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asyncio doc: the "Get HTTP headers" example now supports HTTPS

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This commit is contained in:
Victor Stinner 2014-10-11 15:52:14 +02:00
parent 4cc0551773
commit 5121a9ba4a
1 changed files with 16 additions and 6 deletions
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22
Doc/library/asyncio-stream.rst
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@ -238,8 +238,11 @@ IncompleteReadError
Read bytes string before the end of stream was reached (:class:`bytes`).
Example
=======
Stream examples
===============
Get HTTP headers
----------------
Simple example querying HTTP headers of the URL passed on the command line::
@ -250,10 +253,14 @@ Simple example querying HTTP headers of the URL passed on the command line::
@asyncio.coroutine
def print_http_headers(url):
url = urllib.parse.urlsplit(url)
reader, writer = yield from asyncio.open_connection(url.hostname, 80)
query = ('HEAD {url.path} HTTP/1.0\r\n'
'Host: {url.hostname}\r\n'
'\r\n').format(url=url)
if url.scheme == 'https':
connect = asyncio.open_connection(url.hostname, 443, ssl=True)
else:
connect = asyncio.open_connection(url.hostname, 80)
reader, writer = yield from connect
query = ('HEAD {path} HTTP/1.0\r\n'
'Host: {hostname}\r\n'
'\r\n').format(path=url.path or '/', hostname=url.hostname)
writer.write(query.encode('latin-1'))
while True:
line = yield from reader.readline()
@ -263,6 +270,9 @@ Simple example querying HTTP headers of the URL passed on the command line::
if line:
print('HTTP header> %s' % line)
# Ignore the body, close the socket
writer.close()
url = sys.argv[1]
loop = asyncio.get_event_loop()
task = asyncio.async(print_http_headers(url))