diff --git a/Release/CMakeLists.txt b/Release/CMakeLists.txt
index 6d2521b016..000516e1be 100644
--- a/Release/CMakeLists.txt
+++ b/Release/CMakeLists.txt
@@ -61,6 +61,7 @@ endif()
 
 include(cmake/cpprest_find_boost.cmake)
 include(cmake/cpprest_find_zlib.cmake)
+include(cmake/cpprest_find_winhttppal.cmake)
 include(cmake/cpprest_find_openssl.cmake)
 include(cmake/cpprest_find_websocketpp.cmake)
 include(cmake/cpprest_find_brotli.cmake)
diff --git a/Release/cmake/cpprest_find_winhttppal.cmake b/Release/cmake/cpprest_find_winhttppal.cmake
new file mode 100644
index 0000000000..9a6840fba2
--- /dev/null
+++ b/Release/cmake/cpprest_find_winhttppal.cmake
@@ -0,0 +1,17 @@
+function(cpprest_find_winhttppal)
+  if(TARGET cpprestsdk_winhttppal_internal)
+    return()
+  endif()
+
+  if(NOT WINHTTPPAL_LIBRARY OR NOT WINHTTPPAL_INCLUDE_DIRS)
+    find_package(winhttppal REQUIRED)
+  endif()
+
+  add_library(cpprestsdk_winhttppal_internal INTERFACE)
+  if(TARGET winhttppal::winhttppal)
+    target_link_libraries(cpprestsdk_winhttppal_internal INTERFACE winhttppal::winhttppal)
+  else()
+    target_link_libraries(cpprestsdk_winhttppal_internal INTERFACE "$<BUILD_INTERFACE:${WINHTTPPAL_LIBRARY}>")
+    target_include_directories(cpprestsdk_winhttppal_internal INTERFACE "$<BUILD_INTERFACE:${WINHTTPPAL_INCLUDE_DIRS}>")
+  endif()
+endfunction()
diff --git a/Release/cmake/cpprestsdk-config.in.cmake b/Release/cmake/cpprestsdk-config.in.cmake
index 8b5e8a6ff3..be95abf99a 100644
--- a/Release/cmake/cpprestsdk-config.in.cmake
+++ b/Release/cmake/cpprestsdk-config.in.cmake
@@ -11,6 +11,10 @@ if(@CPPREST_USES_OPENSSL@)
   find_dependency(OpenSSL)
 endif()
 
+if(@CPPREST_USES_WINHTTPPAL@)
+  find_dependency(WINHTTPPAL)
+endif()
+
 if(@CPPREST_USES_BOOST@ AND OFF)
   if(UNIX)
     find_dependency(Boost COMPONENTS random system thread filesystem chrono atomic date_time regex)
diff --git a/Release/include/cpprest/http_client.h b/Release/include/cpprest/http_client.h
index 0bedfbd42a..82fa3222b6 100644
--- a/Release/include/cpprest/http_client.h
+++ b/Release/include/cpprest/http_client.h
@@ -104,7 +104,7 @@ class http_client_config
 #if !defined(_WIN32) && !defined(__cplusplus_winrt) || defined(CPPREST_FORCE_HTTP_CLIENT_ASIO)
         , m_tlsext_sni_enabled(true)
 #endif
-#if defined(_WIN32) && !defined(__cplusplus_winrt)
+#if (defined(_WIN32) && !defined(__cplusplus_winrt)) || defined(CPPREST_FORCE_HTTP_CLIENT_WINHTTPPAL)
         , m_buffer_request(false)
 #endif
     {
@@ -262,7 +262,7 @@ class http_client_config
     void set_validate_certificates(bool validate_certs) { m_validate_certificates = validate_certs; }
 #endif
 
