I searched this subject at many web pages and I tried; but every time web page verification window appears. Already I have ClientId and SecretKey. Is that not enough? I want to do this with c# but without credential.
The easiest way would be via the C# api. You can create an api key and use the library to download files by authenticating with that api key
Google Drive .NET api
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I currently have an app built in MVC 5 that uses individual authentication and has Web API access if the user is authenticated within the browser using their username and password.
I am looking to now add in the ability for Token based authentication so that users can GET and POST data to my app from other applications they utilize. I have been searching forums but unable to find a great method that explains the entire process.
Does anyone have any tutorials for this?
Use JWTs. This is a fast and secure way to let users authenticate and act securely with the APIs of your solution
see here
I have a web app wrapper for my PowerApps app (I have embedded it as an iframe on the home page of my ASP.NET Core app).
I also have the credentials of the Azure organization that developed this application and has access to it.
So, for the first time, my built-in app asks for an email and password to sign in to a Microsoft account. And only after a successful login, I can work with it directly.
But that's not what I want.
I expect to be able to work with the application when I load this page.
So, is there a way to use the app directly without signing in to a Microsoft account?
I got the idea to make a request to the Azure AD API and get a bearer token or cookie from there, and then save it to the client, supposedly filling out a login form and clicking the login button, but "quietly".
To be honest, I don't know how I can do this. I've spent hours researching this problem, but haven't found a suitable solution.
Could you help me?
Thank you in advance!
Use ROPC flow, you just need to send a http request, then get the response.
There will be no pop-ups requiring you to log in.
Tips：
Http Request
Http Response
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I need to download a file from Google drive. I got the code to do that here. In this code they launch a web browser process with an URL which asks user to authorize the API access. After authorization, it provides authorization key which needs to keyed in to our process to actually continue (This is typical oath-2.0 procedure). I want make the entire procedure automated without any user interaction. Thanks in advance.
You can use a service account to get API access without user interaction, however there seems to be no official .NET implementation for it right now.
Someone created a sample here on how to use a service account with Google Analytics in C#.
Supposing I have a user's log in information for Dropbox (his e-mail and the password), how can I upload a file to his account from C#? Is there any way or should I try with another service like Skydrive or Google Drive?
If you want to use Google Drive, the documentation is at https://developers.google.com/drive/, however, you should never ask for other users' credentials and instead use OAuth 2.0.
The reference guide includes C# snippets and there's also a complete ASP.NET MVC tutorial that you can use to get started: https://developers.google.com/drive/examples/dotnet
I normally use a dirty method to get my Facebook Graph API token key in applications that fetches facebook data. I download the Graph API example page at graph dot facebook dot com then I locate the token key in the page. (The account is already connected)
Now, I need to program (for someone else) a commercial application that uses Graph API and I'm afraid such an hacky way could become non-functional if Facebook website changes.
Is there a static URL more common than the example page where the Graph API token_key resides, or do you think my method will be safe for a long time?
[Edit]
Just to comment my question, and the answer to my question:
I was trying to build a desktop application fetching data on Facebook using only Graph Explorer and the Graph API example page instead of doing the web request in the answer. I didn't want to have a desktop application that depends on a Facebook App so that's why I was always asking the user to connect via two text boxes (which is against Facebook t&c) then I was downloading the Graph API examples page to get the proper token.
But Graph Explorer and its examples are using a 'Facebook App' too. So it's not clear if the access_token are going to be valid for a long time or not: It's not a good practice.
The answer is: Redirecting a user to an authentification page then fetching an access token is safer, easy to handle and a lot more stable than connecting a user via text boxes and several WebBrowsers navigation.
You can get an application access token to query public data on Facebook from this URL:
https://graph.facebook.com/oauth/access_token?type=client_cred&client_id={yourappid}&client_secret={yourappscret}
You need to create an application on Facebook and pass it's ID and secret key.
More information on: http://developers.facebook.com/docs/authentication/applications/