to connect to an Amazon S3 compatible object storage.

Parameter Description
endpoint URL to object storage service.
accessKeyID Access key is the user ID that uniquely identifies your account.
secretAccessKey Secret key is the password to your account.
secure Set this value to 'true' to enable secure (HTTPS) access. 

package main

import (
	"github.com/minio/minio-go"
	"log"
)

func main() {
	endpoint := "play.minio.io:9000"
	accessKeyID := "Q3AM3UQ867SPQQA43P2F"
	secretAccessKey := "zuf+tfteSlswRu7BJ86wekitnifILbZam1KYY3TG"
	useSSL := true

	// Initialize minio client object.
	minioClient, err := minio.New(endpoint, accessKeyID, secretAccessKey, useSSL)
	if err != nil {
		log.Fatalln(err)
	}

	log.Println("%v", minioClient) // minioClient is now setup

Quick Start Example - File Uploader

This example program connects to an object storage server, creates a bucket and uploads a file to the bucket.

We will use the Minio server running at https://play.minio.io:9000 in this example. Feel free to use this service for testing and development. Access credentials shown in this example are open to the public.

FileUploader.go
package main

import (
	"github.com/minio/minio-go"
	"log"
)

func main() {
	endpoint := "play.minio.io:9000"
	accessKeyID := "Q3AM3UQ867SPQQA43P2F"
	secretAccessKey := "zuf+tfteSlswRu7BJ86wekitnifILbZam1KYY3TG"
	useSSL := true

	// Initialize minio client object.
	minioClient, err := minio.New(endpoint, accessKeyID, secretAccessKey, useSSL)
	if err != nil {
		log.Fatalln(err)
	}

	// Make a new bucked called mymusic.
	bucketName := "mymusic"
	location := "us-east-1"

	err = minioClient.MakeBucket(bucketName, location)
	if err != nil {
		// Check to see if we already own this bucket (which happens if you run this twice)
		exists, err := minioClient.BucketExists(bucketName)
		if err == nil && exists {
			log.Printf("We already own %s\n", bucketName)
		} else {
			log.Fatalln(err)
		}
	}
	log.Printf("Successfully created %s\n", bucketName)

	// Upload the zip file
	objectName := "golden-oldies.zip"
	filePath := "/tmp/golden-oldies.zip"
	contentType := "application/zip"

	// Upload the zip file with FPutObject
	n, err := minioClient.FPutObject(bucketName, objectName, filePath, contentType)
	if err != nil {
		log.Fatalln(err)
	}

	log.Printf("Successfully uploaded %s of size %d\n", objectName, n)
}
Run FileUploader

go run file-uploader.go
2016/08/13 17:03:28 Successfully created mymusic 
2016/08/13 17:03:40 Successfully uploaded golden-oldies.zip of size 16253413

mc ls play/mymusic/
[2016-05-27 16:02:16 PDT]  17MiB golden-oldies.zip

API Reference

The full API Reference is available here.

API Reference : Bucket Operations
API Reference : Bucket policy Operations
API Reference : Bucket notification Operations
API Reference : File Object Operations
API Reference : Object Operations
API Reference : Presigned Operations
API Reference : Client custom settings

Full Examples

Full Examples : Bucket Operations
Full Examples : Bucket policy Operations
Full Examples : Bucket notification Operations
Full Examples : File Object Operations
Full Examples : Object Operations
Full Examples : Presigned Operations

Explore Further

Contribute

Contributors Guide

Build Status Build status

Documentation

Index

Constants

View Source 
const (
	ObjectCreatedAll                     NotificationEventType = "s3:ObjectCreated:*"
	ObjectCreatePut                                            = "s3:ObjectCreated:Put"
	ObjectCreatedPost                                          = "s3:ObjectCreated:Post"
	ObjectCreatedCopy                                          = "s3:ObjectCreated:Copy"
	ObjectCreatedCompleteMultipartUpload                       = "sh:ObjectCreated:CompleteMultipartUpload"
	ObjectRemovedAll                                           = "s3:ObjectRemoved:*"
	ObjectRemovedDelete                                        = "s3:ObjectRemoved:Delete"
	ObjectRemovedDeleteMarkerCreated                           = "s3:ObjectRemoved:DeleteMarkerCreated"
	ObjectReducedRedundancyLostObject                          = "s3:ReducedRedundancyLostObject"
)

The role of all event types are described in : 

http://docs.aws.amazon.com/AmazonS3/latest/dev/NotificationHowTo.html#notification-how-to-event-types-and-destinations
View Source 
const MaxJitter = 1.0

MaxJitter will randomize over the full exponential backoff time

View Source 
const NoJitter = 0.0

NoJitter disables the use of jitter for randomizing the exponential backoff time

Variables

View Source 
var ErrInvalidObjectPrefix = ErrInvalidObjectName

ErrInvalidObjectPrefix - Invalid object prefix response is similar to object name response.

