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from flask import Flask, request, jsonify, Response
from flask_socketio import SocketIO, emit
from uuid import uuid4
import os
import json
import logging
import requests
from datetime import datetime
import eventlet
eventlet.monkey_patch()
app = Flask(__name__)
socketio = SocketIO(app)
# 从环境变量中获取API密钥
API_KEY = os.getenv('PPLX_KEY')
# 配置代理
class ProxyAgent:
def __init__(self):
self.proxy = os.getenv('HTTP_PROXY') or os.getenv('HTTPS_PROXY')
def get_session(self):
session = requests.Session()
if self.proxy:
session.proxies = {
'http': self.proxy,
'https': self.proxy
}
return session
agent = ProxyAgent()
opts = {
'agent': agent,
'auth': {
'jwt': 'anonymous-ask-user',
},
'reconnection': False,
'transports': ['websocket'],
'path': '/socket.io',
'hostname': 'www.perplexity.ai',
'secure': True,
'port': '443',
'extraHeaders': {
'Cookie': os.getenv('PPLX_COOKIE'),
'User-Agent': os.getenv('USER_AGENT'),
'Accept': '*/*',
'priority': 'u=1, i',
'Referer': 'https://www.perplexity.ai/',
},
}
# 添加中间件来验证API密钥
def validate_api_key():
api_key = request.headers.get('x-api-key')
if api_key != API_KEY:
log_request(request, 401)
return jsonify({'error': 'Invalid API key'}), 401
return None
# 日志记录函数
def log_request(req, status):
timestamp = datetime.now().isoformat()
ip = req.remote_addr
route = req.path
logging.info(f'{timestamp} - {ip} - {route} - {status}')
# 根路由处理
@app.route('/', methods=['GET'])
def root():
log_request(request, 200)
return jsonify({
'message': 'Welcome to the Perplexity AI Proxy API',
'endpoints': {
'/ai/v1/messages': {
'method': 'POST',
'description': 'Send a message to the AI',
'headers': {
'x-api-key': 'Your API key (required)',
'Content-Type': 'application/json'
},
'body': {
'messages': 'Array of message objects',
'stream': 'Boolean (true for streaming response)',
# 其他可能的参数...
}
}
}
})
# 在路由中使用API密钥验证中间件
@app.route('/ai/v1/messages', methods=['POST'])
def ai_messages():
validation_error = validate_api_key()
if validation_error:
return validation_error
raw_body = request.data.decode('utf-8')
try:
json_body = json.loads(raw_body)
if json_body.get('stream') is False:
log_request(request, 200)
return jsonify({
'id': str(uuid4()),
'content': [
{
'text': 'Please turn on streaming.',
},
{
'id': 'string',
'name': 'string',
'input': {},
},
],
'model': 'string',
'stop_reason': 'end_turn',
'stop_sequence': 'string',
'usage': {
'input_tokens': 0,
'output_tokens': 0,
},
})
elif json_body.get('stream') is True:
def generate():
try:
# 计算用户消息长度
user_message = [{'question': '', 'answer': ''}]
last_update = True
if json_body.get('system'):
json_body['messages'].insert(0, {'role': 'system', 'content': json_body['system']})
for msg in json_body['messages']:
if msg['role'] in ['system', 'user']:
if last_update:
user_message[-1]['question'] += msg['content'] + '\n'
elif user_message[-1]['question'] == '':
user_message[-1]['question'] += msg['content'] + '\n'
else:
user_message.append({'question': msg['content'] + '\n', 'answer': ''})
last_update = True
elif msg['role'] == 'assistant':
if not last_update:
user_message[-1]['answer'] += msg['content'] + '\n'
elif user_message[-1]['answer'] == '':
user_message[-1]['answer'] += msg['content'] + '\n'
else:
user_message.append({'question': '', 'answer': msg['content'] + '\n'})
last_update = False
previous_messages = '\n\n'.join(msg['content'] for msg in json_body['messages'])
msg_id = str(uuid4())
yield create_event('message_start', {
'type': 'message_start',
'message': {
'id': msg_id,
'type': 'message',
'role': 'assistant',
'content': [],
'model': 'claude-3-opus-20240229',
'stop_reason': None,
'stop_sequence': None,
'usage': {'input_tokens': 8, 'output_tokens': 1},
},
})
yield create_event('content_block_start', {'type': 'content_block_start', 'index': 0, 'content_block': {'type': 'text', 'text': ''}})
yield create_event('ping', {'type': 'ping'})
# 代理响应
socket = socketio.connect('wss://www.perplexity.ai/', **opts)
@socket.on('connect')
def on_connect():
logging.info(' > [Connected]')
