OAuth Component

Properties Methods Events Configuration Settings Errors

The OAuth component is used to authorize a client and provide an authorization string used in future requests.

Syntax

nsoftware.IPWorksAuth.Oauth

Remarks

The OAuth component provides an easy way to obtain an authorization string for future requests to a service. The component implements an OAuth 2.0 client.

To begin using the component you will first need to register your application with the service you want to use. During this process you should obtain a ClientId and ClientSecret as well as the ServerAuthURL and ServerTokenURL for the authorization server. Then set ClientProfile to the client type that best describes your situation and call GetAuthorization.

The following client types are currently supported by the component:

Application (desktop application)
WebServer (server side application such as a web site)
Device (an application without browser access such as a game console)
Mobile (phone or tablet application)
Browser (javascript application)
JWT (server to server authentication using a JWT bearer token such as Google service account authentication)

Please see the detailed descriptions below for each client type and how the component is used to authorize an application using that client type.

Application Client Type

The application client type is applicable to applications that are run by the user directly. For instance a windows form application would use the application client type. To authorize your application (client) using the application client type follow the steps below.

First, set ClientProfile to cfApplication. This defines the client type the component will use. Set the ClientId, ClientSecret, ServerAuthURL, and ServerTokenURL to the values you obtained when registering your application.

Next, call GetAuthorization to begin the authorization process. When GetAuthorization is called the component will build the URL to which the user will be directed and fire the LaunchBrowser event. The component will then launch the browser using the command and URL shown in the LaunchBrowser event.

The user will authenticate to the service, and then be redirected back to an embedded web server that was automatically started when GetAuthorization was called. At this time the ReturnURL event will fire. This event provides an opportunity to provide a custom response to your user that they will see in their browser.

The component will then automatically exchange the grant that was returned by the authorization server for the access token using the HTTP endpoint specified in ServerTokenURL.

The authorization is now complete and the GetAuthorization method will return the authorization string. To use the authorization string with any of our components simply pass this value to the Authorization property before making the request.

A simple example is shown below.

OAuth.ClientId = "MyId";
OAuth.ClientSecret = "MyPassword";
OAuth.ServerAuthURL = "https://accounts.google.com/o/oauth2/auth";
OAuth.ServerTokenURL = "https://accounts.google.com/o/oauth2/token";
HTTP.Authorization = OAuth.GetAuthorization();
HTTP.Get("https://www.googleapis.com/oauth2/v1/userinfo");

WebServer Client Type

The WebServer client type is applicable to applications that are run on the server side where the user uses the application from a web browser. To authorize your application (client) using this client type follow the steps below.

First, set ClientProfile to cfWebServer. This defines the client type the component will use. Set the ClientId, ClientSecret, ServerAuthURL, and ServerTokenURL to the values you obtained when registering your application. Set ReturnURL to the page on your site that will be the endpoint the user is redirected back to after authentication.

Next, call GetAuthorizationURL. This will return a URL to which the user should be redirected. Redirect the user to this URL.

After the user authenticates and is returned to the page on your site specified by ReturnURL, parse the "code" query string parameter from the incoming request. Set AuthorizationCode to this value.

Call GetAuthorization to exchange the code specified in AuthorizationCode for a token from the server specified by ServerTokenURL. GetAuthorization returns the authorization string. To use the authorization string with any of our components simply pass this value to the Authorization property before making the request.

Device Client Type

The Device client type is applicable to applications that are run on devices where no web browser can be used. For instance a game console would use the device client type. To authorize your application (client) using the device client type follow the steps below.

First, set ClientProfile to cfDevice. This defines the client type the component will use. Set the ClientId, ClientSecret, ServerAuthURL, and ServerTokenURL to the values you obtained when registering your application. Do not set ReturnURL.

Next, call GetAuthorizationURL. The component will automatically make a request to ServerAuthURL to obtain a user code for the device. The GetAuthorizationURL method will return the URL your user must visit from another device or computer that has web browser support. The GetAuthorizationURL method will also populate DeviceUserCode. This device user code must also be provided to the user. The user will enter the code at the URL returned by GetAuthorizationURL.

At this time, call GetAuthorization. The component will begin polling the server specified in ServerTokenURL. The polling interval is specified (in seconds) by the PollingInterval setting.

After the user has authenticated, the GetAuthorization method will return the authorization string. To use the authorization string with any of our components simply pass this value to the Authorization property before making the request.

Mobile Client Type

The Mobile client type is applicable to applications that are run on devices where a web browser can be used. For instance a mobile phone or tablet. The behavior when using this client type is very similar to the Application client type. The only difference between the Mobile and Application client types is the way the browser is launched, when set to Mobile the LaunchBrowser event will fire but the component will not attempt to launch the browser automatically. The browser must be launched manually from code. This behavior is the only difference between the Mobile and Application client type. Please read the steps above for the Application client type for a more detailed look at the process.

JWT Bearer Token (Server to Server) Type

The JWT (JSON Web Token) Bearer Token type is available for server to server authentication. For instance this may be used by web applications to access a Google service. In this case the application will access data on behalf of the service account, not the end user. End user interaction is not required.

First, specify AuthorizationScope and ServerTokenURL.

Next specify JWT specific values. The use of the JWT profile requires additional configuration settings to be specified, including a certificate with private key used to sign the JWT. Either specify the JWTJSONKey configuration setting, which will parse the necessary information automatically, or manually specify the following configuration settings:

Additional fields may be added to the JWT using the AddParam method.

For example:

oauth.AuthorizationScope = "https://www.googleapis.com/auth/analytics";
oauth.ServerTokenURL =  "https://www.googleapis.com/oauth2/v3/token";
oauth.ClientProfile = OauthClientProfiles.cfJWT;
oauth.Config("JWTIssuer=111917875427-g39d5bar90mjgiuf2n5ases9qk0j2q0p@developer.gserviceaccount.com");
oauth.Config("JWTAudience=https://www.googleapis.com/oauth2/v3/token");
oauth.Config("JWTCertStoreType=2");
oauth.Config("JWTCertStore=C:\\MyCertificate.p12");
oauth.Config("JWTCertStorePassword=password");
oauth.Config("JWTCertSubject=*");
oauth.Config("JWTValidityTime=5400"); //in seconds

string authStr = oauth.GetAuthorization();

Property List

The following is the full list of the properties of the component with short descriptions. Click on the links for further details.


Accept	A list of acceptable MIME types for the request.
AccessToken	The access token returned by the authorization server.
AllowHTTPCompression	Enables HTTP compression for receiving data.
AuthorizationCode	The authorization code that is exchanged for an access token.
AuthorizationScope	The scope request or response parameter used during authorization.
ClientId	The id of the client assigned when registering the application.
ClientProfile	The type of client that is requesting authorization.
ClientSecret	The secret value for the client assigned when registering the application.
Connected	Shows whether the component is connected.
ContentType	Content type for posts and puts.
Cookies	Collection of cookies.
Firewall	A set of properties related to firewall access.
FollowRedirects	Determines what happens when the server issues a redirect.
From	The email address of the HTTP agent (optional).
HTTPMethod	The HTTP method used for the request.
Idle	The current status of the component.
IfModifiedSince	A date determining the maximum age of the desired document.
LocalHost	The name of the local host or user-assigned IP interface through which connections are initiated or accepted.
OtherHeaders	Other headers as determined by the user (optional).
Params	The parameters to be included in the request to the authorization server, or received in the response.
ParsedHeaders	Collection of headers returned from the last request.
PostData	The data to post with the URL if the POST method is used.
Pragma	A browser/server specific header line (optional).
Proxy	A set of properties related to proxy access.
Range	The byte-range to be sent to the server.
Referer	Referer URL/document (optional).
RefreshToken	Specifies the refresh token received from or sent to the authorization server.
ReturnURL	The URL where the user (browser) returns after authenticating.
ServerAuthURL	The URL of the authorization server.
ServerTokenURL	The URL used to obtain the access token.
SSLAcceptServerCert	Instructs the component to unconditionally accept the server certificate that matches the supplied certificate.
SSLCert	The certificate to be used during SSL negotiation.
SSLServerCert	The server certificate for the last established connection.
StatusLine	The first line of the last server response.
Timeout	A timeout for the component.
TransferredData	The contents of the last response from the server.
TransferredDataLimit	The maximum of data to be transferred.
TransferredHeaders	The full set of headers as received from the server.

Method List

The following is the full list of the methods of the component with short descriptions. Click on the links for further details.


AddCookie	Adds a cookie and the corresponding value to the outgoing request headers.
AddParam	Adds a name-value pair to the query string parameters of outgoing request.
Config	Sets or retrieves a configuration setting .
DoEvents	Processes events from the internal message queue.
GetAuthorization	Gets the authorization string required to access the protected resource.
GetAuthorizationURL	Builds and returns the URL to which the user should be re-directed for authorization.
Interrupt	Interrupt the current method.
Reset	Reset the component.
StartWebServer	Starts the embedded web server.
StopWebServer	Stops the embedded web server.

Event List

The following is the full list of the events fired by the component with short descriptions. Click on the links for further details.


Connected	Fired immediately after a connection completes (or fails).
ConnectionStatus	Fired to indicate changes in connection state.
Disconnected	Fired when a connection is closed.
EndTransfer	Fired when a document finishes transferring.
Error	Information about errors during data delivery.
Header	Fired every time a header line comes in.
LaunchBrowser	Fires before launching a browser with the authorization URL.
Redirect	Fired when a redirection is received from the server.
ReturnURL	Fires when the user is redirected to the embedded web server.
SetCookie	Fired for every cookie set by the server.
SSLServerAuthentication	Fired after the server presents its certificate to the client.
SSLStatus	Shows the progress of the secure connection.
StartTransfer	Fired when a document starts transferring (after the headers).
Status	Fired when the HTTP status line is received from the server.
Transfer	Fired while a document transfers (delivers document).

Configuration Settings

The following is a list of configuration settings for the component with short descriptions. Click on the links for further details.


