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added data caching ability an factored out a few functions 

svn path=/trunk/boinc/; revision=6420
This commit is contained in:
Janus B. Kristensen 2005-06-23 20:37:43 +00:00
parent 2b4b12b463
commit 59d57ef9c4
1 changed files with 38 additions and 6 deletions
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44
html/inc/cache.inc
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@ -73,11 +73,9 @@ function clean_cache($max_age, $dir) {
chdir($start_dir);
}
function start_cache($max_age, $params=""){
$path = get_path($params);
// check free disk space every once in a while
//
// check free disk space every once in a while
function cache_check_diskspace(){
if (!(rand() % CACHE_SIZE_CHECK_FREQ)) {
$too_old=86400;
while ((disk_free_space("../cache") < MIN_FREE_SPACE) ||
@ -86,9 +84,10 @@ function start_cache($max_age, $params=""){
$too_old/=2;
}
}
}
function cache_need_to_regenerate($path, $max_age){
$regenerate = false;
if ($max_age) {
$request = getallheaders();
clearstatcache();
@ -123,7 +122,29 @@ function start_cache($max_age, $params=""){
} else {
$regenerate = true;
}
return $regenerate;
}
// Returns cached data or false if nothing was found
function get_cached_data($max_age,$params=""){
$path = get_path($params);
cache_check_diskspace();
if ($max_age) {
$regenerate=cache_need_to_regenerate($path, $max_age);
if (!$regenerate){
return file_get_contents($path);
}
}
return false; //No data was cached, just return
}
function start_cache($max_age, $params=""){
$path = get_path($params);
cache_check_diskspace(); //Check free disk space once in a while
if ($max_age) {
$regenerate = cache_need_to_regenerate($path, $max_age); //Is the stored version too old, do we need to regenerate it?
if ($regenerate){
// If cached version is too old (or non-existent)
// generate the page and write to cache
@ -171,4 +192,15 @@ function end_cache($max_age,$params=""){
fclose($fhandle);
}
}
?>
function set_cache_data($data,$params=""){
// for the benefit of hackers
if (strstr($params, "..")) {
return;
}
$path = get_path($params);
//echo $path;
$fhandle=fopen($path, "w");
fwrite($fhandle, $data);
fclose($fhandle);
}?>