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import re
import socket
import ssl
import urllib.parse
def htmlescape(text: str) -> str:
return text.replace('<', '<').replace('>', '>')
def gem2html(gem: str) -> str:
html = []
state = 'text'
blanklines = 0
for line in gem.split('\n'):
if line.startswith('```'):
if state == 'pre':
newstate = 'text'
blanklines = 0
else:
newstate = 'pre'
elif state == 'pre':
newstate = 'pre'
elif line.startswith('=>'):
newstate = 'links'
elif line.startswith('* '):
newstate = 'list'
else:
newstate = 'text'
if state != 'pre':
if len(line.strip()) == 0:
blanklines += 1
if blanklines > 1:
html.append('<br/>')
continue
blanklines = 0
if state != newstate:
if state in ('links', 'list'):
html.append('</ul>')
elif state == 'pre':
html.append('</pre>')
if newstate in ('links', 'list'):
html.append('<ul>')
elif newstate == 'pre':
html.append('<pre>')
state = newstate
if line.startswith('```'):
pass
elif state == 'links':
tokens = line.split(None, 2)
if len(tokens) == 3:
_, url, text = tokens
html.append('<li><a href="{url}">{text}</a></li>'.format(url=url, text=text))
else:
_, url = tokens
html.append('<li><a href="{url}">{url}</a></li>'.format(url=url))
elif state == 'list':
html.append('<li>{}</li>'.format(line[2:]))
elif state == 'pre':
html.append(line)
else:
if line.startswith('###'):
html.append('<h3>{}</h3>'.format(line[3:].lstrip()))
elif line.startswith('##'):
html.append('<h2>{}</h2>'.format(line[2:].lstrip()))
elif line.startswith('#'):
html.append('<h1>{}</h1>'.format(line[1:].lstrip()))
else:
html.append('<p>{}</p>'.format(htmlescape(line)))
return '\n'.join(html)
def urljoin(base: str, url: str) -> str:
if base is None:
return url
base = re.sub('^gemini:', 'http:', base)
url = re.sub('^gemini:', 'http:', url)
return re.sub('^http:', 'gemini:', urllib.parse.urljoin(base, url))
def get(url: str) -> dict:
url_parts = urllib.parse.urlsplit(url)
if len(url_parts.path) == 0:
return {
'status': '32',
'meta': urllib.parse.urlunsplit((
url_parts.scheme,
url_parts.netloc,
'/',
url_parts.query,
url_parts.fragment,
))
}
context = ssl.create_default_context()
context.check_hostname = False
context.verify_mode = ssl.CERT_NONE
port = 1965 if url_parts.port is None else url_parts.port
with socket.create_connection((url_parts.hostname, port)) as sock:
with context.wrap_socket(sock, server_hostname=url_parts.hostname) as ssock:
ssock.sendall('gemini://{}{}\r\n'.format(url_parts.hostname, url_parts.path).encode('utf8'))
fp = ssock.makefile(mode='rb')
header = fp.readline(1027)
status, meta = header.decode('utf8').split(None, 1)
if status[0] != '2':
return {
'status': status,
'meta': meta.strip(),
}
body = fp.read()
return {
'status': status,
'meta': meta.strip(),
'body': body.decode('utf8'),
}
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