diff --git a/webcc/http_message.cc b/webcc/http_message.cc
index f7cf252..17c39e1 100644
--- a/webcc/http_message.cc
+++ b/webcc/http_message.cc
@@ -19,15 +19,24 @@ const char CRLF[] = { '\r', '\n' };
 
 void HttpMessage::SetHeader(const std::string& name, const std::string& value) {
   for (HttpHeader& h : headers_) {
-    if (h.name == name) {
+    if (boost::iequals(h.name, name)) {
       h.value = value;
       return;
     }
   }
-
   headers_.push_back({ name, value });
 }
 
+void HttpMessage::SetHeader(std::string&& name, std::string&& value) {
+  for (HttpHeader& h : headers_) {
+    if (boost::iequals(h.name, name)) {
+      h.value = std::move(value);
+      return;
+    }
+  }
+  headers_.push_back({ std::move(name), std::move(value) });
+}
+
 // ATTENTION: The buffers don't hold the memory!
 std::vector<boost::asio::const_buffer> HttpMessage::ToBuffers() const {
   assert(!start_line_.empty());
diff --git a/webcc/http_message.h b/webcc/http_message.h
index c2ae305..3afcf73 100644
--- a/webcc/http_message.h
+++ b/webcc/http_message.h
@@ -36,6 +36,8 @@ class HttpMessage {
 
   void SetHeader(const std::string& name, const std::string& value);
 
+  void SetHeader(std::string&& name, std::string&& value);
+
   // E.g., "text/xml; charset=utf-8"
   void SetContentType(const std::string& content_type) {
     SetHeader(kContentType, content_type);
diff --git a/webcc/http_parser.cc b/webcc/http_parser.cc
index 12bbdac..1124740 100644
--- a/webcc/http_parser.cc
+++ b/webcc/http_parser.cc
@@ -18,7 +18,7 @@ HttpParser::HttpParser(HttpMessage* message)
 
 bool HttpParser::Parse(const char* data, std::size_t length) {
   if (header_parsed_) {
-    // Add the data to the content.
+    // Append the data to the content.
     AppendContent(data, length);
 
     if (IsContentFull()) {
@@ -29,6 +29,8 @@ bool HttpParser::Parse(const char* data, std::size_t length) {
     return true;
   }
 
+  // Continue to parse headers.
+   
   pending_data_.append(data, length);
   std::size_t off = 0;
 
@@ -53,11 +55,7 @@ bool HttpParser::Parse(const char* data, std::size_t length) {
         return false;
       }
     } else {
-      // Currently, only Content-Length is important to us.
-      // Other header fields are ignored.
-      if (!content_length_parsed_) {
-        ParseContentLength(line);
-      }
+      ParseHeader(line);
     }
 
     off = pos + 2;  // Skip CRLF.
@@ -92,28 +90,28 @@ bool HttpParser::Parse(const char* data, std::size_t length) {
   return true;
 }
 
-void HttpParser::ParseContentLength(const std::string& line) {
-  std::size_t pos = line.find(':');
-  if (pos == std::string::npos) {
-    return;
+bool HttpParser::ParseHeader(const std::string& line) {
+  std::vector<std::string> splitted;
+  boost::split(splitted, line, boost::is_any_of(":"));
+
+  if (splitted.size() != 2) {
+    return false;
   }
 
-  std::string name = line.substr(0, pos);
+  std::string& name = splitted[0];
+  std::string& value = splitted[1];
 
-  if (boost::iequals(name, kContentLength)) {
-    content_length_parsed_ = true;
-
-    ++pos;  // Skip ':'.
-    while (line[pos] == ' ') {  // Skip spaces.
-      ++pos;
-    }
+  boost::trim(name);
+  boost::trim(value);
 
-    std::string value = line.substr(pos);
+  if (!content_length_parsed_ && boost::iequals(name, kContentLength)) {
+    content_length_parsed_ = true;
 
     try {
       content_length_ = static_cast<std::size_t>(std::stoul(value));
     } catch (const std::exception&) {
       LOG_ERRO("Invalid content length: %s.", value.c_str());
+      return false;
     }
 
