use part body when writing to file

src/main.zig

@@ -214,8 +214,10 @@ fn uploadFile(response: *http.Response, request: http.Request) !void {
     var hzzp_buffer: [1024]u8 = undefined;
 
     while (try multipart.next(&hzzp_buffer)) |part| {
-        std.log.info("part: {}", .{part});
-    }
+        std.log.info(
+            "got part from multipart request! name='{s}' filename='{s}' content_type='{s}' length={d}",
+            .{ part.disposition.name, part.disposition.filename, part.content_type, part.body.len },
+        );
 
         var image_id_buffer: [256]u8 = undefined;
         const image_id = generateImageId(&image_id_buffer);
@@ -228,9 +230,11 @@ fn uploadFile(response: *http.Response, request: http.Request) !void {
         );
 
         const image_file = try std.fs.cwd().createFile(image_path, .{});
-    try image_file.writer().writeAll(request.body);
+        try image_file.writer().writeAll(part.body);
 
         try response.writer().writeAll(image_path);
+        return;
+    }
 }
 
 fn fetchFile(response: *http.Response, request: http.Request, filename: []const u8) !void {