facebook-graph-api interview questions
Top facebook-graph-api frequently asked interview questions
I'm looking for a list of all Facebook can return when you try to fetch infos using Graph API. Can anyone help?
Facebook returns a 400 HTTP error, and a JSON content like:
{
"error": {
"type": "OAuthException",
"message": "Invalid OAuth access token signature."
}
}
I'm searching the different returns of the same kind it is possible to get.
Source: (StackOverflow)
Can anyone help me to send message to facebook friends using graph api.
I tried
$response = $facebook->call_api("/me/feed", "post", "to=john","message=You have a Test message");
It's not working.
I have the accesstoken of the user in my hand.only I am confused on sending process.
Source: (StackOverflow)
I am trying to get my friend name and ids with graph api v2.0,
but data returns empty:
{
"data": [
]
}
when I was using v1.0, everything was ok with following request:
FBRequest* friendsRequest = [FBRequest requestForMyFriends];
[friendsRequest startWithCompletionHandler: ^(FBRequestConnection *connection,
NSDictionary* result,
NSError *error) {
NSArray* friends = [result objectForKey:@"data"];
NSLog(@"Found: %i friends", friends.count);
for (NSDictionary<FBGraphUser>* friend in friends) {
NSLog(@"I have a friend named %@ with id %@", friend.name, friend.id);
}
}];
but now I cannot get friends!
Source: (StackOverflow)
I'm trying to make login with Facebook available in my script. I've done everything, but when I attempt to login with a Facebook account I get this error from Facebook:
Error
App Not Setup: The developers of this app have not set up this app properly for Facebook Login.
Here's error screenshot:
Any ideas?
Source: (StackOverflow)
I am using Authlogic-Connect for third party logins. After running appropriate migrations, Twitter/Google/yahoo logins seem to work fine but the facebook login throws exception:
SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed
The dev log shows
OpenSSL::SSL::SSLError (SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed):
app/controllers/users_controller.rb:37:in `update'
Please suggest..
Source: (StackOverflow)
Goal:
Allow a user to authentication with Facebook into an iOS application which requires access to a protected web service that I'm running.
Assumptions:
There is a native authentication (and registration) system in place for those users that opt not to use Facebook for sign in.
Details:
- Assume we want to offer the option for a user to sign in with Facebook without creating a separate account/credential for our system.
- Because we support our own native auth mechanism (username and password) we have our own user IDs and issue an authentication token that is used for subsequent interactions after the initial credential validation.
I'm surprised that Facebook doesn't have best practices for this in their developer documentation. All the existing documentation is either assuming you are building FB auth into a website, or a standalone mobile app with no service that requires authentication.
Here's my initial thoughts on how this would be designed but want validation on whether it's correct.
- Client pops the Facebook iOS Login
- UI User signs in with Facebook credentials and gets access token
- iOS App passes access token to our server
Our server talks to FB graph API using access token to (a) validate the token and (b) get the FB user ID for that access token.
e.g. Our server would call https://graph.facebook.com/me/?access_token=XYZ which would return profile info in a JSON object
Assuming it's valid, our server extracts the User ID from the JSON object and checks whether the user already has an account. If so, we issue our own auth ticket to client to use for that session. If user doesn't have an account, we create a new one with the Facebook User ID, assign our own unique UserID and issue our auth ticket.
- Client then passes auth ticket back on subsequent interactions that need authentication.
This seems like the right approach to me but not sure if I'm missing something insanely basic and going down the wrong (complicated) path.
Source: (StackOverflow)
First -- I do not believe this is a duplicate issue. I've searched for same or similar problems on SO extensively, and due to the nature of troubleshooting before asking, I believe this problem is unique.
Facebook cannot grasp my og:image files and I have tried every usual solution. I'm beginning to think it might have something to do with https://...
- I have checked http://developers.facebook.com/tools/debug and have zero warnings or errors.
- It is finding the images we linked to in the "
og:image", but they're showing up blank. When we click the image(s), however, they DO exist and it takes is straight to them.
- It DOES show one image -- an image hosted on a non-https server.
- We've tried square images, jpegs, pngs, larger sizes and smaller sizes. We've put the images right in public_html. Zero are showing up.
- It's not a caching error, because when we add another
og:image to the meta, FB's linter does find and read that. It DOES show a preview. The preview is blank. The only exception we're getting is for images that are not on this website.
- We thought maybe there was some anti-leach on
cpanel or the .htaccess that was preventing the images from showing up, so we checked. There was not. We even did a quick < img src="[remote file]" > on an entirely different server and the image shows up fine.
- We thought maybe it was the
og:type or another oddity with another meta tag. We removed all of them, one at a time and checked it. No change. Just warnings.
