change buffer size in order to send chunks data in ampoule

ampoule use name pipe to communicate among processes. There is a limit about 4096 bytes

 

on windows. We can't send any data which has a length over 4000. hacking the twisted codes can solve this problem.

 

1: open twisted/internet/_pollingfile.py

 

search  FULL_BUFFER_SIZE.. the default value is 4096..change it to a bigger one...like 64*1024.

 

save it

 

2: open twisted/internet/_dumbwin32proc.py

 

move the cursor to line: 136..we can find some assignments like:

 

self.hStdoutR, hStdoutW = win32pipe.CreatePipe(sAttrs, 0)

self.hStderrR, hStderrW = win32pipe.CreatePipe(sAttrs, 0)

hStdinR,  self.hStdinW  = win32pipe.CreatePipe(sAttrs, 0)

 

replace them by:

 

self.hStdoutR, hStdoutW = win32pipe.CreatePipe(sAttrs, _pollingfile.FULL_BUFFER_SIZE)

self.hStderrR, hStderrW = win32pipe.CreatePipe(sAttrs, _pollingfile.FULL_BUFFER_SIZE)

hStdinR,  self.hStdinW  = win32pipe.CreatePipe(sAttrs, _pollingfile.FULL_BUFFER_SIZE)

 

save the file...all done

 

now...ampoule can send some 60K chunks.

from:

http://mathgl.iteye.com/blog/1290580