blob: dc6ab5813cf7e7676c9b43656c87c5b448d978f4 [file] [log] [blame]
// Copyright 2017 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 "http2/hpack/decoder/hpack_decoder.h"
// Tests of HpackDecoder.
#include <string>
#include <tuple>
#include <utility>
#include <vector>
#include "http2/decoder/decode_buffer.h"
#include "http2/hpack/decoder/hpack_decoder_listener.h"
#include "http2/hpack/decoder/hpack_decoder_state.h"
#include "http2/hpack/decoder/hpack_decoder_tables.h"
#include "http2/hpack/hpack_string.h"
#include "http2/hpack/http2_hpack_constants.h"
#include "http2/hpack/tools/hpack_block_builder.h"
#include "http2/hpack/tools/hpack_example.h"
#include "http2/http2_constants.h"
#include "http2/platform/api/http2_logging.h"
#include "http2/platform/api/http2_test_helpers.h"
#include "http2/test_tools/http2_random.h"
#include "http2/tools/random_util.h"
#include "common/platform/api/quiche_test.h"
using ::testing::AssertionFailure;
using ::testing::AssertionResult;
using ::testing::AssertionSuccess;
using ::testing::ElementsAreArray;
using ::testing::Eq;
namespace http2 {
namespace test {
class HpackDecoderStatePeer {
public:
static HpackDecoderTables* GetDecoderTables(HpackDecoderState* state) {
return &state->decoder_tables_;
}
static void set_listener(HpackDecoderState* state,
HpackDecoderListener* listener) {
state->listener_ = listener;
}
};
class HpackDecoderPeer {
public:
static HpackDecoderState* GetDecoderState(HpackDecoder* decoder) {
return &decoder->decoder_state_;
}
static HpackDecoderTables* GetDecoderTables(HpackDecoder* decoder) {
return HpackDecoderStatePeer::GetDecoderTables(GetDecoderState(decoder));
}
};
namespace {
typedef std::pair<std::string, std::string> HpackHeaderEntry;
typedef std::vector<HpackHeaderEntry> HpackHeaderEntries;
// TODO(jamessynge): Create a ...test_utils.h file with the mock listener
// and with VerifyDynamicTableContents.
class MockHpackDecoderListener : public HpackDecoderListener {
public:
MOCK_METHOD0(OnHeaderListStart, void());
MOCK_METHOD2(OnHeader,
void(const HpackString& name, const HpackString& value));
MOCK_METHOD0(OnHeaderListEnd, void());
MOCK_METHOD(void,
OnHeaderErrorDetected,
(absl::string_view error_message),
(override));
};
class HpackDecoderTest : public QuicheTestWithParam<bool>,
public HpackDecoderListener {
protected:
// Note that we initialize the random number generator with the same seed
// for each individual test, therefore the order in which the tests are
// executed does not effect the sequence produced by the RNG within any
// one test.
HpackDecoderTest() : decoder_(this, 4096) {
fragment_the_hpack_block_ = GetParam();
}
~HpackDecoderTest() override = default;
void OnHeaderListStart() override {
ASSERT_FALSE(saw_start_);
ASSERT_FALSE(saw_end_);
saw_start_ = true;
header_entries_.clear();
}
// Called for each header name-value pair that is decoded, in the order they
// appear in the HPACK block. Multiple values for a given key will be emitted
// as multiple calls to OnHeader.
void OnHeader(const HpackString& name, const HpackString& value) override {
ASSERT_TRUE(saw_start_);
ASSERT_FALSE(saw_end_);
header_entries_.emplace_back(name.ToString(), value.ToString());
}
// OnHeaderBlockEnd is called after successfully decoding an HPACK block. Will
// only be called once per block, even if it extends into CONTINUATION frames.
// A callback method which notifies when the parser finishes handling a
// header block (i.e. the containing frame has the END_STREAM flag set).
// Also indicates the total number of bytes in this block.
void OnHeaderListEnd() override {
ASSERT_TRUE(saw_start_);
ASSERT_FALSE(saw_end_);
ASSERT_TRUE(error_messages_.empty());
saw_end_ = true;
}
// OnHeaderErrorDetected is called if an error is detected while decoding.
// error_message may be used in a GOAWAY frame as the Opaque Data.
void OnHeaderErrorDetected(absl::string_view error_message) override {
ASSERT_TRUE(saw_start_);
error_messages_.push_back(std::string(error_message));
// No further callbacks should be made at this point, so replace 'this' as
// the listener with mock_listener_, which is a strict mock, so will
// generate an error for any calls.
HpackDecoderStatePeer::set_listener(
HpackDecoderPeer::GetDecoderState(&decoder_), &mock_listener_);
}
AssertionResult DecodeBlock(absl::string_view block) {
HTTP2_VLOG(1) << "HpackDecoderTest::DecodeBlock";
VERIFY_FALSE(decoder_.DetectError());
VERIFY_TRUE(error_messages_.empty());
VERIFY_FALSE(saw_start_);
VERIFY_FALSE(saw_end_);
header_entries_.clear();
VERIFY_FALSE(decoder_.DetectError());
VERIFY_TRUE(decoder_.StartDecodingBlock());
VERIFY_FALSE(decoder_.DetectError());
if (fragment_the_hpack_block_) {
// See note in ctor regarding RNG.
