Validating Data Everywhere with Rx

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SPAM

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Store Data Spam Storage

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Store Data Spam Storage pobox web server http

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{ “cur_page”: 1, “per_page”: 10, “total”: 902, “items”: [ { “id”: 1234, “hdr_subject”: “rock hard math tests”, “discarded_by”: “dnsbl/rbl.wolfram.com” }, ... ], }

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--- cur_page: 1 per_page: 10 total : 902 items : - id: 1234 hdr_subject : rock hard math tests discarded_by: dnsbl/rbl.wolfram.com ...

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Store Data Spam Storage pobox web server

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Store Data Spam Storage ajax web code pobox web server

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Store Data Spam Storage ajax web code pobox web server your cool app

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{ “cur_page”: 1, “per_page”: 10, “total”: 902, “items”: [ { “id”: 1234, “hdr_subject”: “rock hard math tests”, “discarded_by”: “dnsbl/rbl.wolfram.com” }, ... ], }

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XML

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--- cur_page: 1 per_page: 10 total : 902 items : - id: 1234 hdr_subject : rock hard math tests discarded_by: dnsbl/rbl.wolfram.com ...

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{ “cur_page”: 1, “per_page”: 10, “total”: 902, “items”: [ { “id”: 1234, “hdr_subject”: “rock hard math tests”, “discarded_by”: “dnsbl/rbl.wolfram.com” }, ... ], }

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rock hard math tests dnsbl rbl.wolfram.com

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XSD

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RELAX NG

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XML isn’t perlish

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...but schemas are good

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total : 902 cur_page: 1 per_page: 10 items : - id: 1234 hdr_subject : rock hard math tests discarded_by: dnsbl/rbl.wolfram.com

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total : 902 cur_page: 1 per_page: 10 items : - id: 1234 hdr_subject : rock hard math tests discarded_by: dnsbl/rbl.wolfram.com type: //rec required: total : //int per_page: //int cur_page: { type: //int, range: { min: 1 } } items : { type: //rec required: { ... }

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type: //rec required: total : //int per_page: //int cur_page: { type: //int, range: { min: 1 } } items : { type: //rec required: { ... }

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Perl

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my $rx = Data::Rx->new; Perl

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my $rx = Data::Rx->new; Perl

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my $rx = Data::Rx->new; my $data = { type => ‘//rec’, ... }; Perl

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my $rx = Data::Rx->new; my $data = { type => ‘//rec’, ... }; Perl

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my $rx = Data::Rx->new; my $data = { type => ‘//rec’, ... }; my $schema = $rx->make_schema($data); Perl

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my $rx = Data::Rx->new; my $data = { type => ‘//rec’, ... }; my $schema = $rx->make_schema($data); Perl

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my $rx = Data::Rx->new; my $data = { type => ‘//rec’, ... }; my $schema = $rx->make_schema($data); if ($schema->check( $input )) { Perl

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my $rx = Data::Rx->new; my $data = { type => ‘//rec’, ... }; my $schema = $rx->make_schema($data); if ($schema->check( $input )) { ... Perl

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my $rx = Data::Rx->new; my $data = { type => ‘//rec’, ... }; my $schema = $rx->make_schema($data); if ($schema->check( $input )) { ... } Perl

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my $rx = Data::Rx->new; my $data = decode_json( $json ); my $schema = $rx->make_schema($data); if ($schema->check( $input )) { ... } Perl

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var rx = new Rx(); var schema = rx.makeSchema( schemaFromJSON ); if (schema.check(input) { ... } JavaScript

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rx = Rx.Factory() schema = rx.makeSchema( schemaFromJSON ) if schema.check(input): ... Python

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rx = Rx.new schema = rx.makeSchema( schemaFromJSON ) if schema.check(input) then ... end Ruby

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$rx = new Rx(); $schema = $rx.makeSchema( $schemaFromJSON ) if ($schema.check( $input )) { ... } PHP

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$rx = new Rx(); $schema = $rx.makeSchema( $schemaFromJSON ) if ($schema.check( $input )) { ... } PHP (forgive me)

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--- type: //str “Isn’t it awfully nice to have a schema?”

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--- type: //int 42

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--- type : //int range: { min: 3, max: 18 } 17

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--- type : //int value: 10 10

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--- type : //any undef, 1, [ ... ], CGI->new

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--- type : //any of : - //int - //str - { type: //num, value: 3.141 } “String type, I choose you!”

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Simple Core Rx Types

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Simple Core Rx Types •//nil

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Simple Core Rx Types •//nil •//def

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Simple Core Rx Types •//nil •//def •//num

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Simple Core Rx Types •//nil •//def •//num •//int

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Simple Core Rx Types •//nil •//def •//num •//int •//bool

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Simple Core Rx Types •//nil •//def •//num •//int •//bool •//str

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Simple Core Rx Types •//nil •//def •//num •//int •//bool •//str •//one

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Simple Core Rx Types •//nil •//def •//num •//int •//bool •//str •//one •//fail

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the //arr type --- type: //arr length: { min: 6, max: 6 } contents: type : //int range: { min: 3, max: 18 } [ 7, 3, 4, 11, 17, 9 ]

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the //seq type --- type: //seq contents: - //int - //bool - //str [ 10, true, “awesome” ]

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the //map type --- type : //map values: //int { x => 1, y => 2, z => 3 }

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the //rec type --- type : //rec required: first: //str last : //str optional: { middle: //str } { first => ‘Rico’, last => ‘Signes’ }

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the //all type --- type : //all of: - { type: //int, range: { min: 3 } } - { type: //num, range: { max: 18 } } 10

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//str

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taguri

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tag: AUTHORITY , DATE : STRING

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tag:

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tag:rjbs.manxome.org

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tag:rjbs.manxome.org,2008-10-11

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tag:rjbs.manxome.org,2008-10-11:rx

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tag:rjbs.manxome.org,2008-10-11:rx/slide

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//str

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//str

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//str tag:codesimply.com,2008:rx/core/str

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--- type: //str

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--- type: tag:codesimply.com,2008:rx/core/str

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--- type: tag:codesimply.com,2008:rx/core/str --- type: //str

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/prefix/rest

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/prefix/rest (empty) tag:codesimply.com,2008:rx/core/ .meta tag:codesimply.com,2008:rx/meta/ local tag:[email protected]:2009:RxType,

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/prefix/rest (empty) tag:codesimply.com,2008:rx/core/ .meta tag:codesimply.com,2008:rx/meta/ local tag:[email protected]:2009:RxType,

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/prefix/rest (empty) tag:codesimply.com,2008:rx/core/ .meta tag:codesimply.com,2008:rx/meta/ local tag:[email protected]:2009:RxType,

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type: tag:[email protected]:2009:RxType,Account type: /local/Account type: tag:codesimply.com,2008:rx/core/str type: //str type: tag:codesimply.com,2008:rx/meta/str type: /.meta/str

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Making Types

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•decide what it does

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•decide what it does •give it a name (tag)

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•decide what it does •give it a name (tag) •write tests

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•decide what it does •give it a name (tag) •write tests •implement it

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•decide what it does •give it a name (tag) •write tests •implement it

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use Test::More tests => 2; my $rx = Data::Rx->new({ prefix => { moose => ‘tag:rjbs.manxome.org,2008-10-04:rx/moose/’, }, type_plugins => [ ‘Data::Rx::Type::MooseTC’ ] }); my $array_of_int = $rx->make_schema({ type => ‘/moose/tc’, moose_type => ‘ArrayRef[Int]’, }); ok($array_of_int->check([1]), “[1] is an ArrayRef[Int]”); ok(! $array_of_int->check( 1 ), “1 is not an ArrayRef[Int]”); t/moose-types.t

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•...but then you’d have to rewrite your tests in every language. •We already have Rx running on a bunch of platforms... •...with a shared test suite... •...and we can re-use it.

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{ “empty” : “[]”, “str-1” : “[\”string\”, 1 ]”, “0” : “[ 0 ]”, “0-1” : “[ 0, 1 ]”, “0-1-1” : “[ 0, 1, 1 ]”, “0-s1-1” : “[ 0, \”1\”, 1 ]”, “0-1-1-2”: “[ 0, 1, 1, 2 ]”, “0-1-1-2”: “[ 0, 1, 1, 2 ]”, “0-str” : “[ 0, \”string\” ]”, “0-str-3”: “[ 0, \”string\”, 3 ]”, “0-str-3-18” : “[ 0, \”string\”, 3, 18 ]”, “0-str-3-T” : “[ 0, \”string\”, 3, true ]”, “0-str-3-T-F” : “[ 0, \”string\”, 3, true, false ]”, “0-str-3-T-str”: “[ 0, \”string\”, 3, true, \”false\” ]”, “0-str-3-T-F-T”: “[ 0, \”string\”, 3, true, false, true ]” } spec/data/arr.json

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{ “schema”: { “type” : “//arr”, “contents”: { “type”: “//int” }, “length” : { “max”: 3 } }, “pass”: { “arr”: [ “empty”, “0”, “0-1”, “0-1-1” ] }, “fail”: { “arr” : [ “str-1”, “0-s1-1”, “0-1-1-2”, “0-str” ], “bool”: “*”, “null”: “*”, “num” : “*”, “obj” : “*”, “str” : “*” } } spec/schemata/array-3-int.json

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{ “schema”: { “type” : “tag:rx-foundation.biz/mtfnpy”, “hardness”: 8, “ronpaul” : false }, “pass”: { “mtf”: { “garbled”: true }, “arr”: [ “empty”, “0”, “0-1”, “0-1-1” ] }, “fail”: { “bool”: “*”, “null”: “*”, “num” : “*”, “obj” : “*”, “str” : “*” } } your-schema.json

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Rx validates data

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Rx validates data (not strings)

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Rx validates data (not strings) •Rx isn’t about JSON

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Rx validates data (not strings) •Rx isn’t about JSON •...or YAML

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Rx validates data (not strings) •Rx isn’t about JSON •...or YAML •it validates data in memory

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Rx validates data (not strings) •Rx isn’t about JSON •...or YAML •it validates data in memory •how you transmit it over the wire is your problem

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Core Types are Portable

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Core Types are Portable •you won’t see regex in Rx core

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Core Types are Portable •you won’t see regex in Rx core •because regex don’t work the same everywhere

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Core Types are Portable •you won’t see regex in Rx core •because regex don’t work the same everywhere •(but there is a PCRE type outside of core!)

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Too Portable for Perl!

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Too Portable for Perl! •//int means an integer

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Too Portable for Perl! •//int means an integer •but in many/most languages, 5 !== “5”

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Too Portable for Perl! •//int means an integer •but in many/most languages, 5 !== “5” •perl actually can’t distinguish these

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Too Portable for Perl! •//int means an integer •but in many/most languages, 5 !== “5” •perl actually can’t distinguish these •...that’s why the test suite has “todo”

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Non-portable Types

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Non-portable Types type: /perl/obj isa : DateTime

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Non-portable Types type: /perl/obj isa : DateTime type: /perl/obj does: Throwable

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Non-portable Types

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Non-portable Types type : /pcre/str regex: q/\A867-[530]{9}\z/

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Non-portable Types type : /pcre/str regex: q/\A867-[530]{9}\z/ type: /moose/tc does: ArrayRef[DateTime]