Mojolicious::Plugin::InputValidation - Validate incoming requests
use Mojolicious::Lite; plugin 'InputValidation'; # This needs to be done where one wants to use the iv_* routines. use Mojolicious::Plugin::InputValidation; post '/books' => sub { my $c = shift; # Validate incoming requests against our data model. if (my $error = $c->validate_json_request({ title => iv_any, abstract => iv_any(optional => 1, empty => 1), author => { firstname => iv_word, lastname => iv_word, }, published => iv_datetime, price => iv_float, revision => iv_int, isbn => iv_any(pattern => qr/^[0-9\-]{10,13}$/), advertise => iv_bool, })) { return $c->render(status => 400, text => $error); } # Now the payload is safe to use. my $payload = $c->req->json; ... };
Mojolicious::Plugin::InputValidation compares structures against a pattern. The pattern is usually a nested structure, so the compare methods search recursively for the first non-matching value. If such a value is found a speaking error message is returned, otherwise a false value.
Mojolicious::Plugin::InputValidation adds methods to the connection object in a mojolicous controller. This way input validation becomes easy.
my $error = $c->validate_json_request($pattern);
This method try to match the json request payload ($c->req->json) against the given pattern. If the payload matches, a false value is returned. If the payload on the other hand does not match the pattern, the first non-matching value is returned along with a speaking error message. The error message could look like:
"Unexpected keys 'id,name' found at path /author"
The pattern consists of one or more types the input is matched against. The following types are available.
This is the base type for all other types. By default it matches defined values only. It supports beeing optional, means that it is okay if this element is missing entirely in the payload. When this type is marked as nillable, it also accepts a null/undef value. To accept an empty string, mark it as empty. This type supports a regex pattern to match against. All options can be combined.
{ foo => iv_any, bar => iv_any(optional => 1, empty => 1), baz => iv_any(nillable => 1), quux => iv_any(pattern => qr/^new|mint|used$/), }
This type matches integers, literally digits with an optional leading dash.
{ foo => iv_int, bar => iv_int(optional => 1), baz => iv_int(nillable => 1), }
This type matches floats, so digits divided by a single dot, with an optional leading dash.
{ foo => iv_float, bar => iv_float(optional => 1), baz => iv_float(nillable => 1), }
This type matches booleans: true and false.
{ foo => iv_bool, bar => iv_bool(optional => 1), baz => iv_bool(nillable => 1), }
This type is meant to match identifiers. It matches word character strings (\w+). Using the iv_any type one can achieve the same with: iv_any(pattern => qr/^\w+$/) To accept an empty string, mark it as empty.
{ foo => iv_word, bar => iv_word(optional => 1, empty => 1), baz => iv_word(nillable => 1), }
This type matches datetime strings in the following format:
YYYY-mm-DDTHH:mm:ssZ YYYY-mm-DDTHH:mm:ss-0100 YYYY-mm-DDTHH:mm:ss+0000 YYYY-mm-DDTHH:mm:ss+0100 YYYY-mm-DDTHH:mm:ss.uuu+0100
It also supports a regex pattern, but that kinda defeats the purpose of this type.
{ foo => iv_datetime, bar => iv_datetime(optional => 1), baz => iv_datetime(nillable => 1), quux => iv_datetime(pattern => qr/^\d\d\d\d-\d\d-\d\d$/, }
This types matches objects (hashes). It will recurse into the elements it contains. A hash as a pattern is automatically turned into a iv_object. Using a hash is the idiomatic way, unless you need to mark it as optional or nillable.
{ foo => { ... }, bar => iv_object(optional => 1, { ... }), baz => iv_object(nillable => 1, { ... }), }
This type will match arrays in two different ways. For one it can match a payload against a fixed shape, and second it can match against an elemnt base type. A literal array reference ([]) is turned into an iv_array of the first kind automatically. The following is valid:
{ foo => [iv_int, iv_word, ...], bar => iv_array(optional => 1, [iv_int, iv_word, ...]), baz => iv_array(nillable => 1, [iv_int, iv_word, ...]), quux => iv_array(of => iv_int, min => 1, max => 7), }
This plugin is in alpha state, means it might not work at all or not as advertised.
Mojolicious, Mojolicious::Guides, https://mojolicious.org.
Copyright 2018 Tobias Leich.
This program is free software; you can redistribute it and/or modify it under the terms of the the Artistic License (2.0). You may obtain a copy of the full license at:
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To install IV_ANY, copy and paste the appropriate command in to your terminal.
cpanm
cpanm IV_ANY
CPAN shell
perl -MCPAN -e shell install IV_ANY
For more information on module installation, please visit the detailed CPAN module installation guide.