EDIT: Brian Slesinsky just documented the protocol (by reverse-engineering the code): https://docs.google.com/document/d/1eG0YocsYYbNAtivkLtcaiEE5IOF5u4LUol8-LL0TIKU/edit First, GWT-RPC protocol is asymmetric so that it’s always optimized for the client-side: fast to deserialize something coming from the server, and fast to serialize something to send to it. It’s obviously not binary, as you suspected, but text-based. client-to-server protocol is pipe-delimited … Read more
This was answered by an official Swift developer (Slava_Pestov) on the Swift forums. Here is the summary: You should use AnyObject (protocol SomeProtocol: AnyObject). AnyObject and class are equivalent. There is no difference. class will eventually be deprecated.
Declaring the function as part of the protocol definition instructs the compiler to use dynamic dispatch when calling the function, as the compiler would expect types implementing the protocol to give an implementation for that function. This is called a method requirement. Now, if the type doesn’t define the method, then the runtime resolves the … Read more
You can do this neatly with cURL: <?php // create a new cURL resource $ch = curl_init(); // set URL and other appropriate options curl_setopt($ch, CURLOPT_URL, “http://www.example.com/”); // This changes the request method to HEAD curl_setopt($ch, CURLOPT_NOBODY, true); // grab URL and pass it to the browser curl_exec($ch); // Edit: Fetch the HTTP-code (cred: @GZipp) … Read more
I think the key to understanding what is going on here is distinguishing between things that are determined dynamically at runtime, and things that are determined statically at compile time. It doesn’t help that, in most languages like Java, protocols (or interfaces) are all about getting polymorphic behavior at run time, whereas in Swift, protocols … Read more
Short answer: No. Long answer: how would this work? Imagine you could add methods to existing protocols? How would this work? Imagine we wanted to add another method to NSCoding, say -(NSArray *) codingKeys; This method is a required method that returns an array of the keys used to encoding the object. The problem is … Read more
Apple states in the “Swift Programming Languages Documentation”: If the protocol only requires a property to be gettable, the requirement can be satisfied by any kind of property, and it is valid for the property to be also settable if this is useful for your own code. For this reason, the five following Playground code … Read more
One of the following should do it: Close the connection (reset or normal close) Write a malformed chunk (and close the connection) which will trigger client error Add a http trailer telling your client that something went wrong. Change your higher level protocol. Last piece of data you send is a hash or a length … Read more
You cannot forward declare a superclass or a protocol that it conforms to. In those cases, you must include the header. This is because (in the case of superclass) the superclass’s instance variables and methods become part of your class; or (in the case of protocols) the protocol’s methods become methods declared in your class, … Read more
If you wish to submit this data via a form, you don’t need to create the form with Javascript. Simply create an invisible form with HTML, populate the hidden field with Javascript, and automatically submit whenever you’re ready. <form method=”post” action=”process.php”> <input type=”hidden” name=”data” id=”data” /> </form> document.getElementById(“data”).value = “foo”; If you want to send … Read more