由“for chunk in response.iter_content(1024)”引发的StreamConsumedError()异常

时间:2017-07-28 18:12:58

标签: python python-2.7 exception python-requests

我不完全确定提出这个问题的最佳方式是什么,

但是我正在编写一个脚本,使用request.get()从互联网上下载一些内容,一切正常,但由于某种原因现在出现了StreamConsumedError(),我不知道为什么。< / p>

Traceback (most recent call last):
File "./pythonDL-ver_0.0.4.py", line 90, in <module>
for chunk in response.iter_content(1024):
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/requests/models.py", line 766, in iter_content
raise StreamConsumedError()
requests.exceptions.StreamConsumedError

如果您需要更多信息,我可以将其添加进去。谢谢。

while True:
    count = count + 1
    print 'testing ' + str(count) + '\n'
    print url
    url_2 = url.format(count = count)
    print '////' + str(url_2) + ' for loop ' + str(count) + "////\n"


    print str(url_2) + ' testing url \n'

    filename = posixpath.basename(url_2)
    print str(filename) + ' testing filename \n'
    response = requests.get(url_2, stream = True)
    responseString = str(response)

    print str(responseString) + 'testing res2 \n'

    if responseString == '<Response [404]>':
        print '......No more Requests......\n'
        break
    elif responseString == '<Response [200]>':
        print '......Successful Request....\n'
    else:
        break

    print responseString

    while responseString == '<Response [200]>':
        print 'testing while loop: ' + str(responseString)
        with open(filename, 'wb') as fp:
            for chunk in response.iter_content(1024):
                fp.write(chunk)

    count += 1
    print str(count) + ' = counting value'

这是事情停止工作的循环。

1 个答案:

答案 0 :(得分:1)

    while responseString == '<Response [200]>':
        print 'testing while loop: ' + str(responseString)
        with open(filename, 'wb') as fp:
            for chunk in response.iter_content(1024):
                fp.write(chunk)

此循环永远不会终止,一旦responseString<Response [200]>,它就会永远停留,因为没有任何改变。

阻止循环永远存在的唯一因素是您可以多次从流式响应中读取。所以当循环再次尝试时,响应会抛出错误。

最简单的解决方法是将while替换为if

    if responseString == '<Response [200]>':
        with open(filename, 'wb') as fp:
            for chunk in response.iter_content(1024):
                fp.write(chunk)