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HTTPS to HTTP redirect for a single page

Web servers : Apache + nginx

Redirecting a single page with HTTPS to the page with HTTP. Server configuration: Apache + nginx. SSL is enabled for the whole web site, so all pages are served with HTTPS. But there is a need to make just one single page to be with HTTP. Directives for .htaccess file:

RewriteEngine On

RewriteCond %{HTTP:HTTPS} on [NV]

RewriteRule ^(page\.html)$ http://%{HTTP_HOST}/$1 [R=301,L,QSA]

HTTPS to HTTP redirect for a single page in detail

-- Enable runtime rewriting engine

RewriteEngine On

-- If HTTPS is present

RewriteCond %{HTTP:HTTPS} on [NV]

-- Then, when a page name and extension correspond to the search group in parentheses, form for it a URI with HTTP

RewriteRule ^(page\.html)$ http://%{HTTP_HOST}/$1 [R=301,L,QSA]

Notes

  • RewriteCond %{HTTP:HTTPS} on [NV] is not the only way to detect if HTTPS is present. Moreover, for some server configurations other directives may be more suitable, like RewriteCond %{SERVER_PORT} 443 for example. The point is to find out somehow if HTTPS is on. So it should probably be checked by practice what is going to work in a particular case.
  • QSA is used to keep the existing query string, if there is any, when the replacement URI also contains a query string. So that in the end both query strings are to be combined. More on the subject: http://httpd.apache.org/docs/2.2/rewrite/flags.html#flag_qsa

Aliosque subditos et thema

 

CSS centering absolutely positioned elements

 

CSS horizontal centering of an absolutely positioned element. Example: HTML / XHTML. Code: <div class="example"> <img src="image.jpg" alt="Image" /> </div> CSS. Code: .example {position: relative; left: 0px; top: 0px; height: 90px; width: 100%; float: left; padding: 10px; border: 1px #ccc solid; background: #fafafa; -moz-box-sizing: border-box; -webkit-box-sizing: border-box; -ms-box-sizing: border-box; box-sizing: border-box;} .example img {position: absolute; left: 0px; right: 0px; margin: 0px auto; width: 68px;} An absolutely positioned img is centered in the example. But this method of horizontal centering also works with other both inline and block absolutely positioned elements. The width of an absolutely positioned element may also be in percent or other units. CSS properties of a container (here it is .example), holding an element to be centered, may vary. The element's centering is achieved by styles applied to the element itself: .example img {position: absolute; left: 0px; right: 0px; margin: 0px auto;}. [ 1 ] As well as Netscape 8.01+, Mozilla 1.5+. [ 2 ] As well as Netscape 8.01+, Mozilla 1.5+.

JavaScript + CSS centering

 

Centering content of a web page by means of JavaScript and CSS. A block containing the content of a page is JavaScript + CSS centered horizontally and vertically. Two cases: 1. A block is centered, if screen resolution is equal to or greater than 1024x768 - [ Open demo page ] 2. A block is centered, if screen resolution is equal to or greater than 1024x768 + mouse cursor is moved over a link in an element of the page content - [ Open demo page ] JavaScript and CSS horizontal and vertical centering. The first case. Step by step. 1. A web page, the part of which is going to be the element the JavaScript + CSS horizontal and vertical centering is to be applied to: HTML / XHTML. Code: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <title>JavaScript + CSS horizontal and vertical centering. The first case. Step 1</title> <meta http-equiv="Content-Type" content="text/html; charset=Windows-1252" /> <link rel="stylesheet" type="text/css" href="1.css" /> </head> <body>   </body> </html> CSS. Code: html {height: 100%; margin: 0px;} body {background-color: #fff; margin: 0px; height: 100%;} 2. A block element A (grey color) with dimensions declared explicitly, for instance 800 by 500 pixels and with relative positioning is created in the document's body. [ Open demo page ] HTML / XHTML. Code: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <title>JavaScript + CSS horizontal and vertical centering. The first case. Step 2</title> <meta http-equiv="Content-Type" content="text/html; charset=Windows-1252" /> <link rel="stylesheet" type="text/css" href="2.css" /> </head> <body> <div class="element_A">&nbsp;</div> </body> </html> CSS.