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KVDownload.m
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KVDownload.m
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//
// KVDownload.m
// Koolistov
//
// Created by Johan Kool on 28-10-10.
// Copyright 2010-2011 Koolistov. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice, this list of
// conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice, this list
// of conditions and the following disclaimer in the documentation and/or other materials
// provided with the distribution.
// * Neither the name of KOOLISTOV nor the names of its contributors may be used to
// endorse or promote products derived from this software without specific prior written
// permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
// OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
#import "KVDownload.h"
@interface KVDownload ()
@property (nonatomic, assign, readwrite) float downloadProgress;
@property (retain) NSURLConnection *connection;
@property (retain) NSMutableData *receivedData;
@end
@implementation KVDownload
@synthesize URLRequest = URLRequest_;
@synthesize URLResponse = URLResponse_;
@synthesize completionHandler = completionHandler_;
@synthesize downloadProgress = downloadProgress_;
@synthesize connection = connection_;
@synthesize receivedData = receivedData_;
+ (id)startDownloadWithRequest:(NSURLRequest *)anURLRequest completionHandler:(void (^)(NSURLResponse * response, NSData * data, NSError * error))completionHandler {
KVDownload *download = [[[self class] alloc] init];
download.URLRequest = anURLRequest;
download.completionHandler = completionHandler;
[download send];
return [download autorelease];
}
- (void)dealloc {
self.URLRequest = nil;
self.URLResponse = nil;
self.completionHandler = nil;
self.connection = nil;
self.receivedData = nil;
[super dealloc];
}
#pragma mark - Main
- (BOOL)cancel {
if (!self.connection) {
return NO;
}
[self.connection cancel];
self.completionHandler(nil, nil, nil);
self.connection = nil;
return YES;
}
- (void)send {
// Create the connection
self.connection = [[[NSURLConnection alloc] initWithRequest:self.URLRequest delegate:self] autorelease];
if (self.connection) {
self.receivedData = [NSMutableData data];
} else {
NSError *error = [NSError errorWithDomain:@"KVDownload" code:1 userInfo:[NSDictionary dictionaryWithObjectsAndKeys:@"Could not create connection", NSLocalizedDescriptionKey, nil]];
// Run completion handler
self.completionHandler(nil, nil, error);
}
}
#pragma mark - NSURLConnection delegate methods
// Called when the HTTP socket gets a response.
- (void)connection:(NSURLConnection *)aConnection didReceiveResponse:(NSURLResponse *)response {
self.URLResponse = response;
[self.receivedData setLength:0];
}
// Called when the HTTP socket received data.
- (void)connection:(NSURLConnection *)aConnection didReceiveData:(NSData *)value {
[self.receivedData appendData:value];
if ([self.URLResponse isKindOfClass:[NSHTTPURLResponse class]]) {
NSHTTPURLResponse *response = (NSHTTPURLResponse *)self.URLResponse;
if ([response statusCode] == 200) {
self.downloadProgress = ([self.receivedData length] / [response expectedContentLength]);
} else {
self.downloadProgress = -1.0f;
}
} else {
self.downloadProgress = -1.0f;
}
}
// Called when the HTTP request fails.
- (void)connection:(NSURLConnection *)aConnection didFailWithError:(NSError *)error {
// Run completion handler
self.completionHandler(self.URLResponse, self.receivedData, error);
self.connection = nil;
self.receivedData = nil;
}
// Called when the connection has finished loading.
- (void)connectionDidFinishLoading:(NSURLConnection *)aConnection {
// Run completion handler
self.completionHandler(self.URLResponse, self.receivedData, nil);
self.connection = nil;
self.receivedData = nil;
}
// Called if the HTTP request receives an authentication challenge.
- (void)connection:(NSURLConnection *)aConnection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge {
NSArray *trustedHosts = [[NSUserDefaults standardUserDefaults] arrayForKey:@"trustedHosts"];
if ([challenge previousFailureCount] == 0) {
if ([challenge.protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodServerTrust]) {
BOOL isTrustedHost = NO;
for (NSString *trustedHost in trustedHosts) {
if ([trustedHost isEqualToString:challenge.protectionSpace.host]) {
isTrustedHost = YES;
break;
}
}
if (isTrustedHost) {
[[challenge sender] useCredential:[NSURLCredential credentialForTrust:challenge.protectionSpace.serverTrust] forAuthenticationChallenge:challenge];
} else {
[[challenge sender] cancelAuthenticationChallenge:challenge];
}
}
} else {
[[challenge sender] cancelAuthenticationChallenge:challenge];
}
}
- (BOOL)connection:(NSURLConnection *)connection canAuthenticateAgainstProtectionSpace:(NSURLProtectionSpace *)protectionSpace {
return [protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodServerTrust];
}
@end