while (!block.empty()) {
size_t fragment_size = random_.RandomSizeSkewedLow(block.size());
DecodeBuffer db(block.substr(0, fragment_size));
VERIFY_TRUE(decoder_.DecodeFragment(&db));
VERIFY_EQ(0u, db.Remaining());
block.remove_prefix(fragment_size);
}
} else {
DecodeBuffer db(block);
VERIFY_TRUE(decoder_.DecodeFragment(&db));
VERIFY_EQ(0u, db.Remaining());
}
VERIFY_FALSE(decoder_.DetectError());
VERIFY_TRUE(decoder_.EndDecodingBlock());
if (saw_end_) {
VERIFY_FALSE(decoder_.DetectError());
VERIFY_TRUE(error_messages_.empty());
} else {
VERIFY_TRUE(decoder_.DetectError());
VERIFY_FALSE(error_messages_.empty());
}
saw_start_ = saw_end_ = false;
return AssertionSuccess();
}
const HpackDecoderTables& GetDecoderTables() {
return *HpackDecoderPeer::GetDecoderTables(&decoder_);
}
const HpackStringPair* Lookup(size_t index) {
return GetDecoderTables().Lookup(index);
}
size_t current_header_table_size() {
return GetDecoderTables().current_header_table_size();
}
size_t header_table_size_limit() {
return GetDecoderTables().header_table_size_limit();
}
void set_header_table_size_limit(size_t size) {
HpackDecoderPeer::GetDecoderTables(&decoder_)->DynamicTableSizeUpdate(size);
}
// dynamic_index is one-based, because that is the way RFC 7541 shows it.
AssertionResult VerifyEntry(size_t dynamic_index,
const char* name,
const char* value) {
const HpackStringPair* entry =
Lookup(dynamic_index + kFirstDynamicTableIndex - 1);
VERIFY_NE(entry, nullptr);
VERIFY_EQ(entry->name.ToStringPiece(), name);
VERIFY_EQ(entry->value.ToStringPiece(), value);
return AssertionSuccess();
}
AssertionResult VerifyNoEntry(size_t dynamic_index) {
const HpackStringPair* entry =
Lookup(dynamic_index + kFirstDynamicTableIndex - 1);
VERIFY_EQ(entry, nullptr);
return AssertionSuccess();
}
AssertionResult VerifyDynamicTableContents(
const std::vector<std::pair<const char*, const char*>>& entries) {
size_t index = 1;
for (const auto& entry : entries) {
VERIFY_SUCCESS(VerifyEntry(index, entry.first, entry.second));
++index;
}
VERIFY_SUCCESS(VerifyNoEntry(index));
return AssertionSuccess();
}
Http2Random random_;
HpackDecoder decoder_;
testing::StrictMock<MockHpackDecoderListener> mock_listener_;
HpackHeaderEntries header_entries_;
std::vector<std::string> error_messages_;
bool fragment_the_hpack_block_;
bool saw_start_ = false;
bool saw_end_ = false;
};
INSTANTIATE_TEST_SUITE_P(AllWays, HpackDecoderTest, ::testing::Bool());
// Test based on RFC 7541, section C.3: Request Examples without Huffman Coding.
// This section shows several consecutive header lists, corresponding to HTTP
// requests, on the same connection.
// http://httpwg.org/specs/rfc7541.html#rfc.section.C.3
TEST_P(HpackDecoderTest, C3_RequestExamples) {
// C.3.1 First Request
std::string hpack_block = HpackExampleToStringOrDie(R"(
82 | == Indexed - Add ==
| idx = 2
| -> :method: GET
86 | == Indexed - Add ==
| idx = 6
| -> :scheme: http
84 | == Indexed - Add ==
| idx = 4
| -> :path: /
41 | == Literal indexed ==
| Indexed name (idx = 1)
| :authority
0f | Literal value (len = 15)
7777 772e 6578 616d 706c 652e 636f 6d | www.example.com
| -> :authority:
| www.example.com
)");
EXPECT_TRUE(DecodeBlock(hpack_block));
ASSERT_THAT(header_entries_,
ElementsAreArray({
HpackHeaderEntry{":method", "GET"},
HpackHeaderEntry{":scheme", "http"},
HpackHeaderEntry{":path", "/"},
HpackHeaderEntry{":authority", "www.example.com"},
}));
// Dynamic Table (after decoding):
//
// [ 1] (s = 57) :authority: www.example.com
// Table size: 57
ASSERT_TRUE(VerifyDynamicTableContents({{":authority", "www.example.com"}}));
ASSERT_EQ(57u, current_header_table_size());
// C.3.2 Second Request
hpack_block = HpackExampleToStringOrDie(R"(
82 | == Indexed - Add ==
| idx = 2
| -> :method: GET
86 | == Indexed - Add ==
| idx = 6
| -> :scheme: http
84 | == Indexed - Add ==
| idx = 4
| -> :path: /
be | == Indexed - Add ==
| idx = 62
| -> :authority:
| www.example.com
58 | == Literal indexed ==
| Indexed name (idx = 24)
| cache-control
08 | Literal value (len = 8)
6e6f 2d63 6163 6865 | no-cache
| -> cache-control: no-cache
)");
EXPECT_TRUE(DecodeBlock(hpack_block));
ASSERT_THAT(header_entries_,
ElementsAreArray({
HpackHeaderEntry{":method", "GET"},
HpackHeaderEntry{":scheme", "http"},
HpackHeaderEntry{":path", "/"},
HpackHeaderEntry{":authority", "www.example.com"},
HpackHeaderEntry{"cache-control", "no-cache"},
}));
// Dynamic Table (after decoding):
//
// [ 1] (s = 53) cache-control: no-cache
// [ 2] (s = 57) :authority: www.example.com
// Table size: 110
ASSERT_TRUE(VerifyDynamicTableContents(
{{"cache-control", "no-cache"}, {":authority", "www.example.com"}}));
ASSERT_EQ(110u, current_header_table_size());
// C.3.2 Third Request
hpack_block = HpackExampleToStringOrDie(R"(
82 | == Indexed - Add ==
| idx = 2
| -> :method: GET
87 | == Indexed - Add ==
| idx = 7
| -> :scheme: https
85 | == Indexed - Add ==
| idx = 5
| -> :path: /index.html
bf | == Indexed - Add ==
| idx = 63
| -> :authority:
| www.example.com
40 | == Literal indexed ==
0a | Literal name (len = 10)
6375 7374 6f6d 2d6b 6579 | custom-key
0c | Literal value (len = 12)
6375 7374 6f6d 2d76 616c 7565 | custom-value
| -> custom-key:
| custom-value
)");
EXPECT_TRUE(DecodeBlock(hpack_block));
ASSERT_THAT(header_entries_,
ElementsAreArray({
HpackHeaderEntry{":method", "GET"},
HpackHeaderEntry{":scheme", "https"},
HpackHeaderEntry{":path", "/index.html"},
HpackHeaderEntry{":authority", "www.example.com"},
HpackHeaderEntry{"custom-key", "custom-value"},
}));
// Dynamic Table (after decoding):
//
// [ 1] (s = 54) custom-key: custom-value
// [ 2] (s = 53) cache-control: no-cache
// [ 3] (s = 57) :authority: www.example.com
// Table size: 164
ASSERT_TRUE(VerifyDynamicTableContents({{"custom-key", "custom-value"},
{"cache-control", "no-cache"},
{":authority", "www.example.com"}}));
ASSERT_EQ(164u, current_header_table_size());
}
// Test based on RFC 7541, section C.4 Request Examples with Huffman Coding.
