Download as PDF, PPTX
![- (void)downloadData: (NSString *)urlString
{
NSURL *url = [NSURL URLWithString: urlString];
NSMutableURLRequest *urlRequest = [NSMutableURLRequest requestWithURL: url];
NSLog( @"urlString = %@", urlString );
self.receivedData = [NSMutableData data];
NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest: urlRequest
delegate: self];
if ( connection == nil )
{
NSLog( @"ERROR: NSURLConnection is nil" );
}
}
- (void)connection:(NSURLConnection *)connection
didReceiveData:(NSData *)data
{
NSLog( @"Calling: connection:didReceiveData:" );
[self.receivedData appendData: data];
}
基本3メソッド
- (void)connection:(NSURLConnection *)connection
didFailWithError:(NSError *)error
{
NSLog( @"Calling: connection:didFailWithError: %@", error );
self.receivedData = nil;
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSLog( @"Calling: connectionDidFinishLoading:" );
[connection release];
NSLog( @"receivedData = %@", [[[NSString alloc] initWithData: self.receivedData
encoding: NSUTF8StringEncoding] autorelease] );
self.receivedData = nil;
}
9](https://image.slidesharecdn.com/cocoastudy-47-nsconn-140222102827-phpapp02/85/Cocoa-47-NSURLConnection-9-320.jpg)
![- (void)
connection:(NSURLConnection *)connection
didReceiveResponse:(NSURLResponse *)response
{
NSHTTPURLResponse *httpRes = (NSHTTPURLResponse *)response;
NSLog( @"Calling: connection:didReceiveResponse: status code=%d", [httpRes statusCode] );
}
- (void)
connection:(NSURLConnection *)connection
didCancelAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge
{
NSLog( @"Calling: connection:didCancelAuthenticationChallenge: %@", challenge );
}
- (void)
connection:(NSURLConnection *)connection
didSendBodyData:(NSInteger)bytesWritten
totalBytesWritten:(NSInteger)totalBytesWritten
totalBytesExpectedToWrite:(NSInteger)totalBytesExpectedToWrite
{
NSLog( @"Calling: connection:didSendBodyData:totalBytesWritten:totalBytesExpectedToWrite:" );
}
- (NSURLRequest *)connection:(NSURLConnection *)connection
willSendRequest:(NSURLRequest *)request
redirectResponse:(NSURLResponse *)redirectResponse
{
NSLog( @"Calling: connection:willSendRequest:redirectResponse: %@", redirectResponse );
return request;
}
- (BOOL)connectionShouldUseCredentialStorage:(NSURLConnection *)connection
{
NSLog( @"Calling: connectionShouldUseCredentialStorage:" );
return NO;
}
10](https://image.slidesharecdn.com/cocoastudy-47-nsconn-140222102827-phpapp02/85/Cocoa-47-NSURLConnection-10-320.jpg)
![- (BOOL)
connection:(NSURLConnection *)connection
canAuthenticateAgainstProtectionSpace:(NSURLProtectionSpace *)protectionSpace
{
NSString *authMethod = [protectionSpace authenticationMethod];
NSLog( @"Calling: connection:canAuthenticateAgainstProtectionSpace: "
" auth method=%@/host=%@", authMethod, [protectionSpace host] );
if ( [authMethod isEqualToString: NSURLAuthenticationMethodServerTrust] )
secTrustRef = [protectionSpace serverTrust];
if (secTrustRef != NULL)
{
SecTrustResultType result;
OSErr er = SecTrustEvaluate( secTrustRef, &result );
if ( er != noErr) {
return NO;
}
if ( result == kSecTrustResultRecoverableTrustFailure ) {
NSLog( @"---SecTrustResultRecoverableTrustFailure" );
}
NSLog( @"---Return YES" );
return YES;
}
}
