#http://packages.python.org/CouchDB/client.html
import couchdb
import urllib2
from BeautifulSoup import BeautifulSoup
import re
import hashlib
from urlparse import urljoin
import time
import os
import sys
import mimetypes
import urllib
import urlparse
import socket
#couch = couchdb.Server('http://192.168.1.148:5984/')
#couch = couchdb.Server('http://192.168.1.113:5984/')
couch = couchdb.Server('http://127.0.0.1:5984/')
def mkhash(input):
return hashlib.md5(input).hexdigest().encode("utf-8")
def canonurl(url):
r"""Return the canonical, ASCII-encoded form of a UTF-8 encoded URL, or ''
if the URL looks invalid.
>>> canonurl('\xe2\x9e\xa1.ws') # tinyarro.ws
'http://xn--hgi.ws/'
"""
# strip spaces at the ends and ensure it's prefixed with 'scheme://'
url = url.strip()
if not url:
return ''
if not urlparse.urlsplit(url).scheme:
url = 'http://' + url
# turn it into Unicode
#try:
# url = unicode(url, 'utf-8')
#except UnicodeDecodeError:
# return '' # bad UTF-8 chars in URL
# parse the URL into its components
parsed = urlparse.urlsplit(url)
scheme, netloc, path, query, fragment = parsed
# ensure scheme is a letter followed by letters, digits, and '+-.' chars
if not re.match(r'[a-z][-+.a-z0-9]*$', scheme, flags=re.I):
return ''
scheme = str(scheme)
# ensure domain and port are valid, eg: sub.domain.<1-to-6-TLD-chars>[:port]
match = re.match(r'(.+\.[a-z0-9]{1,6})(:\d{1,5})?$', netloc, flags=re.I)
if not match:
return ''
domain, port = match.groups()
netloc = domain + (port if port else '')
netloc = netloc.encode('idna')
# ensure path is valid and convert Unicode chars to %-encoded
if not path:
path = '/' # eg: 'http://google.com' -> 'http://google.com/'
path = urllib.quote(urllib.unquote(path.encode('utf-8')), safe='/;')
# ensure query is valid
query = urllib.quote(urllib.unquote(query.encode('utf-8')), safe='=&?/')
# ensure fragment is valid
fragment = urllib.quote(urllib.unquote(fragment.encode('utf-8')))
# piece it all back together, truncating it to a maximum of 4KB
url = urlparse.urlunsplit((scheme, netloc, path, query, fragment))
return url[:4096]
def fullurl(url, href):
href = href.replace(" ", "%20")
href = re.sub('#.*$', '', href)
return urljoin(url, href)
#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 getLastAttachment(docsdb, url):
hash = mkhash(url)
doc = docsdb.get(hash)
if doc != None and "_attachments" in doc.keys():
last_attachment_fname = doc["_attachments"].keys()[-1]
last_attachment = docsdb.get_attachment(doc, last_attachment_fname)
return last_attachment
else:
return None
def fetchURL(docsdb, url, fieldName, agencyID, scrape_again=True):
url = canonurl(url)
hash = mkhash(url)
req = urllib2.Request(url)
print "Fetching %s (%s)" % (url, hash)
if url.startswith("mailto") or url.startswith("javascript") or url.startswith("#") or url == None or url == "":
print >> sys.stderr, "Not a valid HTTP url"
return (None, None, None)
doc = docsdb.get(hash)
if doc == None:
doc = {'_id': hash, 'agencyID': agencyID, 'url': url, 'fieldName': fieldName, 'type': 'website'}
else:
if (('page_scraped' in doc) and ((time.time() - doc['page_scraped']) < 60 * 24 * 14) or (scrape_again == False)):
print "Uh oh, trying to scrape URL again too soon!" + hash
if (not doc.has_key('file_size') or doc["file_size"] != "0") and "_attachments" in doc.keys():
last_attachment_fname = doc["_attachments"].keys()[-1]
last_attachment = docsdb.get_attachment(doc, last_attachment_fname)
content = last_attachment.read()
mime_type = doc['mime_type']
else:
content = None
mime_type = None
return (doc['url'], mime_type, content)
req.add_header("User-Agent", "Mozilla/4.0 (compatible; Prometheus webspider; owner maxious@lambdacomplex.org)")
#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())
try:
url_handle = opener.open(req, None, 20)
doc['url'] = url_handle.geturl() # may have followed a redirect to a new url
