265 Topics
Our RSS feeds tend to get a decent amount of traffic. I would love to cache them, but that would break [PubSubHubbub](https://en.wikipedia.org/wiki/WebSub). In other words, PubSub would provide real-time notifications to subscribers of the RSS feed, but the RSS feed would not be updated in real-time when new content was …
I happily just discovered the Cache-Control rules *stale-if-error* and *stale-while-revalidate*. I came across [an article](https://developers.cloudflare.com/cache/concepts/cache-control/) on Cloudflare's site that says that those two directives are ignored if CF's Always Online feature is enabled, so I've gone ahead and disabled that. However, I'm confused by the following quote: > The stale-if-error …
I'm currently working on enhancing the user experience for the <snipped> app, and I've run into a bit of a roadblock. I'm trying to optimize the game lobby to ensure smooth navigation and quick loading times, especially as our user base continues to grow. However, I'm finding that even with …
Hi everyone, I am Emmanuel Katto. I'm building a high-traffic web application that requires fast and efficient data retrieval from a relational database. To improve performance, I'm considering implementing a caching layer using Redis. But, I'm not sure about the best approach to design and integrate the caching layer into …
When working with RecyclerView, always utilize the ViewHolder pattern to improve performance by minimizing the number of findViewById() calls. public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> { public static class ViewHolder extends RecyclerView.ViewHolder { TextView textView; public ViewHolder(View itemView) { super(itemView); textView = itemView.findViewById(R.id.textView); } } @Override public ViewHolder onCreateViewHolder(ViewGroup parent, int …
What scenarios are suitable for using Redis to store chat messages?
Everyone knows that PHP has such a bad rap for so much bad code being out there. I am a firm believer it is not a problem with PHP, itself, but rather the incredibly low barrier to entry (open source, readily available with nearly all web hosting packages, etc.) coupled …
Hello There, Do you have any experience how to run a dns cache ? I want to learn how to run a dns cache and log what my users are browsing onto a webpage. In other words, the Log File should turn into a webpage be it with .html or …
When I run `getStats()` on my PHP instance, it results in the following: array ( '10.143.27.235:11211' => array ( '����' => '', 'pid' => 3602, 'uptime' => 49804, 'time' => 1663088274, 'version' => '1.5.22', 'libevent' => '2.1.8-stable', 'pointer_size' => 64, 'rusage_user' => 30.254434, 'rusage_system' => 62.188442000000002, 'max_connections' => 4096, 'curr_connections' …
I'm trying to get Memcached persistent connections to work. We currently have a cluster of four Memcached servers each with 2GB of RAM, and four web servers. My code looks like this: public function __construct() { global $config; $this->cache = new Memcached('daniweb'); if ($this->cache->isPristine()) { $this->cache->setOptions(array( Memcached::OPT_NO_BLOCK => true, Memcached::OPT_BUFFER_WRITES …
I need to get a set of results from the db (server) but at times I would get the same result back and I would like to cache the result instead of making the same call to the db. Any ideas?
