How to get the bigger profile picture of a facebook page

Question

I am getting an image from facebook by the URL: http://external.ak.fbcdn.net/safe_image.php?d=d282e1e7c86c9270232f97ddc737df39&w=90&h=90&url=http%3A%2F%2Fi52.tin

Answer 1

YES, there is a way to get the original (most of time bigger) profile picture of a facebook page.

Actually the answer is already in the question. The original image url is already embedded in the save_image url. In your case it is "url=http%3A%2F%2Fi52.tinypic.com%2F2q0ixzl.jpg” which means "http://i52.tinypic.com/2q0ixzl.jpg"

In my case, the page for London is

https://www.facebook.com/pages/London-United-Kingdom/106078429431815?fref=ts

I can easily get its fb object id by search keyword London. I have tried to use width and height parameter. They work with user profile picture or user shared picture but can’t work with public pages profile picture.

https://graph.facebook.com/106078429431815/picture?width=300&height=300  // can’t work

The largest picture I can get it by following url which is only 180x77

https://graph.facebook.com/106078429431815/picture?type=large

But I can get safe_image.php url by using fb graph api, and the original image url is also inside the parameters' url section

"url": "https://fbexternal-a.akamaihd.net/safe_image.php?d=AQCrtKykRotXBuaS&w=180&h=540&url=http%3A%2F%2Fupload.wikimedia.org%2Fwikipedia%2Fcommons%2Fthumb%2Farchive%2F2%2F21%2F20141005220235%2521City_of_London_skyline_at_dusk.jpg%2F720px-City_of_London_skyline_at_dusk.jpg&fallback=hub_city&prefix=d"

Here is code I used.

[FBRequestConnection startWithGraphPath:[NSString stringWithFormat:@"/%@/picture?redirect=false&type=large",[firstCityPage objectForKey:@"id"]]
                    completionHandler:^(
                                        FBRequestConnection *connection,
                                        id result,
                                        NSError *error
                                        ) {

                        NSString *profileImgUrl = [NSString stringWithFormat:@"http://graph.facebook.com/%@/picture?type=large", [firstCityPage objectForKey:@"id"]];

                        if (error==nil) {
                            NSString *fbSaveImgUrl = [[(NSDictionary*)result objectForKey:@"data"] objectForKey:@"url"];

                            NSURLComponents *urlComponents = [NSURLComponents componentsWithURL:[NSURL URLWithString:fbSaveImgUrl]
                                                                        resolvingAgainstBaseURL:NO];

                            for (NSURLQueryItem *queryItem in urlComponents.queryItems) {
                                if ([queryItem.name isEqualToString:@"url"]) {
                                    profileImgUrl = queryItem.value;
                                    break;
                                }
                            }

                        } else {
                            NSLog(@"%@",[error description]);
                        }

                        NSLog(@"url: %@", profileImgUrl);

                        ...
                    }];

BUT, there are risks.

1. No guarantee the external image url will be validate.

2. Facebook may remove the explicit external url in the safe_image url or hide the safe_image url from developer in future.

Use it at your own risk.