headers = url_handle.info() # the addinfourls have the .info() too
doc['etag'] = headers.getheader("ETag")
doc['last_modified'] = headers.getheader("Last-Modified")
doc['date'] = headers.getheader("Date")
doc['page_scraped'] = time.time()
doc['web_server'] = headers.getheader("Server")
doc['via'] = headers.getheader("Via")
doc['powered_by'] = headers.getheader("X-Powered-By")
doc['file_size'] = headers.getheader("Content-Length")
content_type = headers.getheader("Content-Type")
if content_type != None:
doc['mime_type'] = content_type.split(";")[0]
else:
(type, encoding) = mimetypes.guess_type(url)
doc['mime_type'] = type
if hasattr(url_handle, 'code'):
if url_handle.code == 304:
print "the web page has not been modified" + hash
last_attachment_fname = doc["_attachments"].keys()[-1]
last_attachment = docsdb.get_attachment(doc, last_attachment_fname)
content = last_attachment
return (doc['url'], doc['mime_type'], content.read())
else:
print "new webpage loaded"
content = url_handle.read()
docsdb.save(doc)
doc = docsdb.get(hash) # need to get a _rev
docsdb.put_attachment(doc, content, str(time.time()) + "-" + os.path.basename(url), doc['mime_type'])
return (doc['url'], doc['mime_type'], content)
#store as attachment epoch-filename
except (urllib2.URLError, socket.timeout) as e:
print >> sys.stderr,"error!"
error = ""
if hasattr(e, 'reason'):
error = "error %s in downloading %s" % (str(e.reason), url)
elif hasattr(e, 'code'):
error = "error %s in downloading %s" % (e.code, url)
print >> sys.stderr, error
doc['error'] = error
docsdb.save(doc)
return (None, None, None)
def scrapeAndStore(docsdb, url, depth, fieldName, agencyID):
(url, mime_type, content) = fetchURL(docsdb, url, fieldName, agencyID)
badURLs = ["http://www.ausport.gov.au/supporting/funding/grants_and_scholarships/grant_funding_report"]
if content != None and depth > 0 and url != "http://www.ausport.gov.au/supporting/funding/grants_and_scholarships/grant_funding_report":
if mime_type == "text/html" or mime_type == "application/xhtml+xml" or mime_type == "application/xml":
# http://www.crummy.com/software/BeautifulSoup/documentation.html
soup = BeautifulSoup(content)
navIDs = soup.findAll(
id=re.compile('nav|Nav|menu|bar|left|right|sidebar|more-links|breadcrumb|footer|header'))
for nav in navIDs:
print "Removing element", nav['id']
nav.extract()
navClasses = soup.findAll(
attrs={'class': re.compile('nav|menu|bar|left|right|sidebar|more-links|breadcrumb|footer|header')})
for nav in navClasses:
print "Removing element", nav['class']
nav.extract()
links = soup.findAll('a') # soup.findAll('a', id=re.compile("^p-"))
linkurls = set([])
for link in links:
if link.has_key("href"):
if link['href'].startswith("http"):
# lets not do external links for now
# linkurls.add(link['href'])
None
if link['href'].startswith("mailto"):
# not http
None
if link['href'].startswith("javascript"):
# not http
None
else:
# remove anchors and spaces in urls
linkurls.add(fullurl(url, link['href']))
for linkurl in linkurls:
#print linkurl
scrapeAndStore(docsdb, linkurl, depth - 1, fieldName, agencyID)
# select database
agencydb = couch['disclosr-agencies']
docsdb = couch['disclosr-documents']
if __name__ == "__main__":
for row in agencydb.view('app/all'): #not recently scraped agencies view?
agency = agencydb.get(row.id)
print agency['name']
for key in agency.keys():
if key == "FOIDocumentsURL" and "status" not in agency.keys() and False:
scrapeAndStore(docsdb, agency[key], 0, key, agency['_id'])
if key == 'website' and True:
scrapeAndStore(docsdb, agency[key], 0, key, agency['_id'])
if "metadata" not in agency.keys():
agency['metadata'] = {}
agency['metadata']['lastScraped'] = time.time()
if key.endswith('URL') and False:
print key
depth = 1
if 'scrapeDepth' in agency.keys():
depth = agency['scrapeDepth']
scrapeAndStore(docsdb, agency[key], depth, key, agency['_id'])
agencydb.save(agency)