Provide minimal support for Windows (fix #146)

Make both platform-dependant 'gio-unix-2.0' and 'gio-windows-2.0'
dependencies optional and use features accordingly via 'GIO_UNIX' and
'GIO_WINDOWS' definitions.

Use 'add_project_arguments' instead of 'vala_defines'

Disable '--socket' option if 'gio-unix-2.0' is not available.

For FastCGI, use 'GLib.Win32InputStream' and 'GLib.Win32OutputStream'
and gracefully fallback with basic I/O wrapper.

Add basic cross files to target 32 and 64 bit targets with MinGW.

cross/i686-w64-mingw32.txt

@@ -0,0 +1,11 @@
+[binaries]
+exe_wrapper = 'wine'
+c = '/usr/bin/i686-w64-mingw32-gcc'
+strip = '/usr/bin/i686-w64-mingw32-strip'
+pkgconfig = '/usr/bin/i686-w64-mingw32-pkg-config'
+
+[host_machine]
+system = 'windows'
+cpu_family = 'x86'
+cpu = 'i686'
+endian = 'little'

cross/x86_64-w64-mingw32.txt

@@ -0,0 +1,11 @@
+[binaries]
+exe_wrapper = 'wine'
+c = '/usr/bin/x86_64-w64-mingw32-gcc'
+strip = '/usr/bin/x86_64-w64-mingw32-strip'
+pkgconfig = '/usr/bin/x86_64-w64-mingw32-pkg-config'
+
+[host_machine]
+system = 'windows'
+cpu_family = 'x86_64'
+cpu = 'x86_64'
+endian = 'little'

docs/meson.build

@@ -4,7 +4,7 @@ if valadoc.found()
                        '--package-version', meson.project_version(), '--pkg=glib-2.0',
                        '--pkg=gio-2.0', '--pkg=gio-unix-2.0',
                        '--pkg=gmodule-2.0', '--pkg=libsoup-2.4', '--pkg=posix',
-                       '--target-glib=2.40', '--force'] + vala_defines + [ '--directory', '@OUTPUT@', '@INPUT@']
+                       '--target-glib=2.40', '--force', '--directory', '@OUTPUT@', '@INPUT@']
     custom_target('API documentation', command: valadoc_command + ['--doclet=html'],
                  input: vsgi_sources + valum_sources,
                  output: 'api')

meson.build

@@ -12,20 +12,33 @@ add_project_arguments(['--enable-experimental',
 glib = dependency('glib-2.0', version: '>=2.40')
 gobject = dependency('gobject-2.0', version: '>=2.40')
 gio = dependency('gio-2.0', version: '>=2.40')
-gio_unix = dependency('gio-unix-2.0', version: '>=2.40')
+gio_unix = dependency('gio-unix-2.0', version: '>=2.40', required: false)
+gio_windows = dependency('gio-windows-2.0', version: '>=2.40', required: false)
 gmodule = dependency('gmodule-2.0', version: '>=2.40')
 soup = dependency('libsoup-2.4', version: '>=2.44')
 
-vala_defines = []
-
 # provide 'OutputStream.write_all_async' and 'SimpleIOStream'
 if gio.version().version_compare('>=2.44')
-    vala_defines += '--define=GIO_2_44'
+    add_project_arguments('--define=GIO_2_44', language: 'vala')
+endif
+
+# provide 'UnixInputStream', 'UnixOutputStream' and 'UnixSocketAddress'
+if gio_unix.found()
+    add_project_arguments('--define=GIO_UNIX', language: 'vala')
+endif
+
+# provide 'Win32InputStream' and 'Win32OutputStream'
+if gio_windows.found()
+    add_project_arguments('--define=GIO_WINDOWS', language: 'vala')
 endif
 
