Apache Http Digest Authentication using Java - java

I am currently working on a Java project and I can't get the http digest authentication working. I tried using the Apache website, but it didn't help. I have a site that requires HTTP digest authentication.
DefaultHttpClient httpclient = new DefaultHttpClient();
String hostUrl = "http://somewebsite.com";
String postUrl = "http://somewebsite.com/request";
HttpPost httpPost = new HttpPost(postUrl);
String username = "hello";
String password = "world";
HttpHost targetHost = new HttpHost(hostUrl);
httpclient.getCredentialsProvider().setCredentials(
new AuthScope(hostUrl, AuthScope.ANY_PORT),
new UsernamePasswordCredentials(username, password));
AuthCache authCache = new BasicAuthCache();
DigestScheme digestAuth = new DigestScheme();
digestAuth.overrideParamter("realm", "some realm");
digestAuth.overrideParamter("nonce", "whatever");
authCache.put(targetHost, digestAuth);
BasicHttpContext localcontext = new BasicHttpContext();
localcontext.setAttribute(ClientContext.AUTH_CACHE, authCache);
// List<NameValuePair> nvps = new ArrayList<NameValuePair>();
// nvps.add(new BasicNameValuePair("username", "shirwa99#gmail.com"));
// nvps.add(new BasicNameValuePair("password", "example"));
// httpPost.setEntity(new UrlEncodedFormEntity(nvps));
HttpResponse response2 = httpclient.execute(httpPost);


This code works for me pretty well:
protected static void downloadDigest(URL url, FileOutputStream fos)
throws IOException {
HttpHost targetHost = new HttpHost(url.getHost(), url.getPort(), url.getProtocol());
CloseableHttpClient httpClient = HttpClients.createDefault();
HttpClientContext context = HttpClientContext.create();
String credential = url.getUserInfo();
if (credential != null) {
String user = credential.split(":")[0];
String password = credential.split(":")[1];
CredentialsProvider credsProvider = new BasicCredentialsProvider();
credsProvider.setCredentials(AuthScope.ANY,
new UsernamePasswordCredentials(user, password));
AuthCache authCache = new BasicAuthCache();
DigestScheme digestScheme = new DigestScheme();
authCache.put(targetHost, digestScheme);
context.setCredentialsProvider(credsProvider);
context.setAuthCache(authCache);
}
HttpGet httpget = new HttpGet(url.getPath());
CloseableHttpResponse response = httpClient.execute(targetHost, httpget, context);
try {
ReadableByteChannel rbc = Channels.newChannel(response.getEntity().getContent());
fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
} finally {
response.close();
}
}


try this code from apache httpClient 4.3.3
final HttpHost targetHost = new HttpHost("localhost", 8080, "http");
final CredentialsProvider credsProvider = new BasicCredentialsProvider();
credsProvider.setCredentials(AuthScope.ANY,
new UsernamePasswordCredentials(user, password));
final AuthCache authCache = new BasicAuthCache();
DigestScheme digestAuth = new DigestScheme();
digestAuth.overrideParamter("realm", "some-realm");
digestAuth.overrideParamter("nonce", "whatever");
authCache.put(targetHost, digestAuth);
// Add AuthCache to the execution context
HttpClientContext context = HttpClientContext.create();
context.setAuthCache(authCache);
HttpGet httpget = new HttpGet("/");
CloseableHttpResponse response = httpclient.execute(targetHost , httpget, context );
Please can you give me the site which requires HTTP digest authentication?


