Add support for retrieving HTTP version of a request in HTTP listener (#565)

* Grab HTTP protocol version from the underlying request message and expose in http_request

* Use error_code overload to resolve #545

* Rename get_http_version and get_remote_address without 'get_' prefix for consistency with rest of class public interface

* Add test case for http_version

* Fix GCC "error: changes meaning of 'http_version'..." that should have been in commit:1ba5ebfd

* Use struct for http_version instead of pair.

* Restore get_remote_address to avoid breaking source compat

Author: garethsb

Release/include/cpprest/http_msg.h

@@ -43,6 +43,34 @@ namespace client
     class http_client;
 }
 
+/// <summary>
+/// Represents the HTTP protocol version of a message, as {major, minor}.
+/// </summary>
+struct http_version
+{
+    uint8_t major;
+    uint8_t minor;
+
+    inline bool operator==(const http_version& other) const { return major == other.major && minor == other.minor; }
+    inline bool operator<(const http_version& other) const { return major < other.major || (major == other.major && minor < other.minor); }
+
+    inline bool operator!=(const http_version& other) const { return !(*this == other); }
+    inline bool operator>=(const http_version& other) const { return !(*this < other); }
+    inline bool operator>(const http_version& other) const { return !(*this < other || *this == other); }
+    inline bool operator<=(const http_version& other) const { return *this < other || *this == other; }
+};
+
+/// <summary>
+/// Predefined HTTP protocol versions.
+/// </summary>
+class http_versions
+{
+public:
+    _ASYNCRTIMP static const http_version HTTP_0_9;
+    _ASYNCRTIMP static const http_version HTTP_1_0;
+    _ASYNCRTIMP static const http_version HTTP_1_1;
+};
+
 /// <summary>
 /// Predefined method strings for the standard HTTP methods mentioned in the
 /// HTTP 1.1 specification.
@@ -715,6 +743,8 @@ class _http_request final : public http::details::http_msg_base, public std::ena
 
     _ASYNCRTIMP void set_request_uri(const uri&);
 
+    http::http_version http_version() const { return m_http_version; }
+
     const utility::string_t& remote_address() const { return m_remote_address; }
 
     const pplx::cancellation_token &cancellation_token() const { return m_cancellationToken; }
@@ -757,6 +787,8 @@ class _http_request final : public http::details::http_msg_base, public std::ena
 
     void _set_base_uri(const http::uri &base_uri) { m_base_uri = base_uri; }
 
+    void _set_http_version(const http::http_version &http_version) { m_http_version = http_version; }
+
     void _set_remote_address(const utility::string_t &remote_address) { m_remote_address = remote_address; }
 
 private:
@@ -783,6 +815,8 @@ class _http_request final : public http::details::http_msg_base, public std::ena
 
     pplx::task_completion_event<http_response> m_response;
 
+    http::http_version m_http_version;
+
     utility::string_t m_remote_address;
 };
 
@@ -875,10 +909,19 @@ class http_request
     /// </remarks>
     const http_headers &headers() const { return _m_impl->headers(); }
 
+    /// <summary>
+    /// Returns the HTTP protocol version of this request message.
+    /// </summary>
+    /// <returns>The HTTP protocol version.</returns>
+    http::http_version http_version() const { return _m_impl->http_version(); }
+
     /// <summary>
     /// Returns a string representation of the remote IP address.
     /// </summary>
     /// <returns>The remote IP address.</returns>
+    const utility::string_t& remote_address() const { return _m_impl->remote_address(); }
+
+    CASABLANCA_DEPRECATED("Use `remote_address()` instead.")
     const utility::string_t& get_remote_address() const { return _m_impl->remote_address(); }
 
     /// <summary>

Release/src/http/common/http_msg.cpp

@@ -998,7 +998,8 @@ details::_http_request::_http_request(http::method mtd)
   : m_method(std::move(mtd)),
     m_initiated_response(0),
     m_server_context(),
-    m_cancellationToken(pplx::cancellation_token::none())
+    m_cancellationToken(pplx::cancellation_token::none()),
+    m_http_version(http::http_version{0, 0})
 {
     if(m_method.empty())
     {
@@ -1009,10 +1010,15 @@ details::_http_request::_http_request(http::method mtd)
 details::_http_request::_http_request(std::unique_ptr<http::details::_http_server_context> server_context)
   : m_initiated_response(0),
     m_server_context(std::move(server_context)),
-    m_cancellationToken(pplx::cancellation_token::none())
+    m_cancellationToken(pplx::cancellation_token::none()),
+    m_http_version(http::http_version{0, 0})
 {
 }
 