- The same code on a different website shows up without any issue.
- We thought maybe it was not pulling images because we're using the same product page(s) for multiple products (changing it based on the get value, ie, "details.php?id=xxx") but it's still pulling in one image (from a different url).
- Leaving any
og:image or image_src off, FB does not find any images.
I am at the end of my rope. If I said how much time myself and others have spent on this, you'd be shocked. The issue is that this is an online store. We absolutely, positively cannot NOT have images. We have to. We have ten or so other sites... This is the only one with og:image problems. It's also the only one on https, so we thought maybe that was the problem. But we can't find any precedent anywhere on the web for that.
These are the meta-tags:
<meta property="og:title" content="[The product name]" />
<meta property="og:description" content="[the product description]" />
<meta property="og:image" content="https://www.[ourwebsite].com/images/shirts/overdriven-blues-music-tshirt-details-black.png" />
<meta property="og:image" content="https://www.[ourwebsite].com/images/shirts/overdriven-blues-music-tshirt-art-black.png" />
<meta property="og:image" content="http://www.[ADIFFERENTwebsite].com/wp-content/uploads/2011/06/ARS-Header-Shine2.png" />
<meta property="og:image" content="https://www.[ourwebsite].com/images/ARShopHeader.png" />
<meta property="og:image" content="http://www.[ourwebsite].com/overdriven-blues-music-tshirt-art-black.JPG" />
<meta property="og:type" content="product"/>
<meta property="og:url" content="https://www.[ourwebsite].com/apparel-details.php?i=10047" />
<meta property="og:site_name" content="[our site name]" />
<meta property="fb:admins" content="[FB-USER-ID-NUMBER]"/>
<meta name="title" content="[The product name]" />
<meta name="description" content="[The product description]" />
<link rel="image_src" rel='nofollow' href="https://www.[ourwebsite].com/images/shirts/overdriven-blues-music-tshirt-details-black.png" />
<meta name="keywords" content="[four typical keywords]">
<meta name="robots" content="noarchive">
In case you want it, here's a link to one of our product pages that we've been working on. [Link shortened to try to curb this getting into search results for our site]: http://rockn.ro/114
EDIT ----
Using the "see what facebook sees" scraper tool, we were able to see the following:
"image": [
{
"url": "https://www.[httpSwebsite].com/images/shirts/soul-man-soul-music-tshirt-details-safari.png"
},
{
"url": "https://www.[httpSwebsite].com/images/shirts/soul-man-soul-music-tshirt-art-safari.png"
},
{
"url": "http://www.[theotherNONSECUREwebsite].com/wp-content/uploads/2011/06/ARS-Header-Shine2.png"
}
],
We tested all links it found for a single page. All were perfectly valid images.
EDIT 2 ----
We tried a test and added a subdomain to the NONSECURE website (from which images are actually visible through facebook). Subdomain was http://img.[nonsecuresite].com. We then put all images into the main subdomain folder and referenced those. It would not pull those images into FB. However, it would still pull any images that were referenced on the nonsecure main domain.
POSTED WORKAROUND ----
Thanks to Keegan, we now know that this is a bug in Facebook. To workaround, we placed a subdomain in a different NON-HTTPS website and dumped all images in it. We referenced the coordinating http://img.otherdomain.com/[like-image.jpg] image in og:image on each product page. We then had to go through FB Linter and run EVERY link to refresh the OG data. This worked, but the solution is a band-aid workaround, and if the https issue is fixed and we go back to using the natural https domain, FB will have cached the images from a different website, complicating matters. Hopefully this information helps to save someone else from losing 32 coding hours of their life.
Source: (StackOverflow)
I'm aware that there are many questions about Facebook access-tokens and the grief they cause, but despite much experimentation and reading many frustratingly vague blog articles (FB and otherwise), I'm still struggling to get a clear answer to my needs. Let me succinctly break down my process so far:
- I am creating a site that, server-side, needs to pull the posts/statuses from a single Facebook Page
- I am an admin of that Facebook Page
- I have created a Facebook App
- Using the Facebook Graph API Explorer, I've generated a short-lived key, connected to my app and my account, that grants permission to my account to view the access-tokens for my pages
- I've converted my short-lived key to a long-lived key (60 days) ala scenario 4 from this
And here's where I am stuck. My 60 day key works fine for my server to pull the info needed from the page, but as far I can tell, there's no way to programmatically extend that 60 day key. I also do not know of a way to generate a new short-lived key without manually going to the Facebook Graph API Explorer and creating one.
Since it is my server making the requests to the Facebook API and not a user-based system (where I could easily request that a user authorize the Facebook app again), this creates a very clunky system. Since Facebook deprecated offline_access, is there really no permanent way to have my server pull info from my own page? Will I really have to create a new key by hand and manually update my server with it every 60 days?
