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Chris LuandGitHub
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* webdav: answer PROPFIND child stats from the listing golang.org/x/net/webdav discards the FileInfo that Readdir returned and stats every child again, five times over, so a PROPFIND on a directory costs five sequential filer lookups per entry: 15006 lookups and 1.4s for 3000 subdirectories, 24s for 60000. Windows Explorer times out well before that. Hold the entries a listing already fetched for the lifetime of the request and serve those stats from them - 6 lookups and 0.03s for the same 3000 entries. WebDavFile.Stat has to stop dropping its request context for the held entries to be reachable. * webdav: keep the request context on the lookups a listing drives stat, Readdir and Seek reached the filer on context.Background(), so a client that walked away left the listing streaming and the lookups running. Seek also missed the entries the listing had already fetched. Write and cleanup paths keep their own context - a cancelled request must not abandon a flush half done.