使用 $ .getJSON 的 Elasticsearch 查询答案

【问题标题】：Elasticsearch query using $ .getJSON使用 $ .getJSON 的 Elasticsearch 查询
【发布时间】：2020-08-05 15:06:09
【问题描述】：

由于实现要求，我正在使用 $ .getJSON 语句查询以下名为 job6 的弹性搜索索引。

{
"took": 0,
"timed_out": false,
"_shards": {
    "total": 1,
    "successful": 1,
    "skipped": 0,
    "failed": 0
},
"hits": {
    "total": {
        "value": 5,
        "relation": "eq"
    },
    "max_score": 1.0,
    "hits": [{
            "_index": "job6",
            "_type": "_doc",
            "_id": "2e2ed07786c01e9fd845b62fb86a693a",
            "_score": 1.0,
            "_source": {
                "meta": {},
                "file": {
                    "extension": "txt",
                    "content_type": "text/plain",
                    "created": "2020-04-03T11:57:45.673+0000",
                    "last_modified": "2020-02-27T16:15:27.795+0000",
                    "last_accessed": "2020-04-03T11:57:45.673+0000",
                    "indexing_date": "2020-04-14T13:56:51.668+0000",
                    "filesize": 0,
                    "filename": "fichero0_borrador.txt",
                    "url": "file://C:\\TMPM\\carpeta0\\99.Borrador\\fichero0_borrador.txt"
                },
                "path": {
                    "root": "4cface21f575d5e5985e4e3889c278a3",
                    "virtual": "PM/carpeta0/99.Borrador/fichero0_borrador.txt",
                    "real": "C:\\TMPM\\carpeta0\\99.Borrador\\fichero0_borrador.txt"
                }
            }
        }, {
            "_index": "job6",
            "_type": "_doc",
            "_id": "6f475ff7ac21fc59f4edc34761d09",
            "_score": 1.0,
            "_source": {
                "content": "cadena0 A\n",
                "meta": {},
                "file": {
                    "extension": "txt",
                    "content_type": "text/plain; charset=ISO-8859-1",
                    "created": "2020-04-14T09:30:20.218+0000",
                    "last_modified": "2020-04-14T09:46:02.930+0000",
                    "last_accessed": "2020-04-14T09:46:02.930+0000",
                    "indexing_date": "2020-04-14T13:56:52.223+0000",
                    "filesize": 9,
                    "filename": "fichero0_A.txt",
                    "url": "file://C:\\TMPM\\carpeta0\\fichero0_A.txt"
                },
                "path": {
                    "root": "c073f96a8d16ebb2e604bebd4fe8b40",
                    "virtual": "PM/carpeta0/fichero0_A.txt",
                    "real": "C:\\TMPM\\carpeta0\\fichero0_A.txt"
                }
            }
        }, {
            "_index": "job6",
            "_type": "_doc",
            "_id": "7dfb102f2e64e99740a89b1cff7d92a3",
            "_score": 1.0,
            "_source": {
                "content": "cadena1\n",
                "meta": {},
                "file": {
                    "extension": "txt",
                    "content_type": "text/plain; charset=ISO-8859-1",
                    "created": "2020-04-03T11:56:21.165+0000",
                    "last_modified": "2020-04-03T12:23:23.872+0000",
                    "last_accessed": "2020-04-03T12:23:23.872+0000",
                    "indexing_date": "2020-04-14T13:56:52.254+0000",
                    "filesize": 7,
                    "filename": "fichero1.txt",
                    "url": "file://C:\\TMPM\\carpeta1\\fichero1.txt"
                },
                "path": {
                    "root": "7ff4e7b0e0c3172dbd29a23861ab2125",
                    "virtual": "PM/carpeta1/fichero1.txt",
                    "real": "C:\\TMPM\\carpeta1\\fichero1.txt"
                }
            }
        }, {
            "_index": "job6",
            "_type": "_doc",
            "_id": "74f0e8c1cccf2f32b4d43673cfdca0",
            "_score": 1.0,
            "_source": {
                "content": "cadena2\n",
                "meta": {},
                "file": {
                    "extension": "txt",
                    "content_type": "text/plain; charset=ISO-8859-1",
                    "created": "2020-04-03T11:56:30.524+0000",
                    "last_modified": "2020-04-03T12:23:35.029+0000",
                    "last_accessed": "2020-04-03T12:23:35.029+0000",
                    "indexing_date": "2020-04-14T13:56:52.270+0000",
                    "filesize": 7,
                    "filename": "fichero2.txt",
                    "url": "file://C:\\TMPM\\carpeta2\\fichero2.txt"
                },
                "path": {
                    "root": "fd0c8ae8a885725cfcaee774c72be43",
                    "virtual": "PM/carpeta2/fichero2.txt",
                    "real": "C:\\TMPM\\carpeta2\\fichero2.txt"
                }
            }
        }, {
            "_index": "job6",
            "_type": "_doc",
            "_id": "8d6c56c0448bc4bfa17787923baa9c",
            "_score": 1.0,
            "_source": {
                "content": "cadenaX\n",
                "meta": {},
                "file": {
                    "extension": "txt",
                    "content_type": "text/plain; charset=ISO-8859-1",
                    "created": "2020-04-14T15:12:56.632+0000",
                    "last_modified": "2020-04-14T15:34:53.139+0000",
                    "last_accessed": "2020-04-14T15:34:53.139+0000",
                    "indexing_date": "2020-04-14T15:35:14.685+0000",
                    "filesize": 7,
                    "filename": "fichero_X.txt",
                    "url": "file://C:\\TMPM\\carpetaX\\fichero_X.txt"
                },
                "path": {
                    "root": "f43118a935c6c7ef81ea65307759fc",
                    "virtual": "PM/carpetaX/fichero_X.txt",
                    "real": "C:\\TMPM\\carpetaX\\fichero_X.txt"
                }
            }
        }
    ]
}

