mirror of https://github.com/knative/docs.git
79 lines
2.0 KiB
Go
79 lines
2.0 KiB
Go
/*
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Copyright 2018 The Knative Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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https://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package main
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import (
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"encoding/base64"
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"encoding/json"
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"io/ioutil"
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"log"
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"net/http"
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)
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// Event represents PubSub payload
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type Event struct {
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ID string `json:"ID"`
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Data string `json:"Data"`
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Attributes map[string]string `json:"Attributes"`
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}
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// EventPayload represents PubSub Data payload
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type EventPayload struct {
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ID string `json:"event_id"`
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SourceID string `json:"source_id"`
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SentOn int `json:"event_ts"`
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Metric int `json:"metric"`
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}
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func handlePost(rw http.ResponseWriter, req *http.Request) {
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body, err := ioutil.ReadAll(req.Body)
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if err != nil {
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panic(err)
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}
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//log.Println(string(body))
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// decode the pubsub message
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// var event map[string]string
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var event Event
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if err := json.Unmarshal(body, &event); err != nil {
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log.Printf("Failed to unmarshal event: %s", err)
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return
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}
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// decode pubsub payload
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rawEvent, _ := base64.StdEncoding.DecodeString(event.Data)
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// decode iot data
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data, _ := base64.StdEncoding.DecodeString(string(rawEvent))
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// decode the pubsub message payload
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var payload EventPayload
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if err := json.Unmarshal(data, &payload); err != nil {
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log.Printf("Failed to unmarshal payload: %s", err)
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return
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}
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log.Printf("Data sent by device %q: [metric: %d, on: %v]",
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event.Attributes["deviceId"], payload.Metric, payload.SentOn)
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}
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func main() {
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http.HandleFunc("/", handlePost)
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log.Fatal(http.ListenAndServe(":8080", nil))
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}
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