View Source 
var MaxRetry = 5

MaxRetry is the maximum number of retries before stopping.

Functions

func ErrAPINotSupported 

func ErrAPINotSupported(message string) error

ErrAPINotSupported - API not supported response The specified API call is not supported

func ErrEntityTooLarge added in v1.0.0 

func ErrEntityTooLarge(totalSize, maxObjectSize int64, bucketName, objectName string) error

ErrEntityTooLarge - Input size is larger than supported maximum.

func ErrEntityTooSmall added in v1.0.0 

func ErrEntityTooSmall(totalSize int64, bucketName, objectName string) error

ErrEntityTooSmall - Input size is smaller than supported minimum.

func ErrInvalidArgument added in v1.0.0 

func ErrInvalidArgument(message string) error

ErrInvalidArgument - Invalid argument response.

func ErrInvalidBucketName added in v1.0.0 

func ErrInvalidBucketName(message string) error

ErrInvalidBucketName - Invalid bucket name response.

func ErrInvalidObjectName added in v1.0.0 

func ErrInvalidObjectName(message string) error

ErrInvalidObjectName - Invalid object name response.

func ErrNoSuchBucketPolicy 

func ErrNoSuchBucketPolicy(message string) error

ErrNoSuchBucketPolicy - No Such Bucket Policy response The specified bucket does not have a bucket policy.

func ErrUnexpectedEOF added in v1.0.0 

func ErrUnexpectedEOF(totalRead, totalSize int64, bucketName, objectName string) error

ErrUnexpectedEOF - Unexpected end of file reached.

Types

type Arn 

type Arn struct {
	Partition string
	Service   string
	Region    string
	AccountID string
	Resource  string
}

Arn - holds ARN information that will be sent to the web service, ARN desciption can be found in http://docs.aws.amazon.com/general/latest/gr/aws-arns-and-namespaces.html

func NewArn 

func NewArn(partition, service, region, accountID, resource string) Arn

NewArn creates new ARN based on the given partition, service, region, account id and resource

func (Arn) String 

func (arn Arn) String() string

Return the string format of the ARN

type BucketInfo added in v1.0.0 

type BucketInfo struct {
	// The name of the bucket.
	Name string `json:"name"`
	// Date the bucket was created.
	CreationDate time.Time `json:"creationDate"`
}

BucketInfo container for bucket metadata.

type BucketNotification 

type BucketNotification struct {
	XMLName       xml.Name       `xml:"NotificationConfiguration"`
	LambdaConfigs []LambdaConfig `xml:"CloudFunctionConfiguration"`
	TopicConfigs  []TopicConfig  `xml:"TopicConfiguration"`
	QueueConfigs  []QueueConfig  `xml:"QueueConfiguration"`
}

BucketNotification - the struct that represents the whole XML to be sent to the web service

func (*BucketNotification) AddLambda 

func (b *BucketNotification) AddLambda(lambdaConfig NotificationConfig)

AddLambda adds a given lambda config to the general bucket notification config

func (*BucketNotification) AddQueue 

func (b *BucketNotification) AddQueue(queueConfig NotificationConfig)

AddQueue adds a given queue config to the general bucket notification config

func (*BucketNotification) AddTopic 

func (b *BucketNotification) AddTopic(topicConfig NotificationConfig)

AddTopic adds a given topic config to the general bucket notification config

func (*BucketNotification) RemoveLambdaByArn 

func (b *BucketNotification) RemoveLambdaByArn(arn Arn)

RemoveLambdaByArn removes all lambda configurations that match the exact specified ARN

func (*BucketNotification) RemoveQueueByArn 

func (b *BucketNotification) RemoveQueueByArn(arn Arn)

