void FileServerRequestHandler::preprocessAdminFile(const HTTPRequest& request,const std::shared_ptr<StreamSocket>& socket)
{
Poco::Net::HTTPResponse response;
if (!LOOLWSD::AdminEnabled)
throw Poco::FileAccessDeniedException("Admin console disabled");
if (!FileServerRequestHandler::isAdminLoggedIn(request, response))
throw Poco::Net::NotAuthenticatedException("Invalid admin login");
static const std::string scriptJS("<script src=\"%s/loleaflet/" LOOLWSD_VERSION_HASH "/%s.js\"></script>");
static const std::string footerPage("<div class=\"footer navbar-fixed-bottom text-info text-center\"><strong>Key:</strong> %s <strong>Expiry Date:</strong> %s</div>");
const std::string relPath = getRequestPathname(request);
LOG_DBG("Preprocessing file: " << relPath);
std::string adminFile = *getUncompressedFile(relPath);
std::string brandJS(Poco::format(scriptJS, LOOLWSD::ServiceRoot, std::string(BRANDING)));
std::string brandFooter;
#if ENABLE_SUPPORT_KEY
const auto& config = Application::instance().config();
const std::string keyString = config.getString("support_key", "");
SupportKey key(keyString);
if (!key.verify() || key.validDaysRemaining() <= 0)
{
brandJS = Poco::format(scriptJS, std::string(BRANDING_UNSUPPORTED));
brandFooter = Poco::format(footerPage, key.data(), Poco::DateTimeFormatter::format(key.expiry(), Poco::DateTimeFormat::RFC822_FORMAT));
}
#endif
Poco::replaceInPlace(adminFile, std::string("<!--%BRANDING_JS%-->"), brandJS);
Poco::replaceInPlace(adminFile, std::string("<!--%FOOTER%-->"), brandFooter);
Poco::replaceInPlace(adminFile, std::string("%VERSION%"), std::string(LOOLWSD_VERSION_HASH));
Poco::replaceInPlace(adminFile, std::string("%SERVICE_ROOT%"), LOOLWSD::ServiceRoot);
// Ask UAs to block if they detect any XSS attempt
response.add("X-XSS-Protection", "1; mode=block");
// No referrer-policy
response.add("Referrer-Policy", "no-referrer");
response.add("X-Content-Type-Options", "nosniff");
response.set("User-Agent", HTTP_AGENT_STRING);
response.set("Date", Poco::DateTimeFormatter::format(Poco::Timestamp(), Poco::DateTimeFormat::HTTP_FORMAT));
response.setContentType("text/html");
response.setChunkedTransferEncoding(false);
std::ostringstream oss;
response.write(oss);
oss << adminFile;
socket->send(oss.str());
}
void FileServerRequestHandler::handleRequest(const HTTPRequest& request, Poco::MemoryInputStream& message,
const std::shared_ptr<StreamSocket>& socket)
{
try
{
bool noCache = false;
#if ENABLE_DEBUG
noCache = true;
#endif
Poco::Net::HTTPResponse response;
Poco::URI requestUri(request.getURI());
LOG_TRC("Fileserver request: " << requestUri.toString());
requestUri.normalize(); // avoid .'s and ..'s
std::string path(requestUri.getPath());
if (path.find("loleaflet/" LOOLWSD_VERSION_HASH "/") == std::string::npos)
{
LOG_WRN("client - server version mismatch, disabling browser cache.");
noCache = true;
}
std::vector<std::string> requestSegments;
requestUri.getPathSegments(requestSegments);
const std::string relPath = getRequestPathname(request);
// Is this a file we read at startup - if not; its not for serving.
if (requestSegments.size() < 1 || FileHash.find(relPath) == FileHash.end())
throw Poco::FileNotFoundException("Invalid URI request: [" + requestUri.toString() + "].");
const auto& config = Application::instance().config();
const std::string loleafletHtml = config.getString("loleaflet_html", "loleaflet.html");
const std::string endPoint = requestSegments[requestSegments.size() - 1];
if (endPoint == loleafletHtml)
{
preprocessFile(request, message, socket);
return;
}
if (request.getMethod() == HTTPRequest::HTTP_GET)
{
if (endPoint == "admin.html" ||
endPoint == "adminSettings.html" ||
endPoint == "adminHistory.html" ||
endPoint == "adminAnalytics.html")
{
preprocessAdminFile(request, socket);
return;
}
if (endPoint == "admin-bundle.js" ||
endPoint == "admin-localizations.js")
{
noCache = true;
if (!LOOLWSD::AdminEnabled)
throw Poco::FileAccessDeniedException("Admin console disabled");
if (!FileServerRequestHandler::isAdminLoggedIn(request, response))
throw Poco::Net::NotAuthenticatedException("Invalid admin login");
// Ask UAs to block if they detect any XSS attempt
response.add("X-XSS-Protection", "1; mode=block");
// No referrer-policy
response.add("Referrer-Policy", "no-referrer");
}
// Do we have an extension.
