在 iPhone 上的 Objective C 中使用 OAuth 将照片上传到 TwitPic 时遇到问题

Question

我一直在开发一款 iPhone 应用程序，该应用程序具有将照片上传到 TwitPic 的功能。我让它与基本身份验证一起使用。

我正在尝试让它与 OAuth 一起使用。我收到身份验证错误。我已经非常仔细地研究了 TwitPic 文档。

我通过显示 UI Web 视图来授权应用程序，它返回一个 PIN 值。我在应用程序中输入 PIN 值并请求令牌。

我可以将状态更新上传到 Twitter，但不能上传照片。

我的代码基于此处的一些示例代码：

Example iPhone app using OAuth

这是我的代码：

NSString *url = @"http://api.twitpic.com/2/upload.json";
NSString *oauth_header = [oAuth oAuthHeaderForMethod:@"POST" andUrl:url andParams:nil];

NSLog(@"OAuth header : %@\n\n", oauth_header);

ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:[NSURL URLWithString:url]];
[request addRequestHeader:@"User-Agent" value:@"ASIHTTPRequest"];
request.requestMethod = @"POST";

[request addRequestHeader:@"X-Auth-Service-Provider" value:@"https://api.twitter.com/1/account/verify_credentials.json"];   

[request addRequestHeader:@"X-Verify-Credentials-Authorization" value:oauth_header];    

NSData *imageRepresentation = UIImageJPEGRepresentation(imageToUpload, 0.8);        
[request setData:imageRepresentation forKey:@"media"];
[request setPostValue:@"Some Message"  forKey:@"message"];  
[request setPostValue:TWITPIC_API_KEY  forKey:@"key"];  

[request setDelegate:self];
[request setDidFinishSelector:@selector(requestDone:)];
[request setDidFailSelector:@selector(requestFailed:)];

[request start];    

这是 OAuth 标头：

OAuth realm="http://api.twitter.com/", oauth_timestamp="1275492425", oauth_nonce="b686f20a18ba6763ac52b689b2ac0c421a9e4013", oauth_signature_method="HMAC-SHA1", oauth_consumer_key="zNbW3Xi3MuS7i9cpz6fw", oauth_version="1.0", oauth_token="147275699-jmrjpwk3B6mO2FX2BCc9Ci9CRBbBKYW1bOni2MYs", oauth_signature="d17HImz6VgygZgbcp845CD2qNnI%3D"

Answer 1

哈！我找到了！ 我们应该使用https://api.twitter.com/1/account/verify_credentials.json 创建header 并发布到http://api.twitpic.com/2/upload.json！ （并使用 GET）

    NSString *fakeurl = @"https://api.twitter.com/1/account/verify_credentials.json";
NSString *oauth_header = [oAuth oAuthHeaderForMethod:@"GET" andUrl:fakeurl andParams:nil];

NSLog(@"OAuth header : %@\n\n", oauth_header);

NSString *url = @"http://api.twitpic.com/2/upload.json";
ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:[NSURL URLWithString:url]];
request.delegate = self;
[request addRequestHeader:@"User-Agent" value:@"ASIHTTPRequest"];
request.requestMethod = @"GET";

[request addRequestHeader:@"X-Verify-Credentials-Authorization" value:oauth_header];    
[request addRequestHeader:@"X-Auth-Service-Provider" value:@"https://api.twitter.com/1/account/verify_credentials.json"];   


NSData *imageRepresentation = UIImageJPEGRepresentation([UIImage imageNamed:@"IMG_0717.jpg"], 0.2);    
if (imageRepresentation) {
    NSLog(@"Pic not nil");
}
[request setData:imageRepresentation forKey:@"media"];
[request setPostValue:@"twitpic, i hate you. die painfully."  forKey:@"message"];  
[request setPostValue:twitPicKey  forKey:@"key"];  

[request setDelegate:self];
[request setDidFinishSelector:@selector(requestDone:)];
[request setDidFailSelector:@selector(requestFailed:)];

[request start];

Answer 2

使用 GSTwitPicEngine：https://github.com/Gurpartap/GSTwitPicEngine

使用 GSTwitPicEngine：

使用类或根据需要初始化引擎：

self.twitpicEngine = (GSTwitPicEngine *)[GSTwitPicEngine twitpicEngineWithDelegate:self];

找到授权令牌并提供给 twitpicEngine：

[twitpicEngine setAccessToken:token];

然后上传图片并附上一条短信（不发布到推特）：

[twitpicEngine uploadPicture:[UIImage imageNamed:@"mypic.png"]  withMessage:@"Hello world!"]; // This message is supplied back in success delegate call in request's userInfo.

只上传图片：

[twitpicEngine uploadPicture:uploadImageView.image];

在请求结束时，使用适当的数据和信息调用其中一个委托方法。

---

GSTwitPicEngineDelegate 协议规定了两种委托方法：

- (void)twitpicDidFinishUpload:(NSDictionary *)response {
  NSLog(@"TwitPic finished uploading: %@", response);

  // [response objectForKey:@"parsedResponse"] gives an NSDictionary of the response one of the parsing libraries was available.
  // Otherwise, use [[response objectForKey:@"request"] objectForKey:@"responseString"] to parse yourself.

  if ([[[response objectForKey:@"request"] userInfo] objectForKey:@"message"] > 0 && [[response objectForKey:@"parsedResponse"] count] > 0) {
    // Uncomment to update status upon successful upload, using MGTwitterEngine's instance.
    // [twitterEngine sendUpdate:[NSString stringWithFormat:@"%@ %@", [[[response objectForKey:@"request"] userInfo] objectForKey:@"message"], [[response objectForKey:@"parsedResponse"] objectForKey:@"url"]]];
  }
}

和

- (void)twitpicDidFailUpload:(NSDictionary *)error {
  NSLog(@"TwitPic failed to upload: %@", error);

  if ([[error objectForKey:@"request"] responseStatusCode] == 401) {
    // UIAlertViewQuick(@"Authentication failed", [error objectForKey:@"errorDescription"], @"OK");
  }
}

---

一切准备就绪？

Answer 3

生成标头的 OAuth 方法必须是 GET。不是 POST。

网址也必须是https://api.twitter.com/1/account/verify_credentials.json

Answer 4

谢谢，这也帮助我让它工作了 :) 我还用工作示例代码更新了 http://github.com/jaanus/PlainOAuth。