Difference between revisions of "The WARC Ecosystem"
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Everything about the WARC format and the tools that support it. | Everything about the WARC format and the tools that support it. | ||
WARC is a file format for accurately storing Web traffic. | |||
== Information == | == Information == | ||
* [[wikipedia:Web_ARChive]] | * [[wikipedia:Web_ARChive]] | ||
* {{ | * {{URL|https://webarchive.jira.com/wiki/pages/viewpage.action?pageId=4817}} - Contains examples of WARC records | ||
* {{ | * {{URL|http://bibnum.bnf.fr/WARC/|The WARC File Format (ISO 28500) - Information, Maintenance, Drafts}} | ||
* {{ | * {{URL|http://archive-access.sourceforge.net/warc/}} - WARC ISO docs | ||
* {{ | * {{URL|https://www.loc.gov/preservation/digital/formats/fdd/fdd000236.shtml}} | ||
* {{ | * {{URL|https://netpreserve.org/resources/warc-implementation-guidelines-v1/}} | ||
* {{ | * {{URL|https://netpreserve.org/resources/WARC_Guidelines_v1.pdf}} | ||
* {{ | * {{URL|https://commoncrawl.org/2014/04/navigating-the-warc-file-format/}} | ||
* {{ | * {{URL|https://www.taricorp.net/2016/web-history-warc}} | ||
* {{URL|https://iipc.github.io/warc-specifications/specifications/warc-format/warc-1.0/|WARC/1.0 specification}} | |||
* {{URL|https://iipc.github.io/warc-specifications/specifications/warc-format/warc-1.1/|WARC/1.1 specification}} | |||
* {{URL|https://github.com/iipc/warc-specifications|GitHub repository coordinating the specification}} | |||
== Tools == | == Tools == | ||
{|class="wikitable" | {|class="wikitable" | ||
! | ! Name | ||
! | ! License | ||
! | ! Language | ||
! | ! Testing | ||
! | ! Documentation | ||
! | ! Author count | ||
! | ! Description | ||
|- | |- | ||
| [https://www.gnu.org/software/wget/ wget v1.14+] | | [https://www.gnu.org/software/wget/ wget v1.14+] | ||
Line 32: | Line 37: | ||
|- | |- | ||
| InternetArchive's [https://github.com/internetarchive/warc warc python library] | | InternetArchive's [https://github.com/internetarchive/warc warc python library] | ||
| GPL v2 || Python | | GPL v2 || Python 2 | ||
| looks to have a test suite - https://github.com/internetarchive/warc/blob/master/warc/tests/test_warc.py | | looks to have a test suite - https://github.com/internetarchive/warc/blob/master/warc/tests/test_warc.py | ||
| | | README with examples online at https://warc.readthedocs.io/en/latest/ | ||
| 3 commiters on github | | 3 commiters on github | ||
| library to work with WARC files | | library to work with WARC files | ||
Line 41: | Line 46: | ||
| ISC || Python | | ISC || Python | ||
| Not enough tests | | Not enough tests | ||
| | | README + [https://scrapy.org/ Scrapy docs] | ||
| 1 author | | 1 author | ||
| Mirrors websites and saves the results to a WARC file | | Mirrors websites and saves the results to a WARC file | ||
Line 48: | Line 53: | ||
| ISC || Python | | ISC || Python | ||
| NO TEST SUITE | | NO TEST SUITE | ||
| | | README | ||
| 1 author | | 1 author | ||
| a simple HTTP proxy that saves all HTTP traffic to a file | | a simple HTTP proxy that saves all HTTP traffic to a file | ||
Line 56: | Line 61: | ||
| Python | | Python | ||
| NO TEST SUITE | | NO TEST SUITE | ||
| | | README | ||
| 1 author | | 1 author | ||
| HTTPS proxy that saves traffic to a WARC file | | HTTPS proxy that saves traffic to a WARC file | ||
|- | |- | ||
| [https://github.com/internetarchive/warctools | | [https://github.com/internetarchive/warctools warc-tools] | ||
| MIT License | | MIT License | ||
| Python 2.6 | | Python 2.6 | ||
| NO TEST SUITE | | NO TEST SUITE | ||
