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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <cmath>
#include <cstdint>
#include <ctime>
#include <vector>
#include "net/third_party/quiche/src/http2/test_tools/http2_random.h"
#include "net/third_party/quiche/src/common/platform/api/quiche_test.h"
#include "net/third_party/quiche/src/spdy/core/hpack/hpack_constants.h"
#include "net/third_party/quiche/src/spdy/core/hpack/hpack_decoder_adapter.h"
#include "net/third_party/quiche/src/spdy/core/hpack/hpack_encoder.h"
#include "net/third_party/quiche/src/spdy/core/spdy_test_utils.h"
namespace spdy {
namespace test {
namespace {
// Supports testing with the input split at every byte boundary.
enum InputSizeParam { ALL_INPUT, ONE_BYTE, ZERO_THEN_ONE_BYTE };
class HpackRoundTripTest : public QuicheTestWithParam<InputSizeParam> {
protected:
HpackRoundTripTest() : encoder_(ObtainHpackHuffmanTable()), decoder_() {}
void SetUp() override {
// Use a small table size to tickle eviction handling.
encoder_.ApplyHeaderTableSizeSetting(256);
decoder_.ApplyHeaderTableSizeSetting(256);
}
bool RoundTrip(const SpdyHeaderBlock& header_set) {
std::string encoded;
encoder_.EncodeHeaderSet(header_set, &encoded);
bool success = true;
if (GetParam() == ALL_INPUT) {
// Pass all the input to the decoder at once.
success = decoder_.HandleControlFrameHeadersData(encoded.data(),
encoded.size());
} else if (GetParam() == ONE_BYTE) {
// Pass the input to the decoder one byte at a time.
const char* data = encoded.data();
for (size_t ndx = 0; ndx < encoded.size() && success; ++ndx) {
success = decoder_.HandleControlFrameHeadersData(data + ndx, 1);
}
} else if (GetParam() == ZERO_THEN_ONE_BYTE) {
// Pass the input to the decoder one byte at a time, but before each
// byte pass an empty buffer.
const char* data = encoded.data();
for (size_t ndx = 0; ndx < encoded.size() && success; ++ndx) {
success = (decoder_.HandleControlFrameHeadersData(data + ndx, 0) &&
decoder_.HandleControlFrameHeadersData(data + ndx, 1));
}
} else {
ADD_FAILURE() << "Unknown param: " << GetParam();
}
if (success) {
success = decoder_.HandleControlFrameHeadersComplete(nullptr);
}
EXPECT_EQ(header_set, decoder_.decoded_block());
return success;
}
size_t SampleExponential(size_t mean, size_t sanity_bound) {
return std::min<size_t>(-std::log(random_.RandDouble()) * mean,
sanity_bound);
}
http2::test::Http2Random random_;
HpackEncoder encoder_;
HpackDecoderAdapter decoder_;
};
INSTANTIATE_TEST_SUITE_P(Tests,
HpackRoundTripTest,
::testing::Values(ALL_INPUT,
ONE_BYTE,
ZERO_THEN_ONE_BYTE));
TEST_P(HpackRoundTripTest, ResponseFixtures) {
{
SpdyHeaderBlock headers;
headers[":status"] = "302";
headers["cache-control"] = "private";
headers["date"] = "Mon, 21 Oct 2013 20:13:21 GMT";
headers["location"] = "https://www.example.com";
EXPECT_TRUE(RoundTrip(headers));
}
{
SpdyHeaderBlock headers;
headers[":status"] = "200";
headers["cache-control"] = "private";
headers["date"] = "Mon, 21 Oct 2013 20:13:21 GMT";
headers["location"] = "https://www.example.com";
EXPECT_TRUE(RoundTrip(headers));
}
{
SpdyHeaderBlock headers;
headers[":status"] = "200";
headers["cache-control"] = "private";
headers["content-encoding"] = "gzip";
headers["date"] = "Mon, 21 Oct 2013 20:13:22 GMT";
headers["location"] = "https://www.example.com";
headers["set-cookie"] =
"foo=ASDJKHQKBZXOQWEOPIUAXQWEOIU;"
" max-age=3600; version=1";
headers["multivalue"] = std::string("foo\0bar", 7);
EXPECT_TRUE(RoundTrip(headers));
}
}
TEST_P(HpackRoundTripTest, RequestFixtures) {
{
SpdyHeaderBlock headers;
