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  • How to flush data in php and disconnect user but keep the script alive

    - by Rodrigo
    This is a trick question, while developing a php+ajax application i felt into some long queries, nothing wrong with them, but they could be done in background. I know that there's a way to just send a reply to user while throwing the real processing to another process by exec(), however it dosen't feels right for me, this might generate exploits and it's not pratical on making it compatible with virtual servers and cross platform. PHP offers the ob_* functions although they help on flushing the cache, but the user will keep connected until the script is running. I'm wondering if there's an alternate to exec to keep a script running after sending data to user and closing connection/thread with apache, or a less "dirty" way to have processing data sent to another script.

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  • I can't use Spring filters in servlet-context XML

    - by gotch4
    For some reason both Eclipse and Spring can't find the filter tag (there is even a red mark)... What's wrong? <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:p="http://www.springframework.org/schema/p" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd"> <bean class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor"></bean> <bean id="myDataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <property name="driverClassName" value="com.mysql.jdbc.Driver" /> <property name="url" value="jdbc:mysql://localhost/jacciseweb" /> <property name="username" value="root" /> <property name="password" value="siussi" /> </bean> <bean id="mySessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"> <property name="dataSource" ref="myDataSource" /> <property name="annotatedClasses"> <list> <value>it.jsoftware.jacciseweb.beans.Utente </value> <value>it.jsoftware.jacciseweb.beans.Ordine </value> </list> </property> <property name="hibernateProperties"> <props> <prop key="hibernate.dialect"> org.hibernate.dialect.MySQLDialect </prop> <prop key="hibernate.show_sql"> true </prop> <prop key="hibernate.hbm2ddl.auto"> update </prop> <prop key="hibernate.cache.provider_class">org.hibernate.cache.NoCacheProvider</prop> </props> </property> </bean> <filter> <filter-name>hibernateFilter</filter-name> <filter-class> org.springframework.orm.hibernate3.support.OpenSessionInViewFilter </filter-class> <init-param> <param-name>singleSession</param-name> <param-value>true</param-value> </init-param> <init-param> <param-name>sessionFactoryBeanName</param-name> <param-value>mySessionFactory</param-value> </init-param> </filter> <!-- <aop:config> --> <!-- <aop:pointcut id="productServiceMethods" --> <!-- expression="execution(* product.ProductService.*(..))" /> --> <!-- <aop:advisor advice-ref="txAdvice" pointcut-ref="productServiceMethods" /> --> <!-- </aop:config> --> <bean id="acciseHibernateDao" class="it.jsoftware.jacciseweb.model.JAcciseWebManagementDaoHibernate"> <property name="sessionFactory" ref="mySessionFactory" /> </bean> <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager"> <property name="sessionFactory" ref="mySessionFactory" /> </bean> <tx:annotation-driven /> <bean id="acciseService" class="it.jsoftware.jacciseweb.model.JAcciseWebManagementServiceImpl"> <property name="dao" ref="acciseHibernateDao" /> </bean> <context:component-scan base-package="it.jsoftware.jacciseweb.controllers"></context:component-scan> <mvc:annotation-driven /> <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" p:synchronizeOnSession="true" /> <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping" /> <mvc:resources mapping="/resources/**" location="/resources/" /> <!-- non serve, è annotato --> <!-- <bean name="/accise" class="it.jsoftware.jacciseweb.controllers.MainController"> </bean> --> </beans> in particular it says "filter" is invalid content

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  • How do I track images embedded in HTML?

    - by ycseattle
    Hi, I'd like to track the views/impressions of images on web pages, but still allow the images to be embedded in HTML, like in the "img src="http://mysite.com/upload/myimage.jpg"/" element. I know in Windows I can write a handler for ".jpg" so the URL will actually trigger a handling function instead of loading the images from disk. Is it possible to do that in python/django on Ubuntu server? Can web browser still cache the jpg files if it is not a straight file path? It looks to me that this is how google picasaweb handles the image file name. I'd like to get some ideas on how to implement that. Thanks! -Yi

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  • Detect IE setting: check for newer versions of stored pages "never"

    - by xx
    I understand there isn't a way to interrogate a users IE settings directly due to security reasons, but is there a way to derive this answer with some other mechanism? I would like to stop a user from using my site if the setting "Check for newer versions of stored pages" is set to "Never". Any suggestions? Is there a way I could test for this using javascript? An example of what I am trying to accomplish is this: While it is not possible to check IE settings to see if you are running a popup blocker, that is a way to "test" for a popup blocker via javascript. I am looking for something similiar but for the cache setting, not the popup blocker.

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  • Are there ways to improve NHibernate's performance regarding entity instantiation?

