How to respond to *untyped* RPC ?

Start with the examples in client.php and server.php, then inspect user.tl and the tl-compiler invocation. Reproduce the untyped RPC build and request using the reported rpc_server_fetch_request and rpc_tl_query calls, including schema.tlo placement. Done means a concise working example and clear instructions for schema generation and path configuration.

Could someone please provide an ultra-short example of how to respond to an UNTYPED RPC request ?

The documentation only appears to show how to do TYPED RPC ?

Let's say I have a service that takes in a string in 'fullname' member (of the associative array) and I want the service to respond with an int (the age), exactly how would the index.php look ?

This is my user.tl

---types---
messages.ageResult age:int user_id:int fullname:string = messages.AgeResult;

---functions---
messages.getAge user_id:long nameparts:%(Vector string) fullname:string silent:bool = Vector %messages.AgeResult;

This is my client.php

<?php
$host = 'localhost';
$port = 9300;


// this will be mixed[]
$query = [
        '_'        => 'messages.getAge',  // function name
        'user_id'  => 123456,                        // long in TL  => int in PHP
        'nameparts' => ['Henrik', 'Skov'],              // Vector int in TL => int[] in PHP
        'fullname' => 'Henrik Skov',
        'silent'   => false,                         // bool in TL  => bool in PHP
];

$connection = new_rpc_connection($host, $port);
$query_id = rpc_tl_query_one($connection, $query);  // in

// Parse response
$response = rpc_tl_query_result_one($query_id);     // mixed[]
// check for errors
if (isset($response['__error'])) {
        // __error, __error_code
        var_dump($response);
}

// ['result'] is valid unless error
$result = $response['result'];   // mixed

var_dump($result);

Compiling with:

 kphp client.php -M cli -o ./client

Compiles OK.

server.php

<?php

if ($_SERVER['RPC_REQUEST_ID']) {
       // then it is a query for RPC server
       $request = rpc_server_fetch_request();

       var_dump($request);
       $func = $request->getTLFunctionName();
       var_dump($func);

       //$response = new \tl\RpcFunctionReturnResult();

       //rpc_server_store_response($response);
      
       // How do I make a response here ???

       exit;

} else {
       die('Unsupported query');
}

Compiling with:

kphp server.php -o ./server.php

DOES NOT compile ?

The error is:

Starting php to cpp transpiling...

Starting make...
objs cnt = 11
objs cnt = 11
Compiling stage started...
  0% [total jobs 12] [left jobs 12] [running jobs 0] [waiting jobs 4]
  8% [total jobs 12] [left jobs 11] [running jobs 7] [waiting jobs 4]
 16% [total jobs 12] [left jobs 10] [running jobs 6] [waiting jobs 4]
 25% [total jobs 12] [left jobs 9] [running jobs 5] [waiting jobs 3]
 33% [total jobs 12] [left jobs 8] [running jobs 5] [waiting jobs 3]
 41% [total jobs 12] [left jobs 7] [running jobs 4] [waiting jobs 2]
 50% [total jobs 12] [left jobs 6] [running jobs 4] [waiting jobs 1]
 58% [total jobs 12] [left jobs 5] [running jobs 4] [waiting jobs 1]
 66% [total jobs 12] [left jobs 4] [running jobs 3] [waiting jobs 1]
 75% [total jobs 12] [left jobs 3] [running jobs 2] [waiting jobs 1]
 83% [total jobs 12] [left jobs 2] [running jobs 1] [waiting jobs 1]
 91% [total jobs 12] [left jobs 1] [running jobs 0] [waiting jobs 0]
100% [total jobs 12] [left jobs 0] [running jobs 0] [waiting jobs 0]
Linking stage started...
/usr/bin/ld: /tmp/rpc/kphp_out/objs/o_82_8e806fd35b58aa13.o: in function `f$src_servere847339ec08c5d9()':
/tmp/rpc/kphp_out/kphp/o_82/src_servere847339ec08c5d9.cpp:18: undefined reference to `f$rpc_server_fetch_request()'
collect2: error: ld returned 1 exit status
pid [1346129] failed or terminated : return code 1
Failed [g++  -o /tmp/rpc/kphp_out/server -Wl,--whole-archive -Wl,--start-group /tmp/rpc/kphp_out/objs/_shape_keys.o /tmp/rpc/kphp_out/objs/globals_allocate.o /tmp/rpc/kphp_out/objs/globals_reset.o /tmp/rpc/kphp_out/objs/init_php_scripts.o /tmp/rpc/kphp_out/objs/_tagger.o /tmp/rpc/kphp_out/objs/main.o /tmp/rpc/kphp_out/objs/const_vars_init.o /tmp/rpc/kphp_out/objs/o_57_5497b566a8c8cf7f.o /tmp/rpc/kphp_out/objs/o_82_8e806fd35b58aa13.o /tmp/rpc/kphp_out/objs/o_const_init_d6cabf9fd688fd59.o /tmp/rpc/kphp_out/objs/o_globals_reset_a8c033df2aa83637.o /usr/share/vkontakte/kphp_source/objs/libkphp-full-runtime.a  -Wl,--end-group -Wl,--no-whole-archive -L/usr/share/vkontakte/kphp_source//objs/flex -ggdb -fno-lto -no-pie /opt/curl7600/lib/libcurl.a -L /usr/local/lib -L /usr/local/lib -l:libpcre.a -l:libre2.a -l:libyaml-cpp.a -l:libh3.a -l:libz.a -l:libzstd.a -l:libnghttp2.a -l:libkphp-timelib.a -l:libssl.a -l:libcrypto.a -l:libnuma.a -l:libvk-flex-data.a -lpthread -lm -ldl -lmysqlclient -lpq -lrt -rdynamic]
Make failed. Waiting for 0 children