| | | README | ||
| 4 commiters | | 4 commiters | ||
| warc validator, dump, search, index, convert arc to warc | | warc validator, dump, search, index, convert arc to warc | ||
The previous versions can be found at https://code.google.com/p/warc-tools/ and | The previous versions can be found at https://code.google.com/p/warc-tools/ and https://bitbucket.org/hanzo/warc-tools | ||
|- | |- | ||
| [https://github.com/alard/warc-proxy WARC viewer] | | [https://github.com/alard/warc-proxy WARC viewer] | ||
Line 77: | Line 79: | ||
| Python | | Python | ||
| NO TEST SUITE | | NO TEST SUITE | ||
| | | README | ||
| 1 author | | 1 author | ||
| WARC viewer for browsing the contents of a WARC file. | | WARC viewer for browsing the contents of a WARC file. | ||
Line 85: | Line 87: | ||
| Python | | Python | ||
| NO TEST SUITE | | NO TEST SUITE | ||
| | | README | ||
| 1 author | | 1 author | ||
| Merge many small warcs into a large one | | Merge many small warcs into a large one | ||
Line 93: | Line 95: | ||
| [https://github.com/alard/warctozip-service warc to zip] | | [https://github.com/alard/warctozip-service warc to zip] | ||
| no license information | | no license information | ||
| | | Python | ||
| NO TEST SUITE | | NO TEST SUITE | ||
| | | README | ||
| 1 author | | 1 author | ||
| An HTTP-based warc-to-zip converter | | An HTTP-based warc-to-zip converter | ||
Line 103: | Line 105: | ||
| Python 3 | | Python 3 | ||
| yes | | yes | ||
| | | README | ||
| 1 author | | 1 author | ||
| warcat concat, extract, list, pass, split, verify warc files | | warcat concat, extract, list, pass, split, verify warc files | ||
Line 118: | Line 120: | ||
| Bash shell scripting | | Bash shell scripting | ||
| NO TEST SUITE | | NO TEST SUITE | ||
| | | README | ||
| 1 author | | 1 author | ||
| Generates 50gb warc files from existing warc files | | Generates 50gb warc files from existing warc files | ||
Uploads to archive.org | Uploads to archive.org | ||
|- | |- | ||
| [https://github.com/rajbot/CDX-Writer CDX Writer] | | [https://github.com/rajbot/CDX-Writer CDX Writer] | ||
| | | AGPL v3 | ||
| | | Python | ||
| Has a test suite | | Has a test suite | ||
| | | README | ||
| 1 author | | 1 author | ||
| Create CDX index files from WARC files. | | Create CDX index files from WARC files. | ||
|- | |- | ||
| [https://webarchive.jira.com/wiki/ | | [https://webarchive.jira.com/wiki/spaces/Heritrix/overview Heritrix] | ||
| Apache v2.0 | | Apache v2.0 | ||
| | | Java | ||
| Has a test suite | | Has a test suite | ||
| javadoc, website | | javadoc, website | ||
Line 141: | Line 142: | ||
|- | |- | ||
| [https://github.com/openplaces/heritrix-cassandra Heritrix-Cassandra] | | [https://github.com/openplaces/heritrix-cassandra Heritrix-Cassandra] | ||
| | | LGPL v2.1 || ? || ? || ? || ? | ||
| A library for writing Heritrix 3 output directly to Cassandra as records. | | A library for writing Heritrix 3 output directly to Cassandra as records. | ||
|- | |- | ||
| [ | | [https://landsbokasafn.github.io/DeDuplicator/ DeDuplicator (Heritrix add-on)] | ||
| | | LGPL v2.1 | ||
| Java | |||
| Very few tests | |||
| [https://landsbokasafn.github.io/DeDuplicator/started.html Getting Started] page. | |||
| 1 author | |||
| The DeDuplicator is an add-on module (plug-in) for the web crawler Heritrix. It offers a means to reduce the amount of duplicate data collected in a series of snapshot crawls. | | The DeDuplicator is an add-on module (plug-in) for the web crawler Heritrix. It offers a means to reduce the amount of duplicate data collected in a series of snapshot crawls. | ||
