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history_request.go
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history_request.go
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package pubnub
import (
"bytes"
"encoding/json"
"fmt"
"github.com/pubnub/go/pnerr"
"github.com/pubnub/go/utils"
"io/ioutil"
"strconv"
"net/http"
"net/url"
)
const historyPath = "/v2/history/sub-key/%s/channel/%s"
const maxCount = 100
var emptyHistoryResp *HistoryResponse
type historyBuilder struct {
opts *historyOpts
}
func newHistoryBuilder(pubnub *PubNub) *historyBuilder {
builder := historyBuilder{
opts: &historyOpts{
pubnub: pubnub,
},
}
return &builder
}
func newHistoryBuilderWithContext(pubnub *PubNub,
context Context) *historyBuilder {
builder := historyBuilder{
opts: &historyOpts{
pubnub: pubnub,
ctx: context,
},
}
return &builder
}
// Channel sets the Channel for the History request.
func (b *historyBuilder) Channel(ch string) *historyBuilder {
b.opts.Channel = ch
return b
}
// Start sets the Start Timetoken for the History request.
func (b *historyBuilder) Start(start int64) *historyBuilder {
b.opts.Start = start
b.opts.setStart = true
return b
}
// End sets the End Timetoken for the History request.
func (b *historyBuilder) End(end int64) *historyBuilder {
b.opts.End = end
b.opts.setEnd = true
return b
}
// Count sets the number of items to return in the History request.
func (b *historyBuilder) Count(count int) *historyBuilder {
b.opts.Count = count
return b
}
// Reverse sets the order of messages in the History request.
func (b *historyBuilder) Reverse(r bool) *historyBuilder {
b.opts.Reverse = r
return b
}
// IncludeTimetoken tells the server to send the timetoken associated with each history item.
func (b *historyBuilder) IncludeTimetoken(i bool) *historyBuilder {
b.opts.IncludeTimetoken = i
return b
}
// WithMeta fetches the meta data associated with the message
func (b *historyBuilder) WithMeta(withMeta bool) *historyBuilder {
b.opts.WithMeta = withMeta
return b
}
// QueryParam accepts a map, the keys and values of the map are passed as the query string parameters of the URL called by the API.
func (b *historyBuilder) QueryParam(queryParam map[string]string) *historyBuilder {
b.opts.QueryParam = queryParam
return b
}
// Transport sets the Transport for the History request.
func (b *historyBuilder) Transport(tr http.RoundTripper) *historyBuilder {
b.opts.Transport = tr
return b
}
// Execute runs the History request.
func (b *historyBuilder) Execute() (*HistoryResponse, StatusResponse, error) {
rawJSON, status, err := executeRequest(b.opts)
if err != nil {
return emptyHistoryResp, status, err
}
return newHistoryResponse(rawJSON, b.opts, status)
}
type historyOpts struct {
pubnub *PubNub
Channel string
Start int64
End int64
QueryParam map[string]string
WithMeta bool
// default: 100
Count int
// default: false
Reverse bool
// default: false
IncludeTimetoken bool
// nil hacks
setStart bool
setEnd bool
Transport http.RoundTripper
ctx Context
}
func (o *historyOpts) config() Config {
return *o.pubnub.Config
}
func (o *historyOpts) client() *http.Client {
return o.pubnub.GetClient()
}
func (o *historyOpts) context() Context {
return o.ctx
}
func (o *historyOpts) validate() error {
if o.config().SubscribeKey == "" {
return newValidationError(o, StrMissingSubKey)
}
if o.Channel == "" {
return newValidationError(o, StrMissingChannel)
}
return nil
}
func (o *historyOpts) buildPath() (string, error) {
return fmt.Sprintf(historyPath,
o.pubnub.Config.SubscribeKey,
utils.URLEncode(o.Channel)), nil
}
func (o *historyOpts) buildQuery() (*url.Values, error) {
q := defaultQuery(o.pubnub.Config.UUID, o.pubnub.telemetryManager)
if o.setStart {
q.Set("start", strconv.FormatInt(o.Start, 10))
}
if o.setEnd {
q.Set("end", strconv.FormatInt(o.End, 10))
}
if o.Count > 0 && o.Count <= maxCount {
q.Set("count", strconv.Itoa(o.Count))
} else {
q.Set("count", "100")
}
q.Set("reverse", strconv.FormatBool(o.Reverse))
q.Set("include_token", strconv.FormatBool(o.IncludeTimetoken))
q.Set("include_meta", strconv.FormatBool(o.WithMeta))
SetQueryParam(q, o.QueryParam)
return q, nil
}
func (o *historyOpts) jobQueue() chan *JobQItem {
return o.pubnub.jobQueue
}
func (o *historyOpts) buildBody() ([]byte, error) {
return []byte{}, nil
}
func (o *historyOpts) httpMethod() string {
return "GET"
}
func (o *historyOpts) isAuthRequired() bool {
return true
}
func (o *historyOpts) requestTimeout() int {
return o.pubnub.Config.NonSubscribeRequestTimeout
}
func (o *historyOpts) connectTimeout() int {
return o.pubnub.Config.ConnectTimeout
}
func (o *historyOpts) operationType() OperationType {
return PNHistoryOperation
}
func (o *historyOpts) telemetryManager() *TelemetryManager {
return o.pubnub.telemetryManager
}
// HistoryResponse is used to store the response from the History request.
