[英]AJAX Call with Elasticsearch Search
我一直試圖弄清楚如何使用jQuery AJAX調用正確地從elasticsearch請求數據。 我要么得到一個解析錯誤,要么我將得到我正在搜索的索引中的每個文檔。
$(document).ready(function() {
var timer = null;
function dicom_search() {
var box = $('#s_box').val();
$.ajax({
url: 'http://localhost:9200/dicoms/dicoms/_search',
type: 'POST',
//contentType: 'application/json; charset=UTF-8',
crossDomain: true,
dataType: 'json',
data: {
query:{match:{_all:$('#s_box').val()}},
pretty: true,
fields: '_id'
},
success: function(response) {
var data = response.hits.hits;
var doc_ids = [];
var source = null;
var content = '';
if (data.length > 0) {
for (var i = 0; i < data.length; i++) {
source = data[i].fields;
doc_ids.push(source._id);
content = content + ' ' + source._id + '<br />';
}
$('#res').removeClass('text-error').addClass('text-success').html(content);
} else {
$('#res').removeClass('text-success').addClass('text-error').html('No results found.');
}
}
});
}
$('#s_box').live('keyup', function() {
if (timer) {
clearTimeout(timer);
}
timer = setTimeout(dicom_search, 600);
});
});
這是我的錯誤:
{
"error":"SearchPhaseExecutionException[Failed to execute phase [query], total failure; shardFailures {[GUiivW0TQVSNv2HQyxu8Vw][dicoms][0]: SearchParseException[[dicoms][0]: from[-1],size[-1]: Parse Failure [Failed to parse source [_na_]]]; nested: ElasticSearchParseException[Failed to derive xcontent from org.elasticsearch.common.bytes.ChannelBufferBytesReference@779479bb]; }{[GUiivW0TQVSNv2HQyxu8Vw][dicoms][3]: SearchParseException[[dicoms][3]: from[-1],size[-1]: Parse Failure [Failed to parse source [_na_]]]; nested: ElasticSearchParseException[Failed to derive xcontent from org.elasticsearch.common.bytes.ChannelBufferBytesReference@779479bb]; }{[GUiivW0TQVSNv2HQyxu8Vw][dicoms][1]: SearchParseException[[dicoms][1]: from[-1],size[-1]: Parse Failure [Failed to parse source [_na_]]]; nested: ElasticSearchParseException[Failed to derive xcontent from org.elasticsearch.common.bytes.ChannelBufferBytesReference@779479bb]; }{[GUiivW0TQVSNv2HQyxu8Vw][dicoms][4]: SearchParseException[[dicoms][4]: from[-1],size[-1]: Parse Failure [Failed to parse source [_na_]]]; nested: ElasticSearchParseException[Failed to derive xcontent from org.elasticsearch.common.bytes.ChannelBufferBytesReference@779479bb]; }{[GUiivW0TQVSNv2HQyxu8Vw][dicoms][2]: SearchParseException[[dicoms][2]: from[-1],size[-1]: Parse Failure [Failed to parse source [_na_]]]; nested: ElasticSearchParseException[Failed to derive xcontent from org.elasticsearch.common.bytes.ChannelBufferBytesReference@779479bb]; }]",
"status":500
}
編輯:我想通了:
var data = {
query: {
match: {
_all: $('#s_box').val()
}
},
fields: '_id'
};
$.ajax({
url: 'http://localhost:9200/dicoms/dicoms/_search',
type: 'POST',
//contentType: 'application/json; charset=UTF-8',
crossDomain: true,
dataType: 'json',
data: JSON.stringify(data),
success: function(response) {
var data = response.hits.hits;
var doc_ids = [];
var source = null;
var content = '';
if (data.length > 0) {
for (var i = 0; i < data.length; i++) {
source = data[i].fields;
doc_ids.push(source._id);
content = content + ' ' + source._id + '<br />';
}
$('#res').removeClass('text-error').addClass('text-success').html(content);
} else {
$('#res').removeClass('text-success').addClass('text-error').html('No results found.');
}
},
error: function(jqXHR, textStatus, errorThrown) {
var jso = jQuery.parseJSON(jqXHR.responseText);
error_note('section', 'error', '(' + jqXHR.status + ') ' + errorThrown + ' --<br />' + jso.error);
}
});
你可以看看這里: https : //github.com/dadoonet/devoxxfr_demo/blob/gh-pages/index.html#L512
它可以幫助您解決您的問題。
我建議您使用名為Postman的工具,而不是編寫AJAX調用。 郵差有一個簡單的座右銘 -
使API開發變得簡單
因此,如果你在編寫ES請求時遇到問題,或者你決定不使用jQuery AJAX / XHR,也許你想使用cURL / Unirest / NSURL,那么你可以使用Postman請求構建器來編寫在你的簡單Http請求下,然后你會在下面的框中找到一個名為code的鏈接,你可以用你選擇的語言生成請求。 包括AJAX,是的。 所以我建議你嘗試使用它。
這是您可以從https://www.getpostman.com/postman下載Postman的鏈接
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