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There"s more... in Software Access 2d Data Matrix barcode in Software There"s more... ASP.NET bar code




How to generate, print barcode using .NET, Java sdk library control with example project source code free download:
There"s more... using barcode integration for none control to generate, create none image in none applications.generate barcode asp.net As Apache is widely u none none sed, there is not much point in showing off other features that aren"t needed. However, you can even do transparent upgrades of your applications with zero downtime!. upc Transparent upgrade of your application As this feature of up none for none grading your application without any downtime is already written in the documentation, it does not make any sense to talk about it in this book, so just check out. http://www.playframew ork.org/documentation/1.

1.1/production# Apacheasafrontproxytoallowtransparentupgradeofyourapplication..

7 . Setting up the Nginx web server with Play Nginx is a high perfo none none rmance web server and proxy, which is used by many big sites. If you need Nginx, you either have a high performance site, or you like the asynchronous event driven approach of it, which ensures a consistent usage of memory almost regardless of the connection amount. Nginx comes with a ton of features, but most likely, only the proxying and SSL features are needed in this recipe.

The source code of the example application is available at examples/chapter7/ssl/ example-app as well as for examples/chapter7/ssl/example-app-2 for the second application instance. The configuration files for the web server are put in examples/ chapter7/nginx..

Getting ready Nginx should be insta none none lled, and up and running. Execute apt-get install nginx on any Debian derived distribution..

How to do it... Let us start with a s none none ingle external port 80 to internal port 9000 redirection:. server { listen 80;. location / { proxy_se none for none t_header Host $host; proxy_set_header X-Forwarded-Host $host; proxy_set_header X-Forwarded-Server $host; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_pass http://192.168.0.

2:9000; proxy_redirect http://192.168.0.

2:9000/ http://your.external. domain/; }.

The next step is to g et SSL up and running:. server { listen serve none none r_name ssl ssl_certificate ssl_certificate_key ssl_protocols ssl_ciphers 443; your.server.name; on; /etc/nginx/host.

crt; /etc/nginx/host.key; SSLv3 TLSv1; HIGH:!ADH:!MD5;. Running in Production location / { proxy_se none for none t_header Host $host; proxy_set_header X-Forwarded-Host $host; proxy_set_header X-Forwarded-Server $host; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header X-Forwarded-Ssl on; proxy_set_header X-Forwarded-Proto https; proxy_pass http://192.168.0.

2:9000; } }. As usual, load balanc ing is the last part of the setup:. upstream www.test.local { server 192.168.0.2:9000; server 192.168.0.3:9000; } server { listen location / { proxy_se t_header Host $host; proxy_set_header X-Forwarded-Host $host; proxy_set_header X-Forwarded-Server $host; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_pass http://www.test.local; proxy_redirect / http://www.

test.local/; } }. How it works... While taking a closer look at the setup, there are almost no differences to the Apache setup except for the header rewriting. A closer look has to be taken at the proxy_redirect directive, as this is changing depending whether you are load balancing or not. If you need load balancing support, you should make sure that you name the cluster the same as your site.

This allows a far more readable configuration, when using the proxy_pass directive. The SSL configuration also sets all needed headers, where in most cases, some predefined variables are used, like the $host one. For a complete reference go to http://wiki.

nginx.org/HttpCoreModule#Variables. Furthermore, you should make sure that the server_name directive in the SSL configuration matches with the SSL certificate host name.

. 7 . There"s more... You could possibly us none none e Nginx for many more things because it has support for memcached, MPEG, and flash streaming or WebDAV.. More information about Nginx Nginx had the problem none for none of not having too much documentation. However, today the website at http://www.nginx.

org as well as the wiki at http://wiki.nginx.org/ show you most of the configuration options.

Furthermore, there is also a good book named Nginx HTTP Server about Nginx, which is also released by Packt Publishing.. Better load balancing Nginx has a nice modu none for none le called fair balancer that keeps in mind which node has the lowest load by counting currently processed requests, and thus balances all requests in an even manner instead of using pure round-robin based load balancing.. Transparent upgrade of your application You can remove the no none for none de to be upgraded out of your load balancing configuration and call nginx -s reload to force it to reread its configuration. Then update your application and re-enable it in the configuration file. Reload the configuration again and you are done.

. Setting up the Lighttpd web server with Play Lighttpd (pronounced none none lighty) is another lightweight web server, similar to Nginx, as it also handles requests asynchronously. It is a matter of taste, and which web server you prefer, so this recipe is here for the sake of completeness. The source code of the example application is available at examples/chapter7/ssl/ example-app as well as for examples/chapter7/ssl/example-app-2 for the second application instance.

The configuration files for the web server are put in examples/ chapter7/lighttpd..
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