Method ServeHTTP

http/fields.go:27–57

(w http.ResponseWriter, req *http.Request)

}

func (h *ListFieldsHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {

	// find the index to operate on
	var indexName string
	if h.IndexNameLookup != nil {
		indexName = h.IndexNameLookup(req)
	}
	if indexName == "" {
		indexName = h.defaultIndexName
	}
	index := IndexByName(indexName)
	if index == nil {
		showError(w, req, fmt.Sprintf("no such index '%s'", indexName), 404)
		return
	}

	fields, err := index.Fields()
	if err != nil {
		showError(w, req, fmt.Sprintf("error: %v", err), 500)
		return
	}

	fieldsResponse := struct {
		Fields []string `json:"fields"`
	}{
		Fields: fields,
	}

	// encode the response
	mustEncode(w, fieldsResponse)
}