AuthorizationTokenType	The type of access token returned.
AuthorizationURL	Specifies the URL used for authorization.
BrowserResponseTimeout	Specifies the amount of time to wait for a response from the browser.
DeviceUserCode	The device's user code when the ClientProfile is set to cfDevice.
FormVarCount	Specifies the number of additional form variables to include in the request.
FormVarName[i]	Specifies the form variable name at the specified index.
FormVarValue[i]	Specifies the form variable value at the specified index.
JWTJSONKey	The file path of the JWT JSON Key, or a string containing its content.
JWTIssuer	The JWT issuer when the ClientProfile is set to cfJWT.
JWTAudience	The JWT audience when the ClientProfile is set to cfJWT.
JWTCertStoreType	The type of certificate store.
JWTCertStore	The name of the certificate store for the JWT signing certificate.
JWTCertStorePassword	The JWT signing certificate password.
JWTCertSubject	The JWT signing certificate subject.
JWTSignatureAlgorithm	The signature algorithm used to sign the JWT.
JWTSubject	The subject field in the JWT.
JWTValidityTime	The amount of time in seconds for which the assertion in the JWT is valid.
Office365ServiceAPIVersion	The API version of the Office 365 service being discovered.
Office365ServiceCapability	The API capability of the Office 365 service being discovered.
Office365ServiceEndpoint	The Office 365 endpoint for the service that matches the criteria specified.
PollingInterval	The interval in seconds between polling requests when the device client type is used.
ReUseWebServer	Determines if the same server instance is used between requests.
TokenInfoFieldCount	The number of fields in the tokeninfo service response.
TokenInfoFieldName[i]	The name of the tokeninfo service response field.
TokenInfoFieldValue[i]	The value of the tokeninfo service response field.
TokenInfoURL	The URL of the tokeninfo service.
ValidateToken	Validates the specified access token with a tokeninfo service.
WebServerFailedResponse	The custom response that will be displayed to the user if authentication failed.
WebServerHost	The hostname used by the embedded web server displayed in the ReturnURL.
WebServerPort	The port on which the embedded web server listens.
WebServerResponse	The custom response that will be displayed to the user.
WebServerUseSSL	Whether the web server requires SSL connections.
WebServerSSLCertStoreType	The type of certificate store.
WebServerSSLCertStore	The name of the certificate store for the client certificate.
WebServerSSLCertStorePassword	The certificate password.
WebServerSSLCertSubject	The certificate subject.
AcceptEncoding	Used to tell the server which types of content encodings the client supports.
AllowHTTPCompression	This property enables HTTP compression for receiving data.
AllowIdenticalRedirectURL	Allow redirects to the same URL.
Append	Whether to append data to LocalFile.
Authorization	The Authorization string to be sent to the server.
BytesTransferred	Contains the number of bytes transferred in the response data.
EncodeURL	If set to true the URL will be encoded by the component.
FollowRedirects	Determines what happens when the server issues a redirect.
GetOn302Redirect	If set to true the component will perform a GET on the new location.
HTTPVersion	The version of HTTP used by the component.
IfModifiedSince	A date determining the maximum age of the desired document.
KeepAlive	Determines whether the HTTP connection is closed after completion of the request.
MaxRedirectAttempts	Limits the number of redirects that are followed in a request.
OtherHeaders	Other headers as determined by the user (optional).
ProxyAuthorization	The authorization string to be sent to the proxy server.
ProxyAuthScheme	The authorization scheme to be used for the proxy.
ProxyPassword	A password if authentication is to be used for the proxy.
ProxyPort	Port for the proxy server (default 80).
ProxyServer	Name or IP address of a proxy server (optional).
ProxyUser	A user name if authentication is to be used for the proxy.
TransferredDataLimit	The maximum number of incoming bytes to be stored by the component.
TransferredHeaders	The full set of headers as received from the server.
UseChunkedEncoding	Enables or Disables HTTP chunked encoding for transfers.
ChunkSize	Specifies the chunk size in bytes when using chunked encoding.
UserAgent	Information about the user agent (browser).
KerberosSPN	The Service Principal Name for the Kerberos Domain Controller.
ConnectionTimeout	Sets a separate timeout value for establishing a connection.
FirewallAutoDetect	Tells the component whether or not to automatically detect and use firewall system settings, if available.
FirewallHost	Name or IP address of firewall (optional).
FirewallPassword	Password to be used if authentication is to be used when connecting through the firewall.
FirewallPort	The TCP port for the FirewallHost;.
FirewallType	Determines the type of firewall to connect through.
FirewallUser	A user name if authentication is to be used connecting through a firewall.
KeepAliveTime	The inactivity time in milliseconds before a TCP keep-alive packet is sent.
KeepAliveInterval	The retry interval, in milliseconds, to be used when a TCP keep-alive packet is sent and no response is received.
Linger	When set to True, connections are terminated gracefully.
LingerTime	Time in seconds to have the connection linger.
LocalHost	The name of the local host through which connections are initiated or accepted.
LocalPort	The TCP port in the local host where the component binds.
MaxLineLength	The maximum amount of data to accumulate when no EOL is found.
MaxTransferRate	The transfer rate limit in bytes per second.
RecordLength	The length of received data records.
TCPKeepAlive	Determines whether or not the keep alive socket option is enabled.
UseIPv6	Whether to use IPv6.
TcpNoDelay	Whether or not to delay when sending packets.
ReuseSSLSession	Determines if the SSL session is reused.
SSLCipherStrength	The minimum cipher strength used for bulk encryption.
SSLEnabledProtocols	Used to enable/disable the supported security protocols.
SSLProvider	The name of the security provider to use.
SSLSecurityFlags	Flags that control certificate verification.
OpenSSLCADir	The path to a directory containing CA certificates.
OpenSSLCAFile	Name of the file containing the list of CA's trusted by your application.
OpenSSLCipherList	A string that controls the ciphers to be used by SSL.
OpenSSLPrngSeedData	The data to seed the pseudo random number generator (PRNG).
AbsoluteTimeout	Determines whether timeouts are inactivity timeouts or absolute timeouts.
FirewallData	Used to send extra data to the firewall.
InBufferSize	The size in bytes of the incoming queue of the socket.
OutBufferSize	The size in bytes of the outgoing queue of the socket.
CodePage	The system code page used for Unicode to Multibyte translations.