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Cherry picked relevant chunked transfer encoding commits from master#833

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5 changes: 3 additions & 2 deletionsboost/network/protocol/http/client/async_impl.hpp
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Original file line numberDiff line numberDiff line change
Expand Up@@ -41,15 +41,16 @@ struct async_client
typedef std::function<bool(string_type&)> body_generator_function_type;

async_client(bool cache_resolved, bool follow_redirect,
bool always_verify_peer, int timeout,
bool always_verify_peer, int timeout, bool remove_chunk_markers,
std::shared_ptr<boost::asio::io_service> service,
optional<string_type> certificate_filename,
optional<string_type> verify_path,
optional<string_type> certificate_file,
optional<string_type> private_key_file,
optional<string_type> ciphers,
optional<string_type> sni_hostname, long ssl_options)
: connection_base(cache_resolved, follow_redirect, timeout),
: connection_base(cache_resolved, follow_redirect, timeout,
remove_chunk_markers),
service_ptr(service.get() ? service
: std::make_shared<boost::asio::io_service>()),
service_(*service_ptr),
Expand Down
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Original file line numberDiff line numberDiff line change
Expand Up@@ -44,6 +44,7 @@ struct async_connection_base {
static connection_ptr new_connection(
resolve_function resolve, resolver_type &resolver, bool follow_redirect,
bool always_verify_peer, bool https, int timeout,
bool remove_chunk_markers,
optional<string_type> certificate_filename = optional<string_type>(),
optional<string_type> const &verify_path = optional<string_type>(),
optional<string_type> certificate_file = optional<string_type>(),
Expand All@@ -59,7 +60,8 @@ struct async_connection_base {
certificate_filename, verify_path, certificate_file, private_key_file,
ciphers, sni_hostname, ssl_options);
auto temp = std::make_shared<async_connection>(
resolver, resolve, follow_redirect, timeout, std::move(delegate));
resolver, resolve, follow_redirect, timeout, remove_chunk_markers,
std::move(delegate));
BOOST_ASSERT(temp != nullptr);
return temp;
}
Expand Down
156 changes: 115 additions & 41 deletionsboost/network/protocol/http/client/connection/async_normal.hpp
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Original file line numberDiff line numberDiff line change
Expand Up@@ -30,13 +30,90 @@
#include <boost/network/traits/ostream_iterator.hpp>
#include <boost/network/version.hpp>
#include <boost/range/algorithm/transform.hpp>
#include <boost/range/iterator_range.hpp>
#include <boost/throw_exception.hpp>

namespace boost {
namespace network {
namespace http {
namespace impl {

template <class Tag>
struct chunk_encoding_parser {
chunk_encoding_parser() : state(state_t::header), chunk_size(0) {}

enum class state_t { header, header_end, data, data_end };

state_t state;
size_t chunk_size;
std::array<typename char_<Tag>::type, 1024> buffer;

void update_chunk_size(
boost::iterator_range<typename std::array<
typename char_<Tag>::type, 1024>::const_iterator> const &range) {
if (range.empty()) return;
std::stringstream ss;
ss << std::hex << range;
size_t size;
ss >> size;
// New digits are appended as LSBs
chunk_size = (chunk_size << (range.size() * 4)) | size;
}

boost::iterator_range<
typename std::array<typename char_<Tag>::type, 1024>::const_iterator>
operator()(
boost::iterator_range<typename std::array<
typename char_<Tag>::type, 1024>::const_iterator> const &range) {
auto iter = boost::begin(range);
auto begin = iter;
auto pos = boost::begin(buffer);

while (iter != boost::end(range)) switch (state) {
case state_t::header:
iter = std::find(iter, boost::end(range), '\r');
update_chunk_size(boost::make_iterator_range(begin, iter));
if (iter != boost::end(range)) {
state = state_t::header_end;
++iter;
}
break;

case state_t::header_end:
BOOST_ASSERT(*iter == '\n');
++iter;
state = state_t::data;
break;

case state_t::data:
if (chunk_size == 0) {
BOOST_ASSERT(*iter == '\r');
++iter;
state = state_t::data_end;
} else {
auto len = std::min(chunk_size,
(size_t)std::distance(iter, boost::end(range)));
begin = iter;
iter = std::next(iter, len);
pos = std::copy(begin, iter, pos);
chunk_size -= len;
}
break;

case state_t::data_end:
BOOST_ASSERT(*iter == '\n');
++iter;
begin = iter;
state = state_t::header;
break;

default:
BOOST_ASSERT(false && "Bug, report this to the developers!");
}
return boost::make_iterator_range(boost::begin(buffer), pos);
}
};

template <class Tag, unsigned version_major, unsigned version_minor>
struct async_connection_base;

Expand DownExpand Up@@ -73,8 +150,10 @@ struct http_async_connection

http_async_connection(resolver_type& resolver, resolve_function resolve,
bool follow_redirect, int timeout,
bool remove_chunk_markers,
connection_delegate_ptr delegate)
: timeout_(timeout),
remove_chunk_markers_(remove_chunk_markers),
timer_(resolver.get_io_service()),
is_timedout_(false),
follow_redirect_(follow_redirect),
Expand DownExpand Up@@ -354,8 +433,11 @@ struct http_async_connection

