Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.javascript > #18479

Re: Implement offline site search?

Show all headers | View raw

Robert Crandal wrote:

> Our website is stored on a local hard-drive on a computer
> that has no Internet access.  It's basically an offline website
> that only our company can use.
> 
> Is it possible to add a search feature to this website using
> Javascript?  I want to let users type a search string, and
> then somehow search all the HTML documents on the
> hard drive for string matches, then display a new HTML
> page with the search results.  Can Javascript do this?  How?

There is no Javascript.  But with an ECMAScript implementation such as 
JavaScript you can, in a sufficiently recent Web browser, use an 
implementation of the XMLHttpRequest API.

That API, with sufficient permissions granted, allows you to GET listings of 
(local) files (the format will vary between UAs) and to GET the file 
contents via URIs.  Having the files' content, you can build from that an 
index as an Object instance (preferably with empty prototype chain, or a 
collision-avoiding Map implementation such as JSX:map.js) that ultimately 
maps words (property names) to a list of files that contain them (references 
to Array instances of file names, as property values).  [As an optimization, 
a previous object could also map prefixes to words.]

You can store that index in serialized form in Local Storage and from that 
point forward only use the unserialized form of the index to perform the 
search until the index needs to be updated.

As an alternative, you can use other software to build a script resource 
with the index as an Object instance that you use for searches after you 
loaded that resource from an HTML document.  An example of that can be found 
in SELFHTML's offline search; the code quality thereis is awful, but 
debugging that code could still help.  Probably there are other, better 
implementations as this is not likely to be an uncommon problem.

-- 
PointedEars

Twitter: @PointedEars2
Please do not Cc: me. / Bitte keine Kopien per E-Mail.

Back to comp.lang.javascript | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Implement offline site search? "Robert Crandal" <rcranz143101@gmail.com> - 2013-02-13 01:23 -0700
  Re: Implement offline site search? Tim Slattery <Slattery_T@bls.gov> - 2013-02-13 09:04 -0500
    Re: Implement offline site search? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-02-13 15:23 +0100
    Re: Implement offline site search? "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2013-02-13 15:33 +0100
  Re: Implement offline site search? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-02-13 15:06 +0100
    Re: Implement offline site search? "Robert Crandal" <rcranz143101@gmail.com> - 2013-02-17 02:24 -0700
      Re: Implement offline site search? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-02-17 13:18 +0100
        Re: Implement offline site search? John G Harris <niam@jghnorth.org.uk.invalid> - 2013-02-17 16:14 +0000
        Re: Implement offline site search? "Robert Crandal" <rcranz143101@gmail.com> - 2013-02-17 11:54 -0700
          Re: Implement offline site search? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-02-17 20:52 +0100
            Re: Implement offline site search? "Robert Crandal" <rcranz143101@gmail.com> - 2013-02-17 15:10 -0700
              Re: Implement offline site search? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-02-17 23:16 +0100
              Re: Implement offline site search? Andrew Poulos <ap_prog@hotmail.com> - 2013-02-18 09:54 +1100
                Re: Implement offline site search? John G Harris <niam@jghnorth.org.uk.invalid> - 2013-02-18 10:17 +0000
                Re: Implement offline site search? "Robert Crandal" <rcranz143101@gmail.com> - 2013-02-18 11:43 -0700
                Re: Implement offline site search? Andrew Poulos <ap_prog@hotmail.com> - 2013-02-19 06:27 +1100
                Re: Implement offline site search? Andrew Poulos <ap_prog@hotmail.com> - 2013-02-19 06:33 +1100
            Re: Implement offline site search? Dr J R Stockton <reply1300@merlyn.demon.co.uk.invalid> - 2013-02-18 12:23 +0000
  Re: Implement offline site search? Martin Leese <please@see.Web.for.e-mail.INVALID> - 2013-02-13 10:23 -0700
    Re: Implement offline site search? "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2013-02-14 10:56 +0100
      Re: Implement offline site search? John G Harris <niam@jghnorth.org.uk.invalid> - 2013-02-14 10:20 +0000
        Re: Implement offline site search? "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2013-02-14 11:26 +0100
  Re: Implement offline site search? Wally W. <ww84wa@aim.com> - 2013-02-14 08:07 -0500
  Re: Implement offline site search? Dr J R Stockton <reply1300@merlyn.demon.co.uk.invalid> - 2013-02-14 22:47 +0000
  Re: Implement offline site search? Scott Sauyet <scott.sauyet@gmail.com> - 2013-02-14 18:49 -0800

csiph-web