private async void webBrowser1_Navigated(object sender, WebBrowserNavigatedEventArgs e)
{
Text = e.Url.AbsoluteUri;
var path = e.Url.AbsoluteUri;
if (path.StartsWith(ConfigAPI.App_redirect))
{
if (string.IsNullOrEmpty(ConfigAPI.client_secret))
{
return;
}
const string code_str = "?code=";
var i = path.IndexOf(code_str);
if (i < 0)
{
return;
}
string code = path.Substring(i + code_str.Length, path.IndexOf('&', i) - i - code_str.Length);
await GetAuthorizationCode(code, ct_soruce.Token);
if (key != null && key.access_token != "")
{
webBrowser1.Navigate(ConfigAPI.LoginSuccess);
timer1.Enabled = true;
}
}
if (path.StartsWith(ConfigAPI.App_GetToken))
{
try
{
var body = webBrowser1.DocumentText;
var i = body.IndexOf("{");
var j = body.IndexOf("}");
if (i < 0 || j < 0)
{
return;
}
key = AmazonDrive.ParseAuthResponse(body.Substring(i, j - i));
// Save refresh_token
server.Refresh_Token = key.refresh_token;
}
catch (Exception ex)
{
error_str = ex.ToString();
System.Diagnostics.Debug.WriteLine(error_str);
}
if (key != null && key.access_token != "")
{
webBrowser1.Navigate(ConfigAPI.LoginSuccess);
timer1.Enabled = true;
}
}
}
static public AuthKeys ParseAuthResponse(string response)
{
AuthKeys key = new AuthKeys();
var serializer = new DataContractJsonSerializer(typeof(Authentication_Info));
using (var ms = new MemoryStream(Encoding.UTF8.GetBytes(response)))
{
var data = (Authentication_Info)serializer.ReadObject(ms);
key.access_token = data.access_token;
key.refresh_token = data.refresh_token;
}
return(key);
}
static public async Task <AuthKeys> RefreshAuthorizationCode(AuthKeys key, CancellationToken ct = default(CancellationToken))
{
string error_str;
using (var client = new HttpClient())
{
try
{
Log("RefreshAuthorizationCode");
var response = await client.PostAsync(
(string.IsNullOrEmpty(ConfigAPI.client_secret))?ConfigAPI.App_RefreshToken : ConfigAPI.AmazonAPI_token,
new FormUrlEncodedContent(new Dictionary <string, string> {
{ "grant_type", "refresh_token" },
{ "refresh_token", key.refresh_token },
{ "client_id", ConfigAPI.client_id },
{ "client_secret", ConfigAPI.client_secret },
}),
ct
).ConfigureAwait(false);
response.EnsureSuccessStatusCode();
string responseBody = await response.Content.ReadAsStringAsync().ConfigureAwait(false);
key = ParseAuthResponse(responseBody);
}
catch (HttpRequestException ex)
{
error_str = ex.Message;
System.Diagnostics.Debug.WriteLine(error_str);
}
catch (OperationCanceledException)
{
throw;
}
catch (Exception ex)
{
error_str = ex.ToString();
System.Diagnostics.Debug.WriteLine(error_str);
}
}
return(key);
}
private async Task GetAuthorizationCode(string access_code, CancellationToken ct = default(CancellationToken))
{
using (var client = new HttpClient())
{
try
{
var response = await client.PostAsync(
ConfigAPI.AmazonAPI_token,
new FormUrlEncodedContent(new Dictionary <string, string> {
{ "grant_type", "authorization_code" },
{ "code", access_code },
{ "client_id", ConfigAPI.client_id },
{ "client_secret", ConfigAPI.client_secret },
{ "redirect_uri", Uri.EscapeUriString(ConfigAPI.App_redirect) },
}),
ct
);
response.EnsureSuccessStatusCode();
string responseBody = await response.Content.ReadAsStringAsync();
// Above three lines can be replaced with new helper method in following line
// string body = await client.GetStringAsync(uri);
key = AmazonDrive.ParseAuthResponse(responseBody);
// Save refresh_token
server.Refresh_Token = key.refresh_token;
}
catch (HttpRequestException ex)
{
error_str = ex.Message;
System.Diagnostics.Debug.WriteLine(error_str);
}
catch (Exception ex)
{
error_str = ex.ToString();
System.Diagnostics.Debug.WriteLine(error_str);
}
}
}
/// <summary>
/// make sure access_token
/// </summary>
/// <param name="ct">CancellationToken</param>
/// <returns>true: access_token is refreshed. false: not refreshed(fresh key or auth error)</returns>
public async Task <bool> EnsureToken(CancellationToken ct = default(CancellationToken))
{
if (DateTime.Now - AuthTimer < TimeSpan.FromMinutes(50))
{
return(false);
}
var retry = 5;
while (retry-- > 0)
{
ct.ThrowIfCancellationRequested();
Auth = await RefreshAuthorizationCode(Auth, ct).ConfigureAwait(false);
await EnsureEndpoint(ct).ConfigureAwait(false);
if (await GetAccountInfo(ct).ConfigureAwait(false))
{
AuthTimer = DateTime.Now;
return(true);
}
await Task.Delay(1000, ct).ConfigureAwait(false);
}
return(false);
}
