forked from tinygrasshopper/goamz
/
sns.go
444 lines (365 loc) · 10.2 KB
/
sns.go
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//
// goamz - Go packages to interact with the Amazon Web Services.
//
// https://wiki.ubuntu.com/goamz
//
// Copyright (c) 2011 Memeo Inc.
//
// Written by Prudhvi Krishna Surapaneni <me@prudhvi.net>
// This package is in an experimental state, and does not currently
// follow conventions and style of the rest of goamz or common
// Go conventions. It must be polished before it's considered a
// first-class package in goamz.
package sns
// BUG(niemeyer): Package needs significant clean up.
// BUG(niemeyer): Topic values in responses are not being initialized
// properly, since they're supposed to reference *SNS.
// BUG(niemeyer): Package needs documentation.
// BUG(niemeyer): Message.Message should be "Payload []byte"
// BUG(niemeyer): Message.SNS must be dropped.
import (
"encoding/xml"
"errors"
"github.com/Shop2market/goamz/aws"
"net/http"
"net/url"
"strconv"
"time"
)
// The SNS type encapsulates operation with an SNS region.
type SNS struct {
aws.Auth
aws.Region
private byte // Reserve the right of using private data.
}
type Topic struct {
SNS *SNS
TopicArn string
}
func New(auth aws.Auth, region aws.Region) *SNS {
return &SNS{auth, region, 0}
}
type Message struct {
SNS *SNS
Topic *Topic
Message [8192]byte
Subject string
}
type Subscription struct {
Endpoint string
Owner string
Protocol string
SubscriptionArn string
TopicArn string
}
func (topic *Topic) Message(message [8192]byte, subject string) *Message {
return &Message{topic.SNS, topic, message, subject}
}
type ResponseMetadata struct {
RequestId string `xml:"ResponseMetadata>RequestId"`
BoxUsage float64 `xml:"ResponseMetadata>BoxUsage"`
}
type ListTopicsResp struct {
Topics []Topic `xml:"ListTopicsResult>Topics>member"`
NextToken string
ResponseMetadata
}
type CreateTopicResp struct {
Topic Topic `xml:"CreateTopicResult"`
ResponseMetadata
}
type DeleteTopicResp struct {
ResponseMetadata
}
type ListSubscriptionsResp struct {
Subscriptions []Subscription `xml:"ListSubscriptionsResult>Subscriptions>member"`
NextToken string
ResponseMetadata
}
type AttributeEntry struct {
Key string `xml:"key"`
Value string `xml:"value"`
}
type GetTopicAttributesResp struct {
Attributes []AttributeEntry `xml:"GetTopicAttributesResult>Attributes>entry"`
ResponseMetadata
}
func makeParams(action string) map[string]string {
params := make(map[string]string)
params["Action"] = action
return params
}
// ListTopics
//
// See http://goo.gl/lfrMK for more details.
func (sns *SNS) ListTopics(NextToken *string) (resp *ListTopicsResp, err error) {
resp = &ListTopicsResp{}
params := makeParams("ListTopics")
if NextToken != nil {
params["NextToken"] = *NextToken
}
err = sns.query(nil, nil, params, resp)
return
}
// CreateTopic
//
// See http://goo.gl/m9aAt for more details.
func (sns *SNS) CreateTopic(Name string) (resp *CreateTopicResp, err error) {
resp = &CreateTopicResp{}
params := makeParams("CreateTopic")
params["Name"] = Name
err = sns.query(nil, nil, params, resp)
return
}
// DeleteTopic
//
// See http://goo.gl/OXNcY for more details.
func (sns *SNS) DeleteTopic(topic Topic) (resp *DeleteTopicResp, err error) {
resp = &DeleteTopicResp{}
params := makeParams("DeleteTopic")
params["TopicArn"] = topic.TopicArn
err = sns.query(nil, nil, params, resp)
return
}
// Delete
//
// Helper function for deleting a topic
func (topic *Topic) Delete() (resp *DeleteTopicResp, err error) {
return topic.SNS.DeleteTopic(*topic)
}
// ListSubscriptions
//
// See http://goo.gl/k3aGn for more details.
