From a5cc1c2b42e947712d3c70583868d5d60a13a0de Mon Sep 17 00:00:00 2001
From: Zankaria <zankaria.auxa@mailu.io>
Date: Fri, 4 Oct 2024 01:01:47 +0200
Subject: [PATCH] HttpDriver.php: backport from upstream

---
 inc/Data/Driver/HttpDriver.php | 131 +++++++++++++++++++++++++++++++++
 inc/context.php                |   6 +-
 2 files changed, 136 insertions(+), 1 deletion(-)
 create mode 100644 inc/Data/Driver/HttpDriver.php

diff --git a/inc/Data/Driver/HttpDriver.php b/inc/Data/Driver/HttpDriver.php
new file mode 100644
index 00000000..022fcbab
--- /dev/null
+++ b/inc/Data/Driver/HttpDriver.php
@@ -0,0 +1,131 @@
+<?php
+namespace Vichan\Data\Driver;
+
+defined('TINYBOARD') or exit;
+
+
+/**
+ * Honestly this is just a wrapper for cURL. Still useful to mock it and have an OOP API on PHP 7.
+ */
+class HttpDriver {
+	private mixed $inner;
+	private int $timeout;
+	private int $max_file_size;
+
+
+	private function resetTowards(string $url, int $timeout): void {
+		\curl_reset($this->inner);
+		\curl_setopt_array($this->inner, [
+			\CURLOPT_URL => $url,
+			\CURLOPT_TIMEOUT => $timeout,
+			\CURLOPT_USERAGENT => 'Tinyboard',
+			\CURLOPT_PROTOCOLS => \CURLPROTO_HTTP | \CURLPROTO_HTTPS,
+		]);
+	}
+
+	public function __construct(int $timeout, int $max_file_size) {
+		$this->inner = \curl_init();
+		$this->timeout = $timeout;
+		$this->max_file_size = $max_file_size;
+	}
+
+	public function __destruct() {
+		\curl_close($this->inner);
+	}
+
+	/**
+	 * Execute a GET request.
+	 *
+	 * @param string $endpoint Uri endpoint.
+	 * @param ?array $data Optional GET parameters.
+	 * @param int $timeout Optional request timeout in seconds. Use the default timeout if 0.
+	 * @return string Returns the body of the response.
+	 * @throws RuntimeException Throws on IO error.
+	 */
+	public function requestGet(string $endpoint, ?array $data, int $timeout = 0): string {
+		if (!empty($data)) {
+			$endpoint .= '?' . \http_build_query($data);
+		}
+		if ($timeout == 0) {
+			$timeout = $this->timeout;
+		}
+
+		$this->resetTowards($endpoint, $timeout);
+		\curl_setopt($this->inner, \CURLOPT_RETURNTRANSFER, true);
+		$ret = \curl_exec($this->inner);
+
+		if ($ret === false) {
+			throw new \RuntimeException(\curl_error($this->inner));
+		}
+		return $ret;
+	}
+
+	/**
+	 * Execute a POST request.
+	 *
+	 * @param string $endpoint Uri endpoint.
+	 * @param ?array $data Optional POST parameters.
+	 * @param int $timeout Optional request timeout in seconds. Use the default timeout if 0.
+	 * @return string Returns the body of the response.
+	 * @throws RuntimeException Throws on IO error.
+	 */
+	public function requestPost(string $endpoint, ?array $data, int $timeout = 0): string {
+		if ($timeout == 0) {
+			$timeout = $this->timeout;
+		}
+
+		$this->resetTowards($endpoint, $timeout);
+		\curl_setopt($this->inner, \CURLOPT_POST, true);
+		if (!empty($data)) {
+			\curl_setopt($this->inner, \CURLOPT_POSTFIELDS, \http_build_query($data));
+		}
+		\curl_setopt($this->inner, \CURLOPT_RETURNTRANSFER, true);
+		$ret = \curl_exec($this->inner);
+
+		if ($ret === false) {
+			throw new \RuntimeException(\curl_error($this->inner));
+		}
+		return $ret;
+	}
+
+	/**
+	 * Download the url's target with curl.
+	 *
+	 * @param string $url Url to the file to download.
+	 * @param ?array $data Optional GET parameters.
+	 * @param resource $fd File descriptor to save the content to.
+	 * @param int $timeout Optional request timeout in seconds. Use the default timeout if 0.
+	 * @return bool Returns true on success, false if the file was too large.
+	 * @throws RuntimeException Throws on IO error.
+	 */
+	public function requestGetInto(string $endpoint, ?array $data, mixed $fd, int $timeout = 0): bool {
+		if (!empty($data)) {
+			$endpoint .= '?' . \http_build_query($data);
+		}
+		if ($timeout == 0) {
+			$timeout = $this->timeout;
+		}
+
+		$this->resetTowards($endpoint, $timeout);
+		// Adapted from: https://stackoverflow.com/a/17642638
+		$opt = (\PHP_MAJOR_VERSION >= 8 && \PHP_MINOR_VERSION >= 2) ? \CURLOPT_XFERINFOFUNCTION : \CURLOPT_PROGRESSFUNCTION;
+		\curl_setopt_array($this->inner, [
+			\CURLOPT_NOPROGRESS => false,
+			$opt => fn($res, $next_dl, $dl, $next_up, $up) => (int)($dl <= $this->max_file_size),
+			\CURLOPT_FAILONERROR => true,
+			\CURLOPT_FOLLOWLOCATION => false,
+			\CURLOPT_FILE => $fd,
+			\CURLOPT_IPRESOLVE => CURL_IPRESOLVE_V4,
+		]);
+		$ret = \curl_exec($this->inner);
+
+		if ($ret === false) {
+			if (\curl_errno($this->inner) === CURLE_ABORTED_BY_CALLBACK) {
+				return false;
+			}
+
+			throw new \RuntimeException(\curl_error($this->inner));
+		}
+		return true;
+	}
+}
diff --git a/inc/context.php b/inc/context.php
index 11a153ec..9a0a378d 100644
--- a/inc/context.php
+++ b/inc/context.php
@@ -2,7 +2,7 @@
 namespace Vichan;
 
 use Vichan\Data\{IpNoteQueries, ReportQueries, UserPostQueries};
-use Vichan\Data\Driver\{CacheDriver, ErrorLogLogDriver, FileLogDriver, LogDriver, StderrLogDriver, SyslogLogDriver};
+use Vichan\Data\Driver\{CacheDriver, HttpDriver, ErrorLogLogDriver, FileLogDriver, LogDriver, StderrLogDriver, SyslogLogDriver};
 
 defined('TINYBOARD') or exit;
 
@@ -63,6 +63,10 @@ function build_context(array $config): Context {
 			// Use the global for backwards compatibility.
 			return \cache::getCache();
 		},
+		HttpDriver::class => function($c) {
+			$config = $c->get('config');
+			return new HttpDriver($config['upload_by_url_timeout'], $config['max_filesize']);
+		},
 		\PDO::class => function($c) {
 			global $pdo;
 			// Ensure the PDO is initialized.