third_party/WebKit/LayoutTests/http/tests/media/video-throttled-load.cgi

   1 #!/usr/bin/perl -wT
   2
   3 use strict;
   4
   5 use CGI;
   6 use File::stat;
   7
   8 use constant CHUNK_SIZE_BYTES => 1024;
   9
  10 my $query = new CGI;
  11
  12 my $name = $query->param('name');
  13 my $filesize = stat($name)->size;
  14
  15 # Get throttling rate, assuming parameter is in kilobytes per second.
  16 my $kbPerSec = $query->param('throttle');
  17 my $chunkPerSec = $kbPerSec * 1024 / CHUNK_SIZE_BYTES;
  18
  19 # Get MIME type if provided.  Default to video/mp4.
  20 my $type = $query->param('type') || "video/mp4";
  21
  22 my $nph = $query->param('nph') || 0;
  23 CGI->nph($nph);
  24
  25 my $contentRange = $ENV{'HTTP_RANGE'};
  26
  27 my $rangeEnd = $filesize - 1;
  28 my @parsedRange = (0, $rangeEnd);
  29
  30 if ($nph) {
  31     # Handle HTTP Range requests.
  32     my $httpContentRange;
  33     my $httpStatus;
  34
  35     if ($contentRange) {
  36         my @values = split('=', $contentRange);
  37         my $rangeType = $values[0];
  38         @parsedRange = split("-", $values[1]);
  39
  40         if (!$parsedRange[1]) {
  41             $parsedRange[1] = $rangeEnd;
  42         }
  43         $httpStatus = "206 Partial Content";
  44         $httpContentRange = "bytes " . $parsedRange[0] . "-" . $parsedRange[1] . "/" . $filesize;
  45     } else {
  46         $httpStatus = "200 OK";
  47     }
  48
  49     print "Status: " . $httpStatus . "\n";
  50     print "Connection: close\n";
  51     print "Content-Length: " . $filesize . "\n";
  52     print "Content-Type: " . $type . "\n";
  53     print "Accept-Ranges: bytes\n";
  54     if ($httpContentRange) {
  55         print "Content-Range: " . $httpContentRange . "\n";
  56     }
  57 } else {
  58     # Print HTTP Header, disabling cache.
  59     print "Cache-Control: no-cache\n";
  60     print "Content-Length: " . $filesize . "\n";
  61     print "Content-Type: " . $type . "\n";
  62 }
  63
  64 print "\n";
  65
  66 open FILE, $name or die;
  67 binmode FILE;
  68 my ($data, $n);
  69 my $total = 0;
  70
  71 seek(FILE, $parsedRange[0], 0);
  72
  73 while (($n = read FILE, $data, 1024) != 0) {
  74     print $data;
  75
  76     $total += $n;
  77     if (($total >= $filesize) || ($total > $parsedRange[1])) {
  78         last;
  79     }
  80
  81     # Throttle if there is some.
  82     if ($chunkPerSec > 0) {
  83         select(undef, undef, undef, 1.0 / $chunkPerSec);
  84     }
  85 }
  86 close(FILE);