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(DataFlex) OAuth2 using a SOCKS Proxy (for a Desktop Application)Demonstrates how to send OAuth2 communications through a SOCKS proxy for a desktop application. The technique is the same for all OAuth2 applications. This one happens to demonstrate for Microsoft Graph.
Use ChilkatAx-win32.pkg Procedure Test Variant vSocket Handle hoSocket Handle hoOauth2 Boolean iSuccess String sUrl Integer iNumMsWaited Handle hoJson Handle hoDtExpire Handle hoFac String sTemp1 Integer iTemp1 Boolean bTemp1 // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // To use a SOCKS proxy with OAuth2, create a Chilkat socket object and specify the details for the // SOCKS proxy server (SOCKS4 or SOCKS5). Get Create (RefClass(cComChilkatSocket)) To hoSocket If (Not(IsComObjectCreated(hoSocket))) Begin Send CreateComObject of hoSocket End // Use your SOCKS proxy server domain or IP address. Set ComSocksHostname Of hoSocket To "mysocksproxyserver.com" // Change this to the listening port of your SOCKS proxy server (if necessary) Set ComSocksPort Of hoSocket To 1080 Set ComSocksUsername Of hoSocket To "myProxyLogin" Set ComSocksPassword Of hoSocket To "myProxyPassword" // Set the SOCKS version to 4 or 5 based on the version // of the SOCKS proxy server: Set ComSocksVersion Of hoSocket To 5 // Note: SOCKS4 servers only support usernames without passwords. // SOCKS5 servers support full login/password authentication. Get Create (RefClass(cComChilkatOAuth2)) To hoOauth2 If (Not(IsComObjectCreated(hoOauth2))) Begin Send CreateComObject of hoOauth2 End // We don't need to connect the socket beforehand. // Just tell oauth2 to use the socket which has the SOCKS proxy properties. Get pvComObject of hoSocket to vSocket Get ComUseConnection Of hoOauth2 vSocket To iSuccess // This should be the port in the localhost callback URL for your app. // The callback URL would look like "http://localhost:3017/" if the port number is 3017. Set ComListenPort Of hoOauth2 To 3017 Set ComAuthorizationEndpoint Of hoOauth2 To "https://login.microsoftonline.com/common/oauth2/v2.0/authorize" Set ComTokenEndpoint Of hoOauth2 To "https://login.microsoftonline.com/common/oauth2/v2.0/token" // Replace these with actual values. Set ComClientId Of hoOauth2 To "MICROSOFT-GRAPH-CLIENT-ID" // This is your app password: Set ComClientSecret Of hoOauth2 To "MICROSOFT-GRAPH-CLIENT-SECRET" Set ComCodeChallenge Of hoOauth2 To False // Provide a SPACE separated list of scopes. // See https://developer.microsoft.com/en-us/graph/docs/authorization/permission_scopes // Important: To get a refresh token in the final response, you have to ask for "offline_access" scope Set ComScope Of hoOauth2 To "openid profile offline_access user.readwrite mail.readwrite mail.send files.readwrite" // Begin the OAuth2 three-legged flow. This returns a URL that should be loaded in a browser. Get ComStartAuth Of hoOauth2 To sUrl Get ComLastMethodSuccess Of hoOauth2 To bTemp1 If (bTemp1 <> True) Begin Get ComLastErrorText Of hoOauth2 To sTemp1 Showln sTemp1 Procedure_Return End // At this point, your application should load the URL in a browser. // For example, // in C#: System.Diagnostics.Process.Start(url); // in Java: Desktop.getDesktop().browse(new URI(url)); // in VBScript: Set wsh=WScript.CreateObject("WScript.Shell") // wsh.Run url // in Xojo: ShowURL(url) (see http://docs.xojo.com/index.php/ShowURL) // in Dataflex: Runprogram Background "c:\Program Files\Internet Explorer\iexplore.exe" sUrl // The Microsoft account owner would interactively accept or deny the authorization request. // Add the code to load the url in a web browser here... // Add the code to load the url in a web browser here... // Add the code to load the url in a web browser here... // Now