refactor: remove Boost dependency (#176)

- add the standalone ASIO as a replacement for Boost ASIO
- add Catch++ as a replacement for Boost Test framework
- remove dependency on Boost DateTime and Boost Lexical Cast

Author: 3p3r

.gitmodules

@@ -4,3 +4,9 @@
 [submodule "lib/rapidjson"]
 	path = lib/rapidjson
 	url = https://github.com/miloyip/rapidjson.git
+[submodule "lib/asio"]
+	path = lib/asio
+	url = https://github.com/chriskohlhoff/asio.git
+[submodule "lib/catch"]
+	path = lib/catch
+	url = https://github.com/philsquared/Catch.git

.travis.yml

@@ -5,14 +5,13 @@ compiler:
 
 before_install:
   - sudo apt-get install clang git libssl-dev
-  - sudo add-apt-repository -y ppa:boost-latest/ppa
   - sudo add-apt-repository -y ppa:kubuntu-ppa/backports
   - sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test -y
   - sudo apt-get update -yqq
-  - sudo apt-get install -y libboost1.55-dev libboost-system1.55-dev libboost-date-time1.55-dev libboost-random1.55-dev
   - sudo apt-get install -y cmake g++-4.8
   - sed -i -e 's/cmake_minimum_required(VERSION 3.1.0/cmake_minimum_required(VERSION 2.8.12/' ./CMakeLists.txt
 script:
-  - cmake -D CMAKE_CXX_FLAGS=-std=c++11 .
+  - cmake -D CMAKE_CXX_FLAGS=-std=c++11 -D BUILD_UNIT_TESTS=ON .
   - make
+  - make test
   - make install

BOOST.md

@@ -2,7 +2,7 @@ cmake_minimum_required(VERSION 3.1.0 FATAL_ERROR)
 PROJECT(sioclient)
 
 option(BUILD_SHARED_LIBS "Build the shared library" OFF)
-option(Boost_USE_STATIC_LIBS "Use Boost static version" ON)
+option(BUILD_UNIT_TESTS  "Builds unit tests target" OFF)
 
 set(MAJOR 1)
 set(MINOR 6)
@@ -16,27 +16,32 @@ MESSAGE(SEND_ERROR "CMAKE_BUILD_TYPE must be either Release or Debug")
 return()
 endif()
 
-set(BOOST_VER "1.55.0" CACHE STRING "boost version" )
-
-set(Boost_USE_MULTITHREADED ON) 
-set(Boost_USE_STATIC_RUNTIME OFF) 
-find_package(Boost ${BOOST_VER} REQUIRED COMPONENTS system date_time random) 
-
 aux_source_directory(${CMAKE_CURRENT_LIST_DIR}/src ALL_SRC)
 aux_source_directory(${CMAKE_CURRENT_LIST_DIR}/src/internal ALL_SRC)
 file(GLOB ALL_HEADERS ${CMAKE_CURRENT_LIST_DIR}/src/*.h )
 set(SIO_INCLUDEDIR ${CMAKE_CURRENT_LIST_DIR})
 
+add_definitions(
+    # These will force ASIO to compile without Boost
+    -DBOOST_DATE_TIME_NO_LIB
+    -DBOOST_REGEX_NO_LIB
+    -DASIO_STANDALONE
+    # These will force WebsocketPP to compile with C++11
+    -D_WEBSOCKETPP_CPP11_STL_
+    -D_WEBSOCKETPP_CPP11_FUNCTIONAL_
+)
+
 add_library(sioclient ${ALL_SRC})
-target_include_directories(sioclient PRIVATE ${Boost_INCLUDE_DIRS} 
+target_include_directories(sioclient PRIVATE 
     ${CMAKE_CURRENT_LIST_DIR}/src 
     ${CMAKE_CURRENT_LIST_DIR}/lib/websocketpp 
     ${CMAKE_CURRENT_LIST_DIR}/lib/rapidjson/include
+    ${CMAKE_CURRENT_LIST_DIR}/lib/asio/asio/include
 )
 
 set_property(TARGET sioclient PROPERTY CXX_STANDARD 11)
 set_property(TARGET sioclient PROPERTY CXX_STANDARD_REQUIRED ON)
-target_link_libraries(sioclient PRIVATE ${Boost_LIBRARIES})
+
 if(BUILD_SHARED_LIBS)
 set_target_properties(sioclient
 	PROPERTIES
@@ -49,16 +54,17 @@ list(APPEND TARGET_LIBRARIES sioclient)
 find_package(OpenSSL)
 if(OPENSSL_FOUND)
 add_library(sioclient_tls ${ALL_SRC})
-target_include_directories(sioclient_tls PRIVATE ${Boost_INCLUDE_DIRS} 
+target_include_directories(sioclient_tls PRIVATE
     ${CMAKE_CURRENT_LIST_DIR}/src 
     ${CMAKE_CURRENT_LIST_DIR}/lib/websocketpp 
     ${CMAKE_CURRENT_LIST_DIR}/lib/rapidjson/include
+    ${CMAKE_CURRENT_LIST_DIR}/lib/asio/asio/include
     ${OPENSSL_INCLUDE_DIR}
 )
 
