extra files

contrib/epee/include/net/jsonrpc_protocol_handler.h

@@ -0,0 +1,167 @@
+#ifndef JSONRPC_PROTOCOL_HANDLER_H
+#define	JSONRPC_PROTOCOL_HANDLER_H
+
+#include <cstdint>
+#include <string>
+
+#include "net/net_utils_base.h"
+#include "jsonrpc_structs.h"
+#include "storages/portable_storage.h"
+#include "storages/portable_storage_template_helper.h"
+
+namespace epee
+{
+namespace net_utils
+{
+  namespace jsonrpc2
+  {
+  inline
+  std::string& make_error_resp_json(int64_t code, const std::string& message,
+                                    std::string& response_data,
+                                    const epee::serialization::storage_entry& id = nullptr)
+  {
+    epee::json_rpc::error_response rsp;
+    rsp.id = id;
+    rsp.jsonrpc = "2.0";
+    rsp.error.code = code;
+    rsp.error.message = message;
+    epee::serialization::store_t_to_json(static_cast<epee::json_rpc::error_response&>(rsp), response_data, 0, false);
+    response_data += "\n";
+    return response_data;
+  }
+
+    template<class t_connection_context>
+    struct i_jsonrpc2_server_handler
+    {
+      virtual ~i_jsonrpc2_server_handler()
+      {}
+      virtual bool handle_rpc_request(const std::string& req_data,
+                                      std::string& resp_data,
+                                      t_connection_context& conn_context) = 0;
+      virtual bool init_server_thread()
+      { return true; }
+      virtual bool deinit_server_thread()
+      { return true; }
+    };
+    
+    template<class t_connection_context>
+    struct jsonrpc2_server_config
+    {
+      i_jsonrpc2_server_handler<t_connection_context>* m_phandler;
+      critical_section m_lock;
+    };
+    
+    template<class t_connection_context = net_utils::connection_context_base>
+    class jsonrpc2_connection_handler
+    {
+    public:
+      typedef t_connection_context connection_context;
+      typedef jsonrpc2_server_config<t_connection_context> config_type;
+
+      jsonrpc2_connection_handler(i_service_endpoint* psnd_hndlr,
+                                  config_type& config,
+                                  t_connection_context& conn_context)
+        : m_psnd_hndlr(psnd_hndlr),
+          m_config(config),
+          m_conn_context(conn_context),
+          m_is_stop_handling(false)
+      {}
+      virtual ~jsonrpc2_connection_handler()
+      {}
+
+      bool release_protocol()
+      {
+        return true;
+      }
+      virtual bool thread_init()
+      {
+        return true;
+      }
+      virtual bool thread_deinit()
+      {
+        return true;
+      }
+      void handle_qued_callback()   
+      {}
+      bool after_init_connection()
+      {
+        return true;
+      }
+      virtual bool handle_recv(const void* ptr, size_t cb)
+      {
+        std::string buf((const char*)ptr, cb);
+        LOG_PRINT_L0("JSONRPC2_RECV: " << ptr << "\r\n" << buf);
+
+        bool res = handle_buff_in(buf);
+        return res;
+      }
+    private:
+      bool handle_buff_in(std::string& buf)
+      {
+        if(m_cache.size())
+          m_cache += buf;
+        else
+          m_cache.swap(buf);
+
+        m_is_stop_handling = false;
+        while (!m_is_stop_handling) {
+          std::string::size_type pos = match_end_of_request(m_cache);
+          if (std::string::npos == pos) {
+            m_is_stop_handling = true;
+            if (m_cache.size() > 4096) {
+              LOG_ERROR("jsonrpc2_connection_handler::handle_buff_in: Too long request");
+              return false;
+            }
+            break;
+          } else {
+            extract_cached_request_and_handle(pos);
+          }
+
+          if (!m_cache.size()) {
+            m_is_stop_handling = true;
+          }
+        }
+
+        return true;
+      }
+      bool extract_cached_request_and_handle(std::string::size_type pos)
+      {
+        std::string request_data(m_cache.begin(), m_cache.begin() + pos);
+        m_cache.erase(0, pos);
+        return handle_request_and_send_response(request_data);
+      }
+      bool handle_request_and_send_response(const std::string& request_data)
+      {
+        CHECK_AND_ASSERT_MES(m_config.m_phandler, false, "m_config.m_phandler is NULL!!!!");
+        std::string response_data;
+
+        LOG_PRINT_L3("JSONRPC2_REQUEST: >> \r\n" << request_data);
+        bool rpc_result = m_config.m_phandler->handle_rpc_request(request_data, response_data, m_conn_context);
+        LOG_PRINT_L3("JSONRPC2_RESPONSE: << \r\n" << response_data);
+
+        m_psnd_hndlr->do_send((void*)response_data.data(), response_data.size());
+        return rpc_result;
+      }
+      std::string::size_type match_end_of_request(const std::string& buf)
+      {
+        std::string::size_type res = buf.find("\n");
+        if(std::string::npos != res) {
+          return res + 2;
+        }
+        return res;
+      }
+
+    protected:
+      i_service_endpoint* m_psnd_hndlr;
+
+    private:
+      config_type& m_config;
+      t_connection_context& m_conn_context;
+      std::string m_cache;
+      bool m_is_stop_handling;
+    };
+  }
+}
+}
+
+#endif	/* JSONRPC_PROTOCOL_HANDLER_H */