    - by denny_ch
    Hi folks, while profiling NHibernate with NHProf I noticed that a lot of time is spend for entity building or at least spend outside the query duration (database roundtrip). The project I'm currently working on prefetches some static data (which goes into the 2nd level cache) at application start. There are about 3000 rows in the result set (and maybe 30 columns) that is queried in 75 ms. The overall duration observed by NHProf is about 13 SECONDS! Is this typical beheviour? I know that NHibernate shouldn't be used for bulk operations, but I didn't thought that entity instantiation would be so expensive. Are there ways to improve performance in such situations or do I have to live with it? Thx, denny_ch

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  • GZIP .htaccess and php session problem

    - by Suresh
    Hi, I am trying to implement GZIP compression for my website. I copied the below code in my .htaccess file: ExpiresActive On ExpiresDefault A604800 Header append Cache-Control "public" <IfModule mod_deflate.c> <FilesMatch "\.(js|css)$"> SetOutputFilter DEFLATE </FilesMatch> </IfModule> what happens is when I type username and password the page reloads but still the login form is displayed but session is set. When I refresh the page using ctrl + R the login form goes and the username is displayed. what will be the problem. wwaiting for ur reply.

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  • jQuery-Ui Ajax Tabs bug?

    - by vsync
    I have a JSON that returns from the server which tabs to build, so I init them in my JS like this: $('#tabs').tabs( 'ajaxOptions', { timeout: 20000, error: function(xhr, status, index, anchor){ console.log( status, index, anchor ); } }) .tabs('add', item.CategoryLink, item.CategoryName); Thing is, when I click a tab, and before it is done loading I click another tab, the previous request is aborted and never called again when I click that first one again! this is very bad, because it obviously didn't fetch the request, so what gives? I tried bypassing this by setting: .tabs({ cache: false }) but this is a bad thing to do, because I don't want to have a request each time again... it should be cachced if response was sent. using jquery-ui 1.8.1

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  • Should I use Perl or PHP or something else for this project?

    - by Clinton
    I'm about to embark on a project that will need to: Process XML Heavy text parsing of non-xml documents Insertion of data from xml and non-xml documents into a relational DB. Present processed data to user from db using webpages. The website will be subject to short periods of very heavy loads to pages (300+ visitors a minute for several minutes), but most of the time will be idle (a dozen or so visitors a minute). The ability to cache or scale to load will be very nice. I have a very strong background in Java and web services, but I do not want to use Java for this project as I'd like to diversify my skill set. Which language would you recommend and what are some pros and cons that you might recognize from your own experiences?

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  • WCF Caching Solution - Need Advice

    - by Brandon
    The company I work for is looking to implement a caching solution. We have several WCF Web Services hosted and we need to cache certain values that can be persisted and fetched regardless of a client's session to a service. I am looking at the following technologies: Caching Application Block 4.1 WCF TCP Service using HttpRuntime Caching Memcached Win32 and Client Microsoft AppFabric Caching Beta 2 Our test server is a Windows Server 2003 with IIS6, but our production server is Windows Server 2008, so any of the above options would work (except for AppFabric Caching on our test server). Does anyone have any experience with any of these? This caching solution will not be used to store a lot of data, but it will need to be fetched from frequently and fast. Thanks in advance.

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  • NoSQL or Ehcache caching ?

    - by paddydub
    I'm building a Route Planner Webapp using Spring/Hibernate/Tomcat and a mysql database, I have a database containing read only data, such as Bus Stop Coordinates, Bus times which is never updated. I'm trying to make the app run faster, each time the application is run it will preform approx 1000 reads to the database to calculate a route. I have setup a Ehcache which greatly improves the read from database times. I'm now setting terracotta + Ehcache distributed caching to share the cache with multiple Tomcat JVMs. This seems a bit complicated. I've tried memcached but it was not performing as fast as ehcache. I'm wondering if a MongoDb or Redis would be better suited. I have no experience with nosql but I would appreciate if anyone has any ideas. What i need is quick access to the read only database.

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  • Loading and managing reference data in Rails

    - by jonnii
    Most of the apps I've worked on have had some kind of reference data stored in the database, for example categories, zipcodes, area codes etc... this is information that's going to change very infrequently. Most of the time you want to load some kind of display name, and that's it. Currently this isn't causing me too many headaches, it's easy to :include the models I need when doing my queries, but going forward it causes a lot of query noise. Ideally I'd like to load the reference data when the app starts and when referencing it in queries it'll load from the cache instead of going to the database. What's the best way to manage this?

