switch back to boost::filesystem to avoid the requirement of c++17

CMakeLists.txt

@@ -41,14 +41,14 @@ if(WIN32)
 endif()
 
 # C++ standard requirements.
-set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD 11)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_CXX_EXTENSIONS OFF)
 
 # Boost
 set(Boost_USE_STATIC_LIBS ON)
 set(Boost_USE_MULTITHREADED ON)
-find_package(Boost 1.66.0 REQUIRED COMPONENTS system date_time)
+find_package(Boost 1.66.0 REQUIRED COMPONENTS system date_time filesystem)
 if(Boost_FOUND)
     message(STATUS "Boost version: ${Boost_VERSION}")
     include_directories(${Boost_INCLUDE_DIRS})

README.md

@@ -7,7 +7,7 @@
 
 [__中文版 README__](README_zh_CN.md)
 
-Lightweight C++ HTTP __client and server__ library based on [Asio](https://www.boost.org/doc/libs/release/libs/asio/) for __embedding__ purpose.
+Lightweight C++ HTTP __client and server__ library based on [Boost Asio](https://www.boost.org/doc/libs/release/libs/asio/) for __embedding__ purpose.
 
 => [Build Instructions](doc/Build-Instructions.md)
 

autotest/client_autotest.cc

@@ -1,7 +1,9 @@
-#include <filesystem>
 #include <fstream>
 #include <iostream>
 
+#include "boost/filesystem/fstream.hpp"
+#include "boost/filesystem/operations.hpp"
+
 #include "gtest/gtest.h"
 
 #include "json/json.h"
@@ -9,7 +11,7 @@
 #include "webcc/client_session.h"
 #include "webcc/string.h"
 
-namespace sfs = std::filesystem;
+namespace bfs = boost::filesystem;
 
 // -----------------------------------------------------------------------------
 
@@ -194,15 +196,15 @@ TEST(ClientTest, Get_Jpeg_Stream) {
     EXPECT_TRUE(!file_body->path().empty());
 
     // Backup the path of the temp file.
-    const sfs::path ori_path = file_body->path();
+    const bfs::path ori_path = file_body->path();
 
-    const sfs::path new_path("./wolf.jpeg");
+    const bfs::path new_path("./wolf.jpeg");
 
     bool moved = file_body->Move(new_path);
     EXPECT_TRUE(moved);
-    EXPECT_TRUE(sfs::exists(new_path));
+    EXPECT_TRUE(bfs::exists(new_path));
     // The file in the original path should not exist any more.
-    EXPECT_TRUE(!sfs::exists(ori_path));
+    EXPECT_TRUE(!bfs::exists(ori_path));
 
     // After move, the original path should be reset.
     EXPECT_TRUE(file_body->path().empty());
@@ -218,7 +220,7 @@ TEST(ClientTest, Get_Jpeg_Stream_NoMove) {
   webcc::ClientSession session;
 
   try {
-    sfs::path ori_path;
+    bfs::path ori_path;
 
     {
       auto r = session.Send(webcc::RequestBuilder{}.
@@ -236,7 +238,7 @@ TEST(ClientTest, Get_Jpeg_Stream_NoMove) {
     }
 
     // The temp file should be deleted.
-    EXPECT_TRUE(!sfs::exists(ori_path));
+    EXPECT_TRUE(!bfs::exists(ori_path));
 
   } catch (const webcc::Error& error) {
     std::cerr << error << std::endl;
@@ -309,23 +311,22 @@ TEST(ClientTest, Post) {
   }
 }
 
-static sfs::path GenerateTempFile(const std::string& data) {
+static bfs::path GenerateTempFile(const std::string& data) {
   try {
-    sfs::path path =
+    bfs::path path = bfs::temp_directory_path() / webcc::random_string(10);
-        sfs::temp_directory_path() / webcc::random_string(10);
 
-    std::ofstream ofs;
+    bfs::ofstream ofs;
     ofs.open(path, std::ios::binary);
     if (ofs.fail()) {
-      return sfs::path{};
+      return bfs::path{};
     }
 
     ofs << data;
 
     return path;
 
-  } catch (const sfs::filesystem_error&) {
+  } catch (const bfs::filesystem_error&) {
-    return sfs::path{};
+    return bfs::path{};
   }
 }
 
@@ -356,8 +357,8 @@ TEST(ClientTest, Post_FileBody) {
   }
 
   // Remove the temp file.
-  std::error_code ec;
+  boost::system::error_code ec;
-  sfs::remove(path, ec);
+  bfs::remove(path, ec);
 }
 
 #if WEBCC_ENABLE_GZIP

autotest/main.cc

@@ -1,5 +1,3 @@
-#include <filesystem>
-
 #include "gtest/gtest.h"
 
