# Dev/Command-line/Thumbs

From XOWA: the free, open-source, offline wiki application

XOWA can generate two types of dumps: file-dumps and html-dumps

Please note that this script is for power users. It is not meant for casual users.

Please read through these instructions carefully. If you fail to follow these instructions, you may end up downloading millions of images by accident, and have your IP address banned by Wikimedia.

Also, the script will change in the future, and without any warning. There is no backward compatibility. Although the XOWA databases have a fixed format, the scripts do not. If you discover that your script breaks, please refer to this page, contact me for assistance, or go through the code.

## Overview

The download-thumbs script downloads all thumbs for pages in a specific wiki. It works in the following way:

- It loads a page.
- It converts the wikitext to HTML
  - If thumb mode is enabled, it compiles a list of [[File]] links.
  - If HTML-dump mode is enabled, it saves the HTML into XOWA html databases
- It repeats until there are no more pages
- If thumb mode, it does the following additional steps
  - It analyzes the list of [[File]] links to come up with a unique list of thumbs.
  - It downloads the thumbs and creates the XOWA file databases.

The script for simple wikipedia is listed below.

## Requirements

### commons.wikimedia.org

You will need the latest version of commons.wikimedia.org. Note that if you have an older version, you will have missing images or wrong size information.

For example, if you have a commons.wikimedia.org from 2015-04-22 and are trying to import a 2015-05-17 English Wikipedia, then any new images added after 2015-04-22 will not be picked up.

### www.wikidata.org

You also need to have the latest version of www.wikidata.org. Note that English Wikipedia and other wikis uses Wikidata through the {{#property}} call or Module code. If you have an earlier version, then data will be missing or out of date.

### Hardware

You should have a recent-generation machine with relatively high-performance hardware, especially if you're planning to generate images for English Wikipedia.

For context, here is my current machine setup for generating the image dumps:

- Processor: Intel Core i7-4770K; 3.5 GHz with 8 MB L3 cache
- Memory: 16 GB DDR3 SDRAM DDR3 1600 (PC3 12800)
- Hard Drive: 1TB SSD
- Operating System: openSUSE 13.2

(Note: The hardware was assembled in late 2013.)

For English Wikipedia, it still takes about 50 hours for the entire process.

### Internet-connectivity (optional)

You should have a broadband connection to the internet. The script will need to download dump files from Wikimedia and some dump files (like English Wikipedia) will be in the 10s of GB.

You can opt to download these files separately and place them in the appropriate location beforehand. However, the script below assumes that the machine is always online. If you are offline, you will need to comment the "util.download" lines yourself.

### Pre-existing image databases for your wiki (optional)

XOWA will automatically re-use the images from existing image databases so that you do not have to redownload them. This is particularly useful for large wikis where redownloading millions of images would be unwanted.

It is strongly advised that you download the image database for your wiki. You can find a full list here: http://xowa.sourceforge.net/image_dbs.html Note that if an image database does not exist for your wiki, you can still proceed to use the script

- If you have v1 image databases, they should be placed in `/xowa/file/wiki_domain-prv`. For example, English Wikipedia should have `/xowa/file/en.wikipedia.org-prv/fsdb.main/fsdb.bin.0000.sqlite3`
- If you have v2 image databases, they should be placed in `/xowa/wiki/wiki_domain/prv`. For example, English Wikipedia should have `/xowa/wiki/en.wikipedia.org/prv/en.wikipedia.org-file-ns.000-db.001.xowa`

## gfs

The script is written in the `gfs` format. This is a custom scripting format specific to XOWA. It is similar to JSON, but also supports commenting.

Unfortunately the error-handling for gfs is quite minimal. When making changes, please do them in small steps and be prepared to go to backups.