 # new 'Soup.Server' API
 if soup.version().version_compare('>=2.48')
-    vala_defines += '--define=SOUP_2_48'
+    add_project_arguments('--define=SOUP_2_48', language: 'vala')
+endif
+
+if meson.get_compiler('c').has_function('fork')
+    add_project_arguments('--define=HAVE_FORK', language: 'vala')
 endif
 
 subdir('src')

src/valum/meson.build

@@ -25,7 +25,6 @@ valum_sources = files(
     'valum-subdomain.vala')
 valum_lib = library('valum-' + api_version, valum_sources,
                     dependencies: [glib, gobject, gio, soup, vsgi],
-                    vala_args: vala_defines,
                     vala_header: 'valum.h',
                     install: true)
 

src/vsgi/meson.build

@@ -17,8 +17,8 @@ vsgi_sources = files(
     'vsgi-socket-server.vala',
     'vsgi-tee-output-stream.vala')
 vsgi_lib = library('vsgi-' + api_version, vsgi_sources,
-                   dependencies: [glib, gobject, gio, gio_unix, gmodule, soup],
-                   vala_args: ['--pkg=posix'] + vala_defines,
+                   dependencies: [glib, gobject, gio, gio_unix, gio_windows, gmodule, soup],
+                   vala_args: ['--pkg=posix'],
                    vala_header: 'vsgi.h',
                    install: true,
                    install_rpath: '$ORIGIN/vsgi-@0@/servers'.format(api_version))
@@ -29,9 +29,19 @@ vsgi = declare_dependency(include_directories: include_directories('.'),
 
 meson.add_install_script('install.sh')
 
+vsgi_requires_private = ['gmodule-2.0']
+
+if gio_unix.found ()
+    vsgi_requires_private += 'gio-unix-2.0'
+endif
+
+if gio_windows.found()
+    vsgi_requires_private += 'gio-windows-2.0'
+endif
+
 pkgconfig = import('pkgconfig')
 pkgconfig.generate(requires: 'glib-2.0 gobject-2.0 gio-2.0 libsoup-2.4',
-                   requires_private: 'gio-unix-2.0 gmodule-2.0',
+                   requires_private: vsgi_requires_private,
                    libraries: vsgi_lib,
                    version: meson.project_version(),
                    name: 'VSGI',

src/vsgi/servers/meson.build

@@ -1,27 +1,23 @@
 shared_library('vsgi-http', ['vsgi-http.vala'],
         dependencies: [glib, gobject, gio, soup, vsgi],
-        vala_args: vala_defines,
         install: true,
         install_dir: '@0@/vsgi-@1@/servers'.format(get_option('libdir'), api_version))
 
 shared_library('vsgi-cgi', 'vsgi-cgi.vala',
-        dependencies: [glib, gobject, gio, gio_unix, soup, vsgi],
-        vala_args: vala_defines,
+        dependencies: [glib, gobject, gio, gio_unix, gio_windows, soup, vsgi],
         install: true,
         install_dir: '@0@/vsgi-@1@/servers'.format(get_option('libdir'), api_version))
 
 fcgi = meson.get_compiler('c').find_library('fcgi', required: false)
 if fcgi.found()
     fcgi_vapi = meson.get_compiler('vala').find_library('fcgi', dirs: meson.current_source_dir())
     shared_library('vsgi-fastcgi', 'vsgi-fastcgi.vala',
-                   dependencies: [glib, gobject, gio, gio_unix, soup, vsgi, fcgi, fcgi_vapi],
-                   vala_args: vala_defines,
+                   dependencies: [glib, gobject, gio, gio_unix, gio_windows, soup, vsgi, fcgi, fcgi_vapi],
                    install: true,
                    install_dir: '@0@/vsgi-@1@/servers'.format(get_option('libdir'), api_version))
 endif
 
 shared_library('vsgi-scgi', 'vsgi-scgi.vala',
         dependencies: [glib, gobject, gio, soup, vsgi],
-        vala_args: vala_defines,
         install: true,
         install_dir: '@0@/vsgi-@1@/servers'.format(get_option('libdir'), api_version))

src/vsgi/servers/vsgi-cgi.vala

@@ -71,11 +71,25 @@ namespace VSGI.CGI {
 			}
 
 #if GIO_2_44
+#if GIO_UNIX
 			var connection = new SimpleIOStream (new UnixInputStream (stdin.fileno (), true),
 			                                     new UnixOutputStream (stdout.fileno (), true));
+#elif GIO_WINDOWS
+			var connection = new SimpleIOStream (new Win32InputStream (stdin, true),
+			                                     new Win32OutputStream (stdout, true));
 #else
+			throw new IOError.NOT_SUPPORTED ("Support for system-dependant I/O stream is missing.");
+#endif
+#else
+#if GIO_UNIX
 			var connection = new Connection (new UnixInputStream (stdin.fileno (), true),
 			                                 new UnixOutputStream (stdout.fileno (), true));
+#elif GIO_WINDOWS
+			var connection = new Connection (new Win32InputStream (stdin, true),
+			                                 new Win32OutputStream (stdout, true));
+#else
+			throw new IOError.NOT_SUPPORTED ("Support for system-dependant I/O stream is missing.");
+#endif
 #endif
 