     LOG_INFO("Content length: %u.", content_length_);
@@ -123,9 +121,49 @@ void HttpParser::ParseContentLength(const std::string& line) {
       content_.reserve(content_length_);
     } catch (const std::exception& e) {
       LOG_ERRO("Failed to reserve content memory: %s.", e.what());
+      return false;
     }
+  } else {
+    message_->SetHeader(std::move(name), std::move(value));
   }
+
+  return true;
 }
+//
+//void HttpParser::ParseContentLength(const std::string& line) {
+//  std::size_t pos = line.find(':');
+//  if (pos == std::string::npos) {
+//    return;
+//  }
+//
+//  std::string name = line.substr(0, pos);
+//
+//  if (boost::iequals(name, kContentLength)) {
+//    content_length_parsed_ = true;
+//
+//    ++pos;  // Skip ':'.
+//    while (line[pos] == ' ') {  // Skip spaces.
+//      ++pos;
+//    }
+//
+//    std::string value = line.substr(pos);
+//
+//    try {
+//      content_length_ = static_cast<std::size_t>(std::stoul(value));
+//    } catch (const std::exception&) {
+//      LOG_ERRO("Invalid content length: %s.", value.c_str());
+//    }
+//
+//    LOG_INFO("Content length: %u.", content_length_);
+//
+//    try {
+//      // Reserve memory to avoid frequent reallocation when append.
+//      content_.reserve(content_length_);
+//    } catch (const std::exception& e) {
+//      LOG_ERRO("Failed to reserve content memory: %s.", e.what());
+//    }
+//  }
+//}
 
 void HttpParser::Finish() {
   // Move content to message.
diff --git a/webcc/http_parser.h b/webcc/http_parser.h
index 96fe392..ad75875 100644
--- a/webcc/http_parser.h
+++ b/webcc/http_parser.h
@@ -28,7 +28,9 @@ class HttpParser {
  protected:
   virtual bool ParseStartLine(const std::string& line) = 0;
 
-  void ParseContentLength(const std::string& line);
+  bool ParseHeader(const std::string& line);
+
+  //void ParseContentLength(const std::string& line);
 
   void Finish();
 
diff --git a/webcc/rest_client.cc b/webcc/rest_client.cc
index aa96ec8..545f0bc 100644
--- a/webcc/rest_client.cc
+++ b/webcc/rest_client.cc
@@ -13,9 +13,8 @@ RestClient::RestClient(const std::string& host, const std::string& port)
       error_(kNoError) {
 }
 
-bool RestClient::Request(const std::string& method,
-                         const std::string& url,
-                         const std::string& content) {
+bool RestClient::Request(const std::string& method, const std::string& url,
+                         std::string&& content) {
   response_.reset();
 
   error_ = kNoError;
@@ -28,7 +27,8 @@ bool RestClient::Request(const std::string& method,
   request.SetHost(host_, port_);
 
   if (!content.empty()) {
-    request.SetContent(content);
+    request.SetContent(std::move(content));
+    request.SetContentType(kTextJsonUtf8);
   }
 
   request.UpdateStartLine();
diff --git a/webcc/rest_client.h b/webcc/rest_client.h
index 28a9ede..db1aa8c 100644
--- a/webcc/rest_client.h
+++ b/webcc/rest_client.h
@@ -3,6 +3,7 @@
 
 #include <cassert>
 #include <string>
+#include <utility>  // for move()
 
 #include "webcc/globals.h"
 #include "webcc/http_response.h"
@@ -41,16 +42,16 @@ class RestClient {
     return Request(kHttpGet, url, "");
   }
 
-  inline bool Post(const std::string& url, const std::string& content) {
-    return Request(kHttpPost, url, content);
+  inline bool Post(const std::string& url, std::string&& content) {
+    return Request(kHttpPost, url, std::move(content));
   }
 
-  inline bool Put(const std::string& url, const std::string& content) {
-    return Request(kHttpPut, url, content);
+  inline bool Put(const std::string& url, std::string&& content) {
+    return Request(kHttpPut, url, std::move(content));
   }
 
-  inline bool Patch(const std::string& url, const std::string& content) {
-    return Request(kHttpPatch, url, content);
+  inline bool Patch(const std::string& url, std::string&& content) {
+    return Request(kHttpPatch, url, std::move(content));
   }
 
   inline bool Delete(const std::string& url) {
@@ -58,9 +59,8 @@ class RestClient {
   }
 
  private:
-  bool Request(const std::string& method,
-               const std::string& url,
-               const std::string& content);
+  bool Request(const std::string& method, const std::string& url,
+               std::string&& content);
 
   std::string host_;
   std::string port_;
diff --git a/webcc/url.cc b/webcc/url.cc
index b5bda58..b8c6a89 100644
--- a/webcc/url.cc
+++ b/webcc/url.cc
@@ -151,8 +151,7 @@ std::vector<std::string> Url::SplitPath(const std::string& path) {
 }
 
 static bool SplitKeyValue(const std::string& kv,
-                          std::string* key,
-                          std::string* value) {
+                          std::string* key, std::string* value) {
   std::size_t i = kv.find_first_of('=');
   if (i == std::string::npos || i == 0) {
     return false;