HTTP POST in Python

Question

I am trying to convert a HTTP POST into Python and am not sure how to go about doing this.

I have the HTTP Request:

POST vision/v1/ocr?language=unk&detectOrientation =true
Content-Type: application/json
Host: api.projectoxford.ai
Content-Length: 95
Ocp-Apim-Subscription-Key: ••••••••••••••••••••••••••••••••
{ "Url": "exampleurl.com"}

As well as the URL request and need help on whether or not I am doing this correctly.

import urllib.parse
import urllib.request
url = "urlrequest.com"
values = {"Url":
 https://exampleurl.com}
data = url.lib.parse.urlencode(values)
data = data.encode('utf-8')
req = urllib.request.Request(url, data)
with urllib.request.urlopen(req) as response:
 the_page = response.read()

I am getting an HTTTPError:

HTTP Error 400: Bad Request.

• Daniel: req is undefined. Show correct code.
• Martijn Pieters: Your code has syntax errors, nor are you actually using data after encoding it. Please at least provide us with code that is free from syntax errors so we can determine if not using data could be the issue.
• BearBonesHacker: I'm sorry. I missed a line of code. It is corrected to show my code now.

Answer 1

You need to send JSON with additional header entries:

url = "http://api.projectoxford.ai/vision/v1/ocr?language=unk&detectOrientation=true"
data = json.dumps({'Url': 'exampleurl.com'}).encode('utf-8')
headers = {
 'Content-Type': 'application/json',
 'Ocp-Apim-Subscription-Key': '••••••••••••••••••••••••••••••••',
}
req = urllib.request.Request(url, data, headers)
with urllib.request.urlopen(req) as response:
 the_page = response.read()

• BearBonesHacker: What does the json.dumps() do? I am getting "TypeError: POST data should be bytes or an iterable of bytes. It cannot be of type str."