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Improved Stream interface

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This commit is contained in:
yhirose 2020-01-03 16:41:24 -05:00
parent e5ca863de5
commit 2e360f9dd6
13 changed files with 202 additions and 54 deletions
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1
.gitignore vendored
View file

@ -6,6 +6,7 @@ example/hello
example/simplesvr
example/benchmark
example/redirect
example/sse
example/upload
example/*.pem
test/test

7
example/Makefile
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@ -5,7 +5,7 @@ OPENSSL_DIR = /usr/local/opt/openssl
OPENSSL_SUPPORT = -DCPPHTTPLIB_OPENSSL_SUPPORT -I$(OPENSSL_DIR)/include -L$(OPENSSL_DIR)/lib -lssl -lcrypto
ZLIB_SUPPORT = -DCPPHTTPLIB_ZLIB_SUPPORT -lz
all: server client hello simplesvr upload redirect benchmark
all: server client hello simplesvr upload redirect sse benchmark
server : server.cc ../httplib.h Makefile
$(CXX) -o server $(CXXFLAGS) server.cc $(OPENSSL_SUPPORT) $(ZLIB_SUPPORT)
@ -25,6 +25,9 @@ upload : upload.cc ../httplib.h Makefile
redirect : redirect.cc ../httplib.h Makefile
$(CXX) -o redirect $(CXXFLAGS) redirect.cc $(OPENSSL_SUPPORT) $(ZLIB_SUPPORT)
sse : sse.cc ../httplib.h Makefile
$(CXX) -o sse $(CXXFLAGS) sse.cc $(OPENSSL_SUPPORT) $(ZLIB_SUPPORT)
benchmark : benchmark.cc ../httplib.h Makefile
$(CXX) -o benchmark $(CXXFLAGS) benchmark.cc $(OPENSSL_SUPPORT) $(ZLIB_SUPPORT)
@ -33,4 +36,4 @@ pem:
openssl req -new -key key.pem | openssl x509 -days 3650 -req -signkey key.pem > cert.pem
clean:
rm server client hello simplesvr upload redirect benchmark *.pem
rm server client hello simplesvr upload redirect sse benchmark *.pem

106
example/sse.cc Normal file
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@ -0,0 +1,106 @@
//
// sse.cc
//
// Copyright (c) 2020 Yuji Hirose. All rights reserved.
// MIT License
//
#include <atomic>
#include <chrono>
#include <condition_variable>
#include <httplib.h>
#include <iostream>
#include <mutex>
#include <thread>
using namespace httplib;
using namespace std;
class EventDispatcher {
public:
EventDispatcher() {
id_ = 0;
cid_ = -1;
}
void add_sink(DataSink *sink) {
unique_lock<mutex> lk(m_);
int id = id_;
cv_.wait(lk, [&] { return cid_ == id; });
if (sink->is_writable()) { sink->write(message_.data(), message_.size()); }
}
void send_event(const string &message) {
lock_guard<mutex> lk(m_);
cid_ = id_++;
message_ = message;
cv_.notify_all();
}
private:
mutex m_;
condition_variable cv_;
atomic_int id_;
atomic_int cid_;
string message_;
};
const auto html = R"(
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>SSE demo</title>
</head>
<body>
<script>
const ev1 = new EventSource("event1");
ev1.onmessage = function(e) {
console.log('ev1', e.data);
}
const ev2 = new EventSource("event2");
ev2.onmessage = function(e) {
console.log('ev2', e.data);
}
</script>
</body>
</html>
)";
int main(void) {
EventDispatcher ed;
Server svr;
svr.Get("/", [&](const Request & /*req*/, Response &res) {
res.set_content(html, "text/html");
});
svr.Get("/event1", [&](const Request & /*req*/, Response &res) {
cout << "connected to event1..." << endl;
res.set_header("Content-Type", "text/event-stream");
res.set_chunked_content_provider(
[&](uint64_t /*offset*/, DataSink &sink) { ed.add_sink(&sink); });
});
svr.Get("/event2", [&](const Request & /*req*/, Response &res) {
cout << "connected to event2..." << endl;
res.set_header("Content-Type", "text/event-stream");
res.set_chunked_content_provider(
[&](uint64_t /*offset*/, DataSink &sink) { ed.add_sink(&sink); });
});
thread t([&] {
int id = 0;
while (true) {
this_thread::sleep_for(chrono::seconds(1));
cout << "send event: " << id << std::endl;
std::stringstream ss;
ss << "data: " << id << "\n\n";
ed.send_event(ss.str());
id++;
}
});
svr.listen("localhost", 1234);
}

133
httplib.h
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@ -224,7 +224,7 @@ public:
