iOS 7 Programming Cookbook

11.8. Sending HTTP PUT Requests with NSURLConnection

Problem

You want to call a web service using the HTTP PUT method to place a resource into the web server, and perhaps pass parameters as part of the HTTP body or in the query string, to the web service.

Solution

Just as with the GET, POST, and DELETE methods, we can use the PUT method using NSURLConnection. We must explicitly set our URL’s method to PUT.

Discussion

Let’s write a simple app that can create an asynchronous connection and send a few parameters as a query string and a few parameters in the HTTP body to the aforementioned URL using the PUT method:

- (BOOL)            application:(UIApplication *)application
  didFinishLaunchingWithOptions:(NSDictionary *)launchOptions{

    NSString *urlAsString = <# Place the URL of the web server here #>;
    urlAsString = [urlAsString stringByAppendingString:@"?param1=First"];
    urlAsString = [urlAsString stringByAppendingString:@"&param2=Second"];

    NSURL *url = [NSURL URLWithString:urlAsString];

    NSMutableURLRequest *urlRequest =
        [NSMutableURLRequest requestWithURL:url];

    [urlRequest setTimeoutInterval:30.0f];
    [urlRequest setHTTPMethod:@"PUT"];

    NSString *body = @"bodyParam1=BodyValue1&bodyParam2=BodyValue2";
    [urlRequest setHTTPBody:[body dataUsingEncoding:NSUTF8StringEncoding]];

    NSOperationQueue *queue = [[NSOperationQueue alloc] init];

    [NSURLConnection
     sendAsynchronousRequest:urlRequest
     queue:queue
     completionHandler:^(NSURLResponse *response,
                         NSData *data,
                         NSError *error) {

         if ([data length] >0  && error ==