headers[":authority"] = "www.example.com";
headers[":method"] = "GET";
headers[":path"] = "/";
headers[":scheme"] = "http";
headers["cookie"] = "baz=bing; foo=bar";
EXPECT_TRUE(RoundTrip(headers));
}
{
SpdyHeaderBlock headers;
headers[":authority"] = "www.example.com";
headers[":method"] = "GET";
headers[":path"] = "/";
headers[":scheme"] = "http";
headers["cache-control"] = "no-cache";
headers["cookie"] = "foo=bar; spam=eggs";
EXPECT_TRUE(RoundTrip(headers));
}
{
SpdyHeaderBlock headers;
headers[":authority"] = "www.example.com";
headers[":method"] = "GET";
headers[":path"] = "/index.html";
headers[":scheme"] = "https";
headers["custom-key"] = "custom-value";
headers["cookie"] = "baz=bing; fizzle=fazzle; garbage";
headers["multivalue"] = std::string("foo\0bar", 7);
EXPECT_TRUE(RoundTrip(headers));
}
}
TEST_P(HpackRoundTripTest, RandomizedExamples) {
// Grow vectors of names & values, which are seeded with fixtures and then
// expanded with dynamically generated data. Samples are taken using the
// exponential distribution.
std::vector<std::string> pseudo_header_names, random_header_names;
pseudo_header_names.push_back(":authority");
pseudo_header_names.push_back(":path");
pseudo_header_names.push_back(":status");
// TODO(jgraettinger): Enable "cookie" as a name fixture. Crumbs may be
// reconstructed in any order, which breaks the simple validation used here.
std::vector<std::string> values;
values.push_back("/");
values.push_back("/index.html");
values.push_back("200");
values.push_back("404");
values.push_back("");
values.push_back("baz=bing; foo=bar; garbage");
values.push_back("baz=bing; fizzle=fazzle; garbage");
for (size_t i = 0; i != 2000; ++i) {
SpdyHeaderBlock headers;
// Choose a random number of headers to add, and of these a random subset
// will be HTTP/2 pseudo headers.
size_t header_count = 1 + SampleExponential(7, 50);
size_t pseudo_header_count =
std::min(header_count, 1 + SampleExponential(7, 50));
EXPECT_LE(pseudo_header_count, header_count);
for (size_t j = 0; j != header_count; ++j) {
std::string name, value;
// Pseudo headers must be added before regular headers.
if (j < pseudo_header_count) {
// Choose one of the defined pseudo headers at random.
size_t name_index = random_.Uniform(pseudo_header_names.size());
name = pseudo_header_names[name_index];
} else {
// Randomly reuse an existing header name, or generate a new one.
size_t name_index = SampleExponential(20, 200);
if (name_index >= random_header_names.size()) {
name = random_.RandString(1 + SampleExponential(5, 30));
// A regular header cannot begin with the pseudo header prefix ":".
if (name[0] == ':') {
name[0] = 'x';
}
random_header_names.push_back(name);
} else {
name = random_header_names[name_index];
}
}
// Randomly reuse an existing value, or generate a new one.
size_t value_index = SampleExponential(20, 200);
if (value_index >= values.size()) {
std::string newvalue =
random_.RandString(1 + SampleExponential(15, 75));
// Currently order is not preserved in the encoder. In particular,
// when a value is decomposed at \0 delimiters, its parts might get
// encoded out of order if some but not all of them already exist in
// the header table. For now, avoid \0 bytes in values.
std::replace(newvalue.begin(), newvalue.end(), '\x00', '\x01');
values.push_back(newvalue);
value = values.back();
} else {
value = values[value_index];
}
headers[name] = value;
}
EXPECT_TRUE(RoundTrip(headers));
}
}
} // namespace
} // namespace test
} // namespace spdy
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