// This section shows the same examples as the previous section but uses
// Huffman encoding for the literal values.
// http://httpwg.org/specs/rfc7541.html#rfc.section.C.4
TEST_P(HpackDecoderTest, C4_RequestExamplesWithHuffmanEncoding) {
// C.4.1 First Request
std::string hpack_block = HpackExampleToStringOrDie(R"(
82 | == Indexed - Add ==
| idx = 2
| -> :method: GET
86 | == Indexed - Add ==
| idx = 6
| -> :scheme: http
84 | == Indexed - Add ==
| idx = 4
| -> :path: /
41 | == Literal indexed ==
| Indexed name (idx = 1)
| :authority
8c | Literal value (len = 12)
| Huffman encoded:
f1e3 c2e5 f23a 6ba0 ab90 f4ff | .....:k.....
| Decoded:
| www.example.com
| -> :authority:
| www.example.com
)");
EXPECT_TRUE(DecodeBlock(hpack_block));
ASSERT_THAT(header_entries_,
ElementsAreArray({
HpackHeaderEntry{":method", "GET"},
HpackHeaderEntry{":scheme", "http"},
HpackHeaderEntry{":path", "/"},
HpackHeaderEntry{":authority", "www.example.com"},
}));
// Dynamic Table (after decoding):
//
// [ 1] (s = 57) :authority: www.example.com
// Table size: 57
ASSERT_TRUE(VerifyDynamicTableContents({{":authority", "www.example.com"}}));
ASSERT_EQ(57u, current_header_table_size());
// C.4.2 Second Request
hpack_block = HpackExampleToStringOrDie(R"(
82 | == Indexed - Add ==
| idx = 2
| -> :method: GET
86 | == Indexed - Add ==
| idx = 6
| -> :scheme: http
84 | == Indexed - Add ==
| idx = 4
| -> :path: /
be | == Indexed - Add ==
| idx = 62
| -> :authority:
| www.example.com
58 | == Literal indexed ==
| Indexed name (idx = 24)
| cache-control
86 | Literal value (len = 6)
| Huffman encoded:
a8eb 1064 9cbf | ...d..
| Decoded:
| no-cache
| -> cache-control: no-cache
)");
EXPECT_TRUE(DecodeBlock(hpack_block));
ASSERT_THAT(header_entries_,
ElementsAreArray({
HpackHeaderEntry{":method", "GET"},
HpackHeaderEntry{":scheme", "http"},
HpackHeaderEntry{":path", "/"},
HpackHeaderEntry{":authority", "www.example.com"},
HpackHeaderEntry{"cache-control", "no-cache"},
}));
// Dynamic Table (after decoding):
//
// [ 1] (s = 53) cache-control: no-cache
// [ 2] (s = 57) :authority: www.example.com
// Table size: 110
ASSERT_TRUE(VerifyDynamicTableContents(
{{"cache-control", "no-cache"}, {":authority", "www.example.com"}}));
ASSERT_EQ(110u, current_header_table_size());
// C.4.2 Third Request
hpack_block = HpackExampleToStringOrDie(R"(
82 | == Indexed - Add ==
| idx = 2
| -> :method: GET
87 | == Indexed - Add ==
| idx = 7
| -> :scheme: https
85 | == Indexed - Add ==
| idx = 5
| -> :path: /index.html
bf | == Indexed - Add ==
| idx = 63
| -> :authority:
| www.example.com
40 | == Literal indexed ==
88 | Literal name (len = 8)
| Huffman encoded:
25a8 49e9 5ba9 7d7f | %.I.[.}.
| Decoded:
| custom-key
89 | Literal value (len = 9)
| Huffman encoded:
25a8 49e9 5bb8 e8b4 bf | %.I.[....
| Decoded:
| custom-value
| -> custom-key:
| custom-value
)");
EXPECT_TRUE(DecodeBlock(hpack_block));
ASSERT_THAT(header_entries_,
ElementsAreArray({
HpackHeaderEntry{":method", "GET"},
HpackHeaderEntry{":scheme", "https"},
HpackHeaderEntry{":path", "/index.html"},
HpackHeaderEntry{":authority", "www.example.com"},
HpackHeaderEntry{"custom-key", "custom-value"},
}));
// Dynamic Table (after decoding):
//
// [ 1] (s = 54) custom-key: custom-value
// [ 2] (s = 53) cache-control: no-cache
// [ 3] (s = 57) :authority: www.example.com
// Table size: 164
ASSERT_TRUE(VerifyDynamicTableContents({{"custom-key", "custom-value"},
{"cache-control", "no-cache"},
{":authority", "www.example.com"}}));
ASSERT_EQ(164u, current_header_table_size());
}
// Test based on RFC 7541, section C.5: Response Examples without Huffman
// Coding. This section shows several consecutive header lists, corresponding
// to HTTP responses, on the same connection. The HTTP/2 setting parameter
// SETTINGS_HEADER_TABLE_SIZE is set to the value of 256 octets, causing
// some evictions to occur.
