How to get HTTP response code for a URL in Java

Question

Please tell me the steps or code to get the response code of a particlular URL

User · Answer

HttpURLConnection connection    HttpURLConnection  url openConnection                connection setDoOutput true               connection setDoInput true               connection setRequestMethod  POST                     System out println  Value    connection getResponseCode                  System out println connection getResponseMessage                  System out println  content  connection getContent

User · Answer

you can use java http https url connection to get the response code from the website and other information as well here is a sample code    try                url   new URL  https   www google com       create url object for the given string               HttpURLConnection connection    HttpURLConnection  url openConnection                if https url startsWith  https                      connection    HttpsURLConnection  url openConnection                                 HttpURLConnection  connection  setRequestMethod  HEAD                connection setConnectTimeout 50000     set the timeout             connection connect      connect             String responseMessage   connection getResponseMessage      here you get the response message              responseCode   connection getResponseCode      this is http response code             System out println obj getUrl     is up  Response Code       responseMessage               connection disconnect      catch Exception e   e printStackTrace

User · Answer

HttpURLConnection   URL url   new URL  http   example com    HttpURLConnection connection    HttpURLConnection url openConnection    connection setRequestMethod  GET    connection connect     int code   connection getResponseCode      This is by no means a robust example  you ll need to handle IOExceptions and whatnot  But it should get you started   If you need something with more capability  check out HttpClient

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import java io IOException  import java net URL  import java net HttpURLConnection   public class API      public static void main String args    throws IOException               URL url   new URL  http   www google com            HttpURLConnection http    HttpURLConnection url openConnection            int statusCode   http getResponseCode            System out println statusCode

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URL url   new URL  http   www google com humans txt    HttpURLConnection http    HttpURLConnection url openConnection    int statusCode   http getResponseCode

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This is what worked for me   import java io IOException  import java net HttpURLConnection  import java net URL   public class UrlHelpers        public static int getHTTPResponseStatusCode String u  throws IOException            URL url   new URL u           HttpURLConnection http    HttpURLConnection url openConnection            return http getResponseCode              Hope this helps someone

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This is the full static method  which you can adapt to set waiting time and error code when IOException happens     public static int getResponseCode String address        return getResponseCode address  404          public static int getResponseCode String address  int defaultValue        try           Logger getLogger WebOperations class getName    info  Fetching response code at     address         URL url   new URL address         HttpURLConnection connection    HttpURLConnection  url openConnection          connection setConnectTimeout 1000   5     wait 5 seconds the most       connection setReadTimeout 1000   5         connection setRequestProperty  User-Agent    Your Robot Name          int responseCode   connection getResponseCode          connection disconnect          return responseCode        catch  IOException ex          Logger getLogger WebOperations class getName    log Level INFO   Exception at  0   1    new Object   address  ex toString            return defaultValue

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This has worked for me                import org apache http client HttpClient              import org apache http client methods HttpGet                import org apache http impl client DefaultHttpClient              import org apache http HttpResponse              import java io BufferedReader              import java io InputStreamReader                 public static void main String   args  throws Exception                              HttpClient client   new DefaultHttpClient                              args 0    http   hostname port xyz zbc                           HttpGet request1   new HttpGet args 0                            HttpResponse response1   client execute request1                           int code   response1 getStatusLine   getStatusCode                              try BufferedReader br   new BufferedReader new InputStreamReader  response1 getEntity   getContent                                        Read in all of the post results into a String                              String output                                   Boolean keepGoing   true                              while  keepGoing                                    String currentLine   br readLine                                              if  currentLine    null                                        keepGoing   false                                    else                                       output    currentLine                                                                                              System out println  Response-- gt   output                                                           catch Exception e                                 System out println  Exception  e

User · Answer

Efficient way to get data With uneven payload  by scanner   public static String getResponseFromHttpUrl URL url  throws IOException       HttpURLConnection urlConnection    HttpURLConnection  url openConnection        try           InputStream in   urlConnection getInputStream             Scanner scanner   new Scanner in           scanner useDelimiter    A        Put entire content to next token string  Converts utf8 to 16  Handles buffering for different width packets          boolean hasInput   scanner hasNext            if  hasInput                return scanner next              else               return null                  finally           urlConnection disconnect

User · Answer

Try this piece of code which is checking the 400 error messages  huc    HttpURLConnection  new URL url  openConnection      huc setRequestMethod  HEAD     huc connect     respCode   huc getResponseCode     if respCode  gt   400        System out println url   is a broken link      else       System out println url   is a valid link

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Its a old question  but lets to show in the REST way  JAX-RS    import java util Arrays  import javax ws rs           Response response   client      target  url        request        get        Looking if response is  200    201  or  202   for example  if  Arrays asList  Status OK  Status CREATED  Status ACCEPTED   contains  response getStatusInfo                lets something

User · Answer

You could try the following        class ResponseCodeCheck         public static void main  String args    throws Exception                URL url   new URL  http   google com            HttpURLConnection connection    HttpURLConnection url openConnection            connection setRequestMethod  GET            connection connect             int code   connection getResponseCode            System out println  Response code of the object is   code           if  code  200                        System out println  OK

[java] How to get HTTP response code for a URL in Java?

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