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// Copyright (c) 2009 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 <iostream>
#include "base/scoped_ptr.h"
#include "flip_framer.h" // cross-google3 directory naming.
#include "flip_protocol.h"
#include "flip_frame_builder.h"
#include "testing/platform_test.h"
namespace flip {
class FlipFramerTest : public PlatformTest {
public:
virtual void TearDown() {}
};
class TestFlipVisitor : public FlipFramerVisitorInterface {
public:
explicit TestFlipVisitor(FlipFramer* framer)
: framer_(framer),
error_count_(0),
syn_frame_count_(0),
syn_reply_frame_count_(0),
data_frame_count_(0),
fin_frame_count_(0) {
}
void OnError(FlipFramer* f) {
error_count_++;
}
void OnStreamFrameData(FlipStreamId stream_id,
const char* data,
size_t len) {
data_frame_count_++;
#ifdef TEST_LOGGING
std::cerr << "OnStreamFrameData(" << stream_id << ", \"";
if (len > 0) {
for (size_t i = 0 ; i < len; ++i) {
std::cerr << std::hex << (0xFF & (unsigned int)data[i]) << std::dec;
}
}
std::cerr << "\", " << len << ")\n";
#endif // TEST_LOGGING
}
void OnControl(const FlipControlFrame* frame) {
FlipHeaderBlock headers;
bool parsed_headers = false;
switch (frame->type()) {
case SYN_STREAM:
parsed_headers = framer_->ParseHeaderBlock(
reinterpret_cast<const FlipFrame*>(frame), &headers);
DCHECK(parsed_headers);
syn_frame_count_++;
break;
case SYN_REPLY:
parsed_headers = framer_->ParseHeaderBlock(
reinterpret_cast<const FlipFrame*>(frame), &headers);
DCHECK(parsed_headers);
syn_reply_frame_count_++;
break;
case FIN_STREAM:
fin_frame_count_++;
break;
default:
DCHECK(false); // Error!
}
}
void OnLameDuck() {
}
FlipFramer* framer_;
// Counters from the visitor callbacks.
int error_count_;
int syn_frame_count_;
int syn_reply_frame_count_;
int data_frame_count_;
int fin_frame_count_;
};
// Test our protocol constants
TEST_F(FlipFramerTest, ProtocolConstants) {
EXPECT_EQ(8u, sizeof(FlipFrame));
EXPECT_EQ(8u, sizeof(FlipDataFrame));
EXPECT_EQ(12u, sizeof(FlipControlFrame));
EXPECT_EQ(16u, sizeof(FlipSynStreamControlFrame));
EXPECT_EQ(16u, sizeof(FlipSynReplyControlFrame));
EXPECT_EQ(16u, sizeof(FlipFinStreamControlFrame));
EXPECT_EQ(1, SYN_STREAM);
EXPECT_EQ(2, SYN_REPLY);
EXPECT_EQ(3, FIN_STREAM);
}
// Test that we can encode and decode a FlipHeaderBlock.
TEST_F(FlipFramerTest, HeaderBlock) {
FlipHeaderBlock headers;
headers["alpha"] = "beta";
headers["gamma"] = "charlie";
FlipFramer framer;
// Encode the header block into a SynStream frame.
scoped_ptr<FlipSynStreamControlFrame> frame(
framer.CreateSynStream(1, 1, true, &headers));
EXPECT_TRUE(frame.get() != NULL);
FlipHeaderBlock new_headers;
FlipFrame* control_frame = reinterpret_cast<FlipFrame*>(frame.get());
framer.ParseHeaderBlock(control_frame, &new_headers);
EXPECT_EQ(headers.size(), new_headers.size());
EXPECT_EQ(headers["alpha"], new_headers["alpha"]);
EXPECT_EQ(headers["gamma"], new_headers["gamma"]);
}
TEST_F(FlipFramerTest, HeaderBlockBarfsOnOutOfOrderHeaders) {
FlipFrameBuilder frame;
frame.WriteUInt16(kControlFlagMask | 1);
frame.WriteUInt16(SYN_STREAM);
frame.WriteUInt32(0); // Placeholder for the length.
frame.WriteUInt32(3); // stream_id
frame.WriteUInt16(0); // Priority.
frame.WriteUInt16(2); // Number of headers.
