first esitant check is needed

packages/http/file.go

@@ -1,6 +1,10 @@
 package http
 
 import (
+	"crypto/sha256"
+	"go-socket/packages/globals"
+	"go-socket/packages/minio"
+	"io"
 	"net/http"
 
 	"go-socket/packages/convertions"
@@ -29,4 +33,41 @@ func HandleFileUpload(response http.ResponseWriter, request *http.Request) {
 		return
 	}
 
+	request.Body = http.MaxBytesReader(response, request.Body, int64(globals.MaxPostWithFileBytes))
+	multipartReader, err := request.MultipartReader()
+	if err != nil {
+		http.Error(response, "expected multipart form", 400)
+		return
+	}
+
+	for {
+		part, err := multipartReader.NextPart()
+		if err == io.EOF {
+			http.Error(response, "bad request", 400)
+			return
+		}
+
+		if part.FileName() == "" {
+			part.Close()
+			continue
+		}
+
+		if len(part.FileName()) != sha256.Size {
+			part.Close()
+			http.Error(response, "filename must be sha256 of whole file", 400)
+			return
+		}
+
+		err = minio.Upload(ctx, part.FileName(), part, -1, part.Header.Get("Content-Type"), user.Id)
+		if err != nil {
+			http.Error(response, "upload failed", http.StatusInternalServerError)
+			return
+		}
+		part.Close()
+
+		if err != nil {
+			http.Error(response, "upload failed", 500)
+			return
+		}
+	}
 }

packages/minio/minio.go

@@ -65,7 +65,7 @@ func MinInit() {
 
 }
 
-func upload(ctx context.Context, key string, body io.Reader, size int64, contentType string, uploader uuid.UUID) error {
+func Upload(ctx context.Context, key string, body io.Reader, size int64, contentType string, uploader uuid.UUID) error {
 	_, err := minClient.PutObject(ctx, globals.FileStorageBucketName, key, body, size,
 		minio.PutObjectOptions{
 			ContentType: contentType,
@@ -82,3 +82,11 @@ func getDownloadUrl(ctx context.Context, key string) (*url.URL, error) {
 	u, err := minClient.PresignedGetObject(ctx, globals.FileStorageBucketName, key, globals.FileDownloadLinkTtl, nil)
 	return u, err
 }
+
+func DoesExist(ctx context.Context, key string) bool {
+	_, err := minClient.GetObject(ctx, globals.FileStorageBucketName, key, minio.GetObjectOptions{})
+	if err != nil {
+		return false
+	}
+	return true
+}