linux:applicaties:interchange:ic-vlink-tlink2catalog
Inhoud
Interchange: How vlink/tlink communicates with the Catalog
Interchange is an Open Source perl application server targeted at
e-commerce web applications.1)
This document describes how the web server communicates with the
Interchange application server.
Interchange version: 5.7.7
Webserver: Apache2
Interchange Link Program
The Interchange link program links the Interchange application server to the web server via CGI. Interchange link programs come in three flavours:
| Interchange Link Programs | ||
|---|---|---|
| Type | Communicates via | Comment |
| vlink | Unix domain socket | Local communication via a “socket file” |
| tlink | Inet domain socket | Webserver and Interchange server can be on different hosts |
| tlink.pl | Inet domain socket | tlink program (perl version) |
The unix socket (vlink) or host/port (tlink) to be connected to is configured into the link program by the compile_link perl script. 2)
More information:
http://www.icdevgroup.org/xmldocs/glossary/link-program.html
The complete flow chart
- The browser requests: http://webhost.somedom.com/mycatalog/index.html
- Apache2 processes the URL:
- /mycatalog matches a ScriptAlias in the config file: /etc/apache2/sites-available/webhost
ScriptAlias /mycatalog /export/home/appbox/cgi-bin/ic/mycatalog
- Apache2 invokes the CGI-program: /export/home/appbox/cgi-bin/ic/mycatalog3)
- The mycatalog link program connects to the interchange daemon via a UNIX- or INET domain socket.4)
- The interchange daemon searches the interchange.cfg for a matching URL:5)
FullURL yes Catalog mycatalog /export/home/appbox/catalogs/mycatalog webhost.somedom.com/mycatalog
- The interchange daemon uses the cgi extra path information to process the page:
- URL: http://webhost.somedom.com/mycatalog/index.html
- CGI extra path info: /index.html
- CATROOT: /export/home/appbox/catalogs/mycatalog
- Page to be processed: CATROOT/pages/index.html
- The interchange daemon returns the processed page data to Apache2
- Apache2 passes the data to the web browser
- The web browser displays the page.
.
Copyright © 2013 Integrated Services; Tux4u.nl
Author: Marjan Waldorp; ic-vlink-tlink2catalog 2013-07-17
2)
Dig into the compile_link script for the default values.
3)
In this example the Interchange server and Catalogs are installed in a user's home directory:
/export/home/appbox
/export/home/appbox
4)
mycatalog is a copy of vlink or tlink.
5)
The interchange.cfg may include multiple config files.
E.g. (Debian package):
include /var/lib/interchange/catalog.d/*.cfg
E.g. (Debian package):
include /var/lib/interchange/catalog.d/*.cfg
linux/applicaties/interchange/ic-vlink-tlink2catalog.txt · Laatst gewijzigd: 2018/12/30 17:17 (Externe bewerking)
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