RemoveQueueByArn removes all queue configurations that match the exact specified ARN

func (*BucketNotification) RemoveTopicByArn 

func (b *BucketNotification) RemoveTopicByArn(arn Arn)

RemoveTopicByArn removes all topic configurations that match the exact specified ARN

type Client added in v1.0.0 

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

Client implements Amazon S3 compatible methods.

func New 

func New(endpoint string, accessKeyID, secretAccessKey string, secure bool) (*Client, error)

New - instantiate minio client Client, adds automatic verification of signature.

func NewV2 added in v1.0.0 

func NewV2(endpoint string, accessKeyID, secretAccessKey string, secure bool) (*Client, error)

NewV2 - instantiate minio client with Amazon S3 signature version '2' compatibility.

func NewV4 added in v1.0.0 

func NewV4(endpoint string, accessKeyID, secretAccessKey string, secure bool) (*Client, error)

NewV4 - instantiate minio client with Amazon S3 signature version '4' compatibility.

func (Client) BucketExists added in v1.0.0 

func (c Client) BucketExists(bucketName string) (bool, error)

BucketExists verify if bucket exists and you have permission to access it.

func (Client) CopyObject 

func (c Client) CopyObject(bucketName string, objectName string, objectSource string, cpCond CopyConditions) error

CopyObject - copy a source object into a new object with the provided name in the provided bucket

func (Client) FGetObject added in v1.0.0 

func (c Client) FGetObject(bucketName, objectName, filePath string) error

FGetObject - download contents of an object to a local file.

func (Client) FPutObject added in v1.0.0 

func (c Client) FPutObject(bucketName, objectName, filePath, contentType string) (n int64, err error)

FPutObject - Create an object in a bucket, with contents from file at filePath.

func (Client) GetBucketLocation 

func (c Client) GetBucketLocation(bucketName string) (string, error)

GetBucketLocation - get location for the bucket name from location cache, if not fetch freshly by making a new request.

func (Client) GetBucketNotification 

func (c Client) GetBucketNotification(bucketName string) (bucketNotification BucketNotification, err error)

GetBucketNotification - get bucket notification at a given path.

func (Client) GetBucketPolicy 

func (c Client) GetBucketPolicy(bucketName, objectPrefix string) (bucketPolicy policy.BucketPolicy, err error)

GetBucketPolicy - get bucket policy at a given path.

func (Client) GetObject added in v1.0.0 

func (c Client) GetObject(bucketName, objectName string) (*Object, error)

GetObject - returns an seekable, readable object.

func (Client) ListBucketPolicies 

func (c Client) ListBucketPolicies(bucketName, objectPrefix string) (bucketPolicies map[string]policy.BucketPolicy, err error)

ListBucketPolicies - list all policies for a given prefix and all its children.

func (Client) ListBuckets added in v1.0.0 

func (c Client) ListBuckets() ([]BucketInfo, error)

ListBuckets list all buckets owned by this authenticated user.

This call requires explicit authentication, no anonymous requests are allowed for listing buckets. 

api := client.New(....)
for message := range api.ListBuckets() {
    fmt.Println(message)
}

func (Client) ListIncompleteUploads added in v1.0.0 

func (c Client) ListIncompleteUploads(bucketName, objectPrefix string, recursive bool, doneCh <-chan struct{}) <-chan ObjectMultipartInfo

ListIncompleteUploads - List incompletely uploaded multipart objects.

ListIncompleteUploads lists all incompleted objects matching the objectPrefix from the specified bucket. If recursion is enabled it would list all subdirectories and all its contents.

Your input parameters are just bucketName, objectPrefix, recursive and a done channel to pro-actively close the internal go routine. If you enable recursive as 'true' this function will return back all the multipart objects in a given bucket name. 

api := client.New(....)
// Create a done channel.
doneCh := make(chan struct{})
defer close(doneCh)
// Recurively list all objects in 'mytestbucket'
recursive := true
for message := range api.ListIncompleteUploads("mytestbucket", "starthere", recursive) {
    fmt.Println(message)
}

func (Client) ListObjects added in v1.0.0 

func (c Client) ListObjects(bucketName, objectPrefix string, recursive bool, doneCh <-chan struct{}) <-chan ObjectInfo

ListObjects - (List Objects) - List some objects or all recursively.

