fix: base64 encode identity schema URLs

Previously, identity schema IDs with special characters could lead to broken URLs. This patch introduces a change where identity schema IDs are base64 encoded to address this issue. Schema IDs that are not base64 encoded will continue working.

schema/handler.go

@@ -90,7 +90,12 @@ func (h *Handler) getByID(w http.ResponseWriter, r *http.Request, ps httprouter.
 		return
 	}
 
-	s, err := ss.GetByID(ps.ByName("id"))
+	id := ps.ByName("id")
+	if dec, err := base64.RawURLEncoding.DecodeString(ps.ByName("id")); err == nil {
+		id = string(dec)
+	}
+
+	s, err := ss.GetByID(id)
 	if err != nil {
 		h.r.Writer().WriteError(w, r, errors.WithStack(herodot.ErrNotFound.WithDebugf("%+v", err)))
 		return

schema/handler_test.go

@@ -61,6 +61,11 @@ func TestHandler(t *testing.T) {
 			URL:    urlx.ParseOrPanic("file://./stub"),
 			RawURL: "file://./stub",
 		},
+		{
+			ID:     "preset://email",
+			URL:    urlx.ParseOrPanic("file://./stub/identity-2.schema.json"),
+			RawURL: "file://./stub/identity-2.schema.json",
+		},
 	}
 
 	getSchemaById := func(id string) *schema.Schema {
@@ -137,6 +142,12 @@ func TestHandler(t *testing.T) {
 		require.JSONEq(t, string(file), string(server))
 	})
 
+	t.Run("case=get encoded schema", func(t *testing.T) {
+		server := getFromTSById("cHJlc2V0Oi8vZW1haWw", http.StatusOK)
+		file := getFromFS("preset://email")
+		require.JSONEq(t, string(file), string(server))
+	})
+
 	t.Run("case=get unreachable schema", func(t *testing.T) {
 		reason := getFromTSById("unreachable", http.StatusInternalServerError)
 		require.Contains(t, string(reason), "could not be found or opened")

schema/schema.go

@@ -2,6 +2,7 @@ package schema
 
 import (
 	"context"
+	"encoding/base64"
 	"io/ioutil"
 	"net/url"
 	"strings"
@@ -100,5 +101,5 @@ type Schema struct {
 }
 
 func (s *Schema) SchemaURL(host *url.URL) *url.URL {
-	return urlx.AppendPaths(host, SchemasPath, s.ID)
+	return urlx.AppendPaths(host, SchemasPath, base64.RawURLEncoding.EncodeToString([]byte(s.ID)))
 }