Python之Headers value 1 must be of type str or bytes, not <class 'int'>错误的解决

来源：互联网发布：8月外贸数据编辑：程序博客网时间：2024/06/05 06:23

1. 问题的提出

在代码中，忽然碰到了如下错误：

'2017-04-25 13:15:13 PM' HttpUtil.py[line:30] ERROR HttpUtil:Header value 1 must be of type str or bytes, not <class 'int'>

使用的代码如下：

 response = requests.get(url, headers=headers, cookies=cookies)

主体的代码是使用requests进行Http的页面调用访问。

引入import traceback来打印错误信息，在异常捕获部分添加traceback的打印语句：

traceback.print_exc()

其将详细的异常栈打印到控制台上去。

Traceback (most recent call last):  File "/usr/local/python3/lib/python3.6/multiprocessing/process.py", line 249, in _bootstrap    self.run()  File "/usr/local/python3/lib/python3.6/multiprocessing/process.py", line 93, in run    self._target(*self._args, **self._kwargs)  File "/opt/crawler/web-crawler/dyproxy/IPProxyPool/spider/ProxyCrawl.py", line 34, in startProxyCrawl    crawl.run()  File "/opt/crawler/web-crawler/dyproxy/IPProxyPool/spider/ProxyCrawl.py", line 49, in run    parserList = self.urltaker.parse_list()  File "/opt/crawler/web-crawler/dyproxy/IPProxyPool/spider/urls/URLRetriever.py", line 35, in parse_list    site_config['urls'] = getattr(self, 'retrieve_' + site.xpath("@name")[0])(site.xpath("@url")[0], site.xpath('./setting/@url')[0])  File "/opt/crawler/web-crawler/dyproxy/IPProxyPool/spider/urls/URLRetriever.py", line 110, in retrieve_mimiip    response = HttpUtil.get(site_url % proxy, headers=all_headers['mimiip'])  File "/opt/crawler/web-crawler/dyproxy/IPProxyPool/util/HttpUtil.py", line 31, in get    traceback.print_exc()  File "/usr/local/python3/lib/python3.6/traceback.py", line 159, in print_exc    print_exception(*sys.exc_info(), limit=limit, file=file, chain=chain)  File "/usr/local/python3/lib/python3.6/traceback.py", line 101, in print_exception    print(line, file=file, end="")

基本确定就是headers或者cookies的问题。

2. 问题分析

基于错误信息，感觉是headers中的数据类型问题，期望string，但是实际上是int类型。经过检查发现是在自定义的header中：

"mimiip": {       "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8",       "Accept-Encoding":"gzip, deflate",       "Accept-Language":"zh-CN,zh;q=0.8,de;q=0.6,en;q=0.4,zh-TW;q=0.2",       "Cache-Control":"Max-Age=0",       "Connection":"keep-alive",       "DNT":1,       "Host":"www.mimiip.com",       "Referer":"http://www.mimiip.com/gngao/",       "If-None-Match":"169bceb52ed4a052e3b0f82bda5b0462",       "Upgrade-Insecure-Requests"：1,       "User-Agent":"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3063.4 Safari/537.36"   }

其中使用了两个数字类型的，估计应该是这个位置的问题。
3. 问题解决

将上述中的int类型的数据，修改为string类型，则可以正常访问。

4. 总结

在Http请求中，所有的都是字符串，没有数字类型的，尤其是在构建的请求中，请注意这个问题。

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