var expect = require('chai').expect; var util = require('./util'); var compressor = require('../lib/protocol/compressor'); var HeaderTable = compressor.HeaderTable; var HuffmanTable = compressor.HuffmanTable; var HeaderSetCompressor = compressor.HeaderSetCompressor; var HeaderSetDecompressor = compressor.HeaderSetDecompressor; var Compressor = compressor.Compressor; var Decompressor = compressor.Decompressor; var test_integers = [{ N: 5, I: 10, buffer: new Buffer([10]) }, { N: 0, I: 10, buffer: new Buffer([10]) }, { N: 5, I: 1337, buffer: new Buffer([31, 128 + 26, 10]) }, { N: 0, I: 1337, buffer: new Buffer([128 + 57, 10]) }]; var test_strings = [{ string: 'www.foo.com', buffer: new Buffer('89f1e3c2f29ceb90f4ff', 'hex') }, { string: 'éáűőúöüó€', buffer: new Buffer('13c3a9c3a1c5b1c591c3bac3b6c3bcc3b3e282ac', 'hex') }]; test_huffman_request = { 'GET': 'c5837f', 'http': '9d29af', '/': '63', 'www.foo.com': 'f1e3c2f29ceb90f4ff', 'https': '9d29ad1f', 'www.bar.com': 'f1e3c2f18ec5c87a7f', 'no-cache': 'a8eb10649cbf', '/custom-path.css': '6096a127a56ac699d72211', 'custom-key': '25a849e95ba97d7f', 'custom-value': '25a849e95bb8e8b4bf' }; test_huffman_response = { '302': '6402', 'private': 'aec3771a4b', 'Mon, 21 OCt 2013 20:13:21 GMT': 'd07abe941054d5792a0801654102e059b820a98b46ff', ': https://www.bar.com': 'b8a4e94d68b8c31e3c785e31d8b90f4f', '200': '1001', 'Mon, 21 OCt 2013 20:13:22 GMT': 'd07abe941054d5792a0801654102e059b821298b46ff', 'https://www.bar.com': '9d29ad171863c78f0bc63b1721e9', 'gzip': '9bd9ab', 'foo=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\ AAAAAAAAAAAAAAAAAAAAAAAAAALASDJKHQKBZXOQWEOPIUAXQWEOIUAXLJKHQWOEIUAL\ QWEOIUAXLQEUAXLLKJASDQWEOUIAXN1234LASDJKHQKBZXOQWEOPIUAXQWEOIUAXLJKH\ QWOEIUALQWEOIUAXLQEUAXLLKJASDQWEOUIAXN1234LASDJKHQKBZXOQWEOPIUAXQWEO\ IUAXLJKHQWOEIUALQWEOIUAXLQEUAXLLKJASDQWEOUIAXN1234LASDJKHQKBZXOQWEOP\ IUAXQWEOIUAXLJKHQWOEIUALQWEOIUAXLQEUAXLLKJASDQWEOUIAXN1234ZZZZZZZZZZ\ ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ1234 m\ ax-age=3600; version=1': '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', 'foo=ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ\ ZZZZZZZZZZZZZZZZZZZZZZZZZZLASDJKHQKBZXOQWEOPIUAXQWEOIUAXLJKHQWOEIUAL\ QWEOIUAXLQEUAXLLKJASDQWEOUIAXN1234LASDJKHQKBZXOQWEOPIUAXQWEOIUAXLJKH\ QWOEIUALQWEOIUAXLQEUAXLLKJASDQWEOUIAXN1234LASDJKHQKBZXOQWEOPIUAXQWEO\ IUAXLJKHQWOEIUALQWEOIUAXLQEUAXLLKJASDQWEOUIAXN1234LASDJKHQKBZXOQWEOP\ IUAXQWEOIUAXLJKHQWOEIUALQWEOIUAXLQEUAXLLKJASDQWEOUIAXN1234AAAAAAAAAA\ AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA1234 m\ ax-age=3600; version=1': '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' }; var test_headers = [{ // index header: { name: 1, value: 1, index: false, mustNeverIndex: false, contextUpdate: false, newMaxSize: 0 }, buffer: new Buffer('82', 'hex') }, { // index header: { name: 5, value: 5, index: false, mustNeverIndex: false, contextUpdate: false, newMaxSize: 0 }, buffer: new Buffer('86', 'hex') }, { // index header: { name: 3, value: 3, index: false, mustNeverIndex: false, contextUpdate: false, newMaxSize: 0 }, buffer: new Buffer('84', 'hex') }, { // literal w/index, name index header: { name: 0, value: 'www.foo.com', index: true, mustNeverIndex: false, contextUpdate: false, newMaxSize: 0 }, buffer: new Buffer('41' + '89f1e3c2f29ceb90f4ff', 'hex') }, { // indexed header: { name: 1, value: 1, index: false, mustNeverIndex: false, contextUpdate: false, newMaxSize: 0 }, buffer: new Buffer('82', 'hex') }, { // indexed header: { name: 6, value: 6, index: false, mustNeverIndex: false, contextUpdate: false, newMaxSize: 0 }, buffer: new Buffer('87', 'hex') }, { // indexed header: { name: 3, value: 3, index: false, mustNeverIndex: false, contextUpdate: false, newMaxSize: 0 }, buffer: new Buffer('84', 'hex') }, { // literal w/index, name index header: { name: 0, value: 'www.bar.com', index: true, mustNeverIndex: false, contextUpdate: false, newMaxSize: 0 }, buffer: new Buffer('41' + '89f1e3c2f18ec5c87a7f', 'hex') }, { // literal w/index, name index header: { name: 23, value: 'no-cache', index: true, mustNeverIndex: false, contextUpdate: false, newMaxSize: 0 }, buffer: new Buffer('58' + '86a8eb10649cbf', 'hex') }, { // index header: { name: 1, value: 1, index: false, mustNeverIndex: false, contextUpdate: false, newMaxSize: 0 }, buffer: new Buffer('82', 'hex') }, { // index header: { name: 6, value: 6, index: false, mustNeverIndex: false, contextUpdate: false, newMaxSize: 0 }, buffer: new Buffer('87', 'hex') }, { // literal w/index, name index header: { name: 3, value: '/custom-path.css', index: true, mustNeverIndex: false, contextUpdate: false, newMaxSize: 0 }, buffer: new Buffer('44' + '8b6096a127a56ac699d72211', 'hex') }, { // index header: { name: 63, value: 63, index: false, mustNeverIndex: false, contextUpdate: false, newMaxSize: 0 }, buffer: new Buffer('C0', 'hex') }, { // literal w/index, new name & value header: { name: 'custom-key', value: 'custom-value', index: true, mustNeverIndex: false, contextUpdate: false, newMaxSize: 0 }, buffer: new Buffer('40' + '8825a849e95ba97d7f' + '8925a849e95bb8e8b4bf', 'hex') }, { // index header: { name: 1, value: 1, index: false, mustNeverIndex: false, contextUpdate: false, newMaxSize: 0 }, buffer: new Buffer('82', 'hex') }, { // index header: { name: 6, value: 6, index: false, mustNeverIndex: false, contextUpdate: false, newMaxSize: 0 }, buffer: new Buffer('87', 'hex') }, { // index header: { name: 62, value: 62, index: false, mustNeverIndex: false, contextUpdate: false, newMaxSize: 0 }, buffer: new Buffer('BF', 'hex') }, { // index header: { name: 65, value: 65, index: false, mustNeverIndex: false, contextUpdate: false, newMaxSize: 0 }, buffer: new Buffer('C2', 'hex') }, { // index header: { name: 64, value: 64, index: false, mustNeverIndex: false, contextUpdate: false, newMaxSize: 0 }, buffer: new Buffer('C1', 'hex') }, { // index header: { name: 61, value: 61, index: false, mustNeverIndex: false, contextUpdate: false, newMaxSize: 0 }, buffer: new Buffer('BE', 'hex') }, { // Literal w/o index, name index header: { name: 6, value: "whatever", index: false, mustNeverIndex: false, contextUpdate: false, newMaxSize: 0 }, buffer: new Buffer('07' + '86f138d25ee5b3', 'hex') }, { // Literal w/o index, new name & value header: { name: "foo", value: "bar", index: false, mustNeverIndex: false, contextUpdate: false, newMaxSize: 0 }, buffer: new Buffer('00' + '8294e7' + '03626172', 'hex') }, { // Literal never indexed, name index header: { name: 6, value: "whatever", index: false, mustNeverIndex: true, contextUpdate: false, newMaxSize: 0 }, buffer: new Buffer('17' + '86f138d25ee5b3', 'hex') }, { // Literal never indexed, new name & value header: { name: "foo", value: "bar", index: false, mustNeverIndex: true, contextUpdate: false, newMaxSize: 0 }, buffer: new Buffer('10' + '8294e7' + '03626172', 'hex') }, { header: { name: -1, value: -1, index: false, mustNeverIndex: false, contextUpdate: true, newMaxSize: 100 }, buffer: new Buffer('3F45', 'hex') }]; var test_header_sets = [{ headers: { ':method': 'GET', ':scheme': 'http', ':path': '/', ':authority': 'www.foo.com' }, buffer: util.concat(test_headers.slice(0, 4).map(function(test) { return