// http://httpwg.org/specs/rfc7541.html#rfc.section.C.5
TEST_P(HpackDecoderTest, C5_ResponseExamples) {
set_header_table_size_limit(256);
// C.5.1 First Response
//
// Header list to encode:
//
// :status: 302
// cache-control: private
// date: Mon, 21 Oct 2013 20:13:21 GMT
// location: https://www.example.com
std::string hpack_block = HpackExampleToStringOrDie(R"(
48 | == Literal indexed ==
| Indexed name (idx = 8)
| :status
03 | Literal value (len = 3)
3330 32 | 302
| -> :status: 302
58 | == Literal indexed ==
| Indexed name (idx = 24)
| cache-control
07 | Literal value (len = 7)
7072 6976 6174 65 | private
| -> cache-control: private
61 | == Literal indexed ==
| Indexed name (idx = 33)
| date
1d | Literal value (len = 29)
4d6f 6e2c 2032 3120 4f63 7420 3230 3133 | Mon, 21 Oct 2013
2032 303a 3133 3a32 3120 474d 54 | 20:13:21 GMT
| -> date: Mon, 21 Oct 2013
| 20:13:21 GMT
6e | == Literal indexed ==
| Indexed name (idx = 46)
| location
17 | Literal value (len = 23)
6874 7470 733a 2f2f 7777 772e 6578 616d | https://www.exam
706c 652e 636f 6d | ple.com
| -> location:
| https://www.example.com
)");
EXPECT_TRUE(DecodeBlock(hpack_block));
ASSERT_THAT(header_entries_,
ElementsAreArray({
HpackHeaderEntry{":status", "302"},
HpackHeaderEntry{"cache-control", "private"},
HpackHeaderEntry{"date", "Mon, 21 Oct 2013 20:13:21 GMT"},
HpackHeaderEntry{"location", "https://www.example.com"},
}));
// Dynamic Table (after decoding):
//
// [ 1] (s = 63) location: https://www.example.com
// [ 2] (s = 65) date: Mon, 21 Oct 2013 20:13:21 GMT
// [ 3] (s = 52) cache-control: private
// [ 4] (s = 42) :status: 302
// Table size: 222
ASSERT_TRUE(
VerifyDynamicTableContents({{"location", "https://www.example.com"},
{"date", "Mon, 21 Oct 2013 20:13:21 GMT"},
{"cache-control", "private"},
{":status", "302"}}));
ASSERT_EQ(222u, current_header_table_size());
// C.5.2 Second Response
//
// The (":status", "302") header field is evicted from the dynamic table to
// free space to allow adding the (":status", "307") header field.
//
// Header list to encode:
//
// :status: 307
// cache-control: private
// date: Mon, 21 Oct 2013 20:13:21 GMT
// location: https://www.example.com
hpack_block = HpackExampleToStringOrDie(R"(
48 | == Literal indexed ==
| Indexed name (idx = 8)
| :status
03 | Literal value (len = 3)
3330 37 | 307
| - evict: :status: 302
| -> :status: 307
c1 | == Indexed - Add ==
| idx = 65
| -> cache-control: private
c0 | == Indexed - Add ==
| idx = 64
| -> date: Mon, 21 Oct 2013
| 20:13:21 GMT
bf | == Indexed - Add ==
| idx = 63
| -> location:
| https://www.example.com
)");
EXPECT_TRUE(DecodeBlock(hpack_block));
ASSERT_THAT(header_entries_,
ElementsAreArray({
HpackHeaderEntry{":status", "307"},
HpackHeaderEntry{"cache-control", "private"},
HpackHeaderEntry{"date", "Mon, 21 Oct 2013 20:13:21 GMT"},
HpackHeaderEntry{"location", "https://www.example.com"},
}));
// Dynamic Table (after decoding):
//
// [ 1] (s = 42) :status: 307
// [ 2] (s = 63) location: https://www.example.com
// [ 3] (s = 65) date: Mon, 21 Oct 2013 20:13:21 GMT
// [ 4] (s = 52) cache-control: private
// Table size: 222
ASSERT_TRUE(
VerifyDynamicTableContents({{":status", "307"},
{"location", "https://www.example.com"},
{"date", "Mon, 21 Oct 2013 20:13:21 GMT"},
{"cache-control", "private"}}));
ASSERT_EQ(222u, current_header_table_size());
// C.5.3 Third Response
//
// Several header fields are evicted from the dynamic table during the
// processing of this header list.
