How to send filters parameters in JSON request to HBase REST API?

I got the answer by other's hint:

<?php$headers = array(    'Accept: application/json',    'Content-Type: application/json',);if (!file_exists(__DIR__ . '/tmp')) {    mkdir(__DIR__ . '/tmp', 0777);}$scannerFile = __DIR__ . '/tmp/scanner';if (!file_exists($scannerFile)) {    $ch = curl_init();    curl_setopt($ch, CURLOPT_URL, "http://hbase_uri:20550/news/scanner");    curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);    curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_GSSNEGOTIATE);    curl_setopt($ch, CURLOPT_USERPWD, ":");    curl_setopt($ch, CURLOPT_POST, true);    curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode(array(        'batch' => 10,        'filter' => json_encode(array(            'type' => 'PrefixFilter',            'value' => 'u123',        )),    )));    curl_setopt($ch, CURLOPT_HEADER, 1);    curl_setopt($ch, CURLOPT_VERBOSE, 1);    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);    $page = curl_exec($ch);    file_put_contents($scannerFile, $page);    curl_close($ch);} else {    $s = file_get_contents($scannerFile);    $parts = explode('Location: http://hbase_uri:20550/news/scanner/', $s);    $parts = explode("\n", $parts[1]);    $parts[0] = trim($parts[0]);    $ch = curl_init();    curl_setopt($ch, CURLOPT_URL, "http://hbase_uri:20550/news/scanner/" . $parts[0]);    curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);    curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_GSSNEGOTIATE);    curl_setopt($ch, CURLOPT_USERPWD, ":");    curl_setopt($ch, CURLOPT_HEADER, 1);    curl_setopt($ch, CURLOPT_VERBOSE, 1);    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);    $page = curl_exec($ch);    file_put_contents(__DIR__ . '/tmp/result', $page);    curl_close($ch);    $ch = curl_init();    curl_setopt($ch, CURLOPT_URL, "http://hbase_uri:20550/news/scanner/" . $parts[0]);    curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);    curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_GSSNEGOTIATE);    curl_setopt($ch, CURLOPT_USERPWD, ":");    curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'DELETE');    curl_setopt($ch, CURLOPT_HEADER, 1);    curl_setopt($ch, CURLOPT_VERBOSE, 1);    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);    $page = curl_exec($ch);    file_put_contents(__DIR__ . '/tmp/result_delete', $page);    curl_close($ch);}

For the future visitors.

Using @kiang answer I have successfully made a CURL POST creating an scanner:

curl \  --verbose \  --request POST \  --header 'Accept: application/json' \  --header 'Content-Type: application/json' \  --data '{"batch":10,"filter":"{\"type\":\"PrefixFilter\",\"value\":\"u123\"}"}' \  'https://hbase:20550/namespace:table/scanner/'

This returned

Location -> Buffer(https://hbase:20550/namespace:table/scanner/151302168977413777789)...AhcWSResponse(StandaloneAhcWSResponse(201, Created))

What might be useful:

• Using those examples (you need to escape " signs)
• Finding the docs of ScannerModel.