Tipp: do not use HTTP Digest :) It is not secure at all. Over HTTPS it has not point.
If you must, below is a code that works with parsing the WWW-Authenticate header.
This is tested with the following dependency (i use gradle):
compile group: 'org.apache.httpcomponents', name: 'httpclient', version: '4.5.6'
The code:
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import org.apache.http.Header;
import org.apache.http.HttpHost;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.MalformedChallengeException;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.AuthCache;
import org.apache.http.client.CredentialsProvider;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.protocol.HttpClientContext;
import org.apache.http.impl.auth.DigestScheme;
import org.apache.http.impl.client.BasicAuthCache;
import org.apache.http.impl.client.BasicCredentialsProvider;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
public class DigestExample {
private final static String uri = "http://my.digest.based.auth.url.com";
private static HttpHost target;
public static void main(String[] args) throws IOException {
setup();
if (target == null) {
System.out.println("Setup was unsuccesfull");
return;
}
Header challengeHeader = getAuthChallengeHeader();
if (challengeHeader == null) {
System.out.println("Setup was unsuccesfull");
return;
}
// NOTE: challenge is reused for subsequent HTTP GET calls (typo corrected)
getWithDigestAuth(challengeHeader, "/", "/schema");
}
private static void setup() throws MalformedURLException {
URL url = new URL(uri);
target = new HttpHost(url.getHost(), url.getPort(), url.getProtocol());
}
private static Header getAuthChallengeHeader() {
try (CloseableHttpClient httpClient = HttpClients.createDefault()) {
CloseableHttpResponse response = httpClient.execute(new HttpGet(uri));
return response.getFirstHeader("WWW-Authenticate");
} catch (IOException e) {
e.printStackTrace();
return null;
}
}
private static void getWithDigestAuth(Header challengeHeader, String... requests)
throws IOException {
CredentialsProvider credsProvider = new BasicCredentialsProvider();
credsProvider.setCredentials(
new AuthScope(target.getHostName(), target.getPort()),
new UsernamePasswordCredentials("user", "pass"));
try (CloseableHttpClient httpclient = HttpClients.custom()
.setDefaultCredentialsProvider(credsProvider)
.build()) {
// Create AuthCache instance
AuthCache authCache = new BasicAuthCache();
// Generate DIGEST scheme object, initialize it and add it to the local
// auth cache
DigestScheme digestAuth = new DigestScheme();
digestAuth.processChallenge(challengeHeader);
authCache.put(target, digestAuth);
// Add AuthCache to the execution context
HttpClientContext localContext = HttpClientContext.create();
localContext.setAuthCache(authCache);
for (String request : requests) {
System.out.println("Executing request to target " + target + request);
try (CloseableHttpResponse response = httpclient
.execute(target, new HttpGet(request), localContext)) {
System.out.println("----------------------------------------");
System.out.println(response.getStatusLine());
System.out.println(EntityUtils.toString(response.getEntity()));
} catch (Exception e) {
System.out.println("Error while executing HTTP GET request");
e.printStackTrace();
}
}
} catch (MalformedChallengeException e) {
e.printStackTrace();
}
}
}


Try this code from Apache :
public static void main(String[] args) throws Exception {
HttpClient client = new HttpClient();
client.getState().setCredentials(
new AuthScope("myhost", 80, "myrealm"),
new UsernamePasswordCredentials("username", "password"));
// Suppose the site supports several authetication schemes: NTLM and Basic
// Basic authetication is considered inherently insecure. Hence, NTLM authentication
// is used per default
// This is to make HttpClient pick the Basic authentication scheme over NTLM & Digest
List authPrefs = new ArrayList(3);
authPrefs.add(AuthPolicy.BASIC);
authPrefs.add(AuthPolicy.NTLM);
authPrefs.add(AuthPolicy.DIGEST);
client.getParams().setParameter(AuthPolicy.AUTH_SCHEME_PRIORITY, authrefs);
GetMethod httpget = new GetMethod("http://myhost/protected/auth-required.html");
try {
int status = client.executeMethod(httpget);
// print the status and response
System.out.println(httpget.getStatusLine());
System.out.println(httpget.getResponseBodyAsString());
} finally {
// release any connection resources used by the method
httpget.releaseConnection();
}
}

