Sending string via ftp : getting error - iphone

Question

I'm trying to send a string via ftp using the code below but I'm getting an error:
{
//miscellaneous lines of code.....
//Convert contents of shopping cart into a property list
[Cart serializeCart];
//now need to transport the propertyList to the webserver
//first step is get the serialized propertylist from the documents folder
NSString *pathToSerializedCart = [rootPath stringByAppendingPathComponent:#"serializedCart.plist"];
NSString *shoppingCartString;
if (![fileManager fileExistsAtPath:pathToSerializedCart])
{
NSLog(#"ERROR:\nCouldnt find serialized cart in documents folder.");
}
else
{
NSData *serializedData = [NSData dataWithContentsOfFile:pathToSerializedCart];
shoppingCartString = [[NSString alloc] initWithData:serializedData encoding:NSUTF8StringEncoding];
}
NSLog(#"%#", shoppingCartString);
//Now that the cart is converted into a string. it is ready for transport
NSURL *url = [NSURL URLWithString:#"ftp://username:password#domainName.com/folder/serializedCart.xml"];
BOOL OK =[shoppingCartString writeToURL:url atomically:NO encoding:NSUTF8StringEncoding error:&error];
if(!OK) {
NSLog(#"Error writing to file %# , error = %#", url, [error localizedFailureReason]);
}
I'm getting the following console output for this code:
Error writing to file ftp://username:password#domainName.com/folder/serializedCart.xml , error = (null)
One of the variables: _domain in this error object in the last line when, I mouse over it during debugging says NSCocoaErrorDomain
I'm not sure how to debug this.
Could someone give any suggestions?

Answer 1

The writeToURL:.. methods don't support the FTP protocol. You'll have to use other mechanisms to write the string content onto an ftp server. You can look at tools such as ios-ftp-server to handle such uploads. You can also look at this sample code from Apple.