iisnode encountered an error when processing the request.

HRESULT: 0x6d
HTTP status: 500
HTTP subStatus: 1013
HTTP reason: Internal Server Error

You are receiving this HTTP 200 response because system.webServer/iisnode/@devErrorsEnabled configuration setting is 'true'.

In addition to the log of stdout and stderr of the node.exe process, consider using debugging and ETW traces to further diagnose the problem.

The last 64k of the output generated by the node.exe process to stderr is shown below:

response.headers:text/plain; charset=utf-8
SAVE_PATH : http://datacenter.taichung.gov.tw/odd_file/DsTo/e37a2b2f-f0a3-44b2-85f0-6ff7b3083143/2016_04_10951-01-06-2_臺中市警察人員職員退休、資遣、撫卹人數.csv
SAVE_PATH : http://datacenter.taichung.gov.tw/odd_file/DsTo/56874583-9658-43fb-8b7a-ad0f5885cf71/2017_04_30280-07-01-2_臺中市政府一級機關一般公文統計表.json
SAVE_PATH : http://datacenter.taichung.gov.tw/odd_file/DsTo/350c6c2d-643f-430f-a470-c0db27cd9148/2017_04_20490-90-01-2_臺中市水電、天然氣、電氣技術人員登記統計表.csv
Application has thrown an uncaught exception and is terminated:
Error: Unable to determine the domain name
    at new ClientRequest (_http_client.js:85:13)
    at Object.request (http.js:38:10)
    at Object.http_download (C:\Website\NodejsSwagger\express\api\download_file.js:375:30)
    at IncomingMessage.response.on (C:\Website\NodejsSwagger\express\api\download_file.js:493:22)
    at emitNone (events.js:111:20)
    at IncomingMessage.emit (events.js:208:7)
    at endReadableNT (_stream_readable.js:1055:12)
    at _combinedTickCallback (internal/process/next_tick.js:138:11)
    at process._tickCallback (internal/process/next_tick.js:180:9)