How do i use Facebook API to post only on my page? - facebook

As i understand, i need to validate my person, wait for my app review etc.
But what if i just need to post only on my page and nowhere else? Someone told me that i just have to be an app and page administrator and i even can leave app in dev mode but it didn't work for me. In all cases i just recieve
If posting to a group, requires app being installed in the group, and either publish_to_groups permission with user token, or both manage_pages and publish_pages permission with page token; If posting to a page, requires both manage_pages and publish_pages as an admin with sufficient administrative permission
Is it any way to skip all these checks and use API for posting? If not, can you tell me some free services i can use to reach this with? Much thanks for answers.

If you are posting to a page (any page) you need a token with manage_pages and publish_page.
You can generate a test token using the explorer: https://developers.facebook.com/tools/explorer/ - but this token is short lived (1h)
Using the short term token in the explorer, you can get a list of your pages (endpoint: /me/accounts) that you manage and that list will contain a page_token for each page you manage.
With that page_token you can post to the page.
You can put the page_token into the Access token debugger to see it's permissions.
https://developers.facebook.com/tools/debug/accesstoken/
You need approvals if you are putting the app live and allowing non-developers access to it.

Related

Are Facebook App publish_pages permissions required for my personal API access?

I am trying to automate posting to my Facebook Business page. FB is forcing me to get an app review to approve the manage_pages and publish_pages permissions. I am not making an app for any other users, it is just for me.
Is there a way to avoid app review since I am not creating a public app?
When I try to use my user token (I am a page admin) in the API call it gives me the permission not available error. I can publish using the page token in Dev mode, (which makes all the posts hidden).
Sorry, this isn't a specific code question, If there is a better place to post this I will move it.
When I use my user token:
(#200) The permission(s) publish_actions are not available. It has been deprecated. If you want to provide a way for your app users to share content to Facebook, we encourage you to use our Sharing products instead.
When I use my page token:
(#200) The permission(s) manage_pages,publish_pages are not available. It could because either they are deprecated or need to be approved by App Review.

Error on posting on behalf of a Facebook page

I have an app that programmatically make post on a configured Facebook Page.
My app obviously have both the manage_pages and publish_pages permissions approved and I'm using pages access token
Everything work well since now, but recently when I POST on page feed
https://graph.facebook.com/v3.1/234002440799692/feed
I get this error:
{"error": {
"message":"(#200) Requires either publish_to_groups permission and app being installed in the group, or manage_pages and publish_pages as an admin with sufficient administrative permission",
"type":"OAuthException",
"code":200,
"fbtrace_id":"HEVcI\/Tq3fW"
}}
I know that Facebook has deprecated publish_actions scope, so that it's not possible anymore to post programmatically on the personal feed, but I can't find out why the post on a page return this kind of error.
Some further infos:
posting with a developer account actually work
the user by which the page access token is obtained, created the page on Facebook (so I think it's an admin for the page)
i recently migrated from graph_api v2.12 to v.3.1
Any suggestion will be appreciated
Thanks
I figured it out what the problem with some pages is.
It seem that now, if the user grant the manage_pages and publish_pages permission, that will be valid only for already existing pages!
New pages haven't the permission granted by default.
The only way I can fix the problem was to remove my app from the user profile (Facebook Settings > Business Integrations > Select the app > Remove) and then prompt the user again with the Facebook OAuth permission dialog.
I don't know if there is a way to force the app removal programmatically, but I can't find out.
You can use the following URL:
https://graph.facebook.com/v7.0/234002440799692/feed?&access_token={access_token}

