56 lines
1.6 KiB
Go
56 lines
1.6 KiB
Go
package writer
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import (
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"bbb-graphql-middleware/internal/common"
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"bytes"
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"encoding/json"
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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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browserConnection *common.BrowserConnection,
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wg *sync.WaitGroup) {
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defer browserConnection.Logger.Debugf("finished")
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browserConnection.Logger.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 <-browserConnection.Context.Done():
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browserConnection.Logger.Debug("Browser context cancelled.")
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break RangeLoop
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case toBrowserMessage := <-browserConnection.FromHasuraToBrowserChannel.ReceiveChannel():
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{
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if toBrowserMessage == nil {
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if browserConnection.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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browserConnection.Logger.Tracef("sending to browser: %s", string(toBrowserMessage))
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err := browserConnection.Websocket.Write(browserConnection.Context, websocket.MessageText, toBrowserMessage)
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if err != nil {
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browserConnection.Logger.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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_ = browserConnection.Websocket.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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