First working S3 test

.gitignore

@@ -0,0 +1,3 @@
+garage.secret
+*.swp
+seafile_recovery

s3_walker.go

@@ -6,6 +6,7 @@ import (
   "mime"
   "net/url"
   "path/filepath"
+  "strings"
 
   "github.com/minio/minio-go/v7"
   "github.com/minio/minio-go/v7/pkg/credentials"
@@ -16,6 +17,7 @@ type S3Walker struct {
   config *configCollect
   mc *minio.Client
   bucket string
+  pathPrefix string
 }
 func NewS3Walker(config *configCollect) *S3Walker {
   sw := new(S3Walker)
@@ -28,31 +30,44 @@ func NewS3Walker(config *configCollect) *S3Walker {
     log.Fatal(err)
   }
 
-  if u.Scheme != "s3" { log.Fatal("URL must be of the following form: s3://ACCESS_KEY:SECRET_KEY@ENDPOINT/BUCKET") }
+  if u.Scheme != "s3" { log.Fatal("URL must be of the following form: s3://ACCESS_KEY:SECRET_KEY@ENDPOINT/REGION/BUCKET[/PREFIX") }
 
   accessKeyID := u.User.Username()
   secretAccessKey, _ := u.User.Password()
   endpoint := u.Host
-  sw.bucket = u.Path
+  splittedPath := strings.SplitN(u.Path, "/", 4)
+  if len(splittedPath) < 3 {
+    log.Fatal("Bucket or region not found")
+  }
+  region := splittedPath[1]
+  sw.bucket = splittedPath[2]
+  if len(splittedPath) > 3 {
+    sw.pathPrefix = splittedPath[3]
+  }
+
   useSSL := true
 
   // Initialize minio client object.
   sw.mc, err = minio.New(endpoint, &minio.Options{
     Creds:  credentials.NewStaticV4(accessKeyID, secretAccessKey, ""),
     Secure: useSSL,
+    Region: region,
   })
   if err != nil {
     log.Fatal(err)
   }
 
+  //sw.mc.TraceOn(nil)
+
   return sw
 }
 func (sw* S3Walker) onDir(dn *DirNode) {
 }
 func (sw* S3Walker) onFile(fn *FileNode) {
   fn.Parse()
-  contentType := mime.TypeByExtension(filepath.Ext(fn.AbsolutePath))
-  info, err := sw.mc.PutObject(sw.ctx, sw.bucket, fn.AbsolutePath, fn, int64(fn.Elem.FileSize), minio.PutObjectOptions{ ContentType: contentType })
+  path := filepath.Join(sw.pathPrefix, fn.AbsolutePath)
+  contentType := mime.TypeByExtension(filepath.Ext(path))
+  info, err := sw.mc.PutObject(sw.ctx, sw.bucket, path, fn, int64(fn.Elem.FileSize), minio.PutObjectOptions{ ContentType: contentType })
   if err != nil {
     log.Fatalln(err)
   } else if info.Size != int64(fn.Elem.FileSize) {