 #include "webcc/logger.h"

doc/Build-Instructions.md

@@ -2,7 +2,7 @@
 
 ## Dependencies
 
-* [Boost 1.66+](https://www.boost.org/) (asio, system, date_time)
+* [Boost 1.66+](https://www.boost.org/) (asio, system, date_time, filesystem)
 * [OpenSSL](https://www.openssl.org/) (for HTTPS, optional)
 * [Zlib](https://www.zlib.net/) (for GZIP compression, optional)
 * [Googletest/gtest](https://github.com/google/googletest) (for automation and unit tests, optional)

doc/Build-on-Linux.md

@@ -2,8 +2,6 @@
 
 _For Ubuntu based Linux distributions._
 
-_NOTE: The usage of C++17 `filesystem` library requires GCC to be version 8 and above. It means that Webcc will not compile on Ubuntu LTS 18.04._
-
 ## Install Build Essential
 
 ```
@@ -12,9 +10,7 @@ sudo apt install build-essential
 
 ## Install CMake
 
-```
+Please refer to https://apt.kitware.com/.
-sudo apt install cmake
-```
 
 ## Install Zlib & OpenSSL
 
@@ -26,11 +22,11 @@ sudo apt install zlib1g-dev libssl-dev
 
 Download the `.tar.bz2` or `.tar.gz` from [here](https://www.boost.org/users/download/#live).
 
-Unpack and go into the directory (suppose Boost version is 1.70):
+Unpack and go into the directory (suppose Boost version is 1.74):
 
 ```
-tar -xzf boost_1_70_0.tar.bz2
+tar -xzf boost_1_74_0.tar.bz2
-cd boost_1_70_0
+cd boost_1_74_0
 ```
 
 Run `bootstrap.sh` to generate `b2`:
@@ -44,7 +40,7 @@ You can change install prefix with `--prefix` (default is `/usr/local`, need `su
 Build and install:
 
 ```
-sudo ./b2 --with-system --with-date_time variant=debug link=static threading=multi -j4 install
+sudo ./b2 --with-system --with-date_time --with-filesystem variant=debug link=static threading=multi -j4 install
 ```
 
 Notes:
@@ -91,7 +87,7 @@ cmake -G"Unix Makefiles" \
     -DWEBCC_ENABLE_GZIP=1 \
     -DWEBCC_ENABLE_AUTOTEST=OFF \
     -DWEBCC_ENABLE_UNITTEST=OFF \
-    -DWEBCC_ENABLE_EXAMPLES=OFF \
+    -DWEBCC_ENABLE_EXAMPLES=ON \
     ..
 ```
 
@@ -108,16 +104,3 @@ make -j4
 ```
 
 The number after `-j` depends on how many CPU cores you have. You can just ignore `-j` option.
-
-Install the libraries:
-
-```bash
-make install
-```
-
-If `WEBCC_ENABLE_AUTOTEST` was `ON`, you can run the automation test:
-
-```
-cd autotest
-./webcc_autotest
-```

doc/Build-on-Mac.md

@@ -12,11 +12,11 @@ Download the .dmg from [here](https://cmake.org/download/). Just double click an
 
 Download the .tar.bz2 or .tar.gz from [here](https://www.boost.org/users/download/#live).
 
-Unpack and go into the directory (suppose Boost version is 1.70):
+Unpack and go into the directory (suppose Boost version is 1.74):
 
 ```
-tar -xzf boost_1_70_0.tar.bz2
+tar -xzf boost_1_74_0.tar.bz2
-cd boost_1_70_0
+cd boost_1_74_0
 ```
 
 Run `bootstrap.sh` to generate `b2`:
@@ -30,7 +30,7 @@ You can change install prefix with `--prefix` option (default is `/usr/local`, n
 Build and install:
 
 ```
-sudo ./b2 --with-system --with-date_time variant=debug link=static threading=multi -j4 install
+sudo ./b2 --with-system --with-date_time --with-filesystem variant=debug link=static threading=multi -j4 install
 ```
 
 Notes:
@@ -53,6 +53,7 @@ The libraries are installed to `/usr/local/lib`. E.g.,
 $ ls -l /usr/local/lib/libboost*
 -rw-r--r--  1 adam  admin   540288 Apr 21 11:01 /usr/local/lib/libboost_date_time.a
 -rw-r--r--  1 root  admin     2976 Apr 21 11:01 /usr/local/lib/libboost_system.a
+...
 ```
 
 The headers are installed to `/usr/local/include/boost`.
@@ -115,33 +116,3 @@ Open Terminal, go to the build directory, run `make`. E.g.,
 $ cd github/webcc_build
 $ make -j4
 ```
-
-There might be some warnings, just ignore them.
-
-Suppose you have checked `WEBCC_ENABLE_AUTOTEST` during the configuration, you can run it now.
-
-```
-$ cd autotest
-$ ./webcc_autotest
-[==========] Running 7 tests from 1 test case.
-[----------] Global test environment set-up.
-[----------] 7 tests from ClientTest
-[ RUN      ] ClientTest.Get_RequestFunc
-[       OK ] ClientTest.Get_RequestFunc (1066 ms)
-[ RUN      ] ClientTest.Get_Shortcut
-[       OK ] ClientTest.Get_Shortcut (1844 ms)
-[ RUN      ] ClientTest.Get_SSL
-[       OK ] ClientTest.Get_SSL (2158 ms)
-[ RUN      ] ClientTest.Compression_Gzip
-[       OK ] ClientTest.Compression_Gzip (913 ms)
-[ RUN      ] ClientTest.Compression_Deflate
-[       OK ] ClientTest.Compression_Deflate (921 ms)
-[ RUN      ] ClientTest.KeepAlive
-[       OK ] ClientTest.KeepAlive (5121 ms)
-[ RUN      ] ClientTest.GetImageJpeg
-[       OK ] ClientTest.GetImageJpeg (1244 ms)
-[----------] 7 tests from ClientTest (13267 ms total)
-[----------] Global test environment tear-down
-[==========] 7 tests from 1 test case ran. (13267 ms total)
-[  PASSED  ] 7 tests.
-```

doc/Build-on-Windows.md

@@ -15,12 +15,12 @@ In the prompt, `cd` to the Boost root directory. Run `bootstrap.bat` to generate
 Run `b2.exe` to start the build:
 
