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Added basic support for Icecast streams

This commit is contained in:
Thong Nguyen 2014-11-08 15:45:40 +00:00
parent b07270910b
commit cba7db8112
11 changed files with 320 additions and 82 deletions
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9
ExampleApp/ExampleApp/AppDelegate.m
View File

@ -68,6 +68,15 @@
[audioPlayer setDataSource:dataSource withQueueItemId:[[SampleQueueId alloc] initWithUrl:url andCount:0]];
}
-(void) audioPlayerViewPlayFromIcecastSelected:(AudioPlayerView *)audioPlayerView
{
NSURL* url = [NSURL URLWithString:@"http://shoutmedia.abc.net.au:10326"];
STKDataSource* dataSource = [STKAudioPlayer dataSourceFromURL:url];
[audioPlayer setDataSource:dataSource withQueueItemId:[[SampleQueueId alloc] initWithUrl:url andCount:0]];
}
-(void) audioPlayerViewQueueShortFileSelected:(AudioPlayerView*)audioPlayerView
{
NSString* path = [[NSBundle mainBundle] pathForResource:@"airplane" ofType:@"aac"];

2
ExampleApp/ExampleApp/AudioPlayerView.h
View File

@ -39,6 +39,7 @@
@protocol AudioPlayerViewDelegate<NSObject>
-(void) audioPlayerViewPlayFromHTTPSelected:(AudioPlayerView*)audioPlayerView;
-(void) audioPlayerViewPlayFromIcecastSelected:(AudioPlayerView*)audioPlayerView;
-(void) audioPlayerViewQueueShortFileSelected:(AudioPlayerView*)audioPlayerView;
-(void) audioPlayerViewPlayFromLocalFileSelected:(AudioPlayerView*)audioPlayerView;
-(void) audioPlayerViewQueuePcmWaveFileSelected:(AudioPlayerView*)audioPlayerView;
@ -57,6 +58,7 @@
UIButton* playButton;
UIButton* stopButton;
UIButton* playFromHTTPButton;
UIButton* playFromIcecastButton;
UIButton* queueShortFileButton;
UIButton* queuePcmWaveFileFromHTTPButton;
UIButton* playFromLocalFileButton;

