如何将 JSON 请求中的过滤器参数发送到 HBase REST API？

Question

我正在尝试开发一个 PHP 客户端来与 HBase REST API 交互。但我找不到使用 JSON 请求创建扫描仪的方法。我能找到的所有示例都使用 XML 格式。只是想知道是否可以使用 JSON 格式发送。

下面的代码返回错误信息： “HTTP/1.1 500 无法从 START_ARRAY 令牌中反序列化 java.lang.String 的实例”

<?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' => array(
            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);
}

Answer 1

为未来的访客。

使用@kiang 回答我已经成功创建了一个 CURL POST 创建扫描仪：

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/'

这返回了

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

什么可能有用：

• 使用那些examples（你需要转义"标志）
• 找到docs of ScannerModel。

Answer 2

我通过别人的提示得到了答案：

<?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);
}