diff --git a/webcc/globals.cc b/webcc/globals.cc
index adbceb4..7e4980b 100644
--- a/webcc/globals.cc
+++ b/webcc/globals.cc
@@ -26,6 +26,9 @@ const std::string kAppJsonUtf8 = "application/json; charset=utf-8";
 const std::string kTextXmlUtf8 = "text/xml; charset=utf-8";
 #endif  // WEBCC_ENABLE_SOAP
 
+const std::string kHttpPort   = "80";
+const std::string kHttpsPort  = "443";
+
 const std::string kHttpHead   = "HEAD";
 const std::string kHttpGet    = "GET";
 const std::string kHttpPost   = "POST";
diff --git a/webcc/globals.h b/webcc/globals.h
index 1b14106..ff63213 100644
--- a/webcc/globals.h
+++ b/webcc/globals.h
@@ -43,6 +43,10 @@ extern const std::string kAppJsonUtf8;
 extern const std::string kTextXmlUtf8;
 #endif  // WEBCC_ENABLE_SOAP
 
+// Default ports.
+extern const std::string kHttpPort;
+extern const std::string kHttpsPort;
+
 // HTTP methods (verbs) in string ("HEAD", "GET", etc.).
 // NOTE: Don't use enum to avoid converting back and forth.
 extern const std::string kHttpHead;
diff --git a/webcc/http_async_client.cc b/webcc/http_async_client.cc
index c0b6c40..774c248 100644
--- a/webcc/http_async_client.cc
+++ b/webcc/http_async_client.cc
@@ -35,12 +35,7 @@ void HttpAsyncClient::Request(std::shared_ptr<HttpRequest> request,
   request_ = request;
   response_handler_ = response_handler;
 
-  std::string port = request->port();
-  if (port.empty()) {
-    port = "80";
-  }
-
-  resolver_->async_resolve(tcp::v4(), request->host(), port,
+  resolver_->async_resolve(tcp::v4(), request->host(), request->port(kHttpPort),
                            std::bind(&HttpAsyncClient::ResolveHandler,
                                      shared_from_this(),
                                      std::placeholders::_1,
diff --git a/webcc/http_client.cc b/webcc/http_client.cc
index 5a9519a..0ffc7a2 100644
--- a/webcc/http_client.cc
+++ b/webcc/http_client.cc
@@ -75,10 +75,7 @@ Error HttpClient::Connect(const HttpRequest& request) {
 
   tcp::resolver resolver(io_context_);
 
-  std::string port = request.port();
-  if (port.empty()) {
-    port = "80";
-  }
+  std::string port = request.port(kHttpPort);
 
   boost::system::error_code ec;
   auto endpoints = resolver.resolve(tcp::v4(), request.host(), port, ec);
diff --git a/webcc/http_request.h b/webcc/http_request.h
index 7642783..c500919 100644
--- a/webcc/http_request.h
+++ b/webcc/http_request.h
@@ -22,9 +22,15 @@ class HttpRequest : public HttpMessage {
   const std::string& host() const { return host_; }
   const std::string& port() const { return port_; }
 
+  std::string port(const std::string& default_port) const {
+    return port_.empty() ? default_port : port_;
+  }
+
   // Set host name and port number.
-  // The |host| is a descriptive name or a numeric IP address. The |port| is
-  // a numeric number (e.g., "9000") and "80" will be used if it's empty.
+  // The |host| is a descriptive name (e.g., www.google.com) or a numeric IP
+  // address (127.0.0.1).
+  // The |port| is a numeric number (e.g., 9000), the default (80 for HTTP and
+  // 443 for HTTPS) will be used if it's empty.
   void SetHost(const std::string& host, const std::string& port);
 
   // Set start line according to HTTP method, URL, etc.
diff --git a/webcc/http_ssl_client.cc b/webcc/http_ssl_client.cc
index a3b7f32..9c9f8ee 100644
--- a/webcc/http_ssl_client.cc
+++ b/webcc/http_ssl_client.cc
@@ -67,10 +67,7 @@ Error HttpSslClient::Connect(const HttpRequest& request) {
 
   tcp::resolver resolver(io_context_);
 
-  std::string port = request.port();
-  if (port.empty()) {
-    port = "443";  // 443 is the default port of HTTPs.
-  }
+  std::string port = request.port(kHttpsPort);
 
   boost::system::error_code ec;
   auto endpoints = resolver.resolve(tcp::v4(), request.host(), port, ec);
diff --git a/webcc/rest_client.cc b/webcc/rest_client.cc
index e283b18..747adab 100644
--- a/webcc/rest_client.cc
+++ b/webcc/rest_client.cc
@@ -9,6 +9,13 @@ RestClient::RestClient(const std::string& host, const std::string& port)
     : host_(host), port_(port),
       timeout_seconds_(0), timed_out_(false),
       error_(kNoError) {
+  if (port_.empty()) {
+    std::size_t i = host_.find_last_of(':');
+    if (i != std::string::npos) {
+      port_ = host_.substr(i + 1);
+      host_ = host_.substr(0, i);
+    }
+  }
 }
 
 bool RestClient::Request(const std::string& method, const std::string& url,
diff --git a/webcc/rest_client.h b/webcc/rest_client.h
index db1aa8c..68dcecf 100644
--- a/webcc/rest_client.h
+++ b/webcc/rest_client.h
@@ -12,7 +12,9 @@ namespace webcc {
 
 class RestClient {
  public:
-  RestClient(const std::string& host, const std::string& port);
+  // If |port| is empty, |host| will be checked to see if it contains port or
+  // not (separated by ':').
+  RestClient(const std::string& host, const std::string& port = "");
 
   ~RestClient() = default;
 
diff --git a/webcc/soap_client.cc b/webcc/soap_client.cc
index 5a11441..ea89f3b 100644
--- a/webcc/soap_client.cc
+++ b/webcc/soap_client.cc
@@ -16,6 +16,13 @@ SoapClient::SoapClient(const std::string& host, const std::string& port)
       soapenv_ns_(kSoapEnvNamespace),
       format_raw_(true), timeout_seconds_(0), timed_out_(false),
       error_(kNoError) {
+  if (port_.empty()) {
+    std::size_t i = host_.find_last_of(':');
+    if (i != std::string::npos) {
+      port_ = host_.substr(i + 1);
+      host_ = host_.substr(0, i);
+    }
+  }
 }
 
 bool SoapClient::Request(const std::string& operation,
diff --git a/webcc/soap_client.h b/webcc/soap_client.h
index 2f1526d..d69506b 100644
--- a/webcc/soap_client.h
+++ b/webcc/soap_client.h
@@ -11,7 +11,9 @@ namespace webcc {
 
 class SoapClient {
  public:
-  SoapClient(const std::string& host, const std::string& port);
+  // If |port| is empty, |host| will be checked to see if it contains port or
+  // not (separated by ':').
+  SoapClient(const std::string& host, const std::string& port = "");
 
   ~SoapClient() = default;