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Merge pull request #16 from eapl-gemugami/feat/implement-refresh-if-modified-since

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feat(refresh): implement if-modified-since detection to only refresh newer content
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sørenpeter 2024-12-03 13:07:42 +01:00 committed by GitHub
commit 22661baee0
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1 changed files with 59 additions and 26 deletions
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77
libs/twtxt.php
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@ -1,4 +1,5 @@
<?php
declare(strict_types=1);
$config = parse_ini_file('private/config.ini');
@ -70,7 +71,7 @@ function getSingleParameter($keyToFind, $string) {
}
$pattern = '/\s*(?<!\S)' . $keyToFind . '\s*=\s*([^#\n]+)/';
// Fix: not machting with nick as in: `# follow = dbucklin@www.davebucklin.com https://www.davebucklin.com/twtxt.txt?nick=dbucklin`
// Fix: not machting with nick as in: `# follow = dbucklin@www.davebucklin.com https://www.davebucklin.com/twtxt.txt?nick=dbucklin`
//$pattern = '/\s*' . $keyToFind . '\s*=\s*([^#\n]+)/';
//$pattern = '/\s*' . $keyToFind . '\s*=\s*([^\s#]+)/'; // Only matches the first word
preg_match($pattern, $string, $matches);
@ -165,7 +166,7 @@ function replaceMentionsFromTwt(string $twtString): string {
$pattern = '/@<([^ ]+)\s([^>]+)>/';
//$replacement = '<a href="/?url=$2">@$1</a>';
$replacement = '<a href="'.str_replace("/index.php", "", $_SERVER["SCRIPT_NAME"]).'/profile?url=$2">@$1</a>';
$replacement = '<a href="' . str_replace("/index.php", "", $_SERVER["SCRIPT_NAME"]) . '/profile?url=$2">@$1</a>';
$replacement .= '<a href="$2" class="webmention"></a>'; // Adds a hidden link direcly to the twtxt.txt of the mentioned target
#$twtString = '@<nick https://eapl.mx/twtxt.txt>';
#$pattern = '/@<([^ ]+) ([^>]+)>/';
@ -175,7 +176,7 @@ function replaceMentionsFromTwt(string $twtString): string {
// from https://github.com/hxii/picoblog/blob/master/picoblog.php
//$pattern = '/\@<([a-zA-Z0-9\.]+)\W+(https?:\/\/[^>]+)>/';
//return preg_replace($pattern,'<a href="$2">@$1</a>',$twtString);
//return preg_replace($pattern,'<a href="$2">@$1</a>',$twtString);
}
function replaceLinksFromTwt(string $twtString) {
@ -226,15 +227,15 @@ function replaceTagsFromTwt(string $twtString) {
function embedYoutubeFromTwt(string $twtString) {
// original regex source: https://gist.github.com/afeld/1254889#gistcomment-1253992
// original regex source: https://gist.github.com/afeld/1254889#gistcomment-1253992
$pattern = '/(?:youtube(?:-nocookie)?\.com\/(?:[^\/\n\s]+\/\S+\/|(?:v|e(?:mbed)?)\/|\S*?[?&]v=)|youtu\.be\/)([a-zA-Z0-9_-]{11})/mi';
if(preg_match_all($pattern, $twtString, $youtubeLinks)) {
if (preg_match_all($pattern, $twtString, $youtubeLinks)) {
$youtubeLinks = array_unique($youtubeLinks[1]); // Remove dublicate cause by raw URLs conceverter to links
foreach ($youtubeLinks as $videoID) {
$twtString .= '<iframe loading="lazy" src="https://www.youtube.com/embed/'.$videoID.'" class="embed-video" allow="encrypted-media" title="" allowfullscreen="allowfullscreen" frameborder="0"></iframe>';
$twtString .= '<iframe loading="lazy" src="https://www.youtube.com/embed/' . $videoID . '" class="embed-video" allow="encrypted-media" title="" allowfullscreen="allowfullscreen" frameborder="0"></iframe>';
}
}
@ -320,27 +321,59 @@ function getCachedFileContents($filePath) {
return null;
}
function updateCachedFile($filePath, $cacheDurationSecs = 15) {
function updateCachedFile($filePath) {
$cacheFilePath = getCachedFileName($filePath);
# TODO: Report down URLs and stop loading them after a few tries
// File doesn't exist in cache or has expired, so fetch and cache it
// TODO: Seems it's not working right!
$fileDoesntExist = !file_exists($cacheFilePath);
$fileIsOld = false;
if (!$fileDoesntExist) {
$fileIsOld = !((time() - filemtime($cacheFilePath)) < $cacheDurationSecs);
# Get the last modification time of the local file
$lastModifiedTime = file_exists($cacheFilePath) ? filemtime($cacheFilePath) : false;
$lastModifiedHeader = $lastModifiedTime ? gmdate('D, d M Y H:i:s', $lastModifiedTime) . ' GMT' : null;
# echo "lastModifiedHeader: $lastModifiedHeader<br>\n";
# Set up the HTTP context with the 'If-Modified-Since' header
$options = [
'http' => [
'method' => 'GET',
'header' => $lastModifiedHeader ? "If-Modified-Since: $lastModifiedHeader\r\n" : '',
]
];
$context = stream_context_create($options);
$response = @file_get_contents($filePath, false, $context);
# Check if HTTP headers are available, usually when the server is available
if (!isset($http_response_header)) {
# echo "Failed to fetch headers. No HTTP request was made.\n";
return;
}
if ($fileDoesntExist || $fileIsOld) {
#echo "Loading Cached file $cacheFilePath<br>\n";
$contents = @file_get_contents($filePath);
if ($http_response_header) {
# var_dump($http_response_header);
if ($contents === false) {
// File loaded with errors, skip saving it
return;
foreach ($http_response_header as $header) {
# Look for the Last-Modified header
if (preg_match('/^Last-Modified:\s*(.+)$/i', $header, $matches)) {
$dateString = $matches[1]; // Extracted date
# echo "Extracted Date: $dateString\n";
// Convert to Unix timestamp
$lastModifiedTimestamp = strtotime($dateString);
if ($lastModifiedTimestamp > $lastModifiedTime) {
# echo "Remote file is newer. Load it!<br>\n";
} else {
# echo "Not modified since last request. No update needed.<br>\n";
return;
}
}
}
}
file_put_contents($cacheFilePath, $contents);
# Save the content if it was successfully retrieved
if ($response !== false) {
file_put_contents($cacheFilePath, $response);
#echo "File updated successfully.\n";
}
}
@ -398,8 +431,8 @@ function getTwtsFromTwtxtString($url) {
// mosty for (re)feeds from Mastodon etc.
if (str_contains($twtxtData->nick, "@")) {
$str = $twtxtData->nick;
$str = ltrim($str,"@");
$twtxtData->nick = explode("@",$str)[0]; // take the first [0] from splitting the nick at "@"
$str = ltrim($str, "@");
$twtxtData->nick = explode("@", $str)[0]; // take the first [0] from splitting the nick at "@"
}
// Fallback for nick and url if not set in twtxt.txt