if ( [authMethod isEqualToString: NSURLAuthenticationMethodDefault] ) {
NSLog( @"---Return YES" );
return YES;
}
return NO;
{
}
Security.frameworkも参照しておく必要がある
22](https://image.slidesharecdn.com/cocoastudy-47-nsconn-140222102827-phpapp02/85/Cocoa-47-NSURLConnection-22-320.jpg)
![正しい証明書のサイト(2)
- (void)
connection:(NSURLConnection *)connection
didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge
{
NSLog( @"Calling: connection:didReceiveAuthenticationChallenge: %@", challenge );
NSURLCredential *credential = [NSURLCredential credentialForTrust: secTrustRef];
[[challenge sender] useCredential: credential forAuthenticationChallenge:challenge];
}
認証関連メソッドに対応することで接続できる
確認できない証明書にも対応
urlString = https://msyk.net/
Calling: connection:willSendRequest:redirectResponse: (null)
Calling: connectionShouldUseCredentialStorage:
Calling: connection:canAuthenticateAgainstProtectionSpace: auth method=NSURLAuthenticationMe
---Return YES
Calling: connection:didReceiveAuthenticationChallenge: <NSURLAuthenticationChallenge: 0x4d0818
Calling: connection:didReceiveResponse: status code=200
Calling: connection:didReceiveData:
Calling: connectionDidFinishLoading:
receivedData = <html lang="ja">
23](https://image.slidesharecdn.com/cocoastudy-47-nsconn-140222102827-phpapp02/85/Cocoa-47-NSURLConnection-23-320.jpg)
![- (void)
connection:(NSURLConnection *)connection
didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge
{
NSLog( @"Calling: connection:didReceiveAuthenticationChallenge: %@", challenge );
if ( [challenge previousFailureCount] == 0 )
{
NSURLCredential *credential
= [NSURLCredential credentialWithUser: @"te"
password: @"te"
persistence: NSURLCredentialPersistenceNone];
[[challenge sender] useCredential: credential
forAuthenticationChallenge:challenge];
} else if ( [challenge previousFailureCount] == 1 )
{
NSURLCredential *credential
= [NSURLCredential credentialWithUser: @"msyk"
password: @"12345678"
persistence: NSURLCredentialPersistenceNone];
[[challenge sender] useCredential: credential
forAuthenticationChallenge:challenge];
} else {
[[challenge sender] cancelAuthenticationChallenge: challenge];
}
}
26](https://image.slidesharecdn.com/cocoastudy-47-nsconn-140222102827-phpapp02/85/Cocoa-47-NSURLConnection-26-320.jpg)
Uploaded byMasayuki Nii
Cocoa勉強会#47-NSURLConnectionのデリゲートメソッドと認証
NSURLConnectionのデリゲートメソッドと認証 This document discusses NSURLConnection delegate methods and authentication. It describes the order that delegate methods are called for different connection states, including before, during and after communication. It also covers all delegate methods, including those related to authentication and handling different error conditions. Code examples are provided to demonstrate how to implement delegate methods to handle normal connections as well as errors, redirects, SSL connections and authentication.
Cocoa勉強会#47-NSURLConnectionのデリゲートメソッドと認証
- 1.
- 2.
- 3.
- 4. NSURLConnectionの最低限の使用法 NSURLRequest等からインスタンス化 受信を始めると、以下のメドッドが呼び出される • - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData*)data 受信が完了すると、以下のメソッドが呼び出される • - (void)connectionDidFinishLoading:(NSURLConnection *)connection いちおうエラー処理くらいしよう • - (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error 4
- 5.
