github.com/pf-qiu/concourse/v6@v6.7.3-0.20201207032516-1f455d73275f/atc/api/resourceserver/versionserver/causality.go (about) 1 package versionserver 2 3 import ( 4 "encoding/json" 5 "net/http" 6 "strconv" 7 8 "code.cloudfoundry.org/lager" 9 10 "github.com/pf-qiu/concourse/v6/atc/db" 11 ) 12 13 // IMPORTANT: This is not yet tested because it is not being used 14 func (s *Server) GetCausality(pipeline db.Pipeline) http.Handler { 15 return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { 16 versionID, err := strconv.Atoi(r.FormValue(":resource_version_id")) 17 if err != nil { 18 w.WriteHeader(http.StatusBadRequest) 19 return 20 } 21 22 hLog := s.logger.Session("causality", lager.Data{ 23 "version": versionID, 24 }) 25 26 causality, err := pipeline.Causality(versionID) 27 if err != nil { 28 hLog.Error("failed-to-fetch", err) 29 w.WriteHeader(http.StatusInternalServerError) 30 return 31 } 32 33 hLog.Debug("fetched", lager.Data{"length": len(causality)}) 34 35 w.Header().Set("Content-Type", "application/json") 36 37 w.WriteHeader(http.StatusOK) 38 39 _ = json.NewEncoder(w).Encode(causality) 40 }) 41 }