php - Using JavaScript for RPC (Remote Procedure Calls) - Stack Overflow

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Whats the best way to do a RPC (Remote Procedure Call) from a webpage or from JavaScript code? I want to keep it in JavaScript if possible so that I can do live updates to the webpage without having to do anything in PHP in case my server goes down I still want the JavaScript to handle page updates... possibly even sending a request to a python shell script running locally... Is this legal from JavaScript?

I prefer having remote machines handling the requests. I see a lot of talk about how XMLRPC or JSONRPC can do this however, I haven't seen any good examples. I guess Microsoft suggests using their XMLhttprequest however, I haven't seen anything that doesn't use their ActiveX call or require special code for Internet Explorer... I just want some simple way of passing a mand to some python/ruby/c++ code from a webpage.

Python Server Code (Waiting for a RPC Request):

import xmlrpclib
from SimpleXMLRPCServer import SimpleXMLRPCServer
def my_awesome_remote_function(str):
    return str + "awesome"
server = SimpleXMLRPCServer(("localhost", 8000))
print "Listening on port 8000..."
server.register_function(is_even, "is_even")
server.serve_forever()

EXAMPLE JavaScript Code:

var client = rpc.server("http://localhost:8000/");
var my_local_variable = client.my_awesome_remote_function(param);

Is there a good JSON/JavaScript example someone can point me to that sends a request to a server and gets some data back from that server?

Thanks!

Whats the best way to do a RPC (Remote Procedure Call) from a webpage or from JavaScript code? I want to keep it in JavaScript if possible so that I can do live updates to the webpage without having to do anything in PHP in case my server goes down I still want the JavaScript to handle page updates... possibly even sending a request to a python shell script running locally... Is this legal from JavaScript?

I prefer having remote machines handling the requests. I see a lot of talk about how XMLRPC or JSONRPC can do this however, I haven't seen any good examples. I guess Microsoft suggests using their XMLhttprequest however, I haven't seen anything that doesn't use their ActiveX call or require special code for Internet Explorer... I just want some simple way of passing a mand to some python/ruby/c++ code from a webpage.

Python Server Code (Waiting for a RPC Request):

import xmlrpclib
from SimpleXMLRPCServer import SimpleXMLRPCServer
def my_awesome_remote_function(str):
    return str + "awesome"
server = SimpleXMLRPCServer(("localhost", 8000))
print "Listening on port 8000..."
server.register_function(is_even, "is_even")
server.serve_forever()

EXAMPLE JavaScript Code:

var client = rpc.server("http://localhost:8000/");
var my_local_variable = client.my_awesome_remote_function(param);

Is there a good JSON/JavaScript example someone can point me to that sends a request to a server and gets some data back from that server?

Thanks!

• php
• javascript
• json
• xmlhttprequest
• rpc

Share Improve this question Follow edited Feb 4, 2018 at 6:22 Asher asked Apr 4, 2012 at 7:36 AsherAsher 2,77466 gold badges3434 silver badges4343 bronze badges 2

• I really would like to see a side by side benchmark of 100 JavaScript requests... one going to a PHP, Python, Ruby, Node.JS, Apache (CGI C++) program and see the time it takes to get all the replies back... it might help us learn more about the request model. I still haven't figured out how to get a full binary request going from javascript and pass that into a local object in ruby/python etc. – Asher Commented Nov 30, 2012 at 3:45
• Why is this tagged PHP if the server code is python and the client code is JavaScript? – Jonathan Commented Sep 1, 2019 at 18:50

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1 Answer 1

Sorted by: Reset to default 2

Hardly it will work this way: client.my_awesome_remote_function. There's no magic in js like __call in php. Also remote calls are done in js mostly asynchronously using idea of callback - function which is called after finishing of some task.

var client = rpc.server("http://localhost:8000/");
var my_local_variable;
client.rpc('my_awesome_remote_function', [param], function(result) {
    my_local_variable = result;
});

You can easily find tutorials about that calls. Just google "ajax tutorials". E.g.: http://www.w3schools./ajax/ajax_intro.asp (event though w3schools isn't the best site and have errors in some details, it is still good for beginners).

All ajax implementations use both modern both XMLHttpRequest and ActiveX control for older IE.

It is possible to run those requests synchronously, but is considered very bad from the point of user experience. Also, you'll need to deal with concept of callbacks anyway.

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