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  1. Jenkins
  2. JENKINS-66035

Unable to get json via URL.openConnection.

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    Details

    • Type: Bug
    • Status: Open (View Workflow)
    • Priority: Minor
    • Resolution: Unresolved
    • Component/s: core
    • Labels:
      None
    • Environment:
      Ubuntu 18.04LTS (amd64)
      Jenkins 2.277.4
      AdoptOpenJDK 11
    • Similar Issues:

      Description

      I'm trying to write a shared library function that gets json from one of our servers. I'm able to open a connection, I get a 200 result but when I try to read the body I get an empty result.

      If I try this same thing in the groovyConsole, or groovy command line, it works as I would expect.

      Below is the groovy code I'm using; with an example call. I should note that the URL I'm using is not the URL data I'm trying to fetch but it's being used as an example URL.

        protected String getJSON(String url, Map params = [:]) {
          int timeout = params['timeout'] ?: 300
      
          HttpURLConnection c = null;
          try {
            URL u = new URL(url);
            c = (HttpURLConnection) u.openConnection();
            c.setRequestMethod('GET');
            c.setUseCaches(false);
            c.setAllowUserInteraction(false);
            c.setConnectTimeout(timeout);
            c.setReadTimeout(timeout);
            c.setDoOutput(true)
            c.setDoInput(true)
            c.setRequestProperty('Content-Type', 'application/json; charset=UTF-8')
            c.connect();
      
            int status = c.getResponseCode();
      
            StringBuilder stringBuilder = new StringBuilder()
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(c.getInputStream()))
            String inputLine
            while ((inputLine = bufferedReader.readLine()) != null) {
              stringBuilder.append(inputLine)
            }
            bufferedReader.close()
      
            if (stringBuilder.length() > 0) {
              return stringBuilder.toString()
            }
          }
          catch (MalformedURLException ex) {
            LOGGER.severe(ex)
          }
          catch (IOException ex) {
            LOGGER.severe(ex)
          }
          finally {
            if (c != null) {
              try {
                c.disconnect();
              }
              catch (Exception ex) {
                LOGGER.severe(ex)
              }
            }
          }
          return null;
        }
      
      getJSON("https://jenkins.<my local domain>.com/api/json")
      

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          Activity

          mdelaney Mike Delaney created issue -

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            Assignee:
            Unassigned Unassigned
            Reporter:
            mdelaney Mike Delaney
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              Dates

              Created:
              Updated: