Google Drive Authentication In Salesforce - Easy Steps (Authentication Part 2)

Now where comes part 2 of authentication. This time it's with Google Drive.

In this blog Authentication with Google is explained so developers can get started.

Step 1 : Create  account on google (hope you already have), then go to developer console to create a project. Now click on project which is newly created then click on APIs and auth > APIs and make Drive API "on".

Step 2 : Now "Create New Client ID " which will look something like this :

Now we will use this info in salesforce to authenticate.

Step 3 : Create this apex class in Salesforce

public class GoogleDriveController
{
    //Fetched from URL
    private String code ;
    private string key = '134427681112-ld4vp2l1jut3aj2fktip776081nhn8l3.apps.googleusercontent.com' ;
    private string secret = 'hdHNk4GjNtkR4nNL1SqCfRk_' ;
    private string redirect_uri = 'https://c.ap1.visual.force.com/apex/GoogleDrivePage' ;
    
    public GoogleDriveController()
    {
        code = ApexPages.currentPage().getParameters().get('code') ;
        //Get the access token once we have code
        if(code != '' && code != null)
        {
            AccessToken() ;
        }
    }
    
    public PageReference DriveAuth()
    {
        //Authenticating
        PageReference pg = new PageReference(GoogleDriveAuthUri (key , redirect_uri)) ;
        return pg ;
    }
    
    public String GoogleDriveAuthUri(String Clientkey,String redirect_uri)
    {
        String key = EncodingUtil.urlEncode(Clientkey,'UTF-8');
        String uri = EncodingUtil.urlEncode(redirect_uri,'UTF-8');
        String authuri = '';
        authuri = 'https://accounts.google.com/o/oauth2/auth?'+
        'client_id='+key+
        '&response_type=code'+
        '&scope=https://www.googleapis.com/auth/drive'+
        '&redirect_uri='+uri+
        '&state=security_token%3D138r5719ru3e1%26url%3Dhttps://oa2cb.example.com/myHome&'+
        '&login_hint=jsmith@example.com&'+
        'access_type=offline';
        return authuri;
    }
    
    
    public void AccessToken()
    {
        //Getting access token from google
        HttpRequest req = new HttpRequest();
        req.setMethod('POST');
        req.setEndpoint('https://accounts.google.com/o/oauth2/token');
        req.setHeader('content-type', 'application/x-www-form-urlencoded');
        String messageBody = 'code='+code+'&client_id='+key+'&client_secret='+secret+'&redirect_uri='+redirect_uri+'&grant_type=authorization_code';
        req.setHeader('Content-length', String.valueOf(messageBody.length()));
        req.setBody(messageBody);
        req.setTimeout(60*1000);

        Http h = new Http();
        String resp;
        HttpResponse res = h.send(req);
        resp = res.getBody();
        
        System.debug(' You can parse the response to get the access token ::: ' + resp);
   }
}

Step 4 : Create this visualforce page (GoogleDrivePage) in Salesforce

Step 5 : Replace the code :

You can replace these three variables according to your settings (created in step 2)

private string key = '134427681112-ld4vp2l1jut3aj2fktip776081nhn8l3.apps.googleusercontent.com' ;
private string secret = 'hdHNk4GjNtkR4nNL1SqCfRk_' ;
private string redirect_uri = 'https://c.ap1.visual.force.com/apex/GoogleDrivePage' ;

Step 6 : Don't forget to create remote site setting :

Step 7 : All set to go, now hit the page "https:// ..... /apex/GoogleDrivePage", make sure your debug is on. Once authenticated with google debug will print the access token.

Now you can use this access token for further requests.

Please note, code is not beautified as this is just to explain how you can authenticate google with salesforce. A lot more creativity can be applied here.


Happy Coding!!

Dropbox Authentication In Salesforce - Easy Setup (Authentication Part 1)

From log time managing data is a big deal, and a lot are concerned with it. Multiple options are available to handle this, out of them Dropbox, Box.com, Amazon are the main ones.

In this blog Authentication with Dropbox is explained so developers can get started.

Step 1 : Create an account on Dropbox, then go to this link and create an app. It will create "App Key" and "App Secret" which we will be using in Salesforce. Leave the OAuth2 section blank for now.

Step 2 : Go to salesforce and create this apex class (DropboxController) :

public class DropboxController
{
    //Fetched from URL
    String code ;
    
    public DropboxController()
    {
        code = ApexPages.currentPage().getParameters().get('code') ;
        //Get the access token once we have code
        if(code != '' && code != null)
        {
            AccessToken() ;
        }
    }
    
    public PageReference DropAuth()
    {
        //Authenticating
        PageReference pg = new PageReference('https://www.dropbox.com/1/oauth2/authorize?response_type=code&client_id=vaabb5qz4jv28t5&redirect_uri=https://c.ap1.visual.force.com/apex/DropboxPage&state=Mytesting') ;
        return pg ;
    }
    
    public void AccessToken()
    {
        //Getting access token from dropbox
        String tokenuri = 'https://api.dropbox.com/1/oauth2/token?grant_type=authorization_code&code='+code+'&redirect_uri=https://c.ap1.visual.force.com/apex/DropboxPage'; 
        HttpRequest req = new HttpRequest();
        req.setEndpoint(tokenuri);
        req.setMethod('POST');
        req.setTimeout(60*1000);
          
        Blob headerValue = Blob.valueOf('vaabb5qz4jv28t5' + ':' + 'dpmmll522bep6pt');
        String authorizationHeader = 'BASIC ' + EncodingUtil.base64Encode(headerValue);
        req.setHeader('Authorization', authorizationHeader);
        Http h = new Http();
        String resp;
        HttpResponse res = h.send(req);
        resp = res.getBody();
        
        System.debug(' You can parse the response to get the access token ::: ' + resp);
   }
}

Step 3 : Now create visualforce page (DropboxPage) :

Step 4 : Replace the code with your values

1 . As you can see we have this in code :

PageReference pg = new PageReference('https://www.dropbox.com/1/oauth2/authorize?response_type=code&client_id=vaabb5qz4jv28t5&redirect_uri=https://c.ap1.visual.force.com/apex/DropboxPage&state=Mytesting') ;

You have to replace "client_id" with your "App Key" (redirect_uri is the complete page URL which we've just created). Now as visualforce page is created you can fill the OAuth2 section as shown in the screenshot above in dropbox.

2. Replace "dpmmll522bep6pt" in this line

Blob headerValue = Blob.valueOf('vaabb5qz4jv28t5' + ':' + 'dpmmll522bep6pt');

with you "App Secret"

Step 5 : Don't forget to set the remote site settings for dropbox

Now all set to go. Open the page "https:// ..... /apex/DropboxPage" and hit "Dropbox Authentication". In the debug you will get the access token which you can further use to hit Dropbox APIs.

Please note, code is not beautified as this is just to explain how you can authenticate dropbox with salesforce. A lot more creativity can be applied here.

From here everything is set and you are ready to hit the dropbox API and fetch the data or store the data. Complete documentation is here.

Happy Coding!!