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Compilation error at stage: Make, gen by make.cpp:571
  unknown file:0

Linking stage failure

Compilation terminated due to errors

Line 18 is this line:

$request = rpc_server_fetch_request();

Compiling the user.tl file with

sudo tl-compiler -v -e /var/www/vkontakte/data/www/vkontakte.com/tl/scheme.tlo /usr/share/vkontakte/examples/tl-files/common.tl /usr/share/vkontakte/examples/tl-files/tl.tl /usr/share/vkontakte/examples/tl-files/user.tl

gives this error:

Parse ok
No one read/write attribute found for messages.getAge
Fail

Running:

henrik@HSLAPTOP-ASUS:/tmp/rpc$ ./server --rpc-port 9300
[1360370][2024-08-30 15:31:14.781930 limits.cpp  124] failed to set rlimit for core dump size.

Running the client:

henrik@HSLAPTOP-ASUS:/tmp/rpc$ ./client
[1360388][2024-08-30 15:31:20.319415 limits.cpp  124] failed to set rlimit for core dump size.
[1725024680] [1360388] Warning: Storing error:
Function "messages.getAge" not found in tl-scheme
In _unknown_ serializing TL object
------- Stack Backtrace -------
(0) ./client : php_warning(char const*, ...)+0xa4 [0x666884]
(1) ./client : CurrentTlQuery::raise_storing_error(char const*, ...)+0x159 [0x6aa009]
(2) ./client : store_function(mixed const&)+0x32a [0x683d4a]
(3) ./client : rpc_tl_query_impl(class_instance<C$RpcConnection> const&, mixed const&, double, std::tuple<long>&, bool, bool, bool, unsigned long&, bool)+0x87 [0x686fe7]
(4) ./client : f$rpc_tl_query_one(class_instance<C$RpcConnection> const&, mixed const&, double)+0x34 [0x687244]
(5) ./client : f$src_client4f417b90a5796c06()+0x1ca [0x52190a]
(6) ./client : f$src_client4f417b90a5796c06$run()+0xd [0x52159d]
(7) ./client : PhpScript::run()+0xef [0x71e9cf]
(8) /lib/x86_64-linux-gnu/libc.so.6 : +0x5a130 [0x7f6323e60130]
-------------------------------

array(2) {
  ["__error"]=>
  string(14) "Wrong query_id"
  ["__error_code"]=>
  int(-1003)
}
NULL

What am I doing wrong ???

Where exactly should the schema.tlo file be placed ? On the server and/or the client ?
And how do I specify the path to it ???

Please help !