Send Notifications using OneSignal

Question

Hi,

How can I send notifications using OneSignal and HttpClient?

From the below link:

https://documentation.onesignal.com/reference/create-notification#example-code---create-notification

I tried this code but did not work:

var client = new HttpClient();

client.BaseAddress = new Uri("https://onesignal.com/api/v1/notifications");
client.DefaultRequestHeaders.Add("authorization", "Basic " + onesignalUserAuth);

var content = new FormUrlEncodedContent(new[]
{
    new KeyValuePair<string, string>("app_id", SecureStorage.GetAsync("AppID").Result),
    new KeyValuePair<string, string>("contents[en]", EditorMessage.Text.Trim()),
    new KeyValuePair<string, string>("included_segments", "All")
});

var response = await client.PostAsync("https://onesignal.com/api/v1/notifications", content);

Kindly help..

Thanks,
Jassim

Answer 1

It looks like that endpoint accepts JSON rather than form-urlencoded content. If you try this instead does it work?:

var client = new HttpClient();

client.BaseAddress = new Uri("https://onesignal.com/api/v1/notifications");
client.DefaultRequestHeaders.Add("authorization", "Basic " + onesignalUserAuth);
client.DefaultRequestHeaders.Add("Content-Type", "application/json");

var content = new StringContent(JsonSerializer.Serialize(new {
    app_id = SecureStorage.GetAsync("AppID").Result,
    contents = new {
        en = EditorMessage.Text.Trim()
    },
    included_segments = "All"
}));

var response = await client.PostAsync("https://onesignal.com/api/v1/notifications", content);