Failing to use the Jira API to add attachments to an existing Jira issue

[Ron Barak]

I'm trying to add attachments to an existing Jira issue — using the Jira API.

I followed the API documentation, but still, I get error 415 from Jira.
Any suggestions on what I may be doing wrong:

$ python3 add_attachment_to_jira_ticket_for_SO.py attachment_contents = b'This is a sample attachment, to test attachments in Jira.\n'
Error adding attachment: status code 415 ('')

This is my script (running on Python 3.4.10):

$ cat add_attachment_to_jira_ticket_for_SO.py
"""
Add attachment to an existing Jira ticket
"""

from authorisation import auth
import json
import requests


def get_json_config_data(json_config_path):
with open(json_config_path) as json_data:
dict_data = json.load(json_data)
headers = dict_data["headers"]

return headers


def add_attachment_to_jira(headers, auth, issue_key, files):
jira_api_endpoint = 'https://corp.atlassian.net/rest/api/2/issue/{issue_key}/attachments'.format(issue_key=issue_key)

response = requests.post(
jira_api_endpoint,
headers=headers,
auth=auth,
files=files,)

if response.status_code == 200:
print('Attachment added successfully!')
else:
print("Error adding attachment: status code {status_code} ('{text}')".format(status_code=response.status_code, text=response.text))


if __name__ == "__main__":
json_config_path = "json_data.json"
headers = get_json_config_data(json_config_path)

# set the issue key and comment text
issue_key = 'ONSIP-261'

file_path = "./sample_attachment_SO.txt"
file_name = "sample_attachment_SO.txt"

with open(file_path, "rb") as f:
attachment_contents = f.read()
print("attachment_contents =",attachment_contents)

files = {
"file": (file_name, attachment_contents, "application-type"),
}

# set the headers and data for the Jira API request
json_config_path = "json_data.json"
headers = get_json_config_data(json_config_path)

add_attachment_to_jira(headers, auth, issue_key, files=files)

[Ron Barak]

Thanks for the pointer, @Nicolas Grossi

However, my problem was in a wrong "Content-Type" in my headers. Once I fixed that, I was able to upload attachments to Jira with the API.