29
ExampleApp/ExampleApp/AudioPlayerView.m
View File

@ -61,39 +61,44 @@
playFromHTTPButton.frame = CGRectMake((320 - size.width) / 2, frame.size.height * 0.10, size.width, size.height);
[playFromHTTPButton addTarget:self action:@selector(playFromHTTPButtonTouched) forControlEvents:UIControlEventTouchUpInside];
[playFromHTTPButton setTitle:@"Play from HTTP" forState:UIControlStateNormal];
playFromIcecastButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
playFromIcecastButton.frame = CGRectMake((320 - size.width) / 2, frame.size.height * 0.10 + 50, size.width, size.height);
[playFromIcecastButton addTarget:self action:@selector(playFromIcecasButtonTouched) forControlEvents:UIControlEventTouchUpInside];
[playFromIcecastButton setTitle:@"Play from Icecast" forState:UIControlStateNormal];
playFromLocalFileButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
playFromLocalFileButton.frame = CGRectMake((320 - size.width) / 2, frame.size.height * 0.10 + 50, size.width, size.height);
playFromLocalFileButton.frame = CGRectMake((320 - size.width) / 2, frame.size.height * 0.10 + 100, size.width, size.height);
[playFromLocalFileButton addTarget:self action:@selector(playFromLocalFileButtonTouched) forControlEvents:UIControlEventTouchUpInside];
[playFromLocalFileButton setTitle:@"Play from Local File" forState:UIControlStateNormal];
queueShortFileButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
queueShortFileButton.frame = CGRectMake((320 - size.width) / 2, frame.size.height * 0.10 + 100, size.width, size.height);
queueShortFileButton.frame = CGRectMake((320 - size.width) / 2, frame.size.height * 0.10 + 150, size.width, size.height);
[queueShortFileButton addTarget:self action:@selector(queueShortFileButtonTouched) forControlEvents:UIControlEventTouchUpInside];
[queueShortFileButton setTitle:@"Queue short file" forState:UIControlStateNormal];
queuePcmWaveFileFromHTTPButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
queuePcmWaveFileFromHTTPButton.frame = CGRectMake((320 - size.width) / 2, frame.size.height * 0.10 + 150, size.width, size.height);
queuePcmWaveFileFromHTTPButton.frame = CGRectMake((320 - size.width) / 2, frame.size.height * 0.10 + 280, size.width, size.height);
[queuePcmWaveFileFromHTTPButton addTarget:self action:@selector(queuePcmWaveFileButtonTouched) forControlEvents:UIControlEventTouchUpInside];
[queuePcmWaveFileFromHTTPButton setTitle:@"Queue PCM/WAVE from HTTP" forState:UIControlStateNormal];
size = CGSizeMake(90, 40);
playButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
playButton.frame = CGRectMake(30, 380, size.width, size.height);
playButton.frame = CGRectMake(30, 400, size.width, size.height);
[playButton addTarget:self action:@selector(playButtonPressed) forControlEvents:UIControlEventTouchUpInside];
stopButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
stopButton.frame = CGRectMake((320 - size.width) - 30, 380, size.width, size.height);
stopButton.frame = CGRectMake((320 - size.width) - 30, 400, size.width, size.height);
[stopButton addTarget:self action:@selector(stopButtonPressed) forControlEvents:UIControlEventTouchUpInside];
[stopButton setTitle:@"Stop" forState:UIControlStateNormal];
muteButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
muteButton.frame = CGRectMake((320 - size.width) - 30, 410, size.width, size.height);
muteButton.frame = CGRectMake((320 - size.width) - 30, 420, size.width, size.height);
[muteButton addTarget:self action:@selector(muteButtonPressed) forControlEvents:UIControlEventTouchUpInside];
[muteButton setTitle:@"Mute" forState:UIControlStateNormal];
slider = [[UISlider alloc] initWithFrame:CGRectMake(20, 320, 280, 20)];
slider = [[UISlider alloc] initWithFrame:CGRectMake(20, 320, queuePcmWaveFileFromHTTPButton.frame.origin.y + queuePcmWaveFileFromHTTPButton.frame.size.height + 20, 20)];
slider.continuous = YES;
[slider addTarget:self action:@selector(sliderChanged) forControlEvents:UIControlEventValueChanged];
@ -106,11 +111,11 @@
[enableEqSwitch addTarget:self action:@selector(onEnableEqSwitch) forControlEvents:UIControlEventAllTouchEvents];
label = [[UILabel alloc] initWithFrame:CGRectMake(0, slider.frame.origin.y + slider.frame.size.height + 10, frame.size.width, 25)];
label = [[UILabel alloc] initWithFrame:CGRectMake(0, slider.frame.origin.y + slider.frame.size.height + 40, frame.size.width, 25)];
label.textAlignment = NSTextAlignmentCenter;
statusLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, slider.frame.origin.y + slider.frame.size.height + label.frame.size.height + 8, frame.size.width, 50)];
statusLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, slider.frame.origin.y + slider.frame.size.height + label.frame.size.height + 50, frame.size.width, 50)];
statusLabel.textAlignment = NSTextAlignmentCenter;
@ -121,6 +126,7 @@
[self addSubview:slider];
[self addSubview:playButton];
[self addSubview:playFromHTTPButton];
[self addSubview:playFromIcecastButton];
[self addSubview:playFromLocalFileButton];
[self addSubview:queueShortFileButton];
[self addSubview:queuePcmWaveFileFromHTTPButton];
@ -203,6 +209,11 @@
[self.delegate audioPlayerViewPlayFromHTTPSelected:self];
}
-(void) playFromIcecasButtonTouched
{
[self.delegate audioPlayerViewPlayFromIcecastSelected:self];
}
-(void) playFromLocalFileButtonTouched
{
[self.delegate audioPlayerViewPlayFromLocalFileSelected:self];

