/// <summary>
/// Initializes the service before MakeApiCall.
/// </summary>
/// <param name="methodName">Name of the method.</param>
/// <param name="parameters">The method parameters.</param>
protected override void InitForCall(string methodName, object[] parameters)
{
DfaAppConfig config = this.User.Config as DfaAppConfig;
string oAuthHeader = null;
if (this.GetType().Name == "LoginRemoteService")
{
// The choice of OAuth comes only when calling LoginRemoteService.
// All other services will still use the login token.
if (config.AuthorizationMethod == DfaAuthorizationMethod.OAuth2)
{
if (this.User.OAuthProvider != null)
{
oAuthHeader = this.User.OAuthProvider.GetAuthHeader();
}
else
{
throw new DfaApiException(null, DfaErrorMessages.OAuthProviderCannotBeNull);
}
}
}
else
{
if (this.Token == null)
{
this.Token = LoginUtil.GetAuthenticationToken(this.User, this.Signature.Version);
}
}
ContextStore.AddKey("OAuthHeader", oAuthHeader);
ContextStore.AddKey("RequestHeader", requestHeader);
ContextStore.AddKey("Token", Token);
base.InitForCall(methodName, parameters);
}
/// <summary>
/// Gets the request header.
/// </summary>
/// <returns>The request header.</returns>
private RequestHeader GetRequestHeader()
{
DfaAppConfig config = (DfaAppConfig)base.Config;
RequestHeader reqHeader = new RequestHeader();
reqHeader.ApplicationName = config.GetUserAgent();
return(reqHeader);
}
private void DoAuth2Configuration(DfaAppConfig config)
{
// Since we use this page for OAuth callback also, we set the callback
// url as the current page. For a non-web application, this will be null.
config.OAuth2RedirectUri = Request.Url.GetLeftPart(UriPartial.Path);
// Create an OAuth2 object for handling OAuth2 flow.
OAuth2ProviderForApplications oAuth = new OAuth2ProviderForApplications(config);
if (Request.Params["state"] == null) {
// This is the first time this page is being loaded.
// Set the state variable to any value that helps you recognize
// when this url will be called by the OAuth2 server.
oAuth.State = "callback";
// Create an authorization url and redirect the user to that page.
Response.Redirect(oAuth.GetAuthorizationUrl());
} else if (Request.Params["state"] == "callback") {
// This page was loaded because OAuth server did a callback.
// Retrieve the authorization code from the url and use it to fetch
// the access token. This call will also fetch the refresh token if
// your mode is offline.
oAuth.FetchAccessAndRefreshTokens(Request.Params["code"]);
// Save the OAuth2 provider for future use. If you wish to save only
// the values and restore the object later, then save
// oAuth.RefreshToken, oAuth.AccessToken, oAuth.UpdatedOn and
// oAuth.ExpiresIn.
//
// You can later restore the values as
// DfaUser user = new AdWordsUser();
// user.Config.OAuth2Mode = OAuth2Flow.APPLICATION;
// OAuth2ProviderForApplications oAuth =
// (user.OAuthProvider as OAuth2ProviderForApplications);
// oAuth.RefreshToken = xxx;
// oAuth.AccessToken = xxx;
// oAuth.UpdatedOn = xxx;
// oAuth.ExpiresIn = xxx;
//
// Note that only oAuth.RefreshToken is mandatory. If you leave
// oAuth.AccessToken as empty, or if oAuth.UpdatedOn + oAuth.ExpiresIn
// is in the past, the access token will be refreshed by the library.
// You can listen to this event as
//
// oAuth.OnOAuthTokensObtained += delegate(AdsOAuthProvider provider) {
// OAuth2ProviderForApplications oAuth =
// (provider as OAuth2ProviderForApplications);
// // Save oAuth.RefreshToken, oAuth.AccessToken, oAuth.UpdatedOn and
// // oAuth.ExpiresIn.
//};
Session["OAuthProvider"] = oAuth;
// Redirect the user to the main page.
Response.Redirect("Default.aspx");
} else {
throw new Exception("Unknown state for OAuth callback.");
}
}
/// <summary>
/// Handles the Load event of the Page control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="System.EventArgs"/> instance containing
/// the event data.</param>
protected void Page_Load(object sender, EventArgs e) {
// Create an DfaAppConfig object with the default settings in
// App.config.
DfaAppConfig config = new DfaAppConfig();
if (config.AuthorizationMethod == DfaAuthorizationMethod.OAuth2) {
if (config.OAuth2Mode == OAuth2Flow.APPLICATION &&
string.IsNullOrEmpty(config.OAuth2RefreshToken)) {
DoAuth2Configuration(config);
}
}
}
/// <summary>
/// Create a service object.
/// </summary>
/// <param name="signature">Signature of the service being created.</param>
/// <param name="user">The user for which the service is being created.
/// <param name="serverUrl">The server to which the API calls should be
/// made.</param>
/// </param>
/// <returns>An object of the desired service type.</returns>
public override AdsClient CreateService(ServiceSignature signature, AdsUser user,
Uri serverUrl)
{
DfaAppConfig config = (DfaAppConfig)base.Config;
if (serverUrl == null)
{
serverUrl = new Uri(config.DfaApiServer);
}
if (user == null)
{
throw new ArgumentNullException("user");
}
CheckServicePreconditions(signature);
DfaServiceSignature dfaapiSignature = signature as DfaServiceSignature;
AdsClient service = (AdsClient)Activator.CreateInstance(dfaapiSignature.ServiceType);
if (config.Proxy != null)
{
service.Proxy = config.Proxy;
}
service.Timeout = config.Timeout;
service.Url = string.Format("{0}{1}/api/dfa-api/{2}",
serverUrl, dfaapiSignature.Version, dfaapiSignature.ServiceEndpoint);
service.UserAgent = config.GetUserAgent();
service.User = user;
service.Signature = signature;
service.GetType().GetProperty("RequestHeader").SetValue(service,
GetRequestHeader(), null);
SetRequestHeaderNameSpace(signature as DfaServiceSignature, service);
return(service);
}
