Issue 5569 - add the possibility to use synchronous WebRequest and base path in File System

src/DefaultFileSystem.cpp

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-present eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 50 matching lines @@
 #else
   // POSIX systems: assume that file system encoding is UTF-8 and just use the
   // file paths as they are.
   std::string NormalizePath(const std::string& path)
   {
     return path;
   }
 #endif
 }
 
+DefaultFileSystemSync::DefaultFileSystemSync(const std::string& path)
+  : basePath(path)
+{
+  if (!basePath.empty() && *basePath.rbegin() == PATH_SEPARATOR)
+  {
+    basePath.resize(basePath.size() - 1);
+  }
+}
+
 IFileSystem::IOBuffer
 DefaultFileSystemSync::Read(const std::string& path) const
 {
   std::ifstream file(NormalizePath(path).c_str(), std::ios_base::binary);
   if (file.fail())
     throw RuntimeErrorWithErrno("Failed to open " + path);
 
   file.seekg(0, std::ios_base::end);
   auto dataSize = file.tellg();
   file.seekg(0, std::ios_base::beg);
@@ skipping 95 matching lines @@
     {
       return basePath + PATH_SEPARATOR + path;
     }
     else
     {
       return path;
     }
   }
 }
 
-void DefaultFileSystemSync::SetBasePath(const std::string& path)
-{
-  basePath = path;
-
-  if (*basePath.rbegin() == PATH_SEPARATOR)
-  {
-    basePath.resize(basePath.size() - 1);
-  }
-}
-
 DefaultFileSystem::DefaultFileSystem(const Scheduler& scheduler, std::unique_ptr<DefaultFileSystemSync> syncImpl)
   : scheduler(scheduler), syncImpl(std::move(syncImpl))
 {
 }
 
 void DefaultFileSystem::Read(const std::string& fileName,
                              const ReadCallback& callback) const
 {
   scheduler([this, fileName, callback]
   {
@@ skipping 105 matching lines @@
       error = "Unknown error while calling stat on " + fileName + " as " + Resolve(fileName);
     }
     callback(StatResult(), error);
   });
 }
 
 std::string DefaultFileSystem::Resolve(const std::string& fileName) const
 {
   return syncImpl->Resolve(fileName);
 }