10
StreamingKit.xcworkspace/xcshareddata/StreamingKit.xccheckout
View File

@ -10,29 +10,29 @@
<string>StreamingKit</string>
<key>IDESourceControlProjectOriginsDictionary</key>
<dict>
<key>DD310C30-B3D0-4BD7-9565-9F29F09CC4F8</key>
<key>3E9414865BAE5433092B9D136FFC1F054EA505C2</key>
<string>https://github.com/tumtumtum/StreamingKit.git</string>
</dict>
<key>IDESourceControlProjectPath</key>
<string>StreamingKit.xcworkspace</string>
<key>IDESourceControlProjectRelativeInstallPathDictionary</key>
<dict>
<key>DD310C30-B3D0-4BD7-9565-9F29F09CC4F8</key>
<key>3E9414865BAE5433092B9D136FFC1F054EA505C2</key>
<string>..</string>
</dict>
<key>IDESourceControlProjectURL</key>
<string>https://github.com/tumtumtum/StreamingKit.git</string>
<key>IDESourceControlProjectVersion</key>
<integer>110</integer>
<integer>111</integer>
<key>IDESourceControlProjectWCCIdentifier</key>
<string>DD310C30-B3D0-4BD7-9565-9F29F09CC4F8</string>
<string>3E9414865BAE5433092B9D136FFC1F054EA505C2</string>
<key>IDESourceControlProjectWCConfigurations</key>
<array>
<dict>
<key>IDESourceControlRepositoryExtensionIdentifierKey</key>
<string>public.vcs.git</string>
<key>IDESourceControlWCCIdentifierKey</key>
<string>DD310C30-B3D0-4BD7-9565-9F29F09CC4F8</string>
<string>3E9414865BAE5433092B9D136FFC1F054EA505C2</string>
<key>IDESourceControlWCCName</key>
<string>StreamingKit</string>
</dict>

4
StreamingKit/StreamingKit.xcodeproj/project.pbxproj
View File

@ -401,7 +401,7 @@
isa = PBXProject;
attributes = {
CLASSPREFIX = STK;
LastUpgradeCheck = 0510;
LastUpgradeCheck = 0610;
ORGANIZATIONNAME = "Thong Nguyen";
};
buildConfigurationList = A1E7C4C3188D57F50010896F /* Build configuration list for PBXProject "StreamingKit" */;
@ -554,6 +554,7 @@
A1A49988189E744500E2A2E2 /* Debug */ = {
isa = XCBuildConfiguration;
buildSettings = {
COMBINE_HIDPI_IMAGES = YES;
FRAMEWORK_SEARCH_PATHS = (
"$(inherited)",
"$(DEVELOPER_FRAMEWORKS_DIR)",
@ -574,6 +575,7 @@
A1A49989189E744500E2A2E2 /* Release */ = {
isa = XCBuildConfiguration;
buildSettings = {
COMBINE_HIDPI_IMAGES = YES;
DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
FRAMEWORK_SEARCH_PATHS = (
"$(inherited)",

19
StreamingKit/StreamingKit/STKAudioPlayer.m
View File

@ -294,7 +294,7 @@ static void AudioFileStreamPacketsProc(void* clientData, UInt32 numberBytes, UIn
.componentFlagsMask = 0
};
const int bytesPerSample = sizeof(AudioSampleType);
const int bytesPerSample = 2;
canonicalAudioStreamBasicDescription = (AudioStreamBasicDescription)
{
@ -1868,7 +1868,7 @@ static BOOL GetHardwareCodecClassDesc(UInt32 formatId, AudioClassDescription* cl
{
OSStatus status;
Boolean writable;
UInt32 cookieSize;
UInt32 cookieSize = 0;
if (memcmp(asbd, &audioConverterAudioStreamBasicDescription, sizeof(AudioStreamBasicDescription)) == 0)
{
@ -1900,11 +1900,16 @@ static BOOL GetHardwareCodecClassDesc(UInt32 formatId, AudioClassDescription* cl
audioConverterAudioStreamBasicDescription = *asbd;
status = AudioFileStreamGetPropertyInfo(audioFileStream, kAudioFileStreamProperty_MagicCookieData, &cookieSize, &writable);
if (self->currentlyReadingEntry.dataSource.audioFileTypeHint != kAudioFileAAC_ADTSType)
{
status = AudioFileStreamGetPropertyInfo(audioFileStream, kAudioFileStreamProperty_MagicCookieData, &cookieSize, &writable);
if (!status)
{
void* cookieData = alloca(cookieSize);
if (status)
{
return;
}
void* cookieData = alloca(cookieSize);
status = AudioFileStreamGetProperty(audioFileStream, kAudioFileStreamProperty_MagicCookieData, &cookieSize, cookieData);
@ -1917,6 +1922,8 @@ static BOOL GetHardwareCodecClassDesc(UInt32 formatId, AudioClassDescription* cl
if (status)
{
[self unexpectedError:STKAudioPlayerErrorAudioSystemError];
return;
}
}