-#if defined(_WIN32) && !defined(__cplusplus_winrt)
+#if (defined(_WIN32) && !defined(__cplusplus_winrt)) || defined(CPPREST_FORCE_HTTP_CLIENT_WINHTTPPAL)
     /// <summary>
     /// Checks if request data buffering is turned on, the default is off.
     /// </summary>
@@ -389,7 +389,7 @@ class http_client_config
     std::function<void(boost::asio::ssl::context&)> m_ssl_context_callback;
     bool m_tlsext_sni_enabled;
 #endif
-#if defined(_WIN32) && !defined(__cplusplus_winrt)
+#if (defined(_WIN32) && !defined(__cplusplus_winrt)) || defined(CPPREST_FORCE_HTTP_CLIENT_WINHTTPPAL)
     bool m_buffer_request;
 #endif
 };
@@ -716,7 +716,7 @@ class http_client
 
 namespace details
 {
-#if defined(_WIN32)
+#if defined(_WIN32) || defined(CPPREST_FORCE_HTTP_CLIENT_WINHTTPPAL)
 extern const utility::char_t* get_with_body_err_msg;
 #endif
 
diff --git a/Release/src/CMakeLists.txt b/Release/src/CMakeLists.txt
index 119b07afe2..c9d0349a87 100644
--- a/Release/src/CMakeLists.txt
+++ b/Release/src/CMakeLists.txt
@@ -131,6 +131,13 @@ if(CPPREST_HTTP_CLIENT_IMPL STREQUAL "asio")
   target_compile_definitions(cpprest PUBLIC -DCPPREST_FORCE_HTTP_CLIENT_ASIO)
   target_sources(cpprest PRIVATE http/client/http_client_asio.cpp http/client/x509_cert_utilities.cpp)
   target_link_libraries(cpprest PUBLIC cpprestsdk_boost_internal cpprestsdk_openssl_internal)
+elseif(CPPREST_HTTP_CLIENT_IMPL STREQUAL "winhttppal")
+  cpprest_find_boost()
+  cpprest_find_openssl()
+  cpprest_find_winhttppal()
+  target_compile_definitions(cpprest PUBLIC -DCPPREST_FORCE_HTTP_CLIENT_WINHTTPPAL)
+  target_sources(cpprest PRIVATE http/client/http_client_winhttp.cpp http/client/x509_cert_utilities.cpp)
+  target_link_libraries(cpprest PUBLIC cpprestsdk_boost_internal cpprestsdk_openssl_internal cpprestsdk_winhttppal_internal)
 elseif(CPPREST_HTTP_CLIENT_IMPL STREQUAL "winhttp")
   target_link_libraries(cpprest PRIVATE
     httpapi.lib
@@ -237,6 +244,7 @@ if(CPPREST_INSTALL)
   set(CPPREST_USES_ZLIB OFF)
   set(CPPREST_USES_BROTLI OFF)
   set(CPPREST_USES_OPENSSL OFF)
+  set(CPPREST_USES_WINHTTPPAL OFF)
 
   set(CPPREST_TARGETS cpprest)
   if(TARGET cpprestsdk_boost_internal)
@@ -255,6 +263,10 @@ if(CPPREST_INSTALL)
     list(APPEND CPPREST_TARGETS cpprestsdk_openssl_internal)
     set(CPPREST_USES_OPENSSL ON)
   endif()
+  if(TARGET cpprestsdk_winhttppal_internal)
+    list(APPEND CPPREST_TARGETS cpprestsdk_winhttppal_internal)
+    set(CPPREST_USES_WINHTTPPAL ON)
+  endif()
   if(TARGET cpprestsdk_websocketpp_internal)
     list(APPEND CPPREST_TARGETS cpprestsdk_websocketpp_internal)
   endif()
diff --git a/Release/src/http/client/http_client.cpp b/Release/src/http/client/http_client.cpp
index f3174272bb..09e3eed15a 100644
--- a/Release/src/http/client/http_client.cpp
+++ b/Release/src/http/client/http_client.cpp
@@ -41,8 +41,8 @@ static void verify_uri(const uri& uri)
 
