求助python大神看个代码

wanwfy

这个是百度推广API的一个示例代码，原来是python2的，有没有大神帮我看看为什么46行会报错，谢谢了

[Python] 纯文本查看 复制代码

import os
import sys
import urllib
import json
import hashlib
import hmac
import time
import datetime
from urllib.parse import quote
from urllib.parse import urlparse

def gen_auth(access_key, secret_key, utc_time_str, url, method):
    url_parse_ret = urlparse(url)
    host = url_parse_ret.hostname
    path = url_parse_ret.path
    version = "1"
    expiration_seconds = "1800"
    signature_headers = "host"

    # 1 Generate SigningKey
    val = "bce-auth-v%s/%s/%s/%s" % (version, access_key, utc_time_str, expiration_seconds)
    signing_key = hmac.new(secret_key, val, hashlib.sha256).hexdigest().encode('utf-8')

    # 2 Generate CanonicalRequest
    # 2.1 Genrate CanonicalURI
    canonical_uri = quote(path)
    # 2.2 Generate CanonicalURI: not used here
    # 2.3 Generate CanonicalHeaders: only include host here
    canonical_headers = "host:%s" % quote(host).strip()
    # 2.4 Generate CanonicalRequest
    canonical_request = "%s\n%s\n\n%s" % (method.upper(), canonical_uri, canonical_headers)

    # 3 Generate Final Signature 
    signature = hmac.new(signing_key, canonical_request, hashlib.sha256).hexdigest()
    authorization = "bce-auth-v%s/%s/%s/%s/%s/%s" % (version, access_key, utc_time_str, expiration_seconds, signature_headers, signature)
    print(authorization)
    return authorization
        
if __name__ == "__main__":
    access_key = "AK"
    secret_key = "SK"
    url = "http://sem.baidubce.com/v1/cloud/PreviewService/getPreview"
    method = "POST"
    utc_time = datetime.datetime.utcnow()
    utc_time_str = utc_time.strftime("%Y-%m-%dT%H:%M:%SZ")
    auth = gen_auth(access_key, secret_key, utc_time_str, url, method)

    header = {
        'accept-encoding':'gzip, deflate',
        'host':'sem.baidubce.com',
        'content-type':'application/json',
        'x-bce-date': utc_time_str,
        'authorization': auth,
        'accept':'*/*'
    }
    data = {"header": {"opUsername": "OPUSERNAME", "opPassword": "OPPASSWORD", "tgUsername": "TGUSERNAME", "tgPassword": "TGPASSWORD"},"body": {"keyWords": ["鲜花"],"device": 1, "region":1000}}
    data = json.dumps(data)
    request = urllib.Request(url, data, header)
    response = None
    try :
        response = urllib.urlopen(request)
        post_res_str = response.read()
        print(post_res_str)
    except urllib2.URLError as e:
        print("URLError")
        print(e.code, e.reason)
        print(e.read())
    except urllib2.HTTPError as e:
        print("HTTPError")
        print(e.code, e.reason)
        print(e.read())

我叫郭靖啊

AK，SK都要换成你自己的

离人心上秋意浓

3楼正解。。。 人家示例代码  内容都没填

广州最

建议再贴一张报错的图

wanwfy

广州最 发表于 2019-8-8 14:39
建议再贴一张报错的图

报错信息：

TypeError: key: expected bytes or bytearray, but got 'str'

主要是gen_auth函数里面不知道哪里的问题，这个代码本来是python2的，python3可能是什么地方需要改才行。

wanwfy

离人心上秋意浓 发表于 2019-8-8 14:33
3楼正解。。。 人家示例代码  内容都没填

NONONO，还没到一步就已经报错了

小屎球

URL我这里访问不了

xw0224

wanwfy 发表于 2019-8-8 14:46
报错信息：

主要是gen_auth函数里面不知道哪里的问题，这个代码本来是python2的，python3可能是什么地 ...

46行的参数必须是字节或者字节素组，不能是字符串

wanwfy

小屎球 发表于 2019-8-8 14:53
URL我这里访问不了

你必须访问不了啊，还要加参数

小屎球

wanwfy 发表于 2019-8-8 15:03
你必须访问不了啊，还要加参数

我是说 ping这个域名都没解析出IP