File not downloading from server

[troop231]

This code shows through the NSLog that it downloaded the file, but when I check the Documents directory of the app on the simulator, there is no file to be found, can someone explain to me what's wrong with this code?

Thanks in advance

- (void)viewDidLoad {
    [super viewDidLoad];
	self.title = @"Test";
	
    
    NSString *urlString = @"http://www.insertwebsitenamehere.com/test/intro.pdf";  
    NSLog(@"Downloading HTTP header from: %@", urlString);  
    NSURL *url = [NSURL URLWithString:urlString];  
    
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    

    NSString *cachedPath = [paths objectAtIndex:0]; 
    NSFileManager *fileManager = [NSFileManager defaultManager];  
    
    BOOL downloadFromServer = NO;  
    NSString *lastModifiedString = nil;  
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];  
    [request setHTTPMethod:@"HEAD"];  
    NSHTTPURLResponse *response;  
    [NSURLConnection sendSynchronousRequest:request returningResponse:&response error: NULL];  
    if ([response respondsToSelector:@selector(allHeaderFields)]) {  
        lastModifiedString = [[response allHeaderFields] objectForKey:@"Last-Modified"];  
    }  
    
    NSDate *lastModifiedServer = nil;  
    @try {  
        NSDateFormatter *df = [[NSDateFormatter alloc] init];  
        df.dateFormat = @"EEE',' dd MMM yyyy HH':'mm':'ss 'GMT'";  
        df.locale = [[[NSLocale alloc] initWithLocaleIdentifier:@"en_US"] autorelease];  
        df.timeZone = [NSTimeZone timeZoneWithAbbreviation:@"GMT"];  
        lastModifiedServer = [df dateFromString:lastModifiedString];  
        [df release];  
    }  
    @catch (NSException * e) {  
        NSLog(@"Error parsing last modified date: %@ - %@", lastModifiedString, [e description]);  
    }  
    NSLog(@"lastModifiedServer: %@", lastModifiedServer);  
    
    NSDate *lastModifiedLocal = nil;  
    if ([fileManager fileExistsAtPath:cachedPath]) {  
        NSError *error = nil;  
        NSDictionary *fileAttributes = [fileManager attributesOfItemAtPath:cachedPath error:&error];  
        if (error) {  
            NSLog(@"Error reading file attributes for: %@ - %@", cachedPath, [error localizedDescription]);  
        }  
        lastModifiedLocal = [fileAttributes fileModificationDate];  
        NSLog(@"lastModifiedLocal : %@", lastModifiedLocal);  
    }  
    
    // Download file from server if we don't have a local file  
    if (!lastModifiedLocal) {  
        downloadFromServer = YES;  
    }  
    // Download file from server if the server modified timestamp is later than the local modified timestamp  
    if ([lastModifiedLocal laterDate:lastModifiedServer] == lastModifiedServer) {  
        downloadFromServer = YES;  
    }  
    
    if (downloadFromServer) {  
        NSLog(@"Downloading new file from server");  
        NSData *data = [NSData dataWithContentsOfURL:url];  
        if (data) {  
            // Save the data  
            if ([data writeToFile:cachedPath atomically:YES]) {  
                NSLog(@"Downloaded file saved to: %@", cachedPath);  
            }  
            
            // Set the file modification date to the timestamp from the server  
            if (lastModifiedServer) {  
                NSDictionary *fileAttributes = [NSDictionary dictionaryWithObject:lastModifiedServer forKey:NSFileModificationDate];  
                NSError *error = nil;  
                if ([fileManager setAttributes:fileAttributes ofItemAtPath:cachedPath error:&error]) {  
                    NSLog(@"File modification date updated");  
                }  
                if (error) {  
                    NSLog(@"Error setting file attributes for: %@ - %@", cachedPath, [error localizedDescription]);  
                }  
            }  
        }  
    }  
}

[JamesCahall]

Originally Posted by troop231

This code shows through the NSLog that it downloaded the file, but when I check the Documents directory of the app on the simulator, there is no file to be found, can someone explain to me what's wrong with this code?