//
// Header list to encode:
//
// :status: 200
// cache-control: private
// date: Mon, 21 Oct 2013 20:13:22 GMT
// location: https://www.example.com
// content-encoding: gzip
// set-cookie: foo=ASDJKHQKBZXOQWEOPIUAXQWEOIU; max-age=3600; version=1
hpack_block = HpackExampleToStringOrDie(R"(
88 | == Indexed - Add ==
| idx = 8
| -> :status: 200
c1 | == Indexed - Add ==
| idx = 65
| -> cache-control: private
61 | == Literal indexed ==
| Indexed name (idx = 33)
| date
1d | Literal value (len = 29)
4d6f 6e2c 2032 3120 4f63 7420 3230 3133 | Mon, 21 Oct 2013
2032 303a 3133 3a32 3220 474d 54 | 20:13:22 GMT
| - evict: cache-control:
| private
| -> date: Mon, 21 Oct 2013
| 20:13:22 GMT
c0 | == Indexed - Add ==
| idx = 64
| -> location:
| https://www.example.com
5a | == Literal indexed ==
| Indexed name (idx = 26)
| content-encoding
04 | Literal value (len = 4)
677a 6970 | gzip
| - evict: date: Mon, 21 Oct
| 2013 20:13:21 GMT
| -> content-encoding: gzip
77 | == Literal indexed ==
| Indexed name (idx = 55)
| set-cookie
38 | Literal value (len = 56)
666f 6f3d 4153 444a 4b48 514b 425a 584f | foo=ASDJKHQKBZXO
5157 454f 5049 5541 5851 5745 4f49 553b | QWEOPIUAXQWEOIU;
206d 6178 2d61 6765 3d33 3630 303b 2076 | max-age=3600; v
6572 7369 6f6e 3d31 | ersion=1
| - evict: location:
| https://www.example.com
| - evict: :status: 307
| -> set-cookie: foo=ASDJKHQ
| KBZXOQWEOPIUAXQWEOIU; ma
| x-age=3600; version=1
)");
EXPECT_TRUE(DecodeBlock(hpack_block));
ASSERT_THAT(
header_entries_,
ElementsAreArray({
HpackHeaderEntry{":status", "200"},
HpackHeaderEntry{"cache-control", "private"},
HpackHeaderEntry{"date", "Mon, 21 Oct 2013 20:13:22 GMT"},
HpackHeaderEntry{"location", "https://www.example.com"},
HpackHeaderEntry{"content-encoding", "gzip"},
HpackHeaderEntry{
"set-cookie",
"foo=ASDJKHQKBZXOQWEOPIUAXQWEOIU; max-age=3600; version=1"},
}));
// Dynamic Table (after decoding):
//
// [ 1] (s = 98) set-cookie: foo=ASDJKHQKBZXOQWEOPIUAXQWEOIU;
// max-age=3600; version=1
// [ 2] (s = 52) content-encoding: gzip
// [ 3] (s = 65) date: Mon, 21 Oct 2013 20:13:22 GMT
// Table size: 215
ASSERT_TRUE(VerifyDynamicTableContents(
{{"set-cookie",
"foo=ASDJKHQKBZXOQWEOPIUAXQWEOIU; max-age=3600; version=1"},
{"content-encoding", "gzip"},
{"date", "Mon, 21 Oct 2013 20:13:22 GMT"}}));
ASSERT_EQ(215u, current_header_table_size());
}
// Test based on RFC 7541, section C.6: Response Examples with Huffman Coding.
// This section shows the same examples as the previous section but uses Huffman
// encoding for the literal values. The HTTP/2 setting parameter
// SETTINGS_HEADER_TABLE_SIZE is set to the value of 256 octets, causing some
// evictions to occur. The eviction mechanism uses the length of the decoded
// literal values, so the same evictions occur as in the previous section.
// http://httpwg.org/specs/rfc7541.html#rfc.section.C.6
TEST_P(HpackDecoderTest, C6_ResponseExamplesWithHuffmanEncoding) {
set_header_table_size_limit(256);
// C.5.1 First Response
//
// Header list to encode:
//
// :status: 302
// cache-control: private
// date: Mon, 21 Oct 2013 20:13:21 GMT
// location: https://www.example.com
std::string hpack_block = HpackExampleToStringOrDie(R"(
48 | == Literal indexed ==
| Indexed name (idx = 8)
| :status
03 | Literal value (len = 3)
3330 32 | 302
| -> :status: 302
58 | == Literal indexed ==
| Indexed name (idx = 24)
| cache-control
07 | Literal value (len = 7)
7072 6976 6174 65 | private
| -> cache-control: private
61 | == Literal indexed ==
| Indexed name (idx = 33)
| date
1d | Literal value (len = 29)
4d6f 6e2c 2032 3120 4f63 7420 3230 3133 | Mon, 21 Oct 2013
2032 303a 3133 3a32 3120 474d 54 | 20:13:21 GMT
| -> date: Mon, 21 Oct 2013
| 20:13:21 GMT
6e | == Literal indexed ==
| Indexed name (idx = 46)
| location
17 | Literal value (len = 23)
6874 7470 733a 2f2f 7777 772e 6578 616d | https://www.exam
706c 652e 636f 6d | ple.com
| -> location:
| https://www.example.com
)");
EXPECT_TRUE(DecodeBlock(hpack_block));
ASSERT_THAT(header_entries_,
ElementsAreArray({
HpackHeaderEntry{":status", "302"},
HpackHeaderEntry{"cache-control", "private"},
HpackHeaderEntry{"date", "Mon, 21 Oct 2013 20:13:21 GMT"},
HpackHeaderEntry{"location", "https://www.example.com"},
}));
// Dynamic Table (after decoding):
//
// [ 1] (s = 63) location: https://www.example.com
// [ 2] (s = 65) date: Mon, 21 Oct 2013 20:13:21 GMT
// [ 3] (s = 52) cache-control: private
// [ 4] (s = 42) :status: 302
// Table size: 222
ASSERT_TRUE(
VerifyDynamicTableContents({{"location", "https://www.example.com"},
{"date", "Mon, 21 Oct 2013 20:13:21 GMT"},
{"cache-control", "private"},
{":status", "302"}}));
ASSERT_EQ(222u, current_header_table_size());
// C.5.2 Second Response
//
// The (":status", "302") header field is evicted from the dynamic table to
// free space to allow adding the (":status", "307") header field.
//
// Header list to encode:
//
// :status: 307
// cache-control: private
// date: Mon, 21 Oct 2013 20:13:21 GMT
// location: https://www.example.com
hpack_block = HpackExampleToStringOrDie(R"(
48 | == Literal indexed ==
| Indexed name (idx = 8)
| :status
03 | Literal value (len = 3)
3330 37 | 307
| - evict: :status: 302
| -> :status: 307
c1 | == Indexed - Add ==
| idx = 65
| -> cache-control: private
c0 | == Indexed - Add ==
| idx = 64
| -> date: Mon, 21 Oct 2013
| 20:13:21 GMT
bf | == Indexed - Add ==
| idx = 63
| -> location:
| https://www.example.com
)");
EXPECT_TRUE(DecodeBlock(hpack_block));
ASSERT_THAT(header_entries_,
ElementsAreArray({
HpackHeaderEntry{":status", "307"},
HpackHeaderEntry{"cache-control", "private"},
HpackHeaderEntry{"date", "Mon, 21 Oct 2013 20:13:21 GMT"},
HpackHeaderEntry{"location", "https://www.example.com"},
}));
// Dynamic Table (after decoding):
//
// [ 1] (s = 42) :status: 307
// [ 2] (s = 63) location: https://www.example.com
// [ 3] (s = 65) date: Mon, 21 Oct 2013 20:13:21 GMT
// [ 4] (s = 52) cache-control: private
// Table size: 222
ASSERT_TRUE(
VerifyDynamicTableContents({{":status", "307"},
{"location", "https://www.example.com"},
{"date", "Mon, 21 Oct 2013 20:13:21 GMT"},
{"cache-control", "private"}}));
ASSERT_EQ(222u, current_header_table_size());
// C.5.3 Third Response
//
// Several header fields are evicted from the dynamic table during the
// processing of this header list.
