Showing posts with label app developer. Show all posts
Showing posts with label app developer. Show all posts

Saturday, February 2, 2013

Facebook tricks - Invite all your friends to your group, page and event

How to invite all of your friends to your :
  • Page
  • Group
  • Event
With just one click you can achieve this. Those who have many friends (+3000) and own groups, pages or events that promote a service, a cause or even a business will make a good use of this trick.

Note : This trick doesn't work with Firefox browser.

Just follow my leads as shown in this video below .



Here is the code I was talking about in the video .


More Facebook developers blogs :


Monday, November 12, 2012

Facebook developers - Bug : How to make link appears with image in Facebook post

When you post a link to Facebook.com timeline of yours or someone Else's or even a page or a group, you notice that your link shows up with a photo and sometimes it just doesn't.

Promoting your website or your product's link over Facebook through pages or groups require displaying some photos of what you are promoting even if you are not targeting a group of potential customers.


In my blog (http://www.evry1falls.blogspot.com/) I share news, and some posts do or don't have photos, but what really attracts audience to visit your story out of Facebook.com is the (ADS) advertisements links image, cause it adds credibility to your story, in case of blogger.com, the image is already there even if your post doesn't include one, the blog head-photo is always an option to choose.

I have another sub-domain (http://ahmedsamir.awardspace.com) or (http://evry1falls.co.cc) that doesn't have a header photo and some posts doesn't have a picture, so when i post, it looks like this :

Which is bad for business, so I've looked around and found this :
- It's a bug...... How ?
If you use Facebook.com link debugger you will know the reason why your image is not showing [Facebook Link Debugger], just paste your site Url and click on debug.
Examples of what you may get :



  1. Inferred Property: The 'og:url' property should be explicitly provided, even if a value can be inferred from other tags.
  2. Inferred Property: The 'og:title' property should be explicitly provided, even if a value can be inferred from other tags.
  3. Inferred Property: The 'og:description' property should be explicitly provided, even if a value can be inferred from other tags.
  4. Inferred Property: The 'og:image' property should be explicitly provided, even if a value can be inferred from other tags.
  5. Unable to download og:image: The image referenced by the url of og:image tag could not be downloaded.

from (1) to (4) is normal issues and could be easily resolved :
Just replace your meta tags [Title, Url, Description, Image] with codes like this :

<meta property = "og:title" content="Your_Site_Title" /> 
<meta property ="og:description" content="Your_Site_Description" /> 
<meta property = "og:url" content="Your_Site_Url" />
<meta property = "og:image" content="Path_to_Image_you_wish_to_see" />  'Note:must be at least 200px in both dimensions.

The (5) is the bug, whatever you do trying to fix this issue, you always get unlucky, until I've found that I'm not alone in this problem, and finally [It's a Bug]

I'll will keep looking arounf until i find a work around or a solution or facebook team solves it.

Solution Worked for me :
I uploaded the photo :
Format : (PNG) or (JPEG) 
Dimensions : 300x300 px (More than 250px)
Code : <Meta Property="og:image" id="myID" content="http://i50.tinypic.com/17r9jb.png" />
and it worked perfectly .

Sunday, October 2, 2011

Facebook application development Fatal error: Uncaught OAuthException: An active access token must be used

This Topic aplies to SDK 3.x
Subject ( Fatal error: Uncaught OAuthException: An active access token must be used )
The Answer to this problem could be found here : Link
But let's discuss it, shall we!
- There are 4 reasons why Tokens get expire :
  1. The token expires after expiration time (2 hours is the default).
  2. The user changes his/her password which invalidates the access token.
  3. The user DE-authorizes your app.
  4. The user logs out of Facebook.
I will not explain the 4 reasons but i will just post the script solution :
- If there is any question, just post a comment.
- i will get back here to try to explain the codes .

google me (evry1falls)