Added the extendAccessToken method to facebook-ios-sdk

Summary:
Whenever user makes an API call the SDK checks if the access token is about to
expire.  If that's the case SDK will try to silently refresh the token.
Developer can also force the refreshing process by calling [facebook
extendAccessToken] method (this might be useful for apps that doesn't make
frequent API calls). Also provided an example of this functionality in the
Hackbook.

Test Plan:
With prod: tried refreshing the token and check if the expirationDate is
correct.

With sandbox:
 - disabling checking the ssl certificates in the sdk (done by following lines
(src/FBRequest.m) - I'm sure there's an easier way, but I don't know it :P):

  LANG=C
  - (BOOL)connection:(NSURLConnection *)connection
canAuthenticateAgainstProtectionSpace:(NSURLProtectionSpace *)protectionSpace {
    return [protectionSpace.authenticationMethod
isEqualToString:NSURLAuthenticationMethodServerTrust];
  }
  - (void)connection:(NSURLConnection *)connection
didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge {
    if ([challenge.protectionSpace.authenticationMethod
isEqualToString:NSURLAuthenticationMethodServerTrust])
      [challenge.sender useCredential:[NSURLCredential
credentialForTrust:challenge.protectionSpace.serverTrust]
forAuthenticationChallenge:challenge];
    [challenge.sender
continueWithoutCredentialForAuthenticationChallenge:challenge];
  }

- changing the rest server url (in my case:)

  LANG=C
  static NSString* kRestserverBaseURL =
@"https://api.kamil.devrs332.facebook.com/method/";

- after that I switched to app which access expires after 10 minutes and tested
if the refreshing process behaves correctly (had to modify isSessionOld
function)

Reviewers: yariv, jimbru, brent, ekoneil

Reviewed By: yariv

CC: lshepard, ekoneil, jgabbard, brent, yariv, kamil, trvish

Differential Revision: https://phabricator.fb.com/D371702

Task ID: 823099
Merge remote-tracking branch 'origin/expiringAccessTokens'
Invalidate session only if access token errors when extending token

Summary:
Currently when there is a Platform API call that has any error or if there is a
connection error, e.g. timeout, the access token is invalidated. This was due
to
diff D378197 where any errors call invalidSession. To fix this narrow the
invalidate call to the scenario where the access token has expired when an API
call
is made.

For now, only REST API error codes allow us to easily identify an invalid token
(error code 190). A separate diff will be implemented by the Platform team
to provide an error code for Graph API auth token errors.

Test Plan:
Case #1
1/ Login
2/ Tap Graph API
3/ Tap Get your friends
4/ Go off LAN and WiFi
5/ Tap Get your friends

Case #2
1/ Turn WiFi back on
2/ Tap Get your friends
3/ See friends list
4/ Go back to get to Graph API page
5/ Remove app from https://www.facebook.com/settings/?tab=applications
6/ Tap Get your friends

Case #3
1/ Temporarily modified code to force a Graph API error
     //[[delegate facebook] requestWithGraphPath:@"me" andParams:params
andDelegate:self];
     [[delegate facebook] requestWithGraphPath:@"000000" andParams:params
andDelegate:self];
2/ Tap Graph API
3/ Tap Get your information

Before this change, here were the results
Case #1: Session expires message, which is incorrect behavior
Case #2: Session expires message, which is correct behavior
Case #3: Session expires message, which is incorrect behavior

After this change, here are the results
Case #1: Get the Hackbook "Oops something went wrong" message, which is desired
behavior
Case #2: Get the Hackbook "Oops something went wrong" message, which is not
ideal, user should also be logged out
Case #3: Get the Hackbook "Oops something went wrong" message, which is desired
behavior

Reviewers: yariv, jimbru, brent, toddkrabach, jonathan

Reviewed By: yariv

CC: lshepard, selekman, beau, bgolub, danmuriello, jacl

Differential Revision: https://phabricator.fb.com/D402481

Revert Plan: OK

Task ID: 900407
Fixes breaking change introduced by  (e79d072)

Summary:
The problem is that e79d072 fixes odd behavior in Hackbook,
which had support in the SDK code’s logout function. Prior to e79d072
Hackbook was more convoluted, and the logout behavior broke
encapsulation. The solution is to put back a deprecated logout method that
matches the original signature, and keeps most of the original behavior
(though it does not break encapsulation, which was badness.)

