使用 PHP 中的 curl 获取 Elasticsearch 结果答案

【问题标题】：Using curl from PHP to get Elasticsearch results使用 PHP 中的 curl 获取 Elasticsearch 结果
【发布时间】：2020-01-03 06:37:04
【问题描述】：

我在 AWS 上设置了一个 Ubuntu 18.04 实例，并在其上安装了 Elasticsearch 版本 7。我还为它分配了一个 FQDN

我用了一个例子，在上面加载了莎士比亚的全部作品。我安装了

从我的 Mac，使用终端，我 ssh'ed 到 AWS 实例（使用它的 FQDN），然后从终端，我执行以下操作：

curl -H "Content-Type: application/json" -XGET '127.0.0.1:9200/shakespeare/_search?pretty' -d'

> {
>   "query":
>     {
>       "match_phrase": {
>                         "text_entry":"to be or not to be"
>                       }
>     }
> }'

我得到一个答案：

{
  "took" : 2,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 1,
      "relation" : "eq"
    },
    "max_score" : 13.889601,
    "hits" : [
      {
        "_index" : "shakespeare",
        "_type" : "_doc",
        "_id" : "34229",
        "_score" : 13.889601,
        "_source" : {
          "type" : "line",
          "line_id" : 34230,
          "play_name" : "Hamlet",
          "speech_number" : 19,
          "line_number" : "3.1.64",
          "speaker" : "HAMLET",
          "text_entry" : "To be, or not to be: that is the question:"
        }
      }
    ]
  }
}

我尝试写一个PHP脚本，做同样的事情，如下：

<?php

$query = '{
  "query":
    {"match_phrase":{
      "text_entry":"to be or not to be"
    }
  }
}';
$url = 'http://myserver.com:9200?shakespeare/_search?pretty';
$method = "GET";
$ch = curl_init();    
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, strtoupper($method));
curl_setopt($ch, CURLOPT_POSTFIELDS, $query);
$result = array('info' => curl_getinfo($ch), 'op_result' => json_decode(curl_exec($ch), TRUE));       
print_r($result);

但是，我没有得到任何结果：

Array
(
    [info] => Array
        (
            [url] => http://myserver.com:9200?shakespeare/_search?pretty
            [content_type] => 
            [http_code] => 0
            [header_size] => 0
            [request_size] => 0
            [filetime] => -1
            [ssl_verify_result] => 0
            [redirect_count] => 0
            [total_time] => 0
            [namelookup_time] => 0
            [connect_time] => 0
            [pretransfer_time] => 0
            [size_upload] => 0
            [size_download] => 0
            [speed_download] => 0
            [speed_upload] => 0
            [download_content_length] => -1
            [upload_content_length] => -1
            [starttransfer_time] => 0
            [redirect_time] => 0
            [redirect_url] => 
            [primary_ip] => 
            [certinfo] => Array
                (
                )

            [primary_port] => 0
            [local_ip] => 
            [local_port] => 0
        )

    [op_result] => 
)

有什么想法吗？

【问题讨论】：

您不会手动编写 HTTP 请求，是吗？我强烈建议使用a proper high-level library 而不是curl。

标签： php elasticsearch curl

【解决方案1】：

这个https://incarnate.github.io/curl-to-php/ 或将你的 CURL 放入 Postman 并在 PHP 中生成代码

$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, '127.0.0.1:9200/shakespeare/_search?pretty');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, "\n{\n\"query\":\n    {\n      \"match_phrase\": {\n                        \"text_entry\":\"to be or not to be\"\n                      }\n    }\n}");
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'GET');


$headers = array();
$headers[] = 'Content-Type: application/json';
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);

$result = curl_exec($ch);
if (curl_errno($ch)) {
    echo 'Error:' . curl_error($ch);
}
curl_close($ch);

【讨论】：