// The invocation of the callback is synchronous to allow us to
// wait before scheduling another read.
callback(make_iterator_range(begin, end), ec);

if (this->is_chunk_encoding && remove_chunk_markers_) {
callback(parse_chunk_encoding(make_iterator_range(begin, end)), ec);
} else {
callback(make_iterator_range(begin, end), ec);
}
auto self = this->shared_from_this();
delegate_->read_some(
boost::asio::mutable_buffers_1(this->part.data(),
Expand DownExpand Up@@ -394,16 +476,33 @@ struct http_async_connection
// We call the callback function synchronously passing the error
// condition (in this case, end of file) so that it can handle it
// appropriately.
callback(make_iterator_range(begin, end), ec);
if (this->is_chunk_encoding && remove_chunk_markers_) {
callback(parse_chunk_encoding(make_iterator_range(begin, end)), ec);
} else {
callback(make_iterator_range(begin, end), ec);
}
} else {
string_type body_string;
std::swap(body_string, this->partial_parsed);
auto it = this->part.begin();
std::advance(it, bytes_transferred);
body_string.append(this->part.begin(), it);
if (this->is_chunk_encoding) {
this->body_promise.set_value(parse_chunk_encoding(body_string));
if (this->is_chunk_encoding && remove_chunk_markers_) {
for (size_t i = 0; i < this->partial_parsed.size(); i += 1024) {
auto range = parse_chunk_encoding(boost::make_iterator_range(
static_cast<typename std::array<typename char_<Tag>::type, 1024>::const_iterator>(
this->partial_parsed.data()) + i,
static_cast<typename std::array<typename char_<Tag>::type, 1024>::const_iterator>(
this->partial_parsed.data()) +
std::min(i + 1024, this->partial_parsed.size())));
body_string.append(boost::begin(range), boost::end(range));
}
this->partial_parsed.clear();
auto range = parse_chunk_encoding(boost::make_iterator_range(
this->part.begin(),
this->part.begin() + bytes_transferred));
body_string.append(boost::begin(range), boost::end(range));
this->body_promise.set_value(body_string);
} else {
std::swap(body_string, this->partial_parsed);
body_string.append(this->part.begin(),
this->part.begin() + bytes_transferred);
this->body_promise.set_value(body_string);
}
}
Expand All@@ -425,7 +524,11 @@ struct http_async_connection
this->part.begin();
typename protocol_base::buffer_type::const_iterator end = begin;
std::advance(end, bytes_transferred);
callback(make_iterator_range(begin, end), ec);
if (this->is_chunk_encoding && remove_chunk_markers_) {
callback(parse_chunk_encoding(make_iterator_range(begin, end)), ec);
} else {
callback(make_iterator_range(begin, end), ec);
}
auto self = this->shared_from_this();
delegate_->read_some(
boost::asio::mutable_buffers_1(this->part.data(),
Expand DownExpand Up@@ -488,38 +591,8 @@ struct http_async_connection
}
}

string_type parse_chunk_encoding(string_type& body_string) {
string_type body;
string_type crlf = "\r\n";

typename string_type::iterator begin = body_string.begin();
for (typename string_type::iterator iter =
std::search(begin, body_string.end(), crlf.begin(), crlf.end());
iter != body_string.end();
iter =
std::search(begin, body_string.end(), crlf.begin(), crlf.end())) {
string_type line(begin, iter);
if (line.empty()) {
break;
}
std::stringstream stream(line);
int len;
stream >> std::hex >> len;
std::advance(iter, 2);
if (len == 0) {
break;
}
if (len <= body_string.end() - iter) {
body.insert(body.end(), iter, iter + len);
std::advance(iter, len + 2);
}
begin = iter;
}

return body;
}

int timeout_;
bool remove_chunk_markers_;
boost::asio::steady_timer timer_;
bool is_timedout_;
bool follow_redirect_;
Expand All@@ -529,6 +602,7 @@ struct http_async_connection
connection_delegate_ptr delegate_;
boost::asio::streambuf command_streambuf;
string_type method;
chunk_encoding_parser<Tag> parse_chunk_encoding;
};

} // namespace impl
Expand Down
3 changes: 2 additions & 1 deletionboost/network/protocol/http/client/facade.hpp
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Original file line numberDiff line numberDiff line change
Expand Up@@ -312,7 +312,8 @@ class basic_client_facade {
options.openssl_verify_path(), options.openssl_certificate_file(),
options.openssl_private_key_file(), options.openssl_ciphers(),
options.openssl_sni_hostname(), options.openssl_options(),
options.io_service(), options.timeout()));
options.io_service(), options.timeout(),
options.remove_chunk_markers()));
}
};

