Http Basic Authentication in Java using HttpClient

Question

I am trying to mimic the functionality of this curl command in Java   curl --basic --user username password -d    http   ipaddress test login   I wrote the following using Commons HttpClient 3 0 but somehow ended up getting an 500 Internal Server Error from the server  Can someone tell me if I m doing anything wrong   public class HttpBasicAuth        private static final String ENCODING    UTF-8                    param args             public static void main String   args               TODO Auto-generated method stub         try                HttpClient client   new HttpClient                 client getState   setCredentials                      new AuthScope  ipaddress   443   realm                        new UsernamePasswordCredentials  test1    test1                                       PostMethod post   new PostMethod                       http   address test login                 post setDoAuthentication  true                 try                   int status   client executeMethod  post                    System out println status     n    post getResponseBodyAsString                   finally                      release any connection resources used by the method                 post releaseConnection                            catch  Exception e                   TODO Auto-generated catch block             e printStackTrace                            And I later tried a Commons HttpClient 4 0 1 but still the same error   import java io BufferedReader  import java io IOException  import java io InputStream  import java io InputStreamReader   import org apache http HttpEntity  import org apache http HttpResponse  import org apache http auth AuthScope  import org apache http auth UsernamePasswordCredentials  import org apache http client ClientProtocolException  import org apache http client methods HttpPost  import org apache http impl client DefaultHttpClient    public class HttpBasicAuth        private static final String ENCODING    UTF-8                    param args             public static void main String   args               TODO Auto-generated method stub          try               DefaultHttpClient httpclient   new DefaultHttpClient                 httpclient getCredentialsProvider   setCredentials                      new AuthScope AuthScope ANY HOST  AuthScope ANY PORT                        new UsernamePasswordCredentials  test1    test1                  HttpPost httppost   new HttpPost  http   host post test login                 System out println  executing request     httppost getRequestLine                 HttpResponse response              response   httpclient execute httppost               HttpEntity entity   response getEntity                 System out println  ----------------------------------------                System out println response getStatusLine                 if  entity    null                    System out println  Response content length      entity getContentLength                               if  entity    null                    entity consumeContent                               httpclient getConnectionManager   shutdown                catch  ClientProtocolException e                   TODO Auto-generated catch block             e printStackTrace              catch  IOException e                   TODO Auto-generated catch block             e printStackTrace

User · Answer

An easy way to login with a HTTP POST without doing any Base64 specific calls is to use the HTTPClient BasicCredentialsProvider  import java io IOException  import static java lang System out  import org apache http HttpResponse  import org apache http auth AuthScope  import org apache http auth UsernamePasswordCredentials  import org apache http client CredentialsProvider  import org apache http client HttpClient  import org apache http client methods HttpGet  import org apache http client methods HttpPost  import org apache http impl client BasicCredentialsProvider  import org apache http impl client HttpClientBuilder     code CredentialsProvider provider   new BasicCredentialsProvider    UsernamePasswordCredentials credentials   new UsernamePasswordCredentials user  password   provider setCredentials AuthScope ANY  credentials   HttpClient client   HttpClientBuilder create   setDefaultCredentialsProvider provider  build     HttpResponse response   client execute new HttpPost  http   address test login      Replace HttpPost with HttpGet if you need to perform a GET to login int statusCode   response getStatusLine   getStatusCode    out println  Response Code     statusCode

User · Answer

Have you tried this  using HttpClient version 4    String encoding   Base64Encoder encode user         pwd   HttpPost httpPost   new HttpPost  http   host post test login    httpPost setHeader HttpHeaders AUTHORIZATION   Basic     encoding    System out println  executing request     httpPost getRequestLine     HttpResponse response   httpClient execute httpPost   HttpEntity entity   response getEntity

User · Answer

HttpBasicAuth works for me with smaller changes   I use maven dependency    lt dependency gt       lt groupId gt net iharder lt  groupId gt       lt artifactId gt base64 lt  artifactId gt       lt version gt 2 3 8 lt  version gt   lt  dependency gt   Smaller change  String encoding   Base64 encodeBytes   user         passwd  getBytes

User · Answer

This is the code from the accepted answer above  with some changes made regarding the Base64 encoding  The code below compiles   import java io BufferedReader  import java io InputStream  import java io InputStreamReader  import java net HttpURLConnection  import java net URL   import org apache commons codec binary Base64    public class HttpBasicAuth        public static void main String   args             try               URL url   new URL   http   ip port login                 Base64 b   new Base64                String encoding   b encodeAsString new String  test1 test1   getBytes                  HttpURLConnection connection    HttpURLConnection  url openConnection                connection setRequestMethod  POST                connection setDoOutput true               connection setRequestProperty    Authorization    Basic     encoding               InputStream content    InputStream connection getInputStream                BufferedReader in                      new BufferedReader  new InputStreamReader  content                String line              while   line   in readLine       null                    System out println line                                    catch Exception e                e printStackTrace

User · Answer

while using Header array            String auth   Base64 getEncoder   encodeToString   test1 test1   getBytes     Header   headers         new BasicHeader HTTP CONTENT TYPE  ContentType APPLICATION JSON toString         new BasicHeader  Authorization    Basic    auth

