topic Re: Calling WFA REST api workflow using HTTP POST method from Java in Active IQ Unified Manager Discussions

Calling WFA REST api workflow using HTTP POST method from Java

dhrumins — Thu, 05 Jun 2025 06:04:28 GMT

Hey

I am trying to execute/preview a workflow from the OnCOmmand Java code.

Following is what I have:

public static void executeWfaApi(URL url) throws IOException, SAXException, ParserConfigurationException {

URL url = new URL("http://dhrumins-pc.hq.netapp.com/rest/workflows/a89ad6cf-c812-4236-9806-4dd332f47cd0/preview");

String userPassword = WFA_USERNAME + ":" + WFA_PASSWORD;

String encoding = new String(Base64.encode(userPassword.getBytes()));

HttpURLConnection connection = (HttpURLConnection) url.openConnection();

connection.setRequestProperty("Authorization", "Basic " + encoding);

* Add WFA workflow Inputs.

StringBuffer workflowInput = new StringBuffer();

workflowInput.append("<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>");

workflowInput.append("<workflowInput>");

workflowInput.append("<userInputValues>");

workflowInput.append("<userInputEntry key=\"ClusterIp\" value=\"10.226.161.198\"/>");

workflowInput.append("<userInputEntry key=\"VserverName\" value=\"dhrumins_dst_vs\"/>");

workflowInput.append("<userInputEntry key=\"VolumeName\" value=\"dhrumins_service1_dhrumins_src_vs_dhrumins_src_vol1_vaultNodeC\"/>");

workflowInput.append("</userInputValues>");

workflowInput.append("<comments>API Example Execution</comments>");

workflowInput.append("</workflowInput>");

connection.setRequestMethod("POST");

connection.setRequestProperty("Content-Type", "application/xml; charset=UTF-8");

connection.setRequestProperty("Content-Length", Integer.toString(workflowInput.length()));

connection.setUseCaches(false);

connection.setDoInput(true);

connection.setDoOutput(true);

//Send request

DataOutputStream wr = new DataOutputStream(connection.getOutputStream());

wr.writeChars(workflowInput.toString());

wr.flush();

wr.close();

BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));

String str;

while ((str = reader.readLine()) != null) {

System.out.println(str);

}

reader.close();

}

But when I execute this code, I get the HTTP 400 error:

Exception in thread "main" java.io.IOException: Server returned HTTP response code: 400 for URL: http://dhrumins-pc.hq.netapp.com/rest/workflows/a89ad6cf-c812-4236-9806-4dd332f47cd0/preview

at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1313)

at com.netapp.dfm.protect.wfa.WfaDataAccessService.executeWfaApi(WfaDataAccessService.java:119)

at com.netapp.dfm.protect.wfa.WfaDataAccessService.main(WfaDataAccessService.java:41)

So has anyone tried to call a WFA workflow using HTTP POST in java? I am suspecting that my method of creating and passing the workflow inputs might not be correct.

Thanks

Dhrumin

Re: Calling WFA REST api workflow using HTTP POST method from Java

paragp — Thu, 25 Apr 2013 06:40:19 GMT

Dhrumin, I find using the Apache Http client easier than HttpURLConnection directly. The following code snippet works for me

HttpClient client = new DefaultHttpClient();

HttpPost request = new HttpPost("http://" + server + "/rest/workflows/" + workflow.getUuid() + "/jobs");

String encodedUserNamePassword = Base64.encodeToString((userName + ":" + password).getBytes(), Base64.NO_WRAP);

request.addHeader("Authorization", "Basic " + encodedUserNamePassword);

request.addHeader("Content-type", "application/xml");

try {

request.setEntity(new StringEntity(new WorkflowInput(workflow.getUserInputs()).toXML()));

} catch (UnsupportedEncodingException e) {

e.printStackTrace();

}

HttpResponse httpResponse;

InputStream inputStream = null;

try {

httpResponse = client.execute(request);

int responseCode = httpResponse.getStatusLine().getStatusCode();

String message = httpResponse.getStatusLine().getReasonPhrase();

HttpEntity entity = httpResponse.getEntity();

if (entity != null) {

inputStream = entity.getContent();

String readFromStream = StreamUtils.readAll(inputStream);

return String.valueOf(responseCode);

}

} catch (IOException e) {

e.printStackTrace();

} finally {

try {

inputStream.close();

} catch (IOException e) {

e.printStackTrace();

}

This is the toXML method

public String toXML() {

StringBuilder sb = new StringBuilder();

sb.append("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");

sb.append("<workflowInput>");

sb.append("<userInputValues>");

for (UserInput userInput : userInputAndValues) {

sb.append("<userInputEntry ");

sb.append("key=\"").append(userInput.getName()).append("\"").append(" ");

if ("Query".equals(userInput.getType()) || "Enum".equals(userInput.getType())) {

sb.append("value=\"").append(((EditText)userInput.getView()).getText()).append("\"");

} else if ("Boolean".equals(userInput.getType())) {

sb.append("value=\"").append(((CheckBox) userInput.getView()).isChecked() == true ? "true" : "false").append("\"");

} else {

sb.append("value=\"").append(((EditText)userInput.getView()).getText()).append("\"");

}

sb.append("/>");

}

sb.append("</userInputValues>");

if (executionDateTime != null && !executionDateTime.isEmpty()) {

sb.append("<executionDateAndTime>").append(executionDateTime).append("</executionDateAndTime>");

}

if (comment != null && !comment.isEmpty()) {

sb.append("<comments>").append(comment).append("</comments>");

}

sb.append("</workflowInput>");

return sb.toString();

}