= Сообщение: 1944 из 3030 =================================== GANJANET.LOCAL = От : Mithgol the Webmaster 2:5063/88 10 Feb 07 13:51:54 Кому : All 10 Feb 07 13:51:54 Тема : [10/11] FidoURL.txt FGHI : area://GANJANET.LOCAL?msgid=2:5063/88+45cda439 На : area://GANJANET.LOCAL?msgid=2:5063/88+45cda0c7 = Кодировка сообщения определена как: CP866 ================================== ============================================================================== * изначально написано в эхоконференцию FTSC_PUBLIC * также было отослано в эхоконференцию CU.TALK * также было отослано в эхоконференцию GANJANET.LOCAL * также было отослано в эхоконференцию RU.FIDO.WWW * также было отослано в эхоконференцию RU.FIDONET.TODAY * также было отослано в эхоконференцию RU.FTN.DEVELOP * также было отослано в эхоконференцию SU.FIDOTECH * также было отослано в эхоконференцию TITANIC.BEST
textsection 10 of 11 of file FidoURL.txt textbegin.section
It is possible for an optional parameter of an area URL to contain a regular expression. In section 7.2.1.4 a regex is used to specify the designated message(s); in section 7.2.4.1 a regex defines whether a kludge is visible.
The language of regular expressions has several dirrerent dialects. Perl Compatible Regular Expressions (PCRE) are chosen here as the recommended; that's because PCRE engine has a rich set of features, and because the engine is already embedded in ECMAScript-compatible browsers of the modern Web.
The language of regular expressions is far beyond the scope of this document. The article http://en.wikipedia.org/wiki/PCRE (in Wikipedia) and the external links referenced there are probably the best to start learning how to write PCRE regexes.
Some Fidonet browsers have their own JavaScript engines, that SHOULD conform to the requirements of the ECMA-262 standard, third edition, section 15.10. (The form and functionality of its regular expressions is modelled after the regular expression facility in the Perl 5 programming language.) Any other Fidonet browsers SHOULD use the PCRE library package, which is an open source software, written by Philip Hazel, and downloadable at http://www.pcre.org/
Fidonet gates in the Web SHOULD use either Perl itself, or PCRE implementation in PHP (preg_grep() function, for example), or any other suitable PCRE-compatible implementation.
A regular expression in a Fidonet URL MUST always take the form
/pattern/flags
The only possible flags (pattern modifiers) in Fidonet URLs are the letters "i" (if this modifier is set, letters in the pattern match both upper and lower case letters) and "m" (if this modifier is set, then the "start of line" and "end of line" constructs match immediately following or immediately before any newline in the subject string, respectively, as well as at the very start and end).
(In brief, "i" means ignoring of case, and "m" means multi-line mode of matching.)
7.2.4. Controlling the visibility of kludges and hidden lines -+-----------------------------------------------------------
This section is informative. Its subsection is normative.
Kludges (also known as klugde lines or as control paragraphs) are special lines embedded in the text body of a Fidonet message. Sometimes kludges are used to support new addressing and other control information, sometimes they contain pieces of auxiliary information about the message's author (location, ICQ UIN, Jabber ID, real name, current music, current mood, etc.) See technical details in FTS-4000.
It is said in FTS-4000 that the contents of kludges are intended for the programs processing the message (or the copies of the message) and not for presentation on the user interface level.
Fidonet messages usually contain some other special lines of the same nature, intended for the programs processing the message, and usually hidden from the user. However, that hidden lines do not start from SOH (Ctrl+A, ASCII 1) symbol, and thus are not kludges. Seen-by stamps, for example, are hidden lines.
Users are generally able to specify (in user settings or just by hotkeys) which kludges and hidden lines are hidden and which are visible in their Fidonet browsers. For example, moderators use hidden lines to control the expansion of their echoes. Many of the non-standard kludges (e.g. location, ICQ UIN, Jabber ID, real name, current music, current mood, etc.) are intended to be read by humans, but are designed as kludges so that thay can be easily hidden by readers annoyed by excessive headers.
If an author of some "area://" URL feels that some kludge and/or some hidden line of the designated message contains relevant information, then the author MAY append an optional parameter to that URL, in order to overcome the user settings and to show the desired kludge or hidden line.
The value of the "kl" optional parameter contains a regular expression; if the rest of the URL designates message(s), then the Fidonet browser, when it shows the body (bodies) of that message(s) to its user, SHOULD NOT hide any of kludges or hidden lines that match the given expression.
See section 7.2.3 for the details about regular expressions.
When testing whether a kludge matches a regular expression, the SOH (Ctrl+A, ASCII 1) symbol MUST be omitted. For example, /^[PT]ID/ expression MUST match both "PID" and "TID" kludges, though there is SOH between the line beginning (^) and the first symbol of the kludge ([PT]) in both of the kludges.
Consequently, "kl=" regular expressions differ with "find=" regular expressions for kludges (see subsection 7.2.1.4), and "kl=" expressions are shorter.
It is also not necessary for a "kl=" expression to contain "m" flag, because the "^" construct already matches at the beginning of each kludge.
encoded: ...&kl=/path/i regex: /path/i matches: PATH: 5030/1543 966 5020/4441 5080/1003 5020/830 matches: Now playing: Children of Dune - The Golden Path
encoded: ...&kl=/.*/ regex: /.*/ what it means: The browser SHOULD show all of the kludges and hidden lines of the message(s).
textend.section
With best Fidonet 2.0 regards, Mithgol the Webmaster. [Real nodelisted name: Sergey Sokoloff]
... 151. I will not set myself up as a god. --- Something is rotten in the state of Denmark. (Shakespeare, Hamlet, I, IV) * Origin: And the Soviets ── waist-deep in the snow ── marched in (2:5063/88)