socket.emit('perplexity_ask', previous_messages, {
'version': '2.9',
'source': 'default',
'attachments': [],
'language': 'en-GB',
'timezone': 'Europe/London',
'search_focus': 'writing',
'frontend_uuid': str(uuid4()),
'mode': 'concise',
'is_related_query': False,
'is_default_related_query': False,
'visitor_id': str(uuid4()),
'frontend_context_uuid': str(uuid4()),
'prompt_source': 'user',
'query_source': 'home'
}, callback=on_response)
def on_response(response):
logging.info(response)
yield create_event('content_block_stop', {'type': 'content_block_stop', 'index': 0})
yield create_event('message_delta', {
'type': 'message_delta',
'delta': {'stop_reason': 'end_turn', 'stop_sequence': None},
'usage': {'output_tokens': 12},
})
yield create_event('message_stop', {'type': 'message_stop'})
log_request(request, 200)
@socket.on('query_progress')
def on_query_progress(data):
if data.get('text'):
text = json.loads(data['text'])
chunk = text['chunks'][-1]
if chunk:
yield create_event('content_block_delta', {
'type': 'content_block_delta',
'index': 0,
'delta': {'type': 'text_delta', 'text': chunk},
})
@socket.on('disconnect')
def on_disconnect():
logging.info(' > [Disconnected]')
@socket.on('error')
def on_error(error):
yield create_event('content_block_delta', {
'type': 'content_block_delta',
'index': 0,
'delta': {'type': 'text_delta', 'text': 'Error occured while fetching output 输出时出现错误\nPlease refer to the log for more information 请查看日志以获取更多信息'},
})
yield create_event('content_block_stop', {'type': 'content_block_stop', 'index': 0})
yield create_event('message_delta', {
'type': 'message_delta',
'delta': {'stop_reason': 'end_turn', 'stop_sequence': None},
'usage': {'output_tokens': 12},
})
yield create_event('message_stop', {'type': 'message_stop'})
logging.error(error)
log_request(request, 500)
@socket.on('connect_error')
def on_connect_error(error):
yield create_event('content_block_delta', {
'type': 'content_block_delta',
'index': 0,
'delta': {'type': 'text_delta', 'text': 'Failed to connect to the Perplexity.ai 连接到Perplexity失败\nPlease refer to the log for more information 请查看日志以获取更多信息'},
})
yield create_event('content_block_stop', {'type': 'content_block_stop', 'index': 0})
yield create_event('message_delta', {
'type': 'message_delta',
'delta': {'stop_reason': 'end_turn', 'stop_sequence': None},
'usage': {'output_tokens': 12},
})
yield create_event('message_stop', {'type': 'message_stop'})
logging.error(error)
log_request(request, 500)
@socket.on('close')
def on_close():
logging.info(' > [Client closed]')
socket.disconnect()
except Exception as e:
logging.error(e)
yield create_event('content_block_delta', {
'type': 'content_block_delta',
'index': 0,
'delta': {'type': 'text_delta', 'text': 'Error occured while fetching output 输出时出现错误\nPlease refer to the log for more information 请查看日志以获取更多信息'},
})
yield create_event('content_block_stop', {'type': 'content_block_stop', 'index': 0})
yield create_event('message_delta', {
'type': 'message_delta',
'delta': {'stop_reason': 'end_turn', 'stop_sequence': None},
'usage': {'output_tokens': 12},
})
yield create_event('message_stop', {'type': 'message_stop'})
log_request(request, 500)
return Response(generate(), mimetype='text/event-stream')
else:
raise ValueError('Invalid request')
except Exception as e:
logging.error(e)
return jsonify({'error': str(e)}), 400
# 处理其他路由
@app.errorhandler(404)
def not_found(e):
log_request(request, 404)
return 'Not Found', 404
# 错误处理中间件
@app.errorhandler(500)
def internal_server_error(e):
logging.error(e)
log_request(request, 500)
return 'Something broke!', 500
if __name__ == '__main__':
port = int(os.getenv('PORT', 8081))
logging.info(f'Perplexity proxy listening on port {port}')
if not API_KEY:
logging.warning('Warning: PPLX_KEY environment variable is not set. API key validation will fail.')
socketio.run(app, port=port, allow_unsafe_werkzeug=True)
# eventStream util
def create_event(event, data):
if isinstance(data, dict):
data = json.dumps(data)
return f'event: {event}\ndata: {data}\n\n' |