Initial commit: mod_reqin_log Apache module

Features:
- JSON logging of HTTP requests to Unix domain socket
- Configurable HTTP headers logging (flat JSON structure)
- Header value truncation and count limits
- Automatic reconnect on socket disconnection
- Error reporting with throttling

Configuration directives:
- JsonSockLogEnabled: Enable/disable logging
- JsonSockLogSocket: Unix socket path
- JsonSockLogHeaders: List of headers to log
- JsonSockLogMaxHeaders: Maximum headers to log
- JsonSockLogMaxHeaderValueLen: Max header value length
- JsonSockLogReconnectInterval: Reconnect delay
- JsonSockLogErrorReportInterval: Error log throttle

Includes:
- Module source code (src/)
- Unit and integration tests (tests/, scripts/)
- Documentation (README.md, architecture.yml)
- Build configuration (CMakeLists.txt, Makefile)
- Packaging (deb/rpm)

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

packaging/rpm/mod_reqin_log.spec

@@ -0,0 +1,53 @@
+Name:           mod_reqin_log
+Version:        1.0.0
+Release:        1%{?dist}
+Summary:        Apache HTTPD module for logging HTTP requests as JSON to Unix socket
+
+License:        Apache-2.0
+URL:            https://github.com/example/mod_reqin_log
+Source0:        %{name}-%{version}.tar.gz
+
+BuildRequires:  gcc
+BuildRequires:  make
+BuildRequires:  httpd
+BuildRequires:  httpd-devel
+BuildRequires:  apr-devel
+BuildRequires:  apr-util-devel
+
+Requires:       httpd
+
+%description
+mod_reqin_log is an Apache HTTPD 2.4 module that logs all incoming HTTP requests
+as JSON lines to a Unix domain socket. The logging occurs at request reception
+time (post_read_request phase), capturing input-side data without waiting for
+application processing.
+
+Features:
+- Non-blocking I/O to avoid stalling worker processes
+- Configurable header logging with truncation support
+- Automatic reconnection to Unix socket on failure
+- Throttled error reporting to Apache error_log
+- Compatible with prefork, worker, and event MPMs
+
+%prep
+%setup -q
+
+%build
+%{__make} %{?_smp_mflags} APXS=%{_bindir}/apxs
+
+%install
+%{__make} install DESTDIR=%{buildroot} APXS=%{_bindir}/apxs
+
+# Install configuration file
+mkdir -p %{buildroot}%{_sysconfdir}/httpd/conf.d
+install -m 644 conf/mod_reqin_log.conf %{buildroot}%{_sysconfdir}/httpd/conf.d/
+
+%files
+%{_libdir}/httpd/modules/mod_reqin_log.so
+%config(noreplace) %{_sysconfdir}/httpd/conf.d/mod_reqin_log.conf
+%doc README.md
+%license LICENSE
+
+%changelog
+* Thu Feb 26 2026 Developer <dev@example.com> - 1.0.0-1
+- Initial package release