Azure Devops 上传图片

Question

I am importing a lot of data into Azure Devops using python. I have all the pieces working. I can upload images, my issue is when I download the image from the Devops website it is not a valid file. I will share my image upload code.

def convertAttachmentToJsonBinary(attachmentPath):
    file = open(attachmentPath, 'rb')
    file_data = file.read()
    encoded_data = base64.b64encode(file_data)
    decoded_data = encoded_data.decode()
    data = "[" + decoded_data + "]"
    return data


def patchWorkItemWithAttachment(case_id, att_id, att_url):
    json_template = open("attachment.json", "r")
    json_data = json.load(json_template)
    json_data[0]['value']['url'] = att_url
    json_data[0]['value']['attributes']['comment'] = "Adding attachment"

    response = requests.patch(patch_workitem_url.replace("{id}", case_id), json=json_data, headers=headers)
    print(response.json())

While I am uploading a new case, I create the case, add attachments, then patch the newly created case with the new attachment. Again all of this work. I can see the attachment in my case online, however when I download it the file is invalid.

I have attempted to read the data as a byte array as follows:

def convertAttachmentToJsonBinary(attachmentPath):
    file = open(attachmentPath, 'rb')
    encoded_data = bytearray(file.read())

    data = "[" + str(encoded_data) + "]"
    return data

I get the same error, uploading the image works however downloading the image it is invalid.

Answer 1

I tested again and found I can't open the url returned from uploading to attachment Rest API successfully. So the image has broken when uploading.

Please try to convert image to byte array with bytearray(image_file.read()) .

Please replace the value of <>

import requests
import base64
from io import BytesIO

pat = 'xxx'
authorization = str(base64.b64encode(bytes(':'+pat, 'ascii')), 'ascii')
url = 'https://dev.azure.com/<org_name>/<image_name>/_apis/wit/attachments?fileName=<filename.bmp>&api-version=6.0'

headers = {
    'Content-Type': 'application/octet-stream', 
    'Authorization': 'Basic '+authorization
}

#upload to attachment
with open("<image_path>", "rb") as image_file:
    # base64 doesn't work well
    # encoded_data = base64.b64encode(image_file.read())
    # decoded_data = encoded_data.decode()
    # data = "[" + decoded_data + "]"
    data = bytearray(image_file.read())

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

    print(r.text)

#connect wit with attachment
......

Answer 2

 ‘Paint cannot read this file. This is not a valid bitmap file, or its format is not currently supported'.

This error is not related to the code but the image which you are downloading must be corrupted so that might be the reason why paint unable to open this image.

You can try the below mentioned things :

1. Try to Open image on Different PC .

2. Open it in Another Photo Viewer Application .

3. Run Windows Troubleshooter .

4. Try to Open image on Different PC