|- | |- | ||
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| A simple wrapper around the Heritrix 3.x API. Developed in April 2012 against Heritrix 3.1.0 at GWU Libraries in Washington, DC, USA. | | A simple wrapper around the Heritrix 3.x API. Developed in April 2012 against Heritrix 3.1.0 at GWU Libraries in Washington, DC, USA. | ||
|- | |- | ||
| [ | | [https://warcreate.com/ WARCreate (Chrome/Chromium extension)] | ||
| | | MIT | ||
| | | JavaScript | ||
| ??? | | ??? | ||
| none | | none | ||
| 1 author | | 1 author | ||
| WARCreate is a Google Chrome extension that allows a user to create a | | WARCreate is a Google Chrome extension that allows a user to create a WARC file from any browseable webpage. [https://github.com/machawk1/warcreate code repo] | ||
|- | |- | ||
| [https://sbforge.org/display/JWAT/JWAT Java Web Archive Toolkit] | | [https://sbforge.org/display/JWAT/JWAT Java Web Archive Toolkit] | ||
Line 170: | Line 175: | ||
[https://bitbucket.org/nclarkekb/jwat/overview code repo] | [https://bitbucket.org/nclarkekb/jwat/overview code repo] | ||
|- | |- | ||
| [ | | [https://machawk1.github.io/wail/ Web Archiving Integration Layer (WAIL)] | ||
| | | MIT | ||
| Python | | Python | ||
| ??? | | ??? | ||
| Online | | Online | ||
| 1 | | 1 author | ||
| Web Archiving Integration Layer (WAIL) is a graphical user interface (GUI) atop multiple web archiving tools intended to be used as an easy way for anyone to preserve and replay web pages. | | Web Archiving Integration Layer (WAIL) is a graphical user interface (GUI) atop multiple web archiving tools intended to be used as an easy way for anyone to preserve and replay web pages. | ||
Tools included and accessible through the GUI are Heritrix 3. | Tools included and accessible through the GUI are Heritrix 3.2.0 and OpenWayback 2.4.0. | ||
[https://github.com/machawk1/wail code repo] | [https://github.com/machawk1/wail code repo] | ||
Line 187: | Line 192: | ||
| ? | | ? | ||
| 1 author | | 1 author | ||
CDX support | |CDX support | ||
Another independent WARC library for Python. | |||
|- | |- | ||
| [https://github.com/ | | [https://github.com/ArchiveTeam/wpull Wpull] | ||
| GPL | | GPL v3 | ||
| Python 3 | | Python 3 | ||
| many unit tests (Travis CI registered), simple experimental fuzzer | | many unit tests (Travis CI registered), simple experimental fuzzer | ||
| a quick start | | a quick start README, brief usage overview, good docstrings coverage | ||
| 1 core author | | 1 core author | ||
| Wget-compatible web downloader. | | Wget-compatible web downloader. | ||
Beta quality. Lua/Python scripting. PhantomJS (experimental). Used by [[ArchiveBot]]. | Beta quality. Lua/Python scripting. PhantomJS (experimental). Used by [[ArchiveBot]]. | ||
|- | |- | ||
| [https://github.com/ | | [https://github.com/ArchiveTeam/grab-site grab-site] | ||
| MIT | | MIT | ||
| Python 3 | | Python 3 | ||
| no | | no | ||
| | | README | ||
| 1 core author | | 1 core author | ||
| wpull launcher with the dashboard and ignore patterns from ArchiveBot | | wpull launcher with the dashboard and ignore patterns from ArchiveBot | ||
|- | |- | ||
| [https://github.com/ikreymer/pywb pywb] | | [https://github.com/ikreymer/pywb pywb] | ||
| GPL | | GPL v3 | ||
| Python 2 | | Python 2 | ||
| yes | | yes | ||
| | | README and wiki | ||
| 1 core author | | 1 core author | ||
| A full-fledged Python reimplementation of Wayback Machine web archive replay capabilities. Also provides a live rewriting proxy. | | A full-fledged Python reimplementation of Wayback Machine web archive replay capabilities. Also provides a live rewriting proxy. | ||
