-
Notifications
You must be signed in to change notification settings - Fork 1
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Add HTTP station data publisher in ESPEasy JSON format
- Loading branch information
Showing
5 changed files
with
215 additions
and
52 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,6 +1,7 @@ | ||
| # Folders | ||
| _test/ | ||
| bin/ | ||
| .vscode/ | ||
|
|
||
| # IDE files | ||
| *.iml | ||
|
|
||
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,99 @@ | ||
| // Copyright © 2022 Victor Antonovich <[email protected]> | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package main | ||
|
|
||
| import ( | ||
| "context" | ||
| "encoding/json" | ||
| "fmt" | ||
| "net/http" | ||
| "sync" | ||
| "time" | ||
|
|
||
| log "github.com/sirupsen/logrus" | ||
| ) | ||
|
|
||
| type Publisher interface { | ||
| Start() error | ||
| Stop() | ||
| Publish(data *StationData) | ||
| } | ||
|
|
||
| type HttpPublisher struct { | ||
| sync.Mutex | ||
|
|
||
| port int | ||
|
|
||
| server *http.Server | ||
| serverStopWg *sync.WaitGroup | ||
|
|
||
| lastData *StationData | ||
| } | ||
|
|
||
| func NewHttpPublisher(port int) *HttpPublisher { | ||
| return &HttpPublisher{ | ||
| port: port, | ||
| } | ||
| } | ||
|
|
||
| func (hp *HttpPublisher) Start() error { | ||
| log.Printf("starting sensor data HTTP publisher at http://0.0.0.0:%d/json", hp.port) | ||
| mux := http.NewServeMux() | ||
| mux.HandleFunc("/json", func(w http.ResponseWriter, r *http.Request) { | ||
| if hp.lastData == nil { | ||
| w.WriteHeader(503) | ||
| return | ||
| } | ||
| ld := hp.lastData | ||
| ep := NewEspData(ld.LastMeasurement, ld.Uptime, ld.Version) | ||
| jd, err := json.Marshal(ep) | ||
| if err != nil { | ||
| w.WriteHeader(500) | ||
| w.Write([]byte(err.Error())) | ||
| return | ||
| } | ||
| w.WriteHeader(200) | ||
| w.Header().Set("Content-Type", "application/json") | ||
| w.Write(jd) | ||
| }) | ||
| hp.server = &http.Server{Addr: fmt.Sprintf(":%d", hp.port), Handler: mux} | ||
| hp.serverStopWg = &sync.WaitGroup{} | ||
| hp.serverStopWg.Add(1) | ||
| go func() { | ||
| defer hp.serverStopWg.Done() | ||
| if err := hp.server.ListenAndServe(); err != http.ErrServerClosed { | ||
| log.Errorf("can't start sensor data HTTP publisher: %v", err) | ||
| } | ||
| }() | ||
| return nil | ||
| } | ||
|
|
||
| func (hp *HttpPublisher) Stop() { | ||
| log.Print("stopping sensor data HTTP publisher...") | ||
| ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second) | ||
| defer cancel() | ||
| if err := hp.server.Shutdown(ctx); err != nil { | ||
| log.Errorf("error while stopping sensor data HTTP server: %v", err) | ||
| } | ||
| hp.serverStopWg.Wait() | ||
| log.Print("sensor data HTTP publisher stopped") | ||
| } | ||
|
|
||
| func (hp *HttpPublisher) Publish(data *StationData) { | ||
| lastData := *data | ||
| hp.Lock() | ||
| defer hp.Unlock() | ||
| hp.lastData = &lastData | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters