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Ensure only one thread can run the update function for mobileread.

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This commit is contained in:
John Schember 2011-03-08 07:04:04 -05:00
parent 07f0209fc6
commit 4ddc69e0a6
1 changed files with 40 additions and 37 deletions
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77
src/calibre/gui2/store/mobileread_plugin.py
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@ -10,6 +10,7 @@ import difflib
import heapq
import time
from contextlib import closing
from threading import RLock
from lxml import html
@ -25,6 +26,7 @@ class MobileReadStore(StorePlugin):
def genesis(self):
self.config = DynamicConfig('store_' + self.name)
self.rlock = RLock()
def open(self, parent=None, detail_item=None, external=False):
url = 'http://www.mobileread.com/'
@ -60,45 +62,46 @@ class MobileReadStore(StorePlugin):
yield s
def update_book_list(self, timeout=10):
url = 'http://www.mobileread.com/forums/ebooks.php?do=getlist&type=html'
with self.rlock:
url = 'http://www.mobileread.com/forums/ebooks.php?do=getlist&type=html'
last_download = self.config.get(self.name + '_last_download', None)
# Don't update the book list if our cache is less than one week old.
if last_download and (time.time() - last_download) < 604800:
return
# Download the book list HTML file from MobileRead.
br = browser()
raw_data = None
with closing(br.open(url, timeout=timeout)) as f:
raw_data = f.read()
if not raw_data:
return
# Turn books listed in the HTML file into BookRef's.
books = []
try:
data = html.fromstring(raw_data)
for book_data in data.xpath('//ul/li'):
book = BookRef()
book.url = ''.join(book_data.xpath('.//a/@href'))
book.format = ''.join(book_data.xpath('.//i/text()'))
book.format = book.format.strip()
last_download = self.config.get(self.name + '_last_download', None)
# Don't update the book list if our cache is less than one week old.
if last_download and (time.time() - last_download) < 604800:
return
# Download the book list HTML file from MobileRead.
br = browser()
raw_data = None
with closing(br.open(url, timeout=timeout)) as f:
raw_data = f.read()
if not raw_data:
return
# Turn books listed in the HTML file into BookRef's.
books = []
try:
data = html.fromstring(raw_data)
for book_data in data.xpath('//ul/li'):
book = BookRef()
book.url = ''.join(book_data.xpath('.//a/@href'))
book.format = ''.join(book_data.xpath('.//i/text()'))
book.format = book.format.strip()
text = ''.join(book_data.xpath('.//a/text()'))
if ':' in text:
book.author, q, text = text.partition(':')
book.author = book.author.strip()
book.title = text.strip()
books.append(book)
except:
pass
text = ''.join(book_data.xpath('.//a/text()'))
if ':' in text:
book.author, q, text = text.partition(':')
book.author = book.author.strip()
book.title = text.strip()
books.append(book)
except:
pass
# Save the book list and it's create time.
if books:
self.config[self.name + '_last_download'] = time.time()
self.config[self.name + '_book_list'] = books
# Save the book list and it's create time.
if books:
self.config[self.name + '_last_download'] = time.time()
self.config[self.name + '_book_list'] = books
def get_book_list(self, timeout=10):
self.update_book_list(timeout=timeout)