Error occurred when requesting STH-Comet with sth-source-operator from Wirecloud.

Hi @aarranz Cc: @fgalan

I encountered Invalid cookie value error when requesting STH-Comet with sth-source-operator from Wirecloud.

Response received from STH:

response: "{"statusCode":400,"error":"Bad Request","message":"Invalid cookie value"}"

STH log:

time=2019-02-09T23:25:50.720Z | lvl=WARN | corr=c0a1a597-38f8-488b-b430-7848962341b7 | trans=c0a1a597-38f8-488b-b430-7848962341b7 | op=OPER_STH_GET | from=n/a | srv=test | subsrv=/ | comp=STH | msg=GET /STH/v1/contextEntities/type/Room/id/Room1/attributes/temperature?hLimit=30&hOffset=0, event={"request":"1549754750690:sth-comet:15:jry3yn1l:10000","timestamp":1549754750703,"tags":["state","error"],"data":{"header":"_ga=GA1.2.1613225138.1529842581, _csrf=CxfXpBBwOkX5NWWoxkOJyl1Z, _gid=GA1.2.2115011858.1549664031","errors":[{"name":"_ga","value":"GA1.2.1613225138.1529842581, _csrf=CxfXpBBwOkX5NWWoxkOJyl1Z, _gid=GA1.2.2115011858.1549664031","settings":{"strictHeader":true,"ignoreErrors":false,"isSecure":true,"isHttpOnly":true,"isSameSite":"Strict","path":null,"domain":null,"ttl":null,"encoding":"none"},"reason":"Invalid cookie value"}]},"internal":true}

I checked a request header which Wirecloud sent to STH. It seems that cookie is a cause of this error.

host : 127.0.0.1:8999
connection : close
user-agent : Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36
accept-encoding : gzip, deflate, br
accept : text/javascript, text/html, application/xml, text/xml, */*
x-real-ip : 192.168.11.70
x-forwarded-for : 192.168.11.70, 172.20.0.1
fiware-service : test
fiware-servicepath : /
x-requested-with : XMLHttpRequest
referer : https://mashup.lab.fisuda.jp/kz-suda/sth
accept-language : ja,en;q=0.9
via : 1.0 mashup.lab.fisuda.jp (Wirecloud-python-Proxy/1.1)
cookie : _ga=GA1.2.1613225138.1529842581, _csrf=CxfXpBBwOkX5NWWoxkOJyl1Z, _gid=GA1.2.2115011858.1549664031

Workaround 1: I added failAction to lib/server/sthServer.js in fiware-sth-comet. I was able to avoid this error. https://github.com/telefonicaid/fiware-sth-comet/blob/master/lib/server/sthServer.js

  server.route([
    {
      method: 'GET',
      path: '/STH/v1/contextEntities/type/{entityType}/id/{entityId}/attributes/{attrName}',
      handler: sthGetDataHandler,
      config: {
        validate: {
          headers: sthHeaderValidator,
          query: {
            lastN: joi.number().integer().greater(-1).optional(),
            hLimit: joi.number().integer().greater(-1).optional(),
            hOffset: joi.number().integer().greater(-1).optional(),
            aggrMethod: joi.string().valid('max', 'min', 'sum', 'sum2', 'occur').optional(),
            aggrPeriod: joi.string().required().valid('month', 'day', 'hour', 'minute', 'second').optional(),
            dateFrom: joi.date().optional(),
            dateTo: joi.date().optional(),
            filetype: joi.string().optional(),
            count: joi.boolean().optional()
          }

        },
        state: {
           "parse": true,
           "failAction": "ignore"
        }
      }
    },

Workaround 2 : I made a tiny proxy server for cutting in a request from Wirecloud to STH. It rewrites as a request header with only 'fiware-service' and 'fiware-servicepath'. It works well. No error occurred. https://github.com/fisuda/debug.sth.proxy
System Environment :
- Wirecloud 1.2.0
- STH source operator (HEAD)
- sth-comet 2.5.0
Similar issue : https://github.com/telefonicaid/fiware-sth-comet/issues/418
Question : Please give me advice on how to deal with this issue.

Thank you in advance.

Wirecloud / wirecloud

Error occurred when requesting STH-Comet with sth-source-operator from Wirecloud. #376