feat: s3 server support (#6088 close #5186)

Currently tested: List, Get, Remove

server/s3.go

@@ -0,0 +1,29 @@
+package server
+
+import (
+	"context"
+	"path"
+	"strings"
+
+	"github.com/alist-org/alist/v3/internal/conf"
+	"github.com/alist-org/alist/v3/internal/setting"
+	"github.com/alist-org/alist/v3/server/common"
+	"github.com/alist-org/alist/v3/server/s3"
+	"github.com/gin-gonic/gin"
+)
+
+func S3(g *gin.RouterGroup) {
+	if !setting.GetBool(conf.S3Enabled) {
+		g.Any("/*path", func(c *gin.Context) {
+			common.ErrorStrResp(c, "S3 server is not enabled", 403)
+		})
+		return
+	}
+	h, _ := s3.NewServer(context.Background(), []string{setting.GetStr(conf.S3AccessKeyId) + "," + setting.GetStr(conf.S3SecretAccessKey)})
+
+	g.Any("/*path", func(c *gin.Context) {
+		adjustedPath := strings.TrimPrefix(c.Request.URL.Path, path.Join(conf.URL.Path, "/s3"))
+		c.Request.URL.Path = adjustedPath
+		gin.WrapH(h)(c)
+	})
+}