3
StreamingKit/StreamingKit/STKCoreFoundationDataSource.h
View File

@ -43,9 +43,10 @@
@interface STKCoreFoundationDataSource : STKDataSource
{
@public
CFReadStreamRef stream;
@protected
BOOL isInErrorState;
CFReadStreamRef stream;
NSRunLoop* eventsRunLoop;
}

2
StreamingKit/StreamingKit/STKCoreFoundationDataSource.m
View File

@ -41,8 +41,10 @@ static void ReadStreamCallbackProc(CFReadStreamRef stream, CFStreamEventType eve
switch (eventType)
{
case kCFStreamEventErrorOccurred:
{
[datasource errorOccured];
break;
}
case kCFStreamEventEndEncountered:
[datasource eof];
break;

1
StreamingKit/StreamingKit/STKDataSource.h
View File

@ -45,6 +45,7 @@
@interface STKDataSource : NSObject
@property (readonly) BOOL supportsSeek;
@property (readonly) SInt64 position;
@property (readonly) SInt64 length;
@property (readonly) BOOL hasBytesAvailable;

5
StreamingKit/StreamingKit/STKDataSource.m
View File

@ -79,4 +79,9 @@
return 0;
}
-(BOOL) supportsSeek
{
return YES;
}
@end

318
StreamingKit/StreamingKit/STKHTTPDataSource.m
View File

@ -38,12 +38,19 @@
@interface STKHTTPDataSource()
{
@private
BOOL supportsSeek;
UInt32 httpStatusCode;
SInt64 seekStart;
SInt64 relativePosition;
SInt64 fileLength;
int discontinuous;
int requestSerialNumber;
int prefixBytesRead;
NSData* prefixBytes;
NSMutableData* iceHeaderData;
BOOL iceHeaderSearchComplete;
BOOL iceHeaderAvailable;
BOOL httpHeaderNotAvailable;
NSURL* currentUrl;
STKAsyncURLProvider asyncUrlProvider;
@ -147,70 +154,230 @@
return audioFileTypeHint;
}
-(void) dataAvailable
-(BOOL) parseHttpHeader
{
if (stream == NULL) {
return;
}
if (self.httpStatusCode == 0)
{
CFTypeRef response = CFReadStreamCopyProperty(stream, kCFStreamPropertyHTTPResponseHeader);
if (!httpHeaderNotAvailable)
{
CFTypeRef response = CFReadStreamCopyProperty(stream, kCFStreamPropertyHTTPResponseHeader);
if (response)
{
httpHeaders = (__bridge_transfer NSDictionary*)CFHTTPMessageCopyAllHeaderFields((CFHTTPMessageRef)response);
self->httpStatusCode = (UInt32)CFHTTPMessageGetResponseStatusCode((CFHTTPMessageRef)response);
if (httpHeaders.count == 0)
{
httpHeaderNotAvailable = YES;
}
else
{
self->httpStatusCode = (UInt32)CFHTTPMessageGetResponseStatusCode((CFHTTPMessageRef)response);
}
CFRelease(response);
}
if (self.httpStatusCode == 200)
{
if (seekStart == 0)
{
fileLength = (SInt64)[[httpHeaders objectForKey:@"Content-Length"] longLongValue];
}
NSString* contentType = [httpHeaders objectForKey:@"Content-Type"];
AudioFileTypeID typeIdFromMimeType = [STKHTTPDataSource audioFileTypeHintFromMimeType:contentType];
if (typeIdFromMimeType != 0)
{
audioFileTypeHint = typeIdFromMimeType;
}
}
else if (self.httpStatusCode == 206)
{
NSString* contentRange = [httpHeaders objectForKey:@"Content-Range"];
NSArray* components = [contentRange componentsSeparatedByString:@"/"];
if (components.count == 2)
{
fileLength = [[components objectAtIndex:1] integerValue];
}
}
else if (self.httpStatusCode == 416)
{
if (self.length >= 0)
{
seekStart = self.length;
}
[self eof];
return;
}
else if (self.httpStatusCode >= 300)
{
