Break HTTP file uploading from server side by PHP or Apache

Question

When uploading big file (>100M) to server, PHP always accept entire data POST from browser first. We cannot inject into the process of uploading.

For example, check

Answer 1

I suggest you to use some client side plugins to upload files. You could use

http://www.plupload.com/

or

https://github.com/blueimp/jQuery-File-Upload/

Both plugins have provision to check file size before uploading.

If you want to use your own scripts, check this. This may help you

        function readfile()
        {
            var files = document.getElementById("fileForUpload").files;
            var output = [];
            for (var i = 0, f; f = files[i]; i++) 
            {
                    if(f.size < 100000) // Check file size of file
                    {
                        // Your code for upload
                    }
                    else
                    {
                        alert('File size exceeds upload size limit');
                    }

            }
        }