An introduction to web cache proxy server

We have collection of more than 1 Million open source products ranging from Enterprise product to small libraries in all platforms. We aggregate information from all open source repositories. Search and find the best for your needs. Check out projects section.

An introduction to web cache proxy server - nuster

We aggregate and tag open source projects. We have collections of more than one million projects. Check out the projects section.

An introduction to web cache proxy server - nuster

Nuster is a simple yet powerful web caching proxy server based on HAProxy. It is 100% compatible with HAProxy, and takes full advantage of the ACL functionality of HAProxy to provide fine-grained caching policy based on the content of request, response or server status. This article gives an overview of nuster - web cache proxy server, its installation and few examples of how to use it.

Its features include:

All features of HAProxy are inherited, 100% compatible with HAProxy
Powerful dynamic cache ability
- Based on HTTP method, URI, path, query, header, cookies, etc
- Based on HTTP request or response contents, etc
- Based on environment variables, server state, etc
- Based on SSL version, SNI, etc
- Based on connection rate, number, byte, etc
Extremely fast
Cache purging
HTTPS supports on both frontend and backend
HTTP compression
HTTP rewriting and redirection

Installation

make TARGET=linux2628 USE_LUA=1 LUA_INC=/usr/include/lua5.3 USE_OPENSSL=1 USE_PCRE=1 USE_ZLIB=1
make install PREFIX=/usr/local/nuster/bin
TARGET: linux2628, linux26, linux24, linux24e, linux22, solaris, freebsd, openbsd, cygwin, custom, generic

Docker:

docker pull nuster/nuster
docker run -d -v /path/to/nuster.cfg:/etc/nuster/nuster.cfg:ro -p 8080:8080 nuster/nuster

Minimal config file:

Section description:

global: global parameters
defaults: default parameters for proxy section
frontend: parameter for frontend which accept requests from client
backend: forward requests to backend servers
listen: combine frontend and backend

global
    cache on
    daemon
    nbproc 2
defaults
    retries 3
    option redispatch
    option dontlognull
    timeout client 300s
    timeout connect 300s
    timeout server 300s
frontend web1
    bind *:8080
    mode http
    default_backend app1
backend app1
    balance roundrobin
    mode http
    filter cache
    cache-rule all ttl 0
    server s1 10.0.0.101:8080
    server s2 10.0.0.102:8080
    server s3 10.0.0.103:8080

Cache:

Set cache on in global

Set filter cache and cache-rule in backend

Start

/usr/local/nuster/bin/haproxy -f nuster.conf

Examples:

As a TCP Load Balancer:

frontend mysql-lb
   bind *:3306
   mode tcp
   default_backend mysql-cluster
backend mysql-cluster
   balance roundrobin
   mode tcp
   server s1 10.0.0.101:3306
   server s2 10.0.0.102:3306
   server s3 10.0.0.103:3306

As HTTP Load Balancer:

frontend web-lb
   bind *:80
   mode http
   default_backend apps
backend apps
   balance roundrobin
   mode http
   server s1 10.0.0.101:8080
   server s2 10.0.0.102:8080
   server s3 10.0.0.103:8080

As HTTPS Load Balancer:

frontend web
    bind *:8080 ssl crt XXX.pem
    # bind *:8080
    mode http
    default_backend app
backend app
    balance roundrobin
    filter cache off
    cache-rule all
    mode http
    #server a1 10.0.0.101:8002
    server a2 10.0.0.101:8003 ssl verify none

Web caching

frontend web1
    bind *:8080
    mode http
    use_backend app1a if { path /search }
    default_backend app1b
backend app1a
    balance roundrobin
    mode http
    option http-buffer-request
    filter cache
    cache-rule rpost ttl 60 if METH_POST
backend app1b
    #***

cache /a.jpg, no expire

cache-rule r1 ttl 0 if { path /a.jpg }

cache static files

acl static path_beg -i /static/ /images/ /css/
cache-rule static_files ttl 0 if static

cache /mypage, using sessionId cookie

acl pathB path /mypage
cache-rule r2 key method.scheme.host.path.delimiter.query.cookie_sessionId ttl 60 if pathB

cache /a.html if response header contains cache

http-request set-var(txn.pathC) path
acl pathC var(txn.pathC) -m str /a.html
acl resHdrCache1 res.hdr(cache) yes

cache-rule r3 if pathC resHdrCache1

cache /heavy for 100 seconds if there are more than 100 connections

acl heavypage path /heavy
acl tooFast be_conn ge 100
cache-rule heavy ttl 100 if heavypage tooFast

