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Added set_content_provider without content length

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yhirose 2020-08-15 05:53:49 -04:00
parent 951e46929e
commit e5dd410256
2 changed files with 124 additions and 30 deletions
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75
httplib.h
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@ -299,7 +299,7 @@ private:
using ContentProvider =
std::function<bool(size_t offset, size_t length, DataSink &sink)>;
using ChunkedContentProvider =
using ContentProviderWithoutLength =
std::function<bool(size_t offset, DataSink &sink)>;
using ContentReceiver =
@ -404,8 +404,12 @@ struct Response {
size_t length, const char *content_type, ContentProvider provider,
std::function<void()> resource_releaser = [] {});
void set_content_provider(
const char *content_type, ContentProviderWithoutLength provider,
std::function<void()> resource_releaser = [] {});
void set_chunked_content_provider(
const char *content_type, ChunkedContentProvider provider,
const char *content_type, ContentProviderWithoutLength provider,
std::function<void()> resource_releaser = [] {});
Response() = default;
@ -423,6 +427,7 @@ struct Response {
size_t content_length_ = 0;
ContentProvider content_provider_;
std::function<void()> content_provider_resource_releaser_;
bool is_chunked_content_provider = false;
};
class Stream {
@ -2664,19 +2669,19 @@ inline ssize_t write_content(Stream &strm, ContentProvider content_provider,
size_t offset, size_t length, T is_shutting_down) {
size_t begin_offset = offset;
size_t end_offset = offset + length;
auto ok = true;
DataSink data_sink;
data_sink.write = [&](const char *d, size_t l) {
if (ok) {
offset += l;
if (!write_data(strm, d, l)) { ok = false; }
}
};
data_sink.is_writable = [&](void) { return ok && strm.is_writable(); };
while (ok && offset < end_offset && !is_shutting_down()) {
while (offset < end_offset && !is_shutting_down()) {
if (!content_provider(offset, end_offset - offset, data_sink)) {
return -1;
}
@ -2686,6 +2691,34 @@ inline ssize_t write_content(Stream &strm, ContentProvider content_provider,
return static_cast<ssize_t>(offset - begin_offset);
}
template <typename T>
inline ssize_t write_content_without_length(Stream &strm,
ContentProvider content_provider,
T is_shutting_down) {
size_t offset = 0;
auto data_available = true;
auto ok = true;
DataSink data_sink;
data_sink.write = [&](const char *d, size_t l) {
if (ok) {
offset += l;
if (!write_data(strm, d, l)) { ok = false; }
}
};
data_sink.done = [&](void) { data_available = false; };
data_sink.is_writable = [&](void) { return ok && strm.is_writable(); };
while (data_available && !is_shutting_down()) {
if (!content_provider(offset, 0, data_sink)) { return -1; }
if (!ok) { return -1; }
}
return static_cast<ssize_t>(offset);
}
template <typename T, typename U>
inline ssize_t write_content_chunked(Stream &strm,
ContentProvider content_provider,
@ -2693,7 +2726,6 @@ inline ssize_t write_content_chunked(Stream &strm,
size_t offset = 0;
auto data_available = true;
ssize_t total_written_length = 0;
auto ok = true;
DataSink data_sink;
@ -3544,10 +3576,11 @@ Response::set_content_provider(size_t in_length, const char *content_type,
return provider(offset, length, sink);
};
content_provider_resource_releaser_ = resource_releaser;
is_chunked_content_provider = false;
}
inline void Response::set_chunked_content_provider(
const char *content_type, ChunkedContentProvider provider,
inline void Response::set_content_provider(
const char *content_type, ContentProviderWithoutLength provider,
std::function<void()> resource_releaser) {
set_header("Content-Type", content_type);
content_length_ = 0;
@ -3555,6 +3588,19 @@ inline void Response::set_chunked_content_provider(
return provider(offset, sink);
};
content_provider_resource_releaser_ = resource_releaser;
is_chunked_content_provider = false;
}
inline void Response::set_chunked_content_provider(
const char *content_type, ContentProviderWithoutLength provider,
std::function<void()> resource_releaser) {
set_header("Content-Type", content_type);
content_length_ = 0;
content_provider_ = [provider](size_t offset, size_t, DataSink &sink) {
return provider(offset, sink);
};
content_provider_resource_releaser_ = resource_releaser;
is_chunked_content_provider = true;
}
// Rstream implementation
@ -3893,7 +3939,7 @@ inline bool Server::write_response(Stream &strm, bool close_connection,
}
if (!res.has_header("Content-Type") &&
(!res.body.empty() || res.content_length_ > 0)) {
(!res.body.empty() || res.content_length_ > 0 || res.content_provider_)) {
res.set_header("Content-Type", "text/plain");
}
@ -3939,12 +3985,14 @@ inline bool Server::write_response(Stream &strm, bool close_connection,
res.set_header("Content-Length", std::to_string(length));
} else {
if (res.content_provider_) {
if (res.is_chunked_content_provider) {
res.set_header("Transfer-Encoding", "chunked");
if (type == detail::EncodingType::Gzip) {
res.set_header("Content-Encoding", "gzip");
} else if (type == detail::EncodingType::Brotli) {
res.set_header("Content-Encoding", "br");
}
}
} else {
res.set_header("Content-Length", "0");
}
@ -4033,7 +4081,7 @@ Server::write_content_with_provider(Stream &strm, const Request &req,
return this->svr_sock_ == INVALID_SOCKET;
};
if (res.content_length_) {
if (res.content_length_ > 0) {
if (req.ranges.empty()) {
if (detail::write_content(strm, res.content_provider_, 0,
res.content_length_, is_shutting_down) < 0) {
@ -4055,6 +4103,7 @@ Server::write_content_with_provider(Stream &strm, const Request &req,
}
}
} else {
if (res.is_chunked_content_provider) {
auto type = detail::encoding_type(req, res);
std::shared_ptr<detail::compressor> compressor;
@ -4075,6 +4124,12 @@ Server::write_content_with_provider(Stream &strm, const Request &req,
is_shutting_down, *compressor) < 0) {
return false;
}
} else {
if (detail::write_content_without_length(strm, res.content_provider_,
is_shutting_down) < 0) {
return false;
}
}
}
return true;
}