std::function<void(const char *data, size_t data_len)> write;
std::function<void()> done;
// TODO: std::function<bool()> is_alive;
std::function<bool()> is_writable;
};
using ContentProvider =
@ -349,14 +349,18 @@ struct Response {
class Stream {
public:
virtual ~Stream() = default;
virtual bool is_readable() const = 0;
virtual bool is_writable() const = 0;
virtual int read(char *ptr, size_t size) = 0;
virtual int write(const char *ptr, size_t size1) = 0;
virtual int write(const char *ptr) = 0;
virtual int write(const std::string &s) = 0;
virtual int write(const char *ptr, size_t size) = 0;
virtual std::string get_remote_addr() const = 0;
template <typename... Args>
int write_format(const char *fmt, const Args &... args);
int write(const char *ptr);
int write(const std::string &s);
};
class TaskQueue {
@ -496,7 +500,7 @@ protected:
private:
using Handlers = std::vector<std::pair<std::regex, Handler>>;
using HandersForContentReader =
using HandlersForContentReader =
std::vector<std::pair<std::regex, HandlerWithContentReader>>;
socket_t create_server_socket(const char *host, int port,
@ -509,7 +513,7 @@ private:
bool dispatch_request(Request &req, Response &res, Handlers &handlers);
bool dispatch_request_for_content_reader(Request &req, Response &res,
ContentReader content_reader,
HandersForContentReader &handlers);
HandlersForContentReader &handlers);
bool parse_request_line(const char *s, Request &req);
bool write_response(Stream &strm, bool last_connection, const Request &req,
@ -537,11 +541,11 @@ private:
Handler file_request_handler_;
Handlers get_handlers_;
Handlers post_handlers_;
HandersForContentReader post_handlers_for_content_reader_;
HandlersForContentReader post_handlers_for_content_reader_;
Handlers put_handlers_;
HandersForContentReader put_handlers_for_content_reader_;
HandlersForContentReader put_handlers_for_content_reader_;
Handlers patch_handlers_;
HandersForContentReader patch_handlers_for_content_reader_;
HandlersForContentReader patch_handlers_for_content_reader_;
Handlers delete_handlers_;
Handlers options_handlers_;
Handler error_handler_;
@ -1186,6 +1190,28 @@ inline int select_read(socket_t sock, time_t sec, time_t usec) {
#endif
}
inline int select_write(socket_t sock, time_t sec, time_t usec) {
#ifdef CPPHTTPLIB_USE_POLL
struct pollfd pfd_read;
pfd_read.fd = sock;
pfd_read.events = POLLOUT;
auto timeout = static_cast<int>(sec * 1000 + usec / 1000);
return poll(&pfd_read, 1, timeout);
#else
fd_set fds;
FD_ZERO(&fds);
FD_SET(sock, &fds);
timeval tv;
tv.tv_sec = static_cast<long>(sec);
tv.tv_usec = static_cast<long>(usec);
return select(static_cast<int>(sock + 1), nullptr, &fds, nullptr, &tv);
#endif
}
inline bool wait_until_socket_is_ready(socket_t sock, time_t sec, time_t usec) {
#ifdef CPPHTTPLIB_USE_POLL
struct pollfd pfd_read;
@ -1233,10 +1259,10 @@ public:
time_t read_timeout_usec);
~SocketStream() override;
bool is_readable() const override;
bool is_writable() const override;
int read(char *ptr, size_t size) override;
int write(const char *ptr, size_t size) override;
int write(const char *ptr) override;
int write(const std::string &s) override;
std::string get_remote_addr() const override;
private:
@ -1252,11 +1278,11 @@ public:
time_t read_timeout_usec);
virtual ~SSLSocketStream();
virtual int read(char *ptr, size_t size);
virtual int write(const char *ptr, size_t size);
virtual int write(const char *ptr);
virtual int write(const std::string &s);
virtual std::string get_remote_addr() const;
bool is_readable() const override;
bool is_writable() const override;
int read(char *ptr, size_t size) override;
int write(const char *ptr, size_t size) override;
std::string get_remote_addr() const override;
private:
socket_t sock_;
@ -1271,10 +1297,10 @@ public:
BufferStream() = default;
~BufferStream() override = default;
bool is_readable() const override;
bool is_writable() const override;
int read(char *ptr, size_t size) override;
int write(const char *ptr, size_t size) override;