User · Answer

Thanks for all answers above  but for me  I can not find Base64Encoder class  so I sort out my way anyway   public static void main String   args        try           DefaultHttpClient Client   new DefaultHttpClient             HttpGet httpGet   new HttpGet  https   httpbin org basic-auth user passwd            String encoding   DatatypeConverter printBase64Binary  user passwd  getBytes  UTF-8             httpGet setHeader  Authorization    Basic     encoding            HttpResponse response   Client execute httpGet            System out println  response       response            BufferedReader breader   new BufferedReader new InputStreamReader response getEntity   getContent              StringBuilder responseString   new StringBuilder            String line               while   line   breader readLine       null                responseString append line                     breader close            String repsonseStr   responseString toString             System out println  repsonseStr       repsonseStr          catch  IOException e            e printStackTrace               One more thing  I also tried   Base64 encodeBase64String  user passwd  getBytes       It does NOT work due to it return a string almost same with   DatatypeConverter printBase64Binary     but end with   r n   then server will return  bad request    Also following code is working as well  actually I sort out this first  but for some reason  it does NOT work in some cloud environment  sae sina com cn if you want to know  it is a chinese cloud service    so have to use the http header instead of HttpClient credentials   public static void main String   args        try           DefaultHttpClient Client   new DefaultHttpClient            Client getCredentialsProvider   setCredentials                  AuthScope ANY                  new UsernamePasswordCredentials  user    passwd                       HttpGet httpGet   new HttpGet  https   httpbin org basic-auth user passwd            HttpResponse response   Client execute httpGet            System out println  response       response            BufferedReader breader   new BufferedReader new InputStreamReader response getEntity   getContent              StringBuilder responseString   new StringBuilder            String line               while   line   breader readLine       null                responseString append line                     breader close            String responseStr   responseString toString            System out println  responseStr       responseStr          catch  IOException e            e printStackTrace

User · Answer

Here are a few points    You could consider upgrading to HttpClient 4  generally speaking  if you can  I don t think version 3 is still actively supported   A 500 status code is a server error  so it might be useful to see what the server says  any clue in the response body you re printing    Although it might be caused by your client  the server shouldn t fail this way  a 4xx error code would be more appropriate if the request is incorrect   I think setDoAuthentication true  is the default  not sure   What could be useful to try is pre-emptive authentication works better   client getParams   setAuthenticationPreemptive true      Otherwise  the main difference between curl -d    and what you re doing in Java is that  in addition to Content-Length  0  curl also sends Content-Type  application x-www-form-urlencoded  Note that in terms of design  you should probably send an entity with your POST request anyway

User · Answer

Ok so this one works  Just in case anybody wants it  here s the version that works for me       import java io BufferedReader  import java io InputStream  import java io InputStreamReader  import java net HttpURLConnection  import java net URL  import java util Base64    public class HttpBasicAuth        public static void main String   args             try               URL url   new URL   http   ip port login                String encoding   Base64 getEncoder   encodeToString   test1 test1   getBytes   UTF  -8                   HttpURLConnection connection    HttpURLConnection  url openConnection                connection setRequestMethod  POST                connection setDoOutput true               connection setRequestProperty    Authorization    Basic     encoding               InputStream content    InputStream connection getInputStream                BufferedReader in                      new BufferedReader  new InputStreamReader  content                String line              while   line   in readLine       null                    System out println line                           catch Exception e                e printStackTrace

User · Answer

A small update - hopefully useful for somebody - it works for me in my project    I use the nice Public Domain class Base64 java from Robert Harder  Thanks Robert - Code availble here  Base64 - download and put it in your package   and make a download of a file  image  doc  etc   with authentication and write to local disk   Example   import java io BufferedOutputStream  import java io File  import java io FileOutputStream  import java io InputStream  import java io OutputStream  import java net HttpURLConnection  import java net URL   public class HttpBasicAuth    public static void downloadFileWithAuth String urlStr  String user  String pass  String outFilePath        try              URL url   new URL   http   ip port download url            URL url   new URL urlStr           String authStr   user         pass          String authEncoded   Base64 encodeBytes authStr getBytes              HttpURLConnection connection    HttpURLConnection  url openConnection            connection setRequestMethod  GET            connection setDoOutput true           connection setRequestProperty  Authorization    Basic     authEncoded            File file   new File outFilePath           InputStream in    InputStream  connection getInputStream            OutputStream out   new BufferedOutputStream new FileOutputStream file            for  int b   b   in read       -1                 out write b                     out close            in close              catch  Exception e            e printStackTrace

User · Answer

for HttpClient always use HttpRequestInterceptor  for example  httclient addRequestInterceptor new HttpRequestInterceptor         public void process HttpRequest arg0  HttpContext context  throws HttpException  IOException           AuthState state    AuthState  context getAttribute ClientContext TARGET AUTH STATE           if  state getAuthScheme      null                BasicScheme scheme   new BasicScheme                CredentialsProvider credentialsProvider    CredentialsProvider  context getAttribute ClientContext CREDS PROVIDER               Credentials credentials   credentialsProvider getCredentials AuthScope ANY               if  credentials    null                    System out println  Credential  gt  gt     credentials                   throw new HttpException                              state setAuthScope AuthScope ANY               state setAuthScheme scheme               state setCredentials credentials                      0

[java] Http Basic Authentication in Java using HttpClient?

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