Merge commit 'http-launch/merge'

network/http-launch/http-launch.c

@@ -0,0 +1,548 @@
+/*
+ * Copyright (C) 2013 Sebastian Dröge <slomo@circular-chaos.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <string.h>
+#include <gst/gst.h>
+#include <gio/gio.h>
+
+typedef struct
+{
+  gchar *name;
+  GSocketConnection *connection;
+  GSocket *socket;
+  GInputStream *istream;
+  GOutputStream *ostream;
+  GSource *isource, *tosource;
+  GByteArray *current_message;
+  gchar *http_version;
+  gboolean waiting_200_ok;
+} Client;
+
+static const char *known_mimetypes[] = {
+  "video/webm",
+  "multipart/x-mixed-replace",
+  NULL
+};
+
+static GMainLoop *loop = NULL;
+G_LOCK_DEFINE_STATIC (clients);
+static GList *clients = NULL;
+static GstElement *pipeline = NULL;
+static GstElement *multisocketsink = NULL;
+static gboolean started = FALSE;
+static gchar *content_type;
+G_LOCK_DEFINE_STATIC (caps);
+static gboolean caps_resolved = FALSE;
+
+static void
+remove_client (Client * client)
+{
+  g_print ("Removing connection %s\n", client->name);
+
+  G_LOCK (clients);
+  clients = g_list_remove (clients, client);
+  G_UNLOCK (clients);
+
+  g_free (client->name);
+  g_free (client->http_version);
+
+  if (client->isource) {
+    g_source_destroy (client->isource);
+    g_source_unref (client->isource);
+  }
+  if (client->tosource) {
+    g_source_destroy (client->tosource);
+    g_source_unref (client->tosource);
+  }
+  g_object_unref (client->connection);
+  g_byte_array_unref (client->current_message);
+
+  g_slice_free (Client, client);
+}
+
+static void
+write_bytes (Client * client, const gchar * data, guint len)
+{
+  gssize w;
+  GError *err = NULL;
+
+  /* TODO: We assume this never blocks */
+  do {
+    w = g_output_stream_write (client->ostream, data, len, NULL, &err);
+    if (w > 0) {
+      len -= w;
+      data += w;
+    }
+  } while (w > 0 && len > 0);
+
+  if (w <= 0) {
+    if (err) {
+      g_print ("Write error %s\n", err->message);
+      g_clear_error (&err);
+    }
+    remove_client (client);
+  }
+}
+
+static void
+send_response_200_ok (Client * client)
+{
+  gchar *response;
+  response = g_strdup_printf ("%s 200 OK\r\n%s\r\n", client->http_version,
+        content_type);
+  write_bytes (client, response, strlen (response));
+  g_free (response);
+}
+
+static void
+send_response_404_not_found (Client * client)
+{
+  gchar *response;
+  response = g_strdup_printf ("%s 404 Not Found\r\n\r\n", client->http_version);
+  write_bytes (client, response, strlen (response));
+  g_free (response);
+}
+
+static void
+client_message (Client * client, const gchar * data, guint len)
+{
+  gboolean http_head_request = FALSE;
+  gboolean http_get_request = FALSE;
+  gchar **lines = g_strsplit_set (data, "\r\n", -1);
+
+  if (g_str_has_prefix (lines[0], "HEAD"))
+    http_head_request = TRUE;
+  else if (g_str_has_prefix (lines[0], "GET"))
+    http_get_request = TRUE;
+
+  if (http_head_request || http_get_request) {
+    gchar **parts = g_strsplit (lines[0], " ", -1);
+    gboolean ok = FALSE;
+
+    g_free (client->http_version);
+
+    if (parts[1] && parts[2] && *parts[2] != '\0')
+      client->http_version = g_strdup (parts[2]);
+    else
+      client->http_version = g_strdup ("HTTP/1.0");
+
+    if (parts[1] && strcmp (parts[1], "/") == 0) {
+      G_LOCK (caps);
+      if (caps_resolved)
+        send_response_200_ok (client);
+      else
+        client->waiting_200_ok = TRUE;
+      G_UNLOCK (caps);
+      ok = TRUE;
+    } else {
+      send_response_404_not_found (client);
+    }
+    g_strfreev (parts);
+
