I have developed a simple java program to fetch the data of issues/user stories. I want to fetch 'description' field of a perticular issue. I have used GET method to get response but I'm getting errors while connecting to JIRA.
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
public class JiraIssueDescription {
public static void main(String[] args) {
try {
URL url = new URL("https://****.atlassian.net/rest/agile/1.0/issue/41459");
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("GET");
conn.setRequestProperty("Accept", "application/json");
conn.setRequestProperty("username", "***@abc.com");
conn.setRequestProperty("password", "****");
if (conn.getResponseCode() != 200) {
throw new RuntimeException("Failed : HTTP error code : "
+ conn.getResponseCode());
}
BufferedReader br = new BufferedReader(new InputStreamReader(
(conn.getInputStream())));
String output;
System.out.println("Output from Server .... \n");
while ((output = br.readLine()) != null) {
System.out.println(output);
}
conn.disconnect();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
When I run the project I get following error
java.net.UnknownHostException: ****.atlassian.net
at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at sun.security.ssl.SSLSocketImpl.connect(Unknown Source)
at sun.security.ssl.BaseSSLSocketImpl.connect(Unknown Source)
at sun.net.NetworkClient.doConnect(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.protocol.https.HttpsClient.<init>(Unknown Source)
at sun.net.www.protocol.https.HttpsClient.New(Unknown Source)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at java.net.HttpURLConnection.getResponseCode(Unknown Source)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
at com.JiraIntegration.bean.JiraIssueDescription.main(JiraIssueDescription.java:24)
Can anyone please help me with the errors. Do I need to implement OAuth ?
UnknownHostException looks like you have a typo in your URL or are facing some proxy issues .
Does it work in your Browser? It should give you some json in response. Like this: https://jira.atlassian.com/rest/api/2/issue/JSWCLOUD-11658
You could also test with other tools like curl. Does it work?
curl https://jira.atlassian.com/rest/api/2/issue/JSWCLOUD-11658
Atlassian rest API provides two authentication methods, Basic auth and Oauth. Use this approach to create a valid basic auth header or try the request without parameters.
The following code demonstrates how it should work:
package stack48618849;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.charset.StandardCharsets;
import java.util.Base64;
import org.junit.Test;
public class HowToReadFromAnURL {
@Test
public void readFromUrl() {
try (InputStream in = getInputStreamFromUrl("https://jira.atlassian.com/rest/api/2/issue/JSWCLOUD-11658")) {
System.out.println(convertInputStreamToString(in));
} catch (Exception e) {
throw new RuntimeException(e);
}
}
@Test(expected = RuntimeException.class)
public void readFromUrlWithBasicAuth() {
String user="aUser";
String passwd="aPasswd";
try (InputStream in = getInputStreamFromUrl("https://jira.atlassian.com/rest/api/2/issue/JSWCLOUD-11658",user,passwd)) {
System.out.println(convertInputStreamToString(in));
} catch (Exception e) {
System.out.println("If basic auth is provided, it should be correct: "+e.getMessage());
throw new RuntimeException(e);
}
}
private InputStream getInputStreamFromUrl(String urlString,String user, String passwd) throws IOException {
URL url = new URL(urlString);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("GET");
conn.setRequestProperty("Accept", "application/json");
String encoded = Base64.getEncoder().encodeToString((user+":"+passwd).getBytes(StandardCharsets.UTF_8));
conn.setRequestProperty("Authorization", "Basic "+encoded);
return conn.getInputStream();
}
private InputStream getInputStreamFromUrl(String urlString) throws IOException {
URL url = new URL(urlString);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("GET");
conn.setRequestProperty("Accept", "application/json");
return conn.getInputStream();
}
private String convertInputStreamToString(InputStream inputStream) throws IOException {
ByteArrayOutputStream result = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int length;
while ((length = inputStream.read(buffer)) != -1) {
result.write(buffer, 0, length);
}
return result.toString("UTF-8");
}
}
This prints:
{"expand":"renderedFields,names,schema,operations,editmeta,changelog,versionedRepresentations","id":"789521","self":"https://jira.atlassian.com/rest/api/2/issue/789521","key":"JSWCLOUD-11658","fields":{"customfield_18232":...
If basic auth is provided, it should be correct: Server returned HTTP response code: 401 for URL: https://jira.atlassian.com/rest/api/2/issue/JSWCLOUD-11658