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SolrWayback 3.2 software bundle released

Scroll down to the install guide below and follow the instructions.

About SolrWayback

SolrWayback will only work with warc-indexer version 3.0+

SolrWayback is web-application for browsing historical harvested ARC/WARC files similar to the Internet Archive Wayback Machine. The SolrWayback depends on a Solr server where Arc/Warc files have been indexed using the British Library WARC-Indexer. Unlike the Wayback Machine the SolrWayback does not need the CDX-server with meta data for the harvest. It only uses the Solr server and the raw Arc/Warc files.


SolrWayback comes with additional features:

  • Image search similar to google images
  • Search by uploading a file. (image/pdf etc.) See if the resource has been harvested and from where.
  • Link graph showing links (ingoing/outgoing) for domains using the D3 javascript framework.
  • Raw download of any harvested resource from the binary Arc/Warc file.
  • Export a search resultset to a Warc-file. Streaming download, no limit of size of resultset.
  • Build in SOCKS proxy to view historical webpages without browser leaking resources from the live web.

Search example showing hits. Images are shown in search-result.

Google like image search in the web-archive

Solrwayback showing an archived webpage with an overlay statistics and further navigation options.

Page previews for different harvest times of a given url. Images are generated real-time and uses the build in socks proxy to prevent leaking to the live web.

Interactive domain link graph

Github like visualization of crawltimes

Search by gps location for images having exif location information.

Streaming export

Any search result can be exported to WARC format. If any of the documents are indexed as ARC format, they will be converted to WARC format. There is useful when extracting a corpus (typical specific domains). There is no limit to the size of the export. Text information about a corpus can also be exported as a CSV file.

SOCKS proxy - No leaking to the live web

Solrwayback starts up listing on two ports. The default port 8080 and then port 9000 for SOCKS proxy v.4 mode. The default SOCKS proxy port in the property file is 9000. Configure your browser to run SOCKS v4 to port 9000 Ie. localhost port 9000 You can still connect to solrwayback without SOCKS mode to the normal port 8080. This useful so the page can be seen both with and without leaking, using two different browsers with 1 using SOCKS v.4 mode.

Root servlet. Catching and forwarding live leaks.

Installing the root-servlet will improve playback of sites that are leaking urls. The root-servlet will catch relative leaks (same domain) even without using proxy mode. Live leakes that are absolute (http://...) will only be catch if running proxy mode. The leaks will then be redirected back into SolrWayback to the correct URL and crawltime. The root-servlet is included in the bundle install. In Tomcat it must be named ROOT.war. Link to SolrWayback root proxy:


The API for linking to and browsing archived webpages is the same as for Internet Archive:

Internet Archive:
SolrWayback: http://server/solrwayback/services/web/20140515140841/

If using a Solr search based web archive such as Shine ( or Warclight ( you only need to change to property pointing from the wayback server to the SolrWayback server.


  • JDK 8/9. (Not working on Java 10+ yet)
  • Some Arc/Warc files
  • Tomcat 8+ or another J2EE server for deploying the WAR-file
  • A Solr 7.1+ server with the index build from the Arc/Warc files using the Warc-Indexer version 3.0
  • (Optional) chrome/(chromium) installed for page previews to work. (headless chrome)

Build and usage

  • Build the application with: mvn package
  • Deploy the target/solrwayback-*.war file in a web-container
  • Copy src/test/resources/properties/ and /src/test/resources/properties/ to user/home/ folder for the J2EE server
  • Modify the property files. (default all urls http://localhost:8080)
  • Optional: configure the log4j using the files in resources/tomcat
  • Restart tomcat.
  • Open search interface: http://localhost:8080/solrwayback

Run using Docker

  • Copy src/test/resources/properties/ to the project root directory and modify it to your needs.
  • Make sure Docker Engine is installed.
  • Run ./ from the project root.


Feel free to send emails with comments and questions.


All entries from the arc/warc files are indexed as separate documents using the WARC-Indexer and using the lucene schema required by the WARCIndexer.

A document is Solr can be html, image, video, audio, js etc. (content_type_norm) Filename and offset of a document in warc files is stored in solr and will be used and loaded during playback.

SolrWayback software bundle 3.2 install guide

With this download you will be able to index, search and playback web pages from your warc-files. The bundle contains Solr, the warc-indexer tool and Solrwayback installed on a Tomcat webserver. Just unzip the bundle and copy two files to your home directory and explore your warc files.


Download :
Unzip and follow the instructions below.


