1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 | #http://packages.python.org/CouchDB/client.html import couchdb import urllib2 from BeautifulSoup import BeautifulSoup import re import hashlib #http://diveintopython.org/http_web_services/etags.html class NotModifiedHandler(urllib2.BaseHandler): def http_error_304(self, req, fp, code, message, headers): addinfourl = urllib2.addinfourl(fp, headers, req.get_full_url()) addinfourl.code = code return addinfourl def scrapeAndStore(docsdb, url, depth, agencyID): hash = hashlib.md5(url).hexdigest() req = urllib2.Request(url) print "Fetching %s", url doc = docsdb['hash'] #if there is a previous version stored in couchdb, load caching helper tags if doc.has_key('etag'): req.add_header("If-None-Match", doc['etag']) if doc.has_key('last_modified'): req.add_header("If-Modified-Since", doc['last_modified']) opener = urllib2.build_opener(NotModifiedHandler()) url_handle = opener.open(req) headers = url_handle.info() # the addinfourls have the .info() too doc['etag'] = headers.getheader("ETag") doc['last_modified'] = headers.getheader("Last-Modified") doc['web_server'] = headers.getheader("Server") doc['file_size'] = headers.getheader("Content-Length") doc['mime_type'] = headers.getheader("Content-Type") if hasattr(url_handle, 'code'): if url_handle.code == 304: print "the web page has not been modified" else: #do scraping html = url_handle.read() # http://www.crummy.com/software/BeautifulSoup/documentation.html soup = BeautifulSoup(html) links = soup.findAll('a') # soup.findAll('a', id=re.compile("^p-")) for link in links: if link.has_key("href"): print link['href'] #for each unique link #if html mimetype # go down X levels, # diff with last stored attachment, store in document #if not # remember to save parentURL and title (link text that lead to document) #store as attachment epoch-filename else: print "error %s in downloading %s", url_handle.code, URL #record/alert error to error database couch = couchdb.Server('http://192.168.1.148:5984/') # select database agencydb = couch['disclosr-agencies'] docsdb = couch['disclosr-documents'] for row in agencydb.view('app/getScrapeRequired'): #not recently scraped agencies view? agency = agencydb.get(row.id) print agency['name'] scrapeAndStore(docsdb, agency['website'],1,agency['_id']) |