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WP-API v2 Java Client

A Java client to version 2 of the WP REST API, recently merged into WordPress Core

(Currently coding against WordPress 4.8.x)

WordPress Supported Versions

The current 4.8 version supports WordPress 4.6-4.8.

See

• http://v2.wp-api.org/
• https://github.com/WP-API
• https://developer.wordpress.org/rest-api/

Current Development Requirements

• WordPress 4.8.0+ installation
• JSON Basic Authentication (0.1 currently used)

Implemented

• Posts CRUD
• Post Meta CRUD
• Terms CRUD
• Taxonomy CRUD
• Post Terms CRUD
• Pages CRUD
• Users

Work In Progress

...

Not Yet Implemented

• Post Revisions
• Post Types
• Post Statuses
• Comments

Basic Usage

Instantiating and using a new client

String baseUrl = "http://myhost";
String username = "myUsename";
String password = "myPassword";
boolean debug = false;

final Wordpress client = ClientFactory.fromConfig(ClientConfig.of(baseUrl, username, password, debug));

Creating a new post

final Post post = PostBuilder.aPost()
    .withTitle(TitleBuilder.aTitle().withRendered(expectedTitle).build())
    .withExcerpt(ExcerptBuilder.anExcerpt().withRendered(expectedExcerpt).build())
    .withContent(ContentBuilder.aContent().withRendered(expectedContent).build())
    .build();

final Post createdPost = client.createPost(post, PostStatus.publish);

Searching Posts

Search Posts not having a particular Meta Key

Sample Code

final PagedResponse<Post> response = client.search(SearchRequest.Builder.aSearchRequest(Post.class)
        .withUri(Request.POSTS)
        .withParam("filter[meta_key]", "baobab_indexed")
        .withParam("filter[meta_compare]", "NOT EXISTS") //RestTemplate takes care of escaping values ('space' -> '%20')
        .build());                
            

Equivalent Curl/httpie Request

$ http --auth 'username:password' http://myhost/wp-json/wp/v2/posts?filter[meta_key]=baobab_indexed&filter[meta_compare]=NOT%20EXISTS

Search types

The client is flexible enough to build search requests of a particular type, if that type supports filtering.

final PagedResponse<Media> tagResults = client.search(SearchRequest.Builder.aSearchRequest(Media.class)
    .withUri("/media")
    .withParam("filter[s]", "searchTerm")
    .build());

Available Filters

• See WordPress Codex for more filter options
• Also See Advanced/Restricted Filtering for configuring restricted options

More Usage Examples

• For more examples, see /src/test/java/com/afrozaar/wordpress/wpapi/v2/ClientLiveTest.java which has all the tests for a live installation and thus has examples of how to use the client.

Advanced/Restricted Filtering

For advanced filtering in a particular use case, it is required to search for posts not having a particular custom field. In order to search for such posts, the standard filter keys are not sufficient, and needs to be enabled by allowing more keys.

Do note that the effect of this change is only visible when an authenticated call is made, as per the WP-API documentation.

A snippet containing the keys that you wish to use needs to be added to either your theme's functions.php file, or WP-API's plugin.php:

function my_allow_meta_query( $valid_vars ) {

        $valid_vars = array_merge( $valid_vars, array( 'meta_key', 'meta_value', 'meta_compare' ) );
        return $valid_vars;
}
add_filter( 'rest_query_vars', 'my_allow_meta_query' );

Controlling HTTP Connection behavior

If needed, org.springframework.http.client.ClientHttpRequestFactory can be provided to control the HTTP connection behavior. Below example shows how to disable SSL verification when invoking https wordpress endpoints.

	TrustStrategy acceptingTrustStrategy = (X509Certificate[] chain, String authType) -> true;

	SSLContext sslContext = org.apache.http.ssl.SSLContexts.custom()
	        .loadTrustMaterial(null, acceptingTrustStrategy)
	        .build();

	SSLConnectionSocketFactory csf = new SSLConnectionSocketFactory(sslContext);

	CloseableHttpClient httpClient = HttpClients.custom()
	        .setSSLSocketFactory(csf)
	        .build();

	HttpComponentsClientHttpRequestFactory requestFactory =
	        new HttpComponentsClientHttpRequestFactory();

	requestFactory.setHttpClient(httpClient);

	boolean debug = false;

	final Wordpress wordpress = ClientFactory.builder(ClientConfig.of(httpBaseURL, username, password, debug))
            .withRequestFactory(requestFactory)
            .build();

TODO

• Add support for authentication providers such as OAuth. (Currently only basic authentication is used)

Testing

Live Testing

These tests are intended to run against a live WordPress installation.

For convenience, a wordpress docker has been created. This docker has a pre-installed-and-set-up wordpress instance, with the latest (beta9) version of rest-api and JSON Basic Auth plugins enabled. Configuration has already been included in the test configuration directory.

To make use of this docker, you can do the following:

docker run -d --name wp_build_test -p 80:80 afrozaar/wordpress:latest

More configuration is required (adding an entry to your hosts file), so see Afrozaar/docker-wordpress on GitHub.

Configuration

To run against your local wordpress installation, it is required to have a YAML configuration file available at: ${project}/src/test/resources/config/${hostname}-test.yaml with the following structure:

wordpress:
  username: "myUsername"
  password: "myPassword"
  baseUrl: "http://myhost"
  usePermalinkEndpoint: false

debug: "true"

This configuration must not be included in version control. *.yaml is already included in the .gitignore file.

Please ensure that you do not commit hard-coded environment information.

Maven

Latest snapshot is available from our public maven repository at

• https://maven-repository.afrozaar.com/artifactory/public-snapshot
• https://maven-repository.afrozaar.com/artifactory/public-release

Release versions should also be available on public maven repositories:

<dependency>
  <groupId>com.afrozaar.wordpress</groupId>
  <artifactId>wp-api-v2-client-java</artifactId>
  <version>4.8.1</version>
</dependency>