使用以下代码。 * 必须使用 $.getJSON *

<html>
<head>
<meta charset='UTF-8' />
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
</head>

<body>  
<script type="text/javascript"> 
$(document).ready(function(){

        var url = 'http://localhost:9200/job6/_search'

        //QUERY A                   
        var datos = 
        {   
            "query": {
                "match_all": {}
                     },
            "from" : "0", "size" : "2"
        }
        ;


        //QUERY B                       
        /*
        var datos = 
        {"query": {
                "query_string" : {
                    "query" : "fichero1.txt",
                    "default_field" : "file.filename"
                    }
                  }
        };
        */


        //QUERY C   
        /*
       var datos =                              
                    {       
                          "query": {
                                    "query_string": {                                   
                                        "query" : "fichero1.txt"            
                                                           }
                                       }
       }
       ;
       */          


        //QUERY D   
        /*
        var datos = 
        {
              "query": {
                    "simple_query_string": {
                        "all_fields" : true ,
                        "query" : "fichero1.txt"            
                                           }
                       }
        }
        ;                       
        */



        //QUERY E       
        /*
        var datos = 
        {
          "query": 
                {     "query_string": 
                    {     "query": "fichero1.txt",  "fields": ["file.filename"]      
                    }    
                }       
        }
        ;
        */


        //QUERY F   
        /*
        var datos = 
        {
             "query" : {
                "match" : {
                    "file.filename" : "fichero1.txt"
                        }
                    }
        }
        ;
        */

        var input_jsonString = JSON.stringify(datos);
        console.log("input_jsonString=" + input_jsonString);


        $.getJSON(url, datos, function (jsonFromFile) {     

        var output_jsonString = JSON.stringify(jsonFromFile);
        console.log("output_jsonString=" + output_jsonString);      

        }
    )

});      

</script>
</body>
</html>

我只收到来自以下查询 A 的响应

var datos = {
    "query": {
        "match_all": {}
    },
    "from": "0",
    "size": "2"
};

