Rework the server to remove rest_xxx classes.

webcc/server.h

@@ -7,25 +7,35 @@
 #include "boost/asio/ip/tcp.hpp"
 #include "boost/asio/signal_set.hpp"
 
-#include "webcc/globals.h"
 #include "webcc/connection.h"
 #include "webcc/connection_pool.h"
+#include "webcc/request_handler.h"
+#include "webcc/service.h"
 
 namespace webcc {
 
-class RequestHandler;
-
 // HTTP server accepts TCP connections from TCP clients.
 // NOTE: Only support IPv4.
 class Server {
 public:
-  Server(std::uint16_t port, std::size_t workers);
+  Server(std::uint16_t port, std::size_t workers,
+         const std::string& doc_root = "");
 
   virtual ~Server() = default;
 
   Server(const Server&) = delete;
   Server& operator=(const Server&) = delete;
 
+  // Bind a service to the given URL path.
+  // The URL should start with "/" and it will be treated as a regular
+  // expression if |is_regex| is true.
+  // Examples:
+  //   - "/instances"
+  //   - "/instances/(\\d+)"
+  // Binding to the same URL multiple times is allowed, but only the last one
+  // takes effect.
+  bool Bind(ServicePtr service, const std::string& url, bool is_regex);
+
   // Run the server's io_service loop.
   void Run();
 
@@ -40,7 +50,7 @@ private:
   void DoAwaitStop();
 
   // Get the handler for incoming requests.
-  virtual RequestHandler* GetRequestHandler() = 0;
+  //virtual RequestHandler* GetRequestHandler();
 
   // The io_context used to perform asynchronous operations.
   boost::asio::io_context io_context_;
@@ -51,11 +61,14 @@ private:
   // The connection pool which owns all live connections.
   ConnectionPool pool_;
 
-  // The signal_set is used to register for process termination notifications.
+  // The signals for processing termination notifications.
   boost::asio::signal_set signals_;
 
   // The number of worker threads.
   std::size_t workers_;
+
+  // The handler for incoming requests.
+  RequestHandler request_handler_;
 };
 
 }  // namespace webcc