Config.hpp

chronolaw · chronolaw · commit 07de8a5d24fd · 2020-04-10T16:40:27.000+08:00
diff --git a/section5/Config.hpp b/section5/Config.hpp
@@ -21,8 +21,10 @@ class Config final
     using vm_type           = std::shared_ptr<lua_State>;
     using value_type        = luabridge::LuaRef;
 
-    //using string_type       = std::string;
+    using string_type       = std::string;
     using string_view_type  = const std::string&;
+    using regex_type        = std::regex;
+    using match_type        = std::smatch;
 public:
     Config() noexcept
     {
@@ -37,17 +39,28 @@ class Config final
     {
         auto status = luaL_dofile(m_vm.get(), filename.c_str());
 
-        if (!status) {
+        if (status != 0) {
             throw std::runtime_error("failed to parse config");
         }
     }
 
-    value_type get(string_view_type key) const
+    value_type get(string_view_type key)
     {
-        return luabridge::getGlobal(m_vm.get(), key.c_str());
+        if (!std::regex_match(key, m_what, m_conf_reg)) {
+            throw std::runtime_error("config key error");
+        }
+
+        auto w1 = m_what[1].str();
+        auto w2 = m_what[2].str();
+
+        return luabridge::getGlobal(
+                    m_vm.get(), w1.c_str())[w2];
     }
 private:
     vm_type     m_vm {luaL_newstate(), lua_close};
+
+    regex_type  m_conf_reg {R"(^(\w+)\.(\w+)$)"};
+    match_type  m_what;
 };
 
 END_NAMESPACE(cpp_study)
diff --git a/section5/conf.lua b/section5/conf.lua
@@ -21,3 +21,7 @@ config = {
     time_interval = 1,
 
 }
+
+-- debug: luajit conf.lua
+
+--print(config.http_addr)
diff --git a/section5/cpplang.hpp b/section5/cpplang.hpp
@@ -14,6 +14,7 @@
 #include <unordered_set>
 #include <unordered_map>
 #include <algorithm>
+#include <regex>
 
 #include <atomic>
 #include <future>
diff --git a/section5/srv.cpp b/section5/srv.cpp
@@ -33,6 +33,7 @@ auto debug_print = [](auto& b)
 };
 
 int main()
+try
 {
     cout << "hello cpp_study server" << endl;
 
@@ -85,7 +86,16 @@ int main()
         }
     };
 
-    auto fu = std::async(cycle, "tcp://127.0.0.1:5555");
+    Config conf;
+    conf.load("./conf.lua");
+
+    string listen_addr = conf.get("config.zmq_ipc_addr");
+
+    auto fu = std::async(cycle, listen_addr);
 
     fu.wait();
 }
+catch(std::exception& e)
+{
+    std::cerr << e.what() << std::endl;
+}

Original file line number	Diff line number	Diff line change
`@@ -21,3 +21,7 @@ config = {`
`21`	`21`	`time_interval = 1,`
`22`	`22`
`23`	`23`	`}`
	`24`	`+`
	`25`	`+-- debug: luajit conf.lua`
	`26`	`+`
	`27`	`+--print(config.http_addr)`