Examples of org.apache.commons.httpclient.auth.AuthScheme

Package org.apache.commons.httpclient.auth

Examples of org.apache.commons.httpclient.auth.AuthScheme

org.apache.commons.httpclient.auth.AuthScheme
This interface represents an abstract challenge-response oriented authentication scheme.

An authentication scheme should be able to support the following functions:
- Parse and process the challenge sent by the targer server in response to request for a protected resource
- Provide its textual designation
- Provide its parameters, if available
- Provide the realm this authentication scheme is applicable to, if available
- Generate authorization string for the given set of credentials, request method and URI as specificed in the HTTP request line in response to the actual authorization challenge
Authentication schemes may ignore method name and URI parameters if they are not relevant for the given authentication mechanism

Authentication schemes may be stateful involving a series of challenge-response exchanges
@author Oleg Kalnichevski @author Adrian Sutton @since 2.0beta1

        if (!cleanAuthHeaders(method, WWW_AUTH_RESP)) {
            // User defined authentication header(s) present
            return;
        }
        AuthState authstate = method.getHostAuthState();
        AuthScheme authscheme = authstate.getAuthScheme();
        if (authscheme == null) {
            return;
        }
        if (authstate.isAuthRequested() || !authscheme.isConnectionBased()) {
            String host = method.getParams().getVirtualHost();
            if (host == null) {
                host = conn.getHost();
            }
            int port = conn.getPort();
            AuthScope authscope = new AuthScope(
                host, port, 
                authscheme.getRealm(), 
                authscheme.getSchemeName());  
            if (LOG.isDebugEnabled()) {
                LOG.debug("Authenticating with " + authscope);
            }
            Credentials credentials = this.state.getCredentials(authscope);
            if (credentials != null) {
                String authstring = authscheme.authenticate(credentials, method);
                if (authstring != null) {
                    method.addRequestHeader(new Header(WWW_AUTH_RESP, authstring, true));
                }
            } else {
                if (LOG.isWarnEnabled()) {

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        if (!cleanAuthHeaders(method, PROXY_AUTH_RESP)) {
            // User defined authentication header(s) present
            return;
        }
        AuthState authstate = method.getProxyAuthState();
        AuthScheme authscheme = authstate.getAuthScheme();
        if (authscheme == null) {
            return;
        }
        if (authstate.isAuthRequested() || !authscheme.isConnectionBased()) {
            AuthScope authscope = new AuthScope(
                conn.getProxyHost(), conn.getProxyPort(), 
                authscheme.getRealm(), 
                authscheme.getSchemeName());  
            if (LOG.isDebugEnabled()) {
                LOG.debug("Authenticating with " + authscope);
            }
            Credentials credentials = this.state.getProxyCredentials(authscope);
            if (credentials != null) {
                String authstring = authscheme.authenticate(credentials, method);
                if (authstring != null) {
                    method.addRequestHeader(new Header(PROXY_AUTH_RESP, authstring, true));
                }
            } else {
                if (LOG.isWarnEnabled()) {

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            method.getResponseHeaders(WWW_AUTH_CHALLENGE));
        if (challenges.isEmpty()) {
            LOG.debug("Authentication challenge(s) not found");
            return false; 
        }
        AuthScheme authscheme = null;
        try {
            authscheme = this.authProcessor.processChallenge(authstate, challenges);
        } catch (AuthChallengeException e) {
            if (LOG.isWarnEnabled()) {
                LOG.warn(e.getMessage());
            }
        }
        if (authscheme == null) {
            return false;
        }
        String host = method.getParams().getVirtualHost();
        if (host == null) {
            host = conn.getHost();
        }
        int port = conn.getPort();
        AuthScope authscope = new AuthScope(
            host, port, 
            authscheme.getRealm(), 
            authscheme.getSchemeName());
        
        if (LOG.isDebugEnabled()) {
            LOG.debug("Authentication scope: " + authscope);
        }
        if (authstate.isAuthAttempted() && authscheme.isComplete()) {
            // Already tried and failed
            Credentials credentials = promptForCredentials(
                authscheme, method.getParams(), authscope);
            if (credentials == null) {
                if (LOG.isInfoEnabled()) {

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            method.getResponseHeaders(PROXY_AUTH_CHALLENGE));
        if (proxyChallenges.isEmpty()) {
            LOG.debug("Proxy authentication challenge(s) not found");
            return false; 
        }
        AuthScheme authscheme = null;
        try {
            authscheme = this.authProcessor.processChallenge(authstate, proxyChallenges);
        } catch (AuthChallengeException e) {
            if (LOG.isWarnEnabled()) {
                LOG.warn(e.getMessage());
            }
        }
        if (authscheme == null) {
            return false;
        }
        AuthScope authscope = new AuthScope(
            conn.getProxyHost(), conn.getProxyPort(), 
            authscheme.getRealm(), 
            authscheme.getSchemeName());  


        if (LOG.isDebugEnabled()) {
            LOG.debug("Proxy authentication scope: " + authscope);
        }
        if (authstate.isAuthAttempted() && authscheme.isComplete()) {
            // Already tried and failed
            Credentials credentials = promptForProxyCredentials(
                authscheme, method.getParams(), authscope);
            if (credentials == null) {
                if (LOG.isInfoEnabled()) {

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        if (getRequestHeader(HttpAuthenticator.WWW_AUTH_RESP) == null) {
            Header[] challenges = getResponseHeaderGroup().getHeaders(
                                               HttpAuthenticator.WWW_AUTH);
            if (challenges.length > 0) {
                try {
                    AuthScheme authscheme = HttpAuthenticator.selectAuthScheme(challenges);
                    HttpAuthenticator.authenticate(authscheme, this, conn, state);
                } catch (HttpException e) {
                    // log and move on
                    if (LOG.isErrorEnabled()) {
                        LOG.error(e.getMessage(), e);

