/* |
File: PutController.m |
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Contains: Manages the PUT tab. |
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Written by: DTS |
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Copyright: Copyright (c) 2009-2012 Apple Inc. All Rights Reserved. |
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Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Inc. |
("Apple") in consideration of your agreement to the following |
terms, and your use, installation, modification or |
redistribution of this Apple software constitutes acceptance of |
these terms. If you do not agree with these terms, please do |
not use, install, modify or redistribute this Apple software. |
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In consideration of your agreement to abide by the following |
terms, and subject to these terms, Apple grants you a personal, |
non-exclusive license, under Apple's copyrights in this |
original Apple software (the "Apple Software"), to use, |
reproduce, modify and redistribute the Apple Software, with or |
without modifications, in source and/or binary forms; provided |
that if you redistribute the Apple Software in its entirety and |
without modifications, you must retain this notice and the |
following text and disclaimers in all such redistributions of |
the Apple Software. Neither the name, trademarks, service marks |
or logos of Apple Inc. may be used to endorse or promote |
products derived from the Apple Software without specific prior |
written permission from Apple. Except as expressly stated in |
this notice, no other rights or licenses, express or implied, |
are granted by Apple herein, including but not limited to any |
patent rights that may be infringed by your derivative works or |
by other works in which the Apple Software may be incorporated. |
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The Apple Software is provided by Apple on an "AS IS" basis. |
APPLE MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING |
WITHOUT LIMITATION THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, |
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, REGARDING |
THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN |
COMBINATION WITH YOUR PRODUCTS. |
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IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, |
INCIDENTAL OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED |
TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) ARISING IN ANY WAY |
OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION |
OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY |
OF CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR |
OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE POSSIBILITY OF |
SUCH DAMAGE. |
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*/ |
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#import "PutController.h" |
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#import "NetworkManager.h" |
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#if TARGET_IPHONE_SIMULATOR |
static NSString * kDefaultPutURLText = @"http://localhost:9000/"; |
#else |
static NSString * kDefaultPutURLText = @""; |
#endif |
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@interface PutController () <UITextFieldDelegate> |
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@property (nonatomic, strong, readwrite) IBOutlet UITextField * urlText; |
@property (nonatomic, strong, readwrite) IBOutlet UILabel * statusLabel; |
@property (nonatomic, strong, readwrite) IBOutlet UIActivityIndicatorView * activityIndicator; |
@property (nonatomic, strong, readwrite) IBOutlet UIBarButtonItem * cancelButton; |
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- (IBAction)sendAction:(UIView *)sender; |
- (IBAction)cancelAction:(id)sender; |
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// Properties that don't need to be seen by the outside world. |
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@property (nonatomic, assign, readonly ) BOOL isSending; |
@property (nonatomic, strong, readwrite) NSURLConnection * connection; |
@property (nonatomic, strong, readwrite) NSInputStream * fileStream; |
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@end |
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@implementation PutController |
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@synthesize connection = _connection; |
@synthesize fileStream = _fileStream; |
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@synthesize urlText = _urlText; |
@synthesize statusLabel = _statusLabel; |
@synthesize activityIndicator = _activityIndicator; |
@synthesize cancelButton = _cancelButton; |
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#pragma mark * Status management |
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// These methods are used by the core transfer code to update the UI. |
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- (void)sendDidStart |
{ |
self.statusLabel.text = @"Sending"; |
self.cancelButton.enabled = YES; |
[self.activityIndicator startAnimating]; |
[[NetworkManager sharedInstance] didStartNetworkOperation]; |
} |
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- (void)sendDidStopWithStatus:(NSString *)statusString |
{ |
if (statusString == nil) { |
