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# http://slides.com/robinchew/deck | |
from collections import defaultdict | |
from textwrap import dedent | |
from urllib.parse import urlparse, parse_qs | |
from wsgiref.util import setup_testing_defaults | |
from wsgiref.simple_server import make_server | |
import csv | |
import os | |
import sys | |
PORT = int(sys.argv[1]) | |
CSV_PATH = 'students.csv' | |
FIELDS = ('Name', 'Degree',) | |
def index(data): | |
if set(data.keys()) == set(FIELDS): | |
csv_exists = os.path.isfile(CSV_PATH) | |
with open(CSV_PATH, 'a') as f: | |
if not csv_exists: | |
f = open(CSV_PATH, 'w') | |
f.write(','.join(FIELDS)+'\n') | |
f.write(','.join(data[field] for field in FIELDS)+'\n') | |
return ''' | |
<h1>Index</h1> | |
<pre>{0}</pre> | |
<form method="POST"> | |
{1} | |
<input type="submit" /> | |
</form> | |
'''.format( | |
str(data), | |
''.join( | |
'{0} <input name="{0}" />'.format(name) | |
for name in FIELDS | |
) | |
) | |
def stat(data): | |
degree_field = FIELDS[1] | |
count_map = defaultdict(int) | |
with open(CSV_PATH) as f: | |
for row in csv.DictReader(f): | |
count_map[row[degree_field]] += 1 | |
return ''' | |
<h1>Stat</h1> | |
<h2>{0}</h2> | |
<style> | |
table{{ | |
border-collapse: collapse; | |
}} | |
td{{ | |
border: 1px solid grey; | |
}} | |
</style> | |
<table> | |
<tr> | |
{1} | |
</tr> | |
</table> | |
'''.format( | |
FIELDS[1], | |
'</tr><tr>'.join( | |
'<td>{0}</td><td>{1}</td>'.format(value, count) | |
for value, count in count_map.items() | |
) | |
) | |
router = { | |
'': index, | |
'stat': stat, | |
} | |
def app(environ, start_response): | |
#setup_testing_defaults(environ) | |
path = environ['PATH_INFO'] | |
method = environ['REQUEST_METHOD'] | |
status = '200 OK' | |
headers = [('Content-type', 'text/html')] | |
start_response(status, headers) | |
if method == 'POST': | |
query_string = environ['wsgi.input'].read(int(environ['CONTENT_LENGTH'])).decode('ascii') | |
else: | |
query_string = environ['QUERY_STRING'] | |
data = { | |
k: l[0] if len(l) else None | |
for k, l in parse_qs(query_string).items() | |
} | |
return [router.get( | |
path.strip('/'), | |
lambda d: '' | |
)(data).encode('ascii')] | |
httpd = make_server('', PORT, app) | |
print("serving at port", PORT) | |
httpd.serve_forever() |
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