 			var req = new Request.from_cgi_environment (connection, Environ.@get ());
@@ -100,12 +114,5 @@ namespace VSGI.CGI {
 		public override void stop () {
 			// CGI handle a single connection
 		}
-
-		/**
-		 * Forking does not make sense for CGI.
-		 */
-		public override Pid fork () {
-			return 0;
-		}
 	}
 }

src/vsgi/servers/vsgi-fastcgi.vala

@@ -51,13 +51,31 @@ namespace VSGI.FastCGI {
 		return "Unknown error code '%d'".printf (error);
 	}
 
-	private class StreamInputStream : UnixInputStream {
+	private class StreamInputStream :
+#if GIO_UNIX
+		UnixInputStream
+#elif GIO_WINDOWS
+		Win32InputStream
+#else
+		InputStream
+#endif
+	{
 
 		public unowned global::FastCGI.Stream @in { construct; get; }
 
+#if GIO_UNIX
 		public StreamInputStream (int fd, global::FastCGI.Stream @in) {
 			Object (fd: fd, close_fd: false, @in: @in);
 		}
+#elif GIO_WINDOWS
+		public StreamInputStream (void* handle, global::FastCGI.Stream @in) {
+			Object (handle: handle, close_handle: false, @in: @in);
+		}
+#else
+		public StreamInputStream (global::FastCGI.Stream @in) {
+			Object (@in: @in);
+		}
+#endif
 
 		public override ssize_t read (uint8[] buffer, Cancellable? cancellable = null) throws IOError {
 			var read = this.in.read (buffer);
@@ -80,15 +98,33 @@ namespace VSGI.FastCGI {
 		}
 	}
 
-	private class StreamOutputStream : UnixOutputStream {
+	private class StreamOutputStream :
+#if GIO_UNIX
+		UnixOutputStream
+#elif GIO_WINDOWS
+		Win32OutputStream
+#else
+		OutputStream
+#endif
+	{
 
 		public unowned global::FastCGI.Stream @out { construct; get; }
 
 		public unowned global::FastCGI.Stream err { construct; get; }
 
+#if GIO_UNIX
 		public StreamOutputStream (int fd, global::FastCGI.Stream @out, global::FastCGI.Stream err) {
 			Object (fd: fd, close_fd: false, @out: @out, err: err);
 		}
+#elif GIO_WINDOWS
+		public StreamOutputStream (void* handle, global::FastCGI.Stream @out, global::FastCGI.Stream err) {
+			Object (handle: handle, close_handle: false, @out: @out, err: err);
+		}
+#else
+		public StreamOutputStream (global::FastCGI.Stream @out, global::FastCGI.Stream err) {
+			Object (@out: @out, err: err);
+		}
+#endif
 
 		public override ssize_t write (uint8[] buffer, Cancellable? cancellable = null) throws IOError {
 			var written = this.out.put_str (buffer);
@@ -165,7 +201,10 @@ namespace VSGI.FastCGI {
 			if (address == null) {
 				fd = global::FastCGI.LISTENSOCK_FILENO;
 				_uris.append (new Soup.URI ("fcgi+fd://%d/".printf (fd)));
-			} else if (address is UnixSocketAddress) {
+			}
+
+#if GIO_UNIX
+			else if (address is UnixSocketAddress) {
 				var socket_address = address as UnixSocketAddress;
 
 				fd = global::FastCGI.open_socket (socket_address.path, backlog);
@@ -175,7 +214,10 @@ namespace VSGI.FastCGI {
 				}
 
 				_uris.append (new Soup.URI ("fcgi+unix://%s/".printf (socket_address.path)));
-			} else if (address is InetSocketAddress) {
+			}
+#endif
+
+			else if (address is InetSocketAddress) {
 				var inet_address = address as InetSocketAddress;
 
 				if (inet_address.get_family () == SocketFamily.IPV6) {
@@ -287,8 +329,16 @@ namespace VSGI.FastCGI {
 
 				yield;
 