Add header before cache

http-response set-header X-ASDF fdsa

Compress before cache

backend app
filter compression
compression algo gzip
compression type text/html text/plain text/css text/javascript
filter cache
cache-rule all

Purging cache

curl -XPURGE https://127.0.0.1/imgs/test.jpg

If you define cache purge-method MYPURGE in global, you can use

curl -XMYPURGE https://127.0.0.1/imgs/test.jpg

Reference:

nuster - Project page

HA Proxy configuration

Performance benchmark: nuster vs nginx vs varnish

Sponsored:
To find embedded technology information about MCU, IoT, AI etc Check out embedkari.com.

Findbestopensource Editorial Team

We publish blog post about open source products. If you are interested in sharing knowledge about open source products, please visit write for us

Subscribe to our newsletter.

We will send mail once in a week about latest updates on open source tools and technologies. subscribe our newsletter

Ngnix - High Performance Web Server, Proxy Server, Content Cache and Reverse Proxy

Nginx is a High Performance Web Server, Proxy Server, Content Cache and Reverse Proxy server. It can also be used as mail proxy server and a generic TCP/UDP proxy server. Nginx claims to be more efficient and faster in the Web space compared to the other web servers. This can be evident with the architecture which is based on asynchronous event-driven approach. The event driven architecture enables to scale to hundreds / thousands of concurrent connections.

Should web application store images in Database or File system?

Web developers most frequent question, Should user images be stored in database or file system? Which is the best way. Both has some pros and cons.

Getting Started on Undertow Server

Undertow is a high performing web server which can be used for both blocking and non-blocking tasks. It is extermely flexible as application can assemble the parts in whatever way it would make sense. It also supports Servlet 4.0, JSR-356 compliant web socket implementation. Undertow is licensed under Apache License, Version 2.0.

Univention Corporate Server - An open source identity management system

Univention Corporate Server is an open source identity management system, an IT infrastructure and device management solution and an extensible platform with a store-like App Center that includes tested third party applications and further UCS components: This is what Univention combines in their main product Univention Corporate Server, a Debian GNU/Linux based enterprise distribution. This article provides you the overview of Univention Corporate Server, its feature and installation.

Lucene Vs Solr

Lucene is a search library built in Java. Solr is a web application built on top of Lucene. Certainly Solr = Lucene + Added features. Often there would a question, when to choose Solr and when to choose Lucene.

Caching using Ehcache Java Library

Ehcache from Terracotta is one of Java's most widely used Cache. It is concurrent and highly scalable. It has small footprint with SL4J as the only dependencies. It supports multiple strategies like Expiration policies, Eviction policies. It supports three storage tiers, heap, off-heap, disk storage. There are very few caching products supports multiple tier storage. If you want to scale, you cannot store all items in heap there should be support for off-heap and disk storage. Ehcache is licensed under Apache 2.0. In this article, we can see about basic usage of Ehcache.

Appserver.io – The First Multithreaded Application Server for PHP written in PHP

What if you could reliably run PHP without Nginx or Apache, but also without relying on its internal server? What if you could do async operations in PHP with true multi threading, fully taking advantage of multi core processors without hacks or a jungle of callbacks? What if you had drag and drop installation support for your PHAR packaged web apps in an environment identical to its production counterpart? Welcome to appserver.io – the worlds first open source application server for PHP.

LogicalDOC - Open Source DMS

LogicalDOC is both a document management and a collaboration system. The software is loaded with many functions and allows organizing, indexing, retrieving, controlling and distributing important business documents securely and safely for any organization and individual.

Cache using Hazelcast InMemory Data Grid

Hazelcast is an open source In-Memory Data Grid (IMDG). It provides elastically scalable distributed In-Memory computing, widely recognized as the fastest and most scalable approach to application performance. Hazelcast makes distributed computing simple by offering distributed implementations of many developer-friendly interfaces from Java such as Map, Queue, ExecutorService, Lock and JCache.