|- | |- | ||
| [https://github.com/helgeho/ArchiveSpark ArchiveSpark] | | [https://github.com/helgeho/ArchiveSpark ArchiveSpark] | ||
Line 249: | Line 228: | ||
| Apache Spark framework that facilitates access to Web Archives | | Apache Spark framework that facilitates access to Web Archives | ||
|- | |- | ||
! | | [https://github.com/webrecorder/webrecorder-player Webrecorder Player] | ||
! | | Apache License 2.0 | ||
! | | JavaScript | ||
! | | ? | ||
! | | ? | ||
! | | ? | ||
! | | Desktop app for viewing high-fidelity web archives (WARC, HAR and ARC) on a local machine, no internet connection required. Particularly useful for social media, dynamic content. Supports OSX, Windows and Linux (experimental). Related to https://webrecorder.io/ | ||
|- | |||
| [https://github.com/webrecorder/warcio warcio] | |||
| Apache 2.0 | |||
| Python 2.7+/3.4+ | |||
| yes | |||
| README | |||
| 14 contributors | |||
| WARC writer library | |||
|- | |||
| [https://github.com/internetarchive/warcprox warcprox] | |||
| GPL v2+ || Python 3.4+ | |||
| yes | |||
| README | |||
| 1 core author, 14 contributors | |||
| MITM proxy for capturing to WARC. See also [https://github.com/internetarchive/brozzler brozzler], a crawler based on headless Chromium and warcprox. | |||
|- | |||
! Name | |||
! License | |||
! Language | |||
! Testing | |||
! Documentation | |||
! Author count | |||
! Description | |||
|} | |} | ||
== Deprecated == | == Deprecated == | ||
* https://github.com/internetarchive/archive-commons - split into 2 new repos: ia-web-commons & ia-hadoop-tools | * https://github.com/internetarchive/archive-commons - split into 2 new repos: ia-web-commons & ia-hadoop-tools | ||
* https://github.com/ikreymer/pywb-webrecorder | |||
* https://code.google.com/p/warc-tools/ | |||
* https://github.com/lintool/warcbase | |||
* [https://github.com/ikreymer/webarchiveplayer WebArchivePlayer] | |||
== The WARC format == | == The WARC format == | ||
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=== WARC content block === | === WARC content block === | ||
Part (zero or more octets) of a WARC record that follows the header and that forms the main body of a | Part (zero or more octets) of a WARC record that follows the header and that forms the main body of a WARC record. | ||
WARC record. | |||
== ArchiveBot job output == | |||
The [[ArchiveBot]] produces three types of files: | |||
; .meta.warc.gz : The log of the job, listing all the files requested and downloaded, as well as any errors. | |||
; .json : Some brief metadata about the job. | |||
; -0000.warc.gz, -0001.warc.gz, ... : The actual requests and responses, in full. | |||
== CDX File Format == | == CDX File Format == | ||
* | * https://archive.org/web/researcher/cdx_legend.php | ||
* https://github.com/internetarchive/wayback/tree/master/wayback-cdx-server -- How to query IA's CDX server | * https://github.com/internetarchive/wayback/tree/master/wayback-cdx-server -- How to query IA's CDX server | ||
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Example of getting a list of all the URLs in the Wayback Machine with a given prefix: | Example of getting a list of all the URLs in the Wayback Machine with a given prefix: | ||
curl ' | curl 'https://web.archive.org/cdx/search/cdx?fl=statuscode,timestamp,original&collapse=urlkey&matchType=prefix&url=http://www.conchord.org' | ||
[[Category:Tools]] | [[Category:Tools]] | ||
{{Navigation box}} | {{Navigation box}} |
Revision as of 00:48, 13 March 2021
Everything about the WARC format and the tools that support it.