 namespace details
 {
-#if defined(_WIN32)
-extern const utility::char_t* get_with_body_err_msg =
+#if defined(_WIN32) || defined(CPPREST_FORCE_HTTP_CLIENT_WINHTTPPAL)
+const utility::char_t* get_with_body_err_msg =
     _XPLATSTR("A GET or HEAD request should not have an entity body.");
 #endif
 
diff --git a/Release/src/http/client/http_client_impl.h b/Release/src/http/client/http_client_impl.h
index 384c9b2de6..d9e7d4829e 100644
--- a/Release/src/http/client/http_client_impl.h
+++ b/Release/src/http/client/http_client_impl.h
@@ -30,13 +30,10 @@ namespace details
 /// Serialize the http_headers into name:value pairs separated by a carriage return and line feed.
 /// </summary>
 utility::string_t flatten_http_headers(const http_headers& headers);
-#if defined(_WIN32)
 /// <summary>
 /// Parses a string containing Http headers.
 /// </summary>
-void parse_headers_string(_Inout_z_ utf16char* headersStr, http_headers& headers);
-#endif
-
+void parse_headers_string(_Inout_z_ utility::char_t* headersStr, http_headers& headers);
 } // namespace details
 } // namespace http
 } // namespace web
diff --git a/Release/src/http/client/http_client_winhttp.cpp b/Release/src/http/client/http_client_winhttp.cpp
index f4b97f509a..fc2bfbae8c 100644
--- a/Release/src/http/client/http_client_winhttp.cpp
+++ b/Release/src/http/client/http_client_winhttp.cpp
@@ -18,10 +18,15 @@
 #include "../common/internal_http_helpers.h"
 #include "cpprest/http_headers.h"
 #include "http_client_impl.h"
+#ifdef WIN32
 #include <Wincrypt.h>
+#endif
+#if defined(CPPREST_FORCE_HTTP_CLIENT_WINHTTPPAL)
+#include "winhttppal.h"
+#endif
 #include <atomic>
 
-#if _WIN32_WINNT >= _WIN32_WINNT_VISTA
+#if _WIN32_WINNT && (_WIN32_WINNT >= _WIN32_WINNT_VISTA)
 #include <VersionHelpers.h>
 #endif
 
@@ -97,7 +102,7 @@ static http::status_code parse_status_code(HINTERNET request_handle)
                         &buffer[0],
                         &length,
                         WINHTTP_NO_HEADER_INDEX);
-    return (unsigned short)_wtoi(buffer.c_str());
+    return (unsigned short)stoi(buffer);
 }
 
 // Helper function to get the reason phrase from a WinHTTP response.
@@ -122,7 +127,7 @@ static utility::string_t parse_reason_phrase(HINTERNET request_handle)
 /// <summary>
 /// Parses a string containing HTTP headers.
 /// </summary>
-static void parse_winhttp_headers(HINTERNET request_handle, _In_z_ utf16char* headersStr, http_response& response)
+static void parse_winhttp_headers(HINTERNET request_handle, _In_z_ utility::char_t* headersStr, http_response& response)
 {
     // Clear the header map for each new response; otherwise, the header values will be combined.
     response.headers().clear();
@@ -141,7 +146,7 @@ static std::string build_error_msg(unsigned long code, const std::string& locati
     msg.append(": ");
     msg.append(std::to_string(code));
     msg.append(": ");
-    msg.append(utility::details::windows_category().message(code));
+    msg.append(utility::details::platform_category().message(static_cast<int>(code)));
     return msg;
 }
 
@@ -159,6 +164,7 @@ static std::string build_error_msg(_In_ WINHTTP_ASYNC_RESULT* error_result)
     }
 }
 
+
 class memory_holder
 {
     uint8_t* m_externalData;
@@ -289,7 +295,7 @@ class winhttp_request_context final : public request_context
         {
         }
 