- 6. すべてのデリゲートメソッド(1) 通信前 • - (NSURLRequest *)connection:(NSURLConnection *)connectionwillSendRequest:(NSURLRequest *)request redirectResponse:(NSURLResponse *)redirectResponse 通信中 • • - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data - (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response 6
- 7. すべてのデリゲートメソッド(2) 通信後 • • • - (void)connectionDidFinishLoading:(NSURLConnection *)connection - (void)connection:(NSURLConnection*)connection didFailWithError:(NSError *)error - (void)connection:(NSURLConnection *)connection didSendBodyData:(NSInteger)bytesWritten totalBytesWritten:(NSInteger)totalBytesWritten totalBytesExpectedToWrite: (NSInteger)totalBytesExpectedToWrite 7
- 8. すべてのデリゲートメソッド(3) 認証 • • • • - (BOOL)connectionShouldUseCredentialStorage: (NSURLConnection *)connection -(BOOL)connection:(NSURLConnection *)connection canAuthenticateAgainstProtectionSpace: (NSURLProtectionSpace *)protectionSpace - (void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge: (NSURLAuthenticationChallenge *)challenge - (void)connection:(NSURLConnection *)connection didCancelAuthenticationChallenge: (NSURLAuthenticationChallenge *)challenge 8
- 9. - (void)downloadData: (NSString*)urlString { NSURL *url = [NSURL URLWithString: urlString]; NSMutableURLRequest *urlRequest = [NSMutableURLRequest requestWithURL: url]; NSLog( @"urlString = %@", urlString ); self.receivedData = [NSMutableData data]; NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest: urlRequest delegate: self]; if ( connection == nil ) { NSLog( @"ERROR: NSURLConnection is nil" ); } } - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data { NSLog( @"Calling: connection:didReceiveData:" ); [self.receivedData appendData: data]; } 基本3メソッド - (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error { NSLog( @"Calling: connection:didFailWithError: %@", error ); self.receivedData = nil; } - (void)connectionDidFinishLoading:(NSURLConnection *)connection { NSLog( @"Calling: connectionDidFinishLoading:" ); [connection release]; NSLog( @"receivedData = %@", [[[NSString alloc] initWithData: self.receivedData encoding: NSUTF8StringEncoding] autorelease] ); self.receivedData = nil; } 9
- 10. - (void) connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse*)response { NSHTTPURLResponse *httpRes = (NSHTTPURLResponse *)response; NSLog( @"Calling: connection:didReceiveResponse: status code=%d", [httpRes statusCode] ); } - (void) connection:(NSURLConnection *)connection didCancelAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge { NSLog( @"Calling: connection:didCancelAuthenticationChallenge: %@", challenge ); } - (void) connection:(NSURLConnection *)connection didSendBodyData:(NSInteger)bytesWritten totalBytesWritten:(NSInteger)totalBytesWritten totalBytesExpectedToWrite:(NSInteger)totalBytesExpectedToWrite { NSLog( @"Calling: connection:didSendBodyData:totalBytesWritten:totalBytesExpectedToWrite:" ); } - (NSURLRequest *)connection:(NSURLConnection *)connection willSendRequest:(NSURLRequest *)request redirectResponse:(NSURLResponse *)redirectResponse { NSLog( @"Calling: connection:willSendRequest:redirectResponse: %@", redirectResponse ); return request; } - (BOOL)connectionShouldUseCredentialStorage:(NSURLConnection *)connection { NSLog( @"Calling: connectionShouldUseCredentialStorage:" ); return NO; } 10
- 11.
