Skip to content

Instantly share code, notes, and snippets.

@rdlowrey
rdlowrey / uri-dot-segment-removal.php
Last active July 14, 2023 12:51
Remove dot segments from a URI path according to RFC3986 Section 5.2.4
<?php
/**
* Remove dot segments from a URI path according to RFC3986 Section 5.2.4
*
* @param $path
* @return string
* @link http://www.ietf.org/rfc/rfc3986.txt
*/
function removeDotPathSegments($path) {
@rdlowrey
rdlowrey / bench.js
Last active December 3, 2022 15:07
PHP vs Node.js scraping
/*
$ npm install request
$ node bench.js
*/
var request = require('request');
var url = 'http://www.google.com';
var total_requests = 100;
var i;
@rdlowrey
rdlowrey / pgsql-async.php
Last active January 16, 2020 17:14
Example usage of new non-blocking pgsql behavior
<?php
// Connect asynchronously (new constant for bitwise arg 2: PGSQL_CONNECT_ASYNC)
if (!$db = pg_connect($conn_str, PGSQL_CONNECT_ASYNC)) {
echo "pg_connect() error\n";
} elseif (pg_connection_status($db) === PGSQL_CONNECTION_BAD) {
echo "pg_connect() error\n";
} elseif (!$stream = pg_socket($db)) {
echo "pg_socket() error\n";
}
@rdlowrey
rdlowrey / keybase.md
Created April 12, 2018 13:21
keybase.md

Keybase proof

I hereby claim:

  • I am rdlowrey on github.
  • I am rdlowrey (https://keybase.io/rdlowrey) on keybase.
  • I have a public key ASBeQKDHmLVbYmkyKlQ5gtlC1y41gcvv-rSB4tYjNJBqago

To claim this, I am signing this object:

Keybase proof

I hereby claim:

  • I am rdlowrey on github.
  • I am dlowrey (https://keybase.io/dlowrey) on keybase.
  • I have a public key whose fingerprint is BA24 A9CC 19EE 0EBA 2078 1F9F AEE1 B63D FC9D 0D88

To claim this, I am signing this object:

@rdlowrey
rdlowrey / libevent.md
Last active March 28, 2016 06:24
libevent aerys benchmarks

100k Requests -- 100 concurrent clients

ab -n 100000 -c 100 -k http://127.0.0.1:1337/

Server Software:        
Server Hostname:        127.0.0.1
Server Port:            1337

Document Path:          /
@rdlowrey
rdlowrey / secure-http.md
Last active December 23, 2015 09:59
Secure stream encryption with native PHP.

PHP disables SSL/TLS peer verification by default. While this design decision significantly simplifies encrypted HTTP retrieval, it also means your transfers are totally vulnerable to Man-in-the-Middle attacks. To fully secure our transfers we need to verify that the party at the other end of our transfer is actually who they say they are.

To accomplish this we need two things:

  1. A CA file (in .PEM format) so we can tell openssl which certificate authorities we trust
  2. A stream context that specifies this CA file and instructs openssl to verify the other party

We can easily obtain the same CA file (direct link to .pem file) used by the Mozilla Foundation (the exact one cURL uses, BTW). This file is usually updated a handful of times each year and it's important to keep your CA file up-to-date or you risk trusting certificate authorities that are known to be insecure/unsafe. This kind of thing doesn't happen often, but it's important to upd

@rdlowrey
rdlowrey / pthreads-shutdown-worker.php
Last active December 20, 2015 05:09
Handling fatal errors inside threads via register_shutdown_function
<?php
class Worker extends \Worker {
function run() {
// &$this ref required to avoid segfault
register_shutdown_function([&$this, 'onShutdown']);
}
private function onShutdown() {
@rdlowrey
rdlowrey / request-params.md
Created June 22, 2012 15:03
Name/Value Parameters in PHP's HTTP Request Modeling

Name/Value Parameters in PHP's HTTP Request Modeling

For many PHP devs, their first experience with HTTP request parameters comes in the form of the $_GET and $_POST superglobals. These globally accessible arrays are an easily digestable abstraction of the HTTP spec. Indeed, for basic applications operating only in the context of common browser user-agents, these eminently accessible parameter collections work well.

But there are some significant problems with $_GET and $_POST under the surface:

<?php
function myHttpHandler(Request $request, Response $response) {
// async function that returns a promise
// we use yield to wait for that promise to resolve then resume here
// if there's some kind of error it will be thrown into our generator
$session = yield loadSessionFromRequest($request);
if ($session->hasValue('isLoggedIn')) {
// pass the individual promises from generateHttpBody() through using `yield from`