//
// Header list to encode:
//
// :status: 200
// cache-control: private
// date: Mon, 21 Oct 2013 20:13:22 GMT
// location: https://www.example.com
// content-encoding: gzip
// set-cookie: foo=ASDJKHQKBZXOQWEOPIUAXQWEOIU; max-age=3600; version=1
hpack_block = HpackExampleToStringOrDie(R"(
88 | == Indexed - Add ==
| idx = 8
| -> :status: 200
c1 | == Indexed - Add ==
| idx = 65
| -> cache-control: private
61 | == Literal indexed ==
| Indexed name (idx = 33)
| date
1d | Literal value (len = 29)
4d6f 6e2c 2032 3120 4f63 7420 3230 3133 | Mon, 21 Oct 2013
2032 303a 3133 3a32 3220 474d 54 | 20:13:22 GMT
| - evict: cache-control:
| private
| -> date: Mon, 21 Oct 2013
| 20:13:22 GMT
c0 | == Indexed - Add ==
| idx = 64
| -> location:
| https://www.example.com
5a | == Literal indexed ==
| Indexed name (idx = 26)
| content-encoding
04 | Literal value (len = 4)
677a 6970 | gzip
| - evict: date: Mon, 21 Oct
| 2013 20:13:21 GMT
| -> content-encoding: gzip
77 | == Literal indexed ==
| Indexed name (idx = 55)
| set-cookie
38 | Literal value (len = 56)
666f 6f3d 4153 444a 4b48 514b 425a 584f | foo=ASDJKHQKBZXO
5157 454f 5049 5541 5851 5745 4f49 553b | QWEOPIUAXQWEOIU;
206d 6178 2d61 6765 3d33 3630 303b 2076 | max-age=3600; v
6572 7369 6f6e 3d31 | ersion=1
| - evict: location:
| https://www.example.com
| - evict: :status: 307
| -> set-cookie: foo=ASDJKHQ
| KBZXOQWEOPIUAXQWEOIU; ma
| x-age=3600; version=1
)");
EXPECT_TRUE(DecodeBlock(hpack_block));
ASSERT_THAT(
header_entries_,
ElementsAreArray({
HpackHeaderEntry{":status", "200"},
HpackHeaderEntry{"cache-control", "private"},
HpackHeaderEntry{"date", "Mon, 21 Oct 2013 20:13:22 GMT"},
HpackHeaderEntry{"location", "https://www.example.com"},
HpackHeaderEntry{"content-encoding", "gzip"},
HpackHeaderEntry{
"set-cookie",
"foo=ASDJKHQKBZXOQWEOPIUAXQWEOIU; max-age=3600; version=1"},
}));
// Dynamic Table (after decoding):
//
// [ 1] (s = 98) set-cookie: foo=ASDJKHQKBZXOQWEOPIUAXQWEOIU;
// max-age=3600; version=1
// [ 2] (s = 52) content-encoding: gzip
// [ 3] (s = 65) date: Mon, 21 Oct 2013 20:13:22 GMT
// Table size: 215
ASSERT_TRUE(VerifyDynamicTableContents(
{{"set-cookie",
"foo=ASDJKHQKBZXOQWEOPIUAXQWEOIU; max-age=3600; version=1"},
{"content-encoding", "gzip"},
{"date", "Mon, 21 Oct 2013 20:13:22 GMT"}}));
ASSERT_EQ(215u, current_header_table_size());
}
// Confirm that the table size can be changed, but at most twice.
TEST_P(HpackDecoderTest, ProcessesOptionalTableSizeUpdates) {
EXPECT_EQ(Http2SettingsInfo::DefaultHeaderTableSize(),
header_table_size_limit());
// One update allowed.
{
HpackBlockBuilder hbb;
hbb.AppendDynamicTableSizeUpdate(3000);
EXPECT_TRUE(DecodeBlock(hbb.buffer()));
EXPECT_EQ(3000u, header_table_size_limit());
EXPECT_EQ(0u, current_header_table_size());
EXPECT_TRUE(header_entries_.empty());
}
// Two updates allowed.
{
HpackBlockBuilder hbb;
hbb.AppendDynamicTableSizeUpdate(2000);
hbb.AppendDynamicTableSizeUpdate(2500);
EXPECT_TRUE(DecodeBlock(hbb.buffer()));
EXPECT_EQ(2500u, header_table_size_limit());
EXPECT_EQ(0u, current_header_table_size());
EXPECT_TRUE(header_entries_.empty());
}
// A third update in the same HPACK block is rejected, so the final
// size is 1000, not 500.
{
HpackBlockBuilder hbb;
hbb.AppendDynamicTableSizeUpdate(1500);
hbb.AppendDynamicTableSizeUpdate(1000);
hbb.AppendDynamicTableSizeUpdate(500);
EXPECT_FALSE(DecodeBlock(hbb.buffer()));
EXPECT_EQ(HpackDecodingError::kDynamicTableSizeUpdateNotAllowed,
decoder_.error());
EXPECT_EQ(1u, error_messages_.size());
EXPECT_THAT(error_messages_[0],
Eq("Dynamic table size update not allowed"));
EXPECT_EQ(1000u, header_table_size_limit());
EXPECT_EQ(0u, current_header_table_size());
EXPECT_TRUE(header_entries_.empty());
}
// An error has been detected, so calls to HpackDecoder::DecodeFragment
// should return immediately.
