"send_get_body_as"

    $e = Search::Elasticsearch->new(
        send_get_body_as => 'POST'
    );

Certain endpoints like "search()" in Search::Elasticsearch::Client::6_0::Direct default to using a "GET" method, even when they include a request body. Some proxy servers do not support "GET" requests with a body. To work around this, the "send_get_body_as" parameter accepts the following:

• "GET"

  The default. Request bodies are sent as "GET" requests.

• "POST"

  The method is changed to "POST" when a body is present.

• "source"

  The body is encoded as JSON and added to the query string as the "source" parameter. This has the advantage of still being a "GET" request (for those filtering on request method) but has the disadvantage of being restricted in size. The limit depends on the proxies between the client and Elasticsearch, but usually is around 4kB.

"perform_request()"

    $result = $e->transport->perform_request(
        method => 'POST',
        path   => '/_search',
        qs     => { from => 0, size => 10 },
        body   => {
            query => {
                match => {
                    title => "Elasticsearch clients"
                }
            }
        }
    );

Other than the "method", "path", "qs" and "body" parameters, which should be self-explanatory, it also accepts:

"ignore"

The HTTP error codes which should be ignored instead of throwing an error, eg "404 NOT FOUND":

    $result = $e->transport->perform_request(
        method => 'GET',
        path   => '/index/type/id'
        ignore => [404],
    );
    

"serialize"

Whether the "body" should be serialized in the standard way (as plain JSON) or using the special bulk format: "std" or "bulk".