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// _ _
// __ _____ __ ___ ___ __ _| |_ ___
// \ \ /\ / / _ \/ _` \ \ / / |/ _` | __/ _ \
// \ V V / __/ (_| |\ V /| | (_| | || __/
// \_/\_/ \___|\__,_| \_/ |_|\__,_|\__\___|
//
// Copyright © 2016 - 2024 Weaviate B.V. All rights reserved.
//
// CONTACT: [email protected]
//
package extensions
import (
"io"
"net/http"
)
type RESTHandlers struct {
ls LoaderStorer
proxy Proxy
}
func NewRESTHandlers(ls LoaderStorer, proxy Proxy) *RESTHandlers {
return &RESTHandlers{
ls: ls,
proxy: proxy,
}
}
type RESTStorageHandlers struct {
ls LoaderStorer
}
func newRESTStorageHandlers(ls LoaderStorer) *RESTStorageHandlers {
return &RESTStorageHandlers{
ls: ls,
}
}
func (h *RESTHandlers) StorageHandler() http.Handler {
return newRESTStorageHandlers(h.ls).Handler()
}
func (h *RESTStorageHandlers) Handler() http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
switch r.Method {
case http.MethodGet:
h.get(w, r)
case http.MethodPut:
h.put(w, r)
default:
w.WriteHeader(http.StatusMethodNotAllowed)
}
})
}
func (h *RESTStorageHandlers) get(w http.ResponseWriter, r *http.Request) {
if len(r.URL.String()) == 0 || h.extractConcept(r) == "" {
h.getAll(w, r)
return
}
h.getOne(w, r)
}
func (h *RESTStorageHandlers) getOne(w http.ResponseWriter, r *http.Request) {
concept := h.extractConcept(r)
if concept == "" {
w.WriteHeader(http.StatusNotFound)
return
}
res, err := h.ls.Load(concept)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte(err.Error()))
return
}
if res == nil {
w.WriteHeader(http.StatusNotFound)
return
}
w.Write(res)
}
func (h *RESTStorageHandlers) getAll(w http.ResponseWriter, r *http.Request) {
res, err := h.ls.LoadAll()
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte(err.Error()))
return
}
w.Write(res)
}
func (h *RESTStorageHandlers) put(w http.ResponseWriter, r *http.Request) {
defer r.Body.Close()
concept := h.extractConcept(r)
if len(concept) == 0 {
w.WriteHeader(http.StatusNotFound)
return
}
body, err := io.ReadAll(r.Body)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte(err.Error()))
}
err = h.ls.Store(concept, body)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte(err.Error()))
}
}
func (h *RESTStorageHandlers) extractConcept(r *http.Request) string {
// cutoff leading slash, consider the rest the concept
return r.URL.String()[1:]
}
type Storer interface {
Store(concept string, value []byte) error
}
type Loader interface {
Load(concept string) ([]byte, error)
}
type LoaderAller interface {
LoadAll() ([]byte, error)
}
type LoaderStorer interface {
Storer
Loader
LoaderAller
}
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