如何使用谷歌联系人API在iOS应用程序中获取Gmail联系人？

问题描述

在我的应用程序中，我们保留了通过Gmail登录的选项。我有要求检索Gmail联系人。

在以下方法中，我使用auth对象（一旦成功）通过使用url创建请求来获取gmail联系人：

$ b $ （$ 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：@3.0forHTTPHeaderField：@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获取成功：这里我是getti
output = [[NSString alloc] initWithData：data
encoding：NSUTF8StringEncoding];
NSLog（@％@，output）;
} else {
//获取失败
输出= [错误描述];
}
}
}];




$ b我得到客户端错误（401）。是否有任何东西我缺少我的请求。

解决方案

正确的范围是https： //www.google.com/m8/feeds

在swift中

  class func getContactsFromUser（）{
 let urlStr =https://www.google.com/m8/feeds/contacts/default/full
 let url = NSURL（string：urlStr）; 
 
 var request = NSMutableURLRequest（URL：url！）
 
让appd = UIApplication.sharedApplication（）。delegate as！ AppDelegate 
让错误：NSError！ 
 appd.service.authorizer.authorizeRequest！（request，completionHandler：{（error） - >无效
 
 if error！= nil {
 println（error getting contacts是\（error.localizedDescription））
} else {
 let response：AutoreleasingUnsafeMutablePointer< NSURLResponse？> = nil 
 
 let data = NSURLConnection.sendSynchronousRequest（request，returningResponseResponse ：response，error：nil）
 
 if data！= nil {
 let stringResponse = NSString（data：data !, encoding：NSUTF8StringEncoding）
 println（**** stringResponse **** \（stringResponse！））
} else {
 println（error 2 getting contacts is）
} 
} 
}） 
 
 
 
 
 
 $ b 
在目标c中
 
 
   - （void）doAnAuthenticatedAPIFetch {
 N SString * 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获取成功：这里我是getti 
 output = [[NSString alloc] initWithData：data 
 encoding：NSUTF8StringEncoding]; 
} else {
 //获取失败
输出= [错误描述]; 
} 
} 
}]; 
} 
  
 
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.
 解决方案 
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];
                  }
              }
          }];
}
                        
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