Test Plan:
Manually modify Hackbook, and whitebox test each of the following
permutations:
* login with no delegate (call the cached delegate)
* login with a delegate matching the cached delegate (call the cached delegate)
* login with a delegate different from the cached delegate (call both)

Reviewers: yariv, caabernathy, mmarucheck, vijaye

Reviewed By: yariv

Differential Revision: https://phabricator.fb.com/D405235

Task ID: 905137
Provide developers script they can use to get a static library version of the
iOS SDK

Summary:
For developers who are building apps with Automatic Reference Counting
enabled using our current iOS SDK will produce errors. One solution is to
provide a static library version of our SDK that they can include in their
project. We could provide detailed documentation to do this but it is easier to
provide a script that they can run. This diff introduces this script. We
considered actually packaging the desired library with the SDK but that would
involve a process change on our end because the current SDK development flow
does not include building a library. So for now we will push this on the
developer and perhaps in the future look at a more streamlined way to provide
this library to the developer.

Additionally, needed to make sure deployment target was set to iOS 3 for the
project.

Test Plan:
In terms of testing the script just run it a few times from various initial
locations, e.g.
% sh
/Users/caabernathy/Facebook/Code/iOS/StaticScriptTest/facebook-ios-sdk/scripts/build_facebook_ios_sdk_static_lib.sh

Also run it twice to see the output library properly overwritten

Once the library was produced, tested it worked well by doing the following
Scenario 1: Use the library with an app that does not have ARC enabled
1/ Built a simple app with Facebook SSO and a news feed dialog
2/ Tested SSO works and that the dialog UI has all the relevant resources and
works

Scenario 2: Use the library with an app with ARC enabled
1/ Built a simple app with Facebook SSO and a news feed dialog. (When creating
this app, made sure ARC was turned on)
2/ Tested SSO works and that the dialog UI has all the relevant resources and
works

Scenario 3: Switch out the Facebook SDK in the Hackbook sample app with this
library
1/ Removed the FBConnect folder from the Hackbook sample app
2/ Dragged in the new library, chose to copy the contents over
3/ Ran the app and went through all the flows. Note: Found some cases that do
not work that also appear to be broken in the current app, namely video upload,
and recent check-ins listing. These can be addressed separately.

Reviewers: yariv, jacl

Reviewed By: jacl

CC: mmarucheck, vijaye, selekman, brent

Differential Revision: https://phabricator.fb.com/D415047

Revert Plan: OK
Adds frictionless apprequest support

Summary:
Here are the mods to the sdk:
1. adds four methods to the Facebook class, for use by applications
  * enableFrictionlessRequests
  * reloadFrictionlessRecipientCache
  * isFrictionlessEnabledForRecipient
  * isFrictionlessEnabledForRecipients
2. extends dialog method and support class to support frictionless behavior for “apprequest” dialogs
3. extends Hacbook sample to add frictionless app-request support

Notes:
* enableFrictionlessRequests method of FBFrictionless turns on frictionless apprequest behavior in the SDK
* frictionless apprequest behavior means
  a.) a cache of allowed frictionless recipients is maintained
  b.) cache checked by dialog, and dialog is invisible for frictionless recipients
  c.) send responses are checked and recipient list is updated
  d.) logout and login cause clear and refetch of cache respectively
Added FBFrictionlessRequestSettings.m to the xcode project
Merge pull request #440 from alvarezm50/master

FBFrictionlessRequestSettings.m is missing from xcode project
Fixes url parsing bug -- reenables in-app auth flow

Summary:
Introduced a bug in URL parsing with the frictionless fix, which
failed to recognize urls that begin the parameter section with #

Test Plan:
Whitebox test using hackbook to force the in-app auth flow, and
confirm that the new line enables parsing of the returned URL

Reviewers: yariv, caabernathy, mmarucheck, vijaye

Reviewed By: mmarucheck

Differential Revision: https://phabricator.fb.com/D425267
Fix issue causing blank white dialog when loading friends list

Summary:
Set the UIActivityIndicator color to gray to stop it from blending into the background.
On iOS5 we do this by setting the color to gray. On older iOS versions which don't support this
property, this is done by setting the style to UIActivityIndicatorViewStyleGray instead of
UIActivityIndicatorViewStyleWhiteLarge which results in a slightly smaller indicator.

