LinkedIn Invitation API error 401 [unauthorized]-iPhone sdk - iphone

Question

I am using OAuth-Sample-Client code to send invitation from email address via Linked Invitation API.
I have created the same body as described in developer site,but right now I am getting error of 401,I have searched a lot of on it but didn't get any solution which get me out of it from any site or forum.
My response is as below.
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<error>
<status>401</status>
<timestamp>1351159386437</timestamp>
<request-id>YX4NRU3S7J</request-id>
<error-code>0</error-code>
<message>[unauthorized]. OAU:ron8e8nko3te|e0a96317-dfdc-44fb-b427-5655e02f97ed|*01|*01:1351159294:dRCDN6b3K9F/mwWAaByKZQPgeVw=</message>
</error>
Here my json string would be like this:
{"body":"Say yes!","subject":"Invitation to
connect.","recipients":{"values":[{"person":{"first-name":"test","last-name":"test","_path":"/people/email=test#test.com"}}]},"item-content":{"invitation-request":{"connect-type":"friend"}}}
I have used the code as below to send Invitation.
- (IBAction)postButton_TouchUp:(UIButton *)sender
{
[statusTextView resignFirstResponder];
NSURL *url = [NSURL URLWithString:#"http://api.linkedin.com/v1/people/~/mailbox"];
OAMutableURLRequest *request =
[[OAMutableURLRequest alloc] initWithURL:url
consumer:oAuthLoginView.consumer
token:oAuthLoginView.accessToken
callback:nil
signatureProvider:[[OAHMAC_SHA1SignatureProvider alloc] init]];
[request setValue:#"application/json" forHTTPHeaderField:#"Content-Type"];
NSDictionary *temp=[[NSDictionary alloc]initWithObjectsAndKeys:#"/people/email=test#test.com",#"_path",#"test",#"first-name",#"test",#"last-name", nil];
NSDictionary *temp2=[[NSDictionary alloc] initWithObjectsAndKeys:temp,#"person",nil];
NSArray *arr2=[[NSArray alloc]initWithObjects:temp2, nil];
NSDictionary *value=[[NSDictionary alloc]initWithObjectsAndKeys:arr2,#"values", nil];
NSDictionary *dict3=[[NSDictionary alloc]initWithObjectsAndKeys:#"friend",#"connect-type",nil];
NSDictionary *dict4=[[NSDictionary alloc] initWithObjectsAndKeys:dict3,#"invitation-request", nil];
NSDictionary *dict=[[NSDictionary alloc]initWithObjectsAndKeys:dict4,#"item-content",#"Say yes!",#"body",#"Invitation to connect.",#"subject",value,#"recipients", nil];
NSLog(#"%#",[dict description]);
NSString *updateString = [dict JSONString];
[request setHTTPBodyWithString:updateString];
[request setHTTPMethod:#"POST"];
OADataFetcher *fetcher = [[OADataFetcher alloc] init];
[fetcher fetchDataWithRequest:request
delegate:self
didFinishSelector:#selector(postUpdateApiCallResult:didFinish:)
didFailSelector:#selector(postUpdateApiCallResult:didFail:)];
[request release];
}
I got stuck at this point,Please get me out of this.
-Thanks in advance

Answer 1

call prepare method of OADataFetcher manually. Just put it before setting the body of the request.
[request prepare];
[request setHTTPBodyWithString:updateString];
This is working for me.
Also remove the prepare method from the OADataFetcher when you are working with Invitation API.

Answer 2

Apple's code works! Just one more thing, dont forget any header. I was still getting the same message, turns out I forgot to add x-li-format and Content-type headers.

Answer 3

I got the solution from this Linkedin thread
You just need to make a few changes in the code:
NSURL *url = [NSURL URLWithString:#"http://api.linkedin.com/v1/people/~/mailbox"];
OAMutableURLRequest *request =
[[OAMutableURLRequest alloc] initWithURL:url
consumer:oAuthLoginView.consumer
token:oAuthLoginView.accessToken
callback:nil
signatureProvider:nil];
[request setHTTPMethod:#"POST"];
NSString *messageToPerson = #"/people/email=target#gmail.com";
NSDictionary *person = [[NSDictionary alloc] initWithObjectsAndKeys:[[[NSDictionary alloc] initWithObjectsAndKeys:messageToPerson,#"_path",#"TargetFirstName",#"first-name",#"TargetSecondName",#"last-name",nil] autorelease], #"person",nil];
NSArray *valueArray = [[NSArray alloc] initWithObjects:person,nil];
NSDictionary *values = [[NSDictionary alloc] initWithObjectsAndKeys:valueArray,#"values", nil];
NSDictionary *ir = [[NSDictionary alloc] initWithObjectsAndKeys:[[[NSDictionary alloc] initWithObjectsAndKeys:#"friend",#"connect-type",nil] autorelease], #"invitation-request",nil];
NSDictionary *ic = [[NSDictionary alloc] initWithObjectsAndKeys:ir,#"item-content", nil];
NSDictionary *update = [[NSDictionary alloc] initWithObjectsAndKeys:values,#"recipients",#"Invitation",#"subject",#"ConnectWithMe",#"body", ir, #"item-content", nil];
[request setValue:#"json" forHTTPHeaderField:#"x-li-format"];
[request setValue:#"application/json" forHTTPHeaderField:#"Content-Type"];
NSLog(#"%#",[update description]);
NSString *updateString = [update JSONString];
[request prepare];
[request setHTTPBodyWithString:updateString];
OADataFetcher *fetcher = [[OADataFetcher alloc] init];
[fetcher fetchDataWithRequest:request delegate:self
 didFinishSelector:#selector(postUpdateApiCallResult:didFinish:)
 didFailSelector:#selector(postUpdateApiCallResult:didFail:) withId:1];
[request release];
and in oAdata OADataFetcher.m
- (void)fetchDataWithRequest:(OAMutableURLRequest *)aRequest delegate:(id)aDelegate didFinishSelector:(SEL)finishSelector didFailSelector:(SEL)failSelector withId:(int)idtm
 {

 [request release];
request = [aRequest retain];

 delegate = aDelegate;
didFinishSelector = finishSelector;

 didFailSelector = failSelector;
//note this change

 if (idtm!=1) {

 [request prepare];
}
connection = [[NSURLConnection alloc] initWithRequest:aRequest delegate:self];
}
Try this. Will work for sure. Hope this will help future visitors.
Regards