Related

Apache HttpClient 4.0.1- HttpPut No content to map due to end-of-input\n Error

I have a spring restful api and, I am trying to do the update over restful api using HttpPut method with Apache HttpClient 4.0.1 as below
import groovy.json.JsonBuilder
import org.apache.http.client.methods.HttpPut
import org.apache.http.entity.StringEntity
import groovy.json.JsonSlurper
import org.apache.commons.io.output.ByteArrayOutputStream;
def httpConnector = applicationContext.getBean('httpConnector')
String apiURL = "https://localhost:7443/api/ruleConfigurations/29"
def putRequest = new HttpPut(apiURL);
def testJson = new JsonBuilder()
root = testJson name: "test_name", displayName: "test_display_name", active: "false" , value: "test_value"
println "testJson = "+testJson.toString()
def stringEntity = new StringEntity(testJson.toString());
putRequest.setHeader("Accept", "application/json");
putRequest.setHeader("Content-type", "application/json");
def httpClient = httpConnector.getHttpClient()
def putResponse = httpClient.execute(putRequest)
def resCode = putResponse.getStatusLine().getStatusCode()
if(resCode==200){
println "succesfully updated Rule config"
}
else {
println "Response Code = ${resCode} Error in updating Rule config"
println "error message = "+getResponseData(putResponse)
}
def getResponseData(def response) throws java.io.IOException {
byte[] responseData
InputStream responseStream = response.getEntity().getContent()
try {
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream()
byteArrayOutputStream.write(responseStream)
responseData = byteArrayOutputStream.toByteArray()
} finally {
responseStream.close()
}
return new String(responseData,'utf-8')
}
Below is the method for httpConnector.getHttpClient()
private DefaultHttpClient getHttpClient() {
if (httpClient != null) return httpClient;
final int MAX_CONNECTIONS = 300;
CookieStore cookieStore = new BasicCookieStore();
httpContext = new BasicHttpContext();
httpContext.setAttribute(ClientContext.COOKIE_STORE, cookieStore);
HttpParams params = new BasicHttpParams();
ConnManagerParams.setMaxTotalConnections(params,MAX_CONNECTIONS);
ConnManagerParams.setTimeout(params, 20000);
HttpConnectionParams.setSoTimeout(params, 240000);
HttpConnectionParams.setConnectionTimeout(params,30000);
ConnPerRouteBean connPerRoute = new ConnPerRouteBean(MAX_CONNECTIONS);
ConnManagerParams.setMaxConnectionsPerRoute(params, connPerRoute);
SchemeRegistry schemeRegistry = new SchemeRegistry();
schemeRegistry.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 8080));
schemeRegistry.register(new Scheme("https", getSockectFactory(), 8443));
ClientConnectionManager cm = new ThreadSafeClientConnManager(params, schemeRegistry);
def httpClient = new DefaultHttpClient(cm, params);
return httpClient;
}
Below is the output am getting while trying to do the update over restful api
testJson = {"name":"test_name","displayName":"test_display_name","active":"false","value":"test_value"}
Response Code = 400 Error in updating Rule config
error message = {
"cause":{
"cause":null,
"message":"No content to map due to end-of-input\n at [Source: org.apache.catalina.connector.CoyoteInputStream#5438c5f7; line: 1, column: 0]"
},
"message":"Could not read an object of type class com.validation.entity.RuleConfiguration from the request!; nested exception is com.fasterxml.jackson.databind.JsonMappingException: No content to map due to end-of-input\n at [Source: org.apache.catalina.connector.CoyoteInputStream#5438c5f7; line: 1, column: 0]"
}
If I use the same testJson for HttpPut in postman it works fine
Am not sure why am getting No content to map due to end-of-input\n error for HttpPut with the Apache HttpClient 4.0.1, can someone please help?

In the example you have shown you are not calling
putRequest.setEntity(stringEntity)
so the request you send has empty body.

Apache http client sample failing for Digest authentication

I am running the sample Apache hc (http client) for digest authentication. I didn't change anything, just using the provided sample:
public static void main(String[] args) throws Exception {
HttpHost target = new HttpHost("httpbin.org", 80, "http");
CredentialsProvider credsProvider = new BasicCredentialsProvider();
credsProvider.setCredentials(
new AuthScope(target.getHostName(), target.getPort()),
new UsernamePasswordCredentials("user", "passwd"));
CloseableHttpClient httpclient = HttpClients.custom()
.setDefaultCredentialsProvider(credsProvider)
.build();
try {
// Create AuthCache instance
AuthCache authCache = new BasicAuthCache();
// Generate DIGEST scheme object, initialize it and add it to the local
// auth cache
DigestScheme digestAuth = new DigestScheme();
// Suppose we already know the realm name
digestAuth.overrideParamter("realm", "me#kennethreitz.com");
// Suppose we already know the expected nonce value
digestAuth.overrideParamter("nonce", "b2c603bb7c93cfa197945553a1044283");
authCache.put(target, digestAuth);
// Add AuthCache to the execution context
HttpClientContext localContext = HttpClientContext.create();
localContext.setAuthCache(authCache);
HttpGet httpget = new HttpGet("http://httpbin.org/digest-auth/auth/user/passwd");
System.out.println("Executing request " + httpget.getRequestLine() + " to target " + target);
for (int i = 0; i < 3; i++) {
CloseableHttpResponse response = httpclient.execute(target, httpget, localContext);
try {
System.out.println("----------------------------------------");
System.out.println(response.getStatusLine());
System.out.println(EntityUtils.toString(response.getEntity()));
} finally {
response.close();
}
}
} finally {
httpclient.close();
}
}
And I am getting: HTTP/1.1 401 UNAUTHORIZED
If I go direct to http://httpbin.org/digest-auth/auth/user/passwd in prompts me for user/passwd and then provides the page. So the website is working right.
Any idea what is wrong? I have the latest version of the library.
Fiddler Auth for browser (successful):
No Proxy-Authorization Header is present.
Authorization Header is present: Digest username="user",
realm="me#kennethreitz.com", nonce="8ada87344eb5a10bf810bcc211205c24",
uri="/digest-auth/auth/user/passwd",
response="ad22423e5591d14c90c6fe3cd762e64c",
opaque="361645844d957289c4c8f3479f76269f", qop=auth, nc=00000001,
cnonce="260d8ddfe64bf32e"
Fiddler Auth for my code (failed):
No Proxy-Authorization Header is present.
Authorization Header is present: Digest username="user",
realm="me#kennethreitz.com", nonce="76af6c9c0a1f57ee5f0fcade2a5f758c",
uri="http://httpbin.org/digest-auth/auth/user/passwd",
response="745686e3f38ab40ce5907d41f91823e6", qop=auth, nc=00000001,
cnonce="634b618d5c8ac9af", algorithm=MD5,
opaque="fe84ce11c48a7b258490600800e5e6df"

