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#include "http2/adapter/test_utils.h"
#include <ostream>
#include "absl/strings/str_format.h"
#include "http2/adapter/http2_visitor_interface.h"
#include "common/quiche_data_reader.h"
#include "spdy/core/hpack/hpack_encoder.h"
namespace http2 {
namespace adapter {
namespace test {
namespace {
using ConnectionError = Http2VisitorInterface::ConnectionError;
} // anonymous namespace
TestDataFrameSource::TestDataFrameSource(Http2VisitorInterface& visitor,
bool has_fin)
: visitor_(visitor), has_fin_(has_fin) {}
void TestDataFrameSource::AppendPayload(absl::string_view payload) {
QUICHE_CHECK(!end_data_);
if (!payload.empty()) {
payload_fragments_.push_back(std::string(payload));
current_fragment_ = payload_fragments_.front();
}
}
void TestDataFrameSource::EndData() { end_data_ = true; }
std::pair<int64_t, bool> TestDataFrameSource::SelectPayloadLength(
size_t max_length) {
if (return_error_) {
return {DataFrameSource::kError, false};
}
// The stream is done if there's no more data, or if |max_length| is at least
// as large as the remaining data.
const bool end_data = end_data_ && (current_fragment_.empty() ||
(payload_fragments_.size() == 1 &&
max_length >= current_fragment_.size()));
const int64_t length = std::min(max_length, current_fragment_.size());
return {length, end_data};
}
bool TestDataFrameSource::Send(absl::string_view frame_header,
size_t payload_length) {
QUICHE_LOG_IF(DFATAL, payload_length > current_fragment_.size())
<< "payload_length: " << payload_length
<< " current_fragment_size: " << current_fragment_.size();
const std::string concatenated =
absl::StrCat(frame_header, current_fragment_.substr(0, payload_length));
const int64_t result = visitor_.OnReadyToSend(concatenated);
if (result < 0) {
// Write encountered error.
visitor_.OnConnectionError(ConnectionError::kSendError);
current_fragment_ = {};
payload_fragments_.clear();
return false;
} else if (result == 0) {
// Write blocked.
return false;
} else if (static_cast<const size_t>(result) < concatenated.size()) {
// Probably need to handle this better within this test class.
QUICHE_LOG(DFATAL)
<< "DATA frame not fully flushed. Connection will be corrupt!";
visitor_.OnConnectionError(ConnectionError::kSendError);
current_fragment_ = {};
payload_fragments_.clear();
return false;
}
if (payload_length > 0) {
current_fragment_.remove_prefix(payload_length);
}
if (current_fragment_.empty() && !payload_fragments_.empty()) {
payload_fragments_.erase(payload_fragments_.begin());
if (!payload_fragments_.empty()) {
current_fragment_ = payload_fragments_.front();
}
}
return true;
}
std::string EncodeHeaders(const spdy::SpdyHeaderBlock& entries) {
spdy::HpackEncoder encoder;
encoder.DisableCompression();
return encoder.EncodeHeaderBlock(entries);
}
TestMetadataSource::TestMetadataSource(const spdy::SpdyHeaderBlock& entries)
: encoded_entries_(EncodeHeaders(entries)) {
remaining_ = encoded_entries_;
}
std::pair<int64_t, bool> TestMetadataSource::Pack(uint8_t* dest,
size_t dest_len) {
const size_t copied = std::min(dest_len, remaining_.size());
std::memcpy(dest, remaining_.data(), copied);
remaining_.remove_prefix(copied);
return std::make_pair(copied, remaining_.empty());
}
namespace {
using TypeAndOptionalLength =
std::pair<spdy::SpdyFrameType, absl::optional<size_t>>;
std::ostream& operator<<(
std::ostream& os,
const std::vector<TypeAndOptionalLength>& types_and_lengths) {
for (const auto& type_and_length : types_and_lengths) {
os << "(" << spdy::FrameTypeToString(type_and_length.first) << ", "
<< (type_and_length.second ? absl::StrCat(type_and_length.second.value())
: "<unspecified>")
<< ") ";
}
return os;
}
std::string FrameTypeToString(uint8_t frame_type) {
if (spdy::IsDefinedFrameType(frame_type)) {
return spdy::FrameTypeToString(spdy::ParseFrameType(frame_type));
} else {
return absl::StrFormat("0x%x", static_cast<int>(frame_type));
}
}
// Custom gMock matcher, used to implement EqualsFrames().
class SpdyControlFrameMatcher
: public testing::MatcherInterface<absl::string_view> {
public:
explicit SpdyControlFrameMatcher(
std::vector<TypeAndOptionalLength> types_and_lengths)
: expected_types_and_lengths_(std::move(types_and_lengths)) {}
bool MatchAndExplain(absl::string_view s,
testing::MatchResultListener* listener) const override {
quiche::QuicheDataReader reader(s.data(), s.size());
for (TypeAndOptionalLength expected : expected_types_and_lengths_) {
if (!MatchAndExplainOneFrame(expected.first, expected.second, &reader,
listener)) {
return false;
}
}
if (!reader.IsDoneReading()) {
*listener << "; " << reader.BytesRemaining() << " bytes left to read!";
return false;
}
return true;
}
bool MatchAndExplainOneFrame(spdy::SpdyFrameType expected_type,
absl::optional<size_t> expected_length,
quiche::QuicheDataReader* reader,
testing::MatchResultListener* listener) const {
uint32_t payload_length;
if (!reader->ReadUInt24(&payload_length)) {
*listener << "; unable to read length field for expected_type "
<< FrameTypeToString(expected_type) << ". data too short!";
return false;
}
if (expected_length && payload_length != expected_length.value()) {
*listener << "; actual length: " << payload_length
<< " but expected length: " << expected_length.value();
return false;
}
uint8_t raw_type;
if (!reader->ReadUInt8(&raw_type)) {
*listener << "; unable to read type field for expected_type "
<< FrameTypeToString(expected_type) << ". data too short!";
return false;
}
if (raw_type != static_cast<uint8_t>(expected_type)) {
*listener << "; actual type: " << FrameTypeToString(raw_type)
<< " but expected type: " << FrameTypeToString(expected_type);
return false;
}
// Seek past flags (1B), stream ID (4B), and payload. Reach the next frame.
reader->Seek(5 + payload_length);
return true;
}
void DescribeTo(std::ostream* os) const override {
*os << "Data contains frames of types in sequence "
<< expected_types_and_lengths_;
}
void DescribeNegationTo(std::ostream* os) const override {
*os << "Data does not contain frames of types in sequence "
<< expected_types_and_lengths_;
}
private:
const std::vector<TypeAndOptionalLength> expected_types_and_lengths_;
};
} // namespace
testing::Matcher<absl::string_view> EqualsFrames(
std::vector<std::pair<spdy::SpdyFrameType, absl::optional<size_t>>>
types_and_lengths) {
return MakeMatcher(new SpdyControlFrameMatcher(std::move(types_and_lengths)));
}
testing::Matcher<absl::string_view> EqualsFrames(
std::vector<spdy::SpdyFrameType> types) {
std::vector<std::pair<spdy::SpdyFrameType, absl::optional<size_t>>>
types_and_lengths;
types_and_lengths.reserve(types.size());
for (spdy::SpdyFrameType type : types) {
types_and_lengths.push_back({type, absl::nullopt});
}
return MakeMatcher(new SpdyControlFrameMatcher(std::move(types_and_lengths)));
}
} // namespace test
} // namespace adapter
} // namespace http2
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