DecodeBuffer db("\x80");
EXPECT_FALSE(decoder_.DecodeFragment(&db));
EXPECT_EQ(0u, db.Offset());
EXPECT_EQ(1u, error_messages_.size());
}
// Confirm that the table size can be changed when required, but at most twice.
TEST_P(HpackDecoderTest, ProcessesRequiredTableSizeUpdate) {
// One update required, two allowed, one provided, followed by a header.
decoder_.ApplyHeaderTableSizeSetting(1024);
decoder_.ApplyHeaderTableSizeSetting(2048);
EXPECT_EQ(Http2SettingsInfo::DefaultHeaderTableSize(),
header_table_size_limit());
{
HpackBlockBuilder hbb;
hbb.AppendDynamicTableSizeUpdate(1024);
hbb.AppendIndexedHeader(4); // :path: /
EXPECT_TRUE(DecodeBlock(hbb.buffer()));
EXPECT_THAT(header_entries_,
ElementsAreArray({HpackHeaderEntry{":path", "/"}}));
EXPECT_EQ(1024u, header_table_size_limit());
EXPECT_EQ(0u, current_header_table_size());
}
// One update required, two allowed, two provided, followed by a header.
decoder_.ApplyHeaderTableSizeSetting(1000);
decoder_.ApplyHeaderTableSizeSetting(1500);
{
HpackBlockBuilder hbb;
hbb.AppendDynamicTableSizeUpdate(500);
hbb.AppendDynamicTableSizeUpdate(1250);
hbb.AppendIndexedHeader(5); // :path: /index.html
EXPECT_TRUE(DecodeBlock(hbb.buffer()));
EXPECT_THAT(header_entries_,
ElementsAreArray({HpackHeaderEntry{":path", "/index.html"}}));
EXPECT_EQ(1250u, header_table_size_limit());
EXPECT_EQ(0u, current_header_table_size());
}
// One update required, two allowed, three provided, followed by a header.
// The third update is rejected, so the final size is 1000, not 500.
decoder_.ApplyHeaderTableSizeSetting(500);
decoder_.ApplyHeaderTableSizeSetting(1000);
{
HpackBlockBuilder hbb;
hbb.AppendDynamicTableSizeUpdate(200);
hbb.AppendDynamicTableSizeUpdate(700);
hbb.AppendDynamicTableSizeUpdate(900);
hbb.AppendIndexedHeader(5); // Not decoded.
EXPECT_FALSE(DecodeBlock(hbb.buffer()));
EXPECT_FALSE(saw_end_);
EXPECT_EQ(HpackDecodingError::kDynamicTableSizeUpdateNotAllowed,
decoder_.error());
EXPECT_EQ(1u, error_messages_.size());
EXPECT_THAT(error_messages_[0],
Eq("Dynamic table size update not allowed"));
EXPECT_EQ(700u, header_table_size_limit());
EXPECT_EQ(0u, current_header_table_size());
EXPECT_TRUE(header_entries_.empty());
}
// Now that an error has been detected, StartDecodingBlock should return
// false.
EXPECT_FALSE(decoder_.StartDecodingBlock());
}
// Confirm that required size updates are validated.
TEST_P(HpackDecoderTest, InvalidRequiredSizeUpdate) {
// Require a size update, but provide one that isn't small enough (must be
// zero or one, in this case).
decoder_.ApplyHeaderTableSizeSetting(1);
decoder_.ApplyHeaderTableSizeSetting(1024);
HpackBlockBuilder hbb;
hbb.AppendDynamicTableSizeUpdate(2);
EXPECT_TRUE(decoder_.StartDecodingBlock());
DecodeBuffer db(hbb.buffer());
EXPECT_FALSE(decoder_.DecodeFragment(&db));
EXPECT_FALSE(saw_end_);
EXPECT_EQ(
HpackDecodingError::kInitialDynamicTableSizeUpdateIsAboveLowWaterMark,
decoder_.error());
EXPECT_EQ(1u, error_messages_.size());
EXPECT_THAT(error_messages_[0],
Eq("Initial dynamic table size update is above low water mark"));
EXPECT_EQ(Http2SettingsInfo::DefaultHeaderTableSize(),
header_table_size_limit());
}
// Confirm that required size updates are indeed required before the end.
TEST_P(HpackDecoderTest, RequiredTableSizeChangeBeforeEnd) {
decoder_.ApplyHeaderTableSizeSetting(1024);
EXPECT_FALSE(DecodeBlock(""));
EXPECT_EQ(HpackDecodingError::kMissingDynamicTableSizeUpdate,
decoder_.error());
EXPECT_EQ(1u, error_messages_.size());
EXPECT_THAT(error_messages_[0], Eq("Missing dynamic table size update"));
EXPECT_FALSE(saw_end_);
}
// Confirm that required size updates are indeed required before an
// indexed header.
TEST_P(HpackDecoderTest, RequiredTableSizeChangeBeforeIndexedHeader) {
decoder_.ApplyHeaderTableSizeSetting(1024);
HpackBlockBuilder hbb;
hbb.AppendIndexedHeader(1);
EXPECT_FALSE(DecodeBlock(hbb.buffer()));
EXPECT_EQ(HpackDecodingError::kMissingDynamicTableSizeUpdate,
decoder_.error());
EXPECT_EQ(1u, error_messages_.size());
EXPECT_THAT(error_messages_[0], Eq("Missing dynamic table size update"));
EXPECT_FALSE(saw_end_);
EXPECT_TRUE(header_entries_.empty());
}
// Confirm that required size updates are indeed required before an indexed
// header name.
// TODO(jamessynge): Move some of these to hpack_decoder_state_test.cc.
