gistfile1.txt

## this is my simple tornado asynchttpclient that fetches files:
## trouble is its giving damaged pdf's on downdload, im using it
## with python 3.3.2,  (with 2.7x i did not need to specify encoding
## but with python 3.3.2 i have to specify it, but still get corrupted
## file. 

from tornado import ioloop, httpclient


def get_file(url):
    http_client = httpclient.AsyncHTTPClient()
    http_client.fetch(url, callback=done)


def done(response):
    with open("filename.pdf", "w",encoding='utf-8') as f:
        f.write(response.body.decode('latin-1'))
    print ("DONE")
    ioloop.IOLoop.instance().stop()


get_file("http://samplepdf.com/sample.pdf")
ioloop.IOLoop.instance().start()


## error on opening:
#Error: PDF file is damaged - attempting to reconstruct xref table...
#Error (323441): Bad FCHECK in flate stream
#Error (74): Bad FCHECK in flate stream
#Error (323441): Bad FCHECK in flate stream
#Error (74): Bad FCHECK in flate stream
#Error (323441): Bad FCHECK in flate stream
#Error (74): Bad FCHECK in flate stream
#Error (323441): Bad FCHECK in flate stream
#Error (74): Bad FCHECK in flate stream