HTTP.post() Exceptions.StatusError(400, ...)

New to Julia
1

I’m trying to code the following Python code in Julia:

import requests

# Define the API endpoint URL
url = 'https://example.com/create/'
# Define your API credentials
username = 'john.smith@example.com'
api_key = '1234'

# Define the request headers
headers = {
    'authorization': f'ApiKey {username}:{api_key}',
    'content-type': 'multipart/form-data; boundary=----WebKitFormBoundary2AegpCQ',
}

# Define the request data payload
data = {
    'format': '0', # 0 for CSV
    'data_source': '15',
    'end_date': '1699506000000', # Start time timestamp in milliseconds
    'start_date': '1698811200000', # End time timestamp in milliseconds
    'participant_ids': '123,45678,90123,4567,8901,2345', # List of participant IDs
    'site_ssid': 'null',
    'study_id': '1234', # Study ID
}
 
# Send the POST request

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

This is what I have as the Julia code:

using HTTP

# Define the API endpoint URL
url = "https://example.com/create/"

# Define your API credentials
username = "john.smith@example.com"
api_key = "1234"

# Define the request headers
headers = Dict(
    "Authorization" => "ApiKey $username:$api_key",
    "Content-Type" => "multipart/form-data; boundary=----WebKitFormBoundary2AegpCQ"
)

# Define the request data payload
data = Dict(
    "format"=> "0", # 0 for CSV
    "data_source"=> "15", # 15 for GPS and 16 for Battery
    "end_date"=> "1699506000000", # Start time timestamp in milliseconds
    "start_date"=> "1698811200000", # End time timestamp in milliseconds
    "participant_ids"=> "123,45678,90123,4567,8901,2345", # List of participant IDs
    "site_ssid"=> "null",
    "study_id"=> "1234" # Study ID
)

# Send the POST request
response = HTTP.request("POST", url, headers, data)

It works fine in Python, but in Julia, I get the error, HTTP.Exceptions.StatusError(400, "POST",...

I have tried writing headers and data as Vector{Pair} , which gives me the error, HTTP.RequestError:ERROR: TaskFailedException.

I have tried using HTTP.Form() around the headers and data variables, but that also gives an error.

Does anyone know what I’m doing wrong?

2

The link that you are trying to open does not exist as ERROR code is 400.

3

I did not write the actual link for security purposes. The link works if I use Python.
This is a description of the 400 error: “The HyperText Transfer Protocol (HTTP) 400 Bad Request response status code indicates that the server cannot or will not process the request due to something that is perceived to be a client error (for example, malformed request syntax, invalid request message framing, or deceptive request routing).”
Is there anything wrong with my code that fits the above description?

4

Did you try to use API Reference · HTTP.jl? HTTP.jl should automatically handle the content type header in this case.

You can also try the suggestion from https://discourse.julialang.org/t/http-post-xml-request-with-headers-and-authentification/61026/2 to compare the two (Python and Julia).