 ```
-b2 --with-system --with-date_time variant=debug variant=release link=static threading=multi address-model=64 stage
+b2 --with-system --with-date_time --with-filesystem variant=debug variant=release link=static threading=multi address-model=64 stage
 ```
 
 NOTE: Given `address-model=64` `b2.exe` will not build any x86 libraries.
 
-As you can see, we only need to build `system` and `date_time` which are used by Asio. Asio itself is a header-only library.
+As you can see, we only need to build `system`, `date_time` and `filesystem`. Asio itself is a header-only library.
 
 We don't install Boost to any other place (e.g., `C:\Boost`). We just `stage` it where it is.
 

examples/book_client/book_client.cc

@@ -2,12 +2,16 @@
 
 #include <iostream>
 
+#include "boost/filesystem/operations.hpp"
+
 #include "json/json.h"
 
 #include "webcc/string.h"
 
 #include "book_json.h"
 
+namespace bfs = boost::filesystem;
+
 BookClient::BookClient(const std::string& url, int timeout)
     : url_(url), session_(timeout) {
   // Default Content-Type for requests with a body.
@@ -124,8 +128,7 @@ bool BookClient::Delete(const std::string& id) {
   }
 }
 
-bool BookClient::GetPhoto(const std::string& id,
+bool BookClient::GetPhoto(const std::string& id, const bfs::path& path) {
-                          const std::filesystem::path& path) {
   try {
     auto r = session_.Send(WEBCC_GET(url_).
                            Path("books").Path(id).Path("photo")(),
@@ -145,8 +148,7 @@ bool BookClient::GetPhoto(const std::string& id,
   }
 }
 
-bool BookClient::SetPhoto(const std::string& id,
+bool BookClient::SetPhoto(const std::string& id, const bfs::path& path) {
-                          const std::filesystem::path& path) {
   try {
     if (!CheckPhoto(path)) {
       return false;
@@ -168,13 +170,12 @@ bool BookClient::SetPhoto(const std::string& id,
   }
 }
 
-bool BookClient::CheckPhoto(const std::filesystem::path& photo) {
+bool BookClient::CheckPhoto(const bfs::path& photo) {
   if (photo.empty()) {
     return false;
   }
 
-  if (!std::filesystem::is_regular_file(photo) ||
+  if (!bfs::is_regular_file(photo) || !bfs::exists(photo)) {
-      !std::filesystem::exists(photo)) {
     return false;
   }
 

examples/book_client/book_client.h

@@ -1,10 +1,11 @@
 #ifndef BOOK_CLIENT_H_
 #define BOOK_CLIENT_H_
 
-#include <filesystem>
 #include <list>
 #include <string>
 
+#include "boost/filesystem/path.hpp"
+
 #include "json/json-forwards.h"
 
 #include "webcc/client_session.h"
@@ -28,13 +29,13 @@ public:
   bool Delete(const std::string& id);
 
   // Get photo, save to the given path.
-  bool GetPhoto(const std::string& id, const std::filesystem::path& path);
+  bool GetPhoto(const std::string& id, const boost::filesystem::path& path);
 
   // Set photo using the file of the given path.
-  bool SetPhoto(const std::string& id, const std::filesystem::path& path);
+  bool SetPhoto(const std::string& id, const boost::filesystem::path& path);
 
 private:
-  bool CheckPhoto(const std::filesystem::path& photo);
+  bool CheckPhoto(const boost::filesystem::path& photo);
 
   // Check HTTP response status.
   bool CheckStatus(webcc::ResponsePtr response, int expected_status);

examples/book_client/main.cc

@@ -1,10 +1,13 @@
-#include <filesystem>
 #include <iostream>
 
+#include "boost/filesystem/operations.hpp"
+
 #include "webcc/logger.h"
 
 #include "book_client.h"
 
+namespace bfs = boost::filesystem;
+
 // -----------------------------------------------------------------------------
 
 void PrintSeparator() {
@@ -36,9 +39,8 @@ int main(int argc, char* argv[]) {
 
   std::string url = argv[1];
 
-  std::filesystem::path photo_dir = argv[2];
+  bfs::path photo_dir = argv[2];
-  if (!std::filesystem::is_directory(photo_dir) ||
+  if (!bfs::is_directory(photo_dir) || !bfs::exists(photo_dir)) {
-      !std::filesystem::exists(photo_dir)) {
     std::cerr << "Invalid photo dir!" << std::endl;
     return 1;
   }

examples/book_server/main.cc

@@ -1,11 +1,14 @@
-#include <filesystem>
 #include <iostream>
 
+#include "boost/filesystem/operations.hpp"
+
 #include "webcc/logger.h"
 #include "webcc/server.h"
 
 #include "views.h"
 
+namespace bfs = boost::filesystem;
+
 int main(int argc, char* argv[]) {
   if (argc < 3) {
     std::cout << "usage: book_server <port> <upload_dir>" << std::endl;
@@ -18,17 +21,16 @@ int main(int argc, char* argv[]) {
 
   std::uint16_t port = static_cast<std::uint16_t>(std::atoi(argv[1]));
 
-  std::filesystem::path upload_dir = argv[2];
