Tutorial on how to install and configure htDig search for your web site. The Linux Information Portal includes informative tutorials and links to many Linux sites. WWW Search Engine Software. Contribute to roklein/htdig development by creating an account on GitHub. Htdig retrieves HTML documents using the HTTP protocol and gathers information from these documents which can later be used to search these documents.

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It is not meant to replace any of the many internet-wide search engines. No, as above, ht: While there is theoretically nothing to stop you from indexing as much as you wish, practical considerations e. Of course an index doesn’t do you much good without a program to sort it, search through it, etc.

Andrew no longer does much work on ht: He has started a company, called Contigo Software and is quite busy with that. Since we all have other jobs, it make take a while before someone gets back to you.

If you have an idea or even better, a patchplease send it to the ht: For suggestions on how to submit patches, please check the Guidelines for Patch Submissions. If you’d like to make a feature request, you can do so through the ht: If you would like an iron-clad, legally-binding guarantee, feel free to check the source code itself. If you discover something, please let us know! Well, there are probably bugs out there.

You have two options for bug-reporting. You can either mail the ht: Please try to include as much information as possible, including the version of ht: Often, running the programs with one “-v” or more e. Phrase searching has been added for the 3. Anyone who wishes to live on the bleeding edge literally to test out the phrase searching should e-mail the developer list at: The code itself doesn’t put any real limit on the number of pages. There are several sites in the hundreds of thousands of pages.

As for practical limits, it depends a lot on how many pages you plan on indexing. Some operating systems limit files to 2 GB in size, which can become a problem with a large database. There are also slightly different limits to each of the programs. Right now htmerge performs a sort on the words indexed. Most sort programs use a fair amount of RAM and temporary disk space as they assemble the sorted list.

ht://Dig Frequently Asked Questions

htsig The htdig program abd a fair amount of information about the URLs it visits, in part to only index a page once.

This takes a fair amount of RAM. With cheap RAM, it never hurts to throw more memory at indexing larger sites. In a pinch, swap will work, but it obviously really slows things down. A list of such ISPs is available at http: What’s the latest version of ht: The latest version is 3. Development is beginning on htdig4 as well as a few interim releases of htdig3.


We’re trying to get consistent binary distributions for popular platforms. Contributed binary releases will go in http: Anyone who would like to make consistent binary distributions of ht: Not at the moment. Most versions are also distributed as a patch to the previous version’s source code. The most recent exception to this was version 3. Since this version switched from the GDBM database to DB2, the new database package needed to be shipped anr the distribution.

This made the potential patch almost as large as the regular distribution. Update patches resumed with version 3. This is due to a bug in the Makefile. Remove all flags “-ggdb” in Makefile. This bug is htdi in version 3.

What you’re seeing are problems related to the Berkeley DB library.

That’s where htdig’s db library is. There are a variety of reasons ht: To get to the bottom of things, it’s advisable to turn on some debugging output from the htdig program. When running from the command-line, try “-vvv” in addition to any other flags. This will add debugging output, including hfdig responses from the server.

You can change the output format of htsearch by creating different header, footer and result files that specify how you want the output to look.

Site Search with HTDIG

You then create a configuration file that specifies which files to use. In the html document that links to the search, you specify which configuration file to use.

So the configuration file would have htdgi lines: Default You would also put into the configuration file any other hrdig from the default configuration file that apply to htsearch. Assuming your configuration file is called cc. The following line would do it: If you are having problems with this, check your server log files to see what file the server is attempting to return.

Yes, though you may find it easier to have one larger database and use restrict or exclude fields on searches. To use multiple databases, you will need a config file for each database. As of version 3. There are several ways htdg cut down on disk space. One is not to use the “-a” option, which creates work copies of the databases. Naturally this essentially doubles the disk usage.

Changing configuration variables can also help cut down on anc usage. Other techniques include removing the db. However, you can easily write a “wrapper” CGI or other server-parsed file that includes the htsearch results.

For other alternatives, see question 4. This must be done with an external parser. It uses catdoc to parse Word documents, and ps2ascii to parse PostScript files.


The comments in the Perl script indicate where you can obtain these converters. See below for an example. This too can be done with an external parser, in combination with the pdftotext program that is part of the xpdf 0. It uses pdftotext to parse PDF documents, then processes the text into external parser records. For example, you could put this in your configuration file: PDF documents can not be parsed if they are truncated.

This also raises the questions of why two different methods of indexing PDFs are supported, and which method is preferred. It had a few problems with it: Also, the built-in PDF support expected PDF documents to use the same character encoding as is defined in your current localewhich isn’t always the case. The external parser, which uses pdftotext, was developed to overcome these problems. It also converts various PDF encodings to the Latin 1 set. It is the opinion of the developers that this is the preferred method.

However, some users still prefer to stick with acroread, as it works well for them, and is a little easier to set up if you’ve already installed Acrobat. Also, pdftotext still has some difficulty handling text in landscape orientation, even with its new -raw option in 0.

The first and most important thing you must do, to allow ht: This is htddig by setting the locale attribute see question 5. The next step is to configure ht: These can be the same dictionary and affix files as are used by the ispell software. A collection of these is available from Geoff Kuenning’s International Ispell Dictionaries pageand we’re slowly building a collection of word lists on our web site.

htDig – Web Site Search

This command may actually take days to complete, for releases older than 3. Current releases use faster regular expression matching, which will speed this up by a few orders of magnitude. You will also need to redefine the synonyms file if you wish to use the synonyms search algorithm. Current versions of ht: While htsearch doesn’t currently provide a means of doing SSI on its output, or calling other CGI scripts, it does have the capability of using environment variables in templates.

The easiest way to get rotating banners in htsearch is to replace htsearch with a wrapper script that sets an environment variable to the banner content, or whatever dynamically generated content you want. Your script can then call the real htsearch to do the work. You’d then need to reference that environment variable in header.