新浪微博项目技术之一OAuth新浪授权

#import "OAuthViewController.h"
#import "AFNetworking.h"

@interface OAuthViewController ()<UIWebViewDelegate>

@end

@implementation OAuthViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    /*
     
       通过webview进行OAuth新浪授权请求
     
    */
    
    //1.创建一个webview
    UIWebView *webView = [[UIWebView alloc] init];
    webView.frame = self.view.bounds;
    webView.delegate = self;
    [self.view addSubview:webView];
    
    //2.用webView加载登陆页面(新浪提供的)
    /* 请求参数：
     client_id    true    string    申请应用时分配的AppKey。
     redirect_uri    true    string    授权回调地址，站外应用需与设置的回调地址一致，站内应用需填写canvas page的地址。
    */

    NSURL *url = [NSURL URLWithString:@"https://api.weibo.com/oauth2/authorize?client_id=3125184858&redirect_uri=http://www.baidu.com"];
    NSURLRequest *request = [NSURLRequest requestWithURL:url];
    [webView loadRequest:request];

    
}

#pragma mark ---webView代理方法  用于验证请求是否发出
-(void)webViewDidFinishLoad:(UIWebView *)webView
{
    NSLog(@"---webViewDidFinishLoad");

}
-(void)webViewDidStartLoad:(UIWebView *)webView
{

    NSLog(@"webViewDidStartLoad");
}

//开始网络请求
-(BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
    //1.获得url
    NSString *url = request.URL.absoluteString;
    //2.判断是否为回调地址   截取code的参数值
    NSRange range = [url rangeOfString:@"code="];
    if (range.length != 0) {
        //用于获得请求参数后面的code   位置加上当前位置可以获得所需参数首位的地址
        int fromIndex = range.location + range.length;
        NSString *code = [url substringFromIndex:fromIndex];
        
        //利用code 换取一个accessToKen
        [self accessToKenWithCode:code];
        
        //禁止加载回调地址
        return NO;
    }

    return  YES;

}

/*
 利用code（授权成功后的request token）换取一个accessToken
 
@param code 授权成功后的request token
 
 */


-(void)accessToKenWithCode:(NSString *)code
{
/*
 URL：https://api.weibo.com/oauth2/access_token
 
 请求参数：
 client_id：申请应用时分配的AppKey
 client_secret：申请应用时分配的AppSecret
 grant_type：使用authorization_code
 redirect_uri：授权成功后的回调地址
 code：授权成功后返回的code
 */
    
    
    
   //1.请求管理者
    AFHTTPRequestOperationManager *mgr = [AFHTTPRequestOperationManager manager];
    mgr.responseSerializer = [AFJSONResponseSerializer serializer];
    
    //2.拼接请求参数
    NSMutableDictionary *params = [NSMutableDictionary dictionary];
    params[@"client_id"] = @"3125184858";
    params[@"client_secret"] = @"5fbe16f31ea2c34f3f0be9a6185cdd04";
    params[@"grant_type"] = @"authorization_code";
    //默认请求成功后的回调地址
    params[@"redirect_uri"] = @"http://www.baidu.com";
    params[@"code"] = code;


    //3.发送请求
    [mgr POST:@"https://api.weibo.com/oauth2/access_token" parameters:params success:^(AFHTTPRequestOperation *operation, NSDictionary *responseObject) {
        NSLog(@"请求成功 -- %@",responseObject);
        
        //沙盒路径
        NSString *doc  = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)lastObject];
        NSString *path = [doc stringByAppendingPathComponent:@"/account.plist"];
        
        //将返回的账号数据 存进沙盒
        [responseObject writeToFile:path atomically:YES];
        
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"请求失败--%@",error);
        
    }];

}





@end