+  bfs::path upload_dir = argv[2];
-  if (!std::filesystem::is_directory(upload_dir) ||
+  if (!bfs::is_directory(upload_dir) || !bfs::exists(upload_dir)) {
-      !std::filesystem::exists(upload_dir)) {
     std::cerr << "Invalid upload dir!" << std::endl;
     return 1;
   }
 
   // Add a sub-dir for book photos.
-  std::filesystem::path photo_dir = upload_dir / "books";
+  bfs::path photo_dir = upload_dir / "books";
-  if (!std::filesystem::exists(photo_dir)) {
+  if (!bfs::exists(photo_dir)) {
-    std::filesystem::create_directory(photo_dir);
+    bfs::create_directory(photo_dir);
   }
 
   std::cout << "Book photos will be saved to: " << photo_dir << std::endl;

examples/book_server/views.cc

@@ -1,5 +1,7 @@
 #include "views.h"
 
+#include "boost/filesystem/operations.hpp"
+
 #include "json/json.h"
 
 #include "webcc/response_builder.h"
@@ -8,6 +10,8 @@
 #include "book_db.h"
 #include "book_json.h"
 
+namespace bfs = boost::filesystem;
+
 // -----------------------------------------------------------------------------
 
 static BookDB g_book_db;
@@ -53,7 +57,7 @@ webcc::ResponsePtr BookListView::Post(webcc::RequestPtr request) {
 
 // -----------------------------------------------------------------------------
 
-BookDetailView::BookDetailView(std::filesystem::path photo_dir)
+BookDetailView::BookDetailView(bfs::path photo_dir)
     : photo_dir_(std::move(photo_dir)) {
 }
 
@@ -121,8 +125,8 @@ webcc::ResponsePtr BookDetailView::Delete(webcc::RequestPtr request) {
 
   // Delete the photo from file system.
   if (!photo_name.empty()) {
-    std::error_code ec;
+    boost::system::error_code ec;
-    std::filesystem::remove(photo_dir_ / photo_name, ec);
+    bfs::remove(photo_dir_ / photo_name, ec);
   }
 
   return webcc::ResponseBuilder{}.OK()();
@@ -130,7 +134,7 @@ webcc::ResponsePtr BookDetailView::Delete(webcc::RequestPtr request) {
 
 // -----------------------------------------------------------------------------
 
-BookPhotoView::BookPhotoView(std::filesystem::path photo_dir)
+BookPhotoView::BookPhotoView(bfs::path photo_dir)
     : photo_dir_(std::move(photo_dir)) {
 }
 
@@ -160,8 +164,8 @@ webcc::ResponsePtr BookPhotoView::Get(webcc::RequestPtr request) {
     return webcc::ResponseBuilder{}.NotFound()();
   }
 
-  std::filesystem::path photo_path = photo_dir_ / book.photo;
+  bfs::path photo_path = photo_dir_ / book.photo;
-  if (!std::filesystem::exists(photo_path)) {
+  if (!bfs::exists(photo_path)) {
     return webcc::ResponseBuilder{}.NotFound()();
   }
 
@@ -215,8 +219,8 @@ webcc::ResponsePtr BookPhotoView::Delete(webcc::RequestPtr request) {
   }
 
   // Error handling is simplified.
-  std::error_code ec;
+  boost::system::error_code ec;
-  std::filesystem::remove(photo_dir_ / book.photo, ec);
+  bfs::remove(photo_dir_ / book.photo, ec);
 
   return webcc::ResponseBuilder{}.OK()();
 }

examples/book_server/views.h

@@ -1,7 +1,7 @@
 #ifndef VIEWS_H_
 #define VIEWS_H_
 
-#include <filesystem>
+#include "boost/filesystem/path.hpp"
 
 #include "webcc/view.h"
 
@@ -25,7 +25,7 @@ private:
 // URL: /books/{id}
 class BookDetailView : public webcc::View {
 public:
-  explicit BookDetailView(std::filesystem::path photo_dir);
+  explicit BookDetailView(boost::filesystem::path photo_dir);
 
   webcc::ResponsePtr Handle(webcc::RequestPtr request) override;
 
@@ -40,7 +40,7 @@ private:
   webcc::ResponsePtr Delete(webcc::RequestPtr request);
 
 private:
-  std::filesystem::path photo_dir_;
+  boost::filesystem::path photo_dir_;
 };
 
 // -----------------------------------------------------------------------------
@@ -48,7 +48,7 @@ private:
 // URL: /books/{id}/photo
 class BookPhotoView : public webcc::View {
 public:
-  explicit BookPhotoView(std::filesystem::path photo_dir);
+  explicit BookPhotoView(boost::filesystem::path photo_dir);
 
   webcc::ResponsePtr Handle(webcc::RequestPtr request) override;
 
@@ -68,7 +68,7 @@ private:
   webcc::ResponsePtr Delete(webcc::RequestPtr request);
 
 private:
-  std::filesystem::path photo_dir_;
+  boost::filesystem::path photo_dir_;
 };
 
 #endif  // VIEWS_H_

examples/form_client.cc

@@ -1,12 +1,13 @@
 // A client posting multipart form data.
 
-#include <filesystem>
 #include <iostream>
 
+#include "boost/filesystem/operations.hpp"
+
 #include "webcc/client_session.h"
 #include "webcc/logger.h"
 
-namespace sfs = std::filesystem;
+namespace bfs = boost::filesystem;
 
 int main(int argc, char* argv[]) {
   if (argc < 2) {
@@ -23,7 +24,7 @@ int main(int argc, char* argv[]) {
 
