235 lines
8.7 KiB
C++
235 lines
8.7 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
|
|
/*
|
|
* This file is part of the LibreOffice project.
|
|
*
|
|
* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
|
|
*/
|
|
|
|
#ifndef INCLUDED_LOOLPROTOCOL_HPP
|
|
#define INCLUDED_LOOLPROTOCOL_HPP
|
|
|
|
#include <cstring>
|
|
#include <map>
|
|
#include <sstream>
|
|
#include <string>
|
|
|
|
#include <Poco/Format.h>
|
|
#include <Poco/StringTokenizer.h>
|
|
|
|
#include <Poco/Net/WebSocket.h>
|
|
|
|
#define LOK_USE_UNSTABLE_API
|
|
#include <LibreOfficeKit/LibreOfficeKitEnums.h>
|
|
|
|
namespace LOOLProtocol
|
|
{
|
|
// Protocol Version Number.
|
|
// See protocol.txt.
|
|
constexpr unsigned ProtocolMajorVersionNumber = 0;
|
|
constexpr unsigned ProtocolMinorVersionNumber = 1;
|
|
|
|
inline std::string GetProtocolVersion()
|
|
{
|
|
return std::to_string(ProtocolMajorVersionNumber) + '.'
|
|
+ std::to_string(ProtocolMinorVersionNumber);
|
|
}
|
|
|
|
// Parse a string into a version tuple.
|
|
// Negative numbers for error.
|
|
std::tuple<int, int, std::string> ParseVersion(const std::string& version);
|
|
|
|
bool stringToInteger(const std::string& input, int& value);
|
|
inline
|
|
bool parseNameValuePair(const std::string& token, std::string& name, std::string& value, const char delim = '=')
|
|
{
|
|
const auto mid = token.find_first_of(delim);
|
|
if (mid != std::string::npos)
|
|
{
|
|
name = token.substr(0, mid);
|
|
value = token.substr(mid + 1);
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
inline
|
|
bool parseNameIntegerPair(const std::string& token, std::string& name, int& value, const char delim = '=')
|
|
{
|
|
std::string strValue;
|
|
return parseNameValuePair(token, name, strValue, delim) && stringToInteger(strValue, value);
|
|
}
|
|
|
|
bool getTokenInteger(const std::string& token, const std::string& name, int& value);
|
|
bool getTokenString(const std::string& token, const std::string& name, std::string& value);
|
|
bool getTokenKeyword(const std::string& token, const std::string& name, const std::map<std::string, int>& map, int& value);
|
|
|
|
bool getTokenInteger(const Poco::StringTokenizer& tokens, const std::string& name, int& value);
|
|
bool getTokenString(const Poco::StringTokenizer& tokens, const std::string& name, std::string& value);
|
|
bool getTokenKeyword(const Poco::StringTokenizer& tokens, const std::string& name, const std::map<std::string, int>& map, int& value);
|
|
|
|
bool getTokenIntegerFromMessage(const std::string& message, const std::string& name, int& value);
|
|
bool getTokenStringFromMessage(const std::string& message, const std::string& name, std::string& value);
|
|
bool getTokenKeywordFromMessage(const std::string& message, const std::string& name, const std::map<std::string, int>& map, int& value);
|
|
|
|
// Functions that parse messages. All return false if parsing fails
|
|
bool parseStatus(const std::string& message, LibreOfficeKitDocumentType& type, int& nParts, int& currentPart, int& width, int& height);
|
|
|
|
inline
|
|
std::string getDelimitedInitialSubstring(const char *message, const int length, const char delim)
|
|
{
|
|
if (message == nullptr || length <= 0)
|
|
{
|
|
return "";
|
|
}
|
|
|
|
const char *founddelim = static_cast<const char *>(std::memchr(message, delim, length));
|
|
const auto size = (founddelim == nullptr ? length : founddelim - message);
|
|
return std::string(message, size);
|
|
}
|
|
|
|
/// Returns the first token of a message.
|
|
inline
|
|
std::string getFirstToken(const char *message, const int length, const char delim)
|
|
{
|
|
return getDelimitedInitialSubstring(message, length, delim);
|
|
}
|
|
|
|
template <typename T>
|
|
std::string getFirstToken(const T& message, const char delim = ' ')
|
|
{
|
|
return getFirstToken(message.data(), message.size(), delim);
|
|
}
|
|
|
|
inline
|
|
bool matchPrefix(const std::string& prefix, const std::string& message)
|
|
{
|
|
return (message.size() >= prefix.size() &&
|
|
message.compare(0, prefix.size(), prefix) == 0);
|
|
}
|
|
|
|
inline
|
|
bool matchPrefix(const std::string& prefix, const std::vector<char>& message)
|
|
{
|
|
return (message.size() >= prefix.size() &&
|
|
prefix.compare(0, prefix.size(), message.data(), prefix.size()) == 0);
|
|
}
|
|
|
|
inline
|
|
bool matchPrefix(const std::string& prefix, const std::string& message, const bool ignoreWhitespace)
|
|
{
|
|
if (ignoreWhitespace)
|
|
{
|
|
const auto posPre = prefix.find_first_not_of(' ');
|
|
const auto posMsg = message.find_first_not_of(' ');
|
|
|
|
return matchPrefix(posPre == std::string::npos ? prefix : prefix.substr(posPre),
|
|
posMsg == std::string::npos ? message : message.substr(posMsg));
|
|
}
|
|
else
|
|
{
|
|
return matchPrefix(prefix, message);
|
|
}
|
|
}
|
|
|
|
/// Returns true if the token is a user-interaction token.
