python - 从 gmail API 获取正确的电子邮件编码

Answer 1

The headers

'headers': [{'name': 'Content-Type', 'value': 'text/html; charset="UTF-8"'},
  {'name': 'Content-Transfer-Encoding', 'value': 'quoted-printable'}]

are telling you that the message consists of text encoded as UTF-8, then quoted-printable encoded so that it can be processed by systems that only support 7-bit characters.

To decode, you need to decode from quoted-printable first, and then decode the resulting bytes from UTF-8.

Something like this ought to work:

utf8 = quopri.decodestring(htmlpart)
text = ut8.decode('utf-8')

HTML email bodies may contain character entities. These can be converted to individual characters using html.unescape (available in Python 3.4+).

>>> import html 
>>> h = """</tr><tr><td class="m_4364729876101169671Uber18_text_p1" align="left" style="color:rgb(0,0,0);font-family:&#39;Uber18-text-Regular&#39;,&#39;HelveticaNeue-Light&#39;,&#39;Helvetica Neue Light&#39;,Helvetica,Arial,sans-serif;font-size:16px;line-height:28px;direction:ltr;text-align:left"> Give friends free ride credit to try Uber. You&#39;ll get CN¥10 off each of your next 3 rides when they start riding. <span class="m_4364729876101169671Uber18_text_p1" style="color:#000000;font-family:&#39;Uber18-text-Regular&#39;,&#39;HelveticaNeue-Light&#39;,&#39;Helvetica Neue Light&#39;,Helvetica,Arial,sans-serif;font-size:16px;line-height:28px">Share code: 20ccv</span></td>"""


>>> print(html.unescape(h))
</tr><tr><td class="m_4364729876101169671Uber18_text_p1" align="left" style="color:rgb(0,0,0);font-family:'Uber18-text-Regular','HelveticaNeue-Light','Helvetica Neue Light',Helvetica,Arial,sans-serif;font-size:16px;line-height:28px;direction:ltr;text-align:left"> Give friends free ride credit to try Uber. You'll get CN¥10 off each of your next 3 rides when they start riding. <span class="m_4364729876101169671Uber18_text_p1" style="color:#000000;font-family:'Uber18-text-Regular','HelveticaNeue-Light','Helvetica Neue Light',Helvetica,Arial,sans-serif;font-size:16px;line-height:28px">Share code: 20ccv</span></td>