+    if (ok) {
+      if (http_get_request) {
+        /* Start streaming to client socket */
+        g_source_destroy (client->isource);
+        g_source_unref (client->isource);
+        client->isource = NULL;
+        g_source_destroy (client->tosource);
+        g_source_unref (client->tosource);
+        client->tosource = NULL;
+        g_print ("Starting to stream to %s\n", client->name);
+        g_signal_emit_by_name (multisocketsink, "add", client->socket);
+      }
+
+      if (!started) {
+        g_print ("Starting pipeline\n");
+        if (gst_element_set_state (pipeline,
+                GST_STATE_PLAYING) == GST_STATE_CHANGE_FAILURE) {
+          g_print ("Failed to start pipeline\n");
+          g_main_loop_quit (loop);
+        }
+        started = TRUE;
+      }
+    }
+  } else {
+    gchar **parts = g_strsplit (lines[0], " ", -1);
+    gchar *response;
+    const gchar *http_version;
+
+    if (parts[1] && parts[2] && *parts[2] != '\0')
+      http_version = parts[2];
+    else
+      http_version = "HTTP/1.0";
+
+    response = g_strdup_printf ("%s 400 Bad Request\r\n\r\n", http_version);
+    write_bytes (client, response, strlen (response));
+    g_free (response);
+    g_strfreev (parts);
+    remove_client (client);
+  }
+
+  g_strfreev (lines);
+}
+
+static gboolean
+on_timeout (Client * client)
+{
+  g_print ("Timeout\n");
+  remove_client (client);
+
+  return FALSE;
+}
+
+static gboolean
+on_read_bytes (GPollableInputStream * stream, Client * client)
+{
+  gssize r;
+  gchar data[4096];
+  GError *err = NULL;
+
+  do {
+    r = g_pollable_input_stream_read_nonblocking (G_POLLABLE_INPUT_STREAM
+        (client->istream), data, sizeof (data), NULL, &err);
+    if (r > 0)
+      g_byte_array_append (client->current_message, (guint8 *) data, r);
+  } while (r > 0);
+
+  if (r == 0) {
+    remove_client (client);
+    return FALSE;
+  } else if (g_error_matches (err, G_IO_ERROR, G_IO_ERROR_WOULD_BLOCK)) {
+    guint8 *tmp = client->current_message->data;
+    guint tmp_len = client->current_message->len;
+
+    g_clear_error (&err);
+
+    while (tmp_len > 3) {
+      if (tmp[0] == 0x0d && tmp[1] == 0x0a && tmp[2] == 0x0d && tmp[3] == 0x0a) {
+        guint len;
+
+        g_byte_array_append (client->current_message, (const guint8 *) "\0", 1);
+        len = tmp - client->current_message->data + 5;
+        client_message (client, (gchar *) client->current_message->data, len);
+        g_byte_array_remove_range (client->current_message, 0, len);
+        tmp = client->current_message->data;
+	tmp_len = client->current_message->len;
+      } else {
+        tmp++;
+	tmp_len--;
+      }
+    }
+
+    if (client->current_message->len >= 1024 * 1024) {
+      g_print ("No complete request after 1MB of data\n");
+      remove_client (client);
+      return FALSE;
+    }
+
+    return TRUE;
+  } else {
+    g_print ("Read error %s\n", err->message);
+    g_clear_error (&err);
+    remove_client (client);
+    return FALSE;
+  }
+
+  return FALSE;
+}
+
+static gboolean
+on_new_connection (GSocketService * service, GSocketConnection * connection,
+    GObject * source_object, gpointer user_data)
+{
+  Client *client = g_slice_new0 (Client);
+  GSocketAddress *addr;
+  GInetAddress *iaddr;
+  gchar *ip;
+  guint16 port;
+
+  addr = g_socket_connection_get_remote_address (connection, NULL);
+  iaddr = g_inet_socket_address_get_address (G_INET_SOCKET_ADDRESS (addr));
+  port = g_inet_socket_address_get_port (G_INET_SOCKET_ADDRESS (addr));
+  ip = g_inet_address_to_string (iaddr);
+  client->name = g_strdup_printf ("%s:%u", ip, port);
