#http://packages.python.org/CouchDB/client.html |
#http://packages.python.org/CouchDB/client.html |
import couchdb |
import couchdb |
import urllib2 |
import urllib2 |
from BeautifulSoup import BeautifulSoup |
from BeautifulSoup import BeautifulSoup |
import re |
import re |
import hashlib |
import hashlib |
from urlparse import urljoin |
from urlparse import urljoin |
import time |
import time |
import os |
import os |
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import mimetypes |
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import re |
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import urllib |
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import urlparse |
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def canonurl(url): |
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r"""Return the canonical, ASCII-encoded form of a UTF-8 encoded URL, or '' |
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if the URL looks invalid. |
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>>> canonurl('\xe2\x9e\xa1.ws') # tinyarro.ws |
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'http://xn--hgi.ws/' |
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""" |
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# strip spaces at the ends and ensure it's prefixed with 'scheme://' |
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url = url.strip() |
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if not url: |
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return '' |
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if not urlparse.urlsplit(url).scheme: |
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url = 'http://' + url |
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# turn it into Unicode |
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#try: |
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# url = unicode(url, 'utf-8') |
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#except UnicodeDecodeError: |
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# return '' # bad UTF-8 chars in URL |
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# parse the URL into its components |
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parsed = urlparse.urlsplit(url) |
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scheme, netloc, path, query, fragment = parsed |
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# ensure scheme is a letter followed by letters, digits, and '+-.' chars |
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if not re.match(r'[a-z][-+.a-z0-9]*$', scheme, flags=re.I): |
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return '' |
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scheme = str(scheme) |
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# ensure domain and port are valid, eg: sub.domain.<1-to-6-TLD-chars>[:port] |
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match = re.match(r'(.+\.[a-z0-9]{1,6})(:\d{1,5})?$', netloc, flags=re.I) |
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if not match: |
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return '' |
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domain, port = match.groups() |
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netloc = domain + (port if port else '') |
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netloc = netloc.encode('idna') |
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# ensure path is valid and convert Unicode chars to %-encoded |
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if not path: |
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path = '/' # eg: 'http://google.com' -> 'http://google.com/' |
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path = urllib.quote(urllib.unquote(path.encode('utf-8')), safe='/;') |
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# ensure query is valid |
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query = urllib.quote(urllib.unquote(query.encode('utf-8')), safe='=&?/') |
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# ensure fragment is valid |
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fragment = urllib.quote(urllib.unquote(fragment.encode('utf-8'))) |
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# piece it all back together, truncating it to a maximum of 4KB |
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url = urlparse.urlunsplit((scheme, netloc, path, query, fragment)) |
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return url[:4096] |
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#http://diveintopython.org/http_web_services/etags.html |
#http://diveintopython.org/http_web_services/etags.html |
class NotModifiedHandler(urllib2.BaseHandler): |
class NotModifiedHandler(urllib2.BaseHandler): |
def http_error_304(self, req, fp, code, message, headers): |
def http_error_304(self, req, fp, code, message, headers): |
addinfourl = urllib2.addinfourl(fp, headers, req.get_full_url()) |
addinfourl = urllib2.addinfourl(fp, headers, req.get_full_url()) |