Starting September 1st, about 25% of crawl requests started returning 304 Not Modified instead of 200 OK. Prior to that, there were just a small handful of such requests per day. I did not make any code changes that would introduce returning this header. Once I noticed, however, I tried …
Hello, I have set image expiry in .htaccess file, but it's not working; might be because cloudflare.com hardly let it work. Most viable solution in such case is to declare in php header, but I don't know the process. Will you please help me out? Regards, Asish
This question specifically relates to PHP's Memcached library when specifying a server key and adding multiple keys at once. **Question one**: Is it true that PHP's setMultiByKey() doesn't take advantage of the memcached server's native support for setting multiple keys at once, but that the logic is on PHP's side …
Hi all, I have WordPress blog, problem is that when we upload new content and browse the blog the latest change won't appear on blog until unless explicitly refresh the page after opening a blog. Here is the blog URL: https://corevoila.in/ Any help or clue will be appreciated Thanks
Our CSS and JS files are not being re-downloaded by web browsers when we update them. The response headers look like this: cache-control: max-age=7776000 content-encoding: gzip content-type: text/css; charset=UTF-8 date: Sat, 01 Feb 2020 02:41:59 GMT etag: W/"5e34c19d-68a08" expires: Fri, 01 May 2020 02:41:59 GMT last-modified: Sat, 01 Feb 2020 …
<?php include 'ProcessDAO.php'; $dest=""; if(isset($_POST['login'])){ session_start(); // i get an error in this line !! $_SESSION['status']='online'; $_SESSION['breadcrumb']='home'; $pro = new ProcessDAO(); $dest = $pro->LogIn($_POST['username'],$_POST['password']); }else{ session_start(); $dest ="Location: ../index.php"; session_destroy(); } header($dest); ?> guyss can you help me out because in my Login.PHP file when i login i always get …
hI! I m trying to create a simple login application in jsp where i create a session allows the user to use certain features and then logout. Problem is that after the user logs out. I destroy all session objects and invalidate the session and redirect to welcome page still, …
Hello, I have a website that I built after editing it requires the user to clear browser cache to see the updated website. My question is does it requires everyone who have open the website for the first to clear browser cache to see the updated? What if the first …
Hello, i want to cache embedded urls -YouTube, Vimeo- photos and videos so that i could reduce bandwidth usage and server load for my website. How can i help my website to do that? I know that browsers cache information `https://en.wikipedia.org/wiki/Web_cache`. Is there something i can to do to make …
Hello everyone, I'm currently developing a webpage that when user input the data needed in Advance Filtering and click on the button'Search Result',the table will show the data needed,but the problem is i get the error of Uncaught TypeError: Cannot read property 'fnDraw' of undefined when the user choose the …
void change(char* input){ memset(input, 'a', strlen(input)); } int main(){ char* p = "foo"; cout << p << endl; change(p); cout << p << endl; }
Cache in local storage of browsers gets cleared when website page redirects from AliPay payment website. This is happening in some computers and working fine in some. From my website user selects AliPay payment method then user is redirected to payment website and on successful payment is being redirected back …
Dazah API uses Redis to handle rate limiting. The goal is to limit every each client_id/user_id pair from making over 5,000 requests every 5 minutes. We use Codeigniter 3.x and it looks something like this: $flood_control = $CI->cache->get("user_limit:{$token_obj->client_id}:{$token_obj->user_id}"); if ($flood_control === false) { $CI->cache->save("user_limit:{$token_obj->client_id}:{$token_obj->user_id}", 0, 300); } else if ($flood_control …
Hello, Recently I am dealing with bad performance in an php application that I have build, googling this issue I found out that using services like memcached you can archive a huge performance improvements. The weird thing comes when I try to find a very good and detailed example I …
I've noticed the last couple of weeks that a hard-refresh won't clear the cache anymore in Chrome... well to me and two clients of mine (we're all on a Mac by the way). Not sure either if there was an update to Chrome recently which might cause this now. Did …
I use a webservice to pull some data from it everyday & update it on my MySQL database. I'll make around 600 calls to this service. The webservice response is very slow (takes around 30 minutes to complete 600 transactions) & during this time, the MySQL is also giving slow …
I have a code that is going to pick the page title of the previous page and autopopulate a field in a form i have created. Users pick the job they want then upon clicking apply the go to an application form. There is a field that is being autopopulated …
Hi all, my understanding was that Nginx doesn't do any caching unless you tell it to. However, for some reason, all my filles are being cached, and so the website doesn't respond to change in css or js files etc. I thought that the below server{} code would help: location …