+  g_free (ip);
+  g_object_unref (addr);
+
+  g_print ("New connection %s\n", client->name);
+
+  client->waiting_200_ok = FALSE;
+  client->http_version = g_strdup ("");
+  client->connection = g_object_ref (connection);
+  client->socket = g_socket_connection_get_socket (connection);
+  client->istream =
+      g_io_stream_get_input_stream (G_IO_STREAM (client->connection));
+  client->ostream =
+      g_io_stream_get_output_stream (G_IO_STREAM (client->connection));
+  client->current_message = g_byte_array_sized_new (1024);
+
+  client->tosource = g_timeout_source_new_seconds (5);
+  g_source_set_callback (client->tosource, (GSourceFunc) on_timeout, client,
+      NULL);
+  g_source_attach (client->tosource, NULL);
+
+  client->isource =
+      g_pollable_input_stream_create_source (G_POLLABLE_INPUT_STREAM
+      (client->istream), NULL);
+  g_source_set_callback (client->isource, (GSourceFunc) on_read_bytes, client,
+      NULL);
+  g_source_attach (client->isource, NULL);
+
+  G_LOCK (clients);
+  clients = g_list_prepend (clients, client);
+  G_UNLOCK (clients);
+
+  return TRUE;
+}
+
+static gboolean
+on_message (GstBus * bus, GstMessage * message, gpointer user_data)
+{
+  switch (GST_MESSAGE_TYPE (message)) {
+    case GST_MESSAGE_ERROR:{
+      gchar *debug;
+      GError *err;
+
+      gst_message_parse_error (message, &err, &debug);
+      g_print ("Error %s\n", err->message);
+      g_error_free (err);
+      g_free (debug);
+      g_main_loop_quit (loop);
+      break;
+    }
+    case GST_MESSAGE_WARNING:{
+      gchar *debug;
+      GError *err;
+
+      gst_message_parse_warning (message, &err, &debug);
+      g_print ("Warning %s\n", err->message);
+      g_error_free (err);
+      g_free (debug);
+      break;
+    }
+    case GST_MESSAGE_EOS:{
+      g_print ("EOS\n");
+      g_main_loop_quit (loop);
+    }
+    default:
+      break;
+  }
+
+  return TRUE;
+}
+
+static void
+on_client_socket_removed (GstElement * element, GSocket * socket,
+    gpointer user_data)
+{
+  GList *l;
+  Client *client = NULL;
+
+  G_LOCK (clients);
+  for (l = clients; l; l = l->next) {
+    Client *tmp = l->data;
+    if (socket == tmp->socket) {
+      client = tmp;
+      break;
+    }
+  }
+  G_UNLOCK (clients);
+
+  if (client)
+    remove_client (client);
+}
+
+static void on_stream_caps_changed (GObject *obj, GParamSpec *pspec,
+    gpointer user_data)
+{
+  GstPad *src_pad;
+  GstCaps *src_caps;
+  GstStructure *gstrc;
+  GList *l;
+
+  src_pad = (GstPad *) obj;
+  src_caps = gst_pad_get_current_caps (src_pad);
+  gstrc = gst_caps_get_structure (src_caps, 0);
+
+  /*
+   * Include a Content-type header in the case we know the mime
+   * type is OK in HTTP. Required for MJPEG streams.
+   */
+  int i = 0;
+  const gchar *mimetype = gst_structure_get_name(gstrc);
+  while (known_mimetypes[i] != NULL)
+  {
+    if (strcmp(mimetype, known_mimetypes[i]) == 0)
+    {
+      if (content_type)
+        g_free(content_type);
+
+      /* Handle the (maybe not so) especial case of multipart to add boundary */
+      if (strcmp(mimetype, "multipart/x-mixed-replace") == 0 &&
+          gst_structure_has_field_typed(gstrc, "boundary", G_TYPE_STRING))
+      {
+        const gchar *boundary = gst_structure_get_string(gstrc, "boundary");
+        content_type = g_strdup_printf ("Content-Type: "
+	          "multipart/x-mixed-replace;boundary=--%s\r\n", boundary);
+      }
+      else
+      {
+        content_type = g_strdup_printf ("Content-Type: %s\r\n", mimetype);
+      }
+      g_print("%s", content_type);
