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Arachne. Graphical web browser for DOS

Operating systems : MS-DOS 6.0+, FreeDOS 1.0+

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Arachne web browser. Installing and setting up for internet connection via Ethernet

Arachne web browser. Installing and setting up for dial-up internet connection


Versions : Configuration and use : Download links

Arachne is a full-screen graphical web browser for DOS on PC computers. Originally developed by Michael Polák. First release - 22th December 1996. The last Arachne version by Arachne Labs was released on 22th January 2001. Arachne source code was opened in November of 2003 and the subsequent versions are released under GNU GPL license.

Arachne is distributed as a software suite containing, besides web browser, built-in e-mail client, FTP, internet connection wizard, WAV files player. More add-ons are available: image viewer, PDF, file managers, mplayer, Telnet client, IRC and more.

Arachne supports Windows-1251 and KOI8-R Cyrillic after additional packages are installed. Internet connection is via serial ports (COM) and Ethernet. There are also Arachne for Linux / SVGAlib.

Versions

GPL versions of Arachne. The main line of Arachne development. Major changes and updates take place within its framework. Maintained by a group of enthusiasts who also develop GPL version for Linux / SVGAlib.

Arachne Labs versions. Arachne Labs, xChaos software initially, were the main structure engaged in development of Arachne until 2003, when Arachne source code was opened and the GPL versions of the browser became the main line. The last Arachne Labs version was released on 22th January 2001: Arachne 1.70 Release 3.

Ray Andrews version. A GPL Arachne variation.

PTS-DOS version. Similar to the corresponding versions of Arachne, but to some extent integrated with the PTS-DOS distribution.

DR-WebSpyder. Based on Arachne. Basically - different web browser, for which Arachne is just an ancestor. Later the browser was renamed as Lineo EmBrowser.

Configuration and use

Arachne web browser was created in DOS and for DOS (the Linux version stands somewhat apart). Therefore, even though Arachne will run under many versions of Windows, Windows XP for instance, it is working under DOS when Arachne qualities are revealed best.

Arachne web browser works in all major DOS variants, for example MS-DOS, FreeDOS or PTS-DOS.

System requirements are low. The minimum: 80x86 CPU, 500 KB DOS base memory, 1 MB XMS/EMS memory, 512 KB SVGA video, 5 MB HDD space. Although requirements for using maximum screen resolution, maximum color depth are higher. But in this case too they are extremely small by today's standards - 486, better Pentium I computer, 640 KB base memory, 8+ MB XMS/EMS memory, 2+ MB SVGA video. Yet it depends - using 640x480 screen resolution, installing Arachne on RAM disk let to have Arachne running quite well on 386 CPU computer; if only there are enough of RAM and video adapter capabilities.

Besides traditional hard disk installation, DOS LIVE CD by Roman Karpach may be used ( www.fdd5-25.net/doslivecd ), where Arachne web browser is among the software present.

The characteristics of Arachne web browser installation process make the main settings be set right from the beginning. These settings for the most part are the responsibility of operating system on computers running Windows, Mac OS X or Linux, but in DOS Arachne browser takes care of everything itself. So at the end of installation Arachne web browser is ready for use right away - in a specific, selected during installation process mode: for internet connection via COM port, for internet connection via network adapter, for browsing local files only.

Later, after installation is complete and settings are set, Arachne web browser can be reconfigured into any possible mode. But at first, Arachne is configured for either internet connection via COM port or internet connection via network adapter or the function of connecting to internet is turned off. Therefore further discussed:

1. Installing and setting up Arachne web browser for dial-up internet connection.

2. Installing and setting up Arachne web browser for internet connection via Ethernet.

The case when Arachne web browser is configured for browsing local files only is not discussed, since it is a simplified form of the first two.

When a widescreen LCD computer display (a LCD with aspect ratio more than 4:3, like 16:9) is used, one needs to know if the display supports aspect scaling / pillarboxing. If yes - how. The maximum screen resolution supported by Arachne web browser is 1024x768. So, to prevent image to be distorted in LCD, aspect scaling / pillarboxing has to be employed.

