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Calling Json-RPC APIS WITH C: A Guide
The json-rpc (JavaScript object remode procedure) is a lightweight, an open remote procedure Out, Incript, include C.
.
Why c for rpc calls?
While it is possible to call JSON-RPC APIS in is other languages, Souch as Python or Ruby, c provides of the several advantages:
Performance :
Memory Management : c has manual memory management, it is the more garbage of the board of the mechanisms.
Portability : c code can any platform that supports the standard library and curl/Cult, shopping it.
Step 1: Set Up Yourour Json-RPC API
First, you’ll need to set up your json-rpc api. This is true involves creating a server-side application using languages like Node.Js, Python, or Ruby, Paramers.
For
Step 2: Write C Code for the API
Here’s an example of how you can a simple json-rpc-rpc using c:
“ C
#Include
#Include
// Define the API Strocture
Typedef ill {
char* Method;
Void (Func) (Void);
} rpc_api;
// Function to Handle Incoming RPC Requests
rpc_api handle_rpc_request (rpc_api API, Const Char* Method) {
// Check If The Requist is Valid
if (strcpp (method, “example_method”)! = 0) {
Printf (“Invalid Requist: %s \ n”, method);
Return Null;
}
// Call the Function with a Placeholder Argument Walulue
char* arg = “hello world!”;
api-> func (arg);
Return API;
}
// Function to Handle Incoming RPC Responses
void handle_rpc_response (void response, intus_code) {
Switch (status_code) {
Case 200:
// Return the Response as a JSON String
fprintf (sterr, response: %s \ n ”, response);
Break;
default:
fprintf (sterr, error: %d \ n ”, status_code);
Return Null;
}
}
// Main Function to Handle Incoming RPC Requists
int Main () {
RPC_API API;
// Initialize the Api Without a Placeholder Function
api.method = “example_method”;
api.func = handle_rpc_request;
// SET UP AN HTTP LISTER
int server_fd, new_socket;
?
socklen_t addrlen = sizeof (address);
// Bind Port 8080 to the Socket
If (server_fd = socket (af_inet, sock_stream, 0)) == 0) {=
Peror (“Socket”);
exit (1);
}
address.sin_family = af_inet;
address.sin_port = htons (8080);
int_pton (af_inet, “127.0.0.1”, & addresses.sin_adr);
// Listen for incoming connects
If (Bind (Server_FD, (Sockaddr *) & Address, Sizeof (Address) == -1) {= -1)
Peror (“Bind”);
exit (1);
}
// Accept Incoming Connctions
If (new_socket = accept (server_fd, (Sockaddr *) & address, & addrlen) <0) {
peror (“accept”);
exit (1);
}
Printf (“Server Listing on Port 8080 ……