Explictly WriteHeader before Write to avoid superfluous response.Writ… #90
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There're some situation when
WriteHeaderwould be called afterhttpSwagger.Handlerwhich may cause warning ofhttp: superfluous response.WriteHeader call.Simply add
WriteHeaderbefore write data to response solve this problem. The underlyingwebdav.Handlerdoes the same and won't cause this problem.Reference to https://github.com/golang/go/blob/72301a9863fb43ff26e9779a086e02cf02031ceb/src/net/http/clientserver_test.go#L1551