How to fetch gmail Contacts in iOS application using google contacts api? - objective-c

Question

In my application we kept option to login through gmail. I have requirement to retrieve gmail contacts.
In the following method i am using auth object(once success) to fetch gmail contacts by creating request with url: "https://www.google.com/m8/feeds/contacts/default/full"
- (void)finishedWithAuth:(GTMOAuth2Authentication *)auth
error:(NSError *)error {
if(!error) {
auth.clientID =myClientId;
auth.clientSecret =myClientSecret;
auth.scope= #"https://www.googleapis.com/auth/contacts.readonly";
NSString *urlStr = #"https://www.google.com/m8/feeds/contacts/default/full";
NSURL *url = [NSURL URLWithString:urlStr];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
[request setHTTPMethod:#"GET"];
[request setValue:#"3.0" forHTTPHeaderField:#"GData-Version"];
[auth authorizeRequest:request
completionHandler:^(NSError *error) {
NSString *output = nil;
if (error) {
output = [error description];
} else {
NSURLResponse *response = nil;
NSData *data = [NSURLConnection sendSynchronousRequest:request
returningResponse:&response
error:&error];
if (data) {
// API fetch succeeded :Here I am getti
output = [[NSString alloc] initWithData:data
encoding:NSUTF8StringEncoding];
NSLog(#"%#",output);
} else {
// fetch failed
output = [error description];
}
}
}];
}
}
I'm getting client error(401). is there any thing i'm missing to my request.

Answer 1

The correct Scope is "https://www.google.com/m8/feeds"
In swift
class func getContactsFromUser() {
let urlStr = "https://www.google.com/m8/feeds/contacts/default/full"
let url = NSURL(string: urlStr);
var request = NSMutableURLRequest(URL: url!)
let appd = UIApplication.sharedApplication().delegate as! AppDelegate
let error: NSError!
appd.service.authorizer.authorizeRequest!(request, completionHandler: { (error) -> Void in
if error != nil {
println("error getting contacts is \(error.localizedDescription)")
} else {
let response: AutoreleasingUnsafeMutablePointer<NSURLResponse?>=nil
let data = NSURLConnection.sendSynchronousRequest(request, returningResponse: response, error: nil)
if data != nil {
let stringResponse = NSString(data: data!, encoding: NSUTF8StringEncoding)
println("**** stringResponse **** \(stringResponse!)")
} else {
println("error 2 getting contacts is ")
}
}
})
}
In objective c
- (void)doAnAuthenticatedAPIFetch {
NSString *urlStr = #"https://www.google.com/m8/feeds/contacts/default/full";
NSURL *url = [NSURL URLWithString:urlStr];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
[self.auth authorizeRequest:request
completionHandler:^(NSError *error) {
NSString *output = nil;
if (error) {
output = [error description];
} else {
NSURLResponse *response = nil;
NSData *data = [NSURLConnection sendSynchronousRequest:request
returningResponse:&response
error:&error];
if (data) {
// API fetch succeeded :Here I am getti
output = [[NSString alloc] initWithData:data
encoding:NSUTF8StringEncoding];
} else {
// fetch failed
output = [error description];
}
}
}];
}