rstudio/src/cpp/server/ServerOffline.cpp at main · ssh352/rstudio · GitHub

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* ServerOffline.cpp

* Unless you have received this program directly from Posit Software pursuant

* to the terms of a commercial license agreement with Posit Software, then

* this program is licensed to you under the terms of version 3 of the

* GNU Affero General Public License. This program is distributed WITHOUT

* ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING THOSE OF NON-INFRINGEMENT,

* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Please refer to the

* AGPL (http://www.gnu.org/licenses/agpl-3.0.txt) for more details.

#include "ServerOffline.hpp"

#include <shared_core/Error.hpp>

#include <core/gwt/GwtFileHandler.hpp>

#include <core/http/Request.hpp>

#include <core/http/Response.hpp>

#include <core/json/JsonRpc.hpp>

#include <core/Log.hpp>

#include <core/text/TemplateFilter.hpp>

#include <server/ServerOptions.hpp>

#include <server/ServerUriHandlers.hpp>

using namespace rstudio::core;

namespace rstudio {

namespace server {

namespace offline {

namespace {

void handleOfflineRequest(const http::Request& request,

http::Response* pResponse)

{

// send error code for json responses

if (request.acceptsContentType(json::kJsonContentType))

{

json::setJsonRpcError(Error(json::errc::ServerOffline, ERROR_LOCATION), pResponse);

}

// send error page for html responses

else if (request.acceptsContentType("text/html"))

{

std::ostringstream os;

std::map<std::string, std::string> vars;

vars["request_uri"] = string_utils::jsLiteralEscape(request.uri());

vars["base_uri"] = string_utils::jsLiteralEscape(request.baseUri(core::http::BaseUriUse::External));

FilePath offlineTemplate = FilePath(options().wwwLocalPath()).completeChildPath("offline.htm");

core::Error err = core::text::renderTemplate(offlineTemplate, vars, os);

if (err)

{

// if we cannot display the page log the error

// note: this should never happen in a proper deployment

LOG_ERROR(err);

}

else

{

std::string body = os.str();

pResponse->setContentType("text/html");

pResponse->setBodyUnencoded(body);

}

// set 503 status even if there was an error showing the page

pResponse->setNoCacheHeaders();

pResponse->setStatusCode(core::http::status::ServiceUnavailable);

}

// other content types just get a plain 503 with no content

else

{

pResponse->setStatusCode(http::status::ServiceUnavailable);

}

Error httpServerAddHandlers()

{

// alias options

Options& options = server::options();

uri_handlers::addBlocking("/images",

gwt::fileHandlerFunction(options.wwwLocalPath(),

"/"));

// default handler sends back offline page or json error as appropriate

uri_handlers::setBlockingDefault(handleOfflineRequest);

// success

return Success();

}

} // namespace offline

} // namespace server

} // namespace rstudio

rstudio/src/cpp/server/ServerOffline.cpp at main · ssh352/rstudio · GitHub

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