154 lines
4.7 KiB
Objective-C
154 lines
4.7 KiB
Objective-C
/******************************************************************************
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* $Id$
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*
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* Copyright (c) 2006-2009 Transmission authors and contributors
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*****************************************************************************/
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#import "PortChecker.h"
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#define CHECKER_URL @"http://portcheck.transmissionbt.com/%d"
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#define CHECK_FIRE 3.0
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@interface PortChecker (Private)
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- (void) startProbe;
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- (void) callBackWithStatus: (port_status_t) status;
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@end
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@implementation PortChecker
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- (id) initForPort: (NSInteger) portNumber delay: (BOOL) delay withDelegate: (id) delegate
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{
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if ((self = [super init]))
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{
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fDelegate = delegate;
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fPortNumber = portNumber;
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fStatus = PORT_STATUS_CHECKING;
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if (delay)
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fTimer = [NSTimer scheduledTimerWithTimeInterval: CHECK_FIRE target: self
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selector: @selector(startProbe) userInfo: nil repeats: NO];
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else
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[self startProbe];
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}
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return self;
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}
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- (void) dealloc
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{
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[fTimer invalidate];
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[fConnection release];
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[fPortProbeData release];
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[super dealloc];
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}
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- (port_status_t) status
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{
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return fStatus;
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}
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- (void) cancelProbe
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{
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[fTimer invalidate];
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fTimer = nil;
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[fConnection cancel];
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}
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- (void) connection: (NSURLConnection *) connection didReceiveResponse: (NSURLResponse *) response
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{
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[fPortProbeData setLength: 0];
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}
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- (void) connection: (NSURLConnection *) connection didReceiveData: (NSData *) data
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{
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[fPortProbeData appendData: data];
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}
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- (void) connection: (NSURLConnection *) connection didFailWithError: (NSError *) error
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{
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NSLog(@"Unable to get port status: connection failed (%@)", [error localizedDescription]);
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[self callBackWithStatus: PORT_STATUS_ERROR];
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}
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- (void) connectionDidFinishLoading: (NSURLConnection *) connection
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{
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NSString * probeString = [[NSString alloc] initWithData: fPortProbeData encoding: NSUTF8StringEncoding];
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[fPortProbeData release];
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fPortProbeData = nil;
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if (probeString)
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{
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if ([probeString isEqualToString: @"1"])
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[self callBackWithStatus: PORT_STATUS_OPEN];
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else if ([probeString isEqualToString: @"0"])
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[self callBackWithStatus: PORT_STATUS_CLOSED];
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else
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{
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NSLog([NSString stringWithFormat: @"Unable to get port status: invalid response (%@)", probeString]);
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[self callBackWithStatus: PORT_STATUS_ERROR];
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}
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[probeString release];
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}
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else
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{
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NSLog(@"Unable to get port status: invalid data received");
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[self callBackWithStatus: PORT_STATUS_ERROR];
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}
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}
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@end
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@implementation PortChecker (Private)
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- (void) startProbe
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{
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fTimer = nil;
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NSURLRequest * portProbeRequest = [NSURLRequest requestWithURL: [NSURL URLWithString:
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[NSString stringWithFormat: CHECKER_URL, fPortNumber]]
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cachePolicy: NSURLRequestReloadIgnoringLocalAndRemoteCacheData timeoutInterval: 15.0];
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if ((fConnection = [[NSURLConnection alloc] initWithRequest: portProbeRequest delegate: self]))
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fPortProbeData = [[NSMutableData alloc] init];
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else
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{
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NSLog(@"Unable to get port status: failed to initiate connection");
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[self callBackWithStatus: PORT_STATUS_ERROR];
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}
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}
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- (void) callBackWithStatus: (port_status_t) status
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{
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fStatus = status;
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if (fDelegate && [fDelegate respondsToSelector: @selector(portCheckerDidFinishProbing:)])
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[fDelegate performSelectorOnMainThread: @selector(portCheckerDidFinishProbing:) withObject: self waitUntilDone: NO];
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}
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@end
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