Works on MacOs/Linux/Windows.
For the Solrwayback software bundle you only need to have Java (64 bit) installed. Any Java version 8/9/10 will be compatible. (Not Java 11) To check java is installed, type the following from a prompt: java -version

Install instructions:

1) Upgrade from 3.1

To update from 3.1 add the new additional properties in and Download the release and to see the new properties. Also the map properties has been renamed. Replace the war-file in tomcat with this release and the add new root servlet (ROOT.WAR) and restart tomcat. Both war-files are attachments to this release to be downloaded (apache-tomcat-8.5.29/webapps/ folder)


Copy the two files src/test/resources/properties/ and /src/test/resources/properties/ to your HOME folder.

Optional: For screenshot previews to work you may have to edit and change the value of the last two properties : chrome.command and screenshot.temp.imagedir. Chrome(Chromium) must has to be installed for screenshot preview images.

Optional: For socks proxy mode to work optimal, add the host-name and IP for the server to the whitelist in

If there are errors when running a script, try change the permissions for the file ( etc). Linux: chmod +x


Solrwayback requires both Solr and Tomcat to be running.

Start tomcat: apache-tomcat-8.5.29/bin/
Stop tomcat: apache-tomcat-8.5.29/bin/
(For windows navigate to apache-tomcat-8.5.29/bin/ and type startup.bat or shutdown.bat)
To see Tomcat is running open: http://localhost:8080/solrwayback/
This is the search interface frontpage

Start solr: solrwayback_package/solr-7.5.0/bin/solr start
Stop solr: solrwayback_package/solr-7.5.0/bin/solr stop
(For windows navigate to solrwayback_package/solr-7.5.0/bin/ and type solr.cmd start or solr.cmd stop)
To see Solr is running open: http://localhost:8983/solr/#/netarchivebuilder


Solrwayback uses a Solr index of warc files and makes the archived webpages searchable and viewable.
If you do not have existing warc files, see steps below on harvesting with wget.

Creating an index: Copy arc/warc files into folder: /solrwayback_package/indexing/warcs
Start indexing: call indexing/
Indexing can take up to 10 minutes/GB files. After indexing, the warc-files must stay in the same folder for solrwayback to work.
Having whitespace characters in warc file names can result in pagepreviews and playback not working on some OS. There can be up to 5 minutes delay before the indexed files are visible from search. Visit this url after index job have finished to commit them instantly: http://localhost:8983/solr/netarchivebuilder/update?commit=true

Deleting an Index:
If you want to index a new collection into solr and remove the old index.

  1. stop solr
  2. delete the folder:
    (or rename to index1 etc, if you want to switch back later)
  3. start solr
  4. start the indexing script.

Faster indexing:
Copy and rename to . Also create a warcs1 folder. Edit the script and change the foldername from warcs to warcs1.
This way you can start two index jobs running at the same time. A powerful laptop can handle up to 4 simultaneous indexing processes. You can also just add more warc files to the index without having to index all content in the warc folder again.
Major solrwayback performance improvement for searching and playback by having the solrwayback_package folder on a SSD.


Solrwayback provides a search interface to explore the content of the warc files that have been indexed.
The basic query in solrwayback will return all documents in the index: *:*
Results can then be filtered by fields like Domain, Content Type Norm, Crawl Year, Status Code, Public Suffix (tld).
Advanced queries can be constructed using Boolean terms, and searching fields eg: AND title:"Aarhus University Library"

Additional features include:

  • Image search similar to google images
  • Search by uploading a file. (image/pdf etc.) See if the resource has been harvested and from where.
  • Link graph showing links (ingoing/outgoing) for domains using the D3 javascript framework.
  • Raw download of any harvested resource from the binary Arc/Warc file.
  • Export a search resultset to a Warc-file. Streaming download, no limit of size of resultset.
  • An optional built in SOCKS proxy can be used to view historical webpages without browser leaking resources from the live web. Configure browser to SOCKS version 4 to localhost port 9000 and open http://localhost:8080/solrwayback/

For more info on all additional features, see


How to do your own web harvest websites (Linux/MacOS only):
Using the wget command is an easy way to harvest websites compared to using Heritrix. The warc-files can then be indexed into SolrWayback.
Create a new folder since there will be several files written in this folder. Navigate to that folder in a prompt.
Create a text file call url_list.txt with one URL pr. line in that folder.
Type the following in a prompt:
wget --level=0 --warc-cdx --page-requisites --warc-file=warcfilename --warc-max-size=1G -i url_list.txt
(rename the warcfilename to your liking)
The script will harvest all pages in the url_list.txt file with all resources required for that page (images, css etc.) and be written to a warc file(s) called warcfilename.warc
Change --level=0 to --level=1 for following links. This will substantially increase the size of the warc file(s).


A search interface and wayback machine for the UKWA Solr based warc-indexer framework.




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