127 lines
4.5 KiB
Python
127 lines
4.5 KiB
Python
"""Gemini-related features of the browser."""
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from bebop.browser.browser import Browser
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from bebop.navigation import set_parameter
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from bebop.page import Page
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from bebop.protocol import Request, Response
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def open_gemini_url(browser: Browser, url, redirects=0, history=True,
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use_cache=True):
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"""Open a Gemini URL and set the formatted response as content.
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After initiating the connection, TODO
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"""
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browser.set_status(f"Loading {url}")
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if use_cache and url in browser.cache:
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browser.load_page(browser.cache[url])
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if browser.current_url and history:
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browser.history.push(browser.current_url)
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browser.current_url = url
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browser.set_status(url)
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return
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req = Request(url, browser.stash)
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connected = req.connect()
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if not connected:
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if req.state == Request.STATE_ERROR_CERT:
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error = f"Certificate was missing or corrupt ({url})."
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elif req.state == Request.STATE_UNTRUSTED_CERT:
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error = f"Certificate has been changed ({url})."
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# TODO propose the user ways to handle this.
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elif req.state == Request.STATE_CONNECTION_FAILED:
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error_details = f": {req.error}" if req.error else "."
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error = f"Connection failed ({url})" + error_details
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else:
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error = f"Connection failed ({url})."
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browser.set_status_error(error)
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return
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if req.state == Request.STATE_INVALID_CERT:
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# TODO propose abort / temp trust
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pass
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elif req.state == Request.STATE_UNKNOWN_CERT:
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# TODO propose abort / temp trust / perm trust
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pass
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else:
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pass # TODO
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data = req.proceed()
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if not data:
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browser.set_status_error(f"Server did not respond in time ({url}).")
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return
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response = Response.parse(data)
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if not response:
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browser.set_status_error(f"Server response parsing failed ({url}).")
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return
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if response.code == 20:
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handle_code = handle_response_content(browser, response)
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if handle_code == 0:
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if browser.current_url and history:
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browser.history.push(browser.current_url)
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browser.current_url = url
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browser.cache[url] = browser.page_pad.current_page
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browser.set_status(url)
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elif handle_code == 1:
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browser.set_status(f"Downloaded {url}.")
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elif response.generic_code == 30 and response.meta:
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browser.open_url(response.meta, base_url=url, redirects=redirects + 1)
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elif response.generic_code in (40, 50):
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error = f"Server error: {response.meta or Response.code.name}"
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browser.set_status_error(error)
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elif response.generic_code == 10:
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handle_input_request(browser, url, response.meta)
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else:
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error = f"Unhandled response code {response.code}"
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browser.set_status_error(error)
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def handle_response_content(browser: Browser, response: Response) -> int:
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"""Handle a response's content from a Gemini server.
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According to the MIME type received or inferred, render or download the
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response's content.
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Currently only text/gemini content is rendered.
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Arguments:
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- response: a successful Response.
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Returns:
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An error code: 0 means a page has been loaded, so any book-keeping such
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as history management can be applied; 1 means a content has been
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successfully retrieved but has not been displayed (e.g. non-text
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content) nor saved as a page; 2 means that the content could not be
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handled, either due to bogus MIME type or MIME parameters.
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"""
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mime_type = response.get_mime_type()
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if mime_type.main_type == "text":
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if mime_type.sub_type == "gemini":
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encoding = mime_type.charset
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try:
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text = response.content.decode(encoding, errors="replace")
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except LookupError:
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browser.set_status_error("Unknown encoding {encoding}.")
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return 2
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browser.load_page(Page.from_gemtext(text))
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return 0
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else:
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pass # TODO
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else:
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pass # TODO
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return 1
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def handle_input_request(browser: Browser, from_url: str, message: str =None):
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"""Focus command-line to pass input to the server."""
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if message:
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browser.set_status(f"Input needed: {message}")
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else:
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browser.set_status("Input needed:")
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user_input = browser.command_line.focus("?")
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if user_input:
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url = set_parameter(from_url, user_input)
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open_gemini_url(browser, url)
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