+      break;
+    }
+    i++;
+  }
+
+  gst_caps_unref (src_caps);
+
+  /* Send 200 OK to those clients waiting for it */
+  G_LOCK (caps);
+
+  caps_resolved = TRUE;
+
+  G_LOCK (clients);
+  for (l = clients; l; l = l->next) {
+    Client *cl = l->data;
+    if (cl->waiting_200_ok) {
+      send_response_200_ok (cl);
+      cl->waiting_200_ok = FALSE;
+      break;
+    }
+  }
+  G_UNLOCK (clients);
+
+  G_UNLOCK (caps);
+}
+
+int
+main (gint argc, gchar ** argv)
+{
+  GSocketService *service;
+  GstElement *bin, *stream;
+  GstPad *srcpad, *ghostpad, *sinkpad;
+  GError *err = NULL;
+  GstBus *bus;
+
+  gst_init (&argc, &argv);
+
+  if (argc < 4) {
+    g_print ("usage: %s PORT <launch line>\n"
+        "example: %s 8080 ( videotestsrc ! theoraenc ! oggmux name=stream )\n",
+        argv[0], argv[0]);
+    return -1;
+  }
+
+  const gchar *port_str = argv[1];
+  const int port = (int) g_ascii_strtoll(port_str, NULL, 10);
+
+  bin = gst_parse_launchv ((const gchar **) argv + 2, &err);
+  if (!bin) {
+    g_print ("invalid pipeline: %s\n", err->message);
+    g_clear_error (&err);
+    return -2;
+  }
+
+  stream = gst_bin_get_by_name (GST_BIN (bin), "stream");
+  if (!stream) {
+    g_print ("no element with name \"stream\" found\n");
+    gst_object_unref (bin);
+    return -3;
+  }
+
+  srcpad = gst_element_get_static_pad (stream, "src");
+  if (!srcpad) {
+    g_print ("no \"src\" pad in element \"stream\" found\n");
+    gst_object_unref (stream);
+    gst_object_unref (bin);
+    return -4;
+  }
+
+  content_type = g_strdup ("");
+  g_signal_connect (srcpad, "notify::caps",
+                  G_CALLBACK (on_stream_caps_changed),
+                  NULL);
+
+  ghostpad = gst_ghost_pad_new ("src", srcpad);
+  gst_element_add_pad (GST_ELEMENT (bin), ghostpad);
+  gst_object_unref (srcpad);
+
+  pipeline = gst_pipeline_new (NULL);
+
+  multisocketsink = gst_element_factory_make ("multisocketsink", NULL);
+  g_object_set (multisocketsink,
+      "unit-format", GST_FORMAT_TIME,
+      "units-max", (gint64) 7 * GST_SECOND,
+      "units-soft-max", (gint64) 3 * GST_SECOND,
+      "recover-policy", 3 /* keyframe */ ,
+      "timeout", (guint64) 10 * GST_SECOND,
+      "sync-method", 1 /* next-keyframe */ ,
+      NULL);
+
+  gst_bin_add_many (GST_BIN (pipeline), bin, multisocketsink, NULL);
+
+  sinkpad = gst_element_get_static_pad (multisocketsink, "sink");
+  gst_pad_link (ghostpad, sinkpad);
+  gst_object_unref (sinkpad);
+
+  bus = gst_element_get_bus (pipeline);
+  gst_bus_add_signal_watch (bus);
+  g_signal_connect (bus, "message", G_CALLBACK (on_message), NULL);
+  gst_object_unref (bus);
+
+  g_signal_connect (multisocketsink, "client-socket-removed",
+      G_CALLBACK (on_client_socket_removed), NULL);
+
+  loop = g_main_loop_new (NULL, FALSE);
+
+  if (gst_element_set_state (pipeline,
+          GST_STATE_READY) == GST_STATE_CHANGE_FAILURE) {
+    gst_object_unref (pipeline);
+    g_main_loop_unref (loop);
+    g_print ("Failed to set pipeline to ready\n");
+    return -5;
+  }
+
+  service = g_socket_service_new ();
+  g_socket_listener_add_inet_port (G_SOCKET_LISTENER (service), port, NULL,
+      NULL);
+
+  g_signal_connect (service, "incoming", G_CALLBACK (on_new_connection), NULL);
+
+  g_socket_service_start (service);
+
+  g_print ("Listening on http://127.0.0.1:%d/\n", port);
+
+  g_main_loop_run (loop);
+
+  g_socket_service_stop (service);
+  g_object_unref (service);
+
+  gst_element_set_state (pipeline, GST_STATE_NULL);
+  gst_object_unref (pipeline);
+
+  g_main_loop_unref (loop);
+
+  return 0;
+}