Revision as of 05:56, 27 December 2013

Configuration File

Crawler's personalities are driven to a great extent by means of configuration files.

There is no hard rule that dictates how these configuration files should be created - they could be text files, INI-files, XML-based files,...

Because .INI files are easy to understand for end-users, most of the pre-made personalities use .INI-based configuration files.

For more popular personalities, GUI-driven configuration tools might be provided, but in many cases, the GUI-development might lag, in which case the next easiest method to (re)configure a Crawler personality is to edit one or more configuration files.

INI file

Basic INI files are a loosely defined de-facto standard; more info can be found here.

The Crawler INI files have the following properties:

• Section and entry names are case-insensitive by default (but Crawler has built-in support for case-sensitive INI files should the need arise).
• Comment lines are supported. Prefixing a line with a '#' or a ';' makes it a comment line. In-line comments are not supported: a single line is either a comment line or it is not - comments on lines with data are not supported. For example:

entry = test # test

means to set entry to "test # test"

• Blank lines are allowed (and ignored)
• If an INI file is missing a section, then any entries without section are assumed to be in a default section [main]
• Duplicate names are allowed, and provide an 'override' mechanism. If an entry appears twice, the second appearance will 'win'.
• Entry values can be enclosed between double quotes (") in which case backslashes are used as an escape character as defined in JavaScript. If no double quotes are present, backslashes are not interpreted as escapes. When no double quotes are present, leading and trailing spaces are removed. The following entries are all equivalent:

data =     my data
data = "my data"
data=my data
data="my\x20data"
data="my\u0020data"