statusString = @"PUT succeeded"; |
} |
self.statusLabel.text = statusString; |
self.cancelButton.enabled = NO; |
[self.activityIndicator stopAnimating]; |
[[NetworkManager sharedInstance] didStopNetworkOperation]; |
} |
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#pragma mark * Core transfer code |
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// This is the code that actually does the networking. |
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- (BOOL)isSending |
{ |
return (self.connection != nil); |
} |
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- (void)startSend:(NSString *)filePath |
{ |
BOOL success; |
NSURL * url; |
NSMutableURLRequest * request; |
NSNumber * contentLength; |
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assert(filePath != nil); |
assert([[NSFileManager defaultManager] fileExistsAtPath:filePath]); |
assert( [filePath.pathExtension isEqual:@"png"] || [filePath.pathExtension isEqual:@"jpg"] ); |
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assert(self.connection == nil); // don't tap send twice in a row! |
assert(self.fileStream == nil); // ditto |
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// First get and check the URL. |
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url = [[NetworkManager sharedInstance] smartURLForString:self.urlText.text]; |
success = (url != nil); |
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if (success) { |
// Add the last the file name to the end of the URL to form the final |
// URL that we're going to PUT to. |
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url = [url URLByAppendingPathComponent:[filePath lastPathComponent] isDirectory:NO]; |
success = (url != nil); |
} |
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// If the URL is bogus, let the user know. Otherwise kick off the connection. |
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if ( ! success) { |
self.statusLabel.text = @"Invalid URL"; |
} else { |
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// Open a stream for the file we're going to send. We do not open this stream; |
// NSURLConnection will do it for us. |
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self.fileStream = [NSInputStream inputStreamWithFileAtPath:filePath]; |
assert(self.fileStream != nil); |
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// Open a connection for the URL, configured to PUT the file. |
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request = [NSMutableURLRequest requestWithURL:url]; |
assert(request != nil); |
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[request setHTTPMethod:@"PUT"]; |
[request setHTTPBodyStream:self.fileStream]; |
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if ( [filePath.pathExtension isEqual:@"png"] ) { |
[request setValue:@"image/png" forHTTPHeaderField:@"Content-Type"]; |
} else if ( [filePath.pathExtension isEqual:@"jpg"] ) { |
[request setValue:@"image/jpeg" forHTTPHeaderField:@"Content-Type"]; |
} else if ( [filePath.pathExtension isEqual:@"gif"] ) { |
[request setValue:@"image/gif" forHTTPHeaderField:@"Content-Type"]; |
} else { |
assert(NO); |
} |
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contentLength = (NSNumber *) [[[NSFileManager defaultManager] attributesOfItemAtPath:filePath error:NULL] objectForKey:NSFileSize]; |
assert( [contentLength isKindOfClass:[NSNumber class]] ); |
[request setValue:[contentLength description] forHTTPHeaderField:@"Content-Length"]; |
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self.connection = [NSURLConnection connectionWithRequest:request delegate:self]; |
assert(self.connection != nil); |
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// Tell the UI we're sending. |
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[self sendDidStart]; |
} |
} |
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- (void)stopSendWithStatus:(NSString *)statusString |
{ |
if (self.connection != nil) { |
[self.connection cancel]; |
self.connection = nil; |
} |
if (self.fileStream != nil) { |
[self.fileStream close]; |
self.fileStream = nil; |
} |
[self sendDidStopWithStatus:statusString]; |
} |
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- (void)connection:(NSURLConnection *)theConnection didReceiveResponse:(NSURLResponse *)response |
// A delegate method called by the NSURLConnection when the request/response |
// exchange is complete. We look at the response to check that the HTTP |
// status code is 2xx. If it isn't, we fail right now. |
{ |
#pragma unused(theConnection) |
NSHTTPURLResponse * httpResponse; |
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assert(theConnection == self.connection); |
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httpResponse = (NSHTTPURLResponse *) response; |
assert( [httpResponse isKindOfClass:[NSHTTPURLResponse class]] ); |
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if ((httpResponse.statusCode / 100) != 2) { |
[self stopSendWithStatus:[NSString stringWithFormat:@"HTTP error %zd", (ssize_t) httpResponse.statusCode]]; |
} else { |
self.statusLabel.text = @"Response OK."; |
} |
} |
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- (void)connection:(NSURLConnection *)theConnection didReceiveData:(NSData *)data |
// A delegate method called by the NSURLConnection as data arrives. The |
