Manage Request with shared_ptr
This is an attempt to solve a class of use-after-move bugs on the
Request objects which have popped up several times. This more clearly
identifies code which owns the Request objects and has a need to keep it
alive. Currently it's just the `Connection` (or `HTTP2Connection`)
(which needs to access Request headers while sending the response), and
the `validatePrivilege()` function (which needs to temporarily own the
Request while doing an asynchronous D-Bus call). Route handlers are
provided a non-owning `Request&` for immediate use and required to not
hold the `Request&` for future use.
Tested: Redfish validator passes (with a few unrelated fails).
Redfish URLs are sent to a browser as HTML instead of raw JSON.
Change-Id: Id581fda90b6bceddd08a5dc7ff0a04b91e7394bf
Signed-off-by: Jonathan Doman <jonathan.doman@intel.com>
Signed-off-by: Ed Tanous <ed@tanous.net>
diff --git a/redfish-core/include/query.hpp b/redfish-core/include/query.hpp
index 063f1a8..2d280cb 100644
--- a/redfish-core/include/query.hpp
+++ b/redfish-core/include/query.hpp
@@ -16,7 +16,6 @@
#include <functional>
#include <memory>
-#include <new>
#include <optional>
#include <string>
#include <string_view>
@@ -31,11 +30,10 @@
namespace redfish
{
-inline void
- afterIfMatchRequest(crow::App& app,
- const std::shared_ptr<bmcweb::AsyncResp>& asyncResp,
- crow::Request& req, const std::string& ifMatchHeader,
- const crow::Response& resIn)
+inline void afterIfMatchRequest(
+ crow::App& app, const std::shared_ptr<bmcweb::AsyncResp>& asyncResp,
+ const std::shared_ptr<crow::Request>& req, const std::string& ifMatchHeader,
+ const crow::Response& resIn)
{
std::string computedEtag = resIn.computeEtag();
BMCWEB_LOG_DEBUG("User provided if-match etag {} computed etag {}",
@@ -46,7 +44,7 @@
return;
}
// Restart the request without if-match
- req.clearHeader(boost::beast::http::field::if_match);
+ req->clearHeader(boost::beast::http::field::if_match);
BMCWEB_LOG_DEBUG("Restarting request");
app.handle(req, asyncResp);
}
@@ -84,8 +82,10 @@
boost::system::error_code ec;
// Try to GET the same resource
- crow::Request newReq(
- {boost::beast::http::verb::get, req.url().encoded_path(), 11}, ec);
+ auto getReq = std::make_shared<crow::Request>(
+ crow::Request::Body{boost::beast::http::verb::get,
+ req.url().encoded_path(), 11},
+ ec);
if (ec)
{
@@ -94,17 +94,21 @@
}
// New request has the same credentials as the old request
- newReq.session = req.session;
+ getReq->session = req.session;
// Construct a new response object to fill in, and check the hash of before
// we modify the Resource.
std::shared_ptr<bmcweb::AsyncResp> getReqAsyncResp =
std::make_shared<bmcweb::AsyncResp>();
+ // Ideally we would have a shared_ptr to the original Request which we could
+ // modify to remove the If-Match and restart it. But instead we have to make
+ // a full copy to restart it.
getReqAsyncResp->res.setCompleteRequestHandler(std::bind_front(
- afterIfMatchRequest, std::ref(app), asyncResp, req, ifMatch));
+ afterIfMatchRequest, std::ref(app), asyncResp,
+ std::make_shared<crow::Request>(req), std::move(ifMatch)));
- app.handle(newReq, getReqAsyncResp);
+ app.handle(getReq, getReqAsyncResp);
return false;
}