CODEWITHSUNDEEP
c#restapimarketo
Jim
Jim

Reputation: 117

Getting Invalid Content Type doing a Delete httpclient call. What am I doing wrong?

When I try to do the code below, it just results in Invalid Content Type (with error number 612).

I'm trying to delete a lead id from a static list. I can add lead ids or get the static list leads fine.

The post and get calls I make are working fine, although the post calls I make seem to require the data right on the url string (as in $"{endpointURL}/rest/v1/lists/{listID}/leads.json?id={leadID}"; If I include the id as a json object, it fails too. This might be a clue to what I'm doing wrong with the delete call.

string url = $"{endpointURL}/rest/v1/lists/{listID}/leads.json?id={leadID}";
HttpClient client = new HttpClient();
client.BaseAddress = new Uri(url);
client.DefaultRequestHeaders.Authorization = new 
AuthenticationHeaderValue("Bearer", _access_token);
HttpResponseMessage response = await client.DeleteAsync(url);

The response here always results in Invalid Content Type.

If I add this line before I do the deleteasync call, it gives me a different error before it even hits the deleteAsync call.

client.DefaultRequestHeaders.Add("Content-Type", "application/json");

Error is "Misused header name. Make sure request headers are used with HttpRequestMessage, response headers with HttpResponseMessage, and content headers with HttpContent objects."

Upvotes: -1

Views: 1716

Answers (2)

Jim
Jim

Reputation: 117

The solution turned out to be a combination of a couple of suggestions.

HttpClient client = new HttpClient();
client.BaseAddress = new Uri(url);

HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Delete, data);
// The key part was the line below
request.Content = new StringContent(string.Empty, Encoding.UTF8, "application/json");

if (!string.IsNullOrEmpty(_access_token))
{
    client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", _access_token);
}

HttpResponseMessage response = await client.SendAsync(request);

This worked for me.

Upvotes: 0

jPhizzle
jPhizzle

Reputation: 497

Try using HttpRequestMessage in your code like this

string url = $"{endpointURL}/rest/";
HttpClient client = new HttpClient
{
    BaseAddress = new Uri(url)
};

//I'm assuming you have leadID as an int parameter in the method signature
Dictionary<string, int> jsonValues = new Dictionary<string, int>();
jsonValues.Add("id", leadID);

//create an instance of an HttpRequestMessage() and pass in the api end route and HttpMethod
//along with the headers
HttpRequestMessage request = new HttpRequestMessage
    (HttpMethod.Delete, $"v1/lists/{listID}") //<--I had to remove the leads.json part of the route... instead I'm going to take a leap of faith and hit this end point with the HttpMethod Delete and pass in a Id key value pair and encode it as application/json
    {
        Content = new StringContent(new JavaScriptSerializer().Serialize(jsonValues), Encoding.UTF8, "application/json")
    };

request.Headers.Add("Bearer", _access_token);

//since we've already told the request what type of httpmethod we're using 
//(in this case: HttpDelete)
//we could just use SendAsync and pass in the request as the argument
HttpResponseMessage response = await client.SendAsync(request);

Upvotes: 0

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