WARC is a file format for accurately storing Web traffic.
Information
- wikipedia:Web_ARChive
- Example[IA•Wcite•.today•MemWeb]URL not specified; if the URL contains an = please prefix it with 1= so it is not treated as a named template parameter - Contains examples of WARC records
- The WARC File Format (ISO 28500) - Information, Maintenance, Drafts[IA•Wcite•.today•MemWeb]
- http://archive-access.sourceforge.net/warc/[IA•Wcite•.today•MemWeb] - WARC ISO docs
- https://www.loc.gov/preservation/digital/formats/fdd/fdd000236.shtml[IA•Wcite•.today•MemWeb]
- https://netpreserve.org/resources/warc-implementation-guidelines-v1/[IA•Wcite•.today•MemWeb]
- https://netpreserve.org/resources/WARC_Guidelines_v1.pdf[IA•Wcite•.today•MemWeb]
- https://commoncrawl.org/2014/04/navigating-the-warc-file-format/[IA•Wcite•.today•MemWeb]
- https://www.taricorp.net/2016/web-history-warc[IA•Wcite•.today•MemWeb]
- WARC/1.0 specification[IA•Wcite•.today•MemWeb]
- WARC/1.1 specification[IA•Wcite•.today•MemWeb]
- GitHub repository coordinating the specification[IA•Wcite•.today•MemWeb]
Tools
Name | License | Language | Testing | Documentation | Author count | Description |
---|---|---|---|---|---|---|
wget v1.14+ | GPL v3+ | C | Has a test suite but does not test any warc functionality | Man pages, website, blog posts all over the net | 2+ according to the changelog | A non-interactive network downloader. wget also generates duplicate record ids in warc files.
More information about flags can be found on the Wget with WARC output page. |
InternetArchive's warc python library | GPL v2 | Python 2 | looks to have a test suite - https://github.com/internetarchive/warc/blob/master/warc/tests/test_warc.py | README with examples online at https://warc.readthedocs.io/en/latest/ | 3 commiters on github | library to work with WARC files |
WarcMiddleware | ISC | Python | Not enough tests | README + Scrapy docs | 1 author | Mirrors websites and saves the results to a WARC file |
WarcProxy | ISC | Python | NO TEST SUITE | README | 1 author | a simple HTTP proxy that saves all HTTP traffic to a file |
WarcMITMProxy | ISC | Python | NO TEST SUITE | README | 1 author | HTTPS proxy that saves traffic to a WARC file |
warc-tools | MIT License | Python 2.6 | NO TEST SUITE | README | 4 commiters | warc validator, dump, search, index, convert arc to warc
The previous versions can be found at https://code.google.com/p/warc-tools/ and https://bitbucket.org/hanzo/warc-tools |
WARC viewer | no license information | Python | NO TEST SUITE | README | 1 author | WARC viewer for browsing the contents of a WARC file. |
Megawarc | no license information | Python | NO TEST SUITE | README | 1 author | Merge many small warcs into a large one
Checks if WARC files can be un-gzipped before adding them to the megawarc. Does not check anything else. |
warc to zip | no license information | Python | NO TEST SUITE | README | 1 author | An HTTP-based warc-to-zip converter |
warcat | GPL v3 | Python 3 | yes | README | 1 author | warcat concat, extract, list, pass, split, verify warc files
Install: pip-3 install warcat https://github.com/internetarchive/ia-web-commons https://github.com/internetarchive/ia-hadoop-tools |
Archive Team megawarc factory | no license information | Bash shell scripting | NO TEST SUITE | README | 1 author | Generates 50gb warc files from existing warc files
Uploads to archive.org |
CDX Writer | AGPL v3 | Python | Has a test suite | README | 1 author | Create CDX index files from WARC files. |
