Prune unused utilities

php/utils/utils.php

@@ -35,114 +35,6 @@
 			: $str;
 	}
 
-	/**
-	 * Check whether URL is reachable, downgrading to HTTP if needed.
-	 * @param string $url URL to check.
-	 * @param int $retries [optional] Number of connection attempts.
-	 * @return bool Whether or not the server responded with a non-5XX HTTP code.
-	 */
-	function url_is_reachable(string $url, int $retries = 4): bool {
-		$retcode = curl_get_response_downgrade(
-			$url, retries: $retries,
-			curlopts: [CURLOPT_NOBODY => true], stop_on_codes: [404]
-		)[0];
-		return $retcode != 0 && floor($retcode / 100) != 5 ;
-	}
-
-
-	/**
-	 * Fetch URL repeatedly to obtain contents, downgrading to HTTP if needed.
-	 * @param string $url URL to fetch.
-	 * @param int $retries [optional] Number of connection attempts.
-	 * @param int[] $stop_on_codes [optional]
-	 * If one of these HTTP codes is encountered, fetching stops early.
-	 * @return array Fetched contents (if applicable),
-	 * and whether a downgrade to HTTP took place.
-	 * A code of 0 corresponds to an unreachable host.
-	 */
-	function curl_get_contents_downgrade(string $url, int $retries = 4, $stop_on_codes = [404]) {
-		list($retcode, $content, $downgrade) = curl_get_response_downgrade($url, $retries, $stop_on_codes);
-		return [$retcode == 200 ? $content : null, $downgrade];
-	}
-
-    /**
-	 * Fetch URL repeatedly to obtain URL contents.
-	 * @param string $url URL to fetch.
-	 * @param int $retries [optional] Number of connection attempts.
-	 * @param int[] $stop_on_codes [optional]
-	 * If one of these HTTP codes is encountered, fetching stops early.
-	 * @return ?string Fetched contents, if applicable.
-	 */
-	function curl_get_contents(string $url, int $retries = 4, $stop_on_codes = [404]): ?string {
-		return curl_get_response($url, retries: $retries, stop_on_codes: $stop_on_codes)[1];
-	}
-
-	/**
-	 * Fetch URL repeatedly, downgrading to HTTP if needed.
-	 * @param string $url URL to fetch.
-	 * @param int $retries [optional] Number of connection attempts.
-	 * @param int[] $stop_on_codes [optional]
-	 * If one of these HTTP codes is encountered, fetching stops early.
-	 * @param int[] $curlopts Associative array of options for `curl_setopt`.
-	 * @return array Return code, fetched contents (if applicable),
-	 * and whether a downgrade to HTTP took place.
-	 * A code of 0 corresponds to an unreachable host.
-	 */
-	function curl_get_response_downgrade(
-		string $url, $retries = 4, $stop_on_codes = [404], $curlopts = []
-	) {
-		$scheme = parse_url($url, PHP_URL_SCHEME);
-		if ($scheme == "https") {
-			list($retcode, $content) = curl_get_response($url, floor($retries / 2), $stop_on_codes, $curlopts);
-			if ($retcode == 200) return [$retcode, $content, false];
-			log_debug("Downgrading to HTTP");
-			list($retcode, $content) = curl_get_response(
-				substr_replace($url, "http:", 0, strlen("https:")),
-				ceil($retries / 2),
-				$stop_on_codes, $curlopts
-			);
-			return [$retcode, $content, true];
-		} else {
-			list($retcode, $content) = curl_get_response($url, $retries, $stop_on_codes, $curlopts);
-			return [$retcode, $content, false];
-		}
-	}
-
-	// Low default retries value so this doesn't run for 30 minutes
-	// FIXME: Does not seem to handle 308's, behaviour not transparent.
-	// TODO: Parallelize & use in CommunityServer::poll_reachable()
-	/**
-	 * Fetch URL repeatedly to obtain a valid response.
-	 * @param string $url URL to fetch.
-	 * @param int $retries Number of connection attempts.
-	 * @param string[] $stop_on_codes [optional]
-	 * If one of these HTTP codes is encountered, fetching stops early.
-	 * @param int[] $curlopts Associative array of options for `curl_setopt`.
-	 * @return array Return code and fetched contents, if applicable. A code of 0 corresponds
-	 * to an unreachable host.
-	 */
-	function curl_get_response(string $url, int $retries, $stop_on_codes = [404], $curlopts = []) {
-		global $CURL_RETRY_SLEEP;
-		// use separate timeouts to reliably get data from Chinese server with repeated tries
-
-		$contents = false;
-		$retcode = -1;
-
-		for ($counter = 1; $counter <= $retries; $counter++) {
-			$curl = make_curl_handle($url, $curlopts);
-			$contents = curl_exec($curl);
-			$retcode = curl_getinfo($curl, CURLINFO_HTTP_CODE);
-
-			curl_close($curl);
-
-			log_debug("Attempt #" . $counter . " for " . $url . " returned code " . $retcode . ".");
-			if ($contents != null || $retcode == 200 || in_array($retcode, $stop_on_codes)) break;
-			sleep($CURL_RETRY_SLEEP / 1E3);
-		}
-
-		return [$retcode, $retcode == 200 ? $contents : false];
-	}
-
 	function make_curl_handle(string $url, $curlopts = []) {
 		global $CURL_CONNECT_TIMEOUT_MS, $CURL_TIMEOUT_MS;