Unable to post to facebook page using app token

I am building my first facebook app and am facing a issue.
Task : Build a entirely server side application to be used by the admin of a facebook page to post videos/photos on the page. This should not involve having the admin to log in everytime to generate the user acess and page access token.
What I found : Based on the requirement, I found that app tokens can be used for this purpose. This line specifically hints at the usefulness.
App access tokens can also be used to publish content to Facebook on behalf of a person who has granted an open graph publishing permission to your application
I think that using this will be safe since mine is an entirely server side app.
Problem The docs say that:
GET /oauth/access_token?
client_id={app-id}
&client_secret={app-secret}
&grant_type=client_credentials
will give the app token that can be used in place of user access token.
However, I have not been able to do so. Specifically the error encountered is
Error 200 .The user must have accepted the TOS. Since I have already tried publishing content with page access token, I know this is a permission issue.
The following line
a person who has granted an open graph publishing permission to your application.
does not clarify everything. I came across a related question, but the answers seem to be a bit vague.
It would be really great if someone could give me insights about how this can be achieved.
In order to post to a page, you need at least authorize with the manage_pages permission. If you want to post "as user", you need to add publish_actions and use a "User Access Token". If you want to post "as page", you need to add publish_pages and use a "Page Access Token".
Information about how to generate those Tokens:
https://developers.facebook.com/docs/facebook-login/access-tokens
http://www.devils-heaven.com/facebook-access-tokens/
The error message with the TOS has been discussed a lot of times already, please go to those threads (or find a lot more with the search function):
(OAuthException) (#200) User must have accepted TOS on C# - Facebook
How come I get a "must have accepted TOS" error for test users with app installed?
facebook long term token "(#200) User must have accepted TOS"
Occassional (OAuthException - #200) (#200) User must have accepted TOS
You cannot post to a Page via an App Access Token. This is clearly stated in the docs at
https://developers.facebook.com/docs/graph-api/reference/v2.3/page/feed#publish
A user access token with publish_actions permission can be used to publish new posts on behalf of that person. Posts will appear in the voice of the user.
A page access token with publish_pages permission can be used to publish new posts on behalf of that page. Posts will appear in the voice of the page.
I'd recommend to use a eternal Page Acess Token, so there's no obligation to renew the User Access Token. Have a look at my answer here:
Post to a facebook page without "manage_pages" permission using php
See
https://developers.facebook.com/docs/facebook-login/access-tokens#pagetokens

granting minimal permissions during facebook "Login Flow for Web"

I have implemented a server-side login flow for a facebook page management application to allow my users to grant the necessary permissions to this application. So far, this works nicely and allows my application to obtain a "page access token" after being granted the manage_pages permission.
However, during the login flow, the facebook UI on facebook.com requests both the manage_pages permission (which is what I asked for) and the permission to see the list of friends of the user (which I did not ask for).
To be specific, I redirect the user to https://www.facebook.com/dialog/oauth?client_id=...&redirect_uri=...&state=...&response_type=code&scope=manage_pages.
Is there a way to convince the facebook UI to not request permission from the user to see his list of friends ?
For reference, since I spent a good amount of time researching an answer to that question, I believe that it is impossible to explicitely not request permission from the user to see his list of friends. The Facebook documentation hints at this by stating that these are the "default" permissions that every application gets.

How do I grant my app permissions on pages or groups I created?

I have an app, and I can write to user's walls with it, having requested the publish_stream permission when they sign in.
I've also created a page and a group, and would like my app to be able to write to those. (Specifically, I want my back-end server to post some updates to those periodically, without a user being involved.) The ability to do this seems to be implied by the descriptions of the /feed parts of those here https://developers.facebook.com/docs/reference/api/page/ and here https://developers.facebook.com/docs/reference/api/group/ . However, I can't seem to find a way to authorize the app to write to these pages. Those docs say it can be done if you have publish_streams and manage_pages. OK, but how do I grant those to my app?
In the user case, you request those permissions when the user signs in via the OAuth flow. However, the page and the group never sign-in, so there's no way for them to grant the app permission. I looked around the settings pages for the group and the page, and couldn't find anything that will let me add the app. So how do I give the app the required permissions to post to the group and the page?
Found it!
http://developers.facebook.com/docs/reference/api/application/
http://developers.facebook.com/docs/howtos/login/login-as-page/
"Application Page Access Tokens
To perform the following operations as an Application Page, and not the current user, you must use the Application's Page access token, not the user access token commonly used for modifying Graph API objects nor the Application access token. This access token can be retrieved by issuing an HTTP GET to /USER_ID/accounts with the manage_pages permission. This will return a list of Pages (including Application profile pages) to which the user has administrative access, along with an access_token for each Page.
Note: Applications that are configured as Native/Desktop apps will not be able to make API calls that require an application access_token."
So:
I went to http://developers.facebook.com/tools/explorer/ and, as me, created an access token with "manage_pages" permission.
I then went to https://graph.facebook.com/$myname/accounts?access_token=$accesstoken
and it gave me a list pages and apps that I had given permission to. I copied the access_token from the relevant page, and pasted that into my code, so that the server-side create event code always used that access token.
And it worked!