bool HttpRequest::ParseStartLine(const StringPiece& data, HttpMessage::ErrorCode* error) {
ErrorCode error_placeholder;
if (error == NULL)
error = &error_placeholder;
static const size_t kMinHttpMethodLength = 3;
size_t pos = data.find(' ', kMinHttpMethodLength);
if (pos == StringPiece::npos) {
*error = ERROR_START_LINE_NOT_COMPLETE;
return false;
}
StringPiece method = data.substr(0, pos);
StringTrim(&method);
m_method = GetMethodByName(method);
if (m_method == METHOD_UNKNOWN) {
*error = ERROR_METHOD_NOT_FOUND;
return false;
}
size_t prev_pos = pos + 1;
pos = data.find(' ', prev_pos);
StringPiece uri;
if (pos == StringPiece::npos) {
uri = data.substr(prev_pos);
} else {
uri = data.substr(prev_pos, pos - prev_pos);
}
StringTrim(&uri);
uri.copy_to_string(&m_uri);
if (pos != StringPiece::npos) {
StringPiece version = data.substr(pos);
StringTrim(&version);
if (!ParseVersion(version)) {
*error = ERROR_VERSION_UNSUPPORTED;
return false;
}
}
return true;
}
size_t HttpHeaders::Parse(const StringPiece& data, int* error)
{
int error_placeholder;
if (error == NULL)
error = &error_placeholder;
// Starts with empty line means empty headers.
if (StringStartsWith(data, "\n") || StringStartsWith(data, "\r\n")) {
m_headers.clear();
return (data[0] == '\r') + 1; // sizeof \n or \r\n
}
size_t end_pos;
size_t tail_size;
if ((end_pos = data.find("\r\n\r\n")) != std::string::npos) {
tail_size = 4;
} else if ((end_pos = data.find("\n\n")) != std::string::npos) {
tail_size = 2;
} else {
*error = HttpMessage::ERROR_MESSAGE_NOT_COMPLETE;
return 0;
}
std::vector<StringPiece> lines;
SplitLines(data.substr(0, end_pos + tail_size), &lines);
if (lines.empty()) {
*error = HttpMessage::ERROR_MESSAGE_NOT_COMPLETE;
return 0;
}
m_headers.clear();
// Skip the head line and the last line(empty but '\n')
for (int i = 0; i < static_cast<int>(lines.size() - 1); ++i) {
StringPiece line = lines[i];
size_t pos = line.find(':');
if (pos != StringPiece::npos) {
StringPiece name = line.substr(0, pos);
StringPiece value = line.substr(pos + 1);
StringTrim(&name);
StringTrim(&value);
// Push an empty element and modify it to avoid copy.
m_headers.push_back(std::pair<std::string, std::string>());
std::pair<std::string, std::string> &header = m_headers.back();
name.copy_to_string(&header.first);
value.copy_to_string(&header.second);
} else {
if (!lines[i].empty()) {
VLOG(3) << "Invalid http header" << lines[i] << ", ignore";
} else {
*error = HttpMessage::ERROR_FIELD_NOT_COMPLETE;
m_headers.clear();
return 0;
}
}
}
*error = HttpMessage::SUCCESS;
return end_pos + tail_size;
}
