Aloha,
I've come across a problem in iOS 6.1.3 reading webarchive files where -occasionally- the WebResourceData returns a null.
These are known good files (created in TextEdit) stored inside the bundle, and usually read fine. It's just that every so often, they don't.
In a simple test shown below, I read 3 different files over and over until I spot an error. For iOS 6.1.3, I hit an error between 1 and 200 iterations, every time I run the test. I've run this on various devices and the simulator with the same results.
// trying to find out why reading webarchives occasionally
// returns with empty WebResourceData from known good files.
//
- (BOOL) testMe {
NSMutableDictionary *plist = [[NSMutableDictionary alloc] initWithCapacity:100] ;
int iteration = 1;
BOOL ok = TRUE;
// keep going until we have an error
while (ok) {
NSArray *fileNames = @[@"file1",
@"file2",
@"file3" ];
// LOOP through the webArchives...
//
for (NSString *webarchiveName in fileNames) {
// get the webarchive template
//
NSURL *fileURL = [[NSBundle mainBundle] URLForResource:webarchiveName withExtension:@"webarchive"];
//
NSData *plistData = [NSData dataWithContentsOfURL:fileURL];
NSString *error;
NSPropertyListFormat format;
//
plist = (NSMutableDictionary *)[NSPropertyListSerialization propertyListFromData:plistData
mutabilityOption:NSPropertyListMutableContainersAndLeaves
format:&format
errorDescription:&error];
// check to see if it loaded
//
//
if(!plist){
NSLog(@"ERROR: did not load %@", webarchiveName);
}else{
NSData *foundWebResourceData = [[plist objectForKey:@"WebMainResource"] objectForKey:@"WebResourceData"];
NSString *foundHTML = [NSString stringWithUTF8String:[foundWebResourceData bytes]];
if (foundHTML == NULL) {
NSLog(@" %@ descr = %@", webarchiveName, foundHTML);
[errorOutlet setText:[NSString stringWithFormat:@"%@ returned with no content (null) in WebResourceData", webarchiveName]];
ok = FALSE;
}
} //---- end of if plist exists
} // loop through all 3 files
[countOutlet setText:[NSString stringWithFormat:@"%d", iteration]];
++ iteration;
} // keep looping until error
return ok;
} // end of testMe
The error shows up in these two lines:
NSData *foundWebResourceData = [[plist objectForKey:@"WebMainResource"] objectForKey:@"WebResourceData"];
NSString *foundHTML = [NSString stringWithUTF8String:[foundWebResourceData bytes]];
but it's not consistent. I've isolated the code by making a new xcode project where this is the only activity, other than displaying the iteration count and a retest button. The files always load, and always have a WebMainResource with a WebResourceData key.
A possible clue is that if I instead insert the code into ViewDidLoad, it runs for many more iterations but still finds a null. Calling [self testMe] from a button action hits an error much faster...not sure why.
I'm a bit at a loss, and hoping that it's not an iOS bug, but rather something basic I'm just missing. Any help would be appreciated.
