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README.txt in File Hash 7

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  1. 8 README.txt
FILE HASH
---------

Hashes of uploaded files, which can be found on a variety of sites from
archive.org to wikileaks.org, allow files to be uniquely identified, allow
duplicate files to be detected, and allow copies to be verified against the
original source.

File Hash module generates and stores MD5, SHA-1 and/or SHA-256 hashes for each
file uploaded to the site.

Hash algorithms can be enabled and disabled by the site administrator.

Hash values are loaded into the $file object where they are available to the
theme and other modules.

Handlers are provided for Views module compatibility. In addition, a
<media:hash> element is added for file attachments in node RSS feeds (file,
image, and media field types are supported).

Tokens are provided for the full hashes, as well as pairtree tokens useful for
content addressable storage. For example, if the MD5 hash for a file is
3998b02c5cd2723153c39701683a503b, you could store it in the files/39/98
directory using these tokens:
[file:filehash-md5-pair-1]/[file:filehash-md5-pair-2]. Note, to use these tokens
to configure the file upload directory, File Entity Paths module
(https://www.drupal.org/project/fe_paths) or File (Field) Paths module
(https://www.drupal.org/project/filefield_paths) is required.

A checkbox in File Hash settings allows duplicate uploaded files to be rejected.
This feature should be considered a proof-of-concept - you likely want better UX
for such a feature. Note, in Drupal 7, empty files are not considered duplicate
files, as such "files" may represent remote media assets, etc.

File

README.txt
View source 
  1. FILE HASH

  2. ---------

  3. 

  4. Hashes of uploaded files, which can be found on a variety of sites from

  5. archive.org to wikileaks.org, allow files to be uniquely identified, allow

  6. duplicate files to be detected, and allow copies to be verified against the

  7. original source.

  8. 

  9. File Hash module generates and stores MD5, SHA-1 and/or SHA-256 hashes for each

  10. file uploaded to the site.

  11. 

  12. Hash algorithms can be enabled and disabled by the site administrator.

  13. 

  14. Hash values are loaded into the $file object where they are available to the

  15. theme and other modules.

  16. 

  17. Handlers are provided for Views module compatibility. In addition, a

  18.  element is added for file attachments in node RSS feeds (file,

  19. image, and media field types are supported).

  20. 

  21. Tokens are provided for the full hashes, as well as pairtree tokens useful for

  22. content addressable storage. For example, if the MD5 hash for a file is

  23. 3998b02c5cd2723153c39701683a503b, you could store it in the files/39/98

  24. directory using these tokens:

  25. [file:filehash-md5-pair-1]/[file:filehash-md5-pair-2]. Note, to use these tokens

  26. to configure the file upload directory, File Entity Paths module

  27. (https://www.drupal.org/project/fe_paths) or File (Field) Paths module

  28. (https://www.drupal.org/project/filefield_paths) is required.

  29. 

  30. A checkbox in File Hash settings allows duplicate uploaded files to be rejected.

  31. This feature should be considered a proof-of-concept - you likely want better UX

  32. for such a feature. Note, in Drupal 7, empty files are not considered duplicate

  33. files, as such "files" may represent remote media assets, etc.