C＃Asana POST新任务返回错误400（错误请求）

Question

I have a problem with creating new task in Asana from my app.

Post method:

protected static T Post<T>(string route, object action = null, object parameters = null) where T : BaseResult, new()
    {
        var result = new T();

        try
        {
            var actionUrl             = GetActionUrl(route, action);
            var request               = (HttpWebRequest)WebRequest.Create(actionUrl);
            request.Credentials       = CredentialCache.DefaultCredentials;
            request.Accept            = "application/json";
            request.Method            = WebRequestMethods.Http.Post;
            request.Proxy.Credentials = CredentialCache.DefaultCredentials;
            request.Headers.Add("Authorization: Bearer " + ApiKey);

            if (parameters != null)
            {
                var contentJSON       = JsonConvert.SerializeObject(parameters);
                request.ContentType   = "application/json";

                using (var s = request.GetRequestStream())
                    using (var sw = new StreamWriter(s, Encoding.UTF8))
                        sw.Write(contentJSON);
            }

            var response = (HttpWebResponse) request.GetResponse();

            using (var reader = new StreamReader(response.GetResponseStream()))
            {
                var data = reader.ReadToEnd();
                result   = JsonConvert.DeserializeObject<T>(data);
            }
        }
        catch (Exception ex)
        {
            result.IsOk    = false;
            result.Message = ex.GetMessage();
        }

        return result;
    }

Action URL: https://app.asana.com/api/1.0/workspaces/ MyWorkspace /tasks JSON: {"data":{"name":"TestTask1","notes":"Test note","workspace":"*MyWorkspace*","assignee":"*MyAssignee"}}

But Asana returns me "The remote server returned an error: (400) Bad Request."

If I change request.ContentType to "application/x-www-form-urlencoded", I get no errors, but Asana returns me new task with empty fields.

What my next steps to fix issue should be?

Thank you

Answer 1

If you're using an ApiKey (and not a Personal Access Token), I believe that your Authorization Header should be

"Authorization: Basic " + EncodedAuthInfo

where

EncodedAuthInfo = Convert.ToBase64String(Encoding.Default.GetBytes(ApiKey + ":"))

See How do I connect to the Asana Rest API using c#? or the Using Basic Authentication section in https://asana.com/developers/documentation/getting-started/auth for details on using basic authentication.

I'm also a little confused by what you mean when you say that

JSON = {"data": {"name": "TestTask1"} ...

Is this the HTTP response that you expect?

Anyways, hopefully what I've outlined helps.

Answer 2

Hmm. I think I've got what's blocking you sorted out.

Imagine the scenario where you post to

https://app.asana.com/api/1.0/workspaces/123456/tasks

and you pass in the request body the parameter

"workspace":"789012"

What should the Asana platform do with this data? You've inadvertently specified the workspace twice with conflicting numbers. For this reason, you cannot specify the workspace id in the data when hitting an endpoint which also contains the workspace id in the URL .

The documentation is confusing on this point, because we don't clarify which parameters are found in the URL and which parameters are found in the JSON in the request body. I'm actually fixing this very soon! If this is indeed what's causing the issue, I'm sorry that we were not clear on this.

Personally, I think it might be a better user experience to allow the workspace to be duplicated in the parameter data if and only if it's identical to the one in the URL, but right now, we simply check to see that there is only one value for the workspace id. If there are more than one, even if they are the same one, we return the 400 error code.

You might consider parsing the response body, even on errors. In it, we try to provide fairly decent information about what was wrong about the request. For example, when testing my hunch about your request, what I got back was:

"errors":[{"message":"Duplicate field: workspace", ...}]

If we've done a good job about sending back informative messages, I hope you'll find this even more useful than an Asana sandbox! If this is not the issue, feel free to comment; I'll be happy to dive into this further.