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  • Zend Framework - Database Table Singleton

    - by Sonny
    I have found myself doing this in my code to 'cache' the work done when instantiating my Zend_Db_Table models: if (Zend_Registry::isRegistered('x_table')) { $x_table = Zend_Registry::get('x_table'); } else { $x_table = new Default_Model_DbTable_X; Zend_Registry::set('x_table', $x_table); } It bothered me that this method isn't very DRY and it dawned on me today that a singleton pattern would probably be a better way to do this. Problem is, I've never written a singleton class. When I did some web searches, I found some offhand comments about Zend_Db_Table singletons, but no real examples. I already have meta-data caching configured. How do I make my Zend_Db_Table models singletons? Are there pitfalls or downsides?

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  • How can I synchronize database access between a write-thread and a read-thread?

    - by Runcible
    My program has two threads: Main execution thread that handles user input and queues up database writes A utility thread that wakes up every second and flushes the writes to the database Inside the main thread, I occasionally need to make reads on the database. When this happens, performance is not important, but correctness is. (In a perfect world, I would be reading from a cache, not making a round-trip to the database - but let's put that aside for the sake of discussion.) How do I make sure that the main thread sees a correct / quiescent database? A standard mutex won't work, since I run the risk of having the main thread grab the mutex before the data gets flushed to the database. This would be a big race condition. What I really want is some sort of mutex that lets the main thread of execution proceed only AFTER the mutex has been grabbed and released once. Does such a thing exist? What's the best way to solve this problem?

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  • Rename PHP Downloaded File in File Downloader/Accelerator Applications

    - by Joe
    I have the following "download" script in PHP which basically makes an address on my website download the file for the user, eg. mysite.com/download.php?fileid=10 The question I have is, how can I send the file name to the used for the download when a user downloads the .php address with a File Downloaders/Accelerators? eg. "Content-Disposition" in this case makes the file called download.php where as I want it to be renamed to $downloadFileName as usual. // Set headers header("Cache-Control: must-revalidate, post-check=0, pre-check=0"); header("Content-Description: File Transfer"); header("Content-Type: application/force-download"); header("Content-Disposition: attachment; filename=\"".$downloadFileName."\""); header("Content-Transfer-Encoding: binary"); // Read the file from disk readfile($downloadLocation);

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  • How can I consolidate deferred/delayed calls in Objective-C ?

    - by thrusty
    I'd like to ensure that certain maintenance tasks are executed "eventually". For example, after I detect that some resources might no longer be used in a cache, I might call: [self performSelector:@selector(cleanupCache) withObject:nil afterDelay:0.5]; However, there might be numerous places where I detect this, and I don't want to be calling cleanupCache continuously. I'd like to consolidate multiple calls to cleanupCache so that we only periodically get ONE call to cleanupCache. Here's what I've come up with do to this-- is this the best way? [NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(cleanupCache) object:nil]; [self performSelector:@selector(cleanupCache) withObject:nil afterDelay:0.5];

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  • JQuery response is null but actual response is not

    - by Paul Petrick
    I'm using JQuery to make an Ajax call. I used a sniffer to catch the response text: {"error_code":0,"message":"SUCCESS","data":{"session_token":"3efd9dde-a839-4e91-9415-4c2f6cba5b7b"}} But the response returned on the success callback is null. Anyone got any ideas? (see jquery code below. Jquery code: $.ajax({ type: "GET", url: "http://184.72.58.99/matchaapi/API/User/Login", data: { email: emailval, password: pwordval, developer_key: devkey }, dataType: "json", cache: false, beforeSend: function(xhr) { xhr.setRequestHeader( "Content-Type", "application/json; charset=utf-8" ); }, success: function(resp) { alert(resp); $("#status p").html(resp.message); }});

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  • Caching instances in a jee web app

    - by SibzTer
    Hi, Consider the scenario of a typical webapp with JSFs on the front and ejb3, with Hibernate as JPA provider, talking to backend database such as mysql, etc. The main user actions are login and mostly CRUD operations (minus any D(elete) operations). And the App Server is GlassFish of course. Given this scenario, how and where all would one go about providing caching to improve performance? From what I have googled, I have seen that hibernate provides some sort of caching through different cache providers. Is there any sort of caching that can be provided for the jsf pages? How about session beans or entity beans on the ejb side of things? Also, I just read about memcached and was wondering if this was something to consider?

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  • jQuery on click event send POST request

    - by Peterim
    Trying to send POST request on click event using jQuery with no luck. Here is what I use: <script type="text/javascript"> $('#taxi_update').click( $.ajax({ 'type':'POST', 'data':'id=17446&chru=0', 'success':function() { ... }, 'error':function(){ ... }, 'url':'/url/', 'cache':false }) ); </script> <a href="#" id="taxi_update">update</a> Unfortunately it doesn't send any POST request. Any suggestions what could be wrong with this?