43
test/test.cc
View file

@ -1895,8 +1895,7 @@ TEST_F(ServerTest, ClientStop) {
auto res = cli_.Get("/streamed-cancel",
[&](const char *, uint64_t) { return true; });
ASSERT_TRUE(!res);
EXPECT_TRUE(res.error() == Error::Canceled ||
res.error() == Error::Read);
EXPECT_TRUE(res.error() == Error::Canceled || res.error() == Error::Read);
}));
}
@ -2730,6 +2729,46 @@ TEST(ServerStopTest, StopServerWithChunkedTransmission) {
ASSERT_FALSE(svr.is_running());
}
TEST(StreamingTest, NoContentLengthStreaming) {
Server svr;
svr.Get("/stream", [](const Request & /*req*/, Response &res) {
res.set_content_provider(
"text/plain", [](size_t offset, DataSink &sink) {
if (offset < 6) {
sink.os << (offset < 3 ? "a" : "b");
} else {
sink.done();
}
return true;
});
});
auto listen_thread = std::thread([&svr]() { svr.listen("localhost", PORT); });
while (!svr.is_running()) {
std::this_thread::sleep_for(std::chrono::milliseconds(1));
}
Client client(HOST, PORT);
auto get_thread = std::thread([&client]() {
auto res = client.Get("/stream", [](const char *data, size_t len) -> bool {
EXPECT_EQ("aaabbb", std::string(data, len));
return true;
});
});
// Give GET time to get a few messages.
std::this_thread::sleep_for(std::chrono::milliseconds(500));
svr.stop();
listen_thread.join();
get_thread.join();
ASSERT_FALSE(svr.is_running());
}
TEST(MountTest, Unmount) {
Server svr;