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.

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. — Martijn Pieters
– Martijn Pieters, Commented Oct 11, 2015 at 7:26
I'm sorry. I missed a line of code. It is corrected to show my code now. — BearBonesHacker
– BearBonesHacker, Commented Oct 11, 2015 at 7:38

Daniel · Accepted Answer · 2015-10-11 07:51:19Z

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()

edited Oct 11, 2015 at 7:51

answered Oct 11, 2015 at 7:40

Daniel

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1 Comment

BearBonesHacker Over a year ago

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."

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