[self errorOccured];
return;
}
}
if (httpHeaderNotAvailable)
{
if (self->iceHeaderSearchComplete && !self->iceHeaderAvailable)
{
return YES;
}
if (!self->iceHeaderSearchComplete)
{
UInt8 byte;
UInt8 bytes[4];
UInt8 terminal1[] = { '\n', '\n' };
UInt8 terminal2[] = { '\r', '\n', '\r', '\n' };
if (iceHeaderData == nil)
{
iceHeaderData = [NSMutableData dataWithCapacity:1024];
}
while (true)
{
if (![self hasBytesAvailable])
{
break;
}
int read = [super readIntoBuffer:&byte withSize:1];
if (read <= 0)
{
break;
}
[iceHeaderData appendBytes:&byte length:read];
if (iceHeaderData.length >= sizeof(terminal1))
{
[iceHeaderData getBytes:&bytes[0] range:(NSRange){.location = iceHeaderData.length - sizeof(terminal1), .length = sizeof(terminal1)}];
if (memcmp(&terminal1[0], &bytes[0], sizeof(terminal1)) == 0)
{
self->iceHeaderAvailable = YES;
self->iceHeaderSearchComplete = YES;
break;
}
}
if (iceHeaderData.length >= sizeof(terminal2))
{
[iceHeaderData getBytes:&bytes[0] range:(NSRange){.location = iceHeaderData.length - sizeof(terminal2), .length = sizeof(terminal2)}];
if (memcmp(&terminal2[0], &bytes[0], sizeof(terminal2)) == 0)
{
self->iceHeaderAvailable = YES;
self->iceHeaderSearchComplete = YES;
break;
}
}
if (iceHeaderData.length >=4)
{
[iceHeaderData getBytes:&bytes[0] length:4];
if (memcmp(bytes, "ICY", 3) != 0 && memcmp(bytes, "HTTP", 4) != 0)
{
self->iceHeaderAvailable = NO;
self->iceHeaderSearchComplete = YES;
prefixBytes = iceHeaderData;
return YES;
}
}
}
if (!self->iceHeaderSearchComplete)
{
return NO;
}
}
NSCharacterSet* characterSet = [NSCharacterSet characterSetWithCharactersInString:@"\r\n"];
NSString* fullString = [[NSString alloc] initWithData:self->iceHeaderData encoding:NSUTF8StringEncoding];
NSArray* strings = [fullString componentsSeparatedByCharactersInSet:characterSet];
httpHeaders = [NSMutableDictionary dictionary];
for (NSString* s in strings)
{
if (s.length == 0)
{
continue;
}
if ([s hasPrefix:@"ICY"])
{
NSArray* ss = [s componentsSeparatedByString:@" "];
if (ss.count >= 2)
{
self->httpStatusCode = [ss[1] intValue];
}
}
NSRange range = [s rangeOfString:@":"];
if (range.location == NSNotFound)
{
continue;
}
NSString* key = [s substringWithRange: (NSRange){.location = 0, .length = range.location}];
NSString* value = [s substringFromIndex:range.location + 1];
[httpHeaders setValue:value forKey:key];
}
}
if (([httpHeaders objectForKey:@"Accepts-Ranges"] ?: [httpHeaders objectForKey:@"accepts-ranges"]) != nil)
{
self->supportsSeek = YES;
}
if (self.httpStatusCode == 200)
{
if (seekStart == 0)
{
id value = [httpHeaders objectForKey:@"Content-Length"] ?: [httpHeaders objectForKey:@"content-length"];
fileLength = (SInt64)[value longLongValue];
}
NSString* contentType = [httpHeaders objectForKey:@"Content-Type"] ?: [httpHeaders objectForKey:@"content-type"] ;
AudioFileTypeID typeIdFromMimeType = [STKHTTPDataSource audioFileTypeHintFromMimeType:contentType];
if (typeIdFromMimeType != 0)
{
audioFileTypeHint = typeIdFromMimeType;
}
}
else if (self.httpStatusCode == 206)
{