addinfourl.code = code |
addinfourl.code = code |
return addinfourl |
return addinfourl |
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def fetchURL(docsdb, url, fieldName, agencyID, scrape_again=True): |
def fetchURL(docsdb, url, fieldName, agencyID, scrape_again=True): |
hash = hashlib.md5(url).hexdigest() |
url = canonurl(url) |
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hash = hashlib.md5(url).hexdigest().encode("utf-8") |
req = urllib2.Request(url) |
req = urllib2.Request(url) |
print "Fetching %s" % url |
print "Fetching %s" % url |
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if url.startswith("mailto") or url.startswith("javascript") or url.startswith("#") or url == None or url == "": |
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print "Not a valid HTTP url" |
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return (None,None) |
doc = docsdb.get(hash) |
doc = docsdb.get(hash) |
if doc == None: |
if doc == None: |
doc = {'_id': hash, 'agencyID': agencyID, 'url': url, 'fieldName':fieldName} |
doc = {'_id': hash, 'agencyID': agencyID, 'url': url, 'fieldName':fieldName} |
else: |
else: |
if (time.time() - doc['page_scraped']) < 3600: |
if (('page_scraped' in doc) and (time.time() - doc['page_scraped']) < 999999): |
print "Uh oh, trying to scrape URL again too soon!" |
print "Uh oh, trying to scrape URL again too soon!" |
last_attachment_fname = doc["_attachments"].keys()[-1] |
last_attachment_fname = doc["_attachments"].keys()[-1] |
last_attachment = docsdb.get_attachment(doc,last_attachment_fname) |
last_attachment = docsdb.get_attachment(doc,last_attachment_fname) |
return (doc['mime_type'],last_attachment) |
return (doc['mime_type'],last_attachment) |
if scrape_again == False: |
if scrape_again == False: |
print "Not scraping this URL again as requested" |
print "Not scraping this URL again as requested" |
return (None,None) |
return (None,None) |
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time.sleep(3) # wait 3 seconds to give webserver time to recover |
time.sleep(3) # wait 3 seconds to give webserver time to recover |
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#if there is a previous version stored in couchdb, load caching helper tags |
#if there is a previous version stored in couchdb, load caching helper tags |
if doc.has_key('etag'): |
if doc.has_key('etag'): |
req.add_header("If-None-Match", doc['etag']) |
req.add_header("If-None-Match", doc['etag']) |
if doc.has_key('last_modified'): |
if doc.has_key('last_modified'): |
req.add_header("If-Modified-Since", doc['last_modified']) |
req.add_header("If-Modified-Since", doc['last_modified']) |
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opener = urllib2.build_opener(NotModifiedHandler()) |
opener = urllib2.build_opener(NotModifiedHandler()) |
url_handle = opener.open(req) |
try: |
headers = url_handle.info() # the addinfourls have the .info() too |
url_handle = opener.open(req) |
doc['etag'] = headers.getheader("ETag") |
headers = url_handle.info() # the addinfourls have the .info() too |
doc['last_modified'] = headers.getheader("Last-Modified") |
doc['etag'] = headers.getheader("ETag") |
doc['date'] = headers.getheader("Date") |
doc['last_modified'] = headers.getheader("Last-Modified") |
doc['page_scraped'] = time.time() |
doc['date'] = headers.getheader("Date") |
doc['web_server'] = headers.getheader("Server") |
doc['page_scraped'] = time.time() |
doc['powered_by'] = headers.getheader("X-Powered-By") |
doc['web_server'] = headers.getheader("Server") |
doc['file_size'] = headers.getheader("Content-Length") |
doc['powered_by'] = headers.getheader("X-Powered-By") |
doc['mime_type'] = headers.getheader("Content-Type").split(";")[0] |
doc['file_size'] = headers.getheader("Content-Length") |
if hasattr(url_handle, 'code'): |
content_type = headers.getheader("Content-Type") |
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if content_type != None: |
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doc['mime_type'] = content_type.split(";")[0] |
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else: |
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(type,encoding) = mimetypes.guess_type(url) |
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doc['mime_type'] = type |
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if hasattr(url_handle, 'code'): |
if url_handle.code == 304: |
if url_handle.code == 304: |
print "the web page has not been modified" |
print "the web page has not been modified" |
return (None,None) |
return (None,None) |
else: |
else: |
content = url_handle.read() |
content = url_handle.read() |
docsdb.save(doc) |
docsdb.save(doc) |
doc = docsdb.get(hash) # need to get a _rev |
doc = docsdb.get(hash) # need to get a _rev |
docsdb.put_attachment(doc, content, str(time.time())+"-"+os.path.basename(url), doc['mime_type']) |
docsdb.put_attachment(doc, content, str(time.time())+"-"+os.path.basename(url), doc['mime_type']) |
return (doc['mime_type'], content) |
return (doc['mime_type'], content) |
#store as attachment epoch-filename |
