Current File : /opt/hc_python/share/doc/pycurl/examples/quickstart//response_headers.py
#! /usr/bin/env python
# -*- coding: utf-8 -*-
# vi:ts=4:et
import pycurl
import re
try:
from io import BytesIO
except ImportError:
from StringIO import StringIO as BytesIO
headers = {}
def header_function(header_line):
# HTTP standard specifies that headers are encoded in iso-8859-1.
# On Python 2, decoding step can be skipped.
# On Python 3, decoding step is required.
header_line = header_line.decode('iso-8859-1')
# Header lines include the first status line (HTTP/1.x ...).
# We are going to ignore all lines that don't have a colon in them.
# This will botch headers that are split on multiple lines...
if ':' not in header_line:
return
# Break the header line into header name and value.
name, value = header_line.split(':', 1)
# Remove whitespace that may be present.
# Header lines include the trailing newline, and there may be whitespace
# around the colon.
name = name.strip()
value = value.strip()
# Header names are case insensitive.
# Lowercase name here.
name = name.lower()
# Now we can actually record the header name and value.
headers[name] = value
buffer = BytesIO()
c = pycurl.Curl()
c.setopt(c.URL, 'http://pycurl.io')
c.setopt(c.WRITEFUNCTION, buffer.write)
# Set our header function.
c.setopt(c.HEADERFUNCTION, header_function)
c.perform()
c.close()
# Figure out what encoding was sent with the response, if any.
# Check against lowercased header name.
encoding = None
if 'content-type' in headers:
content_type = headers['content-type'].lower()
match = re.search('charset=(\S+)', content_type)
if match:
encoding = match.group(1)
print('Decoding using %s' % encoding)
if encoding is None:
# Default encoding for HTML is iso-8859-1.
# Other content types may have different default encoding,
# or in case of binary data, may have no encoding at all.
encoding = 'iso-8859-1'
print('Assuming encoding is %s' % encoding)
body = buffer.getvalue()
# Decode using the encoding we figured out.
print(body.decode(encoding))