Although objects collections have a place in the PHP world many years now , their use is now flourishing because more and more PHP programmers turn to OOP. This tutorial is a sequel of https://www.daniweb.com/programming/web-development/tutorials/500118/a-simple-data-layer-for-oop-php-applications (we will refer to it as “previous tutorial”) and https://www.daniweb.com/programming/web-development/tutorials/500118/a-simple-data-layer-for-oop-php-applications , in order to understand …
You have some serious query/caching issues. Times vary but slow nonetheless. Finder -> My Bookmarks Page generated in 26.1996 seconds with 8 database queries and 7 memcached requests using 6.01MB of memory Latest Posts Page generated in 16.5247 seconds with 5 database queries and 6 memcached requests using 4.71MB of …
Hi All, I'm trying to set up an application cache for offline viewing. I'm using a custom built mvc framework. I'm having trouble getting anything to work regarding the application cache. It's as though the .appcache file isn't even being picked up. My set up is as follows: referencing the …
There is a problem with static variables and functions in how it is used by apps and frameworks in PHP , they are used as global functions or parameters while this is by far what they mean. It is easy to write the same functional or even procedural code in …
Hi All We are having an issue where a WSDL is loading another WSDL into it when we call it. This call takes a while on the first call which normally causes failures across the application during testing. One option we are looking into is pre-caching the WSDL in IIS …
I'm using PHPExcel to generate a spreadsheet to download. <?php $objPHPExcel = new PHPExcel(); $emailReport = 'tmp/company.xls'; // Remove previous file if it exists. $testdel=unlink($emailReport); if(!$testdel){ echo "Unable to remove previous Spreadsheet<hr/>"; } echo '<a href="'.$emailReport.'" class="dbutton">Download Spreadsheet</a><hr/>'; $objPHPExcel->getActiveSheet()->setCellValueByColumnAndRow(1, 1,'Old Value'); $objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel5'); $objWriter->save($emailReport); ?> All well and …
Hello, so I'm completely re-designing and updating files on the website, but the problem is, that everytime I change e.g. index.html file the website stays the same. I think that it has something to do with the browser's cache. It happens more often on Firefox, but I just hit ctrl+f5 …
Hello i have a problem with my website. It is running slow. I asked the my server provider why is that, and they replied its because the webiste uses many embedded urls like youtube, vimeo, dailymotion and so on. And so i have to cache these embedded urls. I tried …
How do i get cache for my website?
Hello i have a problem with my website. It is running slow. I asked the my server provider why is that, and they replied its because the webiste uses many embedded urls like youtube, vimeo, dailymotion and so on. And so i have to cache these embedded urls. Anyone knows …
Hi All, I am working with a Magento (v1.8.1) site, which until a week or so ago, was working perfectly. I am using the SM_AMAZ theme, and have no plugins which could interfeare with performance. Everything will be fine, then something in the admin panel will get changed, and the …
I have two GridView(SalesGView and ProdGView). SalesGView contains dropdowlist and textboxes.ProdGView is wrapped with ModalPopup and is populated by dropdownlist selection from ProdGView. The issue is when i click button select on ProdGView, the dropdownlist in the SalesGView resets to default value (Electronics) instead of selected value.  
Why this question arised?? I have used jquery Tabs in my application. On controller I have opened First tab with employee's names. Clicking on employee name opens another tab by just "add" facility of `$j("#teamtab").tabs("add",<data like ID>)` on opening multiple tabs , if I reload the page then it closes …
Need to set cache in browser using javascrip.If the internet is disconnected the web page is load by the same. Guide Me how will arrive this.
asp.net caching question: when using output caching, a location for the caching can be set - any, client, downstream, server, etc. is it possible to set a location when setting clientCache in web.config? i have set cacheControlCustom="public". i can't find a reference to any other options. could i use 'client …
Was updating tags, at some point I got to this: http://www.daniweb.com/tags/tables Is this a caching issue? It's showing "usability" and "excel". I do come across tags in the tagclouds, where the link goes to the "Oops" page (e.g. http://www.daniweb.com/tags/three). Am guessing it's because I removed that tag, but the cached …
I have come accross this website. http://en.colette.fr/women/just-in.html If you notice, the products are loaded with lightning speed. I understand they are using Magento. However, its still not clear how the products are loaded so fast. Can you guys give an idea what's hapening there. Is it the server or a …
I'm just wondering what the codeigniter caching library does and where it might be useful, or what problems people have encountered with it are.
I have the following code in my .htaccess file to leverage browser caching (and gzip), however when I run tools such as Google Page speed or Gtmetrix I still am getting the error tha my website is not using leverage browser caching. [Link to my website](www.ericbartolo.com) .htaccess code: <FilesMatch "\.(ico|jpg|jpeg|png|gif|js|css|swf|pdf|flv|mp3)$"> …
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