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from flask import Flask, request
import requests
import base64
import json
import re

app = Flask(__name__)

def parse_node_input(node_input):
    proxies_match = re.search(r'proxies:\s*\n([\s\S]*?)(?:\n\w+:|$)', node_input)
    if not proxies_match:
        return []

    proxies_text = proxies_match.group(1)
    nodes = re.findall(r'^\s*-\s*({[^}]+})', proxies_text, re.MULTILINE)
    
    parsed_nodes = []
    for node in nodes:
        node_dict = {}
        items = re.findall(r'(\w+):\s*([^,}\n]+)', node)
        for key, value in items:
            if key in ['port', 'alterId']:
                node_dict[key] = int(value)
            elif key in ['udp', 'tls']:
                node_dict[key] = value.lower() == 'true'
            else:
                node_dict[key] = value.strip("'\"")
        
        ws_opts_match = re.search(r'ws-opts:\s*({[^}]+})', node)
        if ws_opts_match:
            ws_opts = ws_opts_match.group(1)
            path_match = re.search(r'path:\s*([^,}]+)', ws_opts)
            if path_match:
                node_dict['ws-opts.path'] = path_match.group(1).strip("'\"")
            headers_match = re.search(r'headers:\s*({[^}]+})', ws_opts)
            if headers_match:
                headers = headers_match.group(1)
                host_match = re.search(r'Host:\s*([^,}]+)', headers)
                if host_match:
                    node_dict['ws-opts.headers.Host'] = host_match.group(1).strip("'\"")

        parsed_nodes.append(node_dict)

    return parsed_nodes

def convert_to_vmess(node):
    try:
        path = node.get('ws-opts.path', '')
        vmess_node = {
            "v": "2",
            "ps": node['name'],
            "add": node['server'],
            "port": str(node['port']),
            "id": node['uuid'],
            "aid": str(node.get('alterId', 0)),
            "scy": node.get('cipher', 'auto'),
            "net": node.get('network', 'tcp'),
            "type": "none",
            "host": node.get('ws-opts.headers.Host', node.get('servername', "")),
            "path": path,
            "tls": "tls" if node.get('tls', False) else ""
        }
        json_str = json.dumps(vmess_node, separators=(',', ':'))
        vmess_base64 = base64.b64encode(json_str.encode()).decode()
        return f"vmess://{vmess_base64}"
    except KeyError as e:
        return f"Error in VMess conversion: Missing {e} key"

def convert_to_vless(node):
    try:
        params = []
        if node.get('tls', False):
            params.append("security=tls")
        if node.get('flow', ''):
            params.append(f"flow={node['flow']}")
        if node.get('servername', ''):
            params.append(f"sni={node['servername']}")
        if node.get('ws-opts.path', ''):
            params.append(f"path={node['ws-opts.path']}")
        if node.get('ws-opts.headers.Host', ''):
            params.append(f"host={node['ws-opts.headers.Host']}")
        if node.get('client-fingerprint', ''):
            params.append(f"fp={node['client-fingerprint']}")
        
        param_str = "&".join(params)
        vless_link = f"vless://{node['uuid']}@{node['server']}:{node['port']}?{param_str}#{node['name']}"
        return vless_link
    except KeyError as e:
        return f"Error in VLess conversion: Missing {e} key"

def convert_to_trojan(node):
    try:
        trojan_link = f"trojan://{node['password']}@{node['server']}:{node['port']}?sni={node.get('sni', '')}#{node['name']}"
        return trojan_link
    except KeyError as e:
        return f"Error in Trojan conversion: Missing {e} key"

def convert_to_ss(node):
    try:
        ss_config = f"{node['cipher']}:{node['password']}"
        encoded_config = base64.b64encode(ss_config.encode()).decode()
        ss_link = f"ss://{encoded_config}@{node['server']}:{node['port']}#{node['name']}"
        return ss_link
    except KeyError as e:
        return f"Error in Shadowsocks conversion: Missing {e} key"

def convert_to_hysteria2(node):
    try:
        hysteria2_link = (
            f"hysteria2://{node['password']}@{node['server']}:{node['port']}"
            f"?auth={node.get('auth', '')}&skip-cert-verify={str(node.get('skip-cert-verify', False)).lower()}"
            f"&udp={str(node.get('udp', False)).lower()}#{node['name']}"
        )
        return hysteria2_link
    except KeyError as e:
        return f"Error in Hysteria2 conversion: Missing {e} key"

@app.route('/', methods=['GET'])
def convert_nodes():
    url = request.args.get('url')
    if not url:
        return "Please provide a URL", 400

    try:
        response = requests.get(url)
        response.raise_for_status()
        node_input = response.text
    except requests.RequestException as e:
        return f"Error fetching URL: {str(e)}", 500

    nodes = parse_node_input(node_input)
    
    converted_nodes = []
    
    for node in nodes:
        if node['type'] == 'ss':
            converted_nodes.append(convert_to_ss(node))
        elif node['type'] == 'vmess':
            converted_nodes.append(convert_to_vmess(node))
        elif node['type'] == 'vless':
            converted_nodes.append(convert_to_vless(node))
        elif node['type'] == 'trojan':
            converted_nodes.append(convert_to_trojan(node))
        elif node['type'] == 'hysteria2':
            converted_nodes.append(convert_to_hysteria2(node))
        else:
            converted_nodes.append(f"Unknown node type: {node['type']}")

    result = "\n".join(converted_nodes)
    return result, 200, {'Content-Type': 'text/plain; charset=utf-8'}

if __name__ == '__main__':
    app.run(host='0.0.0.0', port=8080)