This code digestAuth.overrideParamter("realm", "some realm") should have some change.To replace "some realm" by your server realm.Please look this question

Ok I got it working. You have to set a cookie too. Thanks to this post for the help. The below code works - but only if you are not using Fiddler.
public static void main(String[] args) throws Exception {
CookieStore cookieStore = new BasicCookieStore();
BasicClientCookie cookie = new BasicClientCookie("fake", "fake_value");
cookie.setDomain("httpbin.org");
cookie.setPath("/");
cookieStore.addCookie(cookie);
// https://stackoverflow.com/questions/27291842/digest-auth-with-java-apache-client-always-401-unauthorized
HttpHost target = new HttpHost("httpbin.org", 80, "http");
CredentialsProvider credsProvider = new BasicCredentialsProvider();
credsProvider.setCredentials(
new AuthScope(target.getHostName(), target.getPort()),
new UsernamePasswordCredentials("user", "passwd"));
CloseableHttpClient httpclient = HttpClients.custom()
.setDefaultCookieStore(cookieStore)
.setDefaultCredentialsProvider(credsProvider)
// .setProxy(new HttpHost("127.0.0.1", 8888))
.build();
try {
// Create AuthCache instance
AuthCache authCache = new BasicAuthCache();
// Generate DIGEST scheme object, initialize it and add it to the local
// auth cache
DigestScheme digestAuth = new DigestScheme();
// Suppose we already know the realm name
digestAuth.overrideParamter("realm", "me#kennethreitz.com");
// Suppose we already know the expected nonce value
digestAuth.overrideParamter("nonce", calculateNonce());
authCache.put(target, digestAuth);
// Add AuthCache to the execution context
HttpClientContext localContext = HttpClientContext.create();
localContext.setAuthCache(authCache);
HttpGet httpget = new HttpGet("http://httpbin.org/digest-auth/auth/user/passwd");
System.out.println("Executing request " + httpget.getRequestLine() + " to target " + target);
CloseableHttpResponse response = httpclient.execute(target, httpget, localContext);
try {
System.out.println("----------------------------------------");
System.out.println(response.getStatusLine());
System.out.println(EntityUtils.toString(response.getEntity()));
} finally {
response.close();
}
} finally {
httpclient.close();
}
}
public static synchronized String calculateNonce() {
Date d = new Date();
SimpleDateFormat f = new SimpleDateFormat("yyyy:MM:dd:hh:mm:ss");
String fmtDate = f.format(d);
Random rand = new Random(100000);
Integer randomInt = rand.nextInt();
return org.apache.commons.codec.digest.DigestUtils.md5Hex(fmtDate + randomInt.toString());
}

how can i get jsessionId from client: DefaultHttpClient httpclient = new DefaultHttpClient();

HttpHost targetHost = new HttpHost("myhost",8080, "http");
CredentialsProvider credsProvider = new BasicCredentialsProvider();
credsProvider.setCredentials(new
AuthScope(targetHost.getHostName(), targetHost.getPort()), new
UsernamePasswordCredentials("username", "password"));
// Create AuthCache instance
AuthCache authCache = new BasicAuthCache();
// Generate BASIC scheme object and add it to the local auth cache
BasicScheme basicAuth = new BasicScheme();
authCache.put(targetHost, basicAuth);
// Add AuthCache to the execution context
HttpClientContext context = HttpClientContext.create();
context.setCredentialsProvider(credsProvider);
context.setAuthCache(authCache);
HttpGet httpget = new HttpGet("/");
try {
HttpResponse response = httpclient.execute(targetHost, httpget, context);
System.out.println(httpclient.getCookieStore().getCookies());
} catch (Exception e) {
} finally {
try {
httpget.abort();}catch(Exception e){}
}
}
but output i am getting is : [] nothing else . what mistake i am doing and how i can get jsessionId so that i can store it and use it later when i have to post json data to my server