-#if defined(_MSC_VER) && _MSC_VER < 1900
+#if (defined(_MSC_VER) && _MSC_VER < 1900) || defined(CPPREST_FORCE_HTTP_CLIENT_WINHTTPPAL)
         compression_state(const compression_state&) = delete;
         compression_state(compression_state&& other)
             : m_buffer(std::move(other.m_buffer))
@@ -552,6 +558,10 @@ class winhttp_request_context final : public request_context
 
     void on_send_request_validate_cn()
     {
+#if defined(CPPREST_FORCE_HTTP_CLIENT_WINHTTPPAL)
+        // we do the validation inside curl
+        return;
+#else
         if (m_customCnCheck.empty())
         {
             // no custom validation selected; either we've delegated that to winhttp or
@@ -647,6 +657,7 @@ class winhttp_request_context final : public request_context
         }
 
         m_cachedEncodedCert.assign(encodedFirst, encodedLast);
+#endif
     }
 
 protected:
@@ -666,13 +677,13 @@ class winhttp_request_context final : public request_context
     winhttp_request_context(const std::shared_ptr<_http_client_communicator>& client, const http_request& request)
         : request_context(client, request)
         , m_request_handle(nullptr)
-        , m_bodyType(no_body)
-        , m_startingPosition(std::char_traits<uint8_t>::eof())
-        , m_body_data()
-        , m_remaining_to_write(0)
         , m_proxy_authentication_tried(false)
         , m_server_authentication_tried(false)
+        , m_bodyType(no_body)
+        , m_remaining_to_write(0)
+        , m_startingPosition(std::char_traits<uint8_t>::eof())
         , m_readStream(request.body())
+        , m_body_data()
     {
     }
 };
@@ -731,10 +742,10 @@ class winhttp_client final : public _http_client_communicator
 public:
     winhttp_client(http::uri address, http_client_config client_config)
         : _http_client_communicator(std::move(address), std::move(client_config))
-        , m_secure(m_uri.scheme() == _XPLATSTR("https"))
         , m_opened(false)
         , m_hSession(nullptr)
         , m_hConnection(nullptr)
+        , m_secure(m_uri.scheme() == _XPLATSTR("https"))
     {
     }
 
@@ -752,7 +763,7 @@ class winhttp_client final : public _http_client_communicator
         if (m_hSession != nullptr)
         {
             // Unregister the callback.
-            WinHttpSetStatusCallback(m_hSession, nullptr, WINHTTP_CALLBACK_FLAG_ALL_NOTIFICATIONS, NULL);
+            WinHttpSetStatusCallback(m_hSession, nullptr, WINHTTP_CALLBACK_FLAG_ALL_NOTIFICATIONS, 0);
 
             WinHttpCloseHandle(m_hSession);
         }
@@ -792,8 +803,8 @@ class winhttp_client final : public _http_client_communicator
         ie_proxy_config proxyIE;
 
         DWORD access_type;
-        LPCWSTR proxy_name = WINHTTP_NO_PROXY_NAME;
-        LPCWSTR proxy_bypass = WINHTTP_NO_PROXY_BYPASS;
+        LPCTSTR proxy_name = WINHTTP_NO_PROXY_NAME;
+        LPCTSTR proxy_bypass = WINHTTP_NO_PROXY_BYPASS;
         m_proxy_auto_config = false;
         utility::string_t proxy_str;
         http::uri uri;
@@ -901,7 +912,7 @@ class winhttp_client final : public _http_client_communicator
         }
 
         // Enable TLS 1.1 and 1.2
-#if _WIN32_WINNT >= _WIN32_WINNT_VISTA
+#if (_WIN32_WINNT >= _WIN32_WINNT_VISTA) || defined(CPPREST_FORCE_HTTP_CLIENT_WINHTTPPAL)
         BOOL win32_result(FALSE);
 
         DWORD secure_protocols(WINHTTP_FLAG_SECURE_PROTOCOL_SSL3 | WINHTTP_FLAG_SECURE_PROTOCOL_TLS1 |
@@ -965,6 +976,17 @@ class winhttp_client final : public _http_client_communicator
         proxy_info info;
         bool proxy_info_required = false;
 
