Understanding the JSON wire protocol

In many places, we have mentioned that WebDriver uses the JSON wire protocol to communicate between client libraries and different driver (that is, Chrome Driver, IE Driver, Gecko Driver, and so on) implementations. In this section, we will see exactly what it is and which different JSON APIs a client library should implement to talk to the drivers.

JavaScript Object Notation (JSON) is used to represent objects with complex data structures. It is used primarily to transfer data between a server and a client on the web. It has become an industry standard for various REST web services, offering a strong alternative to XML.

A sample JSON file, saved as a .json file, will look as follows:

{ 
   "firstname":"John",
   "lastname":"Doe",
   "address...