[ios] get file from web and save on the disk

get file from web and save on the disk.m

// src : file's url
// file : file's name on the disk
// return : file's path on the disk

- (NSString*)catchFileFrom:(NSString*)src toFile:(NSString*)file
{
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *filePath = [NSString stringWithFormat:@"%@/%@", [paths objectAtIndex:0],file];
    
    NSURL *url = [NSURL URLWithString:src];
    NSData *urlData = [NSData dataWithContentsOfURL:url];
    [urlData writeToFile:filePath atomically:YES];
    
    return filePath;
}

- (NSString*)catchFileFrom:(NSString*)src saveAtPath:(NSString*)path named:(NSString*)file
{
    NSLog(@" %@  >>   %@",file,src);
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *docsDir = [paths objectAtIndex:0];
    NSString *filePath;

    if(path == nil){
        filePath = [NSString stringWithFormat:@"%@/%@",docsDir,file];
    }else{
        NSFileManager *filemgr = [NSFileManager defaultManager];
        NSString *newDir = [docsDir stringByAppendingPathComponent:path];
        if ([filemgr createDirectoryAtPath:newDir withIntermediateDirectories:YES attributes:nil error: NULL]) {
            filePath = [NSString stringWithFormat:@"%@/%@",newDir,file];
        }else{
            return nil;
        }
    }
    
    NSURL *url = [NSURL URLWithString:src];
    NSData *urlData = [NSData dataWithContentsOfURL:url];
    [urlData writeToFile:filePath atomically:YES];
    
    return filePath;
}