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POST/PUT

Creating resources, media and files - POST/PUT Requests

Authorization

You will need to use one of the configured authorization methods to create content, media and/or files.

These are defined under Authorization on the overview.

Content (Nodes)

REST configuration

The above setup shows that you can perform a POST request against a node at the /node endpoint with a body in the JSON format.

To create a node you need to provide two elements in your message body. The node type and any required field values.

For the islandora_demo included Repository Item these are:

  1. A type - this tells Drupal what content type we are creating
  2. A title - this is a required field of all nodes.
  3. A model - this is a required by Islandora to tell the type of object (i.e. Image, Audio, Collection)

A good way to make your first POST request is to perform a GET request against an existing node and erase all the extra content.

You can find more information about GET requests here

Again we are using the json format.

🍎 For example curl -X GET 'http://localhost:8000/node/3?_format=json

Look for the type element

"type" : [
  {
    "target_id" : "islandora_object",
    "target_type" : "node_type",
    "target_uuid" : "62189bec-3ef3-4196-b847-b17e5ce61fd5"
  }
]

In our example "islandora_object" is the type of the default "Repository Item", if you have created a new type you will have a different target_id.

You will not need the target_uuid.

Next look for the title element

"title" : [
  {
    "value" : "An example Islandora object"
  }
]

Lastly look for the field_model element

"field_model": [
  {
    "target_id": 24,
    "target_type": "taxonomy_term",
    "target_uuid": "e7560b68-e95a-4e76-9671-2a3041cd9800",
    "url": "\\/taxonomy\\/term\\/24"
  }
]

You can find the models by browsing the taxonomy terms available at http://localhost:8000/admin/structure/taxonomy/manage/islandora_models/overview

In my example installation 24 is an "Image", but let's create a collection which is 23.

Note: Taxonomy terms may vary between instances and you should verify the correct number for your installation.

So the body of the request will be:

{
  "type": [
    {
      "target_id": "islandora_object",
      "target_type": "node_type"
    }
  ],
  "title": [
    {
      "value": "Created a collection with POST"
    }
  ],
  "field_model": [
    {
      "target_id": 23,
      "target_type": "taxonomy_term"
    }
  ]
}

Note: You must include an appropriate Content-type header for the format you're requesting

Other Note: You must include some authentication credentials to say who you are and so Drupal can check if you are allowed to create this object. Otherwise you will receive a 401 Unauthorized response.

If you do provide credentials but don't have permission, you will receive a 403 Forbidden response.

You can find more information about Authorization here

🍎 For example:

curl -i -X POST -u admin:islandora -H"Content-type: application/json" --data '{"type":[{"target_id":"islandora_object","target_type":"node_type"}],"title":[{"value":"Created a collection with POST"}],"field_model":[{"target_id":23,"target_type":"taxonomy_term"}]}' 'http://localhost:8000/node?_format=json'

HTTP/1.1 201 Created
Date: Tue, 05 Mar 2019 18:07:00 GMT
Server: Apache/2.4.18 (Ubuntu)
X-Powered-By: PHP/7.1.26-1+ubuntu16.04.1+deb.sury.org+1
Location: http://localhost:8000/node/3
Cache-Control: must-revalidate, no-cache, private
X-UA-Compatible: IE=edge
Content-language: en
X-Content-Type-Options: nosniff
X-Frame-Options: SAMEORIGIN
Expires: Sun, 19 Nov 1978 05:00:00 GMT
Vary: 
X-Generator: Drupal 8 (https://www.drupal.org)
Content-Length: 1564
Content-Type: application/json