Or is there something I'm missing?
Update:
The step-by-step guide that was previously found here has been migrated down into its own answer.
Source: (StackOverflow)
I am getting this warning while submitting app to the Apps store through organizer.
The app references non-public selectors in Payload/.app/: decoder
i know we get this warning if we use any Third Party API in our application. I have used SOCKETIO-ObjC library for chat functionality in application. Also used facebook iOS sdk for fb implementation.So i am not getting exactly what causes this warning.! Please find attached ScreenShot for better understanding
Source: (StackOverflow)
Using the Graph API I'd like to be able to have an authorized user "like" a page.
I tried posting the following
https://graph.facebook.com/${PAGE_ID}/likes?access_token=${ACCESS_TOKEN}
And I get an HTTP error 500 accompanied by "Invalid post_id parameter" in the JSON response body. Looks like the /likes resource is suited to liking a wall post and not a page. How do I get this to work with a page?
Source: (StackOverflow)
I would like to display the users profile picture inside of my applications canvas page, is there a way to do that using the graph api?
I know I can do it using FBML but I would also like to pass the profile pic to a flash game I am making, so I would have to get the profile pic from the api and send it as a variable, here is the code I have thus far,
$facebook = new Facebook(array(
'appId' => FACEBOOK_APP_ID,
'secret' => FACEBOOK_SECRET_KEY,
'cookie' => true,
'domain' => 'myurl/facebook-test'
));
$session = $facebook->getSession();
$uid = $facebook->getUser();
$me = $facebook->api('/me');
$updated = date("l, F j, Y", strtotime($me['updated_time']));
echo "Hello " . $me['name'] . $me['picture'] . "<br />";
echo "<div style=\"background:url(images/bg.jpg); width:760px; height:630px;\">" . "You last updated your profile on " . $updated . "</div>" . "<br /> your uid is" . $uid;
$me['picture'] does not seem to be working, but I am still very new to the graph api, and I am probably making a few very amateur mistakes!
Thanx in advance!
Source: (StackOverflow)
I have a Facebook Page that I want to get some things from it. First thing are feeds and from what I read they are public (no need for access_token). But I want to also get the events... and they aren't public and need the access_token.
I don't want the user to login in Facebook or anything like that. I just want to push all the data I can from this only page. That's why I already discarded many examples I found here and the one at https://developers.facebook.com/blog/post/500/ , because they want the user to login or require some user action I'm not interessed.
What I want is that my Facebook Application have full authorization and access_token to push the data from this one Facebook Page that I own (admin). Is this possible? I already tried many things but nothing seems to work.
I tried clicking at this: https://www.facebook.com/dialog/oauth?client_id=150635421702954&redirect_uri=http://MY_URL/&scope=manage_pages&response_type=token&fields=access_token - changing MY_URL to my site's and it requests authorization to edit every page I own. Even not being what I want I clicked but had no access_token in return...
Could someone please help me?
Greatly appreciated, thank you :)
Source: (StackOverflow)
Since the offline_access Permission is deprecated in Facebook's Authentication flow, we have problem geting the so called long lived access tokens without that permission.
In Facebook's document about the deprecation it says, that server side OAuth generated access tokens will be long lived, but they are not.
Am I missing something? Some setting in app settings? Some special code I need to use to extend expiration time of access tokens? As I understand the documentation, for server side authentication, the access token wich can be accessed by getAccessToken() method of PHP SDK when the user is logged in is long lived.
Source: (StackOverflow)
I'm building an app that allows users to administrate their Facebook Fan Pages. This requires the following two Access Tokens:
- A User Access Token
- A Page Access Token
I'm quite familiar with User Access Tokens, but not with Page Access Tokens.
Does anybody know how long the Page Access Token remains valid? All I can find on the Facebook website is this succinct paragraph, which doesn't mention anything about it's expiry.
Can I assume that if I am requesting the User Access Token with the offline_access permission the Page Access Token will also last indefinitely (unless the user changes their password or manually deauthorises my app)?
I'm asking because I want to know how often I should query the Facebook Graph API and acquire Page Access Tokens. Should I simply request them once when the user registers? Or should I request them one each API Call in the event they continuously change? The latter is obviously more taxing!
Source: (StackOverflow)
I'm using the Graph API, but I can't figure out how to get a logged-in users email address.
The intro to Graph states "The Graph API can provide access to all of the basic account registration data you would typically request in a sign-up form for your site, including name, email address, profile picture, and birthday"
All well and good, but how do I access that info?
This is what I have so far:
$json = $facebook->api('/me');
$first = $json['first_name']; // gets first name
$last = $json['last_name'];
Source: (StackOverflow)