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phpx/server: improve wire format

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This commit updates the wire format of the phpx server. Instead of being
string-based, messages sent back and forth between go and php are now
base64-encoded DEFLATEd strings. This makes them a lot smaller and
faster to send.
This commit is contained in:
Tom 2023-05-01 15:50:21 +02:00
parent ffd9d2e695
commit a9572e6613
4 changed files with 80 additions and 38 deletions
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22
internal/phpx/server.php
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@ -8,6 +8,13 @@
// It should only contain comments at the beginning of each line, and only starting with '//'.
// See server.go.
// This file runs an infinite REPL-like loop.
// It continously reads from standard input, decodes code to pass to eval(), and send the result back.
//
// Commands are read in DEFLATE base64 encoding (to prevent having to send too much over the wire).
// Results are written to STDOUT back in base64 DEFLATE encoding.
// The results are of the form [$result,$error] - $result being the actual object returned, and $error an error string.
// define a json_encode alias, this saves a single character!
// (we also reuse it in the error string)
$E = 'json_encode';
@ -19,15 +26,11 @@ while(1) {
// stop outputting errors when executing
ob_start(null,0,PHP_OUTPUT_HANDLER_CLEANABLE);
// read the next line to get an end-of-line marker
$m = fgets(STDIN) or exit(0);
// read the next line (which will be code to execute)
$b = fgets(STDIN) or exit(0);
// accumulate the buffer until the marker is reached
// bail out if there is an unexpected end of input
for($b = $l = ""; $l !== $m;) {
$b .= $l;
$l = fgets(STDIN) or exit(1);
}
// read the next command to parse
$b = gzinflate(base64_decode($b));
// execute the code, and json_encode it
try {
@ -43,5 +46,8 @@ while(1) {
// and write out the result
ob_end_clean();
// deflate and base64_encode
$j = base64_encode(gzdeflate($j));
fwrite(STDOUT,"$j\n");
}