The following is a brief list of rules:

- Comments are made with either "//","\n" or "/*","*/". For example: `// single-line comment` or `/* multi-line comment*/`
- Booleans are "y" and "n" (yes / no or true / false). For example: `enabled = 'y';`
- Numbers are 32-bit integers and are not enclosed in quotes. For example, `count = 10000;`
- Strings are surrounded by apostrophes (') or quotes ("). For example: `key = 'val';`
- Statements are terminated by a semi-colon (;). For example: `procedure1;`
- Statements can take arguments in parentheses. For example: `procedure1('argument1', 'argument2', 'argument3');`
- Statements are grouped with curly braces. ({}). For example: `group {procedure1; procedure2; procedure3;}`

## Terms

### lnki

A `lnki` is short for "link internal". It refers to all wikitext with the double bracket syntax: [[A]]. A more elaborate example for files would be [[File:A.png|thumb|200x300px|upright=.80]]. Note that the abbreviation was chosen to differentiate it from `lnke` which is short for "link enternal". For the purposes of the script, all lnki data comes from the current wiki's data dump

### orig

- An `orig` is short for "original file". It refers to the original file metadata. For the purposes of this script, all orig data comes from commons.wikimedia.org

### xfer

- An `xfer` is short for "transfer file". It refers to the actual file to be downloaded.

### fsdb

- The `fsdb` is short for "file system database". It refers to the internal table format of the XOWA image databases.

## Script: Simple Wikipedia example with documentation

    app.bldr.pause_at_end_('n');
    app.scripts.run_file_by_type('xowa_cfg_app');
    app.cfg.set_temp('app', 'xowa.app.web.enabled', 'y');
    app.cfg.set_temp('app', 'xowa.bldr.db.layout_size.text', '0');
    app.cfg.set_temp('app', 'xowa.bldr.db.layout_size.html', '0');
    app.cfg.set_temp('app', 'xowa.bldr.db.layout_size.file', '0');
    app.bldr.cmds {
      // build commons database; this only needs to be done once, whenever commons is updated
      add     ('commons.wikimedia.org' , 'util.cleanup')          {delete_all = 'y';}
      add     ('commons.wikimedia.org' , 'util.download')         {dump_type = 'pages-articles';}
      add     ('commons.wikimedia.org' , 'util.download')         {dump_type = 'categorylinks';}
      add     ('commons.wikimedia.org' , 'util.download')         {dump_type = 'page_props';}
      add     ('commons.wikimedia.org' , 'util.download')         {dump_type = 'image';}
      add     ('commons.wikimedia.org' , 'text.init');
      add     ('commons.wikimedia.org' , 'text.page');
      add     ('commons.wikimedia.org' , 'text.term');
      add     ('commons.wikimedia.org' , 'text.css');
      add     ('commons.wikimedia.org' , 'wiki.page_props');
      add     ('commons.wikimedia.org' , 'wiki.categorylinks');
      add     ('commons.wikimedia.org' , 'text.cat.hidden');
      add     ('commons.wikimedia.org' , 'wiki.image');
      add     ('commons.wikimedia.org' , 'file.page_regy')        {build_commons = 'y'}
      add     ('commons.wikimedia.org' , 'wiki.page_dump.make');
      add     ('commons.wikimedia.org' , 'wiki.redirect')         {commit_interval = 1000; progress_interval = 100; cleanup_interval = 100;}
      add     ('commons.wikimedia.org' , 'util.cleanup')          {delete_tmp = 'y'; delete_by_match('*.xml|*.sql|*.bz2|*.gz');}

      // build wikidata database; this only needs to be done once, whenever wikidata is updated
      add     ('www.wikidata.org' , 'util.cleanup')          {delete_all = 'y';}
      add     ('www.wikidata.org' , 'util.download')         {dump_type = 'pages-articles';}
      add     ('www.wikidata.org' , 'util.download')         {dump_type = 'categorylinks';}
      add     ('www.wikidata.org' , 'util.download')         {dump_type = 'page_props';}
      add     ('www.wikidata.org' , 'util.download')         {dump_type = 'image';}
      add     ('www.wikidata.org' , 'text.init');
      add     ('www.wikidata.org' , 'text.page');
      add     ('www.wikidata.org' , 'text.term');
      add     ('www.wikidata.org' , 'text.css');
      add     ('www.wikidata.org' , 'wiki.page_props');
      add     ('www.wikidata.org' , 'wiki.categorylinks');
      add     ('www.wikidata.org' , 'util.cleanup')          {delete_tmp = 'y'; delete_by_match('*.xml|*.sql|*.bz2|*.gz');}