Have you checked this link
How to manage sessions with Android Application
private void parseSessionID(HttpResponse response) {
try {
Header header = response.getFirstHeader("Set-Cookie");
String value = header.getValue();
if (value.contains("JSESSIONID")) {
int index = value.indexOf("JSESSIONID=");
int endIndex = value.indexOf(";", index);
String sessionID = value.substring(
index + "JSESSIONID=".length(), endIndex);
Logger.d(this, "id " + sessionID);
if (sessionID != null) {
classStaticVariable= sessionID;
}
}
} catch (Exception e) {
}

http client 4.3 not sending credentials

I am trying to send a get request using apache http client 4.3 (to a client using self sign cert), however I get back the error "Requires Authentication" everytime. In a web browser it works just fine so the username / password / url is correct. Is this not the way to pass username/password using http client 4.3?
public static String sendJsonHttpGetRequest(
String host,
String path,
String username,
String password,
int socketTimeout,
int connectionTimeout,
int connectionRequestTimeout
) throws Exception
{
String responseBody = null;
CredentialsProvider credsProvider = new BasicCredentialsProvider();
credsProvider.setCredentials(AuthScope.ANY, new UsernamePasswordCredentials(username, password));
SSLContextBuilder builder = new SSLContextBuilder();
builder.loadTrustMaterial(null, new TrustStrategy(){
#Override
public boolean isTrusted(java.security.cert.X509Certificate[] chain, String authType)
throws java.security.cert.CertificateException
{
return true;
}
});
SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(builder.build());
CloseableHttpClient httpclient = HttpClients.custom().setSSLSocketFactory(sslsf).setDefaultCredentialsProvider(credsProvider).build();
URIBuilder uriB = new URIBuilder().setScheme("https").setHost(host).setPath(path);
HttpGet _http = new HttpGet( uriB.build() );
RequestConfig _requestConfig = RequestConfig.custom().
setSocketTimeout(socketTimeout).
setConnectTimeout(connectionTimeout).
setConnectionRequestTimeout(connectionRequestTimeout).build();
_http.addHeader("Content-Type", "application/json");
_http.addHeader("Accept","application/json, text/xml;q=9, /;q=8");
_http.setConfig(_requestConfig);
// ###########################
ResponseHandler<String> response = new BasicResponseHandler();
responseBody = httpclient.execute(_http, response);
return responseBody;
}

turns out now with http 4+ you have to provide it in two locations for it to work,
second is
authCache.put(host, basicAuth);
CredentialsProvider credentialsProvider = new BasicCredentialsProvider();
credentialsProvider.setCredentials(AuthScope.ANY, new UsernamePasswordCredentials(username, password));
HttpClientContext _context = HttpClientContext.create();
_context.setAuthCache(authCache);
_context.setCredentialsProvider(credentialsProvider);
responseBody = httpclient.execute(_http, response, _context);

I don't use this library myself, but have you tried the HttpClient class?
HttpClient client = new HttpClient();
client.getParams().setAuthenticationPreemptive(true);
client.getState().setCredentials(AuthScope.ANY, new UsernamePasswordCredentials(username, password));
GetMethod method = new GetMethod(uri);
client.executeMethod(method);
You still have to build the uri and set timeouts, but it could be an option.

DefaultHttpClient - Avoiding multiple Attempts to execute request [duplicate]

Is there an easier way to setup the http client for preemptive basic authentication than what described here?
In previous version (3.x) it used to be a simple method call (eg, httpClient.getParams().setAuthenticationPreemptive(true)).
The main thing I want to avoid is adding the BasicHttpContext to each method I execute.

