网上好多代码都是抄袭的，也有一些BUG，例如在3.6 做proxy 请求shell会404

解决如下：

• 原因获取headers中有host，直接带入requests headers，导致host不一致需要删除
• 支持GET请求转发
• 解决content-length

# -*- coding: utf8 -*-
import requests
import json


def geturl(urlstr):
    jurlstr = json.dumps(urlstr)
    dict_url = json.loads(jurlstr)
    return dict_url['u']

def send_post(event):
    """
    POST 代理
    """
    url = geturl(event['queryString'])
    data = event['body']
    headers = event['headers']
    del headers['host']
    del headers['content-length']
    headers['user-agent'] = "Mozilla/5.0 (Linux; U; Android 4.1.2; zh-cn; GT-I9300 Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 MicroMessenger/5.2.380"
    resp = requests.post(url=url, data=data, headers=headers, verify=False)
    response={
        "isBase64Encoded": False,
        "statusCode": 200,
        "headers": {'Content-Type': 'text/html;charset='+resp.apparent_encoding},
        "body": resp.text,
    }
    return response

def send_get(event):
    """
    GET 请求
    """
    url = geturl(event['queryString'])
    headers = event['headers']
    del headers['host']
    # del headers['content-length']
    headers['user-agent'] = "Mozilla/5.0 (Linux; U; Android 4.1.2; zh-cn; GT-I9300 Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 MicroMessenger/5.2.380"
    resp = requests.get(url=url, headers=headers, verify=False)
    response={
        "isBase64Encoded": False,
        "statusCode": 200,
        "headers": {'Content-Type': 'text/html;charset='+resp.apparent_encoding},
        "body": resp.text,
    }
    return response

def main_handler(event, context):
    try:
        if event['httpMethod'] == "POST":
            return send_post(event)
        if event['httpMethod'] == "GET":
            return send_get(event)
    except Exception as e:
        response = {
        "isBase64Encoded": False,
        "statusCode": 200,
        "headers": {'Content-Type': 'text/html;charset='},
        "body": str(e)
        }
        return response