ListObjects lists all objects matching the objectPrefix from the specified bucket. If recursion is enabled it would list all subdirectories and all its contents.

Your input parameters are just bucketName, objectPrefix, recursive and a done channel for pro-actively closing the internal go routine. If you enable recursive as 'true' this function will return back all the objects in a given bucket name and object prefix. 

api := client.New(....)
// Create a done channel.
doneCh := make(chan struct{})
defer close(doneCh)
// Recurively list all objects in 'mytestbucket'
recursive := true
for message := range api.ListObjects("mytestbucket", "starthere", recursive, doneCh) {
    fmt.Println(message)
}

func (Client) ListObjectsV2 

func (c Client) ListObjectsV2(bucketName, objectPrefix string, recursive bool, doneCh <-chan struct{}) <-chan ObjectInfo

ListObjectsV2 lists all objects matching the objectPrefix from the specified bucket. If recursion is enabled it would list all subdirectories and all its contents.

Your input parameters are just bucketName, objectPrefix, recursive and a done channel for pro-actively closing the internal go routine. If you enable recursive as 'true' this function will return back all the objects in a given bucket name and object prefix. 

api := client.New(....)
// Create a done channel.
doneCh := make(chan struct{})
defer close(doneCh)
// Recurively list all objects in 'mytestbucket'
recursive := true
for message := range api.ListObjectsV2("mytestbucket", "starthere", recursive, doneCh) {
    fmt.Println(message)
}

func (Client) ListenBucketNotification 

func (c Client) ListenBucketNotification(bucketName, prefix, suffix string, events []string, doneCh <-chan struct{}) <-chan NotificationInfo

ListenBucketNotification - listen on bucket notifications.

func (Client) MakeBucket added in v1.0.0 

func (c Client) MakeBucket(bucketName string, location string) error

MakeBucket creates a new bucket with bucketName.

Location is an optional argument, by default all buckets are created in US Standard Region.

For Amazon S3 for more supported regions - http://docs.aws.amazon.com/general/latest/gr/rande.html For Google Cloud Storage for more supported regions - https://cloud.google.com/storage/docs/bucket-locations

func (Client) PresignedGetObject added in v1.0.0 

func (c Client) PresignedGetObject(bucketName string, objectName string, expires time.Duration, reqParams url.Values) (u *url.URL, err error)

PresignedGetObject - Returns a presigned URL to access an object without credentials. Expires maximum is 7days - ie. 604800 and minimum is 1. Additionally you can override a set of response headers using the query parameters.

func (Client) PresignedPostPolicy added in v1.0.0 

func (c Client) PresignedPostPolicy(p *PostPolicy) (u *url.URL, formData map[string]string, err error)

PresignedPostPolicy - Returns POST urlString, form data to upload an object.

func (Client) PresignedPutObject added in v1.0.0 

func (c Client) PresignedPutObject(bucketName string, objectName string, expires time.Duration) (u *url.URL, err error)

PresignedPutObject - Returns a presigned URL to upload an object without credentials. Expires maximum is 7days - ie. 604800 and minimum is 1.

func (Client) PutObject added in v1.0.0 

func (c Client) PutObject(bucketName, objectName string, reader io.Reader, contentType string) (n int64, err error)

PutObject creates an object in a bucket.

You must have WRITE permissions on a bucket to create an object.

  • For size smaller than 5MiB PutObject automatically does a single atomic Put operation.
  • For size larger than 5MiB PutObject automatically does a resumable multipart Put operation.
  • For size input as -1 PutObject does a multipart Put operation until input stream reaches EOF. Maximum object size that can be uploaded through this operation will be 5TiB.

NOTE: Google Cloud Storage does not implement Amazon S3 Compatible multipart PUT. So we fall back to single PUT operation with the maximum limit of 5GiB.

NOTE: For anonymous requests Amazon S3 doesn't allow multipart upload. So we fall back to single PUT operation.

func (Client) PutObjectWithMetadata 

func (c Client) PutObjectWithMetadata(bucketName, objectName string, reader io.Reader, metaData map[string][]string, progress io.Reader) (n int64, err error)

PutObjectWithMetadata - with metadata.

func (Client) PutObjectWithProgress added in v1.0.0 

func (c Client) PutObjectWithProgress(bucketName, objectName string, reader io.Reader, contentType string, progress io.Reader) (n int64, err error)

PutObjectWithProgress - with progress.

func (Client) RemoveAllBucketNotification 

func (c Client) RemoveAllBucketNotification(bucketName string) error

RemoveAllBucketNotification - Remove bucket notification clears all previously specified config

func (Client) RemoveBucket added in v1.0.0 

func (c Client) RemoveBucket(bucketName string) error

RemoveBucket deletes the bucket name. 

