python 提交form-data之坑

#coding=utf-8
import requests
from requests_toolbelt import MultipartEncoder

#requests库上传
files = {"username": (None, "billy"), "password": (None, "abcd1234"),
         'picUrl': ('pic.png', open('E:/download/pic.png', 'rb'), 'image/png')}

# 如需headers，不需要赋值Content-Type,不然可能会报错
res = requests.post(url=" ", files=files)
print(res.request.headers)
#上传文件
m = MultipartEncoder(
fields={'key1': 'value1', 'key2': 'value2',
   'file': ('png_name', open('filename.png', 'rb'), 'text/plain')})
response = requests.post('http://httpbin.org/post', data=m,
     headers={'Content-Type': m.content_type})
# pip install poster

"""上述数据在requests里面可以模拟为：
files={'app_id':(None,'123456'),
    'version':(None,'2256'),
    'platform':(None,'ios'),
    'libzip':('libmsc.zip',open(r'C:\gers\danwang3\Desktop\libmsc.zip','rb'),'application/x-zip-compressed')
 }

发送上述post请求，也就是简单的

response=requests.post(url,files=files)

就这么简单

在官方网站上，requests模拟一个表单数据的格式如下：

files = {'name': (<filename>, <file object>,<content type>, <per-part headers>)}

这一行模拟出来的post数据为：

Content-Disposition: form-data; name=’name’;filename=<filename>

Content-Type: <content type>
"""