test.buffer; })) }, { headers: { ':method': 'GET', ':scheme': 'https', ':path': '/', ':authority': 'www.bar.com', 'cache-control': 'no-cache' }, buffer: util.concat(test_headers.slice(4, 9).map(function(test) { return test.buffer; })) }, { headers: { ':method': 'GET', ':scheme': 'https', ':path': '/custom-path.css', ':authority': 'www.bar.com', 'custom-key': 'custom-value' }, buffer: util.concat(test_headers.slice(9, 14).map(function(test) { return test.buffer; })) }, { headers: { ':method': 'GET', ':scheme': 'https', ':path': '/custom-path.css', ':authority': ['www.foo.com', 'www.bar.com'], 'custom-key': 'custom-value' }, buffer: util.concat(test_headers.slice(14, 19).map(function(test) { return test.buffer; })) }]; describe('compressor.js', function() { describe('HeaderTable', function() { }); describe('HuffmanTable', function() { describe('method encode(buffer)', function() { it('should return the Huffman encoded version of the input buffer', function() { var table = HuffmanTable.huffmanTable; for (var decoded in test_huffman_request) { var encoded = test_huffman_request[decoded]; expect(table.encode(new Buffer(decoded)).toString('hex')).to.equal(encoded); } table = HuffmanTable.huffmanTable; for (decoded in test_huffman_response) { encoded = test_huffman_response[decoded]; expect(table.encode(new Buffer(decoded)).toString('hex')).to.equal(encoded); } }); }); describe('method decode(buffer)', function() { it('should return the Huffman decoded version of the input buffer', function() { var table = HuffmanTable.huffmanTable; for (var decoded in test_huffman_request) { var encoded = test_huffman_request[decoded]; expect(table.decode(new Buffer(encoded, 'hex')).toString()).to.equal(decoded); } table = HuffmanTable.huffmanTable; for (decoded in test_huffman_response) { encoded = test_huffman_response[decoded]; expect(table.decode(new Buffer(encoded, 'hex')).toString()).to.equal(decoded); } }); }); }); describe('HeaderSetCompressor', function() { describe('static method .integer(I, N)', function() { it('should return an array of buffers that represent the N-prefix coded form of the integer I', function() { for (var i = 0; i < test_integers.length; i++) { var test = test_integers[i]; test.buffer.cursor = 0; expect(util.concat(HeaderSetCompressor.integer(test.I, test.N))).to.deep.equal(test.buffer); } }); }); describe('static method .string(string)', function() { it('should return an array of buffers that represent the encoded form of the string', function() { var table = HuffmanTable.huffmanTable; for (var i = 0; i < test_strings.length; i++) { var test = test_strings[i]; expect(util.concat(HeaderSetCompressor.string(test.string, table))).to.deep.equal(test.buffer); } }); }); describe('static method .header({ name, value, index })', function() { it('should return an array of buffers that represent the encoded form of the header', function() { var table = HuffmanTable.huffmanTable; for (var i = 0; i < test_headers.length; i++) { var test = test_headers[i]; expect(util.concat(HeaderSetCompressor.header(test.header, table))).to.deep.equal(test.buffer); } }); }); }); describe('HeaderSetDecompressor', function() { describe('static method .integer(buffer, N)', function() { it('should return the parsed N-prefix coded number and increase the cursor property of buffer', function() { for (var i = 0; i < test_integers.length; i++) { var test = test_integers[i]; test.buffer.cursor = 0; expect(HeaderSetDecompressor.integer(test.buffer, test.N)).to.equal(test.I); expect(test.buffer.cursor).to.equal(test.buffer.length); } }); }); describe('static