type HistoryResponse struct {
Messages []HistoryResponseItem
StartTimetoken int64
EndTimetoken int64
}
// HistoryResponseItem is used to store the Message and the associated timetoken from the History request.
type HistoryResponseItem struct {
Message interface{}
Meta interface{}
Timetoken int64
}
func logAndCreateNewResponseParsingError(o *historyOpts, err error, jsonBody string, message string) *pnerr.ResponseParsingError {
o.pubnub.Config.Log.Println(err.Error())
e := pnerr.NewResponseParsingError(message,
ioutil.NopCloser(bytes.NewBufferString(jsonBody)), err)
return e
}
func getHistoryItemsWithoutTimetoken(historyResponseRaw []byte, o *historyOpts, err1 error, jsonBytes []byte) ([]HistoryResponseItem, *pnerr.ResponseParsingError) {
var historyResponseItems []interface{}
err0 := json.Unmarshal(historyResponseRaw, &historyResponseItems)
if err0 != nil {
e := logAndCreateNewResponseParsingError(o, fmt.Errorf("%e, %e, %s", err0, err1, string(jsonBytes)), string(jsonBytes), "Error unmarshalling response")
return nil, e
}
items := make([]HistoryResponseItem, len(historyResponseItems))
for i, v := range historyResponseItems {
o.pubnub.Config.Log.Println(v)
items[i].Message, _ = parseCipherInterface(v, o.pubnub.Config)
}
return items, nil
}
func getHistoryItemsWithTimetoken(historyResponseItems []HistoryResponseItem, o *historyOpts, historyResponseRaw []byte, jsonBytes []byte) ([]HistoryResponseItem, *pnerr.ResponseParsingError) {
items := make([]HistoryResponseItem, len(historyResponseItems))
b := false
for i, v := range historyResponseItems {
if v.Message != nil {
o.pubnub.Config.Log.Println(v.Message)
items[i].Message, _ = parseCipherInterface(v.Message, o.pubnub.Config)
o.pubnub.Config.Log.Println(v.Timetoken)
items[i].Timetoken = v.Timetoken
o.pubnub.Config.Log.Println(v.Meta)
items[i].Meta = v.Meta
} else {
b = true
break
}
}
if b {
items, e := getHistoryItemsWithoutTimetoken(historyResponseRaw, o, nil, jsonBytes)
return items, e
}
return items, nil
}
func newHistoryResponse(jsonBytes []byte, o *historyOpts,
status StatusResponse) (*HistoryResponse, StatusResponse, error) {
resp := &HistoryResponse{}
var historyResponseRaw []json.RawMessage
err := json.Unmarshal(jsonBytes, &historyResponseRaw)
if err != nil {
e := logAndCreateNewResponseParsingError(o, err, string(jsonBytes), "Error unmarshalling response")
return emptyHistoryResp, status, e
}
if historyResponseRaw != nil && len(historyResponseRaw) > 2 {
o.pubnub.Config.Log.Println("M", string(historyResponseRaw[0]))
o.pubnub.Config.Log.Println("T1", string(historyResponseRaw[1]))
o.pubnub.Config.Log.Println("T2", string(historyResponseRaw[2]))
var historyResponseItems []HistoryResponseItem
var items []HistoryResponseItem
err1 := json.Unmarshal(historyResponseRaw[0], &historyResponseItems)
var e *pnerr.ResponseParsingError
if err1 != nil {
o.pubnub.Config.Log.Println(err1.Error())
items, e = getHistoryItemsWithoutTimetoken(historyResponseRaw[0], o, err1, jsonBytes)
if e != nil {
return emptyHistoryResp, status, e
}
} else {
items, e = getHistoryItemsWithTimetoken(historyResponseItems, o, historyResponseRaw[0], jsonBytes)
if e != nil {
return emptyHistoryResp, status, e
}
}
if items != nil {
resp.Messages = items
o.pubnub.Config.Log.Printf("returning []interface, %v\n", items)
} else {
o.pubnub.Config.Log.Println("items nil")
}
startTimetoken, err := strconv.ParseInt(string(historyResponseRaw[1]), 10, 64)
if err == nil {
resp.StartTimetoken = startTimetoken
}
endTimetoken, err := strconv.ParseInt(string(historyResponseRaw[2]), 10, 64)
if err == nil {
resp.EndTimetoken = endTimetoken
}
} else if historyResponseRaw != nil && len(historyResponseRaw) > 0 {
e := logAndCreateNewResponseParsingError(o, err, string(jsonBytes), "Error unmarshalling response")
return emptyHistoryResp, status, e
} else {
e := logAndCreateNewResponseParsingError(o, err, string(jsonBytes), "Error unmarshalling response")
return emptyHistoryResp, status, e
}
return resp, status, nil
}