I found a Solution for my Problem. Sublcassing was the right approach but not UIWebView but a own NSURLProtocol.
So what I did:
Create an own Sublcass of NSURLProtocol
@interface MyURL : NSURLProtocol <NSURLConnectionDelegate>
Add some standard handling for HTTP-Connections
@interface MyURL () <NSURLConnectionDelegate>
@property (nonatomic, strong) NSURLConnection *connection;
@property (nonatomic, strong) NSMutableData *mutableData;
@property (nonatomic, strong) NSURLResponse *response;
@end
@implementation MyURL
+ (NSURLRequest *)canonicalRequestForRequest:(NSURLRequest *)request
{
return request;
}
- (void)stopLoading
{
[self.connection cancel];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
[self.client URLProtocol:self didLoadData:data];
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
[self.client URLProtocol:self didFailWithError:error];
self.connection = nil;
}
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
[self.client URLProtocol:self didReceiveResponse:response cacheStoragePolicy:NSURLCacheStorageAllowed];
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
[self.client URLProtocolDidFinishLoading:self];
self.connection = nil;
}
@end
And now the interesting part - Modifying every request that goes to my server
So first: Check if this Request goes to my Server and determine if my protocol should take care of it
+ (BOOL)canInitWithRequest:(NSURLRequest *)request
{
NSString *token = [[NSUserDefaults standardUserDefaults] stringForKey:kDefaultsKeyLoginToken];
NSString *hash = [[NSUserDefaults standardUserDefaults] stringForKey:kDefaultsKeyLoginHash];
if([NSURLProtocol propertyForKey:@"TokenSet" inRequest:request]) return NO; // We already handled it
if((hash == nil) || (token == nil) ) return NO; // We are not logged in
NSString *params = [NSString stringWithFormat:@"mobile=app&user_token=%@&user_hash=%@",token,hash];
if (([[[request URL] absoluteString] rangeOfString:BASE_URL].location != NSNotFound) && ([[[request URL] absoluteString] rangeOfString:@"/assets/"].location == NSNotFound)){
if([[[request URL] absoluteString] rangeOfString:params].location == NSNotFound){
return YES; // URL does not contain the login token & we're not requesting an asset (js/img/etc.)
}
}
return NO;
}
So if + (BOOL)canInitWithRequest:(NSURLRequest *)request returned yes, I have to handle the request. I already know that it does not contain the login token & hash so I've got to determine if it has to be appended or not. To modify the request in general, I create a MutableCopy of our request, Modify it and set our URLConnection to the request.
- (void)startLoading
{
NSMutableURLRequest *newRequest = [self.request mutableCopy];
NSString *PreURL;
NSString *token = [[NSUserDefaults standardUserDefaults] stringForKey:kDefaultsKeyLoginToken];
NSString *hash = [[NSUserDefaults standardUserDefaults] stringForKey:kDefaultsKeyLoginHash];
NSString *params = [NSString stringWithFormat:@"mobile=app&user_token=%@&user_hash=%@",token,hash];
if([[newRequest URL] query] == nil) {
PreURL = [NSString stringWithFormat:@"%@?%@",[[newRequest URL] absoluteString],params];
}else{
if([[[newRequest URL] absoluteString] rangeOfString:params].location == NSNotFound){
PreURL = [NSString stringWithFormat:@"%@&%@",[[newRequest URL] absoluteString],params];
}
}
NSURL *nsurl = [NSURL URLWithString: PreURL];
[newRequest setURL:nsurl];
[NSURLProtocol setProperty:@"YES" forKey:@"TokenSet" inRequest:newRequest];
self.connection = [NSURLConnection connectionWithRequest:newRequest delegate:self];
}
And to finish it all, we register our URL-Protocol as Protocol in AppDelegate.
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
[NSURLProtocol registerClass:[MyURL class]];
}
With this Solution I first have the advantage of having my login token in ANY request ANY part of my App sends to my Server. No more worries about this. And I can do cool stuff, like saving resources after loading them the first time or even use Images from my App-Bundle in Webviews...
I hope this helps someone.