method .string(buffer)', function() { it('should return the parsed string and increase the cursor property of buffer', function() { var table = HuffmanTable.huffmanTable; for (var i = 0; i < test_strings.length; i++) { var test = test_strings[i]; test.buffer.cursor = 0; expect(HeaderSetDecompressor.string(test.buffer, table)).to.equal(test.string); expect(test.buffer.cursor).to.equal(test.buffer.length); } }); }); describe('static method .header(buffer)', function() { it('should return the parsed header and increase the cursor property of buffer', function() { var table = HuffmanTable.huffmanTable; for (var i = 0; i < test_headers.length; i++) { var test = test_headers[i]; test.buffer.cursor = 0; expect(HeaderSetDecompressor.header(test.buffer, table)).to.deep.equal(test.header); expect(test.buffer.cursor).to.equal(test.buffer.length); } }); }); }); describe('Decompressor', function() { describe('method decompress(buffer)', function() { it('should return the parsed header set in { name1: value1, name2: [value2, value3], ... } format', function() { var decompressor = new Decompressor(util.log, 'REQUEST'); for (var i = 0; i < test_header_sets.length - 1; i++) { var header_set = test_header_sets[i]; expect(decompressor.decompress(header_set.buffer)).to.deep.equal(header_set.headers); } }); }); describe('transform stream', function() { it('should emit an error event if a series of header frames is interleaved with other frames', function() { var decompressor = new Decompressor(util.log, 'REQUEST'); var error_occured = false; decompressor.on('error', function() { error_occured = true; }); decompressor.write({ type: 'HEADERS', flags: { END_HEADERS: false }, data: new Buffer(5) }); decompressor.write({ type: 'DATA', flags: {}, data: new Buffer(5) }); expect(error_occured).to.be.equal(true); }); }); }); describe('invariant', function() { describe('decompressor.decompress(compressor.compress(headerset)) === headerset', function() { it('should be true for any header set if the states are synchronized', function() { var compressor = new Compressor(util.log, 'REQUEST'); var decompressor = new Decompressor(util.log, 'REQUEST'); var n = test_header_sets.length; for (var i = 0; i < 10; i++) { var headers = test_header_sets[i%n].headers; var compressed = compressor.compress(headers); var decompressed = decompressor.decompress(compressed); expect(decompressed).to.deep.equal(headers); expect(compressor._table).to.deep.equal(decompressor._table); } }); }); describe('source.pipe(compressor).pipe(decompressor).pipe(destination)', function() { it('should behave like source.pipe(destination) for a stream of frames', function(done) { var compressor = new Compressor(util.log, 'RESPONSE'); var decompressor = new Decompressor(util.log, 'RESPONSE'); var n = test_header_sets.length; compressor.pipe(decompressor); for (var i = 0; i < 10; i++) { compressor.write({ type: i%2 ? 'HEADERS' : 'PUSH_PROMISE', flags: {}, headers: test_header_sets[i%n].headers }); } setTimeout(function() { for (var j = 0; j < 10; j++) { expect(decompressor.read().headers).to.deep.equal(test_header_sets[j%n].headers); } done(); }, 10); }); }); describe('huffmanTable.decompress(huffmanTable.compress(buffer)) === buffer', function() { it('should be true for any buffer', function() { for (var i = 0; i < 10; i++) { var buffer = []; while (Math.random() > 0.1) { buffer.push(Math.floor(Math.random() * 256)) } buffer = new Buffer(buffer); var table = HuffmanTable.huffmanTable; var result = table.decode(table.encode(buffer)); expect(result).to.deep.equal(buffer); } }); }); }); });