Test Plan: Testing using Hackbook.

Reviewers: jacl, dgibson

Reviewed By: jacl

Differential Revision: https://phabricator.fb.com/D426894

Task ID: 908016
Use [NSDictionary objectForKey:] instead of [NSDictionary valueForKey:] to access objects in dictionaries

Summary: valueForKey also works in this case since none of our keys are strings staring with "@". However, objectForKey: is the correct selector to use for the desired behavior.

Test Plan: Verify behavior with HackBook app

Reviewers: jacl, dgibson

Reviewed By: jacl

Differential Revision: https://phabricator.fb.com/D427850

Task ID: 854847
Fix a bug that caused request: didLoad: to be called with the raw response instead of a string when the response does not represent a valid JSON object.

Summary:
If the response is not a JSON object, convert the actual response to a string instead of using the NSData object.
This will break clients that depend on the current behavior. If you need access to the raw response, use request: diReceiveResponse: instead.

Test Plan: Test with stream.publish requests

Reviewers: jacl, dgibson, yariv, caabernathy

Reviewed By: jacl

CC: leon

Differential Revision: https://phabricator.fb.com/D427844

Task ID: 842334
Fix memory leaks in Hackbook

Summary:
1) img was alloc'ed and never released while uploading a photo
2) alertview was alloc'ed and never released
3) friendswithapp was alloc'ed twice and never released, updated the logic to use obj c syntax
4) UIGraphicsGetImageFromCurrentImageContext() returns an autoreleased imageView - retaining it is the incorrect solution. See http://stackoverflow.com/questions/1529667/memory-allocation-and-release-for-uiimage-in-iphone

Test Plan:
Run Hackbook in the profiler and verify no memory leaks when loading userpic from the graph api
Upload a photo, verify no longer leaks
View friends with app, verify no longer leaks
Pop the alertview and verify no longer leaks

Reviewers: jacl, caabernathy, mattwkelly, selekman

Reviewed By: jacl

Differential Revision: https://phabricator.fb.com/D430905

Task ID: 980129
Fix Xcode build path in the static lib build script for Xcode 4.3.1+ or version downloaded from App Store

Summary: Previously xcodebuild could be found under the /Developer directory but it has since moved for Xcode downloaded from the App Store. If the developer has migrated from one version to another, then calling "which xcodebuild" will not work, unless they have run a script called "xcode-select switch". So for now we first check the older location, then look in the newer App Store location.

Test Plan: I tried running the build script in my folder after a recent upgrade from 4.2 to 4.3.1. Without the build script change I got an error. With the build script change, the library was generated.

Reviewers: mmarucheck, bruce, jacl

Reviewed By: jacl

CC: selekman, vijaye, jacl, gregschechte

Differential Revision: https://phabricator.fb.com/D440943

Revert Plan: OK

Task ID: 998703
Rolling up a few pull requests -- thanks!

Summary:
This diff rolls-up the following pull request -
  * 449      - SevaUA
  * 446, 445 - adamvduke
  * 435      - deyton

Test Plan: manual, used hackbook to exercise impacted code

Reviewers: yariv, mmarucheck, vijaye, caabernathy

Reviewed By: vijaye

CC: gregschechte, selekman

Differential Revision: https://phabricator.fb.com/D448786

Task ID: 1021338, 981999
Fixes a recursion bug introduced in the previous diff

Summary:
Reverting the portion of the previous diff that attempted to reuse a reference as a bool,
given that the reference is assigned to late to be used to short-circuit recursion
Fixes string comparison defect

Summary: summary says it all

Test Plan: a little white-box testing with hackbook

Reviewers: mmarucheck, caabernathy, yariv

Reviewed By: mmarucheck

Differential Revision: https://phabricator.fb.com/D457449