From b8e0146a3c3de594f150356f42cfdb95064d62d3 Mon Sep 17 00:00:00 2001
From: reuk <reuk@users.noreply.github.com>
Date: Mon, 16 Jun 2025 15:48:58 +0100
Subject: [PATCH] Network: Make Linux networking code robust against user
 headers that already end with CRLF

---
 modules/juce_core/native/juce_Network_linux.cpp | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/modules/juce_core/native/juce_Network_linux.cpp b/modules/juce_core/native/juce_Network_linux.cpp
index bdfe150a2a..71d1983fce 100644
--- a/modules/juce_core/native/juce_Network_linux.cpp
+++ b/modules/juce_core/native/juce_Network_linux.cpp
@@ -537,7 +537,16 @@ private:
         if (userHeaders.isNotEmpty())
             header << "\r\n" << userHeaders;
 
-        header << "\r\n\r\n";
+        const auto headerHasCompleteSuffix = [&header]
+        {
+            const auto actualEnd = static_cast<const char*> (header.getData()) + header.getDataSize();
+            const auto actualBegin = actualEnd - jmin (header.getDataSize(), (size_t) 4);
+            const char expected[] { '\r', '\n', '\r', '\n' };
+            return std::equal (actualBegin, actualEnd, std::begin (expected), std::end (expected));
+        };
+
+        while (! headerHasCompleteSuffix())
+            header << "\r\n";
 
         if (hasPostData)
             header << postData;