      // build simple.wikipedia.org
      add     ('simple.wikipedia.org' , 'util.cleanup')          {delete_all = 'y';}
      add     ('simple.wikipedia.org' , 'util.download')         {dump_type = 'pages-articles';}
      add     ('simple.wikipedia.org' , 'util.download')         {dump_type = 'categorylinks';}
      add     ('simple.wikipedia.org' , 'util.download')         {dump_type = 'page_props';}
      add     ('simple.wikipedia.org' , 'util.download')         {dump_type = 'image';}
      add     ('simple.wikipedia.org' , 'util.download')         {dump_type = 'pagelinks';}  // needed for sorting search results by PageRank
      add     ('simple.wikipedia.org' , 'util.download')         {dump_type = 'imagelinks';}
      add     ('simple.wikipedia.org' , 'text.init');
      add     ('simple.wikipedia.org' , 'text.page') {
        // calculate redirect_id for #REDIRECT pages. needed for html databases
        redirect_id_enabled = 'y';
      }
      add     ('simple.wikipedia.org' , 'text.search');

      // upload desktop css
      add     ('simple.wikipedia.org' , 'text.css');

      // upload mobile css
      add     ('simple.wikipedia.org' , 'text.css') {css_key = 'xowa.mobile'; /* css_dir = 'C:\xowa\user\anonymous\wiki\simple.wikipedia.org-mobile\html\'; */}

      add     ('simple.wikipedia.org' , 'text.term');

      add     ('simple.wikipedia.org' , 'wiki.page_props');
      add     ('simple.wikipedia.org' , 'wiki.categorylinks');

      // create local "page" tables in each "text" database for "lnki_temp"
      add     ('simple.wikipedia.org' , 'wiki.page_dump.make');

      // create a redirect table for pages in the File namespace
      add     ('simple.wikipedia.org' , 'wiki.redirect')         {commit_interval = 1000; progress_interval = 100; cleanup_interval = 100;}

      // create an "image" table to get the metadata for all files in the current wiki
      add     ('simple.wikipedia.org' , 'wiki.image');

      // create an "imagelinks" table to find out which images are used for the wiki
      add     ('simple.wikipedia.org' , 'wiki.imagelinks');

      // parse all page-to-page links
      add     ('simple.wikipedia.org' , 'wiki.page_link');

      // calculate a score for each page using the page-to-page links
      add     ('simple.wikipedia.org' , 'search.page__page_score') {iteration_max = 100;}

      // update link score statistics for the search tables
      add     ('simple.wikipedia.org' , 'search.link__link_score') {page_rank_enabled = 'y';}

      // update word count statistics for the search_word table
      add     ('simple.wikipedia.org' , 'search.word__link_count')

      // cleanup all downloaded files as well as temporary files
      add     ('simple.wikipedia.org' , 'util.cleanup')          {delete_tmp = 'y'; delete_by_match('*.xml|*.sql|*.bz2|*.gz');}

      // OBSOLETE: use v2
      // v1 html generator
      // parse every page in the listed namespace and gather data on their lnkis.
      // this step will take the longest amount of time.
    /*
      add     ('simple.wikipedia.org' , 'file.lnki_temp') {
        // save data every # of pages
        commit_interval = 10000;

        // update progress every # of pages
        progress_interval = 50;

        // free memory by flushing internal caches every # of pages
        cleanup_interval = 50;

        // specify # of pages to read into memory at a time, where # is in MB. For example, 25 means read approximately 25 MB of page text into memory
        select_size = 25;

        // namespaces to parse. See en.wikipedia.org/wiki/Help:Namespaces
        ns_ids = '0|4|14';

