Check the URL Status Code & Download a PDF File in iOS

200 - Success

404 - Page Not Found

500 - Internel Server Error

.m File:

-(void)testing_function

{

    // Get the PDF Data from the url in a NSData Object

    NSMutableURLRequest* request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://www.example.com/info.pdf"] cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:5.0];

    [request setHTTPMethod:@"HEAD"];

    NSHTTPURLResponse* response = nil;

    NSError* error = nil;

    [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];

    NSLog(@"statusCode = %d", [response statusCode]);

    

    if ([response statusCode] == 200)

    {

        NSData *pdfData = [[NSData alloc] initWithContentsOfURL:[NSURL URLWithString:@"http://www.example.com/info.pdf"]];

        

        // Store the Data locally as PDF File

        NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

        NSString *documentsDirectory = [paths objectAtIndex:0];

        NSString *filePath = [documentsDirectory stringByAppendingPathComponent:@"Result.pdf"];

        [pdfData writeToFile:filePath atomically:YES];

        

        // Now create Request for the file that was saved in your documents folder

        NSURL *url = [NSURL fileURLWithPath:filePath];

        docController = [UIDocumentInteractionController alloc];

        docController = [UIDocumentInteractionController interactionControllerWithURL:url];

        BOOL isValid = [docController presentOpenInMenuFromRect:pdfIcon.frame inView:self.view animated:YES];

        docController.delegate = self;

        

        if(isValid)

        {

            docController.delegate = self;

        }

        else

        {

            UIAlertView* alert=[[UIAlertView alloc]initWithTitle:@"Sorry" message:@"You need iBooks to view this file" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"Install", nil];

            [alert show];

        }

    }

}