All objects (including all object versions and delete markers).
in the bucket must be deleted before successfully attempting this request.

func (Client) RemoveIncompleteUpload added in v1.0.0 

func (c Client) RemoveIncompleteUpload(bucketName, objectName string) error

RemoveIncompleteUpload aborts an partially uploaded object. Requires explicit authentication, no anonymous requests are allowed for multipart API.

func (Client) RemoveObject added in v1.0.0 

func (c Client) RemoveObject(bucketName, objectName string) error

RemoveObject remove an object from a bucket.

func (Client) RemoveObjects 

func (c Client) RemoveObjects(bucketName string, objectsCh <-chan string) <-chan RemoveObjectError

RemoveObjects remove multiples objects from a bucket. The list of objects to remove are received from objectsCh. Remove failures are sent back via error channel.

func (*Client) SetAppInfo added in v1.0.0 

func (c *Client) SetAppInfo(appName string, appVersion string)

SetAppInfo - add application details to user agent.

func (Client) SetBucketNotification 

func (c Client) SetBucketNotification(bucketName string, bucketNotification BucketNotification) error

SetBucketNotification saves a new bucket notification.

func (Client) SetBucketPolicy 

func (c Client) SetBucketPolicy(bucketName string, objectPrefix string, bucketPolicy policy.BucketPolicy) error

SetBucketPolicy set the access permissions on an existing bucket.

For example 

none - owner gets full access [default].
readonly - anonymous get access for everyone at a given object prefix.
readwrite - anonymous list/put/delete access to a given object prefix.
writeonly - anonymous put/delete access to a given object prefix.

func (*Client) SetCustomTransport added in v1.0.0 

func (c *Client) SetCustomTransport(customHTTPTransport http.RoundTripper)

SetCustomTransport - set new custom transport.

func (Client) StatObject added in v1.0.0 

func (c Client) StatObject(bucketName, objectName string) (ObjectInfo, error)

StatObject verifies if object exists and you have permission to access.

func (*Client) TraceOff added in v1.0.0 

func (c *Client) TraceOff()

TraceOff - disable HTTP tracing.

func (*Client) TraceOn added in v1.0.0 

func (c *Client) TraceOn(outputStream io.Writer)

TraceOn - enable HTTP tracing.

type CopyConditions 

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

CopyConditions - copy conditions.

func NewCopyConditions 

func NewCopyConditions() CopyConditions

NewCopyConditions - Instantiate new list of conditions.

func (*CopyConditions) SetMatchETag 

func (c *CopyConditions) SetMatchETag(etag string) error

SetMatchETag - set match etag.

func (*CopyConditions) SetMatchETagExcept 

func (c *CopyConditions) SetMatchETagExcept(etag string) error

SetMatchETagExcept - set match etag except.

func (*CopyConditions) SetModified 

func (c *CopyConditions) SetModified(modTime time.Time) error

SetModified - set modified time since.

func (*CopyConditions) SetUnmodified 

func (c *CopyConditions) SetUnmodified(modTime time.Time) error

SetUnmodified - set unmodified time since.

type ErrorResponse 

type ErrorResponse struct {
	XMLName    xml.Name `xml:"Error" json:"-"`
	Code       string
	Message    string
	BucketName string
	Key        string
	RequestID  string `xml:"RequestId"`
	HostID     string `xml:"HostId"`

	// Region where the bucket is located. This header is returned
	// only in HEAD bucket and ListObjects response.
	Region string
}

ErrorResponse - Is the typed error returned by all API operations.

func ToErrorResponse 

func ToErrorResponse(err error) ErrorResponse

ToErrorResponse - Returns parsed ErrorResponse struct from body and http headers.