int write(const char *ptr) override;
int write(const std::string &s) override;
std::string get_remote_addr() const override;
const std::string &get_buffer() const;
@ -1914,6 +1940,7 @@ inline ssize_t write_content(Stream &strm, ContentProvider content_provider,
written_length = strm.write(d, l);
};
data_sink.done = [&](void) { written_length = -1; };
data_sink.is_writable = [&](void) { return strm.is_writable(); };
content_provider(offset, end_offset - offset, data_sink);
if (written_length < 0) { return written_length; }
@ -1944,6 +1971,7 @@ inline ssize_t write_content_chunked(Stream &strm,
data_available = false;
written_length = strm.write("0\r\n\r\n");
};
data_sink.is_writable = [&](void) { return strm.is_writable(); };
content_provider(offset, 0, data_sink);
@ -2701,6 +2729,12 @@ inline void Response::set_chunked_content_provider(
}
// Rstream implementation
inline int Stream::write(const char *ptr) { return write(ptr, strlen(ptr)); }
inline int Stream::write(const std::string &s) {
return write(s.data(), s.size());
}
template <typename... Args>
inline int Stream::write_format(const char *fmt, const Args &... args) {
std::array<char, 2048> buf;
@ -2740,23 +2774,22 @@ inline SocketStream::SocketStream(socket_t sock, time_t read_timeout_sec,
inline SocketStream::~SocketStream() {}
inline bool SocketStream::is_readable() const {
return detail::select_read(sock_, read_timeout_sec_, read_timeout_usec_) > 0;
}
inline bool SocketStream::is_writable() const {
return detail::select_write(sock_, 0, 0) > 0;
}
inline int SocketStream::read(char *ptr, size_t size) {
if (detail::select_read(sock_, read_timeout_sec_, read_timeout_usec_) > 0) {
return recv(sock_, ptr, static_cast<int>(size), 0);
}
if (is_readable()) { return recv(sock_, ptr, static_cast<int>(size), 0); }
return -1;
}
inline int SocketStream::write(const char *ptr, size_t size) {
return send(sock_, ptr, static_cast<int>(size), 0);
}
inline int SocketStream::write(const char *ptr) {
return write(ptr, strlen(ptr));
}
inline int SocketStream::write(const std::string &s) {
return write(s.data(), s.size());
if (is_writable()) { return send(sock_, ptr, static_cast<int>(size), 0); }
return -1;
}
inline std::string SocketStream::get_remote_addr() const {
@ -2764,6 +2797,10 @@ inline std::string SocketStream::get_remote_addr() const {
}
// Buffer stream implementation
inline bool BufferStream::is_readable() const { return true; }
inline bool BufferStream::is_writable() const { return true; }
inline int BufferStream::read(char *ptr, size_t size) {
#if defined(_MSC_VER) && _MSC_VER < 1900
int len_read = static_cast<int>(buffer._Copy_s(ptr, size, size, position));
@ -2779,14 +2816,6 @@ inline int BufferStream::write(const char *ptr, size_t size) {
return static_cast<int>(size);
}
inline int BufferStream::write(const char *ptr) {
return write(ptr, strlen(ptr));
}
inline int BufferStream::write(const std::string &s) {
return write(s.data(), s.size());
}
inline std::string BufferStream::get_remote_addr() const { return ""; }
inline const std::string &BufferStream::get_buffer() const { return buffer; }
@ -3372,10 +3401,9 @@ inline bool Server::dispatch_request(Request &req, Response &res,
return false;
}
inline bool
Server::dispatch_request_for_content_reader(Request &req, Response &res,
ContentReader content_reader,
HandersForContentReader &handlers) {
inline bool Server::dispatch_request_for_content_reader(
Request &req, Response &res, ContentReader content_reader,
HandlersForContentReader &handlers) {
for (const auto &x : handlers) {
const auto &pattern = x.first;
const auto &handler = x.second;
@ -3777,6 +3805,7 @@ inline bool Client::write_request(Stream &strm, const Request &req,
auto written_length = strm.write(d, l);
offset += written_length;
};
data_sink.is_writable = [&](void) { return strm.is_writable(); };
while (offset < end_offset) {
req.content_provider(offset, end_offset - offset, data_sink);