   WEBCC_LOG_INIT("", webcc::LOG_CONSOLE);
 
-  const sfs::path upload_dir(argv[1]);
+  const bfs::path upload_dir(argv[1]);
 
   std::string url;
   if (argc == 3) {
@@ -32,7 +33,7 @@ int main(int argc, char* argv[]) {
     url = "http://httpbin.org/post";
   }
 
-  if (!sfs::is_directory(upload_dir) || !sfs::exists(upload_dir)) {
+  if (!bfs::is_directory(upload_dir) || !bfs::exists(upload_dir)) {
     std::cerr << "Invalid upload dir!" << std::endl;
     return 1;
   }

webcc/body.cc

@@ -1,5 +1,7 @@
 #include "webcc/body.h"
 
+#include "boost/filesystem/operations.hpp"
+
 #include "webcc/logger.h"
 #include "webcc/utility.h"
 
@@ -7,6 +9,8 @@
 #include "webcc/gzip.h"
 #endif
 
+namespace bfs = boost::filesystem;
+
 namespace webcc {
 
 // -----------------------------------------------------------------------------
@@ -153,7 +157,7 @@ void FormBody::Free(std::size_t index) {
 
 // -----------------------------------------------------------------------------
 
-FileBody::FileBody(const std::filesystem::path& path, std::size_t chunk_size)
+FileBody::FileBody(const bfs::path& path, std::size_t chunk_size)
     : path_(path), chunk_size_(chunk_size), auto_delete_(false), size_(0) {
   size_ = utility::TellSize(path_);
   if (size_ == kInvalidLength) {
@@ -161,15 +165,15 @@ FileBody::FileBody(const std::filesystem::path& path, std::size_t chunk_size)
   }
 }
 
-FileBody::FileBody(const std::filesystem::path& path, bool auto_delete)
+FileBody::FileBody(const bfs::path& path, bool auto_delete)
     : path_(path), chunk_size_(0), auto_delete_(auto_delete), size_(0) {
   // Don't need to tell file size.
 }
 
 FileBody::~FileBody() {
   if (auto_delete_ && !path_.empty()) {
-    std::error_code ec;
+    boost::system::error_code ec;
-    std::filesystem::remove(path_, ec);
+    bfs::remove(path_, ec);
     if (ec) {
       LOG_ERRO("Failed to remove file (%s).", ec.message().c_str());
     }
@@ -205,7 +209,7 @@ void FileBody::Dump(std::ostream& os, const std::string& prefix) const {
   os << prefix << "<file: " << path_.string() << ">" << std::endl;
 }
 
-bool FileBody::Move(const std::filesystem::path& new_path) {
+bool FileBody::Move(const bfs::path& new_path) {
   if (path_ == new_path) {
     return false;
   }
@@ -214,8 +218,8 @@ bool FileBody::Move(const std::filesystem::path& new_path) {
     ifstream_.close();
   }
 
-  std::error_code ec;
+  boost::system::error_code ec;
-  std::filesystem::rename(path_, new_path, ec);
+  bfs::rename(path_, new_path, ec);
 
   if (ec) {
     LOG_ERRO("Failed to rename file (%s).", ec.message().c_str());

webcc/body.h

@@ -1,12 +1,14 @@
 #ifndef WEBCC_BODY_H_
 #define WEBCC_BODY_H_
 
-#include <filesystem>
 #include <fstream>
 #include <memory>
 #include <string>
 #include <utility>
 
+#include "boost/filesystem/fstream.hpp"
+#include "boost/filesystem/path.hpp"
+
 #include "webcc/common.h"
 
 namespace webcc {
@@ -152,14 +154,14 @@ private:
 class FileBody : public Body {
 public:
   // For message to be sent out.
-  FileBody(const std::filesystem::path& path, std::size_t chunk_size);
+  FileBody(const boost::filesystem::path& path, std::size_t chunk_size);
 
   // For message received.
   // No |chunk_size| is needed since you don't iterate the payload of a
   // received message.
   // If |auto_delete| is true, the file will be deleted on destructor unless it
   // is moved to another path (see Move()).
-  FileBody(const std::filesystem::path& path, bool auto_delete = false);
+  FileBody(const boost::filesystem::path& path, bool auto_delete = false);
 
   ~FileBody() override;
 
@@ -173,7 +175,7 @@ public:
 
   void Dump(std::ostream& os, const std::string& prefix) const override;
 
-  const std::filesystem::path& path() const {
+  const boost::filesystem::path& path() const {
     return path_;
   }
 
@@ -186,17 +188,17 @@ public:
   // If |new_path| resolves to an existing non-directory file, it is removed.
   // If |new_path| resolves to an existing directory, it is removed if empty
   // on ISO/IEC 9945 but is an error on Windows.
-  // See std::filesystem::rename() for more details.
+  // See boost::filesystem::rename() for more details.
-  bool Move(const std::filesystem::path& new_path);
+  bool Move(const boost::filesystem::path& new_path);
 
 private:
-  std::filesystem::path path_;
+  boost::filesystem::path path_;
   std::size_t chunk_size_;
   bool auto_delete_;
 
   std::size_t size_;  // File size in bytes
 
-  std::ifstream ifstream_;
+  boost::filesystem::ifstream ifstream_;