For example: 

import s3 "github.com/minio/minio-go"
...
...
reader, stat, err := s3.GetObject(...)
if err != nil {
   resp := s3.ToErrorResponse(err)
}
...

func (ErrorResponse) Error 

func (e ErrorResponse) Error() string

Error - Returns HTTP error string

type Filter 

type Filter struct {
	S3Key S3Key `xml:"S3Key,omitempty"`
}

Filter - a tag in the notification xml structure which carries suffix/prefix filters

type FilterRule 

type FilterRule struct {
	Name  string `xml:"Name"`
	Value string `xml:"Value"`
}

FilterRule - child of S3Key, a tag in the notification xml which carries suffix/prefix filters

type LambdaConfig 

type LambdaConfig struct {
	NotificationConfig
	Lambda string `xml:"CloudFunction"`
}

LambdaConfig carries one single cloudfunction notification configuration

type NotificationConfig 

type NotificationConfig struct {
	ID     string                  `xml:"Id,omitempty"`
	Arn    Arn                     `xml:"-"`
	Events []NotificationEventType `xml:"Event"`
	Filter *Filter                 `xml:"Filter,omitempty"`
}

NotificationConfig - represents one single notification configuration such as topic, queue or lambda configuration.

func NewNotificationConfig 

func NewNotificationConfig(arn Arn) NotificationConfig

NewNotificationConfig creates one notification config and sets the given ARN

func (*NotificationConfig) AddEvents 

func (t *NotificationConfig) AddEvents(events ...NotificationEventType)

AddEvents adds one event to the current notification config

func (*NotificationConfig) AddFilterPrefix 

func (t *NotificationConfig) AddFilterPrefix(prefix string)

AddFilterPrefix sets the prefix configuration to the current notification config

func (*NotificationConfig) AddFilterSuffix 

func (t *NotificationConfig) AddFilterSuffix(suffix string)

AddFilterSuffix sets the suffix configuration to the current notification config

type NotificationEvent 

type NotificationEvent struct {
	EventVersion      string            `json:"eventVersion"`
	EventSource       string            `json:"eventSource"`
	AwsRegion         string            `json:"awsRegion"`
	EventTime         string            `json:"eventTime"`
	EventName         string            `json:"eventName"`
	UserIdentity      identity          `json:"userIdentity"`
	RequestParameters map[string]string `json:"requestParameters"`
	ResponseElements  map[string]string `json:"responseElements"`
	S3                eventMeta         `json:"s3"`
}

NotificationEvent represents an Amazon an S3 bucket notification event.

type NotificationEventType 

type NotificationEventType string

NotificationEventType is a S3 notification event associated to the bucket notification configuration

type NotificationInfo 

type NotificationInfo struct {
	Records []NotificationEvent
	Err     error
}

NotificationInfo - represents the collection of notification events, additionally also reports errors if any while listening on bucket notifications.

type Object added in v1.0.0 

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

Object represents an open object. It implements Read, ReadAt, Seeker, Close for a HTTP stream.

func (*Object) Close added in v1.0.0 

func (o *Object) Close() (err error)

Close - The behavior of Close after the first call returns error for subsequent Close() calls.

func (*Object) Read added in v1.0.0 

func (o *Object) Read(b []byte) (n int, err error)

Read reads up to len(b) bytes into b. It returns the number of bytes read (0 <= n <= len(p)) and any error encountered. Returns io.EOF upon end of file.

func (*Object) ReadAt added in v1.0.0 

func (o *Object) ReadAt(b []byte, offset int64) (n int, err error)

ReadAt reads len(b) bytes from the File starting at byte offset off. It returns the number of bytes read and the error, if any. ReadAt always returns a non-nil error when n < len(b). At end of file, that error is io.EOF.

func (*Object) Seek added in v1.0.0 

func (o *Object) Seek(offset int64, whence int) (n int64, err error)

Seek sets the offset for the next Read or Write 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.

Seeking to a negative offset is an error. Seeking to any positive offset is legal, subsequent io operations succeed until the underlying object is not closed.

func (*Object) Stat added in v1.0.0 

func (o *Object) Stat() (ObjectInfo, error)

Stat returns the ObjectInfo structure describing Object.

type ObjectInfo added in v1.0.0 

type ObjectInfo struct {
	// An ETag is optionally set to md5sum of an object.  In case of multipart objects,
	// ETag is of the form MD5SUM-N where MD5SUM is md5sum of all individual md5sums of
	// each parts concatenated into one string.
	ETag string `json:"etag"`

	Key          string    `json:"name"`         // Name of the object
	LastModified time.Time `json:"lastModified"` // Date and time the object was last modified.
	Size         int64     `json:"size"`         // Size in bytes of the object.
	ContentType  string    `json:"contentType"`  // A standard MIME type describing the format of the object data.

