我尝试按照以下问题给出答案中的说明:
How to index a pdf file in Elasticsearch 5.0.0 with ingest-attachment plugin?
我无法找到很多ElasticSearch的JavaScript客户端示例,所以我的内容就是:
创建索引
// elasticsearch Client
var elasticsearch = require('elasticsearch');
var client = new elasticsearch.Client({hosts: [ 'http://localhost:9200/']});
// Create index
client.create({index: 'pdfs', type: 'pdf', id: 'my-index-id',
body: {description: 'Test pdf indexing'}
})
.then(function () {console.log("Index created");})
.catch(function (error) {console.log(error);});
定义节点中的索引映射:
var body = {
pdf:{
properties:{
title : {"type" : "keyword", "index" : "false"},
type : {"type" : "keyword", "index" : "false"},
"attachment.pdf" : {"type" : "keyword"}
}
}
}
client.indices.putMapping({index:"pdfs", type:"pdf", body:body})
.then((response) => {addPipeline()})
.catch((error) => {console.log("putMapping error: " + error)})
使用PUT API在节点集群中定义摄取管道
function addPipeline(){
client.ingest.putPipeline({
id: 'my-pipeline-id',
body: {
"description" : "parse pdfs and index into ES",
"processors" : [
{ "attachment" : { "field" : "pdf", "indexed_chars" : -1 } },
{ "remove" : { "field" : "pdf" } }
]
}
})
.then(function () {
console.log("putPipeline Resolved");
})
.catch(function (error) {
console.log("putPipeline error: " + error);
});
};
在我尝试上传PDF之前,我检查了索引是否已创建:
curl -XGET 'localhost:9200/_cat/indices?v&pretty'
结果:
health status index uuid pri rep docs.count docs.deleted store.size pri.store.size
yellow open .kibana EaUbEQCETVKQbYThrhPGaA 1 1 1 0 3.6kb 3.6kb
yellow open pdfs Z2SR-ApFR9SYsvY08tgSZw 5 1 1 0 4.6kb 4.6kb
当我尝试使用以下命令索引PDF 时,出现错误。
curl -H 'Content-Type: application/pdf' -XPUT 'localhost:9200/my_index/my_type/id?pipeline=my-pipeline-id' -d'
{
"pdf": @/Users/user/path/to/pdf/file.pdf
}'
错误:
{"error":"Content-Type header [application/pdf] is not supported","status":406}
这是因为我的PDF不是Base64编码的,还是我做错了什么?我正在尝试创建一个数字图书馆来搜索PDF文件。
我用以下代码编写了我的pdf:
openssl base64 -in /Users/user/path/to/pdf/file.pdf -out base64_encoded_file
重新创建索引并在base64_encoded_file上运行以下命令:
curl -H 'Content-Type: application/json' -XPUT 'localhost:9200/my_index/my_type/id?pipeline=my-pipeline-id' -d @/base64_encoded_file
我收到以下错误:
Warning: Couldn't read data from file "/base64_encoded_file", this makes an empty POST.
{"error":{"root_cause":[{"type":"parse_exception","reason":"request body is required"}],"type":"parse_exception","reason":"request body is required"},"status":400}
我尝试将文件添加为正文:
curl -H 'Content-Type: application/json' -XPUT 'localhost:9200/my_index/my_type/id?pipeline=my-pipeline-id' -d '
{
"pdf" : @/base64_encoded_file
}'
错误:
{"error":{"root_cause":[{"type":"parse_exception","reason":"Failed to parse content to map"}],"type":"parse_exception","reason":"Failed to parse content to map","caused_by":{"type":"json_parse_exception","reason":"Unexpected character ('@' (code 64)): expected a valid value (number, String, array, object, 'true', 'false' or 'null')\n at [Source: org.elasticsearch.transport.netty4.ByteBufStreamInput@6db5a3dc; line: 3, column: 16]"}},"status":400}
HALP
答案 0 :(得分:2)
我找到了问题的答案:
Elasticsearch不从源中获取数据,
curl -H 'Content-Type: application/json' -XPUT 'localhost:9200/my_index/my_type/id?pipeline=my-pipeline-id' -d '
{
"pdf" : @/base64_encoded_file
}'
没有工作。 "字段"来自attachment options(在我的例子中," pdf")必须是数据,而不是文件路径。 This主题解释了将[pdf]内容发送到elasticsearch的三个选项:
简而言之,传递给elasticsearch的数据必须符合documentation。
中的定义curl -H 'Content-Type: application/json' -XPUT 'localhost:9200/my_index/my_type/id?pipeline=my-pipeline-id' -d '
{
"pdf" : "base64_encoded_data"
}'