// response data for a PUT is only for useful for debugging purposes, |
// so we just drop it on the floor. |
{ |
#pragma unused(theConnection) |
#pragma unused(data) |
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assert(theConnection == self.connection); |
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// do nothing |
} |
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- (void)connection:(NSURLConnection *)theConnection didFailWithError:(NSError *)error |
// A delegate method called by the NSURLConnection if the connection fails. |
// We shut down the connection and display the failure. Production quality code |
// would either display or log the actual error. |
{ |
#pragma unused(theConnection) |
#pragma unused(error) |
assert(theConnection == self.connection); |
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[self stopSendWithStatus:@"Connection failed"]; |
} |
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- (void)connectionDidFinishLoading:(NSURLConnection *)theConnection |
// A delegate method called by the NSURLConnection when the connection has been |
// done successfully. We shut down the connection with a nil status, which |
// causes the image to be displayed. |
{ |
#pragma unused(theConnection) |
assert(theConnection == self.connection); |
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[self stopSendWithStatus:nil]; |
} |
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#pragma mark * Actions |
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- (IBAction)sendAction:(UIView *)sender |
{ |
assert( [sender isKindOfClass:[UIView class]] ); |
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if ( ! self.isSending ) { |
NSString * filePath; |
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// User the tag on the UIButton to determine which image to send. |
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filePath = [[NetworkManager sharedInstance] pathForTestImage:sender.tag]; |
assert(filePath != nil); |
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[self startSend:filePath]; |
} |
} |
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- (IBAction)cancelAction:(id)sender |
{ |
#pragma unused(sender) |
[self stopSendWithStatus:@"Cancelled"]; |
} |
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- (void)textFieldDidEndEditing:(UITextField *)textField |
// A delegate method called by the URL text field when the editing is complete. |
// We save the current value of the field in our settings. |
{ |
#pragma unused(textField) |
NSString * newValue; |
NSString * oldValue; |
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assert(textField == self.urlText); |
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newValue = self.urlText.text; |
oldValue = [[NSUserDefaults standardUserDefaults] stringForKey:@"PutURLText"]; |
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// Save the URL text if there is no pre-existing setting and it's not our |
// default value, or if there is a pre-existing default and the new value |
// is different. |
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if ( ((oldValue == nil) && ! [newValue isEqual:kDefaultPutURLText] ) |
|| ((oldValue != nil) && ! [newValue isEqual:oldValue] ) ) { |
[[NSUserDefaults standardUserDefaults] setObject:newValue forKey:@"PutURLText"]; |
} |
} |
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- (BOOL)textFieldShouldReturn:(UITextField *)textField |
// A delegate method called by the URL text field when the user taps the Return |
// key. We just dismiss the keyboard. |
{ |
#pragma unused(textField) |
assert(textField == self.urlText); |
[self.urlText resignFirstResponder]; |
return NO; |
} |
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#pragma mark * View controller boilerplate |
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- (void)viewDidLoad |
{ |
NSString * currentURLText; |
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[super viewDidLoad]; |
assert(self.urlText != nil); |
assert(self.statusLabel != nil); |
assert(self.activityIndicator != nil); |
assert(self.cancelButton != nil); |
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// Set up the URL field to be the last value we saved (or the default value |
// if we have none). |
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currentURLText = [[NSUserDefaults standardUserDefaults] stringForKey:@"PutURLText"]; |
if (currentURLText == nil) { |
currentURLText = kDefaultPutURLText; |
} |
self.urlText.text = currentURLText; |
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self.activityIndicator.hidden = YES; |
self.statusLabel.text = @"Tap a picture to start the PUT"; |
self.cancelButton.enabled = NO; |
} |
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- (void)viewDidUnload |
{ |
[super viewDidUnload]; |
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self.urlText = nil; |
self.statusLabel = nil; |
self.activityIndicator = nil; |
self.cancelButton = nil; |
} |
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- (void)dealloc |
{ |
// Because NSURLConnection retains its delegate until the connection finishes, and |
// any time the connection finishes we call -stopSendWithStatus: to clean everything |
// up, we can't be deallocated with a connection in progress. |
assert(self->_connection == nil); |
} |
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@end |