   std::string chunk_;
 };
 

webcc/common.cc

@@ -6,6 +6,8 @@
 #include "webcc/string.h"
 #include "webcc/utility.h"
 
+namespace bfs = boost::filesystem;
+
 namespace webcc {
 
 // -----------------------------------------------------------------------------
@@ -190,8 +192,7 @@ FormPartPtr FormPart::New(const std::string& name, std::string&& data,
   return form_part;
 }
 
-FormPartPtr FormPart::NewFile(const std::string& name,
+FormPartPtr FormPart::NewFile(const std::string& name, const bfs::path& path,
-                              const std::filesystem::path& path,
                               const std::string& media_type) {
   auto form_part = std::make_shared<FormPart>();
 

webcc/common.h

@@ -2,11 +2,12 @@
 #define WEBCC_COMMON_H_
 
 #include <cassert>
-#include <filesystem>
 #include <string>
 #include <utility>
 #include <vector>
 
+#include "boost/filesystem/path.hpp"
+
 #include "webcc/globals.h"
 
 namespace webcc {
@@ -158,7 +159,7 @@ public:
   // The file name will be extracted from path.
   // The media type, if not provided, will be inferred from file extension.
   static FormPartPtr NewFile(const std::string& name,
-                             const std::filesystem::path& path,
+                             const boost::filesystem::path& path,
                              const std::string& media_type = "");
 
   // API: SERVER
@@ -229,7 +230,7 @@ private:
   std::string name_;
 
   // The path of the file to post.
-  std::filesystem::path path_;
+  boost::filesystem::path path_;
 
   // The original local file name.
   // E.g., "baby.jpg".

webcc/logger.cc

@@ -6,7 +6,6 @@
 #include <chrono>
 #include <cstdarg>
 #include <ctime>
-#include <filesystem>
 #include <iomanip>  // for put_time
 #include <mutex>
 #include <sstream>
@@ -21,6 +20,10 @@
 #include <sys/types.h>
 #endif
 
+#include "boost/filesystem/operations.hpp"
+
+namespace bfs = boost::filesystem;
+
 namespace webcc {
 
 // -----------------------------------------------------------------------------
@@ -33,7 +36,7 @@ static const char* kLevelNames[] = {
 
 // -----------------------------------------------------------------------------
 
-static FILE* FOpen(const std::filesystem::path& path, bool overwrite) {
+static FILE* FOpen(const bfs::path& path, bool overwrite) {
 #if (defined(_WIN32) || defined(_WIN64))
   return _wfopen(path.wstring().c_str(), overwrite ? L"w+" : L"a+");
 #else
@@ -45,7 +48,7 @@ struct Logger {
   Logger() : file(nullptr), modes(0) {
   }
 
-  void Init(const std::filesystem::path& path, int _modes) {
+  void Init(const bfs::path& path, int _modes) {
     modes = _modes;
 
     // Create log file only if necessary.
@@ -153,22 +156,22 @@ static std::string GetThreadID() {
   return thread_id;
 }
 
-static std::filesystem::path InitLogPath(const std::filesystem::path& dir) {
+static bfs::path InitLogPath(const bfs::path& dir) {
   if (dir.empty()) {
-    return std::filesystem::current_path() / WEBCC_LOG_FILE_NAME;
+    return bfs::current_path() / WEBCC_LOG_FILE_NAME;
   }
 
-  if (!std::filesystem::exists(dir) || !std::filesystem::is_directory(dir)) {
+  if (!bfs::exists(dir) || !bfs::is_directory(dir)) {
-    std::error_code ec;
+    boost::system::error_code ec;
-    if (!std::filesystem::create_directories(dir, ec) || ec) {
+    if (!bfs::create_directories(dir, ec) || ec) {
-      return std::filesystem::path{};
+      return bfs::path{};
     }
   }
 
   return (dir / WEBCC_LOG_FILE_NAME);
 }
 
-void LogInit(const std::filesystem::path& dir, int modes) {
+void LogInit(const bfs::path& dir, int modes) {
   // Suppose this is called from the main thread.
   g_main_thread_id = DoGetThreadID();
 

webcc/logger.h

@@ -9,12 +9,7 @@
 #include <cstring>  // for strrchr()
 #include <string>
 
-// Avoid include <filesystem> in the header.
+#include "boost/filesystem/path.hpp"
-namespace std {
-namespace filesystem {
-class path;
-}  // namespace filesystem
-}  // namespace std
 
 // Log levels.
 // VERB is similar to DEBUG commonly used by other projects.
@@ -49,7 +44,7 @@ const int LOG_FILE_OVERWRITE = LOG_FILE | LOG_OVERWRITE;
 
 // Initialize logger.
 // If |dir| is empty, log file will be generated in current directory.
-void LogInit(const std::filesystem::path& dir, int modes);
+void LogInit(const boost::filesystem::path& dir, int modes);
 
 void Log(int level, const char* file, int line, const char* format, ...);
 

webcc/parser.cc

@@ -1,5 +1,7 @@
 #include "webcc/parser.h"
 