 set_property(TARGET sioclient_tls PROPERTY CXX_STANDARD 11)
 set_property(TARGET sioclient_tls PROPERTY CXX_STANDARD_REQUIRED ON)
-target_link_libraries(sioclient_tls PRIVATE ${Boost_LIBRARIES} ${OPENSSL_LIBRARIES} )
+target_link_libraries(sioclient_tls PRIVATE ${OPENSSL_LIBRARIES} )
 target_compile_definitions(sioclient_tls PRIVATE -DSIO_TLS)
 if(BUILD_SHARED_LIBS)
 set_target_properties(sioclient_tls
@@ -79,6 +85,8 @@ install(TARGETS ${TARGET_LIBRARIES}
     DESTINATION "${CMAKE_CURRENT_LIST_DIR}/build/lib/${CMAKE_BUILD_TYPE}"
 )
 
-install(FILES ${Boost_LIBRARIES} 
-    DESTINATION "${CMAKE_CURRENT_LIST_DIR}/build/lib/${CMAKE_BUILD_TYPE}"
-)
+if(BUILD_UNIT_TESTS)
+message(STATUS "Building with unit test support.")
+enable_testing()
+add_subdirectory(test)
+endif()

CMakeLists.txt

@@ -1,48 +1,13 @@
 ## Install
 
 ### With CMake
-1. Install boost, see [Boost setup](#boost_setup) section.
-2. Use `git clone --recurse-submodules https://github.com/socketio/socket.io-client-cpp.git` to clone your local repo.
-3. Run `cmake -DBOOST_ROOT:STRING=<your boost install folder> -DBOOST_VER:STRING=<your boost version> ./`
-4. Run `make install`(if makefile generated) or open generated project (if project file generated) to build.
-5. Outputs is under `./build`, link with the all static libs under `./build/lib` and  include headers under `./build/include` in your client code where you want to use it.
-
-* If you're using boost without install,you can specify `boost include dir` and `boost lib dir` separately by:
-```bash
-cmake
--DBOOST_INCLUDEDIR=<your boost include folder>
--DBOOST_LIBRARYDIR=<your boost lib folder>
--DBOOST_VER:STRING=<your boost version>
-./
-```
-* CMake didn't allow merging static libraries,but they're all copied to `./build/lib`, you can DIY if you like.
+1. Use `git clone --recurse-submodules https://github.com/socketio/socket.io-client-cpp.git` to clone your local repo.
+2. Run `cmake  ./`
+3. Run `make install`(if makefile generated) or open generated project (if project file generated) to build.
+4. Outputs is under `./build`, link with the all static libs under `./build/lib` and  include headers under `./build/include` in your client code where you want to use it.
 
 ### Without CMake
-1. Install boost, see [Boost setup](#boost_setup) section.
-2. Use `git clone --recurse-submodules https://github.com/socketio/socket.io-client-cpp.git` to clone your local repo.
-3. Add `<your boost install folder>/include`,`./lib/websocketpp` and `./lib/rapidjson/include` to headers search path.
-4. Include all files under `./src` in your project, add `sio_client.cpp`,`sio_socket.cpp`,`internal/sio_client_impl.cpp`, `internal/sio_packet.cpp` to source list.
-5. Add `<your boost install folder>/lib` to library search path, add `boost.lib`(Win32) or `-lboost`(Other) link option.
-6. Include `sio_client.h` in your client code where you want to use it.
-
-## Boost setup
-
-1. Download boost from [boost.org](http://www.boost.org/).
-1. Unpack boost to some place.
-1. Run either .\bootstrap.bat (on Windows), or ./bootstrap.sh (on other operating systems) under boost folder.
-
-## Boost build (Build the necessary subset only)
-Windows (or other mainstream desktop platforms shall work too):
-
-The following script will build the necessary subset:
-
-```bash
-bjam install --prefix="<your boost install folder>" --with-system --with-date_time --with-random link=static runtime-link=shared threading=multi
-```
-Optionally You can merge all output .lib files into a fat one, especially if you're not using cmake.
-
-In output folder, run:
-
-```bash
-lib.exe /OUT:boost.lib *
-```
+1. Use `git clone --recurse-submodules https://github.com/socketio/socket.io-client-cpp.git` to clone your local repo.
+2. Add `./lib/asio/asio/include`, `./lib/websocketpp` and `./lib/rapidjson/include` to headers search path.
+3. Include all files under `./src` in your project, add `sio_client.cpp`,`sio_socket.cpp`,`internal/sio_client_impl.cpp`, `internal/sio_packet.cpp` to source list.
+4. Include `sio_client.h` in your client code where you want to use it.