-				this._input_stream  = new StreamInputStream (fd, request.in);
-				this._output_stream = new StreamOutputStream (fd, request.out, request.err);
+#if GIO_UNIX
+				_input_stream  = new StreamInputStream (fd, request.in);
+				_output_stream = new StreamOutputStream (fd, request.out, request.err);
+#elif GIO_WINDOWS
+				_input_stream  = new StreamInputStream ((void*) fd, request.in);
+				_output_stream = new StreamOutputStream ((void*) fd, request.out, request.err);
+#else
+				_input_stream  = new StreamInputStream (request.in);
+				_output_stream = new StreamOutputStream (request.out, request.err);
+#endif
 
 				return true;
 			}

src/vsgi/vsgi-application.vala

@@ -49,8 +49,10 @@ public class VSGI.Application : GLib.Application {
 			{"any",             'A', 0, OptionArg.NONE,           null, "Listen on any address instead of only from the loopback interface"},
 			{"ipv4-only",       '4', 0, OptionArg.NONE,           null, "Listen only to IPv4 interfaces"},
 			{"ipv6-only",       '6', 0, OptionArg.NONE,           null, "Listen only to IPv6 interfaces"},
+#if GIO_UNIX
 			// socket
 			{"socket",          's', 0, OptionArg.FILENAME_ARRAY, null, "Listen on each UNIX socket paths",     "[]"},
+#endif
 			// file descriptor
 			{"file-descriptor", 'f', 0, OptionArg.STRING_ARRAY,   null, "Listen on each file descriptors",      "[]"},
 			{null}
@@ -91,7 +93,9 @@ public class VSGI.Application : GLib.Application {
 			var any       = options.lookup_value ("any",             VariantType.BOOLEAN);
 			var ipv4_only = options.lookup_value ("ipv4-only",       VariantType.BOOLEAN);
 			var ipv6_only = options.lookup_value ("ipv6-only",       VariantType.BOOLEAN);
+#if GIO_UNIX
 			var sockets   = options.lookup_value ("socket",          VariantType.BYTESTRING_ARRAY);
+#endif
 			var fds       = options.lookup_value ("file-descriptor", VariantType.STRING_ARRAY);
 
 			if (addresses != null) {
@@ -144,12 +148,14 @@ public class VSGI.Application : GLib.Application {
 				}
 			}
 
+#if GIO_UNIX
 			// socket path
 			if (sockets != null) {
 				foreach (var socket in sockets.get_bytestring_array ()) {
 					server.listen (new UnixSocketAddress (socket));
 				}
 			}
+#endif
 
 			// file descriptor
 			if (fds != null) {
@@ -164,7 +170,12 @@ public class VSGI.Application : GLib.Application {
 			}
 
 			// default listening interface
-			if (addresses == null && ports == null && sockets == null && fds == null) {
+			if (addresses == null &&
+			    ports     == null &&
+#if GIO_UNIX
+			    sockets   == null &&
+#endif
+			    fds       == null) {
 				server.listen ();
 			}
 
@@ -173,44 +184,21 @@ public class VSGI.Application : GLib.Application {
 			return 1;
 		}
 
-		if (options.lookup_value ("forks", VariantType.INT32) != null) {
-			var forks = options.lookup_value ("forks", VariantType.INT32).get_int32 ();
-			try {
-				for (var i = 0; i < forks; i++) {
-					var pid = server.fork ();
-
-					// worker
-					if (pid == 0) {
-						break;
-					}
-
-					// parent
-					else {
-						// monitor child process
-						ChildWatch.add (pid, (pid, status) => {
-							warning ("Worker %d exited with status '%d'.", pid, status);
-						});
-					}
-				}
-			} catch (Error err) {
-				critical ("%s (%s, %d)", err.message, err.domain.to_string (), err.code);
-				return 1;
-			}
-		}
-
 		foreach (var uri in server.uris) {
 			message ("Listening on '%s'.", uri.to_string (false));
 		}
 
 		// keep the process (and workers) alive
 		hold ();
 
+#if GIO_UNIX
 		// release on 'SIGTERM'
 		Unix.signal_add (ProcessSignal.TERM, () => {
 			release ();
 			server.stop ();
 			return false;
 		}, Priority.LOW);
+#endif
 
 		return 0;
 	}