如何将布尔正文发送到 HttpClient.PutAsync 或 HttpClient.PostAsync？

Question

I am trying to invoke a PUT service that accepts a single boolean value as a body. The service works when I test it from Javascript or Swagger, but it rejects my request from .NET.

This works (Javascript):

fetch(URL, {
    headers: {
        'Content-Type': 'application/json',
        'Authorization': `bearer ${TOKEN}`
    },
    method: 'PUT',
    body: true,
});

This does not work (.NET):

private static async Task<string> RunTest(bool b)
{
    using (var client = new HttpClient())
    {
        client.DefaultRequestHeaders.Add("Authorization", $"Bearer {TOKEN}");
        var content = new StringContent(b.ToString(), Encoding.UTF8, "application/json");
        HttpResponseMessage result = await client.PutAsync(URL, content);
        return result.ToString();
    }
}

The server is returning a 400 for my .NET request. But as I said, it works when I test using fetch or other ways. So I assume I am doing something wrong in .NET.

How can I pass a boolean body to HttpClient.PutAsync ?

Answer 1

As @Nkosi suggested in the comments, I needed to serialize the boolean to JSON instead of just calling ToString .

The problem appears to be that ToString produces upper-case values of True or False , instead of the expected lower-case values of true or false .

So I added a reference to Json.NET and changed the code to this:

private static async Task<string> RunTest(bool b)
{
    using (var client = new HttpClient())
    {
        client.DefaultRequestHeaders.Add("Authorization", $"Bearer {TOKEN}");
        var content = new StringContent(JsonConvert.SerializeObject(b), Encoding.UTF8, "application/json");
        HttpResponseMessage result = await client.PutAsync(URL, content);
        return result.ToString();
    }
}

This works.