#store as attachment epoch-filename |
else: |
except urllib2.URLError as e: |
print "error %s in downloading %s" % url_handle.code, URL |
error = "" |
doc['error'] = "error %s in downloading %s" % url_handle.code, URL |
if hasattr(e, 'reason'): |
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error = "error %s in downloading %s" % (str(e.reason), url) |
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elif hasattr(e, 'code'): |
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error = "error %s in downloading %s" % (e.code, url) |
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print error |
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doc['error'] = error |
docsdb.save(doc) |
docsdb.save(doc) |
return (None,None) |
return (None,None) |
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def scrapeAndStore(docsdb, url, depth, fieldName, agencyID): |
def scrapeAndStore(docsdb, url, depth, fieldName, agencyID): |
(mime_type,content) = fetchURL(docsdb, url, fieldName, agencyID) |
(mime_type,content) = fetchURL(docsdb, url, fieldName, agencyID) |
if content != None and depth > 0: |
if content != None and depth > 0: |
if mime_type == "text/html" or mime_type == "application/xhtml+xml" or mime_type =="application/xml": |
if mime_type == "text/html" or mime_type == "application/xhtml+xml" or mime_type =="application/xml": |
# http://www.crummy.com/software/BeautifulSoup/documentation.html |
# http://www.crummy.com/software/BeautifulSoup/documentation.html |
soup = BeautifulSoup(content) |
soup = BeautifulSoup(content) |
navIDs = soup.findAll(id=re.compile('nav|Nav|menu|bar')) |
navIDs = soup.findAll(id=re.compile('nav|Nav|menu|bar')) |
for nav in navIDs: |
for nav in navIDs: |
print "Removing element", nav['id'] |
print "Removing element", nav['id'] |
nav.extract() |
nav.extract() |
navClasses = soup.findAll(attrs={'class' : re.compile('nav|menu|bar')}) |
navClasses = soup.findAll(attrs={'class' : re.compile('nav|menu|bar')}) |
for nav in navClasses: |
for nav in navClasses: |
print "Removing element", nav['class'] |
print "Removing element", nav['class'] |
nav.extract() |
nav.extract() |
links = soup.findAll('a') # soup.findAll('a', id=re.compile("^p-")) |
links = soup.findAll('a') # soup.findAll('a', id=re.compile("^p-")) |
linkurls = set([]) |
linkurls = set([]) |
for link in links: |
for link in links: |
if link.has_key("href"): |
if link.has_key("href"): |
if link['href'].startswith("http"): |
if link['href'].startswith("http"): |
# lets not do external links for now |
# lets not do external links for now |
# linkurls.add(link['href']) |
# linkurls.add(link['href']) |
None |
None |
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if link['href'].startswith("mailto"): |
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# not http |
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None |
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if link['href'].startswith("javascript"): |
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# not http |
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None |
else: |
else: |
linkurls.add(urljoin(url,link['href'].replace(" ","%20"))) |
linkurls.add(urljoin(url,link['href'].replace(" ","%20"))) |
for linkurl in linkurls: |
for linkurl in linkurls: |
#print linkurl |
#print linkurl |
scrapeAndStore(docsdb, linkurl, depth-1, fieldName, agencyID) |
scrapeAndStore(docsdb, linkurl, depth-1, fieldName, agencyID) |
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couch = couchdb.Server('http://127.0.0.1:5984/') |
couch = couchdb.Server('http://127.0.0.1:5984/') |
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# select database |
# select database |
agencydb = couch['disclosr-agencies'] |
agencydb = couch['disclosr-agencies'] |
docsdb = couch['disclosr-documents'] |
docsdb = couch['disclosr-documents'] |
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for row in agencydb.view('app/getScrapeRequired'): #not recently scraped agencies view? |
for row in agencydb.view('app/getScrapeRequired'): #not recently scraped agencies view? |
agency = agencydb.get(row.id) |
agency = agencydb.get(row.id) |
print agency['name'] |
print agency['name'] |
for key in agency.keys(): |
for key in agency.keys(): |
if key == 'website' or key.endswith('URL'): |
if key == 'website': |
print key |
scrapeAndStore(docsdb, agency[key],0,key,agency['_id']) |
scrapeAndStore(docsdb, agency[key],agency['scrapeDepth'],key,agency['_id']) |
if key.endswith('URL'): |
agency['metadata']['lastscraped'] = time.time() |
print key |
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depth = 1 |
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if 'scrapeDepth' in agency.keys(): |
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depth = agency['scrapeDepth'] |
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scrapeAndStore(docsdb, agency[key],depth,key,agency['_id']) |
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agency['metadata']['lastScraped'] = time.time() |
agencydb.save(agency) |
agencydb.save(agency) |
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