400 Bad Request error in c#

API and Webhooks Authentication
1

Hi i am having an issue when trying to get an access token in my program. i am using Visual Studio 2022 and this is the code i have so far:
i have blanked out the client id and client secret just for security purposes.

        HttpClient Authclient = _httpClientFactory.CreateClient();
        Authclient.BaseAddress = new Uri("https://zoom.us/oauth/authorize?response_type=code&client_id=********&redirect_uri=");

        var Authparameters = new Dictionary<string, string> { };
        var AuthencodedContent = new FormUrlEncodedContent(Authparameters);

        var Authresponse = await Authclient.PostAsync(Authclient.BaseAddress, AuthencodedContent);
        HttpResponseMessage? AuthRes = await Authclient!.PostAsync(Authclient.BaseAddress, AuthencodedContent);

        var grant_type = "Authorization Code";
        var client_id = "*********";
        var client_secret = "*******";
        var scope = "";

        var AccessToken = "";

        HttpClient client = _httpClientFactory.CreateClient();
        client.BaseAddress = new Uri("https://zoom.us/oauth/token");

        var parameters = new Dictionary<string, string> { { "grant_type", grant_type }, { "client_id", client_id }, { "client_secret", client_secret }, { "scope", scope } };
        var encodedContent = new FormUrlEncodedContent(parameters);

        var response = await client.PostAsync(client.BaseAddress, encodedContent);
        HttpResponseMessage? Res = await client!.PostAsync(client.BaseAddress, encodedContent);

i am getting an error with the final final as i am getting an error 400 Bad request.

im not sure whats wrong as i have tested all this in postman and managed to get it to work so not sure ehats causing the issue.

any help would be appreciated.

Thanks

2

For one thing, try grant_type = "authorization_code" instead of "Authorization Code"

Something about POSTing your client id and secret without encoding it seems very wrong to me; take a look at the C# example (2nd tab) on this documentation.

1 Like
3

@cletham You should have a look at ZoomNet (disclaimer: I’m the author). It’s a .NET client for Zoom’s API. The authentication process is built-in.

1 Like
4

Hi Alex

Thanks for the reply i made that change but still getting the same error unfortunately

5

Hi Jericho thanks for the reply, i had a look at your documentation and confused as i didn’t get a authorization code when i created my app if this is something you know where to find please let me know.

my app currently is just a general app not a server to server app which i think your documentation focuses on. if there’s a version that looks at general app I’m happy to use that

Thanks,
Connor

6

i didn’t get a authorization code when i created my app

When you created the app you were asked to provide the OAuth redirect URL like so:

image
image792×288 35.8 KB

When someone adds the app to their account, they get redirected to the URL you configured like so:

image
image678×109 5.34 KB

The code is right there in the URL.

7

in your documentation i don’t see a bit to get that code so are you authenticating before that code or just copying in the code into the code?

1 Like
9

That’s really up to you how you want to do it.

Presumably your redirect URL sends people to a web page that is under your control, where you can write your own code, where you can get the value from the querystring and act appropriately.