TWTHasselhoffImageProtocol

TWTHasselhoffImageProtocol.h

//
//  TWTHasselhoffImageProtocol.h
//  TestURLProtocol
//
//  Created by Josh Johnson on 5/9/14.
//  Copyright (c) 2014 Two Toasters, LLC. All rights reserved.
//

@import Foundation;

@interface TWTHasselhoffImageProtocol : NSURLProtocol

@end

TWTHasselhoffImageProtocol.m

//
//  TWTHasselhoffImageProtocol.m
//  TestURLProtocol
//
//  Created by Josh Johnson on 5/9/14.
//  Copyright (c) 2014 Two Toasters, LLC. All rights reserved.
//

#import "TWTHasselhoffImageProtocol.h"

@implementation TWTHasselhoffImageProtocol

+ (BOOL)canInitWithRequest:(NSURLRequest *)request
{
    NSSet *validContentTypes = [NSSet setWithArray:@[ @"image/png",
                                                      @"image/jpg",
                                                      @"image/jpeg" ]];
    
    return [validContentTypes containsObject:request.allHTTPHeaderFields[@"Content-Type"]];
}


+ (NSURLRequest *)canonicalRequestForRequest:(NSURLRequest *)request
{
    return request;
}


- (NSCachedURLResponse *)cachedResponse
{
    return nil;
}


- (void)startLoading
{
    id <NSURLProtocolClient> client = self.client;
    NSURLRequest *request = self.request;
    
    NSDictionary *headers = @{ @"Content-Type": @"image/jpeg" };
    NSData *imageData = UIImageJPEGRepresentation([UIImage imageNamed:@"David_Hasselhoff.jpeg"], 1.0);

    NSHTTPURLResponse *response = [[NSHTTPURLResponse alloc] initWithURL:request.URL
                                                              statusCode:200
                                                             HTTPVersion:@"HTTP/1.1"
                                                            headerFields:headers];
    
    [client URLProtocol:self didReceiveResponse:response cacheStoragePolicy:NSURLCacheStorageNotAllowed];
    [client URLProtocol:self didLoadData:imageData];
    [client URLProtocolDidFinishLoading:self];
}


- (void)stopLoading
{
    // Must be implemented
}

@end

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