NSString* contentRange = [httpHeaders objectForKey:@"Content-Range"] ?: [httpHeaders objectForKey:@"content-range"];
NSArray* components = [contentRange componentsSeparatedByString:@"/"];
if (components.count == 2)
{
fileLength = [[components objectAtIndex:1] integerValue];
}
}
else if (self.httpStatusCode == 416)
{
if (self.length >= 0)
{
seekStart = self.length;
}
[self eof];
return NO;
}
else if (self.httpStatusCode >= 300)
{
[self errorOccured];
return NO;
}
return YES;
}
-(void) dataAvailable
{
if (stream == NULL)
{
return;
}
if (self.httpStatusCode == 0)
{
if ([self parseHttpHeader])
{
if ([self hasBytesAvailable])
{
[super dataAvailable];
}
return;
}
else
{
return;
}
}
[super dataAvailable];
else
{
[super dataAvailable];
}
}
-(SInt64) position
@ -250,6 +417,11 @@
self->isInErrorState = NO;
if (!self->supportsSeek && offset != self->relativePosition)
{
return;
}
[self openForSeek:YES];
}
@ -260,6 +432,23 @@
return 0;
}
if (prefixBytes != nil)
{
int count = MIN(size, (int)prefixBytes.length - prefixBytesRead);
[prefixBytes getBytes:buffer length:count];
prefixBytesRead += count;
if (prefixBytesRead >= prefixBytes.length)
{
prefixBytes = nil;
}
return count;
}
int read = (int)CFReadStreamRead(stream, buffer, size);
if (read < 0)
@ -290,7 +479,9 @@
{
return;
}
self->supportsSeek = NO;
self->currentUrl = url;
if (url == nil)
@ -300,7 +491,7 @@
CFHTTPMessageRef message = CFHTTPMessageCreateRequest(NULL, (CFStringRef)@"GET", (__bridge CFURLRef)self->currentUrl, kCFHTTPVersion1_1);
if (seekStart > 0)
if (seekStart > 0 && supportsSeek)
{
CFHTTPMessageSetHeaderFieldValue(message, CFSTR("Range"), (__bridge CFStringRef)[NSString stringWithFormat:@"bytes=%lld-", seekStart]);
@ -312,6 +503,9 @@
NSString* value = [self->requestHeaders objectForKey:key];
CFHTTPMessageSetHeaderFieldValue(message, (__bridge CFStringRef)key, (__bridge CFStringRef)value);
}
CFHTTPMessageSetHeaderFieldValue(message, (__bridge CFStringRef)@"Accept", (__bridge CFStringRef)@"*/*");
CFHTTPMessageSetHeaderFieldValue(message, (__bridge CFStringRef)@"Ice-MetaData", (__bridge CFStringRef)@"0");
stream = CFReadStreamCreateForHTTPRequest(NULL, message);
@ -323,6 +517,8 @@
return;
}
CFReadStreamSetProperty(stream, (__bridge CFStringRef)NSStreamNetworkServiceTypeBackground, (__bridge CFStringRef)NSStreamNetworkServiceTypeBackground);
if (!CFReadStreamSetProperty(stream, kCFStreamPropertyHTTPShouldAutoredirect, kCFBooleanTrue))
{
@ -345,9 +541,6 @@
{
NSDictionary* sslSettings = [NSDictionary dictionaryWithObjectsAndKeys:
(NSString*)kCFStreamSocketSecurityLevelNegotiatedSSL, kCFStreamSSLLevel,
[NSNumber numberWithBool:YES], kCFStreamSSLAllowsExpiredCertificates,
[NSNumber numberWithBool:YES], kCFStreamSSLAllowsExpiredRoots,
[NSNumber numberWithBool:YES], kCFStreamSSLAllowsAnyRoot,
[NSNumber numberWithBool:NO], kCFStreamSSLValidatesCertificateChain,
[NSNull null], kCFStreamSSLPeerName,
nil];
@ -394,4 +587,9 @@
return [NSString stringWithFormat:@"HTTP data source with file length: %lld and position: %lld", self.length, self.position];
}
-(BOOL) supportsSeek
{
return self->supportsSeek;
}
@end