hpack_round_trip_test.cc revision 5c02ac1a9c1b504631c0a3d2b6e737b5d738bae1 
1// Copyright 2014 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include <cmath>
6#include <ctime>
7#include <map>
8#include <string>
9#include <vector>
10
11#include "base/rand_util.h"
12#include "net/spdy/hpack_constants.h"
13#include "net/spdy/hpack_decoder.h"
14#include "net/spdy/hpack_encoder.h"
15#include "testing/gtest/include/gtest/gtest.h"
16
17namespace net {
18
19using std::map;
20using std::string;
21using std::vector;
22
23namespace {
24
25class HpackRoundTripTest : public ::testing::Test {
26 protected:
27  HpackRoundTripTest()
28      : encoder_(ObtainHpackHuffmanTable()),
29        decoder_(ObtainHpackHuffmanTable()) {}
30
31  virtual void SetUp() {
32    // Use a small table size to tickle eviction handling.
33    encoder_.ApplyHeaderTableSizeSetting(256);
34    decoder_.ApplyHeaderTableSizeSetting(256);
35  }
36
37  bool RoundTrip(const map<string, string>& header_set) {
38    string encoded;
39    encoder_.EncodeHeaderSet(header_set, &encoded);
40
41    bool success = decoder_.HandleControlFrameHeadersData(
42        1, encoded.data(), encoded.size());
43    success &= decoder_.HandleControlFrameHeadersComplete(1);
44
45    EXPECT_EQ(header_set, decoder_.decoded_block());
46    return success;
47  }
48
49  size_t SampleExponential(size_t mean, size_t sanity_bound) {
50    return std::min<size_t>(-std::log(base::RandDouble()) * mean,
51                            sanity_bound);
52  }
53
54  HpackEncoder encoder_;
55  HpackDecoder decoder_;
56};
57
58TEST_F(HpackRoundTripTest, ResponseFixtures) {
59  {
60    map<string, string> headers;
61    headers[":status"] = "302";
62    headers["cache-control"] = "private";
63    headers["date"] = "Mon, 21 Oct 2013 20:13:21 GMT";
64    headers["location"] = "https://www.example.com";
65    EXPECT_TRUE(RoundTrip(headers));
66  }
67  {
68    map<string, string> headers;
69    headers[":status"] = "200";
70    headers["cache-control"] = "private";
71    headers["date"] = "Mon, 21 Oct 2013 20:13:21 GMT";
72    headers["location"] = "https://www.example.com";
73    EXPECT_TRUE(RoundTrip(headers));
74  }
75  {
76    map<string, string> headers;
77    headers[":status"] = "200";
78    headers["cache-control"] = "private";
79    headers["content-encoding"] = "gzip";
80    headers["date"] = "Mon, 21 Oct 2013 20:13:22 GMT";
81    headers["location"] = "https://www.example.com";
82    headers["set-cookie"] = "foo=ASDJKHQKBZXOQWEOPIUAXQWEOIU;"
83        " max-age=3600; version=1";
84    EXPECT_TRUE(RoundTrip(headers));
85  }
86}
87
88TEST_F(HpackRoundTripTest, RequestFixtures) {
89  {
90    map<string, string> headers;
91    headers[":authority"] = "www.example.com";
92    headers[":method"] = "GET";
93    headers[":path"] = "/";
94    headers[":scheme"] = "http";
95    headers["cookie"] = "baz=bing; foo=bar";
96    EXPECT_TRUE(RoundTrip(headers));
97  }
98  {
99    map<string, string> headers;
100    headers[":authority"] = "www.example.com";
101    headers[":method"] = "GET";
102    headers[":path"] = "/";
103    headers[":scheme"] = "http";
104    headers["cache-control"] = "no-cache";
105    headers["cookie"] = "fizzle=fazzle; foo=bar";
106    EXPECT_TRUE(RoundTrip(headers));
107  }
108  {
109    map<string, string> headers;
110    headers[":authority"] = "www.example.com";
111    headers[":method"] = "GET";
112    headers[":path"] = "/index.html";
113    headers[":scheme"] = "https";
114    headers["custom-key"] = "custom-value";
115    headers["cookie"] = "baz=bing; fizzle=fazzle; garbage";
116    EXPECT_TRUE(RoundTrip(headers));
117  }
118}
119
120TEST_F(HpackRoundTripTest, RandomizedExamples) {
121  // Grow vectors of names & values, which are seeded with fixtures and then
122  // expanded with dynamically generated data. Samples are taken using the
123  // exponential distribution.
124  vector<string> names;
125  names.push_back(":authority");
126  names.push_back(":path");
127  names.push_back(":status");
128  // TODO(jgraettinger): Enable "cookie" as a name fixture. Crumbs may be
129  // reconstructed in any order, which breaks the simple validation used here.
130
131  vector<string> values;
132  values.push_back("/");
133  values.push_back("/index.html");
134  values.push_back("200");
135  values.push_back("404");
136  values.push_back("");
137  values.push_back("baz=bing; foo=bar; garbage");
138  values.push_back("baz=bing; fizzle=fazzle; garbage");
139
140  int seed = std::time(NULL);
141  LOG(INFO) << "Seeding with srand(" << seed << ")";
142  srand(seed);
143
144  for (size_t i = 0; i != 2000; ++i) {
145    map<string, string> headers;
146
147    size_t header_count = 1 + SampleExponential(7, 50);
148    for (size_t j = 0; j != header_count; ++j) {
149      size_t name_index = SampleExponential(20, 200);
150      size_t value_index = SampleExponential(20, 200);
151
152      string name, value;
153      if (name_index >= names.size()) {
154        names.push_back(base::RandBytesAsString(1 + SampleExponential(5, 30)));
155        name = names.back();
156      } else {
157        name = names[name_index];
158      }
159      if (value_index >= values.size()) {
160        values.push_back(base::RandBytesAsString(
161            1 + SampleExponential(15, 75)));
162        value = values.back();
163      } else {
164        value = values[value_index];
165      }
166      headers[name] = value;
167    }
168    EXPECT_TRUE(RoundTrip(headers));
169  }
170}
171
172}  // namespace
173
174}  // namespace net
175