彈性搜索和Codeigniter（PHP）

Question

我正在嘗試使用帶有Codeigniter框架的ElasticSearch。

我所做的只是安裝ElasticSearch並將在Web上找到的一個好的PHP庫復制（：P）到CI庫：

    class Elasticsearch {

  public $config_file = 'elasticsearch';
  public $index;

  function __construct($index = false){
      $CI =& get_instance();
      $CI->config->load($this->config_file);
      $this->server = $CI->config->item('es_server');

  }

  function call($path, $http = array()){
    if (!$this->index) throw new Exception('$this->index needs a value');
    return json_decode(file_get_contents($this->server . '/' . $this->index . '/' . $path, NULL, stream_context_create(array('http' => $http))));
  }

  //curl -X PUT http://localhost:9200/{INDEX}/
  function create(){
     $this->call(NULL, array('method' => 'PUT'));
  }

  //curl -X DELETE http://localhost:9200/{INDEX}/
  function drop(){
     $this->call(NULL, array('method' => 'DELETE'));
  }

  //curl -X GET http://localhost:9200/{INDEX}/_status
  function status(){
    return $this->call('_status');
  }

  //curl -X GET http://localhost:9200/{INDEX}/{TYPE}/_count -d {matchAll:{}}
  function count($type){
    return $this->call($type . '/_count', array('method' => 'GET', 'content' => '{ matchAll:{} }'));
  }

  //curl -X PUT http://localhost:9200/{INDEX}/{TYPE}/_mapping -d ...
  function map($type, $data){
    return $this->call($type . '/_mapping', array('method' => 'PUT', 'content' => $data));
  }

  //curl -X PUT http://localhost:9200/{INDEX}/{TYPE}/{ID} -d ...
  function add($type, $id, $data){
   echo  $this->call($type . '/' . $id, array('method' => 'PUT', 'content' => $data));
  }

  //curl -X GET http://localhost:9200/{INDEX}/{TYPE}/_search?q= ...
  function query($type, $q){
    return $this->call($type . '/_search?' . http_build_query(array('q' => $q)));
  }
}

然后我正在嘗試創建索引並簡單地檢索它們：

$this->load->library('elasticsearch');
                 $this->elasticsearch->index = 'comments';
                 $this->elasticsearch->create();
                 $data = '{author:jhon,datetime:2001-09-09 00:02:04}';
                 $this->elasticsearch->add($type ='details',$id = '1',$data);

當我運行此代碼時，它顯示我的錯誤：

A PHP Error was encountered

Severity: Warning

Message: file_get_contents(http://localhost:9200/comments/) [function.file-get-contents]: failed to open stream: HTTP request failed! HTTP/1.0 400 Bad Request

Filename: libraries/Elasticsearch.php

Line Number: 19
A PHP Error was encountered

Severity: Notice

Message: file_get_contents() [function.file-get-contents]: Content-type not specified assuming application/x-www-form-urlencoded

Filename: libraries/Elasticsearch.php

Line Number: 19
A PHP Error was encountered

Severity: Warning

Message: file_get_contents(http://localhost:9200/comments/details/1) [function.file-get-contents]: failed to open stream: HTTP request failed! HTTP/1.0 400 Bad Request

Filename: libraries/Elasticsearch.php

Line Number: 19

我錯誤/錯過了somenthing嗎？ 抱歉，我是關於elasticsearch的新手，還有一點關於php：P

因為如果我去：

http://localhost:9200/comments/details/1

//it prints in window
 {"_index":"comments","_type":"details","_id":"1","exists":false}

Answer 1

一個老問題，但值得更新。 使用此插件 。

將您的composer.json文件放在應用程序文件夾中：

{
     "require": {
     "elasticsearch/elasticsearch": "~2.0"
     }
}

要安裝composer和elasticsearch插件，請在bash shell中執行以下命令：

curl -s http://getcomposer.org/installer | php
php composer.phar install --no-dev

安裝php-curl並重啟apache服務器：

sudo apt-get install php5-curl
sudo service apache2 restart

在libraries文件夾（codeigniter）中創建一個Elasticsearch.php文件，並將此代碼放入：

<?php 
use Elasticsearch\ClientBuilder;

class Elasticsearch{

    public $client;

    public function __construct(){
        $this->client = ClientBuilder::create()->build();
    } 
}

您可以通過編輯config文件夾中的autoload.php來自動加載elasticsearch：

$autoload['libraries'] = array(/*[some other library,]*/'elasticsearch');

然后在您的模型/控制器中使用：

$this->elasticsearch->client->index($params);

Answer 2

我不太確定，但我的猜測是你對add()調用：

$this->elasticsearch->add($type ='details',$id = '1',$data);

您不想在此處設置值。 我會假設你在HTTP錯誤請求之前得到一個php錯誤，但我會先嘗試這個：

$this->elasticsearch->add('details','1',$data);

你的add()方法已經知道參數代表什么，所以你只需要傳遞細節。

也

看起來你的json可能會出錯。

// change
$data = '{author:jhon,datetime:2001-09-09 00:02:04}';

// to
$data = '{author:"jhon",datetime:2001-09-09 00:02:04}';

Answer 3

您提供的PHP庫未定義內容類型，這就是您收到消息的原因：“未指定Content-type”。

在這里檢查PHP庫，並查看README.txt。 它有詳細的注釋，對初學者有用，你可能想要通過它們： https ： //github.com/niranjan-uma-shankar/Elasticsearch-PHP-class

如果您使用此庫，則可以像這樣初始化類：

$this->load->library('elasticsearch');
$elasticSearch = new $this->elasticsearch;
$elasticsearch->index = 'comments';
$elasticsearch->type = 'details';
$elasticsearch->create();
$data = '{"author" : "jhon", "datetime" : "2001-09-09 00:02:04"}';
$elasticsearch->add(1, $data);

Answer 4

調用傳遞參數的函數，不帶引號（單引號或雙引號）：

$this->elasticsearch->add(details, 1, $data);

另外，對我來說，使用數組然后將其編碼為json對象更容易：

$data = array('author' => 'john', 'datetime' => '2001-09-09 00:02:04');
$this->elasticsearch->add(details, 1, json_encode($data));