If you are looking to force HttpClient 4 to authenticate with a single request, the following will work:
String username = ...
String password = ...
UsernamePasswordCredentials creds = new UsernamePasswordCredentials(username, password);
HttpRequest request = ...
request.addHeader(new BasicScheme().authenticate(creds, request));

It's difficult to do this without passing a context through every time, but you can probably do it by using a request interceptor. Here is some code that we use (found from their JIRA, iirc):
// Pre-emptive authentication to speed things up
BasicHttpContext localContext = new BasicHttpContext();
BasicScheme basicAuth = new BasicScheme();
localContext.setAttribute("preemptive-auth", basicAuth);
httpClient.addRequestInterceptor(new PreemptiveAuthInterceptor(), 0);
(...)
static class PreemptiveAuthInterceptor implements HttpRequestInterceptor {
public void process(final HttpRequest request, final HttpContext context) throws HttpException, IOException {
AuthState authState = (AuthState) context.getAttribute(ClientContext.TARGET_AUTH_STATE);
// If no auth scheme avaialble yet, try to initialize it
// preemptively
if (authState.getAuthScheme() == null) {
AuthScheme authScheme = (AuthScheme) context.getAttribute("preemptive-auth");
CredentialsProvider credsProvider = (CredentialsProvider) context.getAttribute(ClientContext.CREDS_PROVIDER);
HttpHost targetHost = (HttpHost) context.getAttribute(ExecutionContext.HTTP_TARGET_HOST);
if (authScheme != null) {
Credentials creds = credsProvider.getCredentials(new AuthScope(targetHost.getHostName(), targetHost.getPort()));
if (creds == null) {
throw new HttpException("No credentials for preemptive authentication");
}
authState.setAuthScheme(authScheme);
authState.setCredentials(creds);
}
}
}
}

This is the same solution as Mat's Mannion's, but you don't have to put localContext to each request. It's simpler, but it adds authentication to ALL requests. Useful, if you don't have control over individual requests, as in my case when using Apache Solr, which uses HttpClient internally.
import org.apache.http.HttpException;
import org.apache.http.HttpHost;
import org.apache.http.HttpRequest;
import org.apache.http.HttpRequestInterceptor;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.AuthState;
import org.apache.http.auth.Credentials;
import org.apache.http.client.CredentialsProvider;
import org.apache.http.client.protocol.HttpClientContext;
import org.apache.http.impl.auth.BasicScheme;
import org.apache.http.protocol.HttpContext;
import org.apache.http.protocol.HttpCoreContext;
httpClient.addRequestInterceptor(new PreemptiveAuthInterceptor(), 0);
(...)
static class PreemptiveAuthInterceptor implements HttpRequestInterceptor {
public void process(final HttpRequest request, final HttpContext context) throws HttpException, IOException {
AuthState authState = (AuthState) context.getAttribute(HttpClientContext.TARGET_AUTH_STATE);
// If no auth scheme available yet, try to initialize it
// preemptively
if (authState.getAuthScheme() == null) {
CredentialsProvider credsProvider = (CredentialsProvider) context.getAttribute(HttpClientContext.CREDS_PROVIDER);
HttpHost targetHost = (HttpHost) context.getAttribute(HttpCoreContext.HTTP_TARGET_HOST);
Credentials creds = credsProvider.getCredentials(new AuthScope(targetHost.getHostName(), targetHost.getPort()));
if (creds == null) {
throw new HttpException("No credentials for preemptive authentication");
}
authState.update(new BasicScheme(), creds);
}
}
}
Of course, you have to set the credentials provider:
httpClient.getCredentialsProvider().setCredentials(
new AuthScope(url.getHost(), url.getPort()),
new UsernamePasswordCredentials(username, password))
The AuthScope must not contain realm, as it is not known in advance.

A lot of the answers above use deprecated code. I am using Apache SOLRJ version 5.0.0.
My code consists of
private HttpSolrClient solrClient;
private void initialiseSOLRClient() {
URL solrURL = null;
try {
solrURL = new URL(urlString);
} catch (MalformedURLException e) {
LOG.error("Cannot parse the SOLR URL!!" + urlString);
throw new SystemException("Cannot parse the SOLR URL!! " + urlString, e);
}
String host = solrURL.getHost();
int port = solrURL.getPort();
AuthScope authScope = new AuthScope(host, port);
BasicTextEncryptor textEncryptor = new BasicTextEncryptor();
textEncryptor.setPassword("red bananas in the spring");
String decryptPass = textEncryptor.decrypt(pass);
UsernamePasswordCredentials creds = new UsernamePasswordCredentials(userName, decryptPass);
CredentialsProvider credsProvider = new BasicCredentialsProvider();
credsProvider.setCredentials(
authScope,
creds);
HttpClientBuilder builder = HttpClientBuilder.create();
builder.addInterceptorFirst(new PreemptiveAuthInterceptor());
builder.setDefaultCredentialsProvider(credsProvider);
CloseableHttpClient httpClient = builder.build();
solrClient = new HttpSolrClient(urlString, httpClient);
}
The PreemptiveAuthInterceptor is now as follows:-
static class PreemptiveAuthInterceptor implements HttpRequestInterceptor {
public void process(final HttpRequest request, final HttpContext context) throws HttpException, IOException {
AuthState authState = (AuthState) context.getAttribute(HttpClientContext.TARGET_AUTH_STATE);
// If no auth scheme available yet, try to initialize it
// preemptively
if (authState.getAuthScheme() == null) {
CredentialsProvider credsProvider = (CredentialsProvider)
context.getAttribute(HttpClientContext.CREDS_PROVIDER);
HttpHost targetHost = (HttpHost) context.getAttribute(HttpCoreContext.HTTP_TARGET_HOST);
AuthScope authScope = new AuthScope(targetHost.getHostName(), targetHost.getPort());
Credentials creds = credsProvider.getCredentials(authScope);
if(creds == null){
}
authState.update(new BasicScheme(), creds);
}
}
}

