feat: add independent platform modules and multi-provider storage

internal/storagefixture/server.go

@@ -0,0 +1,63 @@
+// Package storagefixture supplies a bounded protocol fixture, not a cloud service.
+package storagefixture
+
+import (
+	"crypto/md5"
+	"fmt"
+	"io"
+	"net/http"
+	"sync"
+	"time"
+)
+
+type value struct {
+	data        []byte
+	contentType string
+	etag        string
+}
+
+func Handler() http.Handler {
+	var mu sync.Mutex
+	values := map[string]value{}
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		mu.Lock()
+		defer mu.Unlock()
+		if r.Header.Get("Authorization") == "" && r.URL.Query().Get("X-Amz-Signature") == "" && r.URL.Query().Get("x-oss-signature") == "" {
+			http.Error(w, "signature required", 403)
+			return
+		}
+		key := r.URL.Path
+		switch r.Method {
+		case "PUT":
+			data, err := io.ReadAll(io.LimitReader(r.Body, 1025))
+			if err != nil || len(data) > 1024 {
+				http.Error(w, "too large", 413)
+				return
+			}
+			v := value{data: data, contentType: r.Header.Get("Content-Type"), etag: fmt.Sprintf("%x", md5.Sum(data))}
+			values[key] = v
+			w.Header().Set("ETag", `"`+v.etag+`"`)
+			w.WriteHeader(200)
+		case "DELETE":
+			delete(values, key)
+			w.WriteHeader(204)
+		case "GET", "HEAD":
+			v, ok := values[key]
+			if !ok {
+				w.Header().Set("Content-Type", "application/xml")
+				w.WriteHeader(404)
+				fmt.Fprint(w, `<Error><Code>NoSuchKey</Code><Message>not found</Message></Error>`)
+				return
+			}
+			w.Header().Set("Content-Length", fmt.Sprint(len(v.data)))
+			w.Header().Set("Content-Type", v.contentType)
+			w.Header().Set("ETag", `"`+v.etag+`"`)
+			w.Header().Set("Last-Modified", time.Now().UTC().Format(http.TimeFormat))
+			if r.Method == "GET" {
+				w.Write(v.data)
+			}
+		default:
+			http.Error(w, "unsupported", 405)
+		}
+	})
+}