공공 인공지능 오픈 API·DATA 서비스 포털의 위키백과 QA API를 aws 람다로 node.js 를 이용해 slack에서 받을 수 있도록 처리했습니다.

 

전체적인 내용은 https://blog.aliencube.org/ko/2016/05/15/slack-github-integration-with-aws-lambda/ 를 참고하였습니다.

http://www.usefulparadigm.com/2016/04/06/creating-a-slack-bot-with-aws-lambda-and-api-gateway/

https://gist.github.com/sjoonk/20ae13e5cd8be88e9824e3bad11b2859

 

http://aiopen.etri.re.kr/service_list.php 

 

 

 

exports.handler = (event, context) => {

    // Sets request options

    var options = {

        host: 'aiopen.etri.re.kr',

        port: '8000',

        path: '/WikiQA',

        method: 'POST',

        headers: {

          'Content-Type': 'application/json'

        }

    };

    var access_key = '발급받은키';

    var type = 'irqa';

    // Sets the request body    

    var data = {

        'access_key': access_key,

        'argument': {

            'question': event.text,

            'type': type

        }

    };

    var request = require('http');

    var req = request.request(options, function (res) {

      var chunks = [];

    

      res.on("data", function (chunk) {

        chunks.push(chunk);

      });

    

      res.on("end", function () {

        var body = Buffer.concat(chunks);

        console.log(body.toString());

        body = JSON.parse(body);

        console.log(body.result);

        if(body.result==0){

          var text = body.return_object.WiKiInfo.IRInfo[0].sent;

          var ans = body.return_object.WiKiInfo.AnswerInfo[0].answer;

        }else{

          var text = "없음";

          var ans = event.text;

        }

          context.succeed({

            "response_type": "in_channel",

            "text": "ETRI 위키백과 QA API 결과 : " + ans,

            "attachments": [

                {

                    "text": "https://ko.wikipedia.org/wiki/" + encodeURI(ans) + "\n" + text,

                    "color": "#7CD197"

                }

            ]

          });

      });

    });

    req.write(JSON.stringify(data));

    req.end();

};

 

 

aws gateway 에서 매핑템플릿에 application/x-www-form-urlencoded 를 추가하지 않으면, json 요청 값을 처리할 수 없으니, 꼭 추가하자.

(event undefined)

## convert HTML POST data to JSON
 
## get the raw post data from the AWS built-in variable and give it a nicer name
#set($rawAPIData = $input.path('$'))

## first we get the number of "&" in the string, this tells us if there is more than one key value pair
#set($countAmpersands = $rawAPIData.length() - $rawAPIData.replace("&", "").length())
 
## if there are no "&" at all then we have only one key value pair.
## we append an ampersand to the string so that we can tokenise it the same way as multiple kv pairs.
## the "empty" kv pair to the right of the ampersand will be ignored anyway.
#if ($countAmpersands == 0)
 #set($rawPostData = $rawAPIData + "&")
#end
 
## now we tokenise using the ampersand(s)
#set($tokenisedAmpersand = $rawAPIData.split("&"))
 
## we set up a variable to hold the valid key value pairs
#set($tokenisedEquals = [])
 
## now we set up a loop to find the valid key value pairs, which must contain only one "="
#foreach( $kvPair in $tokenisedAmpersand )
 #set($countEquals = $kvPair.length() - $kvPair.replace("=", "").length())
 #if ($countEquals == 1)
  #set($kvTokenised = $kvPair.split("="))
  #if ($kvTokenised[0].length() > 0)
   ## we found a valid key value pair. add it to the list.
   #set($devNull = $tokenisedEquals.add($kvPair))
  #end
 #end
#end
 
## next we set up our loop inside the output structure "{" and "}"
{
#foreach( $kvPair in $tokenisedEquals )
  ## finally we output the JSON for this pair and append a comma if this isn't the last pair
  #set($kvTokenised = $kvPair.split("="))
 "$util.urlDecode($kvTokenised[0])" : #if($kvTokenised[1].length() > 0)"$util.urlDecode($kvTokenised[1])"#{else}""#end#if( $foreach.hasNext ),#end
#end
}