With this script for Pythonista you can easily upload a picture from iOS to your own webserver.

Upload_Picture.py

import webbrowser
import clipboard
import Image, ImageFile
import datetime
import ftplib
import urllib
from io import BytesIO

today = datetime.datetime.now()
image = clipboard.get_image()
fileName = 'picture_iOS'
fileName = fileName + '_' + today.strftime("%Y-%m-%d-%H%M%S") + '.png'

urlBase = 'YOUR BASE URL'
encodedFileName = urllib.quote(fileName)

print fileName

buffer = BytesIO()
image.save(buffer, 'PNG')
buffer.seek(0)


ftp = ftplib.FTP('YOUR FTP SERVER', 'YOUR LOGIN', 'YOUR PASSWORD')
ftp.storbinary('STOR '+fileName, buffer)                        
ftp.quit()


clipboard.set(urlBase + encodedFileName)                                  

print 'Success! The link to your uploaded picture is now in your clipboard.'