242 lines
8.1 KiB
C++
242 lines
8.1 KiB
C++
/*
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* nghttp2 - HTTP/2 C Library
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*
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* Copyright (c) 2015 Tatsuhiro Tsujikawa
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef ASIO_HTTP2_CLIENT_H
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#define ASIO_HTTP2_CLIENT_H
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#include <nghttp2/asio_http2.h>
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namespace nghttp2 {
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namespace asio_http2 {
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namespace client {
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class response_impl;
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class response {
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public:
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// Application must not call this directly.
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response();
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~response();
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// Sets callback which is invoked when chunk of response body is
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// received.
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void on_data(data_cb cb) const;
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// Returns status code.
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int status_code() const;
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// Returns content-length. -1 if it is unknown.
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int64_t content_length() const;
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// Returns the response header fields. The pusedo header fields,
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// which start with colon (:), are exluced from this list.
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const header_map &header() const;
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// Application must not call this directly.
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response_impl &impl() const;
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private:
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std::unique_ptr<response_impl> impl_;
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};
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class request;
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using response_cb = std::function<void(const response &)>;
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using request_cb = std::function<void(const request &)>;
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using connect_cb =
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std::function<void(boost::asio::ip::tcp::resolver::iterator)>;
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class request_impl;
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class request {
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public:
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// Application must not call this directly.
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request();
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~request();
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// Sets callback which is invoked when response header is received.
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void on_response(response_cb cb) const;
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// Sets callback which is invoked when push request header is
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// received.
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void on_push(request_cb cb) const;
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// Sets callback which is invoked when this request and response are
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// finished. After the invocation of this callback, the application
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// must not access request and response object.
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void on_close(close_cb cb) const;
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// Write trailer part. This must be called after setting both
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// NGHTTP2_DATA_FLAG_EOF and NGHTTP2_DATA_FLAG_NO_END_STREAM set in
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// *data_flag parameter in generator_cb passed to session::submit()
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// function.
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void write_trailer(header_map h) const;
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// Cancels this request and response with given error code.
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void cancel(uint32_t error_code = NGHTTP2_INTERNAL_ERROR) const;
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// Resumes deferred uploading.
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void resume() const;
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// Returns method (e.g., GET).
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const std::string &method() const;
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// Returns request URI, split into components.
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const uri_ref &uri() const;
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// Returns request header fields. The pusedo header fields, which
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// start with colon (:), are exluced from this list.
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const header_map &header() const;
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// Application must not call this directly.
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request_impl &impl() const;
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private:
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std::unique_ptr<request_impl> impl_;
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};
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// Wrapper around an nghttp2_priority_spec.
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class priority_spec {
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public:
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// The default ctor is used only by sentinel values.
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priority_spec() = default;
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// Create a priority spec with the given priority settings.
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explicit priority_spec(const int32_t stream_id, const int32_t weight,
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const bool exclusive = false);
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// Return a pointer to a valid nghttp2 priority spec, or null.
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const nghttp2_priority_spec *get() const;
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// Indicates whether or not this spec is valid (i.e. was constructed with
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// values).
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const bool valid() const;
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private:
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nghttp2_priority_spec spec_;
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bool valid_ = false;
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};
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class session_impl;
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class session {
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public:
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// Starts HTTP/2 session by connecting to |host| and |service|
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// (e.g., "80") using clear text TCP connection with connect timeout
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// 60 seconds.
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session(boost::asio::io_service &io_service, const std::string &host,
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const std::string &service);
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// Starts HTTP/2 session by connecting to |host| and |service|
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// (e.g., "80") using clear text TCP connection with given connect
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// timeout.
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session(boost::asio::io_service &io_service, const std::string &host,
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const std::string &service,
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const boost::posix_time::time_duration &connect_timeout);
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// Starts HTTP/2 session by connecting to |host| and |service|
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// (e.g., "443") using encrypted SSL/TLS connection with connect
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// timeout 60 seconds.
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session(boost::asio::io_service &io_service,
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boost::asio::ssl::context &tls_context, const std::string &host,
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const std::string &service);
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// Starts HTTP/2 session by connecting to |host| and |service|
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// (e.g., "443") using encrypted SSL/TLS connection with given
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// connect timeout.
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session(boost::asio::io_service &io_service,
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boost::asio::ssl::context &tls_context, const std::string &host,
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const std::string &service,
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const boost::posix_time::time_duration &connect_timeout);
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~session();
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session(session &&other) noexcept;
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session &operator=(session &&other) noexcept;
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// Sets callback which is invoked after connection is established.
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void on_connect(connect_cb cb) const;
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// Sets callback which is invoked there is connection level error
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// and session is terminated.
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void on_error(error_cb cb) const;
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// Sets read timeout, which defaults to 60 seconds.
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void read_timeout(const boost::posix_time::time_duration &t);
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// Shutdowns connection.
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void shutdown() const;
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// Returns underlying io_service object.
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boost::asio::io_service &io_service() const;
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// Submits request to server using |method| (e.g., "GET"), |uri|
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// (e.g., "http://localhost/") and optionally additional header
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// fields. This function returns pointer to request object if it
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// succeeds, or nullptr and |ec| contains error message.
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const request *submit(boost::system::error_code &ec,
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const std::string &method, const std::string &uri,
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header_map h = header_map{},
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priority_spec prio = priority_spec()) const;
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// Submits request to server using |method| (e.g., "GET"), |uri|
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// (e.g., "http://localhost/") and optionally additional header
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// fields. The |data| is request body. This function returns
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// pointer to request object if it succeeds, or nullptr and |ec|
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// contains error message.
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const request *submit(boost::system::error_code &ec,
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const std::string &method, const std::string &uri,
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std::string data, header_map h = header_map{},
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priority_spec prio = priority_spec()) const;
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// Submits request to server using |method| (e.g., "GET"), |uri|
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// (e.g., "http://localhost/") and optionally additional header
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// fields. The |cb| is used to generate request body. This
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// function returns pointer to request object if it succeeds, or
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// nullptr and |ec| contains error message.
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const request *submit(boost::system::error_code &ec,
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const std::string &method, const std::string &uri,
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generator_cb cb, header_map h = header_map{},
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priority_spec prio = priority_spec()) const;
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private:
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std::shared_ptr<session_impl> impl_;
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};
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// configure |tls_ctx| for client use. Currently, we just set NPN
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// callback for HTTP/2.
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boost::system::error_code
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configure_tls_context(boost::system::error_code &ec,
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boost::asio::ssl::context &tls_ctx);
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} // namespace client
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} // namespace asio_http2
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} // namespace nghttp2
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#endif // ASIO_HTTP2_CLIENT_H
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