- 12. 普通にうまくいった場合 didReceiveResponseが先に呼ばれる urlString = http://msyk.dyndns.org/test.php Calling:connection:willSendRequest:redirectResponse: (null) Calling: connectionShouldUseCredentialStorage: Calling: connection:didReceiveResponse: status code=200 Calling: connection:didReceiveData: : Calling: connection:didReceiveData: Calling: connectionDidFinishLoading: receivedData = 012345678901234567890… 12
- 13. 存在しないファイルにアクセスした場合 didFailWithError:は呼ばれない didReceiveResponse:でのステータスコードのチェッ クが必要 urlString = http://msyk.dyndns.org/test1.php Calling:connection:willSendRequest:redirectResponse: (null) Calling: connectionShouldUseCredentialStorage: Calling: connection:didReceiveResponse: status code=404 Calling: connection:didReceiveData: Calling: connectionDidFinishLoading: receivedData = <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"> <html><head> <title>404 Not Found</title> 13
- 14. 存在しないURLに接続しようとした didFailWithError:が呼び出される エラーは「サーバが見つからない」 urlString = http://msyk1234.dyndns.org/ Calling:connection:willSendRequest:redirectResponse: (null) Calling: connectionShouldUseCredentialStorage: Calling: connection:didFailWithError: Error Domain=NSURLErrorDomain Code=-1003 "A server with the specified hostname could not be found." UserInfo=0x7013250 {NSErrorFailingURLStringKey=http:// msyk1234.dyndns.org/, NSErrorFailingURLKey=http:// msyk1234.dyndns.org/, NSLocalizedDescription=A server with the specified hostname could not be found., NSUnderlyingError=0x7013190 "A server with the specified hostname could not be found."} 14
- 15. DNSの応答がない場合 didFailWithError:が呼び出される エラーは「タイムアウト」 urlString = http://msyk.dyndns.org/ Calling:connection:willSendRequest:redirectResponse: (null) Calling: connectionShouldUseCredentialStorage: Calling: connection:didFailWithError: Error Domain=NSURLErrorDomain Code=-1001 "The request timed out." UserInfo=0x8b14b50 {NSErrorFailingURLStringKey=http://msyk.dyndns.org/, NSErrorFailingURLKey=http://msyk.dyndns.org/, NSLocalizedDescription=The request timed out., NSUnderlyingError=0x8b132d0 "The request timed out."} 15
- 16. 到達しないIPアドレスを指定した場合 didFailWithError:が呼び出される エラーは「タイムアウト」 urlString = http://192.168.1.98/ Calling:connection:willSendRequest:redirectResponse: (null) Calling: connectionShouldUseCredentialStorage: Calling: connection:didFailWithError: Error Domain=NSURLErrorDomain Code=-1001 "The request timed out." UserInfo=0x4b25350 {NSErrorFailingURLStringKey=http:// 192.168.1.98/, NSErrorFailingURLKey=http://192.168.1.98/, NSLocalizedDescription=The request timed out., NSUnderlyingError=0x4b22330 "The request timed out."} 16
- 17. すべてのネットワーク接続がオフ(1) didFailWithError:が呼び出される エラーは「インターネットがオフライン」 urlString = http://msyk.dyndns.org/ Calling:connection:willSendRequest:redirectResponse: (null) Calling: connectionShouldUseCredentialStorage: Calling: connection:didFailWithError: Error Domain=NSURLErrorDomain Code=-1009 "The Internet connection appears to be offline." UserInfo=0x4b34070 {NSErrorFailingURLStringKey=http://msyk.dyndns.org/, NSErrorFailingURLKey=http://msyk.dyndns.org/, NSLocalizedDescription=The Internet connection appears to be offline., NSUnderlyingError=0x4b0dbe0 "The Internet connection appears to be offline."} 17
- 18. すべてのネットワーク接続がオフ(2) URLにIPアドレスを指定した場合 didFailWithError:が呼び出される エラーは「サーバに接続できない」 urlString = http://10.0.1.1/ Calling:connection:willSendRequest:redirectResponse: (null) Calling: connectionShouldUseCredentialStorage: Calling: connection:didFailWithError: Error Domain=NSURLErrorDomain Code=-1004 "Could not connect to the server." UserInfo=0x4e2fa70 {NSErrorFailingURLStringKey=http://10.0.1.1/, NSErrorFailingURLKey=http:// 10.0.1.1/, NSLocalizedDescription=Could not connect to the server., NSUnderlyingError=0x4e0c4c0 "Could not connect to the server."} 18
- 19. リダイレクト 基本3メソッドだけの場合、何もしなくてもOK willSendRequest:redirectResponse:の呼び出し2回 urlString = http://msyk.dyndns.org/test.php Calling:connection:willSendRequest:redirectResponse: (null) Calling: connectionShouldUseCredentialStorage: Calling: connection:willSendRequest:redirectResponse: <NSHTTPURLResponse: 0x6834f60> Calling: connection:didReceiveResponse: status code=200 Calling: connection:didReceiveData: : Calling: connection:didReceiveData: Calling: connectionDidFinishLoading: receivedData = <html lang="ja"> <head> 19
- 20.