+const http_version http_versions::HTTP_0_9 = { 0, 9 };
+const http_version http_versions::HTTP_1_0 = { 1, 0 };
+const http_version http_versions::HTTP_1_1 = { 1, 1 };
+
 #define _METHODS
 #define DAT(a,b) const method methods::a = b;
 #include "cpprest/details/http_constants.dat"

Release/src/http/listener/http_server_asio.cpp

@@ -657,14 +657,32 @@ will_deref_and_erase_t asio_server_connection::handle_http_line(const boost::sys
 
         // Get the version
         std::string http_version = http_path_and_version.substr(http_path_and_version.size() - VersionPortionSize + 1, VersionPortionSize - 2);
+
+        auto m_request_impl = m_request._get_impl().get();
+        web::http::http_version parsed_version = { 0, 0 };
+        if (boost::starts_with(http_version, "HTTP/"))
+        {
+            std::istringstream version{ http_version.substr(5) };
+            version >> parsed_version.major;
+            char dot; version >> dot;
+            version >> parsed_version.minor;
+
+            m_request_impl->_set_http_version(parsed_version);
+        }
+
         // if HTTP version is 1.0 then disable pipelining
-        if (http_version == "HTTP/1.0")
+        if (parsed_version == web::http::http_versions::HTTP_1_0)
         {
             m_close = true;
         }
 
         // Get the remote IP address
-        m_request._get_impl()->_set_remote_address(utility::conversions::to_string_t(m_socket->remote_endpoint().address().to_string()));
+        boost::system::error_code socket_ec;
+        auto endpoint = m_socket->remote_endpoint(socket_ec);
+        if (!socket_ec)
+        {
+            m_request._get_impl()->_set_remote_address(utility::conversions::to_string_t(endpoint.address().to_string()));
+        }
 
         return handle_headers();
     }

Release/src/http/listener/http_server_httpsys.cpp

@@ -560,6 +560,8 @@ void windows_request_context::read_headers_io_completion(DWORD error_code, DWORD
         m_msg.set_method(parse_request_method(m_request));
         parse_http_headers(m_request->Headers, m_msg.headers());
 
+        m_msg._get_impl()->_set_http_version({ (uint8_t)m_request->Version.MajorVersion, (uint8_t)m_request->Version.MinorVersion });
+
         // Retrieve the remote IP address
         std::vector<wchar_t> remoteAddressBuffer(50);
 

Release/tests/functional/http/listener/request_handler_tests.cpp

@@ -448,6 +448,39 @@ TEST_FIXTURE(uri_address, test_leaks)
     listener.close().wait();
 }
 
+TEST_FIXTURE(uri_address, http_version)
+{
+    http_listener listener(U("http://localhost:45678/path1"));
+    listener.open().wait();
+
+    test_http_client::scoped_client client(U("http://localhost:45678"));
+    test_http_client * p_client = client.client();
+
+    volatile unsigned long requestCount = 0;
+
+    listener.support(methods::GET, [&requestCount](http_request request)
+    {
+        const auto& httpVersion = request.http_version();
+
+        // All clients currently use HTTP/1.1
+        VERIFY_IS_TRUE(httpVersion == http_versions::HTTP_1_1);
+
+        os_utilities::interlocked_increment(&requestCount);
+        request.reply(status_codes::NoContent);
+    });
+
+    // Send a request to the listener
+    VERIFY_ARE_EQUAL(0, p_client->request(methods::GET, U("/path1")));
+
+    p_client->next_response().then([](test_response *p_response)
+    {
+        http_asserts::assert_test_response_equals(p_response, status_codes::NoContent);
+    }).wait();
+
+    VERIFY_IS_TRUE(requestCount >= 1);
+    listener.close().wait();
+}
+
 TEST_FIXTURE(uri_address, remote_address)
 {
     http_listener listener(U("http://localhost:45678/path1"));
@@ -460,7 +493,7 @@ TEST_FIXTURE(uri_address, remote_address)
 
     listener.support(methods::GET, [&requestCount](http_request request)
     {
-        const string_t& remoteAddr = request.get_remote_address();
+        const string_t& remoteAddr = request.remote_address();
         const string_t& localhost4 = string_t(U("127.0.0.1"));
         const string_t& localhost6 = string_t(U("::1"));