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scrape_denied_courses.py
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scrape_denied_courses.py
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#!/usr/bin/env python
import argparse
import csv
import os
import errno
from six.moves.html_parser import HTMLParser
import sys
from lxml.html.soupparser import fromstring
import requests
BASE_URL = "https://web3.ncaa.org/hsportal/exec/hsAction"
FAKE_USER_AGENT = "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.116 Safari/537.36"
CACHE_DIR_NAME = "_ncaa_courses_cache"
def get_state_schools_html_cache_path(state_abbrev, cache_path):
return os.path.join(cache_path, 'schools_' + state_abbrev + '.html')
def get_state_schools_html_from_cache(state_abbrev, cache_path):
schools_html_path = get_state_schools_html_cache_path(state_abbrev,
cache_path)
with open(schools_html_path) as f:
return f.read()
def save_state_schools_html_to_cache(state_abbrev, schools_html, cache_path):
schools_html_path = get_state_schools_html_cache_path(state_abbrev,
cache_path)
with open(schools_html_path, 'w') as f:
f.write(schools_html)
def fetch_state_schools(state_abbrev, user_agent=FAKE_USER_AGENT):
data = {
'hsCode': '',
'ceebCode': '',
'state': state_abbrev,
'city': '',
'name': '',
'hsActionSubmit': 'Search',
}
headers = {
'User-Agent': user_agent
}
r = requests.post(BASE_URL, data=data, headers=headers)
return r.content
def parse_state_schools(schools_html):
schools = []
root = fromstring(schools_html)
schools_form = root.cssselect('form[name="selectHsForm"]')[0]
for row in schools_form.cssselect('tr'):
form_input = row.cssselect('input[name="hsCode"]')
if len(form_input) == 0:
continue
school = {}
school['hs_code'] = form_input[0].get('value')
cols = row.cssselect('td')
school['high_school_name'] = cols[1].text_content().strip()
school['city'] = cols[2].text_content().strip()
school['state'] = cols[3].text_content().strip()[:2]
schools.append(school)
return schools
def fetch_school_html(hs_code, user_agent=FAKE_USER_AGENT):
data = {
'hsCode': hs_code,
'ceebCode': '',
'state': '',
'city': '',
'name': '',
'hsActionSubmit': 'Search',
}
headers = {
'User-Agent': user_agent
}
r = requests.post(BASE_URL, data=data, headers=headers)
return r.content
def get_school_html_cache_path(hs_code, cache_path):
return os.path.join(cache_path, 'school_' + hs_code + '.html')
def get_school_html_from_cache(hs_code, cache_path):
school_html_path = get_school_html_cache_path(hs_code, cache_path)
with open(school_html_path) as f:
return f.read()
def save_school_html_to_cache(hs_code, school_html, cache_path):
school_html_path = get_school_html_cache_path(hs_code, cache_path)
with open(school_html_path, 'w') as f:
f.write(school_html)
def parse_denied_courses(school_html):
root = fromstring(school_html)
denied_table = root.cssselect('#NcaaCrs_DeniedCategory_All')
courses = []
for tr in denied_table[0].cssselect('tr')[1:]:
tables = tr.cssselect('table')
try:
subject = tables[0].cssselect('.hs_tableHeader')[0].text_content()
except IndexError:
continue
for course_tr in tables[1].cssselect('tbody tr'):
course = {}
tds = course_tr.cssselect('td')
course['subject'] = subject
course['course_weight'] = tds[0].text_content().strip()
h = HTMLParser()
course['title'] = h.unescape(tds[1].text_content().strip())
course['notes'] = tds[2].text_content().strip()
course['max_credits'] = tds[3].text_content().strip()
course['ok_through'] = tds[4].text_content().strip()
course['reason_code'] = tds[5].text_content().strip()
course['disability_course'] = tds[6].text_content().strip()
courses.append(course)
return courses
def make_sure_path_exists(path):
try:
os.makedirs(path)
except OSError as exception:
if exception.errno != errno.EEXIST:
raise
if __name__ == "__main__":
parser = argparse.ArgumentParser(description="Scrape denied courses")
parser.add_argument('state', help='State abbreviation')
parser.add_argument('--cache-path',
default=os.path.join(os.getcwd(), CACHE_DIR_NAME),
help="Cache directory")
args = parser.parse_args()
make_sure_path_exists(args.cache_path)
try:
schools_html = get_state_schools_html_from_cache(args.state, args.cache_path)
except IOError:
schools_html = fetch_state_schools(args.state)
save_state_schools_html_to_cache(args.state, schools_html, args.cache_path)
schools = parse_state_schools(schools_html)
fieldnames = [
'hs_code',
'high_school_name',
'city',
'state',
'subject',
'course_weight',
'title',
'notes',
'max_credits',
'ok_through',
'reason_code',
'disability_course',
]
writer = csv.DictWriter(sys.stdout, fieldnames=fieldnames)
writer.writeheader()
for school in schools:
try:
school_html = get_school_html_from_cache(school['hs_code'], args.cache_path)
except IOError:
school_html = fetch_school_html(school['hs_code'])
save_school_html_to_cache(school['hs_code'], school_html, args.cache_path)
courses = parse_denied_courses(school_html)
for course in courses:
course.update(**school)
writer.writerow(course)