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HttpClient java.net.UnknownHostException exception when the CURL command passes

I am trying to use httpclient to make make a call to Jenkins to get a list of jobs.
When I run my code, I get an UnknownHostException.
I tried to make the same request using curl and I was able to get the result. I am not sure how to interpret this.
void nwe() throws ClientProtocolException, IOException {
HttpHost target = new HttpHost("https://<JENKINS_URL>/api");
CredentialsProvider credsProvider = new BasicCredentialsProvider();
credsProvider.setCredentials(
new AuthScope(target.getHostName(), target.getPort()),
new UsernamePasswordCredentials("username", "password"));
CloseableHttpClient httpclient = HttpClients.custom().setDefaultCredentialsProvider(credsProvider).build();
HttpGet httpGet = new HttpGet("/json");
httpGet.setHeader("Content-type", "application/json");
BasicScheme basicAuth = new BasicScheme();
HttpClientContext localContext = HttpClientContext.create();
CloseableHttpResponse response1 = httpclient.execute(target, httpGet, localContext);
System.out.println(response1.getStatusLine());
}
The CURL command on the same URL gives me the expected output
Thanks,
Amar

Read the JavaDoc for HttpHost:
Parameters: hostname - the hostname (IP or DNS name)
So you should use just (omit the protocol and context):
HttpHost target = new HttpHost( "<JENKINS_URL>" );
and then HttpGet the /api/json part.
Cheers,

httpclient.execute(httppost) doesn't work？

I use httpclient to post img to website.
But I have tucked it into httpclient.execute(httppost).
In my local environment , I run it perfect. But when i publish project to SinaAppEngine（Java Local IO
restricted）->sae ,execute method doesn't work because code like this:
reqEntity.addPart("image", byteArrayBody);
(Stringbody run normally )
My sample code:
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://r.catchoom.com/v1/search");
ByteArrayBody byteArrayBody = new ByteArrayBody(imgByte, "test.jpg");
MultipartEntity reqEntity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
reqEntity.addPart("image", byteArrayBody);
httppost.setEntity(reqEntity);
HttpResponse response = httpclient.execute(httppost);

How to resolve org.apache.http.conn.ConnectTimeoutException in Android?

I am working on service related application.
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpParams params = httpClient.getParams();
HttpConnectionParams.setConnectionTimeout(params, 10000000);
HttpConnectionParams.setSoTimeout(params, 15000000);
HttpProtocolParams.setUseExpectContinue(httpClient.getParams(),true);
String str_Server_Host = Control_PWD_Server_Name();
String requestEnvelope = String.format(envelope_oe);
// HttpPost httpPost = new HttpPost(str_Server_Host);
HttpPost httpPost = new HttpPost(str_Server_Host);
httpPost.setHeader("SOAPAction",
"http://tempuri.org/updateTransportStatus");
httpPost.setHeader("Content-Type", "text/xml;charset=utf-8");
httpPost.setEntity(new StringEntity(requestEnvelope));
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
line = EntityUtils.toString(httpEntity);
String str = Html.fromHtml(line).toString();
This is the exception I am getting:
org.apache.http.conn.ConnectTimeoutException: Connect to /10.64.0.184:9092 timed out
How to resolve above exception in android? please give any suggestion or related senario.

NTLM authentication java via HttpClient

My problem is i'm trying to get into scopus using a crawler but it requires my crawler to enter the site through my school proxy server. I tried authenticating but it keep responding with 401 status.
public void testConnection() throws ClientProtocolException, IOException {
DefaultHttpClient httpclient = new DefaultHttpClient();
List<String> authpref = new ArrayList<String>();
authpref.add(AuthPolicy.NTLM);
httpclient.getParams().setParameter(AuthPNames.TARGET_AUTH_PREF, authpref);
NTCredentials creds = new NTCredentials("username","password","ezlibproxy1.ntu.edu.sg","ntu.edu.sg");//this is correct
httpclient.getCredentialsProvider().setCredentials(AuthScope.ANY, creds);
HttpHost target = new HttpHost("ezlibproxy1.ntu.edu.sg", 443, "https");//this is correct
// Make sure the same context is used to execute logically related requests
HttpContext localContext = new BasicHttpContext();
// Execute a cheap method first. This will trigger NTLM authentication
HttpGet httpget = new HttpGet("http://www-scopus-com.ezlibproxy1.ntu.edu.sg/authid/detail.url?authorId=14831850700");
HttpResponse response = httpclient.execute(target, httpget, localContext);
HttpEntity entity = response.getEntity();
System.out.println(EntityUtils.toString(entity));
int statusCode = response.getStatusLine().getStatusCode();
System.out.println("Status Code:" + statusCode);
}
The status code respond is 401 (unauthorised).
Any suggestion on this?

How to Handle the Session in Apache HttpClient 4.1

I am using the HttpClient 4.1.1 to test my server's REST API.
I can manage to login seem to work fine but when I try to do anything else I am failing.
Most likely I have a problem setting the cookie in the next request.
Here is my code currently:
HttpGet httpGet = new HttpGet(<my server login URL>);
httpResponse = httpClient.execute(httpGet)
sessionID = httpResponse.getFirstHeader("Set-Cookie").getValue();
httpGet.addHeader("Cookie", sessionID);
httpClient.execute(httpGet);
Is there a better way to manage the session/cookies setting in the HttpClient package?

The correct way is to prepare a CookieStore which you need to set in the HttpContext which you in turn pass on every HttpClient#execute() call.
HttpClient httpClient = new DefaultHttpClient();
CookieStore cookieStore = new BasicCookieStore();
HttpContext httpContext = new BasicHttpContext();
httpContext.setAttribute(HttpClientContext.COOKIE_STORE, cookieStore);
// ...
HttpResponse response1 = httpClient.execute(method1, httpContext);
// ...
HttpResponse response2 = httpClient.execute(method2, httpContext);
// ...