ImageClient8-proxyAuth/CFNetworkLoader.h

/*
 
File: CFNetworkLoader.h
 
Abstract: CFNetwork ImageClient Sample
 
Version: 1.0
 
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*/ 
 
#import <Cocoa/Cocoa.h>
#import <SystemConfiguration/SystemConfiguration.h>
 
@class ImageClient;
 
@interface CFNetworkLoader : NSObject {
    ImageClient *imageClient;
    CFHTTPMessageRef request;
    CFReadStreamRef readStream;
    CFMutableDataRef data;
    
    // The current proxy settings
    CFDictionaryRef proxyDictionary;
    
    // The dynamic store we're using to monitor system proxy changes
    SCDynamicStoreRef systemDynamicStore;
 
    BOOL haveExaminedHeaders;    // Whether we've seen the headers of the response yet
    
    CFMutableArrayRef authArray; // List of saved authentication objects for re-use
    CFMutableArrayRef proxyAuthArray; // Same as the authArray, but proxy specific
    CFMutableDictionaryRef credentialsDict; // Map of authentication objects to credentials for that object
    
    BOOL saveCredentials;   // Held long enough to know that authentication succeeded and credentials should be saved.
    BOOL ignoreKeychain;    // Used to bypass Keychain entries in the case where they are known to be wrong.
    
    // Authentication is only ever in flux with one server at a time.
    // It will be a proxy server that is being navigated or the far
    // end host.  Once through the proxy, it is know that it is the
    // far end that is being negotiated.  This boolean is use to know
    // if all the prompting and the current credentials are being
    // used to navigate the proxy.  After it has successfully negotiated
    // the proxy, this boolean will be false and it is known that we
    // are then negotiating with the far end host.
    BOOL isProxyAuthentication;
}
 
- (id)initWithImageClient:(ImageClient *)imgClient;
 
// Called by ImageClient to start and stop loads
- (void)loadURL:(NSURL *)url;
- (void)cancelLoad;
 
// Internal routine that does the actual work of a load
- (void)loadRequest;
 
// Called when the readStream signals new events
- (void)handleStreamEvent:(CFStreamEventType)event;
 
// Called when the system proxy changes
- (void)proxyChanged; 
 
// Examines the server response to determine if it is an authentication challenge
- (BOOL)isAuthorizationFailure;
 
// Cancels the current load and handles authentication failure
- (void)retryAfterAuthorizationFailure;
 
// Restarts a request after user is prompted for credentials
- (void)resumeWithCredentials;
 
// Find the pertinent authentication object in the list of them.
- (CFHTTPAuthenticationRef)findAuthenticationForRequest;
 
// Find the credentials dictionary for authentication
- (CFMutableDictionaryRef)findCredentialsForAuthentication:(CFHTTPAuthenticationRef)auth;
 
// Will find and save the credentials for the recent request.
- (void)saveCredentialsForRequest;
 
// Find the pertinent authentication object in the list of them.
- (CFHTTPAuthenticationRef)findProxyAuthenticationForRequest;
 
// Find the credentials dictionary for authentication
- (CFMutableDictionaryRef)findCredentialsForProxyAuthentication:(CFHTTPAuthenticationRef)auth;
 
@end