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Fix: Ensure MultipartForm is properly restored to the original request #777

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Fix: Ensure MultipartForm is properly restored to the original request #777

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5 changes: 5 additions & 0 deletions mux.go
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Original file line number Diff line number Diff line change
Expand Up @@ -203,6 +203,11 @@ func (r *Router) ServeHTTP(w http.ResponseWriter, req *http.Request) {
if r.Match(req, &match) {
handler = match.Handler
if handler != nil {
// req is a shallow copy; sync MultipartForm back to the original request on exit.
defer func(originReq *http.Request) {
originReq.MultipartForm = req.MultipartForm
}(req)

// Populate context for custom handlers
if r.omitRouteFromContext {
// Only populate the match vars (if any) into the context.
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