q-uploader upload file, but Content-Length is zero

[afx919]

How do I make 'Content-Length' the actual file size?
(The server needs to judge whether to read into RAM or save to file according to Content-Length. For example, if it is larger than 64K, save to file. Because the server memory is only 2G, too large files will cause the server program memory is insufficient and crash, so you need to judge whether to read memory or write files according to the situation.)

[afx919]

OPTIONS requests across domains are 0, but POST requests have length.