icinga2/lib/remote/configfileshandler.cpp
Johannes Schmidt 82bb636d2b Use WaitGroup to wait for or abort HTTP requests
The wait group gets passed to HttpServerConnection, then down to the
HttpHandlers. For those handlers that modify the program state, the
wait group is locked so ApiListener will wait on Stop() for the
request to complete. If the request iterates over config objects,
a further check on the state of the wait group is added to abort early
and not delay program shutdown. In that case, 503 responses will be
sent to the client.

Additionally, in HttpServerConnection, no further requests than the
one already started will be allowed once the wait group is joining.
2025-06-13 14:48:15 +02:00

96 lines
3.0 KiB
C++

/* Icinga 2 | (c) 2012 Icinga GmbH | GPLv2+ */
#include "remote/configfileshandler.hpp"
#include "remote/configpackageutility.hpp"
#include "remote/httputility.hpp"
#include "remote/filterutility.hpp"
#include "base/exception.hpp"
#include "base/utility.hpp"
#include <boost/algorithm/string/join.hpp>
#include <fstream>
using namespace icinga;
REGISTER_URLHANDLER("/v1/config/files", ConfigFilesHandler);
bool ConfigFilesHandler::HandleRequest(
const WaitGroup::Ptr&,
AsioTlsStream& stream,
const ApiUser::Ptr& user,
boost::beast::http::request<boost::beast::http::string_body>& request,
const Url::Ptr& url,
boost::beast::http::response<boost::beast::http::string_body>& response,
const Dictionary::Ptr& params,
boost::asio::yield_context& yc,
HttpServerConnection& server
)
{
namespace http = boost::beast::http;
if (request.method() != http::verb::get)
return false;
const std::vector<String>& urlPath = url->GetPath();
if (urlPath.size() >= 4)
params->Set("package", urlPath[3]);
if (urlPath.size() >= 5)
params->Set("stage", urlPath[4]);
if (urlPath.size() >= 6) {
std::vector<String> tmpPath(urlPath.begin() + 5, urlPath.end());
params->Set("path", boost::algorithm::join(tmpPath, "/"));
}
if (request[http::field::accept] == "application/json") {
HttpUtility::SendJsonError(response, params, 400, "Invalid Accept header. Either remove the Accept header or set it to 'application/octet-stream'.");
return true;
}
FilterUtility::CheckPermission(user, "config/query");
String packageName = HttpUtility::GetLastParameter(params, "package");
String stageName = HttpUtility::GetLastParameter(params, "stage");
if (!ConfigPackageUtility::ValidatePackageName(packageName)) {
HttpUtility::SendJsonError(response, params, 400, "Invalid package name.");
return true;
}
if (!ConfigPackageUtility::ValidateStageName(stageName)) {
HttpUtility::SendJsonError(response, params, 400, "Invalid stage name.");
return true;
}
String relativePath = HttpUtility::GetLastParameter(params, "path");
if (ConfigPackageUtility::ContainsDotDot(relativePath)) {
HttpUtility::SendJsonError(response, params, 400, "Path contains '..' (not allowed).");
return true;
}
String path = ConfigPackageUtility::GetPackageDir() + "/" + packageName + "/" + stageName + "/" + relativePath;
if (!Utility::PathExists(path)) {
HttpUtility::SendJsonError(response, params, 404, "Path not found.");
return true;
}
try {
std::ifstream fp(path.CStr(), std::ifstream::in | std::ifstream::binary);
fp.exceptions(std::ifstream::badbit);
String content((std::istreambuf_iterator<char>(fp)), std::istreambuf_iterator<char>());
response.result(http::status::ok);
response.set(http::field::content_type, "application/octet-stream");
response.body() = content;
response.content_length(response.body().size());
} catch (const std::exception& ex) {
HttpUtility::SendJsonError(response, params, 500, "Could not read file.",
DiagnosticInformation(ex));
}
return true;
}