{"nid":[{"value":3}],"uuid":[{"value":"3f618cdc-3f2a-4e77-b932-9ff1d461a57a"}],"vid":[{"value":3}],"langcode":[{"value":"en"}],"type":[{"target_id":"islandora_object","target_type":"node_type","target_uuid":"62189bec-3ef3-4196-b847-b17e5ce61fd5"}],"revision_timestamp":[{"value":"2019-03-05T18:07:00+00:00","format":"Y-m-d\\TH:i:sP"}],"revision_uid":[{"target_id":1,"target_type":"user","target_uuid":"46a47057-de2d-4ce2-87ae-dbe4551209b8","url":"\/user\/1"}],"revision_log":[],"status":[{"value":true}],"title":[{"value":"Created a collection with POST"}],"uid":[{"target_id":1,"target_type":"user","target_uuid":"46a47057-de2d-4ce2-87ae-dbe4551209b8","url":"\/user\/1"}],"created":[{"value":"2019-03-05T18:07:00+00:00","format":"Y-m-d\\TH:i:sP"}],"changed":[{"value":"2019-03-05T18:07:00+00:00","format":"Y-m-d\\TH:i:sP"}],"promote":[{"value":true}],"sticky":[{"value":false}],"default_langcode":[{"value":true}],"revision_translation_affected":[{"value":true}],"content_translation_source":[{"value":"und"}],"content_translation_outdated":[{"value":false}],"field_access_terms":[],"field_alternative_title":[],"field_description":[],"field_display_hints":[],"field_edtf_date":[],"field_edtf_date_created":[],"field_edtf_date_issued":[],"field_extent":[{"value":"1 item"}],"field_identifier":[],"field_linked_agent":[],"field_member_of":[],"field_model":[{"target_id":23,"target_type":"taxonomy_term","target_uuid":"6a3b293d-4617-417b-99d2-23d75b57f7c2","url":"\/taxonomy\/term\/23"}],"field_pid":[],"field_resource_type":[],"field_rights":[],"field_subject":[]}

The parts of the above request are:

  1. -i - return the response headers
  2. -X POST - send a POST request
  3. -u admin:islandora - use these basic authentication credentials
  4. -H"Content-type: application/json" - send the content-type header
  5. --data {...} - send the request body (seen above)
  6. 'http://localhost:8000/node?_format=json' - the endpoint of the request

Files and Media

Drupal is supposed to have a way to upload files, but this seems to require the use of an X-CSRF-Token, which can only be retrieved using Cookie authentication and even then does not allow you to upload.

Consequently there is a REST endpoint not listed in the REST UI, because it is not configurable and is part of the Islandora 8 system.

This endpoint is available at http://localhost:8000/node/{node id}/media/{media type}/{media use}

It only accepts PUT requests. If the media and file don't exist they are created, if they exist the file is updated with the new body.

The node and taxonomy term are used to search (via an entity query) for a media. If this media exists the body of the file is replaced with the new content, otherwise a new file is created to hold the contents.

The tokens to this URI are as follows:

  1. node id : The numeric ID of the node you wish to link this media/file to.
  2. media type : The media type name you wish to create (i.e. image, file, audio)
  3. media use : The numeric ID of the media use taxonomy term to set for this media

You can find the media use taxonomy terms at http://localhost:8000/admin/structure/taxonomy/manage/islandora_media_use/overview

So the body of the request is the actual binary file to upload.

🍎 For example:

With a local file called my-image.png that I wanted to link to a node with ID 3.

I am using the taxonomy term "Original file", which on my machine is 16

> curl -i -X PUT -u admin:islandora -H"Content-type: image/png" --data-binary "@my-image.png" -H"Content-Location: public://images/my-image.png" 'http://localhost:8000/node/3/media/image/16'

HTTP/1.1 100 Continue

HTTP/1.1 201 Created
Date: Tue, 05 Mar 2019 22:01:39 GMT
Server: Apache/2.4.18 (Ubuntu)
X-Powered-By: PHP/7.1.26-1+ubuntu16.04.1+deb.sury.org+1
Cache-Control: must-revalidate, no-cache, private
Location: http://localhost:8000/media/4
X-UA-Compatible: IE=edge
Content-language: en
X-Content-Type-Options: nosniff
X-Frame-Options: SAMEORIGIN
Expires: Sun, 19 Nov 1978 05:00:00 GMT
Vary: 
X-Generator: Drupal 8 (https://www.drupal.org)
Content-Length: 0
Content-Type: text/html; charset=UTF-8

The parts of the above request are:

  1. -i - return the response headers
  2. -X PUT - send a PUT request
  3. -u admin:islandora - use these basic authentication credentials
  4. -H"Content-type: image/png" - send the content-type header
  5. --data-binary "@my-image.png" - send the contents of the file located at my-image.png as binary
  6. -H"Content-Location: public://images/my-image.png" - store the file in the public scheme (ie. in Drupal) at the path images/my-image.png, to store the file in Fedora use the fedora// scheme (ie. fedora://images/my-image.png)
  7. 'http://localhost:8000/node/3/media/image/16' - the endpoint of the request specifying the node, media type and taxonomy term.