A little late to the party but I came accross the thread trying to solve this for proxy pre-authorization of a post request. To add to Adam's response, I found the following worked for me:
HttpPost httppost = new HttpPost(url);
UsernamePasswordCredentials creds = new UsernamePasswordCredentials(username, password);
Header bs = new BasicScheme().authenticate(creds, httppost);
httppost.addHeader("Proxy-Authorization", bs.getValue());
Thought that might be helpful for anyone else who runs into this.

I think the best way may be to just do it manually. I added the following function
Classic Java:
import javax.xml.bind.DatatypeConverter;
...
private static void addAuthHeader(HttpRequestBase http, String username, String password) throws UnsupportedEncodingException {
String encoded = DatatypeConverter.printBase64Binary((username + ":" + password).getBytes("UTF-8"));
http.addHeader("AUTHORIZATION", "Basic " + encoded);
}
HTTPRequestBase can be an instance of HttpGet or HttpPost
Android:
import android.util.Base64;
...
private static void addAuthHeader(HttpRequestBase http, String username, String password) throws UnsupportedEncodingException {
String encoded = Base64.encodeToString((username + ":" + password).getBytes("UTF-8"), Base64.NO_WRAP);
http.addHeader("AUTHORIZATION", "Basic " + encoded);
}

I'm using this code, based on my reading of the HTTPClient 4.5 docs:
HttpClientContext ctx = HttpClientContext.create()
ctx.setCredentialsProvider(new BasicCredentialsProvider())
ctx.setAuthCache(new BasicAuthCache())
UsernamePasswordCredentials creds = new UsernamePasswordCredentials(user, pass)
AuthScope authScope = new AuthScope(host, port)
ctx.getCredentialsProvider.setCredentials(authScope, credentials)
// This part makes authentication preemptive:
HttpHost targetHost = new HttpHost(host, port, scheme)
ctx.getAuthCache.put(targetHost, new BasicScheme())
...and make sure you always pass that context to HTTPClient.execute().

I don't quite get your closing comment. It's the HttpClient that has all of that machinery for doing preemptive auth, and you only have to do that once (when you construct and configure your HttpClient). Once you've done that, you construct your method instances the same way as always. You don't "add the BasicHttpContext" to the method.
Your best bet, I'd think, is to have your own object that sets up all of the junk required for preemptive auth, and has a simple method or methods for executing requests on given HTTPMethod objects.

