metadata_extract library

This library provides two Metadata Parsers and two utility functions for retriveing and parsing documents from a url.

OpenGraphParser and HTMLMetaParser are Metadata parsers that takes in a dom.Document Utility functions extract and responseToDocument help retrieving and decoding documents.

Classes

HtmlMetaParser

Takes a http.document and parses Metadata from <meta>, <title>, <img> tags

JsonLdParser

Takes a http.document and parses Metadata from json-ld data in <script>

Metadata

Container class for Metadata

MetadataKeys

The base class for implementing a parser

MetadataParser

Does Works with BaseMetadataParser

OpenGraphParser

Takes a http.Document and parses Metadata from <meta property='og:*'> tags

TwitterCardParser

Takes a http.Document and parses Metadata from <meta property='twitter:*'> tags

Mixins

BaseMetadataParser

Functions

extract(String url) → Future<Metadata?>

Fetches a url, validates it, and returns Metadata.

responseToDocument(Response response) → Document?

Takes an http.Response and returns a html.Document

Typedefs

ParseFunction<T extends BaseMetadataParser> = T Function(Document? doc)