// handleMasterQuery allows an app to register the master query that defines the
// domain limiting all subsequent search queries.
func (a *Handler) handleMasterQuery(w http.ResponseWriter, r *http.Request) {
if !(a.auth.AllowedAccess(r)&auth.OpAll == auth.OpAll) {
auth.SendUnauthorized(w, r)
return
}
if r.Method != http.MethodPost {
http.Error(w, "not a POST", http.StatusMethodNotAllowed)
return
}
if a.sh == nil {
http.Error(w, "app proxy has no search handler", 500)
return
}
if refresh, _ := strconv.ParseBool(r.FormValue("refresh")); refresh {
if err := a.refreshDomainBlobs(); err != nil {
if err == errRefreshSuppress {
http.Error(w, "too many refresh requests", http.StatusTooManyRequests)
} else {
http.Error(w, fmt.Sprintf("%v", err), 500)
}
return
}
w.Write([]byte("OK"))
return
}
sq := new(search.SearchQuery)
if err := sq.FromHTTP(r); err != nil {
http.Error(w, fmt.Sprintf("error reading master query: %v", err), 500)
return
}
var masterQuery search.SearchQuery = *(sq)
des := *(masterQuery.Describe)
masterQuery.Describe = &des
sr, err := a.sh.Query(sq)
if err != nil {
http.Error(w, fmt.Sprintf("error running master query: %v", err), 500)
return
}
a.masterQueryMu.Lock()
defer a.masterQueryMu.Unlock()
a.masterQuery = &masterQuery
a.domainBlobs = make(map[blob.Ref]bool, len(sr.Describe.Meta))
for _, v := range sr.Describe.Meta {
a.domainBlobs[v.BlobRef] = true
}
a.domainBlobsRefresh = time.Now()
w.Write([]byte("OK"))
}
func (a *Handler) refreshDomainBlobs() error {
a.masterQueryMu.Lock()
defer a.masterQueryMu.Unlock()
if time.Now().Before(a.domainBlobsRefresh.Add(time.Minute)) {
// suppress refresh request to no more than once per minute
return errRefreshSuppress
}
if a.masterQuery == nil {
return errors.New("no master query")
}
var sq search.SearchQuery = *(a.masterQuery)
des := *(sq.Describe)
sq.Describe = &des
sr, err := a.sh.Query(&sq)
if err != nil {
return fmt.Errorf("error running master query: %v", err)
}
a.domainBlobs = make(map[blob.Ref]bool, len(sr.Describe.Meta))
for _, v := range sr.Describe.Meta {
a.domainBlobs[v.BlobRef] = true
}
a.domainBlobsRefresh = time.Now()
return nil
}