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webometric.py
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webometric.py
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from sgmllib import SGMLParser
from urllib2 import urlopen, Request, BaseHandler
from httplib import BadStatusLine
import time
import MySQLdb
WS_URL = 'http://www.webometrics.info/university_by_country.asp?country=%s'
DB_HOST = 'localhost'
DB_NAME = 'bell'
DB_USER = 'root'
DB_PASSWD = '123456'
TBL_COUNTRY = 'countries'
COUNTRY_ID = 'id'
COUNTRY_CODE = 'iso2'
TBL_SCHOOL = 'webometric_universities'
class UnivParser(SGMLParser):
domain = 'http://www.webometrics.info/'
path = '/university_by_country.asp?country=%s'
univ = []
errorURL = []
insideRowData = 0
insideColOfUnivName = 0
passedColOfUnivName = 0
insideColOfUnivLink = 0
insideUnivLink = 0
currentUniv = {}
sleepCount = 1;
insideColNav = 0
insideLinkOfNav = 0
currentLinkOfNav = ''
nextPage = ''
pageNumber = 1
endOfPage = 0
def __init__(self):
SGMLParser.__init__(self, verbose=0)
def parse(self, url):
self.univ = []
self.pageNumber = 1
self.goToNextPage(url)
return self.univ
def goToNextPage(self, url):
print "crawl page %d" % self.pageNumber
self.insideRowData = 0
self.insideColOfUnivName = 0
self.passedColOfUnivName = 0
self.insideColOfUnivLink = 0
self.insideUnivLink = 0
self.currentUniv = {}
self.insideColNav = 0
self.insideLinkOfNav = 0
self.currentLinkOfNav = ''
self.nextPage = ''
self.endOfPage = 0
try:
req = urlopen(url)
except IOError, e:
print "Oops, we got HTTPError."
reason = ""
if hasattr(e, 'reason'):
reason = 'Failed to reach a server. Reason: %d' % e.reason
elif hasattr(e, 'code'):
reason = 'The server couldn\'t fulfill the request. Error code: %d' % e.code
print reason
self.errorURL.append({'url': url, 'reason': reason})
return
except BadStatusLine, e:
reason = ""
if hasattr(e, 'reason'):
reason = 'Failed to reach a server. Reason: %d' % e.reason
elif hasattr(e, 'code'):
reason = 'The server couldn\'t fulfill the request. Error code: %d' % e.code
print reason
self.errorURL.append({'url': url, 'reason': reason})
return
finally:
self.sleepCount = 1
self.feed(req.read())
req.close()
if len(self.nextPage):
self.goToNextPage(self.domain + self.nextPage)
def __sleep(self):
time.sleep(0.5 * self.sleepCount)
def getErrorURL(self):
return self.errorURL
def start_tr(self, attrs):
if self.insideRowData == 0:
for name, val in attrs:
if name == 'class' and val == 'nav6a':
self.insideRowData = 1
def start_td(self, attrs):
if self.insideRowData:
if self.passedColOfUnivName == 0:
self.insideColOfUnivName = 1
else:
self.insideColOfUnivLink = 1
else: # inside col of nav
for name, val in attrs:
if name == 'class' and val == 'nav6a':
self.insideColNav = 1
def start_a(self, attrs):
if self.insideColOfUnivName:
self.insideUnivLink = 1
elif self.insideColNav:
for name, val in attrs:
if name == 'class' and val == 'nav6a':
self.insideLinkOfNav = 1
if name == 'href':
self.currentLinkOfNav = val
def end_tr(self):
if self.insideRowData:
self.insideRowData = 0
self.passedColOfUnivName = 0
self.univ.append( self.currentUniv )
self.currentUniv = {}
def end_td(self):
if self.insideRowData:
if self.insideColOfUnivName:
self.insideColOfUnivName = 0
self.passedColOfUnivName = 1
else:
self.insideColOfUnivLink = 0
elif self.insideColNav:
self.insideColNav = 0
def end_a(self):
if self.insideUnivLink:
self.insideUnivLink = 0
elif self.insideLinkOfNav:
self.insideLinkOfNav = 0
self.currentLinkOfNav = ''
def handle_data(self, data):
if self.insideUnivLink:
self.currentUniv['name'] = unicode( data.strip().replace('"', '\\"'), 'latin-1')
print self.currentUniv['name']
elif self.insideColOfUnivLink:
self.currentUniv['link'] = u'%s' % data.strip()
elif self.insideLinkOfNav and data.lower() == 'next' and self.nextPage == '':
self.nextPage = self.currentLinkOfNav
self.pageNumber += 1
def buildSchools():
conn = MySQLdb.connect(
host = DB_HOST,
user = DB_USER,
passwd = DB_PASSWD,
db = DB_NAME,
charset = 'latin1'
)
print "Creating table %s\n" % TBL_SCHOOL
cursor = conn.cursor()
cursor.execute("DROP TABLE IF EXISTS %s" % (TBL_SCHOOL))
cursor.execute("CREATE TABLE %s(`id` INT(11) NOT NULL AUTO_INCREMENT,`country_id` INT(5) NOT NULL,`name` VARCHAR(150) NOT NULL, `url` VARCHAR(150) NOT NULL, PRIMARY KEY (`id`), KEY `country_id` (`country_id`)) ENGINE=MyISAM DEFAULT CHARSET=utf8" % (TBL_SCHOOL))
print "Get countries from table %s\n\n" % TBL_COUNTRY
cursor.execute("SELECT %s, %s FROM %s WHERE 1" % (COUNTRY_ID, COUNTRY_CODE, TBL_COUNTRY))
countries = cursor.fetchall()
w = UnivParser()
print "Trying to build schools from webometric..\n"
for country in countries:
print "\nPopulate schools in %s" % country[1]
schools = w.parse(WS_URL % country[1].lower())
for school in schools:
cursor.execute('''INSERT INTO %s VALUES(NULL, %d, "%s", "%s")''' % (TBL_SCHOOL, country[0], school['name'], school['link']))
print "\nEnd building schools."
""" print error """
for err in w.getErrorURL():
print "%s\n" % err
w.close()
cursor.close()
conn.close()
def insertSchools(url, cc):
conn = MySQLdb.connect(
host = DB_HOST,
user = DB_USER,
passwd = DB_PASSWD,
db = DB_NAME,
charset = 'latin1'
)
cursor = conn.cursor()
cursor.execute("SELECT %s FROM %s WHERE iso2 = '%s'" % (COUNTRY_ID, TBL_COUNTRY, cc.upper()))
country = cursor.fetchall()
w = UnivParser()
schools = w.parse(url)
for school in schools:
cursor.execute('''INSERT INTO %s VALUES(NULL, %d, "%s", "%s")''' % (TBL_SCHOOL, country[0][0], school['name'], school['link']))
print "\nEnd building schools."
""" print error """
for err in w.getErrorURL():
print "%s\n" % err
w.close()
cursor.close()
conn.close()
if __name__ == "__main__":
buildSchools()