Initial implementation.
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#!/usr/bin/env python3
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import cgi
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import socket
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import ssl
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import urllib.parse
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menu = []
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hist = []
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while True:
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# Get input
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cmd = input("> ").strip()
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# Handle things other than requests
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if cmd.lower() == "q":
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print("Bye!")
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break
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# Get URL, from menu, history or direct entry
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if cmd.isnumeric():
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url = menu[int(cmd)-1]
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elif cmd.lower() == "b":
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# Yes, twice
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url = hist.pop()
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url = hist.pop()
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else:
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url = cmd
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if not "://" in url:
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url = "gemini://" + url
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parsed_url = urllib.parse.urlparse(url)
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if parsed_url.scheme != "gemini":
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print("Sorry, Gemini links only.")
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continue
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# Do the Gemini transaction
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try:
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s = socket.create_connection((parsed_url.netloc, 1965))
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context = ssl.SSLContext()
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context.check_hostname = False
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context.verify_mode = ssl.CERT_NONE
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s = context.wrap_socket(s, server_hostname = parsed_url.netloc)
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s.sendall((parsed_url.path + '\r\n').encode("UTF-8"))
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except:
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print("Network error!")
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continue
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# Check header and fail if not okay
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fp = s.makefile("rb")
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header = fp.readline()
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header = header.decode("UTF-8").strip()
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status, mime = header.split("\t")
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if not status.startswith("2"):
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print("Error %s: %s" % (status, mime))
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continue
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# Text only!
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if not mime.startswith("text/"):
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print("Sorry, plain text only.")
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continue
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else:
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mime, mime_opts = cgi.parse_header(mime)
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body = fp.read()
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body = body.decode(mime_opts.get("charset","UTF-8"))
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# Handle a Gemini map
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if mime == "text/gemini":
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menu = []
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for line in body.splitlines():
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if line.startswith("\t") and line.count("\t") == 2:
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_, text, link_url = line.split("\t")
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# Absolutise relative links
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if "://" not in link_url:
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# Python's URL tools somehow only work with known schemes?
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base = url.replace("gemini://","http://")
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link_url = urllib.parse.urljoin(base, link_url)
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link_url = link_url.replace("http://", "gemini://")
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menu.append(link_url)
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print("[%d] %s" % (len(menu), text))
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else:
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print(line)
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# Handle any other plain text
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else:
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print(body)
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hist.append(url)
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