From f0977c9319f0b1ff48cbceabea99946e6518a383 Mon Sep 17 00:00:00 2001
From: Dorian Niemiec <dorian.niemiec@svrjs.org>
Date: Wed, 21 Feb 2024 00:49:44 +0100
Subject: [PATCH] Prevented "write after end" SVR.JS crashes

---
 index.js | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/index.js b/index.js
index 74693ed..6ae3343 100644
--- a/index.js
+++ b/index.js
@@ -166,7 +166,11 @@ function createFastCGIHandler(options) {
     var processedPacket = parseFastCGIPacket(packet);
     if (processedPacket.requestID != requestID) return; //Drop the packet
     if (processedPacket.type == STDOUT) {
-      if(processedPacket.content.length > 0) emulatedStdout.push(processedPacket.content);
+      try {
+        if(processedPacket.content.length > 0) emulatedStdout.push(processedPacket.content);
+      } catch (err) {
+        //STDOUT will be lost instead of crashing the server
+      }
     } else if (processedPacket.type == STDERR) {
       try {
         if(processedPacket.content.length > 0) emulatedStderr.push(processedPacket.content);
@@ -189,7 +193,7 @@ function createFastCGIHandler(options) {
           err = new Error("Multiplexed connections not supported by the FastCGI application");
         }
         emulatedStdout.push(null);
-        if (emulatedStdout._readableState && emulatedStdout._readableState.length > 0 && emulatedStdout._readableState.flowing !== null) {
+        if (emulatedStdout._readableState && emulatedStdout._readableState.length > 0 && emulatedStdout._readableState.flowing !== null && !emulatedStdout.endEmitted) {
           emulatedStdout.on("end", function() {
             emulatedStderr.push(null);
             eventEmitter.emit("error", err);
@@ -200,7 +204,7 @@ function createFastCGIHandler(options) {
         }
       } else {
         emulatedStdout.push(null);
-        if (emulatedStdout._readableState && emulatedStdout._readableState.length > 0 && emulatedStdout._readableState.flowing !== null) {
+        if (emulatedStdout._readableState && emulatedStdout._readableState.length > 0 && emulatedStdout._readableState.flowing !== null && !emulatedStdout.endEmitted) {
           emulatedStdout.on("end", function() {
             emulatedStderr.push(null);
             eventEmitter.emit("exit", appStatus, null);