#!/usr/bin/python3 import asyncio, traceback, socket, ssl from urllib.parse import urlparse, quote from flask import Flask, request, redirect, send_file, Response from hypercorn.config import Config from hypercorn.asyncio import serve app = Flask(__name__) @app.route("/") def root(): return send_file("home.html") @app.route("/external.png") def external(): return send_file("external.png") @app.route("/cross-server.png") def crosserver(): return send_file("cross-server.png") @app.route("/style.css") def style(): return send_file("style.css") @app.route("/gem") def relay(): url = request.args.get('gemini') queries = request.args.get('query') if url == None: return redirect("/") code = "

Something went wrong...

\n" title = "Something went wrong..." try: gsocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM) fulladdr = "gemini://" + url + ("?" + queries if queries != None else "") gemsocket = ssl._create_unverified_context().wrap_socket(gsocket, server_hostname=urlparse(fulladdr).hostname) gemsocket.connect((urlparse(fulladdr).hostname, 1965)) gemsocket.send(bytes(fulladdr + "\r\n", "UTF-8")) received = "" mimetype = "" gemraw = bytearray() num = 0 while True: gemresponse = gemsocket.recv(2048) try: if num = 0: try: mimetype = gemresponse.decode().replace("\r","").split("\n")[0].split(" ")[1].split(";")[0] if mimetype != "text/gemini".lower() and gemresponse.decode().replace("\r","").split("\n")[0].split(" ")[0][0] != "2": print("Non-ordinary type! " + mimetype) except: pass elif num = 1 and not mimetype in ["text/gemini", ""]: pass elif num >= 2 and not mimetype in ["text/gemini", ""]: for i in gemresponse: gemraw.append(i) if gemresponse.decode() != "": received += gemresponse.decode() else: break num+=1 except: return f'\nSomething went wrong...

Something went wrong...

The file that the Gemini server sent couldn\'t be decoded by Gem2Browser.

' if not mimetype.lower() in ["text/gemini", ""]: return bytes(gemraw) received = received.replace("\r", "") firstline = True redirected = False gemtext = True code = "" escaped = False for i in received.split("\n"): i = i.replace("<", "<") if firstline: if i.split(" ")[0][0] == "3": return redirect("/gem?gemini=" + quote(i.split(" ")[1][9:], safe='')) elif i.split(" ")[0][0] == "1": return f'\nInput required

Input required

The specified Gemini server wants more data: 

{i}




' elif i.split(" ")[0][0] != "2": return f'\nSomething went wrong...

Something went wrong...

The specified Gemini server returned a status of: {i}

' else: firstline = False if i.split(" ")[1].split(";")[0] != "text/gemini": print("Unrecognised type: " + i.split(" ")[1]) return Response(" ".join(received.split("\n")[1:]), mimetype=i.split(" ")[1]) else: if escaped: if i[0:3] == "```": code += "\n" escaped = False else: code += i + "\n" else: if i[0:2] == "# ": if title == "Something went wrong...": title = i[2:] temp = i[2:] code += f"

{temp}

\n" elif i[0:3] == "## ": temp = i[3:] code += f"

{temp}

\n" elif i[0:3] == "```": code += "
\n"
                        escaped = True
                    elif i[0:4] == "### ":
                        temp = i[4:]
                        code += f"
{temp}
\n"
                    elif i[0:2] == "* ":
                        temp = i[2:]
                        code += f"\n"
                    elif i[0:2] == "=>":
                        temp = " ".join(i[2:].strip().replace("	", " ").split(" "))
                        goto = temp.split(" ")[0]
                        prse = urlparse(goto)
                        extra = ""
                        extracomment = goto
                        if prse.netloc == "" and prse.scheme == "":
                            isdir = url[len(url) - 1] == "/"
                            isabs = goto[0] == "/" or goto[0:2] == "//"
                            dubleslash = goto[0:2] == "//"
                            if isabs:
                                tempurl = urlparse(fulladdr).hostname + (goto[1:] if dubleslash else goto)
                            elif isdir:
                                tempurl = url + goto
                            else:
                                tempurl = "/".join(url.split("/")[:-1]) + "/" + goto
                            goto = f"/gem?gemini={tempurl}"
                        elif prse.scheme != "gemini":
                            extra = ""
                            extracomment = f"This link points to an address that isn't gemini ({prse.scheme})"
                        else:
                            if prse.hostname != urlparse(fulladdr).hostname:
                                extra = ""
                                extracomment = f"This link points to an address that isn't from the server you're currently connecting to ({prse.hostname})"
                            goto = goto.replace("gemini://", "")
                            goto = f"/gem?gemini={goto}"
                        if temp.split(" ") == 1:
                            comment = goto
                        else:
                            comment = " ".join(temp.split(" ")[1:])
                        code += f"
{comment} {extra}
\n"
                    elif i[0:2] == "> ":
                        code += f"
{i}
\n"
                    else:
                        code += f"
{i}
\n"
        if title == "Something went wrong...":
            title = "gemini://" + url
    except:
        code += "
" + traceback.format_exc() + "
"
    return f'\n{title}{code}'

# Run the Hypercorn ASGI server
conf = Config()
conf.bind = "0.0.0.0:2009"
asyncio.run(serve(app, conf))