const std::size_t extPoint = endPoint.find_last_of('.');
if (extPoint == std::string::npos)
throw Poco::FileNotFoundException("Invalid file.");
const std::string fileType = endPoint.substr(extPoint + 1);
std::string mimeType;
if (fileType == "js")
mimeType = "application/javascript";
else if (fileType == "css")
mimeType = "text/css";
else if (fileType == "html")
mimeType = "text/html";
else if (fileType == "png")
mimeType = "image/png";
else if (fileType == "svg")
mimeType = "image/svg+xml";
else
mimeType = "text/plain";
auto it = request.find("If-None-Match");
if (it != request.end())
{
// if ETags match avoid re-sending the file.
if (!noCache && it->second == "\"" LOOLWSD_VERSION_HASH "\"")
{
// TESTME: harder ... - do we even want ETag support ?
std::ostringstream oss;
Poco::DateTime now;
Poco::DateTime later(now.utcTime(), int64_t(1000)*1000 * 60 * 60 * 24 * 128);
oss << "HTTP/1.1 304 Not Modified\r\n"
<< "Date: " << Poco::DateTimeFormatter::format(
now, Poco::DateTimeFormat::HTTP_FORMAT) << "\r\n"
<< "Expires: " << Poco::DateTimeFormatter::format(
later, Poco::DateTimeFormat::HTTP_FORMAT) << "\r\n"
<< "User-Agent: " << WOPI_AGENT_STRING << "\r\n"
<< "Cache-Control: max-age=11059200\r\n"
<< "\r\n";
socket->send(oss.str());
socket->shutdown();
return;
}
}
response.set("User-Agent", HTTP_AGENT_STRING);
response.set("Date", Poco::DateTimeFormatter::format(Poco::Timestamp(), Poco::DateTimeFormat::HTTP_FORMAT));
bool gzip = request.hasToken("Accept-Encoding", "gzip");
const std::string *content;
#if ENABLE_DEBUG
if (std::getenv("LOOL_SERVE_FROM_FS"))
{
// Useful to not serve from memory sometimes especially during loleaflet development
// Avoids having to restart loolwsd everytime you make a change in loleaflet
const std::string filePath = Poco::Path(LOOLWSD::FileServerRoot, relPath).absolute().toString();
HttpHelper::sendFile(socket, filePath, mimeType, response, noCache);
return;
}
#endif
if (gzip)
{
response.set("Content-Encoding", "gzip");
content = getCompressedFile(relPath);
}
else
content = getUncompressedFile(relPath);
if (!noCache)
{
// 60 * 60 * 24 * 128 (days) = 11059200
response.set("Cache-Control", "max-age=11059200");
response.set("ETag", "\"" LOOLWSD_VERSION_HASH "\"");
}
response.setContentType(mimeType);
response.add("X-Content-Type-Options", "nosniff");
std::ostringstream oss;
response.write(oss);
const std::string header = oss.str();
LOG_TRC("#" << socket->getFD() << ": Sending " <<
(!gzip ? "un":"") << "compressed : file [" << relPath << "]: " << header);
socket->send(header);
socket->send(*content);
}
}
catch (const Poco::Net::NotAuthenticatedException& exc)
{
LOG_ERR("FileServerRequestHandler::NotAuthenticated: " << exc.displayText());
sendError(401, request, socket, "", "", "WWW-authenticate: Basic realm=\"online\"\r\n");
}
catch (const Poco::FileAccessDeniedException& exc)
{
LOG_ERR("FileServerRequestHandler: " << exc.displayText());
sendError(403, request, socket, "403 - Access denied!",
"You are unable to access");
}
catch (const Poco::FileNotFoundException& exc)
{
LOG_WRN("FileServerRequestHandler: " << exc.displayText());
sendError(404, request, socket, "404 - file not found!",
"There seems to be a problem locating");
}
}
