add endpoint print functions

webcc/client.cc

@@ -99,6 +99,8 @@ void Client::DoConnect(RequestPtr request, const std::string& default_port) {
     port = default_port;
   }
 
+  LOG_VERB("Resolve host (%s)...", request->host().c_str());
+
   std::error_code ec;
   auto endpoints = resolver.resolve(tcp::v4(), request->host(), port, ec);
 

webcc/utility.cc

@@ -5,6 +5,7 @@
 #include <filesystem>
 #include <fstream>
 #include <iomanip>  // for put_time
+#include <iostream>
 #include <sstream>
 
 #include "webcc/string.h"
@@ -72,5 +73,21 @@ void DumpByLine(const std::string& data, std::ostream& os,
   }
 }
 
+void PrintEndpoint(std::ostream& ostream,
+                   const asio::ip::tcp::endpoint& endpoint) {
+  ostream << endpoint;
+  if (endpoint.protocol() == asio::ip::tcp::v4()) {
+    ostream << ", v4";
+  } else if (endpoint.protocol() == asio::ip::tcp::v6()) {
+    ostream << ", v6";
+  }
+}
+
+std::string EndpointToString(const asio::ip::tcp::endpoint& endpoint) {
+  std::stringstream ss;
+  PrintEndpoint(ss, endpoint);
+  return ss.str();
+}
+
 }  // namespace utility
 }  // namespace webcc

webcc/utility.h

@@ -1,8 +1,11 @@
 #ifndef WEBCC_UTILITY_H_
 #define WEBCC_UTILITY_H_
 
+#include <iosfwd>
 #include <string>
 
+#include "asio/ip/tcp.hpp"
+
 #include "webcc/globals.h"
 
 // Avoid include <filesystem> in the header.
@@ -35,6 +38,14 @@ bool ReadFile(const std::filesystem::path& path, std::string* output);
 void DumpByLine(const std::string& data, std::ostream& os,
                 const std::string& prefix);
 
+// Print TCP endpoint.
+// Usage: PrintEndpoint(std::cout, endpoint)
+void PrintEndpoint(std::ostream& ostream,
+                   const asio::ip::tcp::endpoint& endpoint);
+
+// TCP endpoint to string.
+std::string EndpointToString(const asio::ip::tcp::endpoint& endpoint);
+
 }  // namespace utility
 }  // namespace webcc