validate:launcher: Allow limitating local HTTP server bandwith

By default we limit its bandwith to 1MBps which is somehow similare to a
good internet connection case.

validate/gst/validate/gst-validate-bin-monitor.c

@@ -186,18 +186,50 @@ _bus_handler (GstBus * bus, GstMessage * message,
   GError *err;
   gchar *debug;
 
-  if (GST_MESSAGE_TYPE (message) == GST_MESSAGE_ERROR) {
+  switch (GST_MESSAGE_TYPE (message)) {
+    case GST_MESSAGE_ERROR:
       gst_message_parse_error (message, &err, &debug);
       GST_VALIDATE_REPORT (monitor, ERROR_ON_BUS,
           "Got error: %s -- Debug message: %s", err->message, debug);
       g_error_free (err);
       g_free (debug);
-  } else if (GST_MESSAGE_TYPE (message) == GST_MESSAGE_WARNING) {
+      break;
+    case GST_MESSAGE_WARNING:
       gst_message_parse_warning (message, &err, &debug);
       GST_VALIDATE_REPORT (monitor, WARNING_ON_BUS,
           "Got warning: %s -- Debug message: %s", err->message, debug);
       g_error_free (err);
       g_free (debug);
+      break;
+    case GST_MESSAGE_BUFFERING:
+    {
+      GstBufferingMode mode;
+      gint percent;
+
+      gst_message_parse_buffering (message, &percent);
+      gst_message_parse_buffering_stats (message, &mode, NULL, NULL, NULL);
+
+      if (percent == 100) {
+        /* a 100% message means buffering is done */
+        if (monitor->buffering) {
+          monitor->print_pos_srcid =
+              g_timeout_add (PRINT_POSITION_TIMEOUT,
+              (GSourceFunc) print_position, monitor);
+          monitor->buffering = FALSE;
+        }
+      } else {
+        /* buffering... */
+        if (!monitor->buffering) {
+          monitor->buffering = TRUE;
+          if (monitor->print_pos_srcid
+              && g_source_remove (monitor->print_pos_srcid))
+            monitor->print_pos_srcid = 0;
+        }
+      }
+      break;
+    }
+    default:
+      break;
   }
 }
 

validate/gst/validate/gst-validate-bin-monitor.h

@@ -62,6 +62,7 @@ struct _GstValidateBinMonitor {
   gulong element_added_id;
   guint print_pos_srcid;
   gboolean stateless;
+  gboolean buffering;
 };
 
 /**

validate/tools/launcher/RangeHTTPServer.py

@@ -32,18 +32,22 @@ __version__ = "0.1"
 __all__ = ["RangeHTTPRequestHandler"]
 
 import os
+import sys
 import posixpath
 import BaseHTTPServer
 import urllib
 import cgi
 import shutil
 import mimetypes
+import time
 try:
     from cStringIO import StringIO
 except ImportError:
     from StringIO import StringIO
 
 
+_bandwidth = 0
+
 class RangeHTTPRequestHandler(BaseHTTPServer.BaseHTTPRequestHandler):
 
     """Simple HTTP request handler with GET and HEAD commands.
@@ -70,6 +74,11 @@ class RangeHTTPRequestHandler(BaseHTTPServer.BaseHTTPRequestHandler):
             while chunk > 0:
                 if start_range + chunk > end_range:
                     chunk = end_range - start_range
+
+                if _bandwidth != 0:
+                    time_to_sleep = float(float(chunk) / float(_bandwidth))
+                    time.sleep(time_to_sleep)
+
                 try:
                     self.wfile.write(f.read(chunk))
                 except:
@@ -146,7 +155,6 @@ class RangeHTTPRequestHandler(BaseHTTPServer.BaseHTTPRequestHandler):
         self.send_header("Content-Length", end_range - start_range)
         self.send_header("Last-Modified", self.date_time_string(fs.st_mtime))
         self.end_headers()
-        print "Sending Bytes ",start_range, " to ", end_range, "...\n"
         return (f, start_range, end_range)
 
     def list_directory(self, path):
@@ -271,4 +279,6 @@ def test(HandlerClass = RangeHTTPRequestHandler,
 
 
 if __name__ == '__main__':
+    if len(sys.argv) > 2:
+        _bandwidth = int(sys.argv[2])
     test()

validate/tools/launcher/httpserver.py

@@ -63,20 +63,22 @@ class HTTPServer(loggable.Loggable):
 
             print "Starting Server"
             try:
-                self.debug("Lunching twistd server")
-                cmd = "%s %s %d" % (sys.executable, os.path.join(os.path.dirname(__file__),
+                self.debug("Lunching http server")
+                cmd = "%s %s %d %s" % (sys.executable, os.path.join(os.path.dirname(__file__),
                                                      "RangeHTTPServer.py"),
-                                        self.options.http_server_port)
+                                        self.options.http_server_port,
+                                        self.options.http_bandwith,
+                                    )
                 curdir = os.path.abspath(os.curdir)
                 os.chdir(self.options.http_server_dir)
                 #cmd = "twistd -no web --path=%s -p %d" % (
                 #    self.options.http_server_dir, self.options.http_server_port)
-                self.debug("Lunching server: %s", cmd)
+                self.debug("Lunching server: %s (logs in %s)", cmd, self._logsfile)
                 self._process = subprocess.Popen(cmd.split(" "),
                                                  stderr=self._logsfile,
                                                  stdout=self._logsfile)
                 os.chdir(curdir)
-                self.debug("Lunched twistd server")
+                self.debug("Lunched http server")
                 # Dirty way to avoid eating to much CPU...
                 # good enough for us anyway.
                 time.sleep(1)

validate/tools/launcher/main.py

@@ -272,6 +272,9 @@ user argument, you can thus overrides command line options using that.
     http_server_group.add_argument("--http-server-port", dest="http_server_port",
                       default=8079,
                       help="Port on which to run the http server on localhost")
+    http_server_group.add_argument("--http-bandwith-limitation", dest="http_bandwith",
+                      default=1024 * 1024,
+                      help="The artificial bandwith limitation to introduce to the local server (in Bytes/sec) (default: 1 MBps)")
     http_server_group.add_argument("-s", "--folder-for-http-server", dest="http_server_dir",
                       default=None,
                       help="Folder in which to create an http server on localhost. Default is PATHS")