        // enable generation of ".html" databases. This will increase processing time by 20% - 25%
        hdump_bldr {
          // generate html databases
          enabled = 'y';

          // compression method for html: 1=none; 2=zip; 3=gz; 4=bz2
          zip_tid = 3;

          // enable additional custom compression
          hzip_enabled = 'y';

          // perform extra validation step of custom compression
          hzip_diff = 'y';
        }
      }
    */
      // v2 html generator; allows for multi-threaded / multi-machine builds
      add     ('simple.wikipedia.org' , 'wiki.mass_parse.init') {cfg {ns_ids = '0|4|14|8';}}

      add     ('simple.wikipedia.org' , 'wiki.mass_parse.exec') {
        cfg {
          num_wkrs = 8; load_all_templates = 'y'; load_all_imglinks = 'y'; indexer_enabled = 'y';
          cleanup_interval = 50; hzip_enabled = 'y'; hdiff_enabled ='y'; manual_now = '2017-04-01 00:00:00'

          // uncomment the following 3 lines if using the build script as a "worker" helping a "server"
          // num_pages_in_pool = 32000;
          // mgr_url = '\\server_machine_name\xowa\wiki\en.wikipedia.org\tmp\xomp\';
          // wkr_machine_name = 'worker_machine_1'
        }
      }

      // note that if multi-machine mode is enabled, all worker directories must be manually copied to the server directory (a build command will be added later)
      add     ('simple.wikipedia.org' , 'wiki.mass_parse.make');

      // aggregate the lnkis
      add     ('simple.wikipedia.org' , 'file.lnki_regy');

      // generate orig metadata for files in the current wiki (for example, for pages in en.wikipedia.org/wiki/File:*)
      add     ('simple.wikipedia.org' , 'file.page_regy')        {build_commons = 'n';}

      // generate all orig metadata for all lnkis
      add     ('simple.wikipedia.org' , 'file.orig_regy');

      // generate list of files to download based on "orig_regy" and XOWA image code
      add     ('simple.wikipedia.org' , 'file.xfer_temp.thumb');

      // aggregate list one more time
      add     ('simple.wikipedia.org' , 'file.xfer_regy');

      // identify images that have already been downloaded
      add     ('simple.wikipedia.org' , 'file.xfer_regy_update');

      // download images. This step may also take a long time, depending on how many images are needed
      add     ('simple.wikipedia.org' , 'file.fsdb_make') {
        commit_interval = 1000; progress_interval = 200; select_interval = 10000;
        ns_ids = '0|4|14';

        // specify whether original wiki databases are v1 (.sqlite3) or v2 (.xowa)
        src_bin_mgr__fsdb_version = 'v1';

        // always redownload certain files
        src_bin_mgr__fsdb_skip_wkrs = 'page_gt_1|small_size';

        // allow downloads from wikimedia
        src_bin_mgr__wmf_enabled = 'y';
      }

      // generate registry of original metadata by file title
      add     ('simple.wikipedia.org' , 'file.orig_reg');

      // drop page_dump tables
      add     ('simple.wikipedia.org' , 'wiki.page_dump.drop');
    }
    app.bldr.run;