Thanks in advance

- (void)viewDidLoad {
    [super viewDidLoad];
	self.title = @"Test";
	
    
    NSString *urlString = @"http://www.insertwebsitenamehere.com/test/intro.pdf";  
    NSLog(@"Downloading HTTP header from: %@", urlString);  
    NSURL *url = [NSURL URLWithString:urlString];  
    
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    

    NSString *cachedPath = [paths objectAtIndex:0]; 
    NSFileManager *fileManager = [NSFileManager defaultManager];  
    
    BOOL downloadFromServer = NO;  
    NSString *lastModifiedString = nil;  
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];  
    [request setHTTPMethod:@"HEAD"];  
    NSHTTPURLResponse *response;  
    [NSURLConnection sendSynchronousRequest:request returningResponse:&response error: NULL];  
    if ([response respondsToSelector:@selector(allHeaderFields)]) {  
        lastModifiedString = [[response allHeaderFields] objectForKey:@"Last-Modified"];  
    }  
    
    NSDate *lastModifiedServer = nil;  
    @try {  
        NSDateFormatter *df = [[NSDateFormatter alloc] init];  
        df.dateFormat = @"EEE',' dd MMM yyyy HH':'mm':'ss 'GMT'";  
        df.locale = [[[NSLocale alloc] initWithLocaleIdentifier:@"en_US"] autorelease];  
        df.timeZone = [NSTimeZone timeZoneWithAbbreviation:@"GMT"];  
        lastModifiedServer = [df dateFromString:lastModifiedString];  
        [df release];  
    }  
    @catch (NSException * e) {  
        NSLog(@"Error parsing last modified date: %@ - %@", lastModifiedString, [e description]);  
    }  
    NSLog(@"lastModifiedServer: %@", lastModifiedServer);  
    
    NSDate *lastModifiedLocal = nil;  
    if ([fileManager fileExistsAtPath:cachedPath]) {  
        NSError *error = nil;  
        NSDictionary *fileAttributes = [fileManager attributesOfItemAtPath:cachedPath error:&error];  
        if (error) {  
            NSLog(@"Error reading file attributes for: %@ - %@", cachedPath, [error localizedDescription]);  
        }  
        lastModifiedLocal = [fileAttributes fileModificationDate];  
        NSLog(@"lastModifiedLocal : %@", lastModifiedLocal);  
    }  
    
    // Download file from server if we don't have a local file  
    if (!lastModifiedLocal) {  
        downloadFromServer = YES;  
    }  
    // Download file from server if the server modified timestamp is later than the local modified timestamp  
    if ([lastModifiedLocal laterDate:lastModifiedServer] == lastModifiedServer) {  
        downloadFromServer = YES;  
    }  
    
    if (downloadFromServer) {  
        NSLog(@"Downloading new file from server");  
        NSData *data = [NSData dataWithContentsOfURL:url];  
        if (data) {  
            // Save the data  
            if ([data writeToFile:cachedPath atomically:YES]) {  
                NSLog(@"Downloaded file saved to: %@", cachedPath);  
            }  
            
            // Set the file modification date to the timestamp from the server  
            if (lastModifiedServer) {  
                NSDictionary *fileAttributes = [NSDictionary dictionaryWithObject:lastModifiedServer forKey:NSFileModificationDate];  
                NSError *error = nil;  
                if ([fileManager setAttributes:fileAttributes ofItemAtPath:cachedPath error:&error]) {  
                    NSLog(@"File modification date updated");  
                }  
                if (error) {  
                    NSLog(@"Error setting file attributes for: %@ - %@", cachedPath, [error localizedDescription]);  
                }  
            }  
        }  
    }  
}

It appears your cached path is missing a filename like so:

cachedPath = [cachedPath stringByAppendingPathComponent:@"intro.pdf"];

James