- 21. 正しい証明書のサイト(1) 基本3メソッドだけの場合、何もしなくても接続可能 認証関連のメソッドを単に組み込んだだけの場合だと、 以下のように通信は正しくできない urlString = https://msyk.net/ Calling:connection:willSendRequest:redirectResponse: (null) Calling: connectionShouldUseCredentialStorage: Calling: connection:canAuthenticateAgainstProtectionSpace: <NSURLProtectionSpace: 0x6502 Calling: connection:didReceiveAuthenticationChallenge: <NSURLAuthenticationChallenge: 0x ＊＊＊＊何も受信できていない 21
- 22. - (BOOL) connection:(NSURLConnection *)connection canAuthenticateAgainstProtectionSpace:(NSURLProtectionSpace*)protectionSpace { NSString *authMethod = [protectionSpace authenticationMethod]; NSLog( @"Calling: connection:canAuthenticateAgainstProtectionSpace: " " auth method=%@/host=%@", authMethod, [protectionSpace host] ); if ( [authMethod isEqualToString: NSURLAuthenticationMethodServerTrust] ) secTrustRef = [protectionSpace serverTrust]; if (secTrustRef != NULL) { SecTrustResultType result; OSErr er = SecTrustEvaluate( secTrustRef, &result ); if ( er != noErr) { return NO; } if ( result == kSecTrustResultRecoverableTrustFailure ) { NSLog( @"---SecTrustResultRecoverableTrustFailure" ); } NSLog( @"---Return YES" ); return YES; } } if ( [authMethod isEqualToString: NSURLAuthenticationMethodDefault] ) { NSLog( @"---Return YES" ); return YES; } return NO; { } Security.frameworkも参照しておく必要がある 22
- 23. 正しい証明書のサイト(2) - (void) connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge*)challenge { NSLog( @"Calling: connection:didReceiveAuthenticationChallenge: %@", challenge ); NSURLCredential *credential = [NSURLCredential credentialForTrust: secTrustRef]; [[challenge sender] useCredential: credential forAuthenticationChallenge:challenge]; } 認証関連メソッドに対応することで接続できる 確認できない証明書にも対応 urlString = https://msyk.net/ Calling: connection:willSendRequest:redirectResponse: (null) Calling: connectionShouldUseCredentialStorage: Calling: connection:canAuthenticateAgainstProtectionSpace: auth method=NSURLAuthenticationMe ---Return YES Calling: connection:didReceiveAuthenticationChallenge: <NSURLAuthenticationChallenge: 0x4d0818 Calling: connection:didReceiveResponse: status code=200 Calling: connection:didReceiveData: Calling: connectionDidFinishLoading: receivedData = <html lang="ja"> 23
- 24. 確認できない証明書（エラーにする場合） SecTrustEvaluate関数の戻り値 • kSecTrustResultRecoverableTrustFailureの場合にNOを返す 基本3メソッドではこれと同じ状態 urlString = https://coolnotify.com/ Calling:connection:willSendRequest:redirectResponse: (null) Calling: connectionShouldUseCredentialStorage: Calling: connection:canAuthenticateAgainstProtectionSpace: auth method=NSURLAuthenticationMethodServerTrust/host=coolnotify.com Calling: connection:didFailWithError: Error Domain=NSURLErrorDomain Code=-1202 "The certificate for this server is invalid.You might be connecting to a server that is pretending to be “coolnotify.com” which could put your confidential information at risk." UserInfo=0x4b232e0 {NSErrorFailingURLStringKey=https://coolnotify.com/, NSLocalizedRecoverySuggestion=Would you like to connect to the server anyway?, NSErrorFailingURLKey=https://coolnotify.com/, NSLocalizedDescription=The certificate for this server is invalid.You might be connecting to a server that is pretending to be “coolnotify.com” which could put your confidential information at risk., NSUnderlyingError=0x4b22c10 "The certificate for this server is invalid.You might be connecting to a server that is pretending to be “coolnotify.com” which could put your confidential information at risk.", NSURLErrorFailingURLPeerTrustErrorKey=<SecTrustRef: 24
- 25.
