GSP
Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Support
Contact Us
Online Help
Handbooks
Domain Status
Man Pages

FAQ
Virtual Servers
Pricing
Billing
Technical

Network
Facilities
Connectivity
Topology Map

Miscellaneous
Server Agreement
Year 2038
Credits
 

USA Flag

 

 

Man Pages
Dancer2::Serializer::Mutable(3) User Contributed Perl Documentation Dancer2::Serializer::Mutable(3)

Dancer2::Serializer::Mutable - Serialize and deserialize content based on HTTP header

version 0.400000

    # in config.yml
    serializer: Mutable

    engines:
        serializer:
            Mutable:
                mapping:
                    'text/x-yaml'        : YAML
                    'text/html'          : YAML
                    'text/x-data-dumper' : Dumper
                    'text/x-json'        : JSON
                    'application/json'   : JSON

    # in the app
    put '/something' => sub {
        # deserialized from request
        my $name = param( 'name' );

        ...

        # will be serialized to the most
        # fitting format
        return { message => "user $name added" };
    };

This serializer will try find the best (de)serializer for a given request. For this, it will pick the first valid content type found from the following list and use its related serializer.
  • The content_type from the request headers
  • the accept from the request headers
  • The default is application/json

The content-type/serializer mapping that "Dancer2::Serializer::Mutable" uses is

    serializer                  | content types
    ----------------------------------------------------------
    Dancer2::Serializer::YAML   | text/x-yaml, text/html
    Dancer2::Serializer::Dumper | text/x-data-dumper
    Dancer2::Serializer::JSON   | text/x-json, application/json

A different mapping can be provided via the config file. For example, the default mapping would be configured as

    engines:
        serializer:
            Mutable:
                mapping:
                    'text/x-yaml'        : YAML
                    'text/html'          : YAML
                    'text/x-data-dumper' : Dumper
                    'text/x-json'        : JSON
                    'application/json'   : JSON

The keys of the mapping are the content-types to serialize, and the values the serializers to use. Serialization for "YAML", "Dumper" and "JSON" are done using internal Dancer mechanisms. Any other serializer will be taken to be as Dancer2 serialization class (minus the "Dancer2::Serializer::" prefix) and an instance of it will be used to serialize/deserialize data. For example, adding Dancer2::Serializer::XML to the mapping would be:

    engines:
        serializer:
            Mutable:
                mapping:
                    'text/x-yaml'        : YAML
                    'text/html'          : YAML
                    'text/x-data-dumper' : Dumper
                    'text/x-json'        : JSON
                    'text/xml'           : XML

The following methods are used internally by "Dancer2" and are not made accessible via the DSL.

Serialize a data structure. The format it is serialized to is determined automatically as described above. It can be one of YAML, Dumper, JSON, defaulting to JSON if there's no clear preference from the request.

Deserialize the provided serialized data to a data structure. The type of serialization format depends on the request's content-type. For now, it can be one of YAML, Dumper, JSON.

Returns the content-type that was used during the last "serialize" / "deserialize" call. WARNING : you must call "serialize" / "deserialize" before calling "content_type". Otherwise the return value will be "undef".

Dancer Core Developers

This software is copyright (c) 2022 by Alexis Sukrieh.

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

2022-03-14 perl v5.32.1

Search for    or go to Top of page |  Section 3 |  Main Index

Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with ManDoc.