Refine the parsing of response status line; add UT for utility.

webcc/common.cc

@@ -98,7 +98,7 @@ std::vector<Header>::iterator Headers::Find(const std::string& key) {
 static bool ParseValue(const std::string& str, const std::string& expected_key,
                        std::string* value) {
   std::string key;
-  if (!Split2(str, '=', &key, value)) {
+  if (!SplitKV(str, '=', &key, value)) {
     return false;
   }
 
@@ -182,7 +182,7 @@ bool ContentDisposition::Init(const std::string& str) {
   std::string key;
   std::string value;
   for (std::size_t i = 1; i < parts.size(); ++i) {
-    if (!Split2(parts[i], '=', &key, &value)) {
+    if (!SplitKV(parts[i], '=', &key, &value)) {
       return false;
     }
 

webcc/parser.cc

@@ -138,7 +138,7 @@ bool Parser::GetNextLine(std::size_t off, std::string* line, bool erase) {
 
 bool Parser::ParseHeaderLine(const std::string& line) {
   Header header;
-  if (!Split2(line, ':', &header.first, &header.second)) {
+  if (!SplitKV(line, ':', &header.first, &header.second)) {
     LOG_ERRO("Invalid header: %s", line.c_str());
     return false;
   }

webcc/request_parser.cc

@@ -167,7 +167,7 @@ bool RequestParser::ParsePartHeaders(bool* need_more_data) {
     }
 
     Header header;
-    if (!Split2(line, ':', &header.first, &header.second)) {
+    if (!SplitKV(line, ':', &header.first, &header.second)) {
       LOG_ERRO("Invalid part header line: %s", line.c_str());
       return false;
     }

webcc/response.h

@@ -27,11 +27,19 @@ public:
     status_ = status;
   }
 
-  // Set start line according to status code.
+  const std::string& reason() const {
+    return reason_;
+  }
+
+  void set_reason(const std::string& reason) {
+    reason_ = reason;
+  }
+
   void Prepare() override;
 
 private:
-  int status_;
+  int status_;  // Status code
+  std::string reason_;  // Reason phrase
 };
 
 }  // namespace webcc

webcc/response_parser.cc

@@ -16,25 +16,56 @@ void ResponseParser::Init(Response* response) {
   response_ = response;
 }
 
-// TODO: Keep the original message.
+namespace {
+
+void SplitStartLine(const std::string& line, std::vector<std::string>* parts) {
+  const char SPACE = ' ';
+
+  std::size_t off = 0;
+  std::size_t pos = 0;
+
+  for (std::size_t i = 0; i < 2; ++i) {
+    pos = line.find(SPACE, off);
+    if (pos == std::string::npos) {
+      break;
+    }
+
+    parts->push_back(line.substr(off, pos - off));
+    off = pos + 1;
+
+    for (; off < line.size() && line[off] == SPACE; ++off) {}
+  }
+
+  if (off < line.size()) {
+    parts->push_back(line.substr(off));
+  }
+}
+
+}  // namespace
+
 bool ResponseParser::ParseStartLine(const std::string& line) {
   std::vector<std::string> parts;
-  boost::split(parts, line, boost::is_any_of(" "), boost::token_compress_on);
+  SplitStartLine(line, &parts);
 
-  if (parts.size() < 3) {
+  if (parts.size() != 3) {
     LOG_ERRO("Invalid HTTP response status line: %s", line.c_str());
     return false;
   }
 
-  std::string& status_str = parts[1];
-
-  try {
-    response_->set_status(std::stoi(status_str));
-  } catch (const std::exception&) {
-    LOG_ERRO("Invalid HTTP status code: %s", status_str.c_str());
+  if (!boost::starts_with(parts[0], "HTTP/1.")) {
+    LOG_ERRO("Invalid HTTP version: %s", parts[0].c_str());
     return false;
   }
 
+  try {
+    response_->set_status(std::stoi(parts[1]));
+  } catch (const std::exception&) {
+    LOG_ERRO("Invalid HTTP status code: %s", parts[1].c_str());
+    return false;
+  }
+
+  response_->set_reason(parts[2]);
+
   return true;
 }
 

webcc/utility.cc

@@ -15,9 +15,9 @@ std::string RandomUuid() {
   return ss.str();
 }
 
-bool Split2(const std::string& str, char token, std::string* part1,
-            std::string* part2) {
-  std::size_t pos = str.find(token);
+bool SplitKV(const std::string& str, char delimiter,
+             std::string* part1, std::string* part2) {
+  std::size_t pos = str.find(delimiter);
   if (pos == std::string::npos) {
     return false;
   }

webcc/utility.h

@@ -7,9 +7,10 @@ namespace webcc {
 
 std::string RandomUuid();
 
-// Split a string to two parts by the given token.
-bool Split2(const std::string& str, char token, std::string* part1,
-            std::string* part2);
+// Split a key-value string.
+// E.g., split "Connection: Keep-Alive".
+bool SplitKV(const std::string& str, char delimiter,
+             std::string* key, std::string* value);
 
 }  // namespace webcc