有答案

output_jsonString = {
    "took": 0,
    "timed_out": false,
    "_shards": {
        "total": 1,
        "successful": 1,
        "skipped": 0,
        "failed": 0
    },
    "hits": {
        "total": {
            "value": 5,
            "relation": "eq"
        },
        "max_score": 1,
        "hits": [{
                "_index": "job6",
                "_type": "_doc",
                "_id": "2e2ed07786c01e9fd845b62fb86a693a",
                "_score": 1,
                "_source": {
                    "meta": {},
                    "file": {
                        "extension": "txt",
                        "content_type": "text/plain",
                        "created": "2020-04-03T11:57:45.673+0000",
                        "last_modified": "2020-02-27T16:15:27.795+0000",
                        "last_accessed": "2020-04-03T11:57:45.673+0000",
                        "indexing_date": "2020-04-14T13:56:51.668+0000",
                        "filesize": 0,
                        "filename": "fichero0_borrador.txt",
                        "url": "file://C:\\TMPM\\carpeta0\\99.Borrador\\fichero0_borrador.txt"
                    },
                    "path": {
                        "root": "4cface21f575d5e5985e4e3889c278a3",
                        "virtual": "PM/carpeta0/99.Borrador/fichero0_borrador.txt",
                        "real": "C:\\TMPM\\carpeta0\\99.Borrador\\fichero0_borrador.txt"
                    }
                }
            }, {
                "_index": "job6",
                "_type": "_doc",
                "_id": "6f475ff7ac21fc59f4edc34761d09",
                "_score": 1,
                "_source": {
                    "content": "cadena0 A\n",
                    "meta": {},
                    "file": {
                        "extension": "txt",
                        "content_type": "text/plain; charset=ISO-8859-1",
                        "created": "2020-04-14T09:30:20.218+0000",
                        "last_modified": "2020-04-14T09:46:02.930+0000",
                        "last_accessed": "2020-04-14T09:46:02.930+0000",
                        "indexing_date": "2020-04-14T13:56:52.223+0000",
                        "filesize": 9,
                        "filename": "fichero0_A.txt",
                        "url": "file://C:\\TMPM\\carpeta0\\fichero0_A.txt"
                    },
                    "path": {
                        "root": "c073f96a8d16ebb2e604bebd4fe8b40",
                        "virtual": "PM/carpeta0/fichero0_A.txt",
                        "real": "C:\\TMPM\\carpeta0\\fichero0_A.txt"
                    }
                }
            }
        ]
    }

检查输入查询的值和获得的输出。我使用命令“console.log”创建了变量“input_jsonString”和“output_jsonString”。

我遇到的问题是，在以下类型的查询中，我遇到了具有相同特征的错误。在代码中命名为 QUERY B、C、..F（检查删除 cmets 代码）。例如，对于名为 C 的下一个查询

input_jsonString = {"query":{"query_string":{"query":"fichero1.txt"}}}

我收到以下错误：

 {"error":{"root_cause":[{"type":"illegal_argument_exception","reason":"request [/job6/_search] contains unrecognized parameter: [query[query_string][query]]"}],"type":"illegal_argument_exception","reason":"request [/job6/_search] contains unrecognized parameter: [query[query_string][query]]"},"status":400}

虽然之前我已经通过 Kibana 验证了所有查询都已正确编码，并且我从中得到了正确的答案，所有这些。就像查询 C 的图像一样：

请问，我犯了什么错误？

提前致谢

【问题讨论】：

标签： elasticsearch getjson

【解决方案1】：

您使用的是GET 而不是POST，因此出现异常。如果您必须使用GET，请进行查询URI-Search-friendly。

如果您需要使用 jQuery 并且无法利用官方的ES JS Client，则需要使用POST 请求，即：

$(document).ready(function () {
        var url = "http://localhost:9200/_all/_search";

        //QUERY A
        var a = {
          query: {
            match_all: {}
          },
          from: "0",
          size: "2"
        };
        //QUERY B

        var b = {
          query: {
            query_string: {
              query: "fichero1.txt",
              default_field: "file.filename"
            }
          }
        };

        //QUERY C

        var c = {
          query: {
            query_string: {
              query: "fichero1.txt"
            }
          }
        };
        //QUERY D

        var d = {
          query: {
            simple_query_string: {
              all_fields: true,
              query: "fichero1.txt"
            }
          }
        };

        //QUERY E

        var e = {
          query: {
            query_string: { query: "fichero1.txt", fields: ["file.filename"] }
          }
        };

        //QUERY F

        var f = {
          query: {
            match: {
              "file.filename": "fichero1.txt"
            }
          }
        };

        var problematic = {
          query: { query_string: { query: "fichero1.txt" } }
        };

        [a, b, c, d, e, f, problematic].map(function (query) {
          $.ajax({
            url,
            type: "post",
            data: JSON.stringify(query),
            contentType: "application/json",
            dataType: "json",
            success: function (response) {
              console.log({ query, response });
            },
            error: function (err) {
              console.error({ query, err });
            }
          });
        });
      });

仅供参考http://localhost:9200 在生产环境中几乎肯定无法访问。

【讨论】：

此外，直接从客户端调用 Elasticsearch 会带来真正的安全风险，因为它要么不安全，要么很容易获得凭据。
我成功使用了你的地图功能。我应该如何拨打电话？从我的代码调用 kibana？谢谢
没有。您应该调用一个安全（后端）端点，从而仅在该后端建立与 ES 的连接。仅供参考，“Kibana”是 ES 的 UI 界面——你不能向“Kibana”发送请求。
将"size": 100 放在查询的顶层...默认为 20，所以我想知道您得到 10...您确定过滤器不会将它们限制为10 点？