154 lines
4.6 KiB
Plaintext
154 lines
4.6 KiB
Plaintext
/******************************************************************************
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* Copyright (c) 2006-2012 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(port) [NSString stringWithFormat:@"https://portcheck.transmissionbt.com/%ld", port]
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#define CHECK_FIRE 3.0
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@interface PortChecker (Private)
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- (void)startProbe:(NSTimer*)timer;
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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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- (instancetype)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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fStatus = PORT_STATUS_CHECKING;
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fTimer = [NSTimer scheduledTimerWithTimeInterval:CHECK_FIRE target:self selector:@selector(startProbe:)
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userInfo:@(portNumber)
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repeats:NO];
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if (!delay)
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{
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[fTimer fire];
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}
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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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}
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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.length = 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 = nil;
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if (probeString)
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{
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if ([probeString isEqualToString:@"1"])
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{
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[self callBackWithStatus:PORT_STATUS_OPEN];
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}
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else if ([probeString isEqualToString:@"0"])
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{
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[self callBackWithStatus:PORT_STATUS_CLOSED];
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}
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else
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{
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NSLog(@"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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}
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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:(NSTimer*)timer
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{
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fTimer = nil;
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NSURLRequest* portProbeRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:CHECKER_URL([[timer userInfo] integerValue])]
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cachePolicy:NSURLRequestReloadIgnoringLocalAndRemoteCacheData
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timeoutInterval:15.0];
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if ((fConnection = [[NSURLConnection alloc] initWithRequest:portProbeRequest delegate:self]))
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{
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fPortProbeData = [[NSMutableData alloc] init];
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}
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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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{
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[fDelegate performSelectorOnMainThread:@selector(portCheckerDidFinishProbing:) withObject:self waitUntilDone:NO];
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}
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}
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@end
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