private static async Task <AuthenticationHeaderValue> GetAuthorizationHeader(
PowerofficeApiSettings apiSettings,
Guid clientKey)
{
using (var authenticationClient = new HttpClient())
{
authenticationClient.BaseAddress = apiSettings.AuthenticationBaseAddress;
var tokensRequest = new HttpRequestMessage(HttpMethod.Post, $"{apiSettings.AuthenticationBaseAddress}OAuth/Token");
tokensRequest.Content = new StringContent("grant_type=client_credentials", Encoding.UTF8, "application/x-www-form-urlencoded");
string encodedTokens = StringUtilities.Base64Encode($"{apiSettings.ApplicationKey}:{clientKey}");
tokensRequest.Headers.Authorization = new AuthenticationHeaderValue("Basic", encodedTokens);
var tokensResponse = await authenticationClient.SendAsync(tokensRequest);
if (!tokensResponse.IsSuccessStatusCode)
{
string responseInfo = await GetResponseInfo(tokensResponse);
throw new ApplicationException($"Could not get access token. {responseInfo}");
}
var tokens = JsonConvert.DeserializeObject <AuthorizationTokens>(await tokensResponse.Content.ReadAsStringAsync());
var authorizationHeader = new AuthenticationHeaderValue(tokens.TokenType, tokens.AccessToken);
return(authorizationHeader);
}
}
internal static async Task <PowerofficeClient> Create(
PowerofficeApiSettings apiSettings,
Guid clientKey)
{
var authorizationHeader = await GetAuthorizationHeader(apiSettings, clientKey);
var powerofficeClient = new PowerofficeClient(authorizationHeader);
lock (SetBaseAddressLock)
{
if (HttpClient.BaseAddress == null)
{
HttpClient.BaseAddress = apiSettings.ApiBaseAddress;
}
}
return(powerofficeClient);
}
public PowerofficeClientFactory(PowerofficeApiSettings apiSettings)
{
ApiSettings = apiSettings;
}