func (sns *SNS) ListSubscriptions(NextToken *string) (resp *ListSubscriptionsResp, err error) {
resp = &ListSubscriptionsResp{}
params := makeParams("ListSubscriptions")
if NextToken != nil {
params["NextToken"] = *NextToken
}
err = sns.query(nil, nil, params, resp)
return
}
// GetTopicAttributes
//
// See http://goo.gl/WXRoX for more details.
func (sns *SNS) GetTopicAttributes(TopicArn string) (resp *GetTopicAttributesResp, err error) {
resp = &GetTopicAttributesResp{}
params := makeParams("GetTopicAttributes")
params["TopicArn"] = TopicArn
err = sns.query(nil, nil, params, resp)
return
}
type PublishOpt struct {
Message string
MessageStructure string
Subject string
TopicArn string
}
type PublishResp struct {
MessageId string `xml:"PublishResult>MessageId"`
ResponseMetadata
}
// Publish
//
// See http://goo.gl/AY2D8 for more details.
func (sns *SNS) Publish(options *PublishOpt) (resp *PublishResp, err error) {
resp = &PublishResp{}
params := makeParams("Publish")
if options.Subject != "" {
params["Subject"] = options.Subject
}
if options.MessageStructure != "" {
params["MessageStructure"] = options.MessageStructure
}
if options.Message != "" {
params["Message"] = options.Message
}
if options.TopicArn != "" {
params["TopicArn"] = options.TopicArn
}
err = sns.query(nil, nil, params, resp)
return
}
type SetTopicAttributesResponse struct {
ResponseMetadata
}
// SetTopicAttributes
//
// See http://goo.gl/oVYW7 for more details.
func (sns *SNS) SetTopicAttributes(AttributeName, AttributeValue, TopicArn string) (resp *SetTopicAttributesResponse, err error) {
resp = &SetTopicAttributesResponse{}
params := makeParams("SetTopicAttributes")
if AttributeName == "" || TopicArn == "" {
return nil, errors.New("Invalid Attribute Name or TopicArn")
}
params["AttributeName"] = AttributeName
params["AttributeValue"] = AttributeValue
params["TopicArn"] = TopicArn
err = sns.query(nil, nil, params, resp)
return
}
type SubscribeResponse struct {
SubscriptionArn string `xml:"SubscribeResult>SubscriptionArn"`
ResponseMetadata
}
// Subscribe
//
// See http://goo.gl/c3iGS for more details.
func (sns *SNS) Subscribe(Endpoint, Protocol, TopicArn string) (resp *SubscribeResponse, err error) {
resp = &SubscribeResponse{}
params := makeParams("Subscribe")
params["Endpoint"] = Endpoint
params["Protocol"] = Protocol
params["TopicArn"] = TopicArn
err = sns.query(nil, nil, params, resp)
return
}
type UnsubscribeResponse struct {
ResponseMetadata
}
// Unsubscribe
//
// See http://goo.gl/4l5Ge for more details.
func (sns *SNS) Unsubscribe(SubscriptionArn string) (resp *UnsubscribeResponse, err error) {
resp = &UnsubscribeResponse{}
params := makeParams("Unsubscribe")
params["SubscriptionArn"] = SubscriptionArn
err = sns.query(nil, nil, params, resp)
return
}
type ConfirmSubscriptionResponse struct {
SubscriptionArn string `xml:"ConfirmSubscriptionResult>SubscriptionArn"`
ResponseMetadata
}
type ConfirmSubscriptionOpt struct {
AuthenticateOnUnsubscribe string
Token string
TopicArn string
}
// ConfirmSubscription
//
// See http://goo.gl/3hXzH for more details.