## Script: gnosygnu's actual English Wikipedia script (dirty; provided for reference only)

    app.bldr.pause_at_end_('n');
    app.scripts.run_file_by_type('xowa_cfg_app');
    app.cfg.set_temp('app', 'xowa.app.web.enabled', 'y');
    app.cfg.set_temp('app', 'xowa.bldr.db.layout_size.text', '0');
    app.cfg.set_temp('app', 'xowa.bldr.db.layout_size.html', '0');
    app.cfg.set_temp('app', 'xowa.bldr.db.layout_size.file', '0');
    app.bldr.cmds {
    /*
      add     ('www.wikidata.org' , 'util.cleanup')          {delete_all = 'y';}
      add     ('www.wikidata.org' , 'util.download')         {dump_type = 'pages-articles';}
      add     ('www.wikidata.org' , 'util.download')         {dump_type = 'categorylinks';}
      add     ('www.wikidata.org' , 'util.download')         {dump_type = 'page_props';}
      add     ('www.wikidata.org' , 'util.download')         {dump_type = 'image';}
      add     ('www.wikidata.org' , 'text.init');
      add     ('www.wikidata.org' , 'text.page');
      add     ('www.wikidata.org' , 'text.term');
      add     ('www.wikidata.org' , 'text.css');
      add     ('www.wikidata.org' , 'wiki.image');
      add     ('www.wikidata.org' , 'wiki.page_dump.make');
      add     ('www.wikidata.org' , 'wiki.page_props');
      add     ('www.wikidata.org' , 'wiki.categorylinks');
      add     ('www.wikidata.org' , 'wiki.redirect')         {commit_interval = 1000; progress_interval = 100; cleanup_interval = 100;}
      add     ('www.wikidata.org' , 'util.cleanup')          {delete_tmp = 'y'; delete_by_match('*.xml|*.sql|*.bz2|*.gz');}

      add     ('commons.wikimedia.org' , 'util.cleanup')          {delete_all = 'y';}
      add     ('commons.wikimedia.org' , 'util.download')         {dump_type = 'pages-articles';}
      add     ('commons.wikimedia.org' , 'util.download')         {dump_type = 'image';}
      add     ('commons.wikimedia.org' , 'util.download')         {dump_type = 'categorylinks';}
      add     ('commons.wikimedia.org' , 'util.download')         {dump_type = 'page_props';}
      add     ('commons.wikimedia.org' , 'text.init');
      add     ('commons.wikimedia.org' , 'text.page');
      add     ('commons.wikimedia.org' , 'text.term');
      add     ('commons.wikimedia.org' , 'text.css');
      add     ('commons.wikimedia.org' , 'wiki.image');
      add     ('commons.wikimedia.org' , 'file.page_regy')        {build_commons = 'y'}
      add     ('commons.wikimedia.org' , 'wiki.page_dump.make');
      add     ('commons.wikimedia.org' , 'wiki.redirect')         {commit_interval = 1000; progress_interval = 100; cleanup_interval = 100;}
      add     ('commons.wikimedia.org' , 'util.cleanup')          {delete_tmp = 'y'; delete_by_match('*.xml|*.sql|*.bz2|*.gz');}

      add     ('en.wikipedia.org' , 'util.download')         {dump_type = 'pages-articles';}
      add     ('en.wikipedia.org' , 'util.download')         {dump_type = 'pagelinks';}
      add     ('en.wikipedia.org' , 'util.download')         {dump_type = 'categorylinks';}
      add     ('en.wikipedia.org' , 'util.download')         {dump_type = 'page_props';}
      add     ('en.wikipedia.org' , 'util.download')         {dump_type = 'image';}
      add     ('en.wikipedia.org' , 'util.download')         {dump_type = 'imagelinks';}
    */

    /*
      // en.wikipedia.org
      add     ('en.wikipedia.org' , 'text.init');
      add     ('en.wikipedia.org' , 'text.page')             {redirect_id_enabled = 'y';}
      add     ('en.wikipedia.org' , 'text.search');
      add     ('en.wikipedia.org' , 'text.css');
      add     ('en.wikipedia.org' , 'text.term');
      add     ('en.wikipedia.org' , 'wiki.image');
      add     ('en.wikipedia.org' , 'wiki.imagelinks');
      add     ('en.wikipedia.org' , 'wiki.page_dump.make');
      add     ('en.wikipedia.org' , 'wiki.redirect')         {commit_interval = 1000; progress_interval = 100; cleanup_interval = 100;}
      add     ('en.wikipedia.org' , 'wiki.page_link');
      add     ('en.wikipedia.org' , 'search.page__page_score') {iteration_max = 100;}
      add     ('en.wikipedia.org' , 'search.link__link_score') {page_rank_enabled = 'y';
        score_adjustment_mgr {
          match_mgr {
            get(0) {
              add('bgn', 'mult', '.999', 'List_of_', 'National_Register_of_Historic_Places_listings_');
              add('end', 'mult', '.999', '_United_States_Census');
              add('all', 'mult', '.999', 'Copyright_infringement', 'Time_zone', 'Daylight_saving_time');
              add('all', 'add' , '0'   , 'Animal');
            }
          }
        }
      }
      add     ('en.wikipedia.org' , 'search.word__link_count');
      add     ('en.wikipedia.org' , 'wiki.page_props');
      add     ('en.wikipedia.org' , 'wiki.categorylinks');

