Make websockets stop panicking about buggy clients

main.go

@@ -1,7 +1,6 @@
 package main
 
 import (
-	"errors"
 	"log"
 	"os"
 	"strconv"
@@ -358,14 +357,14 @@ func main() {
 		// Kick over to a WebSocket
 		conn, err := upgrade.Upgrade(c.Writer, c.Request, nil)
 		if err != nil {
-			panic("Error upgrading connection: " + err.Error())
+			println("Error upgrading connection: " + err.Error())
 		}
 
 		// Create a new nonce
 		nonce := make([]byte, 16)
 		_, err = rand.Read(nonce)
 		if err != nil {
-			panic("Error generating nonce: " + err.Error())
+			println("Error generating nonce: " + err.Error())
 		}
 
 		// Base64 encode the nonce
@@ -381,7 +380,7 @@ func main() {
 					"error": "Did not respond to nonce",
 				})
 				if err != nil {
-					panic("Error writing back to WebSocket: " + err.Error())
+					return
 				}
 			}
 		}()
@@ -397,11 +396,7 @@ func main() {
 
 		_, nonceResponse, err := conn.ReadMessage()
 		if err != nil {
-			if !errors.Is(err, websocket.ErrCloseSent) {
-				panic("Error reading nonce response: " + err.Error())
-			} else {
-				return
-			}
+			return
 		}
 
 		read = true
@@ -409,7 +404,7 @@ func main() {
 		jsonResponse := make(map[string]interface{})
 		err = json.Unmarshal(nonceResponse, &jsonResponse)
 		if err != nil {
-			panic("Error unmarshalling nonce response: " + err.Error())
+			println("Error unmarshalling nonce response: " + err.Error())
 		}
 
 		heartbeatStop := make(chan struct{})
@@ -422,12 +417,12 @@ func main() {
 					// Write back to the WebSocket
 					err = conn.WriteJSON(gin.H{"type": "success"})
 					if err != nil {
-						panic("Error writing back to WebSocket: " + err.Error())
+						return
 					}
 
 					err = conn.Close()
 					if err != nil {
-						panic("Error closing WebSocket: " + err.Error())
+						return
 					}
 
 					// Tell the heartbeat loop to stop
@@ -458,7 +453,7 @@ func main() {
 							"error": "Did not respond to ping",
 						})
 						if err != nil {
-							panic("Error writing back to WebSocket: " + err.Error())
+							return
 						}
 					}
 				}()