Azure Computer Vision - OCR API - Bad or unrecognizable request JSON or binary file

Question

Hello,

I am trying to use Azure OCR from python. I created an instance of the 'Cognitive Services | Computer vision' and I have my endpoint URL and keys.

It works well when I use it from postman but when I try to run it from python I get the following error:

b'{"error":{"code":"BadArgument","message":"Bad or unrecognizable request JSON or binary file."}}'

My code is the following:

import cv2, json, base64
import http.client, urllib.request, urllib.parse, urllib.error

headers = {
    'Content-Type': 'application/octet-stream',
    'Ocp-Apim-Subscription-Key': 'XXX',
}

params = urllib.parse.urlencode({
    'language': 'ar',
    'pages': 'all',
    # 'readingOrder': '{string}',
    # 'model-version': '{string}',
})

try:
    conn = http.client.HTTPSConnection('YYY.cognitiveservices.azure.com')

    with open("C:/Users/User/Downloads/Old/Numbers+LettersArabic.jpg", "rb") as image_file:
        body = base64.b64encode(image_file.read())
        body = '{body}'

    conn.request("POST", "/vision/v3.2/read/analyze?%s" % params, body, headers)
    response = conn.getresponse()
    data = response.read()
    print(data)
    conn.close()
except Exception as e:
    print("[Errno {0}] {1}".format(e.errno, e.strerror))

Answer 1

@Ammar Mohanna I think the body is not passed correctly in the above case. Try this snippet and it should provide you with the operation location that can be used to get the end result of the analyze operation using Read Result API.

import  json, base64
import http.client, urllib.request, urllib.parse, urllib.error

headers = {
    'Content-Type': 'application/octet-stream',
    'Ocp-Apim-Subscription-Key': 'key',
}

params = urllib.parse.urlencode({
    'language': 'en',
    'pages': 'all',
    # 'readingOrder': '{string}',
    # 'model-version': '{string}',
})


with open("C:\\Users\\user\\Pictures\\image.jpg", "rb") as image_file:
    body = image_file.read()

try:
    conn = http.client.HTTPSConnection('your_region.cognitiveservices.azure.com')
    conn.request("POST", "/vision/v3.2/read/analyze?%s" % params, body, headers)
    response = conn.getresponse()
    #data = response.read()
    print(response.headers)
    conn.close()
except Exception as e:
    print("[Errno {0}] {1}".format(e.errno, e.strerror))

Response: