# NAME Dancer::Plugin::Swagger - create Swagger documentation of the app REST interface # VERSION version 0.2.1 # SYNOPSIS ```perl package MyApp; use Dancer; use Dancer::Plugin::Swagger; our $VERSION = "0.1"; get '/choreograph/:name' => sub { ... }; 1; ``` # DESCRIPTION This plugin provides tools to create and access a [Swagger](http://swagger.io/) specification file for a Dancer REST web service. Overview of `Dancer::Plugin::Swagger`'s features: - Can create a `/swagger.json` REST specification file. - Can auto-discover routes and add them to the swagger file. - Can provide a Swagger UI version of the swagger documentation. # CONFIGURATION ``` plugins: Swagger: main_api_module: MyApp show_ui: 1 ui_url: /doc ui_dir: /path/to/files auto_discover_skip: - /swagger.json - qr#^/doc/# ``` ## main\_api\_module If not provided explicitly, the Swagger document's title and version will be set to the abstract and version of this module. Defaults to the first module to import [Dancer::Plugin::Swagger](https://metacpan.org/pod/Dancer::Plugin::Swagger). ## show\_ui If `true`, a route will be created for the Swagger UI (see [http://swagger.io/swagger-ui/](http://swagger.io/swagger-ui/)). Defaults to `true`. ## ui\_url Path of the swagger ui route. Will also be the prefix for all the CSS/JS dependencies of the page. Defaults to `/doc`. ## ui\_dir Filesystem path to the directory holding the assets for the Swagger UI page. Defaults to a copy of the Swagger UI code bundled with the [Dancer::Plugin::Swagger](https://metacpan.org/pod/Dancer::Plugin::Swagger) distribution. ## auto\_discover\_skip List of urls that should not be added to the Swagger document by `swagger_auto_discover`. If an url begins with `qr`, it will be compiled as a regular expression. Defauls to `/swagger.json` and, if `show_ui` is `true`, all the urls under `ui_url`. ## validate\_response If set to `true`, calls to `swagger_response` will verify if a schema is defined for the response, and if so validate against it. [JSON::Schema::AsType](https://metacpan.org/pod/JSON::Schema::AsType) is used for the validation (and this required if this option is used). Defaults to `false`. ## strict\_validation If set to `true`, dies if a call to `swagger_response` doesn't find a schema for its response. Defaults to `false`. # PLUGIN KEYWORDS ## swagger\_path $description, \\%args, $route ```perl swagger_path { description => 'Returns info about a judge', }, get '/judge/:judge_name' => sub { ...; }; ``` Registers a route as a swagger path item in the swagger document. `%args` is optional. The `$description` is optional as well, and can also be defined as part of the `%args`. ```perl # equivalent to the main example swagger_path 'Returns info about a judge', get '/judge/:judge_name' => sub { ...; }; ``` If the `$description` spans many lines, it will be left-trimmed. ```perl swagger_path q{ Returns info about a judge. Some more documentation can go here. And this will be seen as a performatted block by swagger. }, get '/judge/:judge_name' => sub { ...; }; ``` ### Supported arguments - method The HTTP method (GET, POST, etc) for the path item. Defaults to the route's method. - path The url for the path item. Defaults to the route's path. - description The path item's description. - tags Optional arrayref of tags assigned to the path. - parameters List of parameters for the path item. Must be an arrayref or a hashref. Route parameters are automatically populated. E.g., ```perl swagger_path get '/judge/:judge_name' => { ... }; ``` is equivalent to ```perl swagger_path { parameters => [ { name => 'judge_name', in => 'path', required => 1, type => 'string' }, ] }, get '/judge/:judge_name' => { ... }; ``` If the parameters are passed as a hashref, the keys are the names of the parameters, and they will appear in the swagger document following their alphabetical order. If the parameters are passed as an arrayref, they will appear in the document in the order in which they are passed. Additionally, each parameter can be given as a hashref, or can be a `name => arguments` pair. In both format, for the key/value pairs, a string value is considered to be the `description` of the parameter. Finally, if not specified explicitly, the `in` argument of a parameter defaults to `query`, and its type to `string`. ```perl parameters => [ { name => 'bar', in => 'path', required => 1, type => 'string' }, { name => 'foo', in => 'query', type => 'string', description => 'yadah' }, ], # equivalent arrayref with mixed pairs/non-pairs parameters => [ { name => 'bar', in => 'path', required => 1, type => 'string' }, foo => { in => 'query', type => 'string', description => 'yadah' }, ], # equivalent hashref format parameters => { bar => { in => 'path', required => 1, type => 'string' }, foo => { in => 'query', type => 'string', description => 'yadah' }, }, # equivalent, using defaults parameters => { bar => { in => 'path', required => 1 }, foo => 'yadah', }, ``` - responses Possible responses from the path. Must be a hashref. ```perl swagger_path { responses => { default => { description => 'The judge information' } }, }, get '/judge/:judge_name' => { ... }; ``` If the key `example` is given (instead of `examples` as defined by the Swagger specs), and the serializer used by the application is [Dancer::Serializer::JSON](https://metacpan.org/pod/Dancer::Serializer::JSON) or [Dancer::Serializer::YAML](https://metacpan.org/pod/Dancer::Serializer::YAML), the example will be expanded to have the right content-type key. ```perl swagger_path { responses => { default => { example => { fullname => 'Mary Ann Murphy' } } }, }, get '/judge/:judge_name' => { ... }; # equivalent to swagger_path { responses => { default => { examples => { 'application/json' => { fullname => 'Mary Ann Murphy' } } } }, }, get '/judge/:judge_name' => { ... }; ``` The special key `template` will not appear in the Swagger doc, but will be used by the `swagger_template` plugin keyword. ## swagger\_template $code, $args ```perl swagger_path { responses => { 404 => { template => sub { +{ error => "judge '$_[0]' not found" } } }, }, get '/judge/:judge_name' => { my $name = param('judge_name'); return swagger_template 404, $name unless in_db($name); ...; }; ``` Calls the template for the `$code` response, passing it `$args`. If `$code` is numerical, also set the response's status to that value. ## swagger\_auto\_discover skip => \\@list Populates the Swagger document with information of all the routes of the application. Accepts an optional `skip` parameter that takes an arrayref of routes that shouldn't be added to the Swagger document. The routes can be specified as-is, or via regular expressions. If no skip list is given, defaults to the c<auto\_discover\_skip> configuration value. ```perl swagger_auto_discover skip => [ '/swagger.json', qr#^/doc/# ]; ``` The information of a route won't be altered if it's already present in the document. If a route has path parameters, they will be automatically added as such in the `parameters` section. Routes defined as regexes are skipped, as there is no clean way to automatically make them look nice. ```perl # will be picked up get '/user' => ...; # ditto, as '/user/{user_id}' get '/user/:user_id => ...; # won't be picked up get qr#/user/(\d+)# => ...; ``` Note that routes defined after `swagger_auto_discover` has been called won't be added to the Swagger document. Typically, you'll want `swagger_auto_discover` to be called at the very end of your module. Alternatively, `swagger_auto_discover` can be called more than once safely -- which can be useful if an application creates routes dynamically. ## swagger\_definition $name => $definition, ... Adds a schema (or more) to the definition section of the Swagger document. ```perl swagger_definition 'Judge' => { type => 'object', required => [ 'fullname' ], properties => { fullname => { type => 'string' }, seasons => { type => 'array', items => { type => 'integer' } }, } }; ``` The function returns the reference to the definition that can be then used where schemas are used. ```perl my $Judge = swagger_definition 'Judge' => { ... }; # $Judge is now the hashref '{ '$ref' => '#/definitions/Judge' }' # later on... swagger_path { responses => { default => { schema => $Judge }, }, }, get '/judge/:name' => sub { ... }; ``` # EXAMPLES See the `examples/` directory of the distribution for a working example. # SEE ALSO - [http://swagger.io/|Swagger](http://swagger.io/|Swagger) # AUTHOR Yanick Champoux [![endorse](http://api.coderwall.com/yanick/endorsecount.png)](http://coderwall.com/yanick) # COPYRIGHT AND LICENSE This software is copyright (c) 2021, 2016, 2015 by Yanick Champoux. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.