Package "tus"

Title:	TUS file transport protocol in prolog
Rating:	Not rated. Create the first rating!
Latest version:	0.0.14
SHA1 sum:	c4997740d7c1b6f46dd4fd0c8d45b9c6dcc574b3
Home page:	https://github.com/terminusdb/tus

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Details by download location

Version	SHA1	#Downloads	URL
0.0.14	99fcefc8230590bc9c4e7bc764c603e7986c2b44	18	https://github.com/terminusdb/tus.git
	068e00dfd17d5b00bcdb411947b8f254f7afafa0	1	https://github.com/terminusdb/tus.git
	c4997740d7c1b6f46dd4fd0c8d45b9c6dcc574b3	2	https://github.com/terminusdb/tus.git
0.0.13	0b352cffc1313c500c651516a8452dcb1d76c6b2	1	https://github.com/terminusdb/tus.git
0.0.10	0affa99d345550e08acc08c9952e6b10797606c9	79	https://github.com/terminusdb/tus.git
	4b73ec1b71d8c7922e4fe40bf98e62e8545f3ce3	3	https://github.com/terminusdb/tus.git
	f679b92a4bdd545841672a2ec5e5fdff4f102b44	2	https://github.com/terminusdb/tus.git
0.0.9	7f991a8ca618638864bfe0b752fcdcd654f97b97	6	https://github.com/terminusdb/tus.git
0.0.8	f2212b1b689b98950611bea5ce3a4b362a1d095d	12	https://github.com/terminusdb/tus.git
0.0.6	ce0762e5c165bf37c3359583b84601e176ab38b5	42	https://github.com/terminusdb/tus.git
	98a657b1e7aaa0bb58d0a019f6619b8771d7b9e7	54	https://github.com/terminusdb/tus.git
	55471d5817aa86b85d315482943c88e5d188f220	4	https://github.com/terminusdb/tus.git
	b759f5e6b59b1369a7d56220852c7cc487c05120	32	https://github.com/terminusdb/tus.git
0.0.3	f33806d839b8e68c0ac21f931aa508b0040baba6	1	https://github.com/terminusdb/tus.git
0.0.2	0f06b903b6b4e1bee5ba64f3cd70d87b27ece2f8	4	https://github.com/terminusdb/tus.git
	d844f62711ebe46101cd0e7db262f81c6dbe1898	1	https://github.com/terminusdb/tus.git

TUS in swipl

TUS protocol for resumable file uploads via HTTP in swipl (see: TUS)

This package implements both the server handlers and a simple client.

The package implements the core protocol along with four extensions:

• Creation
• Expiration
• Checksum
• Termination

Options

Options for the server can be set with the set_tus_options/1 predicate which has the following options:

• tus_storage_path(Path): The Path contains the location of the storage folder to be used for uploads. If not set it will default to a temporary directory.
• tus_max_size(Size): The Size is the maximum allowable upload size in bytes. Defaults to 17_179_869_184 bytes.
• tus_client_chunk_size(Size): The Size is the size of chunks to be uploaded. The default is 16_777_216 bytes.
• tus_expiry_seconds(Seconds): The Seconds is the total number of seconds before the resource expires. This will allow resources which are not fully uploaded to be removed.

  For instance, to set a larger client chunk size one can call:

  :- set_tus_options([tus_client_chunk_size(33_554_432)]).

Examples

Server

To use the TUS server with the HTTP library in swipl you can simply add a tus_dispatch call to your http_handler from a chosen endpoint as follows:

:- http_handler(root(files), tus_dispatch,
                [ methods([options,head,post,patch,delete]),
                  prefix
                ]).

In order to determine the location of a given resource when passed the resource URL in other contexts you can use the utility predicate tus_uri_resource(URI, Resource) together with tus_resource_path(Resource, Resource_Path). In this way once a client has uploaded a resource it can be referred to in client-server communications, and be moved, modified or manipulated by server code.

Domains and Authorization in Server

The server does not manage authorization, but it is possible to use authorization to provide isolation of user data by providing the tus_dispatch/2 predicate with options which include [domain(Domain)].

You can use any authorization system you'd like (basic, JWT etc.) to guard access to this domain token and the domain token will be used to ensure isolation.

The following code shows how you might add a handler which carries with it a domain after authorization. There is a more complete example in the tests in prolog/tus.pl.

:- meta_predicate auth_wrapper(2,?).
auth_wrapper(Goal,Request) :-
    authorize(Request, Domain),
    call(Goal, [domain(Domain)], Request).

spawn_auth_server(URL, Port) :-
    random_between(49152, 65535, Port),
    http_server(http_dispatch, [port(Port), workers(1)]),
    http_handler(root(files), auth_wrapper(tus_dispatch),
                 [ methods([options,head,post,patch,delete]),
                   prefix
                 ]),
    format(atom(URL), 'http://127.0.0.1:~d/files', [Port]).

Client

The client invocation requires only the endpoint of interest and a file and can be invoked thus:

tus_upload(Example, URL, Resource)

The Resource variable gives back a resource handle that the server can use to refer to the resource in subsequent communication.

TODO

The remaining extensions would be desirable:

• Creation with Upload
• Concatenation In addition the Creation extension should be checked from the Options call before initiating an upload.

Copyright

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Contents of pack "tus"

Pack contains 7 files holding a total of 57.6K bytes.