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NAME ^

Riap::Simple - Simple Riap protocol over any stream socket

VERSION ^

This document describes version 1.2.2 of Riap::Simple (from Perl distribution Riap), released on 2014-10-30.

SYNOPSIS ^

This document specifies a simple Riap protocol over any stream socket like TCP, Unix, or piping to program.

DESCRIPTION ^

Riap::Simple is a simpler alternative to Riap::HTTP. It supports less features (currently only supports sending/receiving Riap request and response in JSON encoding, no encryption, no authentication, no sending of logging messages). It is suitable for localhost/localnet communication (e.g. between processes of different languages). For public-facing service, Riap::HTTP is more recommended.

Riap::Simple does not support Rinci's input/output stream.

Request

Client first sends a request line of the following format:

 "J" <size> <CRLF>

That is, the uppercase letter J (for JSON) and size of subsequent request body in bytes. Client then sends the Riap request in JSON, followed by CRLF.

Alternatively, client can also send the whole request in a single line, for shorter requests:

 "j" <JSON> <CRLF>

That is, the lowercase letter j followed by JSON data, followed by CRLF. In this format, the JSON data cannot contain newlines.

Response

Server replies by first sending a similar line:

 "J" <size> <CRLF>

followed by enveloped result encoded in JSON and a single <CRLF>. The next request can then be sent by client.

If client/server sends an invalid request/response line, the connection can be closed.

PROTOCOL VERSION ^

 1.2

EXAMPLES ^

Below are some examples of what is sent and received on the wire.

 J9
 {"v":0.9}
 J40
 [501,"Protocol version not implemented"]

 J1
 {
 J20
 [400,"Invalid JSON"]

 J57
 {"action":"call","uri":"/Math/mult","args":{"a":2,"b":3}}
 J12
 [200,"OK",6]

 j{"v":1.2,"action":"call","uri":"/Math/mult","args":{"a":2,"b":4}}
 J27
 [200,"OK",8,{"riap.v":1.2}]

 J44
 {"v":1.1,"action":"info","uri":"/Math/mult"}
 J49
 [200,"OK",{"type":"function","uri":"/Math/mult"}]

An example of sending and returning binary data (Riap v1.2 only):

 j{"v":1.2,"action":"call","uri":"/bitflip","args":{"data:base64":"AAAA"}}
 J64
 [200,"OK","////",{"riap.v":1.2,"riap.result_encoding":"base64"}]

The example belows shows calling a function that bit-flips 0x000000 into 0xffffff.

FAQ ^

SEE ALSO ^

Riap, Riap::HTTP

HOMEPAGE ^

Please visit the project's homepage at https://metacpan.org/release/Riap.

SOURCE ^

Source repository is at https://github.com/perlancar/perl-Riap.

BUGS ^

Please report any bugs or feature requests on the bugtracker website https://rt.cpan.org/Public/Dist/Display.html?Name=Riap

When submitting a bug or request, please include a test-file or a patch to an existing test-file that illustrates the bug or desired feature.

AUTHOR ^

perlancar <perlancar@cpan.org>

COPYRIGHT AND LICENSE ^

This software is copyright (c) 2014 by perlancar@cpan.org.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

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