Expand Down
16 changes: 14 additions & 2 deletionsboost/network/protocol/http/client/options.hpp
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Original file line numberDiff line numberDiff line change
Expand Up@@ -34,7 +34,8 @@ class client_options {
openssl_options_(0),
io_service_(),
always_verify_peer_(true),
timeout_(0) {}
timeout_(0),
remove_chunk_markers_(true) {}

client_options(client_options const& other)
: cache_resolved_(other.cache_resolved_),
Expand All@@ -48,7 +49,8 @@ class client_options {
openssl_options_(other.openssl_options_),
io_service_(other.io_service_),
always_verify_peer_(other.always_verify_peer_),
timeout_(other.timeout_) {}
timeout_(other.timeout_),
remove_chunk_markers_(other.remove_chunk_markers_) {}

client_options& operator=(client_options other) {
other.swap(*this);
Expand All@@ -69,6 +71,7 @@ class client_options {
swap(io_service_, other.io_service_);
swap(always_verify_peer_, other.always_verify_peer_);
swap(timeout_, other.timeout_);
swap(remove_chunk_markers_, other.remove_chunk_markers_);
}

/// Specify whether the client should cache resolved endpoints.
Expand DownExpand Up@@ -154,6 +157,12 @@ class client_options {
return *this;
}

/// Set whether we process chunked-encoded streams.
client_options& remove_chunk_markers(bool v) {
remove_chunk_markers_ = v;
return *this;
}

bool cache_resolved() const { return cache_resolved_; }

bool follow_redirects() const { return follow_redirects_; }
Expand DownExpand Up@@ -190,6 +199,8 @@ class client_options {

int timeout() const { return timeout_; }

bool remove_chunk_markers() const { return remove_chunk_markers_; }

private:
bool cache_resolved_;
bool follow_redirects_;
Expand All@@ -203,6 +214,7 @@ class client_options {
std::shared_ptr<boost::asio::io_service> io_service_;
bool always_verify_peer_;
int timeout_;
bool remove_chunk_markers_;
};

template <class Tag>
Expand Down
10 changes: 6 additions & 4 deletionsboost/network/protocol/http/client/pimpl.hpp
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Original file line numberDiff line numberDiff line change
Expand Up@@ -74,10 +74,12 @@ struct basic_client_impl
optional<string_type> const& private_key_file,
optional<string_type> const& ciphers,
optional<string_type> const& sni_hostname, long ssl_options,
std::shared_ptr<boost::asio::io_service> service, int timeout)
: base_type(cache_resolved, follow_redirect, always_verify_peer, timeout,
service, certificate_filename, verify_path, certificate_file,
private_key_file, ciphers, sni_hostname, ssl_options) {}
std::shared_ptr<boost::asio::io_service> service, int timeout,
bool remove_chunk_markers)
: base_type(cache_resolved, follow_redirect, always_verify_peer, timeout,
remove_chunk_markers, service, certificate_filename, verify_path,
certificate_file, private_key_file, ciphers, sni_hostname,
ssl_options) {}

~basic_client_impl() = default;
};
Expand Down
18 changes: 10 additions & 8 deletionsboost/network/protocol/http/policies/async_connection.hpp
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Original file line numberDiff line numberDiff line change
Expand Up@@ -40,7 +40,7 @@ struct async_connection_policy : resolver_policy<Tag>::type {
struct connection_impl {
connection_impl(
bool follow_redirect, bool always_verify_peer, resolve_function resolve,
resolver_type& resolver, bool https, int timeout,
resolver_type& resolver, bool https, int timeout, bool remove_chunk_markers,
optional<string_type> /*unused*/ const& certificate_filename,
optional<string_type> const& verify_path,
optional<string_type> const& certificate_file,
Expand All@@ -49,9 +49,9 @@ struct async_connection_policy : resolver_policy<Tag>::type {
optional<string_type> const& sni_hostname, long ssl_options) {
pimpl = impl::async_connection_base<Tag, version_major, version_minor>::
new_connection(resolve, resolver, follow_redirect, always_verify_peer,
https, timeout,certificate_filename, verify_path,
certificate_file, private_key_file, ciphers,
sni_hostname, ssl_options);
https, timeout,remove_chunk_markers,
certificate_filename, verify_path, certificate_file,
private_key_file, ciphers,sni_hostname, ssl_options);
}

basic_response<Tag> send_request(string_type /*unused*/ const& method,
Expand DownExpand Up@@ -88,20 +88,22 @@ struct async_connection_policy : resolver_policy<Tag>::type {
this->resolve(resolver, host, port, once_resolved);
},
resolver, boost::iequals(protocol_, string_type("https")), timeout_,
certificate_filename, verify_path, certificate_file, private_key_file,
ciphers, sni_hostname, ssl_options);
remove_chunk_markers_, certificate_filename, verify_path,
certificate_file, private_key_file,ciphers, sni_hostname, ssl_options);
}

void cleanup() {}

async_connection_policy(bool cache_resolved, bool follow_redirect,
int timeout)
int timeout, bool remove_chunk_markers)
: resolver_base(cache_resolved),
follow_redirect_(follow_redirect),
timeout_(timeout) {}
timeout_(timeout),
remove_chunk_markers_(remove_chunk_markers) {}

bool follow_redirect_;
int timeout_;
bool remove_chunk_markers_;
};

} // namespace http
Expand Down
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