- 26. - (void) connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge*)challenge { NSLog( @"Calling: connection:didReceiveAuthenticationChallenge: %@", challenge ); if ( [challenge previousFailureCount] == 0 ) { NSURLCredential *credential = [NSURLCredential credentialWithUser: @"te" password: @"te" persistence: NSURLCredentialPersistenceNone]; [[challenge sender] useCredential: credential forAuthenticationChallenge:challenge]; } else if ( [challenge previousFailureCount] == 1 ) { NSURLCredential *credential = [NSURLCredential credentialWithUser: @"msyk" password: @"12345678" persistence: NSURLCredentialPersistenceNone]; [[challenge sender] useCredential: credential forAuthenticationChallenge:challenge]; } else { [[challenge sender] cancelAuthenticationChallenge: challenge]; } } 26
- 27. 認証に失敗する場合 urlString = https://msyk.net/iphone/ Calling:connection:willSendRequest:redirectResponse: (null) Calling: connectionShouldUseCredentialStorage: Calling: connection:canAuthenticateAgainstProtectionSpace: auth method=NSURLAuthenticationMethodServerTrust/host=msyk.net ---Return YES Calling: connection:didReceiveAuthenticationChallenge: <NSURLAuthenticationChallenge: 0x4b25fd0 Calling: connection:canAuthenticateAgainstProtectionSpace: auth method=NSURLAuthenticationMethodDefault/host=msyk.net ---Return YES Calling: connection:didReceiveAuthenticationChallenge: <NSURLAuthenticationChallenge: 0x4b2413 Calling: connection:canAuthenticateAgainstProtectionSpace: auth method=NSURLAuthenticationMethodDefault/host=msyk.net ---Return YES Calling: connection:didReceiveAuthenticationChallenge: <NSURLAuthenticationChallenge: 0x9b00b2 Calling: connection:didFailWithError: Error Domain=NSURLErrorDomain Code=-1012 "The operat couldn’t be completed. (NSURLErrorDomain error -1012.)" UserInfo=0x890d7e0 {NSErrorFailingURLKey=https://msyk.net/iphone/, NSErrorFailingURLStringKey=https://msyk.net/ iphone/} 27
- 28. 認証に1度失敗し、2度目に成功する場合 urlString = https://msyk.net/iphone/ Calling:connection:willSendRequest:redirectResponse: (null) Calling: connectionShouldUseCredentialStorage: Calling: connection:canAuthenticateAgainstProtectionSpace: auth method=NSURLAuthenticationMethodServerTrust/host=msyk.net ---Return YES Calling: connection:didReceiveAuthenticationChallenge: <NSURLAuthenticationChallenge: 0x9a030e0 Calling: connection:canAuthenticateAgainstProtectionSpace: auth method=NSURLAuthenticationMethodDefault/host=msyk.net ---Return YES Calling: connection:didReceiveAuthenticationChallenge: <NSURLAuthenticationChallenge: 0x700ae90 Calling: connection:canAuthenticateAgainstProtectionSpace: auth method=NSURLAuthenticationMethodDefault/host=msyk.net ---Return YES Calling: connection:didReceiveAuthenticationChallenge: <NSURLAuthenticationChallenge: 0x4e0a6f0 Calling: connection:didReceiveResponse: status code=200 Calling: connection:didReceiveData: Calling: connectionDidFinishLoading: receivedData = <?xml version="1.0" encoding="UTF-8"?>… 28
- 29.
- 30.