FlipHeaderBlock::iterator it;
frame.WriteString("gamma");
frame.WriteString("gamma");
frame.WriteString("alpha");
frame.WriteString("alpha");
// write the length
frame.WriteUInt32ToOffset(4, frame.length() - sizeof(FlipFrame));
FlipHeaderBlock new_headers;
const FlipFrame* control_frame = frame.data();
FlipFramer framer;
framer.set_enable_compression(false);
EXPECT_FALSE(framer.ParseHeaderBlock(control_frame, &new_headers));
}
TEST_F(FlipFramerTest, BasicCompression) {
FlipHeaderBlock headers;
headers["server"] = "FlipServer 1.0";
headers["date"] = "Mon 12 Jan 2009 12:12:12 PST";
headers["status"] = "200";
headers["version"] = "HTTP/1.1";
headers["content-type"] = "text/html";
headers["content-length"] = "12";
FlipFramer framer;
scoped_ptr<FlipSynStreamControlFrame>
frame1(framer.CreateSynStream(1, 1, true, &headers));
scoped_ptr<FlipSynStreamControlFrame>
frame2(framer.CreateSynStream(1, 1, true, &headers));
// Expect the second frame to be more compact than the first.
EXPECT_LE(frame2->length(), frame1->length());
// Decompress the first frame
scoped_ptr<FlipFrame> frame3(
framer.DecompressFrame(reinterpret_cast<FlipFrame*>(frame1.get())));
// Decompress the second frame
scoped_ptr<FlipFrame> frame4(
framer.DecompressFrame(reinterpret_cast<FlipFrame*>(frame2.get())));
// Expect frames 3 & 4 to be the same.
EXPECT_EQ(0,
memcmp(frame3.get(), frame4.get(),
sizeof(FlipFrame) + frame3->length()));
}
TEST_F(FlipFramerTest, Basic) {
const unsigned char input[] = {
0x80, 0x01, 0x00, 0x01, // SYN Stream #1
0x00, 0x00, 0x00, 0x10,
0x00, 0x00, 0x00, 0x01,
0x00, 0x00, 0x00, 0x01,
0x00, 0x02, 'h', 'h',
0x00, 0x02, 'v', 'v',
0x00, 0x00, 0x00, 0x01, // DATA on Stream #1
0x00, 0x00, 0x00, 0x0c,
0xde, 0xad, 0xbe, 0xef,
0xde, 0xad, 0xbe, 0xef,
0xde, 0xad, 0xbe, 0xef,
0x80, 0x01, 0x00, 0x01, // SYN Stream #3
0x00, 0x00, 0x00, 0x08,
0x00, 0x00, 0x00, 0x03,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x03, // DATA on Stream #3
0x00, 0x00, 0x00, 0x08,
0xde, 0xad, 0xbe, 0xef,
0xde, 0xad, 0xbe, 0xef,
0x00, 0x00, 0x00, 0x01, // DATA on Stream #1
0x00, 0x00, 0x00, 0x04,
0xde, 0xad, 0xbe, 0xef,
0x80, 0x01, 0x00, 0x03, // FIN on Stream #1
0x00, 0x00, 0x00, 0x08,
0x00, 0x00, 0x00, 0x01,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x03, // DATA on Stream #3
0x00, 0x00, 0x00, 0x00,
0x80, 0x01, 0x00, 0x03, // FIN on Stream #3
0x00, 0x00, 0x00, 0x08,
0x00, 0x00, 0x00, 0x03,
0x00, 0x00, 0x00, 0x00,
};
FlipFramer framer;
framer.set_enable_compression(false);
TestFlipVisitor visitor(&framer);
framer.set_visitor(&visitor);
size_t input_remaining = sizeof(input);
const char* input_ptr = reinterpret_cast<const char*>(input);
while (input_remaining > 0 &&
framer.error_code() == FlipFramer::FLIP_NO_ERROR) {
size_t bytes_processed = framer.ProcessInput(input_ptr, sizeof(input));
input_remaining -= bytes_processed;
input_ptr += bytes_processed;
if (framer.state() == FlipFramer::FLIP_DONE)
framer.Reset();
}
EXPECT_EQ(0, visitor.error_count_);
EXPECT_EQ(2, visitor.syn_frame_count_);
EXPECT_EQ(0, visitor.syn_reply_frame_count_);
EXPECT_EQ(4, visitor.data_frame_count_);
EXPECT_EQ(2, visitor.fin_frame_count_);
}
} // namespace flip
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