CODEWITHSUNDEEP
pythonc#asp.net-mvcasp.net-core.net-core
Jack
Jack

Reputation: 951

Http Post data from Python to net core app

I am trying to send a file from a Python script to my .net core webserver.

In Python I am doing this using the requests library, and my code looks like so.

    filePath = "run-1.csv"
    with open(filePath, "rb") as postFile:
                file_dict = {filePath: postFile}
                response = requests.post(server_path + "/batchUpload/create", files=file_dict, verify=validate_sql)
    print (response.text)

This code executes fine, and I can see the request fine in my webserver code which looks like so:

    [HttpPost]
    [Microsoft.AspNetCore.Authorization.AllowAnonymous]
    public string Create(IFormFile file) //Dictionary<string, IFormFile>
    {
                var ms = new MemoryStream();
                file.CopyTo(ms);
                var text = Encoding.ASCII.GetString(ms.ToArray());
                Debug.Print(text);
                return "s";
    }

However, the file parameter always returns as null. Also, I can see the file parameter fine when getting data posted from postMan enter image description here I suspect that this problem has to do with how .net core model binding works, but not sure... Any suggestions here on how to get my file displaying on the server?

Upvotes: 1

Views: 1541

Answers (2)

mag
mag

Reputation: 21

The example from the requests docs is mostly correct, except that the key has to match the parameter of the controller method signature.

url = 'https://www.url.com/api/post'
files = {'parameterName': open('filename.extension', 'rb')}
r = requests.post(url, files=files)

So in this case the controller action should be

[HttpPost]
public string Post(IFormFile parameterName)

Upvotes: 0

Jack
Jack

Reputation: 951

Solved my issue - the problem was that in Python I was assigning my file to my upload dictionary with the actual file name "./run1.csv" rather than a literal string "file" Updating this fixed my issue.

file_dict = {"file": postFile}

This is what I believe @nalnpir mentioned above. I figured this out by posting from postman and also from my python code to http://httpbin.org/post and comparing the respoinse

Upvotes: 1

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