62 lines
1.6 KiB
Go
62 lines
1.6 KiB
Go
package writer
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import (
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"bytes"
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"context"
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"encoding/json"
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"github.com/iMDT/bbb-graphql-middleware/internal/common"
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log "github.com/sirupsen/logrus"
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"nhooyr.io/websocket"
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"sync"
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)
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func BrowserConnectionWriter(
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browserConnectionId string,
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ctx context.Context,
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browserWsConn *websocket.Conn,
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fromHasuraToBrowserChannel *common.SafeChannelByte,
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wg *sync.WaitGroup) {
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log := log.WithField("_routine", "BrowserConnectionWriter").WithField("browserConnectionId", browserConnectionId)
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defer log.Debugf("finished")
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log.Debugf("starting")
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defer wg.Done()
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RangeLoop:
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for {
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select {
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case <-ctx.Done():
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log.Debug("Browser context cancelled.")
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break RangeLoop
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case toBrowserMessage := <-fromHasuraToBrowserChannel.ReceiveChannel():
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{
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if toBrowserMessage == nil {
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if fromHasuraToBrowserChannel.Closed() {
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break RangeLoop
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}
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continue
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}
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log.Tracef("sending to browser: %v", toBrowserMessage)
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err := browserWsConn.Write(ctx, websocket.MessageText, toBrowserMessage)
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if err != nil {
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log.Debugf("Browser is disconnected, skipping writing of ws message: %v", err)
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return
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}
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// After the error is sent to client, close its connection
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// Authentication hook unauthorized this request
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if bytes.Contains(toBrowserMessage, []byte("connection_error")) {
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type HasuraMessage struct {
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Type string `json:"type"`
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}
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var hasuraMessage HasuraMessage
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_ = json.Unmarshal(toBrowserMessage, &hasuraMessage)
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if hasuraMessage.Type == "connection_error" {
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_ = browserWsConn.Close(websocket.StatusInternalError, string(toBrowserMessage))
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}
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}
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}
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}
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}
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}
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