public async Task <AuthorizationResponse> GetAuthorizationAsync(string accessToken)
{
string responseJson;
var requestUri = new Uri(launchpadUri, "authorization.json");
using (var requestMessage = new HttpRequestMessage(HttpMethod.Get, requestUri))
{
requestMessage.Headers.UserAgent.TryParseAdd(userAgent);
requestMessage.Headers.Authorization = new AuthenticationHeaderValue("Bearer", accessToken);
using (var httpClient = httpClientPool.Create())
using (var responseMessage = await httpClient.SendAsync(requestMessage))
{
await HttpResponseUtils.EnsureSuccessAsync(responseMessage);
responseJson = await responseMessage.Content.ReadAsStringAsync();
}
}
return(JsonConvert.DeserializeObject <AuthorizationResponse>(responseJson));
}
private async Task <string> GetAuthenticityTokenAsync(Uri requestUri, string basecampCookieString)
{
string authenticityToken;
using (var requestMessage = new HttpRequestMessage(HttpMethod.Get, requestUri))
{
InitializeBrowserRequest(requestMessage);
requestMessage.Headers.TryAddWithoutValidation("Cookie", basecampCookieString);
using (var httpClient = httpClientPool.Create(new HttpClientHandlerOptions()))
using (var responseMessage = await httpClient.SendAsync(requestMessage))
{
await HttpResponseUtils.EnsureSuccessAsync(responseMessage);
var responseHtml = await responseMessage.Content.ReadAsStringAsync();
authenticityToken = ParseInputValue(responseHtml, "authenticity_token");
}
}
return(authenticityToken);
}
public async Task <AccessTokenSource> AuthenticateVerificationCodeAsync(string verificationCode)
{
string responseJson;
var requestUri = new Uri(launchpadUri, "authorization/token");
using (var requestMessage = new HttpRequestMessage(HttpMethod.Post, requestUri))
{
requestMessage.Content = new FormUrlEncodedContent(new Dictionary <string, string>
{
["type"] = "web_server",
["client_id"] = oauthOptions.ClientId,
["redirect_uri"] = oauthOptions.RedirectUrl,
["client_secret"] = oauthOptions.ClientSecret,
["code"] = verificationCode
});
requestMessage.Headers.UserAgent.TryParseAdd(userAgent);
using (var httpClient = httpClientPool.Create())
using (var responseMessage = await httpClient.SendAsync(requestMessage))
{
await HttpResponseUtils.EnsureSuccessAsync(responseMessage);
responseJson = await responseMessage.Content.ReadAsStringAsync();
}
}
var tokenResponse = JsonConvert.DeserializeObject <TokenResponse>(responseJson);
var accessTokenSourceOptions = new AccessTokenSourceOptions(
tokenUri: new Uri(launchpadUri, "authorization/token"),
oauthOptions: oauthOptions,
refreshToken: tokenResponse.RefreshToken
);
var accessTokenSource = new AccessTokenSource(accessTokenSourceOptions);
accessTokenSource.LoadToken(tokenResponse);
return(accessTokenSource);
}
public async Task <AccessTokenSource> AuthenticateCookieAsync(string basecampCookieString, string username)
{
// We probably need an authenticity token from what's supposed to be the page before this one.
var authenticityToken = await GetAuthenticityTokenAsync(
requestUri : new Uri(launchpadUri, $"authorization/new?type=web_server&client_id={Uri.EscapeDataString(oauthOptions.ClientId)}&redirect_uri={oauthOptions.RedirectUrl}"),
basecampCookieString : basecampCookieString
);
string verificationCode;
var requestUri = new Uri(launchpadUri, "authorization");
using (var requestMessage = new HttpRequestMessage(HttpMethod.Post, requestUri))
{
requestMessage.Content = new FormUrlEncodedContent(new Dictionary <string, string>
{
["utf8"] = "✓",
["authenticity_token"] = authenticityToken,
["client_id"] = oauthOptions.ClientId,
["client_secret"] = "",
["type"] = "web_server",
["state"] = "",
["redirect_uri"] = oauthOptions.RedirectUrl,
["commit"] = ""
});
InitializeBrowserRequest(requestMessage);
requestMessage.Headers.Referrer = new Uri(launchpadUri, $"signin?login_hint={Uri.EscapeDataString(username)}");
requestMessage.Headers.TryAddWithoutValidation("Cookie", basecampCookieString);
using (var httpClient = httpClientPool.Create(new HttpClientHandlerOptions(allowAutoRedirect: false)))
using (var responseMessage = await httpClient.SendAsync(requestMessage))
{
await HttpResponseUtils.EnsureSuccessAsync(responseMessage, allowRedirect : true);
if (responseMessage.StatusCode != System.Net.HttpStatusCode.Redirect)
{
throw new BasecampResponseException($"Expected a redirect for authorization/new request but was {responseMessage.StatusCode}")
{
RequestUri = requestUri,
ResponseStatusCode = responseMessage.StatusCode,
};
}
var redirectLocation = responseMessage.Headers.Location;
if (redirectLocation == null)
{
throw new BasecampResponseException($"Expected a redirect location for authorization/new request")
{
RequestUri = requestUri,
ResponseStatusCode = responseMessage.StatusCode,
};
}
// Location: urn:ietf:wg:oauth:2.0:oob?code=de615fc1
var queryStringPairs = ParseQueryString(redirectLocation.Query);
verificationCode = queryStringPairs.Where(kv => kv.Key == "code").Select(kv => kv.Value).FirstOrDefault();
if (verificationCode == null)
{
throw new BasecampResponseException($"Expected verification code for authorization/new request but url was <{redirectLocation}>")
{
RequestUri = requestUri,
ResponseStatusCode = responseMessage.StatusCode,
};
}
}
}
return(await AuthenticateVerificationCodeAsync(verificationCode));
}