|
|
/// Currently this excludes commands sent automatically.
|
|
/// Notice that this doesn't guarantee editing activity,
|
|
/// rather just user interaction with the UI.
|
|
inline
|
|
bool tokenIndicatesUserInteraction(const std::string& token)
|
|
{
|
|
// Exclude tokens that include these keywords, such as canceltiles statusindicator.
|
|
|
|
// FIXME: This is wrong. That the token happens to contain (or not) a certain substring is
|
|
// no guarantee that it "indicates user interaction". It might be like that at the moment,
|
|
// but that is coincidental. We should check what the actual whole token is, at least, not
|
|
// look for a substring.
|
|
|
|
return (token.find("tile") == std::string::npos &&
|
|
token.find("status") == std::string::npos &&
|
|
token.find("state") == std::string::npos);
|
|
}
|
|
|
|
/// Returns the first line of a message.
|
|
inline
|
|
std::string getFirstLine(const char *message, const int length)
|
|
{
|
|
return getDelimitedInitialSubstring(message, length, '\n');
|
|
}
|
|
|
|
/// Returns the first line of any data which payload char*.
|
|
template <typename T>
|
|
std::string getFirstLine(const T& message)
|
|
{
|
|
return getFirstLine(message.data(), message.size());
|
|
}
|
|
|
|
/// Returns an abbereviation of the message (the first line, indicating truncation). We assume
|
|
/// that it adhers to the LOOL protocol, i.e. that there is always a first (or only) line that
|
|
/// is in printable UTF-8. I.e. no encoding of binary bytes is done. The format of the result is
|
|
/// not guaranteed to be stable. It is to be used for logging purposes only, not for decoding
|
|
/// protocol frames.
|
|
inline
|
|
std::string getAbbreviatedMessage(const char *message, const int length)
|
|
{
|
|
if (message == nullptr || length <= 0)
|
|
{
|
|
return "";
|
|
}
|
|
|
|
const auto firstLine = getFirstLine(message, std::min(length, 120));
|
|
|
|
// If first line is less than the length (minus newline), add ellipsis.
|
|
if (firstLine.size() < static_cast<std::string::size_type>(length) - 1)
|
|
{
|
|
return firstLine + "...";
|
|
}
|
|
|
|
return firstLine;
|
|
}
|
|
|
|
template <typename T>
|
|
std::string getAbbreviatedMessage(const T& message)
|
|
{
|
|
return getAbbreviatedMessage(message.data(), message.size());
|
|
}
|
|
|
|
// Return a string dump of a WebSocket frame: Its opcode, length, first line (if present),
|
|
// flags. For human-readable logging purposes. Format not guaranteed to be stable. Not to be
|
|
// inspected programmatically.
|
|
inline
|
|
std::string getAbbreviatedFrameDump(const char *message, const int length, const int flags)
|
|
{
|
|
std::ostringstream result;
|
|
switch (flags & Poco::Net::WebSocket::FRAME_OP_BITMASK)
|
|
{
|
|
#define CASE(x) case Poco::Net::WebSocket::FRAME_OP_##x: result << #x; break
|
|
CASE(CONT);
|
|
CASE(TEXT);
|
|
CASE(BINARY);
|
|
CASE(CLOSE);
|
|
CASE(PING);
|
|
CASE(PONG);
|
|
#undef CASE
|
|
default:
|
|
result << Poco::format("%#x", flags);
|
|
break;
|
|
}
|
|
result << " " << length << " bytes";
|
|
|
|
if (length > 0 &&
|
|
((flags & Poco::Net::WebSocket::FRAME_OP_BITMASK) == Poco::Net::WebSocket::FRAME_OP_TEXT ||
|
|
(flags & Poco::Net::WebSocket::FRAME_OP_BITMASK) == Poco::Net::WebSocket::FRAME_OP_BINARY ||
|
|
(flags & Poco::Net::WebSocket::FRAME_OP_BITMASK) == Poco::Net::WebSocket::FRAME_OP_PING ||
|
|
(flags & Poco::Net::WebSocket::FRAME_OP_BITMASK) == Poco::Net::WebSocket::FRAME_OP_PONG))
|
|
result << ": '" << getAbbreviatedMessage(message, length) << "'";
|
|
return result.str();
|
|
}
|
|
};
|
|
|
|
#endif
|
|
|
|
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|