@ -3810,6 +3839,7 @@ inline std::shared_ptr<Response> Client::send_with_content_provider(
req.body.append(data, data_len);
offset += data_len;
};
data_sink.is_writable = [&](void) { return true; };
while (offset < content_length) {
content_provider(offset, content_length - offset, data_sink);
@ -4380,6 +4410,14 @@ inline SSLSocketStream::SSLSocketStream(socket_t sock, SSL *ssl,
inline SSLSocketStream::~SSLSocketStream() {}
inline bool SSLSocketStream::is_readable() const {
return detail::select_read(sock_, read_timeout_sec_, read_timeout_usec_) > 0;
}
inline bool SSLSocketStream::is_writable() const {
return detail::select_write(sock_, 0, 0) > 0;
}
inline int SSLSocketStream::read(char *ptr, size_t size) {
if (SSL_pending(ssl_) > 0 ||
select_read(sock_, read_timeout_sec_, read_timeout_usec_) > 0) {
@ -4389,15 +4427,8 @@ inline int SSLSocketStream::read(char *ptr, size_t size) {
}
inline int SSLSocketStream::write(const char *ptr, size_t size) {
return SSL_write(ssl_, ptr, static_cast<int>(size));
}
inline int SSLSocketStream::write(const char *ptr) {
return write(ptr, strlen(ptr));
}
inline int SSLSocketStream::write(const std::string &s) {
return write(s.data(), s.size());
if (is_writable()) { return SSL_write(ssl_, ptr, static_cast<int>(size)); }
return -1;
}
inline std::string SSLSocketStream::get_remote_addr() const {

0
test/test_proxy_docker/Dockerfile → test/proxy/Dockerfile
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0
test/test_proxy_docker/basic_passwd → test/proxy/basic_passwd
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0
test/test_proxy_docker/basic_squid.conf → test/proxy/basic_squid.conf
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0
test/test_proxy_docker/digest_passwd → test/proxy/digest_passwd
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0
test/test_proxy_docker/digest_squid.conf → test/proxy/digest_squid.conf
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0
test/test_proxy_docker/docker-compose.yml → test/proxy/docker-compose.yml
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0
test/test_proxy_docker/down.sh → test/proxy/down.sh
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0
test/test_proxy_docker/up.sh → test/proxy/up.sh
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9
test/test.cc
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@ -200,7 +200,8 @@ TEST(ParseHeaderValueTest, Range) {
}
TEST(BufferStreamTest, read) {
detail::BufferStream strm;
detail::BufferStream strm1;
Stream& strm = strm1;
EXPECT_EQ(5, strm.write("hello"));
@ -724,6 +725,7 @@ protected:
[&](const Request & /*req*/, Response &res) {
res.set_chunked_content_provider(
[](uint64_t /*offset*/, DataSink &sink) {
ASSERT_TRUE(sink.is_writable());
sink.write("123", 3);
sink.write("456", 3);
sink.write("789", 3);
@ -735,6 +737,7 @@ protected:
auto i = new int(0);
res.set_chunked_content_provider(
[i](uint64_t /*offset*/, DataSink &sink) {
ASSERT_TRUE(sink.is_writable());
switch (*i) {
case 0: sink.write("123", 3); break;
case 1: sink.write("456", 3); break;
@ -758,6 +761,7 @@ protected:
res.set_content_provider(
data->size(),
[data](uint64_t offset, uint64_t length, DataSink &sink) {
ASSERT_TRUE(sink.is_writable());
size_t DATA_CHUNK_SIZE = 4;
const auto &d = *data;
auto out_len =
@ -771,6 +775,7 @@ protected:
res.set_content_provider(size_t(-1), [](uint64_t /*offset*/,
uint64_t /*length*/,
DataSink &sink) {
ASSERT_TRUE(sink.is_writable());
std::string data = "data_chunk";
sink.write(data.data(), data.size());
});
@ -1636,6 +1641,7 @@ TEST_F(ServerTest, PutWithContentProvider) {
auto res = cli_.Put(
"/put", 3,
[](size_t /*offset*/, size_t /*length*/, DataSink &sink) {
ASSERT_TRUE(sink.is_writable());
sink.write("PUT", 3);
},
"text/plain");
@ -1651,6 +1657,7 @@ TEST_F(ServerTest, PutWithContentProviderWithGzip) {
auto res = cli_.Put(
"/put", 3,
[](size_t /*offset*/, size_t /*length*/, DataSink &sink) {
ASSERT_TRUE(sink.is_writable());
sink.write("PUT", 3);
},
"text/plain");