Download links


Aliosque subditos et thema

 

HTTP to HTTPS redirect in .htaccess

 

Redirecting from HTTP to HTTPS, when the web server serving the pages is behind a load balancer or reverse proxy. Server configuration: Apache + nginx; SSL is enabled; SSL-certificate is purchased, approved and installed. That is, everything is up and running. So it is just the HTTP to HTTPS redirection that is left to get ready and start up. Directives for .htaccess file: RewriteEngine On RewriteCond %{HTTP_HOST} !^www\. [NC] RewriteRule ^(.*)$ http://www.%{HTTP_HOST}/$1 [R=301,L] RewriteCond %{HTTP:X_FORWARDED_PROTO} !https [NC] RewriteRule ^(.*)$ https://%{HTTP_HOST}/$1 [R=301,L] HTTP to HTTPS redirect -- Enable runtime rewriting engine: RewriteEngine On -- If domain name has no www: RewriteCond %{HTTP_HOST} !^www\. [NC] -- Then replace it with domain with www: RewriteRule ^(.*)$ http://www.%{HTTP_HOST}/$1 [R=301,L] -- If HTTPS is not present: RewriteCond %{HTTP:X_FORWARDED_PROTO} !https [NC] -- Then replace domain without HTTPS with domain with HTTPS: RewriteRule ^(.*)$ https://%{HTTP_HOST}/$1 [R=301,L] Notes 1. X_FORWARDED_PROTO may instead be called X-Forwarded-Proto or even else. The point is to obtain the information from a load balancer or reverse proxy on the original request it gets. Load balancers or reverse proxies may provide the web server with this info and a header named X_FORWARDED_PROTO or X-Forwarded-Proto or else may be sent, holding the protocol string. It is most often so, but not always. So it should probably be determined by practice how to get the protocol string in a particular case. 2. The other way is just to set the environment variable (if it is suitable for the given web server): SetEnvIf X_FORWARDED_PROTO https HTTPS=on Then directives for .htaccess file are to be like this: RewriteEngine On SetEnvIf X_FORWARDED_PROTO https HTTPS=on RewriteCond %{HTTP_HOST} !^www\. [NC] RewriteRule ^(.*)$ http://www.%{HTTP_HOST}/$1 [R=301,L] RewriteCond %{HTTP:HTTPS} !on [NV] RewriteRule ^(.*)$ https://%{HTTP_HOST}/$1 [R=301,L] 3. Apache Module mod_rewrite docs: http://httpd.apache.org/docs/current/mod/mod_rewrite.html

CSS centering

 

1 ) CSS horizontal and vertical centering - 1 Centering a container with the whole content of a web page inside in the viewable area of a web browser by means of CSS. A box to contain the whole content of the page is CSS centered horizontally and vertically. More for modern web browsers : [ More ] : [ Open demo page ] 2 ) CSS horizontal and vertical centering - 2 Centering a container with the whole content of a web page inside in the viewable area of a web browser by means of CSS. A box to contain the whole content of the page is CSS centered horizontally and vertically. More conservative, than the previous method. Suitable not only for modern web browsers, but for older ones as well - like Internet Explorer 6 or earlier Maxthon. A shortcoming - it takes more efforts to maintain the CSS code compared to [ CSS horizontal and vertical centering - 1 ] method : [ More ] : [ Open demo page ] 3 ) CSS centering floated elements Floated elements of unknown width are CSS centered horizontally : [ More ] : [ Open demo page ] 4 ) CSS centering absolutely positioned elements CSS horizontal centering of an absolutely positioned element : [ More ] 5 ) CSS centering image CSS horizontal centering of an image : [ More ] 6 ) CSS vertical alignment CSS vertical alignment of a block element containing text and images. The method works for various combinations of inline and block elements : [ More ] 7 ) 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 : [ More ] : 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 ]