I'm having difficulty finding any sort of module or documentation on making multipart/mixed requests. Note this is not for sending an email--I'm trying to use the Google Drive v3 REST API, specifically the batch request (see below).

There is an non-Perl "example" given by Google on the Batching Requests page:

Example batch request

POST https://www.googleapis.com/batch

Accept-Encoding: gzip
User-Agent: Google-HTTP-Java-Client/1.20.0 (gzip)
Content-Type: multipart/mixed; boundary=END_OF_PART
Content-Length: 963

--END_OF_PART
Content-Length: 337
Content-Type: application/http
content-id: 1
content-transfer-encoding: binary


POST https://www.googleapis.com/drive/v3/files/<var class="apiparam">fileId</var>/permissions?fields=id
Authorization: Bearer <var class="apiparam">authorization_token</var>
Content-Length: 70
Content-Type: application/json; charset=UTF-8


{
  "emailAddress":"example@appsrocks.com",
  "role":"writer",
  "type":"user"
}
--END_OF_PART
Content-Length: 353
Content-Type: application/http
content-id: 2
content-transfer-encoding: binary


POST https://www.googleapis.com/drive/v3/files/<var class="apiparam">fileId</var>/permissions?fields=id&sendNotificationEmail=false
Authorization: Bearer <var class="apiparam">authorization_token</var>
Content-Length: 58
Content-Type: application/json; charset=UTF-8


{
   "domain":"appsrocks.com",
   "role":"reader",
   "type":"domain"
}
--END_OF_PART--

For example, I want to be able to use these specific calls to update/delete a permission (using PATCH or DELETE semantics) using batch requests:

Permissions: Update

Permissions: Delete

P.S. does anyone know if some key-value pairs can be unspecified--Content-Length, for example, in the above request

In reply to How do I make a multipart/mixed request (for REST API) in Perl? by YenForYang

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