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[gnio/connection-factory] Add http server example

commit 5cf0e62e2761c3822af3eb251001a76d324a8020
Author: Alexander Larsson <alexl redhat com>
Date:   Mon May 11 14:59:23 2009 +0200

    Add http server example
---
 examples/Makefile.am |    5 +-
 examples/httpd.c     |  185 ++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 189 insertions(+), 1 deletions(-)

diff --git a/examples/Makefile.am b/examples/Makefile.am
index b686ac1..6196a29 100644
--- a/examples/Makefile.am
+++ b/examples/Makefile.am
@@ -1,4 +1,4 @@
-noinst_PROGRAMS = server
+noinst_PROGRAMS = server httpd
 
 if HAVE_GNUTLS
 noinst_PROGRAMS += client
@@ -8,6 +8,9 @@ AM_CFLAGS = $(gio_CFLAGS) -I$(top_srcdir) -Wall -Wmissing-prototypes
 server_LDADD = ../gio/libgnio.la $(gthread_LIBS)
 server_SOURCES = server.c
 
+httpd_LDADD = ../gio/libgnio.la $(gthread_LIBS)
+httpd_SOURCES = httpd.c
+
 if HAVE_GNUTLS
 client_LDADD = ../gio/libgnio.la
 client_SOURCES = client.c
diff --git a/examples/httpd.c b/examples/httpd.c
new file mode 100644
index 0000000..eff6204
--- /dev/null
+++ b/examples/httpd.c
@@ -0,0 +1,185 @@
+#include <gio/gnio.h>
+#include <string.h>
+
+static int port = 8080;
+static char *root = NULL;
+static GOptionEntry cmd_entries[] = {
+  {"port", 'p', 0, G_OPTION_ARG_INT, &port,
+   "Local port to bind to", NULL},
+  {NULL}
+};
+
+static void
+send_error (GOutputStream *out,
+	    int error_code,
+	    char *reason)
+{
+  char *res;
+
+  res = g_strdup_printf ("HTTP/1.0 %d %s\r\n\r\n"
+			 "<html><head><title>%d %s</title></head>"
+			 "<body>%s</body></html>",
+			 error_code, reason,
+			 error_code, reason,
+			 reason);
+  g_output_stream_write_all (out, res, strlen (res), NULL, NULL, NULL);
+  g_free (res);
+}
+
+static gboolean
+handler (GThreadedSocketService *service,
+	 GSocketConnection      *connection,
+	 GSocketListener        *listener,
+	 gpointer                user_data)
+{
+  GOutputStream *out;
+  GInputStream *in;
+  GFileInputStream *file_in;
+  GDataInputStream *data;
+  char *line, *escaped, *tmp, *query, *unescaped, *path, *version;
+  GFile *f;
+  GError *error;
+  GFileInfo *info;
+  GString *s;
+
+  in = g_io_stream_get_input_stream (G_IO_STREAM (connection));
+  out = g_io_stream_get_output_stream (G_IO_STREAM (connection));
+
+  data = g_data_input_stream_new (in);
+  /* Be tolerant of input */
+  g_data_input_stream_set_newline_type (data, G_DATA_STREAM_NEWLINE_TYPE_ANY);
+
+  line = g_data_input_stream_read_line (data, NULL, NULL, NULL);
+
+  if (line == NULL)
+    {
+      send_error (out, 400, "Invalid request");
+      goto out;
+    }
+
+  if (!g_str_has_prefix (line, "GET "))
+    {
+      send_error (out, 501, "Only GET implemented");
+      goto out;
+    }
+
+  escaped = line + 4; /* Skip "GET " */
+
+  version = NULL;
+  tmp = strchr (escaped, ' ');
+  if (tmp != NULL)
+    {
+      *tmp = 0;
+      version = tmp + 1;
+    }
+
+  query = strchr (escaped, '?');
+  if (query != NULL)
+    *query++ = 0;
+
+  unescaped = g_uri_unescape_string (escaped, NULL);
+  path = g_build_filename (root, unescaped, NULL);
+  g_free (unescaped);
+  f = g_file_new_for_path (path);
+  g_free (path);
+
+  error = NULL;
+  file_in = g_file_read (f, NULL, &error);
+  if (file_in == NULL)
+    {
+      send_error (out, 404, error->message);
+      g_error_free (error);
+      goto out;
+    }
+
+  s = g_string_new ("HTTP/1.0 200 OK\r\n");
+  info = g_file_input_stream_query_info (file_in,
+					 G_FILE_ATTRIBUTE_STANDARD_SIZE ","
+					 G_FILE_ATTRIBUTE_STANDARD_CONTENT_TYPE,
+					 NULL, NULL);
+  if (info)
+    {
+      const char *content_type;
+      char *mime_type;
+
+      if (g_file_info_has_attribute (info, G_FILE_ATTRIBUTE_STANDARD_SIZE))
+	g_string_append_printf (s, "Content-Length: %"G_GINT64_FORMAT"\r\n",
+				g_file_info_get_size (info));
+      content_type = g_file_info_get_content_type (info);
+      if (content_type)
+	{
+	  mime_type = g_content_type_get_mime_type (content_type);
+	  if (mime_type)
+	    {
+	      g_string_append_printf (s, "Content-Type: %s\r\n",
+				      mime_type);
+	      g_free (mime_type);
+	    }
+	}
+    }
+  g_string_append (s, "\r\n");
+
+  if (g_output_stream_write_all (out,
+				 s->str, s->len,
+				 NULL, NULL, NULL))
+    {
+      g_output_stream_splice (out,
+			      G_INPUT_STREAM (file_in),
+			      0, NULL, NULL);
+    }
+  g_string_free (s, TRUE);
+
+  g_input_stream_close (G_INPUT_STREAM (file_in), NULL, NULL);
+  g_object_unref (file_in);
+
+ out:
+  g_object_unref (out);
+  g_object_unref (in);
+  g_object_unref (data);
+
+  return TRUE;
+}
+
+int
+main (int argc, char *argv[])
+{
+  GSocketService *service;
+  GOptionContext *context;
+  GError *error = NULL;
+
+  g_type_init ();
+  g_thread_init (NULL);
+
+  context = g_option_context_new ("<http root dir> - Simple HTTP server");
+  g_option_context_add_main_entries (context, cmd_entries, NULL);
+  if (!g_option_context_parse (context, &argc, &argv, &error))
+    {
+      g_printerr ("%s: %s\n", argv[0], error->message);
+      return 1;
+    }
+
+  if (argc != 2)
+    {
+      g_printerr ("Root directory not specified\n");
+      return 1;
+    }
+
+  root = g_strdup (argv[1]);
+
+  service = g_threaded_socket_service_new ();
+  if (!g_socket_listener_add_inet_port (G_SOCKET_LISTENER (service),
+					port,
+					NULL,
+					&error))
+    {
+      g_printerr ("%s: %s\n", argv[0], error->message);
+      return 1;
+    }
+
+  g_print ("Http server listening on port %d\n", port);
+
+  g_signal_connect (service, "run", G_CALLBACK (handler), NULL);
+
+  g_main_loop_run (g_main_loop_new (NULL, FALSE));
+  g_assert_not_reached ();
+}
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