Heritrix | Apache v2.0 | Java | Has a test suite | javadoc, website | many authors | Heritrix is the Internet Archive's open-source, extensible, web-scale, archival-quality web crawler project. |
Heritrix-Cassandra | LGPL v2.1 | ? | ? | ? | ? | A library for writing Heritrix 3 output directly to Cassandra as records. |
DeDuplicator (Heritrix add-on) | LGPL v2.1 | Java | Very few tests | Getting Started page. | 1 author | The DeDuplicator is an add-on module (plug-in) for the web crawler Heritrix. It offers a means to reduce the amount of duplicate data collected in a series of snapshot crawls. |
python-heritrix | ? | ? | ? | ? | ? | A simple wrapper around the Heritrix 3.x API. Developed in April 2012 against Heritrix 3.1.0 at GWU Libraries in Washington, DC, USA. |
WARCreate (Chrome/Chromium extension) | MIT | JavaScript | ??? | none | 1 author | WARCreate is a Google Chrome extension that allows a user to create a WARC file from any browseable webpage. code repo |
Java Web Archive Toolkit | Apache 2.0 | Java | Partial Test Suite (check coverage profile) | Online | 1 author | jwattools arc2warc, cdx, compress, decompress, extract, interval, pathindex, test, unpack |
Web Archiving Integration Layer (WAIL) | MIT | Python | ??? | Online | 1 author | Web Archiving Integration Layer (WAIL) is a graphical user interface (GUI) atop multiple web archiving tools intended to be used as an easy way for anyone to preserve and replay web pages.
Tools included and accessible through the GUI are Heritrix 3.2.0 and OpenWayback 2.4.0. |
pylibwarc | ISC License | Python | ? | ? | 1 author | CDX support
Another independent WARC library for Python. |
Wpull | GPL v3 | Python 3 | many unit tests (Travis CI registered), simple experimental fuzzer | a quick start README, brief usage overview, good docstrings coverage | 1 core author | Wget-compatible web downloader.
Beta quality. Lua/Python scripting. PhantomJS (experimental). Used by ArchiveBot. |
grab-site | MIT | Python 3 | no | README | 1 core author | wpull launcher with the dashboard and ignore patterns from ArchiveBot |
pywb | GPL v3 | Python 2 | yes | README and wiki | 1 core author | A full-fledged Python reimplementation of Wayback Machine web archive replay capabilities. Also provides a live rewriting proxy. |
ArchiveSpark | MIT License | Scala | ? | ? | 2 authors | Apache Spark framework that facilitates access to Web Archives |
Webrecorder Player | Apache License 2.0 | JavaScript | ? | ? | ? | Desktop app for viewing high-fidelity web archives (WARC, HAR and ARC) on a local machine, no internet connection required. Particularly useful for social media, dynamic content. Supports OSX, Windows and Linux (experimental). Related to https://webrecorder.io/ |
warcio | Apache 2.0 | Python 2.7+/3.4+ | yes | README | 14 contributors | WARC writer library |
warcprox | GPL v2+ | Python 3.4+ | yes | README | 1 core author, 14 contributors | MITM proxy for capturing to WARC. See also brozzler, a crawler based on headless Chromium and warcprox. |
Name | License | Language | Testing | Documentation | Author count | Description |
Deprecated
- https://github.com/internetarchive/archive-commons - split into 2 new repos: ia-web-commons & ia-hadoop-tools
- https://github.com/ikreymer/pywb-webrecorder
- https://code.google.com/p/warc-tools/
- https://github.com/lintool/warcbase
- WebArchivePlayer
The WARC format
A .warc file is usually a group of one or more WARC records. The first record usually describes the records to follow.
