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ws.go
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ws.go
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package dappEngine
import (
"encoding/json"
"fmt"
"gx/ipfs/QmZH5VXfAJouGMyCCHTRPGCT3e5MG9Lu78Ln3YAYW1XTts/websocket"
"net/http"
"sync"
)
type stack struct {
lock sync.Mutex
requests map[string]request
}
type request struct {
ID string `json:"id"`
Body map[string]interface{} `json:"body"`
closer chan struct{}
}
type response struct {
ID string `json:"id"`
}
func wsHandler(w http.ResponseWriter, r *http.Request) {
conn, err := websocket.Upgrade(w, r, w.Header(), 1024, 1024)
if err != nil {
http.Error(w, "Could not open websocket connection", http.StatusBadRequest)
}
sta := stack{
lock: sync.Mutex{},
requests: map[string]request{},
}
// write logic
go func() {
for {
select {
case request := <-sendChan:
sta.lock.Lock()
sta.requests[request.ID] = request
sta.lock.Unlock()
raw, err := json.Marshal(request)
if err != nil {
fmt.Println(err)
}
conn.WriteJSON(string(raw))
}
}
}()
// read logic
go func() {
for {
req := response{}
err := conn.ReadJSON(&req)
if err != nil {
fmt.Println("Error reading json.", err)
}
sta.lock.Lock()
request := sta.requests[req.ID]
request.closer <- struct{}{}
sta.lock.Unlock()
}
}()
}