add streaming websocket server and client (#62)

cmake/asio.cmake

@@ -0,0 +1,39 @@
+function(download_asio)
+  include(FetchContent)
+
+  set(asio_URL  "https://github.com/chriskohlhoff/asio/archive/refs/tags/asio-1-24-0.tar.gz")
+  set(asio_HASH "SHA256=cbcaaba0f66722787b1a7c33afe1befb3a012b5af3ad7da7ff0f6b8c9b7a8a5b")
+
+  # If you don't have access to the Internet,
+  # please pre-download asio
+  set(possible_file_locations
+    $ENV{HOME}/Downloads/asio-asio-1-24-0.tar.gz
+    ${PROJECT_SOURCE_DIR}/asio-asio-1-24-0.tar.gz
+    ${PROJECT_BINARY_DIR}/asio-asio-1-24-0.tar.gz
+    /tmp/asio-asio-1-24-0.tar.gz
+    /star-fj/fangjun/download/github/asio-asio-1-24-0.tar.gz
+  )
+
+  foreach(f IN LISTS possible_file_locations)
+    if(EXISTS ${f})
+      set(asio_URL  "file://${f}")
+      break()
+    endif()
+  endforeach()
+
+  FetchContent_Declare(asio
+    URL               ${asio_URL}
+    URL_HASH          ${asio_HASH}
+  )
+
+  FetchContent_GetProperties(asio)
+  if(NOT asio_POPULATED)
+    message(STATUS "Downloading asio ${asio_URL}")
+    FetchContent_Populate(asio)
+  endif()
+  message(STATUS "asio is downloaded to ${asio_SOURCE_DIR}")
+  # add_subdirectory(${asio_SOURCE_DIR} ${asio_BINARY_DIR} EXCLUDE_FROM_ALL)
+  include_directories(${asio_SOURCE_DIR}/asio/include)
+endfunction()
+
+download_asio()

cmake/websocketpp.cmake

@@ -0,0 +1,40 @@
+function(download_websocketpp)
+  include(FetchContent)
+
+  # The latest commit on the develop branch os as 2022-10-22
+  set(websocketpp_URL  "https://github.com/zaphoyd/websocketpp/archive/b9aeec6eaf3d5610503439b4fae3581d9aff08e8.zip")
+  set(websocketpp_HASH "SHA256=1385135ede8191a7fbef9ec8099e3c5a673d48df0c143958216cd1690567f583")
+
+  # If you don't have access to the Internet,
+  # please pre-download websocketpp
+  set(possible_file_locations
+    $ENV{HOME}/Downloads/websocketpp-b9aeec6eaf3d5610503439b4fae3581d9aff08e8.zip
+    ${PROJECT_SOURCE_DIR}/websocketpp-b9aeec6eaf3d5610503439b4fae3581d9aff08e8.zip
+    ${PROJECT_BINARY_DIR}/websocketpp-b9aeec6eaf3d5610503439b4fae3581d9aff08e8.zip
+    /tmp/websocketpp-b9aeec6eaf3d5610503439b4fae3581d9aff08e8.zip
+    /star-fj/fangjun/download/github/websocketpp-b9aeec6eaf3d5610503439b4fae3581d9aff08e8.zip
+  )
+
+  foreach(f IN LISTS possible_file_locations)
+    if(EXISTS ${f})
+      set(websocketpp_URL  "file://${f}")
+      break()
+    endif()
+  endforeach()
+
+  FetchContent_Declare(websocketpp
+    URL               ${websocketpp_URL}
+    URL_HASH          ${websocketpp_HASH}
+  )
+
+  FetchContent_GetProperties(websocketpp)
+  if(NOT websocketpp_POPULATED)
+    message(STATUS "Downloading websocketpp from ${websocketpp_URL}")
+    FetchContent_Populate(websocketpp)
+  endif()
+  message(STATUS "websocketpp is downloaded to ${websocketpp_SOURCE_DIR}")
+  # add_subdirectory(${websocketpp_SOURCE_DIR} ${websocketpp_BINARY_DIR} EXCLUDE_FROM_ALL)
+  include_directories(${websocketpp_SOURCE_DIR})
+endfunction()
+
+download_websocketpp()