+        const auto& method = msg.method();
+
+        // stop injection of headers via method
+        // resource should be ok, since it's been encoded
+        // and host won't resolve
+        if (!::web::http::details::validate_method(method))
+        {
+            request->report_exception(http_exception("The method string is invalid."));
+            return;
+        }
+
         if (m_proxy_auto_config)
         {
             WINHTTP_AUTOPROXY_OPTIONS autoproxy_options {};
@@ -1416,7 +1438,6 @@ class winhttp_client final : public _http_client_communicator
                 {
                     return pplx::task_from_exception<size_t>(std::current_exception());
                 }
-                _ASSERTE(bytes_read >= 0);
 
                 uint8_t* buffer = p_request_context->m_compression_state.m_acquired;
                 if (buffer == nullptr)
@@ -1689,16 +1710,16 @@ class winhttp_client final : public _http_client_communicator
         }
     }
 
-    static std::wstring get_request_url(HINTERNET hRequestHandle)
+    static utility::string_t get_request_url(HINTERNET hRequestHandle)
     {
-        std::wstring url;
+        utility::string_t url;
         auto urlSize = static_cast<unsigned long>(url.capacity()) * 2; // use initial small string optimization capacity
         for (;;)
         {
-            url.resize(urlSize / sizeof(wchar_t));
-            if (WinHttpQueryOption(hRequestHandle, WINHTTP_OPTION_URL, &url[0], &urlSize))
+            url.resize(urlSize / sizeof(utility::char_t));
+            if (WinHttpQueryOption(hRequestHandle, WINHTTP_OPTION_URL, &url[0], (LPDWORD)&urlSize))
             {
-                url.resize(wcslen(url.c_str()));
+                url.resize(url.length());
                 return url;
             }
 
@@ -2014,7 +2035,7 @@ class winhttp_client final : public _http_client_communicator
                 // Now allocate buffer for headers and query for them.
                 std::vector<unsigned char> header_raw_buffer;
                 header_raw_buffer.resize(headerBufferLength);
-                utf16char* header_buffer = reinterpret_cast<utf16char*>(&header_raw_buffer[0]);
+                utility::char_t* header_buffer = reinterpret_cast<utility::char_t*>(&header_raw_buffer[0]);
                 if (!WinHttpQueryHeaders(hRequestHandle,
                                          WINHTTP_QUERY_RAW_HEADERS_CRLF,
                                          WINHTTP_HEADER_NAME_BY_INDEX,
@@ -2052,7 +2073,7 @@ class winhttp_client final : public _http_client_communicator
                     !p_request_context->m_http_client->client_config().request_compressed_response())
                 {
                     p_request_context->m_compression_state.m_chunk =
-                        std::make_unique<winhttp_request_context::compression_state::_chunk_helper>();
+                        ::utility::details::make_unique<winhttp_request_context::compression_state::_chunk_helper>();
                     p_request_context->m_compression_state.m_chunked = true;
                 }
 
@@ -2390,7 +2411,7 @@ class winhttp_client final : public _http_client_communicator
                     }).then([p_request_context](pplx::task<bool> op) {
                         try
                         {
-                            bool ignored = op.get();
+                            op.get();
                         }
                         catch (...)
                         {
@@ -2466,6 +2487,7 @@ std::shared_ptr<_http_client_communicator> create_platform_final_pipeline_stage(
     return std::make_shared<details::winhttp_client>(std::move(base_uri), std::move(client_config));
 }
 
+
 } // namespace details
 } // namespace client
 } // namespace http
diff --git a/Release/src/http/common/http_msg.cpp b/Release/src/http/common/http_msg.cpp
index c32dfcfaaa..a3c51c62a1 100644
--- a/Release/src/http/common/http_msg.cpp
+++ b/Release/src/http/common/http_msg.cpp
@@ -225,27 +225,27 @@ utility::string_t flatten_http_headers(const http_headers& headers)
     return flattened_headers;
 }
 
