HttpBody

Message that represents an arbitrary HTTP body. It should only be used for payload formats that can't be represented as JSON, such as raw binary or an HTML page.

This message can be used both in streaming and non-streaming API methods in the request as well as the response.

It can be used as a top-level request field, which is convenient if one wants to extract parameters from either the URL or HTTP template into the request fields and also want access to the raw HTTP body.

JSON representation 
{
  "contentType": string,
  "data": string,
  "extensions": [
    {
      "@type": string,
      field1: ...,
      ...
    }
  ]
}
Fields
contentType

string

The HTTP Content-Type header value specifying the content type of the body.
data

string (bytes format)

The HTTP request/response body as raw binary.

A base64-encoded string.
extensions[]

object

Application specific response metadata. Must be set in the first response for streaming APIs.

An object containing fields of an arbitrary type. An additional field "@type" contains a URI identifying the type. Example: { "id": 1234, "@type": "types.example.com/standard/id" }.