EGroupware REST API for Links and attachments

linking application entries to other application entries
attaching files to application entries
listing, creating and deleting links and attachments

Authentication is via Basic Auth with username and a password, or a token valid for:

either just the given user or all users
CalDAV/CardDAV Sync (REST API)
application the link or attachment is created for

Following schema is used for JSON encoding of links and attachments

@type: Link
href: string URI to linked entry or attachments
title: string title of link
contentType: string application/json for links, content-type of attachments
size: size of attachments
egroupware.org-remark: string
egroupware.org-app: string application name of the linked entry
egroupware.org-id: string application ID of the linked entry
rel: string egroupware.org-primary to mark a primary link for InfoLog entries

Supported request methods and examples

GET to application entry collections to return all links and attachments

Example: Getting all links and attachments of a given application entry

curl https://example.org/egroupware/groupdav.php/<username>/<app>/<id>/links/ -H "Accept: application/pretty+json" --user <username>
HTTP/1.1 200 Ok
Content-Type: application/json

{
    "responses": {
        "/<username>/<app>/<id>/links/<link-id>": {
            "@type": "Link",
            "href": "https://example.org/egroupware/groupdav.php/ralf/addressbook/46",
            "contentType": "application/json",
            "title": "EGroupware GmbH: Becker, Ralf",
            "egroupware.org-app": "addressbook",
            "egroupware.org-id": "46",
            "egroupware.org-remark": "Testing ;)"
        },
        "/<username>/<app>/<id>/links/<link-id>": {
            "@type": "Link",
            "href": "https://example.org/egroupware/groupdav.php/ralf/infolog/1161",
            "contentType": "application/json",
            "title": "Test mit primärem Link (#1161)",
            "egroupware.org-app": "infolog",
            "egroupware.org-id": "1161"
        },
        "/<username>/<app>/<id>/links/<attachment-id>": {
            "@type": "Link",
            "href": "https://example.org/egroupware/webdav.php/apps/timesheet/199/image.svg",
            "contentType": "image/svg+xml",
            "size": 17167,
            "title": "image.svg"
        }
    }
}

POST request to upload an attachment or link with another application entry

Example: Adding a PDF as attachment to an application entry

curl -i 'https://example.org/egroupware/groupdav.php/<username>/<app>/<id>/links/<filename>' -H "Content-Type: application/pdf" --data-binary @<path-to-pdf> --user <username>

HTTP/1.1 204 Created
Location: https://example.org/egroupware/groupdav.php/<username>/<app>/<id>/links/<attachment-id>

Example: Creating a link from one application entry to another

curl -i 'https://example.org/egroupware/groupdav.php/<username>/<app>/<id>/links/' -H "Content-Type: application/json" --data-binary @- --user <username> <<<EOF
{"app":"<2nd-app>","id":<2nd-app-id>,"remark":"This is a test ;)"}
EOF

HTTP/1.1 204 Created
Location: https://example.org/egroupware/groupdav.php/<username>/<app>/<id>/links/<link-id>

Example: Creating the primary link for an InfoLog entry

curl -i 'https://example.org/egroupware/groupdav.php/<username>/infolog/<id>/links/' -H "Content-Type: application/json" --data-binary @- --user <username> <<<EOF
{"app":"<2nd-app>","id":<2nd-app-id>,"rel":"egroupware.org-primary"}
EOF

HTTP/1.1 204 Created
Location: https://example.org/egroupware/groupdav.php/<username>/infolog/<id>/links/<link-id>

<id> is the numerical ID of the entry of application <app>, NOT the UUID some applications have! <2nd-app-id> is also the numerical ID of <2nd-app>, not the UUID

DELETE request to remove a link or attachment

Example: deleting an attachment or link

curl -X DELETE 'https://example.org/egroupware/groupdav.php/<app>/<id>/links/<link-or-attachment-id>' --user <username>

HTTP/1.1 201 No Content

one can use Accept: application/pretty+json to receive pretty-printed JSON eg. for debugging and exploring the API

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