The Tor Browser / file comparison
comparison: content/media/test/cancellable_request.sjs
content/media/test/cancellable_request.sjs
- branch
- TOR_BUG_9701
- changeset 12
- 7540298fafa1
equal
deleted
inserted
replaced
| -1:000000000000 | 0:74e936f8ea19 |
|---|---|
| 1 function parseQuery(request, key) { | |
| 2 var params = request.queryString.split('&'); | |
| 3 for (var j = 0; j < params.length; ++j) { | |
| 4 var p = params[j]; | |
| 5 if (p == key) | |
| 6 return true; | |
| 7 if (p.indexOf(key + "=") == 0) | |
| 8 return p.substring(key.length + 1); | |
| 9 if (p.indexOf("=") < 0 && key == "") | |
| 10 return p; | |
| 11 } | |
| 12 return false; | |
| 13 } | |
| 14 | |
| 15 function push32BE(array, input) { | |
| 16 array.push(String.fromCharCode((input >> 24) & 0xff)); | |
| 17 array.push(String.fromCharCode((input >> 16) & 0xff)); | |
| 18 array.push(String.fromCharCode((input >> 8) & 0xff)); | |
| 19 array.push(String.fromCharCode((input) & 0xff)); | |
| 20 } | |
| 21 | |
| 22 function push32LE(array, input) { | |
| 23 array.push(String.fromCharCode((input) & 0xff)); | |
| 24 array.push(String.fromCharCode((input >> 8) & 0xff)); | |
| 25 array.push(String.fromCharCode((input >> 16) & 0xff)); | |
| 26 array.push(String.fromCharCode((input >> 24) & 0xff)); | |
| 27 } | |
| 28 | |
| 29 function push16LE(array, input) { | |
| 30 array.push(String.fromCharCode((input) & 0xff)); | |
| 31 array.push(String.fromCharCode((input >> 8) & 0xff)); | |
| 32 } | |
| 33 | |
| 34 function buildWave(samples, sample_rate) { | |
| 35 const RIFF_MAGIC = 0x52494646; | |
| 36 const WAVE_MAGIC = 0x57415645; | |
| 37 const FRMT_MAGIC = 0x666d7420; | |
| 38 const DATA_MAGIC = 0x64617461; | |
| 39 const RIFF_SIZE = 44; | |
| 40 | |
| 41 var header = []; | |
| 42 push32BE(header, RIFF_MAGIC); | |
| 43 push32LE(header, RIFF_SIZE + samples.length * 2); | |
| 44 push32BE(header, WAVE_MAGIC); | |
| 45 push32BE(header, FRMT_MAGIC); | |
| 46 push32LE(header, 16); | |
| 47 push16LE(header, 1); | |
| 48 push16LE(header, 1); | |
| 49 push32LE(header, sample_rate); | |
| 50 push32LE(header, sample_rate); | |
| 51 push16LE(header, 2); | |
| 52 push16LE(header, 16); | |
| 53 push32BE(header, DATA_MAGIC); | |
| 54 push32LE(header, samples.length * 2); | |
| 55 for (var i = 0; i < samples.length; ++i) { | |
| 56 push16LE(header, samples[i], 2); | |
| 57 } | |
| 58 return header; | |
| 59 } | |
| 60 | |
| 61 const Ci = Components.interfaces; | |
| 62 const CC = Components.Constructor; | |
| 63 const Timer = CC("@mozilla.org/timer;1", "nsITimer", "initWithCallback"); | |
| 64 const BinaryOutputStream = CC("@mozilla.org/binaryoutputstream;1", | |
| 65 "nsIBinaryOutputStream", | |
| 66 "setOutputStream"); | |
| 67 | |
| 68 function poll(f) { | |
| 69 if (f()) { | |
| 70 return; | |
| 71 } | |
| 72 new Timer(function() { poll(f); }, 100, Ci.nsITimer.TYPE_ONE_SHOT); | |
| 73 } | |
| 74 | |
| 75 function handleRequest(request, response) | |
| 76 { | |
| 77 var cancel = parseQuery(request, "cancelkey"); | |
| 78 if (cancel) { | |
| 79 setState(cancel[1], "cancelled"); | |
| 80 response.setStatusLine(request.httpVersion, 200, "OK"); | |
| 81 response.write("Cancel approved!"); | |
| 82 return; | |
| 83 } | |
| 84 | |
| 85 var samples = []; | |
| 86 for (var i = 0; i < 1000000; ++i) { | |
| 87 samples.push(0); | |
| 88 } | |
| 89 var bytes = buildWave(samples, 44100).join(""); | |
| 90 | |
| 91 var key = parseQuery(request, "key"); | |
| 92 response.setHeader("Content-Type", "audio/x-wav"); | |
| 93 response.setHeader("Content-Length", ""+bytes.length, false); | |
| 94 | |
| 95 var out = new BinaryOutputStream(response.bodyOutputStream); | |
| 96 | |
| 97 var start = 0, end = bytes.length - 1; | |
| 98 if (request.hasHeader("Range")) | |
| 99 { | |
| 100 var rangeMatch = request.getHeader("Range").match(/^bytes=(\d+)?-(\d+)?$/); | |
| 101 | |
| 102 if (rangeMatch[1] !== undefined) | |
| 103 start = parseInt(rangeMatch[1], 10); | |
| 104 | |
| 105 if (rangeMatch[2] !== undefined) | |
| 106 end = parseInt(rangeMatch[2], 10); | |
| 107 | |
| 108 // No start given, so the end is really the count of bytes from the | |
| 109 // end of the file. | |
| 110 if (start === undefined) | |
| 111 { | |
| 112 start = Math.max(0, bytes.length - end); | |
| 113 end = bytes.length - 1; | |
| 114 } | |
| 115 | |
| 116 // start and end are inclusive | |
| 117 if (end === undefined || end >= bytes.length) | |
| 118 end = bytes.length - 1; | |
| 119 | |
| 120 if (end < start) | |
| 121 { | |
| 122 response.setStatusLine(request.httpVersion, 200, "OK"); | |
| 123 start = 0; | |
| 124 end = bytes.length - 1; | |
| 125 } | |
| 126 else | |
| 127 { | |
| 128 response.setStatusLine(request.httpVersion, 206, "Partial Content"); | |
| 129 var contentRange = "bytes " + start + "-" + end + "/" + bytes.length; | |
| 130 response.setHeader("Content-Range", contentRange); | |
| 131 } | |
| 132 } | |
| 133 | |
| 134 if (start > 0) { | |
| 135 // Send all requested data | |
| 136 out.write(bytes.slice(start, end + 1), end + 1 - start); | |
| 137 return; | |
| 138 } | |
| 139 | |
| 140 // Write the first 1.2M of the Wave file. We know the cache size is set to | |
| 141 // 100K so this will fill the cache and and cause a "suspend" event on | |
| 142 // the loading element. | |
| 143 out.write(bytes, 1200000); | |
| 144 | |
| 145 response.processAsync(); | |
| 146 // Now wait for the message to cancel this response | |
| 147 poll(function() { | |
| 148 if (getState(key[1]) != "cancelled") { | |
| 149 return false; | |
| 150 } | |
| 151 response.finish(); | |
| 152 return true; | |
| 153 }); | |
| 154 } |
