Python 2和Python 3上的请求库崩溃

2024-04-19 20:06:03 发布

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我试图用以下代码解析带有requestsBeautifulSoup库的任意网页:

try:
    response = requests.get(url)
except Exception as error:
    return False

if response.encoding == None:
    soup = bs4.BeautifulSoup(response.text) # This is line 809
else:
    soup = bs4.BeautifulSoup(response.text, from_encoding=response.encoding)

在大多数网页上,这一切都很好。但是,在一些任意页面上(<;1%)我会遇到这样的崩溃:

^{pr2}$

作为参考,以下是请求库的相关方法:

@property
def text(self):
    """Content of the response, in unicode.

    if Response.encoding is None and chardet module is available, encoding
    will be guessed.
    """

    # Try charset from content-type
    content = None
    encoding = self.encoding

    # Fallback to auto-detected encoding.
    if self.encoding is None:
        if chardet is not None:
            encoding = chardet.detect(self.content)['encoding']

    # Decode unicode from given encoding.
    try:
        content = str(self.content, encoding, errors='replace') # This is line 809
    except LookupError:
        # A LookupError is raised if the encoding was not found which could
        # indicate a misspelling or similar mistake.
        #
        # So we try blindly encoding.
        content = str(self.content, errors='replace')

    return content

可以看出,当抛出这个错误时,我并没有传递编码。如何不正确地使用库?如何防止此错误?这是在python3.2.3上实现的,但是我也可以在python2中得到相同的结果。在


Tags: textfromselfnone网页ifisresponse
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1楼 · 发布于 2024-04-19 20:06:03

这意味着服务器没有为标头中的内容发送编码,chardet库也无法确定内容的编码。实际上,您故意测试是否缺少编码;如果没有可用的编码,为什么要尝试获取解码文本?在

您可以尝试将解码留给BeautifulSoup解析器:

if response.encoding is None:
   soup = bs4.BeautifulSoup(response.content)

而且需要将编码传递给BeautifulSoup,因为如果.text没有失败,那么您使用的是Unicode,beautifulGroup无论如何都会忽略编码参数:

^{pr2}$

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