+#include "boost/filesystem/operations.hpp"
+
 #include "webcc/logger.h"
 #include "webcc/message.h"
 #include "webcc/string.h"
@@ -9,6 +11,8 @@
 #include "webcc/gzip.h"
 #endif
 
+namespace bfs = boost::filesystem;
+
 namespace webcc {
 
 // -----------------------------------------------------------------------------
@@ -65,7 +69,7 @@ bool StringBodyHandler::Finish() {
 
 bool FileBodyHandler::OpenFile() {
   try {
-    temp_path_ = std::filesystem::temp_directory_path();
+    temp_path_ = bfs::temp_directory_path();
 
     // Generate a random string as file name.
     // A replacement of boost::filesystem::unique_path().
@@ -74,7 +78,7 @@ bool FileBodyHandler::OpenFile() {
     LOG_VERB("Generate a temp path for streaming: %s",
              temp_path_.string().c_str());
 
-  } catch (const std::filesystem::filesystem_error&) {
+  } catch (const bfs::filesystem_error&) {
     LOG_ERRO("Failed to generate temp path for streaming.");
     return false;
   }

webcc/parser.h

@@ -1,10 +1,12 @@
 #ifndef WEBCC_PARSER_H_
 #define WEBCC_PARSER_H_
 
-#include <filesystem>
 #include <fstream>
 #include <string>
 
+#include "boost/filesystem/fstream.hpp"
+#include "boost/filesystem/path.hpp"
+
 #include "webcc/common.h"
 #include "webcc/globals.h"
 
@@ -82,8 +84,8 @@ public:
 
 private:
   std::size_t streamed_size_ = 0;
-  std::ofstream ofstream_;
+  boost::filesystem::ofstream ofstream_;
-  std::filesystem::path temp_path_;
+  boost::filesystem::path temp_path_;
 };
 
 // -----------------------------------------------------------------------------

webcc/request_builder.cc

@@ -9,6 +9,8 @@
 #include "webcc/gzip.h"
 #endif
 
+namespace bfs = boost::filesystem;
+
 namespace webcc {
 
 RequestPtr RequestBuilder::operator()() {
@@ -52,7 +54,7 @@ RequestPtr RequestBuilder::operator()() {
   return request;
 }
 
-RequestBuilder& RequestBuilder::File(const std::filesystem::path& path,
+RequestBuilder& RequestBuilder::File(const bfs::path& path,
                                      bool infer_media_type,
                                      std::size_t chunk_size) {
   body_.reset(new FileBody{ path, chunk_size });
@@ -65,7 +67,7 @@ RequestBuilder& RequestBuilder::File(const std::filesystem::path& path,
 }
 
 RequestBuilder& RequestBuilder::FormFile(const std::string& name,
-                                         const std::filesystem::path& path,
+                                         const bfs::path& path,
                                          const std::string& media_type) {
   assert(!name.empty());
   return Form(FormPart::NewFile(name, path, media_type));

webcc/request_builder.h

@@ -1,10 +1,11 @@
 #ifndef WEBCC_REQUEST_BUILDER_H_
 #define WEBCC_REQUEST_BUILDER_H_
 
-#include <filesystem>
 #include <string>
 #include <vector>
 
+#include "boost/filesystem/path.hpp"
+
 #include "webcc/request.h"
 #include "webcc/url.h"
 
@@ -135,7 +136,7 @@ public:
 
   // Use the file content as body.
   // NOTE: Error::kFileError might be thrown.
-  RequestBuilder& File(const std::filesystem::path& path,
+  RequestBuilder& File(const boost::filesystem::path& path,
                        bool infer_media_type = true,
                        std::size_t chunk_size = 1024);
 
@@ -147,7 +148,7 @@ public:
 
   // Add a form part of file.
   RequestBuilder& FormFile(const std::string& name,
-                           const std::filesystem::path& path,
+                           const boost::filesystem::path& path,
                            const std::string& media_type = "");
 
   // Add a form part of string data.

webcc/response_builder.cc

@@ -8,6 +8,8 @@
 #include "webcc/gzip.h"
 #endif
 
+namespace bfs = boost::filesystem;
+
 namespace webcc {
 
 ResponsePtr ResponseBuilder::operator()() {
@@ -43,7 +45,7 @@ ResponsePtr ResponseBuilder::operator()() {
   return response;
 }
 
-ResponseBuilder& ResponseBuilder::File(const std::filesystem::path& path,
+ResponseBuilder& ResponseBuilder::File(const bfs::path& path,
                                        bool infer_media_type,
                                        std::size_t chunk_size) {
   body_.reset(new FileBody{ path, chunk_size });

webcc/response_builder.h

@@ -4,6 +4,8 @@
 #include <string>
 #include <vector>
 
+#include "boost/filesystem/path.hpp"
+
 #include "webcc/request.h"
 #include "webcc/response.h"
 
@@ -94,7 +96,7 @@ public:
 
   // Use the file content as body.
   // NOTE: Error::kFileError might be thrown.
-  ResponseBuilder& File(const std::filesystem::path& path,
