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Use HEAD request to check for covers

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This commit is contained in:
Kovid Goyal 2010-06-27 12:36:12 -06:00
parent 1e137b7ee7
commit d814a9af84
1 changed files with 8 additions and 1 deletions
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9
src/calibre/ebooks/metadata/library_thing.py
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@ -7,6 +7,7 @@ Fetch cover from LibraryThing.com based on ISBN number.
import sys, socket, os, re
from lxml import html
import mechanize
from calibre import browser, prints
from calibre.utils.config import OptionParser
@ -14,11 +15,17 @@ from calibre.ebooks.BeautifulSoup import BeautifulSoup
OPENLIBRARY = 'http://covers.openlibrary.org/b/isbn/%s-L.jpg?default=false'
class HeadRequest(mechanize.Request):
def get_method(self):
return 'HEAD'
def check_for_cover(isbn, timeout=5.):
br = browser()
br.set_handle_redirect(False)
try:
br.open_novisit(OPENLIBRARY%isbn, timeout=timeout)
br.open_novisit(HeadRequest(OPENLIBRARY%isbn), timeout=timeout)
return True
except Exception, e:
if callable(getattr(e, 'getcode', None)) and e.getcode() == 302:
return True