func (sns *SNS) ConfirmSubscription(options *ConfirmSubscriptionOpt) (resp *ConfirmSubscriptionResponse, err error) {
resp = &ConfirmSubscriptionResponse{}
params := makeParams("ConfirmSubscription")
if options.AuthenticateOnUnsubscribe != "" {
params["AuthenticateOnUnsubscribe"] = options.AuthenticateOnUnsubscribe
}
params["Token"] = options.Token
params["TopicArn"] = options.TopicArn
err = sns.query(nil, nil, params, resp)
return
}
type Permission struct {
ActionName string
AccountId string
}
type AddPermissionResponse struct {
ResponseMetadata
}
// AddPermission
//
// See http://goo.gl/mbY4a for more details.
func (sns *SNS) AddPermission(permissions []Permission, Label, TopicArn string) (resp *AddPermissionResponse, err error) {
resp = &AddPermissionResponse{}
params := makeParams("AddPermission")
for i, p := range permissions {
params["AWSAccountId.member."+strconv.Itoa(i+1)] = p.AccountId
params["ActionName.member."+strconv.Itoa(i+1)] = p.ActionName
}
params["Label"] = Label
params["TopicArn"] = TopicArn
err = sns.query(nil, nil, params, resp)
return
}
type RemovePermissionResponse struct {
ResponseMetadata
}
// RemovePermission
//
// See http://goo.gl/wGl5j for more details.
func (sns *SNS) RemovePermission(Label, TopicArn string) (resp *RemovePermissionResponse, err error) {
resp = &RemovePermissionResponse{}
params := makeParams("RemovePermission")
params["Label"] = Label
params["TopicArn"] = TopicArn
err = sns.query(nil, nil, params, resp)
return
}
type ListSubscriptionByTopicResponse struct {
Subscriptions []Subscription `xml:"ListSubscriptionsByTopicResult>Subscriptions>member"`
ResponseMetadata
}
type ListSubscriptionByTopicOpt struct {
NextToken string
TopicArn string
}
// ListSubscriptionByTopic
//
// See http://goo.gl/LaVcC for more details.
func (sns *SNS) ListSubscriptionByTopic(options *ListSubscriptionByTopicOpt) (resp *ListSubscriptionByTopicResponse, err error) {
resp = &ListSubscriptionByTopicResponse{}
params := makeParams("ListSbubscriptionByTopic")
if options.NextToken != "" {
params["NextToken"] = options.NextToken
}
params["TopicArn"] = options.TopicArn
err = sns.query(nil, nil, params, resp)
return
}
type Error struct {
StatusCode int
Code string
Message string
RequestId string
}
func (err *Error) Error() string {
return err.Message
}
type xmlErrors struct {
RequestId string
Errors []Error `xml:"Errors>Error"`
}
func (sns *SNS) query(topic *Topic, message *Message, params map[string]string, resp interface{}) error {
params["Timestamp"] = time.Now().UTC().Format(time.RFC3339)
u, err := url.Parse(sns.Region.SNSEndpoint)
if err != nil {
return err
}
sign(sns.Auth, "GET", "/", params, u.Host)
u.RawQuery = multimap(params).Encode()
r, err := http.Get(u.String())
if err != nil {
return err
}
defer r.Body.Close()
//dump, _ := http.DumpResponse(r, true)
//println("DUMP:\n", string(dump))
//return nil
if r.StatusCode != 200 {
return buildError(r)
}
err = xml.NewDecoder(r.Body).Decode(resp)
return err
}
func buildError(r *http.Response) error {
errors := xmlErrors{}
xml.NewDecoder(r.Body).Decode(&errors)
var err Error
if len(errors.Errors) > 0 {
err = errors.Errors[0]
}
err.RequestId = errors.RequestId
err.StatusCode = r.StatusCode
if err.Message == "" {
err.Message = r.Status
}
return &err
}
func multimap(p map[string]string) url.Values {
q := make(url.Values, len(p))
for k, v := range p {
q[k] = []string{v}
}
return q
}