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File URL Resource

Tracks the update of a single URL-addressable file. This is a useful resource for pipeline development time, while a required artifact is temporarily available from a URL-addressable location, until it is moved to a more robust file management repository such as git or S3.

Source Configuration

  • url: Required. The url location of the file. It has to be publicly available, no user authentication supported in v0.0.1.

  • filename: Optional. The name of the file for the downloaded artifact to be save as. If not provided, the file will be saved using the full url string as its name.

  • skip_ssl_verification: Optional. Skips ssl verification if defined as true. Default is false.

Example

Resource configuration:

resource_types:
- name: file-url
  type: docker-image
  source:
    repository: pivotalservices/concourse-curl-resource
    tag: latest

resources:
- name: my-file
  type: file-url
  source:
    url: https://raw.githubusercontent.com/pivotalservices/concourse-curl-resource/master/test/data/pivotal-1.0.0.txt  
    filename: pivotal-1.0.0.txt

Behavior

check: Check for the latest version of the file.

The resource uses curl under-the-covers to post a GET request and retrieve the HTTP header info for the file URL provided.
If field Last-Modified is returned as part of the HTTP response header, then the resource will use that to build a version number timestamp with format "YYYYMMDDHHMMSS".
Otherwise, the timestamp string will be built using the request's current time, which will result in a new version being returned every time check is executed for that file.

To verify if a file URL returns the Last-Modified information in its HTTP response header, issue the curl command below and search for field "Last-Modified" in its output. curl -I <file-url>

in: Download the latest version of the file.

Downloads the latest version of the file issuing a curl command under-the-covers.

out: Not supported.

Write actions are not supported by this resource at this moment.