wait for the authorization. // We'll wait for a max of 30 seconds. Move 0 To iNumMsWaited While ((iNumMsWaited < 30000) And ((ComAuthFlowState(hoOauth2)) < 3)) Send ComSleepMs To hoOauth2 100 Move (iNumMsWaited + 100) To iNumMsWaited Loop // If there was no response from the browser within 30 seconds, then // the AuthFlowState will be equal to 1 or 2. // 1: Waiting for Redirect. The OAuth2 background thread is waiting to receive the redirect HTTP request from the browser. // 2: Waiting for Final Response. The OAuth2 background thread is waiting for the final access token response. // In that case, cancel the background task started in the call to StartAuth. Get ComAuthFlowState Of hoOauth2 To iTemp1 If (iTemp1 < 3) Begin Get ComCancel Of hoOauth2 To iSuccess Showln "No response from the browser!" Procedure_Return End // Check the AuthFlowState to see if authorization was granted, denied, or if some error occurred // The possible AuthFlowState values are: // 3: Completed with Success. The OAuth2 flow has completed, the background thread exited, and the successful JSON response is available in AccessTokenResponse property. // 4: Completed with Access Denied. The OAuth2 flow has completed, the background thread exited, and the error JSON is available in AccessTokenResponse property. // 5: Failed Prior to Completion. The OAuth2 flow failed to complete, the background thread exited, and the error information is available in the FailureInfo property. Get ComAuthFlowState Of hoOauth2 To iTemp1 If (iTemp1 = 5) Begin Showln "OAuth2 failed to complete." Get ComFailureInfo Of hoOauth2 To sTemp1 Showln sTemp1 Procedure_Return End Get ComAuthFlowState Of hoOauth2 To iTemp1 If (iTemp1 = 4) Begin Showln "OAuth2 authorization was denied." Get ComAccessTokenResponse Of hoOauth2 To sTemp1 Showln sTemp1 Procedure_Return End Get ComAuthFlowState Of hoOauth2 To iTemp1 If (iTemp1 <> 3) Begin Get ComAuthFlowState Of hoOauth2 To iTemp1 Showln "Unexpected AuthFlowState:" iTemp1 Procedure_Return End Showln "OAuth2 authorization granted!" Get ComAccessToken Of hoOauth2 To sTemp1 Showln "Access Token = " sTemp1 // Get the full JSON response: Get Create (RefClass(cComChilkatJsonObject)) To hoJson If (Not(IsComObjectCreated(hoJson))) Begin Send CreateComObject of hoJson End Get ComAccessTokenResponse Of hoOauth2 To sTemp1 Get ComLoad Of hoJson sTemp1 To iSuccess Set ComEmitCompact Of hoJson To False // The JSON response looks like this: // { // "token_type": "Bearer", // "scope": "User.Read Mail.ReadWrite Mail.Send", // "expires_in": 3600, // "ext_expires_in": 0, // "access_token": "EwBAA8l6B...", // "refresh_token": "MCRMdbe...", // "id_token": "eyJ0eXA..." // } // If an "expires_on" member does not exist, then add the JSON member by // getting the current system date/time and adding the "expires_in" seconds. // This way we'll know when the token expires. Get ComHasMember Of hoJson "expires_on" To bTemp1 If (bTemp1 <> True) Begin Get Create (RefClass(cComCkDateTime)) To hoDtExpire If (Not(IsComObjectCreated(hoDtExpire))) Begin Send CreateComObject of hoDtExpire End Get ComSetFromCurrentSystemTime Of hoDtExpire To iSuccess Get ComIntOf Of hoJson "expires_in" To iTemp1 Get ComAddSeconds Of hoDtExpire iTemp1 To iSuccess Get ComGetAsUnixTimeStr Of hoDtExpire False To sTemp1 Get ComAppendString Of hoJson "expires_on" sTemp1 To iSuccess End Get ComEmit Of hoJson To sTemp1 Showln sTemp1 // Save the JSON to a file for future requests. Get Create (RefClass(cComCkFileAccess)) To hoFac If (Not(IsComObjectCreated(hoFac))) Begin Send CreateComObject of hoFac End Get ComEmit Of hoJson To sTemp1 Get ComWriteEntireTextFile Of hoFac "qa_data/tokens/microsoftGraph.json" sTemp1 "utf-8" False To iSuccess End_Procedure |
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