Scale up vs Scale out. First decision to make before moving to cloud

Before moving to cloud, First decision to make is whether Scale up the hardware or Scale out with multiple systems. Both has its pros and cons.

An Introduction to the UnQLite Embedded NoSQL Database Engine

UnQLite is an embedded NoSQL database engine. It's a standard Key/Value store similar to the more popular Berkeley DB and a document-store database similar to MongoDB with a built-in scripting language called Jx9 that looks like Javascript. Unlike most other NoSQL databases, UnQLite does not have a separate server process. UnQLite reads and writes directly to ordinary disk files. A complete database with multiple collections is contained in a single disk file. The database file format is cross-platform, you can freely copy a database between 32-bit and 64-bit systems or between big-endian and little-endian architectures.

How to install and setup Redis

Redis is an open source (BSD licensed), in-memory data structure store, used also as a database cache and message broker. It is written in ANSI C and works in all the operating systems. It supports data structures such as strings, hashes, lists, sets, sorted sets with range queries, bitmaps, hyperloglogs, geospatial indexes with radius queries and streams. This article explains about how to install Redis.

Advanced Programming Guide in Redis using Jedis

Redis is an in-memory data structure store, used as a database, cache and message broker. It supports data structures such as strings, hashes, lists, sets, sorted sets with range queries, bitmaps, hyperloglogs, geospatial indexes with radius queries and streams. This blog covers the advanced concepts like cluster, publish and subscribe, pipeling concepts of Redis using Jedis Java library.

MailHog - Web and API based SMTP testing

Most of the projects will have a requirement of sending and receiving mails. We have mentioned about GreenMail - Email Test Framework, in our previous article about API based SMTP testing. In this article, we discuss about MailHog - Web and API based SMTP testing. You send out a mail from your code and you can check it via web visually and also via API. Those who do API testing can check via API. Developers may want to visually verify the format of the mail. MailHog is a best bet for SMTP testing.

SeoToaster: easy, fast and efficient open source CMS for top SEO performance

SeoToaster is a free Open Source CMS & Ecommerce solution to build, manage and market websites optimized for for top search engine performance. As the name implies, Seo Toaster is to date the only content management system (CMS) to truly integrate SEO execution and web marketing automation technology in full compliance with the search engines industry’s best practices.

JWT Authentication using Auth0 Library

Json Web Token shortly called as JWT becomes defacto standard for authenticating REST API. In a traditional web application, once the user login credentials are validated, loggedin user object will be stored in session. Till user logs out, session will remain and user can work on the web application without any issues. Rest world is stateless, it is difficult to identify whether the user is already authenticated. One way is to use authenticate every API but that would be too expensive task as the client has to provide credentials in every API. Another approach is to use token.

AbanteCart - Easy to use open source e-commerce platform, helps selling online

AbanteCart is a free, open source shopping cart that was built by developers with a passion for free and accessible software. Founded in 2010 (launched in 2011), the platform is coded in PHP and supports MySQL. AbanteCart’s easy to use admin and basic layout management tool make this open source solution both easy to use and customizable, depending on the skills of the user. AbanteCart is very user-friendly, it is entirely possible for a user with little to no coding experience to set up and use this cart. If the user would be limited to the themes and features available in base AbanteCart, there is a marketplace where third-party extensions or plugins come to the rescue.

ONLYOFFICE Document Server, an online office app for Nextcloud and ownCloud

ONLYOFFICE Document Server is a free collaborative online office suite including viewers and editors for texts, spreadsheets and presentations, fully compatible with Office Open XML formats (.docx, .xlsx, .pptx). This article provides you the overview of ONLYOFFICE Document Server, its features, installation and integration with Nextcloud and ownCloud.

PrestaShop - A feature rich Open Source eCommerce solution

PrestaShop is an Open Source eCommerce Solution. It comes complete with over 310 features that have been carefully developed to assist business owners in increasing sales with virtually little effort. It is being used in more than 150,000 online stores.

Light4j Cookbook - Rest API, CORS and RDBMS

Light 4j is a fast, lightweight and cloud-native microservices framework. In this article, we will see what and how hybrid framework works and integrate with RDMS databases like MySQL, also built in option of CORS handler for in-flight request.