js中的正则表达式 使用Docker和Elasticsearch搭建全文本搜索引(11)

})

// Set permissive CORS header

app.use( async(ctx, next) => {

ctx.set( 'Access-Control-Allow-Origin', '*')

returnnext()

})

// ADD ENDPOINTS HERE

constport = process.env.PORT || 3000

app

.use(router.routes())

.use(router.allowedMethods())

.listen(port, err => {

if(err) throwerr

console.log( `App Listening on Port ${port}`)

})

这段代码导入服务依赖环境，为Koa.js Node API Server设置简单日志和错误处理机制。

6.1 将服务端点与查询链接起来

这一节为Server端添加服务端点，以便暴露给Elasticsearch查询服务。

在server/app.js中//ADD ENDPOINTS HERE 之后插入如下代码：

/**

* GET /search

* Search for a term in the library

*/

router. get( '/search', async(ctx, next) => {

const{ term, offset } = ctx.request.query

ctx.body = awaitsearch.queryTerm(term, offset)

}

)

用docker-compose up -d --build重启服务端。在浏览器中，调用此服务。例如::3000/search?term=java。

返回结果看起来应该如下：

{

"took": 242,

"timed_out": false,

"_shards": {

"total": 5,

"successful": 5,

"skipped": 0,

"failed": 0

},

"hits": {

"total": 93,

"max_score": 13.356944,

"hits": [{

"_index": "library",

"_type": "novel",

"_id": "eHYHJmEBpQg9B4622421",

"_score": 13.356944,

"_source": {

"author": "Charles Darwin",

"title": "On the Origin of Species",

"location": 1080,

"text": "Java, plants of, 375."

},

"highlight": {

"text": [ "<em>Java</em>, plants of, 375."]

}

}, {

"_index": "library",

"_type": "novel",

"_id": "2HUHJmEBpQg9B462xdNg",

"_score": 9.030668,

"_source": {

"author": "Unknown Author",

"title": "The King James Bible",

"location": 186,

"text": "10:4 And the sons of Javan; Elishah, and Tarshish, Kittim, and Dodanim."

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