-#if defined(_WIN32)
-void parse_headers_string(_Inout_z_ utf16char* headersStr, http_headers& headers)
+void parse_headers_string(_Inout_z_ utility::char_t* headersStr, web::http::http_headers& headers)
 {
-    utf16char* context = nullptr;
-    utf16char* line = wcstok_s(headersStr, CRLF, &context);
-    while (line != nullptr)
+    utility::string_t str(headersStr);
+    std::size_t pos = str.find_first_of(_XPLATSTR("\r\n"));
+    std::size_t startpos = 0;
+    while (pos!=std::string::npos)
     {
-        const utility::string_t header_line(line);
+        const utility::string_t header_line(str, startpos, pos - startpos);
         const size_t colonIndex = header_line.find_first_of(_XPLATSTR(":"));
         if (colonIndex != utility::string_t::npos)
         {
             utility::string_t key = header_line.substr(0, colonIndex);
             utility::string_t value = header_line.substr(colonIndex + 1, header_line.length() - colonIndex - 1);
-            http::details::trim_whitespace(key);
-            http::details::trim_whitespace(value);
+            web::http::details::trim_whitespace(key);
+            web::http::details::trim_whitespace(value);
             headers.add(key, value);
         }
-        line = wcstok_s(nullptr, CRLF, &context);
+        startpos = pos + 1;
+        pos = str.find_first_of(_XPLATSTR("\r\n"), pos + 1);
     }
 }
-#endif
 
 } // namespace details
 
diff --git a/Release/tests/functional/http/client/client_construction.cpp b/Release/tests/functional/http/client/client_construction.cpp
index 1229b2cfd7..f5d20b8379 100644
--- a/Release/tests/functional/http/client/client_construction.cpp
+++ b/Release/tests/functional/http/client/client_construction.cpp
@@ -173,7 +173,7 @@ SUITE(client_construction)
         VERIFY_ARE_EQUAL(baseclient2.base_uri(), m_uri);
     }
 
-#if !defined(_WIN32) && !defined(__cplusplus_winrt)
+#if defined(CPPREST_FORCE_HTTP_LISTENER_ASIO)
 
     // Verify that the callback of sslcontext is called for HTTPS
     TEST_FIXTURE(uri_address, ssl_context_callback_https)
diff --git a/Release/tests/functional/http/client/outside_tests.cpp b/Release/tests/functional/http/client/outside_tests.cpp
index 3ff1a809ec..05bb306e7a 100644
--- a/Release/tests/functional/http/client/outside_tests.cpp
+++ b/Release/tests/functional/http/client/outside_tests.cpp
@@ -228,7 +228,7 @@ SUITE(outside_tests)
 
     TEST(server_hostname_mismatch) { test_failed_ssl_cert(U("https://wrong.host.badssl.com/")); }
 
-#if !defined(__cplusplus_winrt)
+#if !defined(__cplusplus_winrt) && !defined(CPPREST_FORCE_HTTP_CLIENT_WINHTTPPAL)
     TEST(server_hostname_host_override)
     {
         handle_timeout([] {
@@ -253,7 +253,7 @@ SUITE(outside_tests)
         const auto statusCode = response.status_code();
         CHECK(statusCode == status_codes::OK || statusCode == status_codes::MovedPermanently);
     }
-#endif // !defined(__cplusplus_winrt)
+#endif // !defined(__cplusplus_winrt) && !defined(CPPREST_FORCE_HTTP_CLIENT_WINHTTPPAL)
 
     TEST(server_cert_expired) { test_failed_ssl_cert(U("https://expired.badssl.com/")); }
 
diff --git a/Release/tests/functional/http/client/request_uri_tests.cpp b/Release/tests/functional/http/client/request_uri_tests.cpp
index c856b600e3..5d61556991 100644
--- a/Release/tests/functional/http/client/request_uri_tests.cpp
+++ b/Release/tests/functional/http/client/request_uri_tests.cpp
@@ -88,7 +88,7 @@ SUITE(request_uri_tests)
 