TEST_P(HpackDecoderTest, RequiredTableSizeChangeBeforeIndexedHeaderName) {
decoder_.ApplyHeaderTableSizeSetting(1024);
HpackBlockBuilder hbb;
hbb.AppendNameIndexAndLiteralValue(HpackEntryType::kIndexedLiteralHeader, 2,
false, "PUT");
EXPECT_FALSE(DecodeBlock(hbb.buffer()));
EXPECT_EQ(HpackDecodingError::kMissingDynamicTableSizeUpdate,
decoder_.error());
EXPECT_EQ(1u, error_messages_.size());
EXPECT_THAT(error_messages_[0], Eq("Missing dynamic table size update"));
EXPECT_FALSE(saw_end_);
EXPECT_TRUE(header_entries_.empty());
}
// Confirm that required size updates are indeed required before a literal
// header name.
TEST_P(HpackDecoderTest, RequiredTableSizeChangeBeforeLiteralName) {
decoder_.ApplyHeaderTableSizeSetting(1024);
HpackBlockBuilder hbb;
hbb.AppendLiteralNameAndValue(HpackEntryType::kNeverIndexedLiteralHeader,
false, "name", false, "some data.");
EXPECT_FALSE(DecodeBlock(hbb.buffer()));
EXPECT_EQ(HpackDecodingError::kMissingDynamicTableSizeUpdate,
decoder_.error());
EXPECT_EQ(1u, error_messages_.size());
EXPECT_THAT(error_messages_[0], Eq("Missing dynamic table size update"));
EXPECT_FALSE(saw_end_);
EXPECT_TRUE(header_entries_.empty());
}
// Confirm that an excessively long varint is detected, in this case an
// index of 127, but with lots of additional high-order 0 bits provided,
// too many to be allowed.
TEST_P(HpackDecoderTest, InvalidIndexedHeaderVarint) {
EXPECT_TRUE(decoder_.StartDecodingBlock());
DecodeBuffer db("\xff\x80\x80\x80\x80\x80\x80\x80\x80\x80\x80\x00");
EXPECT_FALSE(decoder_.DecodeFragment(&db));
EXPECT_TRUE(decoder_.DetectError());
EXPECT_FALSE(saw_end_);
EXPECT_EQ(HpackDecodingError::kIndexVarintError, decoder_.error());
EXPECT_EQ(1u, error_messages_.size());
EXPECT_THAT(error_messages_[0],
Eq("Index varint beyond implementation limit"));
EXPECT_TRUE(header_entries_.empty());
// Now that an error has been detected, EndDecodingBlock should not succeed.
EXPECT_FALSE(decoder_.EndDecodingBlock());
}
// Confirm that an invalid index into the tables is detected, in this case an
// index of 0.
TEST_P(HpackDecoderTest, InvalidIndex) {
EXPECT_TRUE(decoder_.StartDecodingBlock());
DecodeBuffer db("\x80");
EXPECT_FALSE(decoder_.DecodeFragment(&db));
EXPECT_TRUE(decoder_.DetectError());
EXPECT_FALSE(saw_end_);
EXPECT_EQ(HpackDecodingError::kInvalidIndex, decoder_.error());
EXPECT_EQ(1u, error_messages_.size());
EXPECT_THAT(error_messages_[0],
Eq("Invalid index in indexed header field representation"));
EXPECT_TRUE(header_entries_.empty());
// Now that an error has been detected, EndDecodingBlock should not succeed.
EXPECT_FALSE(decoder_.EndDecodingBlock());
}
// Confirm that EndDecodingBlock detects a truncated HPACK block.
TEST_P(HpackDecoderTest, TruncatedBlock) {
HpackBlockBuilder hbb;
hbb.AppendDynamicTableSizeUpdate(3000);
EXPECT_EQ(3u, hbb.size());
hbb.AppendDynamicTableSizeUpdate(4000);
EXPECT_EQ(6u, hbb.size());
// Decodes this block if the whole thing is provided.
EXPECT_TRUE(DecodeBlock(hbb.buffer()));
EXPECT_EQ(4000u, header_table_size_limit());
// Multiple times even.
EXPECT_TRUE(DecodeBlock(hbb.buffer()));
EXPECT_EQ(4000u, header_table_size_limit());
// But not if the block is truncated.
EXPECT_FALSE(DecodeBlock(hbb.buffer().substr(0, hbb.size() - 1)));
EXPECT_FALSE(saw_end_);
EXPECT_EQ(HpackDecodingError::kTruncatedBlock, decoder_.error());
EXPECT_EQ(1u, error_messages_.size());
EXPECT_THAT(error_messages_[0],
Eq("Block ends in the middle of an instruction"));
// The first update was decoded.
EXPECT_EQ(3000u, header_table_size_limit());
EXPECT_EQ(0u, current_header_table_size());
EXPECT_TRUE(header_entries_.empty());
}
// Confirm that an oversized string is detected, ending decoding.
TEST_P(HpackDecoderTest, OversizeStringDetected) {
HpackBlockBuilder hbb;
hbb.AppendLiteralNameAndValue(HpackEntryType::kNeverIndexedLiteralHeader,
false, "name", false, "some data.");
hbb.AppendLiteralNameAndValue(HpackEntryType::kUnindexedLiteralHeader, false,
"name2", false, "longer data");
// Normally able to decode this block.
EXPECT_TRUE(DecodeBlock(hbb.buffer()));
EXPECT_THAT(header_entries_,
ElementsAreArray({HpackHeaderEntry{"name", "some data."},
HpackHeaderEntry{"name2", "longer data"}}));
// But not if the maximum size of strings is less than the longest string.
decoder_.set_max_string_size_bytes(10);
EXPECT_FALSE(DecodeBlock(hbb.buffer()));
EXPECT_THAT(header_entries_,
ElementsAreArray({HpackHeaderEntry{"name", "some data."}}));
EXPECT_FALSE(saw_end_);
EXPECT_EQ(HpackDecodingError::kValueTooLong, decoder_.error());
EXPECT_EQ(1u, error_messages_.size());
EXPECT_THAT(error_messages_[0], Eq("Value length exceeds buffer limit"));
}
} // namespace
} // namespace test
} // namespace http2