Python HTTP Post，其中包含从Postman生成的上传文件和标头

Question

I'm using Python 2.7 .

I want to make a HTTP POST using requests , where I upload a file and a key that must go in the HTTP Headers .

For that I've used the application Postman , where it works really fine.

On Postman I've added only the necessary header, which is a Authorization with some key. On the body , Ive choosen form-data and then the key is an input_image , and they the image itself.

Now I want to replicate this into Python2.7 , so I've chose to see the Python code on Postman , which was this one:

import requests

url = "https://foo.com/bar/stuff"

payload = "------WebKitFormBoundary7MA4YDxkTrZu1gW\r\nContent-Disposition: form-data; name=\"input_image\"; filename=\"C:\\Test\\projs\\Supermarket\\doritos.jpeg\"\r\nContent-Type: image/jpeg\r\n\r\n\r\n------WebKitFormBoundary7MA4YDxkTrZu1gW--"
headers = {
    'content-type': "multipart/form-data; boundary=----WebKitFormBoundary7MA4YDxkTrZu1gW",
    'Authorization': "myAuthorizationKey",
    'Cache-Control': "no-cache",
    'Postman-Token': "0efwd6e8-051c-4ed5-8d6f-7b1bd135f4d5"
    }

response = requests.request("POST", url, data=payload, headers=headers)

print(response.text)

This simply doesn't work. It has the same behaviour as if I didn't send any image using Postman . It looks like the payload string is not being send correctly.

Question:

What is wrong with this Postman auto-generation code in order to send a HTTP POST with image upload and with header at the same time in Python ?

Answer 1

I think Postman is doing some logic we are not really aware of. But the package requests provide a way to upload images.

files = {'media': open('my_image.jpg', 'rb')}
r = requests.post(url, files=files, headers=hearders)

According to the server you are sending the image to, the parameters name, this code might need to be slightly changed.

Answer 2

the only trick works here is your code should be same as you post request in postman, no extra headers need to be added , your post request should look like the same as it is in postman. I could do this by changing my file to an image file and then posting it in my post request.

    with open('grass-small.png', 'rb') as imageFile:
        imageStr = base64.urlsafe_b64encode(imageFile.read())
    files = {'document': ('grass-small.png', imageStr ), 'document_type':(None,'grass')}

Answer 3

This worked for me

import requests

url = 'http://iizuka.cs.tsukuba.ac.jp/projects/colorization/web/'
files = {'file': ("my_img_path/myImage.jpeg", open('my_img_path/myImage.jpeg', 'rb'),'image/jpg')}

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