	// Collection of additional metadata on the object.
	// eg: x-amz-meta-*, content-encoding etc.
	Metadata http.Header `json:"metadata"`

	// Owner name.
	Owner struct {
		DisplayName string `json:"name"`
		ID          string `json:"id"`
	} `json:"owner"`

	// The class of storage used to store the object.
	StorageClass string `json:"storageClass"`

	// Error
	Err error `json:"-"`
}

ObjectInfo container for object metadata.

type ObjectMultipartInfo added in v1.0.0 

type ObjectMultipartInfo struct {
	// Date and time at which the multipart upload was initiated.
	Initiated time.Time `type:"timestamp" timestampFormat:"iso8601"`

	Initiator initiator
	Owner     owner

	// The type of storage to use for the object. Defaults to 'STANDARD'.
	StorageClass string

	// Key of the object for which the multipart upload was initiated.
	Key string

	// Size in bytes of the object.
	Size int64

	// Upload ID that identifies the multipart upload.
	UploadID string `xml:"UploadId"`

	// Error
	Err error
}

ObjectMultipartInfo container for multipart object metadata.

type PostPolicy added in v1.0.0 

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

PostPolicy - Provides strict static type conversion and validation for Amazon S3's POST policy JSON string.

func NewPostPolicy added in v1.0.0 

func NewPostPolicy() *PostPolicy

NewPostPolicy - Instantiate new post policy.

func (*PostPolicy) SetBucket added in v1.0.0 

func (p *PostPolicy) SetBucket(bucketName string) error

SetBucket - Sets bucket at which objects will be uploaded to.

func (*PostPolicy) SetContentLengthRange added in v1.0.0 

func (p *PostPolicy) SetContentLengthRange(min, max int64) error

SetContentLengthRange - Set new min and max content length condition for all incoming uploads.

func (*PostPolicy) SetContentType added in v1.0.0 

func (p *PostPolicy) SetContentType(contentType string) error

SetContentType - Sets content-type of the object for this policy based upload.

func (*PostPolicy) SetExpires added in v1.0.0 

func (p *PostPolicy) SetExpires(t time.Time) error

SetExpires - Sets expiration time for the new policy.

func (*PostPolicy) SetKey added in v1.0.0 

func (p *PostPolicy) SetKey(key string) error

SetKey - Sets an object name for the policy based upload.

func (*PostPolicy) SetKeyStartsWith added in v1.0.0 

func (p *PostPolicy) SetKeyStartsWith(keyStartsWith string) error

SetKeyStartsWith - Sets an object name that an policy based upload can start with.

func (*PostPolicy) SetSuccessStatusAction 

func (p *PostPolicy) SetSuccessStatusAction(status string) error

SetSuccessStatusAction - Sets the status success code of the object for this policy based upload.

func (PostPolicy) String added in v1.0.0 

func (p PostPolicy) String() string

Stringer interface for printing policy in json formatted string.

type QueueConfig 

type QueueConfig struct {
	NotificationConfig
	Queue string `xml:"Queue"`
}

QueueConfig carries one single queue notification configuration

type RemoveObjectError 

type RemoveObjectError struct {
	ObjectName string
	Err        error
}

RemoveObjectError - container of Multi Delete S3 API error

type S3Key 

type S3Key struct {
	FilterRules []FilterRule `xml:"FilterRule,omitempty"`
}

S3Key - child of Filter, a tag in the notification xml which carries suffix/prefix filters

type SignatureType added in v1.0.0 

type SignatureType int

SignatureType is type of Authorization requested for a given HTTP request. 

const (
	Latest SignatureType = iota
	SignatureV4
	SignatureV2
)

Different types of supported signatures - default is Latest i.e SignatureV4.

type TopicConfig 

type TopicConfig struct {
	NotificationConfig
	Topic string `xml:"Topic"`
}

TopicConfig carries one single topic notification configuration

Source Files

View all Source files

Directories

Path Synopsis
pkg
policy
s3signer
s3utils
set

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