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Describe how custom transport could be defined in PPSPP URI #44

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Describe how custom transport could be defined in PPSPP URI #44

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10 changes: 9 additions & 1 deletion doc/content/url.md
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Expand Up @@ -17,7 +17,15 @@ simple structure has been used, based off a quick reading of
[Guidelines for new URL Schemes](https://tools.ietf.org/html/rfc2718) and
[URI Generic Syntax](https://tools.ietf.org/html/rfc3986).

- `scheme`: defines the protocol in use, always `ppspp`
- `scheme`: defines the protocol in use, by default `ppspp`. The PPSPP
specification declares protocol to be transport agnostic: it may use UDP or
SCTP or something else. While for now only UDP transport is defined as base
one, in future this may change. To handle PPSPP-over-Proto situations, custom
transport MUST be defined after `+` character, like: `ppspp+sctp` which reads
as "use PPSPP protocol over SCTP transport".
By default UDP protocol is assumed and MUST be used, while `ppspp+udp` is
still valid scheme.

- `authority`: the IP address and port `example.net:7777`
- `path`: the root hash in use, or requested filename `c89800bf` or `messier74.jpg`
- optional `query` string: supports passing swarm options such as: `content_integrity_protection_method=merkle_hash_tree &merkle_hash_tree_function=sha-256`
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