in android,Mat Mannion's answer can't resolve https,still send two requests,you can do like below,the trick is append authHeader with user-agent：
public static DefaultHttpClient createProxyHttpClient() {
try {
final DefaultHttpClient client = createPlaintHttpClient();
client.setRoutePlanner(new HttpRoutePlanner() {
#Override
public HttpRoute determineRoute(HttpHost target, HttpRequest request, HttpContext context) throws HttpException {
boolean isSecure = "https".equalsIgnoreCase(target.getSchemeName());
if (needProxy) {
Header header = isSecure ? ProxyUtils.createHttpsAuthHeader() : ProxyUtils.createAuthHeader();
if (isSecure) {
client.getParams().setParameter(CoreProtocolPNames.USER_AGENT, com.netease.cloudmusic.utils.HttpRequest.USER_AGENT + "\r\n" + header.getName() + ":" + header.getValue());
} else {
client.getParams().setParameter(CoreProtocolPNames.USER_AGENT, com.netease.cloudmusic.utils.HttpRequest.USER_AGENT);
if (request instanceof RequestWrapper) {
request = ((RequestWrapper) request).getOriginal();
}
request.setHeader(header);
}
String host = isSecure ? ProxyUtils.SECURE_HOST : ProxyUtils.HOST;
int port = isSecure ? ProxyUtils.SECURE_PORT : ProxyUtils.PORT;
return new HttpRoute(target, null, new HttpHost(host, port), isSecure);
} else {
client.getParams().setParameter(CoreProtocolPNames.USER_AGENT, com.netease.cloudmusic.utils.HttpRequest.USER_AGENT);
return new HttpRoute(target, null, isSecure);
}
}
});
return client;
} catch (Exception e) {
e.printStackTrace();
return new DefaultHttpClient();
}
}
public static DefaultHttpClient createPlaintHttpClient() {
try {
KeyStore trustStore = KeyStore.getInstance(KeyStore.getDefaultType());
trustStore.load(null, null);
PlainSSLSocketFactory socketFactory = new PlainSSLSocketFactory(trustStore);
socketFactory.setHostnameVerifier(SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
BasicHttpParams params = new BasicHttpParams();
HttpConnectionParams.setConnectionTimeout(params, 30000);
HttpConnectionParams.setSoTimeout(params, 30000);
HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);
HttpProtocolParams.setContentCharset(params, HTTP.UTF_8);
SchemeRegistry registry = new SchemeRegistry();
registry.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));
registry.register(new Scheme("https", socketFactory, 443));
ThreadSafeClientConnManager ccm = new ThreadSafeClientConnManager(params, registry);
HttpClientParams.setCookiePolicy(params, CookiePolicy.BROWSER_COMPATIBILITY);
final DefaultHttpClient client = new DefaultHttpClient(ccm, params);
client.setRoutePlanner(new HttpRoutePlanner() {
#Override
public HttpRoute determineRoute(HttpHost target, HttpRequest arg1, HttpContext arg2) throws HttpException {
client.getParams().setParameter(CoreProtocolPNames.USER_AGENT, com.netease.cloudmusic.utils.HttpRequest.USER_AGENT);
return new HttpRoute(target, null, "https".equalsIgnoreCase(target.getSchemeName()));
}
});
return client;
} catch (Exception e) {
e.printStackTrace();
return new DefaultHttpClient();
}
}

SolrConfig:
#Configuration
public class SolrConfig {
#Value("${solr.http.url}")
private String solrUrl;
#Value("${solr.http.username}")
private String solrUser;
#Value("${solr.http.password}")
private String solrPassword;
#Value("${solr.http.pool.maxTotal}")
private int poolMaxTotal;
#Value("${solr.http.pool.maxPerRoute}")
private int pollMaxPerRoute;
#Bean
public SolrClient solrClient() {
PoolingHttpClientConnectionManager connectionManager = new PoolingHttpClientConnectionManager();
connectionManager.setMaxTotal(poolMaxTotal);
connectionManager.setDefaultMaxPerRoute(pollMaxPerRoute);
CredentialsProvider credentialsProvider = new BasicCredentialsProvider();
credentialsProvider.setCredentials(AuthScope.ANY, new UsernamePasswordCredentials(solrUser, solrPassword));
CloseableHttpClient httpClient = HttpClientBuilder.create()
.addInterceptorFirst(new PreemptiveAuthInterceptor())
.setConnectionManager(connectionManager)
.setDefaultCredentialsProvider(credentialsProvider)
.build();
return new HttpSolrClient.Builder(solrUrl).withHttpClient(httpClient).build();
}
}
PreemptiveAuthInterceptor:
public class PreemptiveAuthInterceptor implements HttpRequestInterceptor {
public void process(final HttpRequest request, final HttpContext context)
throws HttpException {
AuthState authState = (AuthState) context
.getAttribute(HttpClientContext.TARGET_AUTH_STATE);
// If no auth scheme available yet, try to initialize it
// preemptively
if (authState.getAuthScheme() == null) {
CredentialsProvider credentialsProvider = (CredentialsProvider) context
.getAttribute(HttpClientContext.CREDS_PROVIDER);
HttpHost targetHost = (HttpHost) context
.getAttribute(HttpCoreContext.HTTP_TARGET_HOST);
Credentials credentials = credentialsProvider.getCredentials(new AuthScope(
targetHost.getHostName(), targetHost.getPort()));
if (credentials == null) {
throw new HttpException(
"No credentials for preemptive authentication");
}
authState.update(new BasicScheme(), credentials);
}
}
}

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