         // WinRT implementation percent encodes the '#'.
         utility::string_t expected_value = U("/heheh?key1=value2#fragment");
-#ifdef __cplusplus_winrt
+#if defined(__cplusplus_winrt) || defined(CPPREST_FORCE_HTTP_CLIENT_WINHTTPPAL)
         expected_value = percent_encode_pound(expected_value);
 #endif
 
@@ -137,7 +137,7 @@ SUITE(request_uri_tests)
             p_server->next_request().then([&](test_request* p_request) {
                 // WinRT implementation percent encodes the '#'.
                 utility::string_t expected_value = U("/path1?key1=value1&key2=value2#frag");
-#ifdef __cplusplus_winrt
+#if defined(__cplusplus_winrt) || defined(CPPREST_FORCE_HTTP_CLIENT_WINHTTPPAL)
                 expected_value = percent_encode_pound(expected_value);
 #endif
                 http_asserts::assert_test_request_equals(p_request, methods::GET, expected_value);
@@ -157,7 +157,7 @@ SUITE(request_uri_tests)
             p_server->next_request().then([&](test_request* p_request) {
                 // WinRT implementation percent encodes the '#'.
                 utility::string_t expected_value = U("/path1/path2?key2=value2#fragmentfg2");
-#ifdef __cplusplus_winrt
+#if defined(__cplusplus_winrt) || defined(CPPREST_FORCE_HTTP_CLIENT_WINHTTPPAL)
                 expected_value = percent_encode_pound(expected_value);
 #endif
                 http_asserts::assert_test_request_equals(p_request, methods::GET, expected_value);
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 8fc6f54365..a5e397d0e8 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -214,3 +214,47 @@ jobs:
   #       cd Build_iOS
   #       ./configure.sh
   #     displayName: 'Build for iOS'
+  - job: Ubuntu_1604_Apt_winhttppal
+    pool:
+      vmImage: 'Ubuntu 16.04'
+    steps:
+    - script: |
+        set -e
+        sudo apt -y remove php*
+        sudo apt install -y ppa-purge
+        sudo ppa-purge -y ppa:ondrej/php
+        unset BOOST_ROOT
+        sudo apt install -y libboost-atomic-dev libboost-thread-dev libboost-system-dev libboost-date-time-dev libboost-regex-dev libboost-filesystem-dev libboost-random-dev libboost-chrono-dev libboost-serialization-dev libwebsocketpp-dev openssl libssl-dev ninja-build wget
+        wget http://curl.haxx.se/download/curl-7.57.0.tar.gz
+        sudo apt install -y libtool
+        sudo apt install -y make
+        tar -xvf curl-7.57.0.tar.gz
+        cd curl-7.57.0
+        ./buildconf
+        ./configure --with-ssl --prefix=/usr
+        make
+        sudo make install
+        cd ..
+        git clone https://github.com/microsoft/WinHttpPAL.git
+        cd WinHttpPAL
+        mkdir build
+        cd build
+        cmake -DCMAKE_INSTALL_PREFIX:PATH=/usr ..
+        make
+        sudo make install
+        cd ../..
+        mkdir build.debug
+        cd build.debug
+        /usr/local/bin/cmake -G Ninja -DCMAKE_BUILD_TYPE=Debug -DCPPREST_HTTP_CLIENT_IMPL=winhttppal ..
+        cd ..
+        mkdir build.release
+        cd build.release
+        /usr/local/bin/cmake -G Ninja -DCMAKE_BUILD_TYPE=Release -DCPPREST_HTTP_CLIENT_IMPL=winhttppal ..
+        cd ..
+        ninja -C build.debug
+        ninja -C build.release
+        cd build.debug/Release/Binaries
+        #./test_runner *test.so
+        cd ../../../build.release/Release/Binaries
+        #./test_runner *test.so
+      displayName: Run build