NSURLProtocol isn't asked to load after YES response to canInitWithRequest

Question

I\'m registering an implementation of NSURLProtocol to do some custom handling of certain URL requests (I tag these requests by setting properties on them). These URL reques

Answer 1

*** Way to clear the cache of webview **********
Follow this code:

NSHTTPCookieStorage *storage = [NSHTTPCookieStorage sharedHTTPCookieStorage];
    for (NSHTTPCookie *cookie in [storage cookies]) {
        [storage deleteCookie:cookie];
    }
    [[NSUserDefaults standardUserDefaults] synchronize];

Answer 2

I was able to workaround this issue by cache-busting the UIWebView cache, while not busting the NSURLCache.

1. Add a unique param to the query params of the original request. I chose 'key=000000' where the value is zero-led six digit random number.
2. In the protocol, strip the key in canonicalRequestForRequest: and in initWithRequest:cachedResponse:client

My stripping code looks like this (there might be a cleaner way to strip the param, but this works):

+ (NSURLRequest *)canonicalRequestForRequest:(NSURLRequest *)request
{
    NSURLRequest *canonicalRequest = request;
    BOOL myProtocolRequest = [[NSURLProtocol propertyForKey:kMYProtocolRequest inRequest:request] boolValue];
    if (myProtocolRequest)
    {
        NSMutableURLRequest *mutableRequest = [request mutableCopyWorkaround];
        NSString *originalURLString = mutableRequest.URL.absoluteString;
        NSString *regexString = [NSString stringWithFormat:@"(?:[?&])(key=[[:digit:]]{%d}&*)", kMYKeyLength];

        NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:regexString options:0 error:0];
        NSTextCheckingResult *result = [regex firstMatchInString:originalURLString options:0 range:NSMakeRange(0, originalURLString.length)];
        if (result.numberOfRanges > 1)
        {
            NSRange keyRange = [result rangeAtIndex:1];
            NSLog(@"Removing '%@' from request", [originalURLString substringWithRange:keyRange]);
            NSString *replacementURLString = [originalURLString stringByReplacingCharactersInRange:keyRange withString:@""];
            mutableRequest.URL = [NSURL URLWithString:replacementURLString];
            canonicalRequest = mutableRequest;
        }
    }

    return canonicalRequest;
}

My init code looks like this:

- (id)initWithRequest:(NSURLRequest *)request cachedResponse:(NSCachedURLResponse *)cachedResponse client:(id<NSURLProtocolClient>)client
{
    self = [super initWithRequest:[MYURLProtocol canonicalRequestForRequest:request] cachedResponse:cachedResponse client:client];
    return self;
}

I don't like that I have to do this, but I'm finally getting exactly the behavior I want. Hopefully it helps someone out there.