+  ResponseBuilder& File(const boost::filesystem::path& path,
                         bool infer_media_type = true,
                         std::size_t chunk_size = 1024);
 

webcc/server.cc

@@ -4,20 +4,22 @@
 #include <fstream>
 #include <utility>
 
+#include "boost/filesystem/operations.hpp"
+
 #include "webcc/body.h"
 #include "webcc/logger.h"
 #include "webcc/request.h"
 #include "webcc/response.h"
 #include "webcc/utility.h"
 
-namespace sfs = std::filesystem;
+namespace bfs = boost::filesystem;
 
 using tcp = boost::asio::ip::tcp;
 
 namespace webcc {
 
 Server::Server(boost::asio::ip::tcp protocol, std::uint16_t port,
-               const sfs::path& doc_root)
+               const bfs::path& doc_root)
     : protocol_(protocol),
       port_(port),
       doc_root_(doc_root),
@@ -302,8 +304,8 @@ bool Server::MatchViewOrStatic(const std::string& method,
 
   // Try to match a static file.
   if (method == methods::kGet && !doc_root_.empty()) {
-    sfs::path path = doc_root_ / url;
+    bfs::path path = doc_root_ / url;
-    if (!sfs::is_directory(path) && sfs::exists(path)) {
+    if (!bfs::is_directory(path) && bfs::exists(path)) {
       return true;
     }
   }
@@ -319,7 +321,7 @@ ResponsePtr Server::ServeStatic(RequestPtr request) {
     return {};
   }
 
-  sfs::path path = doc_root_ / request->url().path();
+  bfs::path path = doc_root_ / request->url().path();
 
   try {
     // NOTE: FileBody might throw Error::kFileError.

webcc/server.h

@@ -1,11 +1,12 @@
 #ifndef WEBCC_SERVER_H_
 #define WEBCC_SERVER_H_
 
-#include <filesystem>
 #include <string>
 #include <thread>
 #include <vector>
 
+#include "boost/filesystem/path.hpp"
+
 #include "boost/asio/io_context.hpp"
 #include "boost/asio/ip/tcp.hpp"
 #include "boost/asio/signal_set.hpp"
@@ -21,7 +22,7 @@ namespace webcc {
 class Server : public Router {
 public:
   Server(boost::asio::ip::tcp protocol, std::uint16_t port,
-         const std::filesystem::path& doc_root = {});
+         const boost::filesystem::path& doc_root = {});
 
   ~Server() = default;
 
@@ -101,7 +102,7 @@ private:
   std::uint16_t port_;
 
   // The directory with the static files to be served.
-  std::filesystem::path doc_root_;
+  boost::filesystem::path doc_root_;
 
   // The size of the chunk loaded into memory each time when serving a
   // static file.

webcc/utility.cc

@@ -2,15 +2,18 @@
 
 #include <algorithm>
 #include <ctime>
-#include <filesystem>
 #include <fstream>
 #include <iomanip>  // for put_time
 #include <iostream>
 #include <sstream>
 
+#include "boost/filesystem/fstream.hpp"
+
 #include "webcc/string.h"
 #include "webcc/version.h"
 
+namespace bfs = boost::filesystem;
+
 namespace webcc {
 namespace utility {
 
@@ -49,18 +52,18 @@ std::string HttpDate() {
   return std::string(buf) + " GMT";
 }
 
-std::size_t TellSize(const std::filesystem::path& path) {
+std::size_t TellSize(const bfs::path& path) {
   // Flag "ate": seek to the end of stream immediately after open.
-  std::ifstream stream{ path, std::ios::binary | std::ios::ate };
+  bfs::ifstream stream{ path, std::ios::binary | std::ios::ate };
   if (stream.fail()) {
     return kInvalidLength;
   }
   return static_cast<std::size_t>(stream.tellg());
 }
 
-bool ReadFile(const std::filesystem::path& path, std::string* output) {
+bool ReadFile(const bfs::path& path, std::string* output) {
   // Flag "ate": seek to the end of stream immediately after open.
-  std::ifstream stream{ path, std::ios::binary | std::ios::ate };
+  bfs::ifstream stream{ path, std::ios::binary | std::ios::ate };
   if (stream.fail()) {
     return false;
   }

webcc/utility.h

@@ -5,16 +5,10 @@
 #include <string>
 
 #include "boost/asio/ip/tcp.hpp"
+#include "boost/filesystem/path.hpp"
 
 #include "webcc/globals.h"
 
-// Avoid include <filesystem> in the header.
-namespace std {
-namespace filesystem {
-class path;
-}  // namespace filesystem
-}  // namespace std
-
 namespace webcc {
 namespace utility {
 
@@ -28,10 +22,10 @@ std::string HttpDate();
 
 // Tell the size in bytes of the given file.
 // Return kInvalidLength (-1) on failure.
-std::size_t TellSize(const std::filesystem::path& path);
+std::size_t TellSize(const boost::filesystem::path& path);
 
 // Read entire file into string.
-bool ReadFile(const std::filesystem::path& path, std::string* output);
+bool ReadFile(const boost::filesystem::path& path, std::string* output);
 
 // Dump the string data line by line to achieve more readability.
 // Also limit the maximum size of the data to be dumped.