以与Facebook oauth密钥类似的方式获取Twitter oauth密钥

Question

我有一个iPhone应用程序,当前使用facebook图形api oauth url(https://graph.facebook.com/oauth/authorize？...)加载UIWebView - 用户然后输入他们的登录详细信息,并提交我从URL中检索访问令牌.(以这种方式我相信http://www.capturetheconversation.com/technology/iphone-facebook-oauth2-graph-api)然后将其传递给我的java服务器,它使用RestFB执行各种操作

我的问题是,有没有类似的方式与Twitter这样做？目前似乎获取数据的唯一方法是下载库并使用它; 然而,这是一种我不愿意使用的方法,因为它会占用不必要的空间,因为所有命令实际上都是从我的Java服务器运行的.

任何建议将不胜感激

谢谢,

担

Answer 1

Twitter使用OAuth 1.0a 身份验证,但不使用OAuth 2.0.

在Twitter上获取访问令牌的步骤:

1. 在Twitter上创建自己的应用程序,获取消费者密钥和秘密.
2. 在我的案例中下载开源OAuth库,OAuthConsumer.
3. 写注册码,见下面的例子.

ps将应用程序类型设置为Web应用程序,它将打开回调而不是PIN代码.

static NSString* kMyApplicationConsumerKey = @"XXXXXXXXXXX";
static NSString* kMyApplicationConsumerSecret = @"XXXXXXXXXXX";


@interface TwitterConnector : NSObject {
    OAConsumer* consumer;
    OAToken* requestToken;
    OAToken* accessToken;
}

- (void)start;

@end

@implementation TwitterConnector

- (void)start {
    consumer = [[OAConsumer alloc] initWithKey:kMyApplicationConsumerKey secret:kMyApplicationConsumerSecret];

    NSURL* requestTokenUrl = [NSURL URLWithString:@"http://api.twitter.com/oauth/request_token"];
    OAMutableURLRequest* requestTokenRequest = [[[OAMutableURLRequest alloc] initWithURL:requestTokenUrl
                                                                                consumer:consumer 
                                                                                   token:nil
                                                                                   realm:nil
                                                                       signatureProvider:nil] autorelease];
    OARequestParameter* callbackParam = [[[OARequestParameter alloc] initWithName:@"oauth_callback" value:@"twitter://authorized"] autorelease];
    [requestTokenRequest setHTTPMethod:@"POST"];
    [requestTokenRequest setParameters:[NSArray arrayWithObject:callbackParam]];
    OADataFetcher* dataFetcher = [[[OADataFetcher alloc] init] autorelease];
    [dataFetcher fetchDataWithRequest:requestTokenRequest
                             delegate:self 
                    didFinishSelector:@selector(didReceiveRequestToken:data:)
                      didFailSelector:@selector(didFailOAuth:error:)];
}

- (void)didReceiveRequestToken:(OAServiceTicket*)ticket data:(NSData*)data {
    NSString* httpBody = [[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding] autorelease];
    requestToken = [[OAToken alloc] initWithHTTPResponseBody:httpBody];

    NSURL* authorizeUrl = [NSURL URLWithString:@"https://api.twitter.com/oauth/authorize"];
    OAMutableURLRequest* authorizeRequest = [[[OAMutableURLRequest alloc] initWithURL:authorizeUrl
                                                                             consumer:nil 
                                                                                token:nil
                                                                                realm:nil
                                                                    signatureProvider:nil] autorelease];
    NSString* oauthToken = requestToken.key;
    OARequestParameter* oauthTokenParam = [[[OARequestParameter alloc] initWithName:@"oauth_token" value:oauthToken] autorelease];
    [authorizeRequest setParameters:[NSArray arrayWithObject:oauthTokenParam]];

    UIWebView* webView = [[UIWebView alloc] initWithFrame:[UIScreen mainScreen].bounds];
    [[[UIApplication sharedApplication] keyWindow] addSubview:webView];
    [webView release];

    webView.delegate = self;
    [webView loadRequest:authorizeRequest];
}

- (void)didReceiveAccessToken:(OAServiceTicket*)ticket data:(NSData*)data {
    NSString* httpBody = [[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding] autorelease];
    accessToken = [[OAToken alloc] initWithHTTPResponseBody:httpBody];

    // FINISHED!
}

- (void)didFailOAuth:(OAServiceTicket*)ticket error:(NSError*)error {
    // ERROR!
}

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
#pragma mark UIWebViewDelegate

- (BOOL)webView:(UIWebView*)webView shouldStartLoadWithRequest:(NSURLRequest*)request navigationType:(UIWebViewNavigationType)navigationType {
    if ([[[request URL] scheme] isEqualToString:@"twitter"]) {

        // Extract oauth_verifier from URL query
        NSString* verifier = nil;       
        NSArray* urlParams = [[[request URL] query] componentsSeparatedByString:@"&"];
        for (NSString* param in urlParams) {
            NSArray* keyValue = [param componentsSeparatedByString:@"="];
            NSString* key = [keyValue objectAtIndex:0];
            if ([key isEqualToString:@"oauth_verifier"]) {
                verifier = [keyValue objectAtIndex:1];
                break;
            }
        }

        if (verifier) {
            NSURL* accessTokenUrl = [NSURL URLWithString:@"https://api.twitter.com/oauth/access_token"];
            OAMutableURLRequest* accessTokenRequest = [[[OAMutableURLRequest alloc] initWithURL:accessTokenUrl
                                                                                       consumer:consumer 
                                                                                          token:requestToken
                                                                                          realm:nil
                                                                              signatureProvider:nil] autorelease];
            OARequestParameter* verifierParam = [[[OARequestParameter alloc] initWithName:@"oauth_verifier" value:verifier] autorelease];
            [accessTokenRequest setHTTPMethod:@"POST"];
            [accessTokenRequest setParameters:[NSArray arrayWithObject:verifierParam]];
            OADataFetcher* dataFetcher = [[[OADataFetcher alloc] init] autorelease];
            [dataFetcher fetchDataWithRequest:accessTokenRequest
                                     delegate:self 
                            didFinishSelector:@selector(didReceiveAccessToken:data:)
                              didFailSelector:@selector(didFailOAuth:error:)];
        } else {
            // ERROR!
        }

        [webView removeFromSuperview];

        return NO;
    }
    return YES;
}

- (void)webView:(UIWebView*)webView didFailLoadWithError:(NSError*)error {
    // ERROR!
}

@end