Compression is optional. If used, each record is compressed via gzip. A gzip file supports multiple "members"; compressed warcs end in .warc.gz. According to the guidelines, WARC files should top out at 1 gb.
WARC record
- header
- content block
- two newlines
WARC record header
The beginning of a WARC record, consisting of one first line declaring the record to be in the WARC format with a given version number, followed by lines of named fields up to a blank line. The WARC record header format largely follows the tradition of HTTP/1.1 [RFC2616] and [RFC2822] headers, with one major exception, allowing UTF-8 [RFC3629].
Example of a 'request' record header:
WARC/1.0 WARC-Type: request WARC-Target-URI: http://xbox.gamespy.com/ Content-Type: application/http;msgtype=request WARC-Date: 2013-04-02T16:12:40Z WARC-Record-ID: <urn:uuid:08d9edb9-0ab8-4352-ba56-6cbbd590f34f> WARC-IP-Address: 213.248.112.146 WARC-Warcinfo-ID: <urn:uuid:2b6ad3f1-efab-4e37-8faa-fc8ad112692f> WARC-Block-Digest: sha1:T6PJSZTTP7HBNA6OFZACXAFK25GGLVT4 Content-Length: 150
WARC named fields
- A set of elements consisting of a name, a colon, and a value, with long values continued on indented lines.
- Named fields may appear in any order.
- Field values may contain any UTF-8 character.
- The 'encoded-word' mechanism of [RFC2047] may also be used when writing WARC fields and shall also be understood by WARC reading software.
Defined field names
- WARC-Type
- required, can be one of 'warcinfo', 'response', 'resource', 'request', 'metadata', 'revisit', 'conversion', or 'continuation'
- WARC-Record-ID
- required, unique ID, as a URI
- WARC-Date
- required
- Content-Length
- required
- Content-Type
- mime type
- WARC-Concurrent-To
- repeatable, WARC-Record-IDs associated with this one
- WARC-Block-Digest
- optional, hash of the whole record
- WARC-Payload-Digest
- optional, hash of the just the payload
- WARC-IP-Address
- where the record was gotten from
- WARC-Refers-To
- previous WARC-Record-ID this relates to
- WARC-Target-URI
- the URL asked for
- WARC-Truncated
- why only part of the content was gotten
- WARC-Warcinfo-ID
- WARC-Record-ID of the associated high-level metadata record
- WARC-Filename
- warcinfo only, the expected name of the file containing this record
- WARC-Profile
- revisit only, the way revisiting was handled, as a URI
- WARC-Identified-Payload-Type
- a independently verified mime type of the payload (i.e. not just what it claims to be)
- WARC-Segment-Origin-ID
- continuation only
- WARC-Segment-Number
- WARC-Segment-Total-Length
- continuation only
WARC content block
Part (zero or more octets) of a WARC record that follows the header and that forms the main body of a WARC record.
ArchiveBot job output
The ArchiveBot produces three types of files:
- .meta.warc.gz
- The log of the job, listing all the files requested and downloaded, as well as any errors.
- .json
- Some brief metadata about the job.
- -0000.warc.gz, -0001.warc.gz, ...
- The actual requests and responses, in full.
CDX File Format
- https://archive.org/web/researcher/cdx_legend.php
- https://github.com/internetarchive/wayback/tree/master/wayback-cdx-server -- How to query IA's CDX server
Example of generating a list of URLs in a MegaWARC:
curl -sL 'https://archive.org/download/archiveteam_zapd_20131016071259/zapd_20131016071259.megawarc.warc.os.cdx.gz' \ | gunzip -c | cut -f3 -d' '
Example of getting a list of all the URLs in the Wayback Machine with a given prefix:
curl 'https://web.archive.org/cdx/search/cdx?fl=statuscode,timestamp,original&collapse=urlkey&matchType=prefix&url=http://www.conchord.org'