python之requests实现多表单请求

一、multipart/form-data简单介绍

http的多表单提交时post请求一种，

1、需要再http request header里面设置Content-Type:multipart/form-data; boundary=---------------thisisboundaryfortest

multipart/form-data 此类型告诉服务端，请求是一个多表单的

boundary 为分割字符串

2、multipart/form-data 制定数据的为二进制类型，对于图片、音频更高效

3、报个格式样例

--${bound}

Content-Disposition: form-data; name="test1"

"my name is test1"

--${bound}

Content-Disposition: form-data; name="test2"

"my name is test2"

--${bound}--

2、发起多表单请求，都是字符串

payload = (('test1', 'value1'), ('test2', 'value2'))
r = requests.post('http://0.0.0.0:7778', data=payload)

3、字符串和文件混合

url = "http://0.0.0.0:7777/upload"
filepath = "/Users/tao.zhang/Downloads/493196591beef5c3e073c9e985e123b4.jpg"
data = {"city_id": "355"}
files = {"uploaded_file": open(filepath, "rb")}

r = requests.post(url, data=data, files=files)

4、html表单发起

 <!doctype html>
<html>
<body>
<form action='/upload' method='post' enctype='multipart/form-data'>
   <input type='file' name='uploaded_file'>
   <select name="city_id">
   <option value="379">天津</option>
   <option value="33">北京</option>
   <option value="355"  selected="selected">石家庄</option>
   <option value="376">唐山</option>
  </select>
   <input type='submit' value='Upload'>
</form>

5、用flask简单写了一个服务端

import flask

app = flask.Flask(__name__)

@app.route('/', methods=['GET', 'POST'])
def test3():
    print flask.request.form.get("test1")
    print flask.request.form.get("test2")
    return "test3"

if __name__=="__main__":
    app.run(host="0.0.0.0", port=7778)

python之requests实现多表单请求

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