      add     ('en.wikipedia.org' , 'file.page_regy')        {build_commons = 'n'}
    //  add     ('en.wikipedia.org' , 'wiki.mass_parse.resume');
      add     ('en.wikipedia.org' , 'wiki.mass_parse.init') {cfg {ns_ids = '0|4|100|14|8';}}
      add     ('en.wikipedia.org' , 'wiki.mass_parse.exec') {cfg {
        num_wkrs = 8; load_all_templates = 'y'; load_all_imglinks = 'y'; indexer_enabled = 'y';
        cleanup_interval = 50; hzip_enabled = 'y'; hdiff_enabled ='y'; manual_now = '2017-04-01 00:00:00'
        }
      }
    */

    /*
      add     ('en.wikipedia.org' , 'wiki.mass_parse.make');
      // SELECT * FROM image ORDER BY img_timestamp DESC LIMIT 20;  // 20170306194400
      // SELECT * FROM page WHERE page_namespace = 6 ORDER BY page_touched DESC LIMIT 20; // 20170302024207
      // SELECT * FROM xowa_cfg WHERE cfg_key = 'props.modified_latest';
      add     ('commons.wikimedia.org' , 'file.page_regy')        {build_commons = 'y'}
      add     ('en.wikipedia.org'      , 'file.page_regy')        {build_commons = 'n';}
      add     ('en.wikipedia.org' , 'file.lnki_regy');
    //  add     ('en.wikipedia.org' , 'wiki.image');
      add     ('en.wikipedia.org' , 'file.orig_regy');
      add     ('en.wikipedia.org' , 'file.xfer_temp.thumb');

    //  SELECT * FROM orig_regy WHERE lnki_ttl = 'BSicon_CONTr.svg';
    //  SELECT * FROM page_regy WHERE src_ttl = 'BSicon_CONTr.svg';
    //  SELECT Count(*) FROM xfer_regy WHERE xfer_status = 0;
    //  SELECT * FROM xfer_regy WHERE xfer_status = 0 AND lnki_page_id = 372692; --en.w:Featured_picture_candidates

      add     ('en.wikipedia.org' , 'file.xfer_regy');
      add     ('en.wikipedia.org' , 'file.xfer_regy_update');
    */

    /*
      add     ('en.wikipedia.org' , 'file.fsdb_make') {
        commit_interval = 1000; progress_interval = 200; select_interval = 10000;
        ns_ids = '0|4|100|14|8';
    //    // specify whether original wiki databases are v1 (.sqlite3) or v2 (.xowa)
    //    src_bin_mgr__fsdb_version = 'v2';

    //   trg_bin_mgr__fsdb_version = 'v1';

        // always redownload certain files
        src_bin_mgr__fsdb_skip_wkrs = 'page_gt_1|small_size';

        // allow downloads from wikimedia
        src_bin_mgr__wmf_enabled = 'y';
      }
      add     ('en.wikipedia.org' , 'file.orig_reg');
      add     ('en.wikipedia.org' , 'wiki.page_dump.drop');
      add     ('en.wikipedia.org' , 'file.page_file_map.create');
    */
    }
    app.bldr.run;

## Change log

- 2016-10-12: explicitly set web_access_enabled to y
- 2017-02-02: added multi-threaded version and new options
- 2017-05-12: added full-text search

### XOWA

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