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  • Caching the repository index in m2eclipse

    - by Titi Wangsa bin Damhore
    everytime i start with a fresh new workspace, m2eclipse downloads nexus-maven-repository-index.gz from the maven central repository. this is good. but, some times, i just want to start a new workspace, and not wait for it to download, it tried copying the whole .metadata directory from an old workspace to the new one, but the list of maven artifacts are still empty. is there a way i can cache it? or at least download the file once, and the copy/extract/repackage it so that m2eclipse thinks it has already downloaded it and allows me to search for maven artifacts. or a short version of the question where and in what format is the "nexus-maven-repository-index.gz" file stored in the workspace?

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  • How do polymorphic inline caches work with mutable types?

    - by kingkilr
    A polymorphic inline cache works by caching the actual method by the type of the object, in order to avoid the expensive lookup procedures (usually a hashtable lookup). How does one handle the type comparison if the type objects are mutable (i.e. the method might be monkey patched into something different at run time). The one idea I've come up with would be a "class counter" that gets incremented each time a method is adjusted, however this seems like it would be exceptionally expensive in a heavily monkey patched environ since it would kill all the PICs for that class, even if the methods for them weren't altered. I'm sure there must be a good solution to this, as this issue is directly applicable to Javascript and AFAIK all 3 of the big JS VMs have PICs (wow acronym ahoy).

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  • Jquuery Tabs Cookiess

    - by user342391
    I am trying to use the Jquery cookie plugin to remember the last selected tab. I can't seem to get it to work.Do i need anything else apart from the jquery lib and cookie plugin??? This is the code: <script type="text/javascript"> $(document).ready(function() { $("#tabletabscampaigns > ul").tabs({ remote: true, cache: true }); $("#tabletabscampaigns").tabs({selected: 0, cookie: { expires: 30} }); }); </script> <div id="tabletabscampaigns" style="float:left; width:895px; margin-top:20px;">

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  • Hardware-specific questions

    - by overflow
    I'm good at programming yet I feel like I don't know enough about the architecture of the hardware I'm working on. What does the Northbridge on the mainboard do? What does the L2 cache of my processor do? Can Windows XP use multiple processors? Not in terms of concrete multitasking in all programs but using the capacity of all cores if needed instead of always only one core. How can my processor/mainboard interact with multiple kinds of graphics/sound cards?

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  • Combine and compress script files in asp.net mvc

    - by victor_foster
    I am working in Visual Studio 2008, IIS7 and using asp.net MVC. I would like to know the best way to combine all of my Javascript files into one file to reduce the number of HTTP requests to the server. I have seen many articles on this subject but I'm not sure which one I should look at first (many of them are over a year old). Here are the things I would like to do: Combine my Javascript and css files Safely compress my Javascript files when I publish, but keep them uncompressed while I am debugging Cache my Css and Javascript files but allow them to refreshed with a hard refresh when they are updated without having to rename them.

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  • Using 'Copy as cURL' from Chrome in windows command line

    - by user2029890
    So, Google Chrome as this great 'copy as cURL' option under 'Network' of the Chrome DevTools. Works great in command lines for linux but not in windows. Apparently it has something to do with the single quotes as the error I get is protocol 'http not supported In other words its reading that single quote. Is there a simple way to make this formatable for windows? I tried replacing all the single quotes with double quotes but then nothing happens at all. The command is: curl 'http://www.test.com/login/' -H 'Cookie: PHPSESSID=7dvb25maaaaaa9d7bbbbbc3f6' -H 'Origin: http://www.test.com' -H 'Accept-Encoding: gzip,deflate,sdch' -H 'Host: www.test.com' -H 'Accept-Language: en-US,en;q=0.8' -H 'User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.95 Safari/537.36' -H 'Content-Type: application/x-www-form-urlencoded' -H 'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,/;q=0.8' -H 'Cache-Control: max-age=0' -H 'Referer: http://www.test.com/login/' -H 'Connection: keep-alive' --data 'loc=&login=user%40test.com&password=password&submit1=Sign+In' --compressed Thank you

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  • Aggregating and Displaying Multiple Feeds

    - by Keith
    I want to pull feeds for multiple online services (e.g. Tumblr, Google Reader, Delicious) and aggregate them into a single feed to display on my site. I know of services like YQL or Yahoo! Pipes which will combine feeds, but sometimes those services are too slow. I was wondering what the best method would be if I wanted to run this on my own server (using JavaScript or PHP)? Ideally, I would cache the results to cut down on processing.

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