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        if (getRequestHeader(HttpAuthenticator.PROXY_AUTH_RESP) == null) {
            Header[] challenges = getResponseHeaderGroup().getHeaders(
                                               HttpAuthenticator.PROXY_AUTH);
            if (challenges.length > 0) {
                try {
                    AuthScheme authscheme = HttpAuthenticator.selectAuthScheme(challenges);
                    HttpAuthenticator.authenticateProxy(authscheme, this, conn, state);
                } catch (HttpException e) {
                    // log and move on
                    if (LOG.isErrorEnabled()) {
                        LOG.error(e.getMessage(), e);

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                break;
        }
        boolean authenticated = false;
        // if there was a header requesting authentication
        if (challenges.length > 0) {
            AuthScheme authscheme = null;
            try {
                authscheme = HttpAuthenticator.selectAuthScheme(challenges);
            } catch (MalformedChallengeException e) {
                if (LOG.isErrorEnabled()) {
                    LOG.error(e.getMessage(), e);
                }
                return true;
            } catch (UnsupportedOperationException e) {
                if (LOG.isErrorEnabled()) {
                    LOG.error(e.getMessage(), e);
                }
                return true;
            }
        
            StringBuffer buffer = new StringBuffer();
            buffer.append(conn.getHost());
            int port = conn.getPort();
            if (conn.getProtocol().getDefaultPort() != port) {
                buffer.append(':');
                buffer.append(port);
            }
            buffer.append('#');
            buffer.append(authscheme.getID());
            String realm = buffer.toString();


            if (realmsUsed.contains(realm)) {
                if (LOG.isInfoEnabled()) {
                    LOG.info("Already tried to authenticate to \""
                             + realm + "\" but still receiving "
                             + statusCode + ".");
                }
                return true;
            } else {
                realmsUsed.add(realm);
            }


            try {
                //remove preemptive header and reauthenticate
                switch (statusCode) {
                    case HttpStatus.SC_UNAUTHORIZED:
                        removeRequestHeader(HttpAuthenticator.WWW_AUTH_RESP);
                        authenticated = HttpAuthenticator.authenticate(
                            authscheme, this, conn, state);
                        this.realm = authscheme.getRealm();
                        break;
                    case HttpStatus.SC_PROXY_AUTHENTICATION_REQUIRED:
                        removeRequestHeader(HttpAuthenticator.PROXY_AUTH_RESP);
                        authenticated = HttpAuthenticator.authenticateProxy(
                            authscheme, this, conn, state);
                        this.proxyRealm = authscheme.getRealm();
                        break;
                }
            } catch (AuthenticationException e) {
                LOG.warn(e.getMessage());
                return true; // finished request

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        if (!cleanAuthHeaders(method, WWW_AUTH_RESP)) {
            // User defined authentication header(s) present
            return;
        }
        AuthState authstate = method.getHostAuthState();
        AuthScheme authscheme = authstate.getAuthScheme();
        if (authscheme == null) {
            return;
        }
        if (authstate.isAuthRequested() || !authscheme.isConnectionBased()) {
            String host = method.getParams().getVirtualHost();
            if (host == null) {
                host = conn.getHost();
            }
            int port = conn.getPort();
            AuthScope authscope = new AuthScope(
                host, port, 
                authscheme.getRealm(), 
                authscheme.getSchemeName());  
            if (LOG.isDebugEnabled()) {
                LOG.debug("Authenticating with " + authscope);
            }
            Credentials credentials = this.state.getCredentials(authscope);
            if (credentials != null) {
                String authstring = authscheme.authenticate(credentials, method);
                if (authstring != null) {
                    method.addRequestHeader(new Header(WWW_AUTH_RESP, authstring, true));
                }
            } else {
                if (LOG.isWarnEnabled()) {

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        if (!cleanAuthHeaders(method, PROXY_AUTH_RESP)) {
            // User defined authentication header(s) present
            return;
        }
        AuthState authstate = method.getProxyAuthState();
        AuthScheme authscheme = authstate.getAuthScheme();
        if (authscheme == null) {
            return;
        }
        if (authstate.isAuthRequested() || !authscheme.isConnectionBased()) {
            AuthScope authscope = new AuthScope(
                conn.getProxyHost(), conn.getProxyPort(), 
                authscheme.getRealm(), 
                authscheme.getSchemeName());  
            if (LOG.isDebugEnabled()) {
                LOG.debug("Authenticating with " + authscope);
            }
            Credentials credentials = this.state.getProxyCredentials(authscope);
            if (credentials != null) {
                String authstring = authscheme.authenticate(credentials, method);
                if (authstring != null) {
                    method.addRequestHeader(new Header(PROXY_AUTH_RESP, authstring, true));
                }
            } else {
                if (LOG.isWarnEnabled()) {

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            method.getResponseHeaders(WWW_AUTH_CHALLENGE));
        if (challenges.isEmpty()) {
            LOG.debug("Authentication challenge(s) not found");
            return false; 
        }
        AuthScheme authscheme = null;
        try {
            authscheme = this.authProcessor.processChallenge(authstate, challenges);
        } catch (AuthChallengeException e) {
            if (LOG.isWarnEnabled()) {
                LOG.warn(e.getMessage());
            }
        }
        if (authscheme == null) {
            return false;
        }
        String host = method.getParams().getVirtualHost();
        if (host == null) {
            host = conn.getHost();
        }
        int port = conn.getPort();
        AuthScope authscope = new AuthScope(
            host, port, 
            authscheme.getRealm(), 
            authscheme.getSchemeName());
        
        if (LOG.isDebugEnabled()) {
            LOG.debug("Authentication scope: " + authscope);
        }
        if (authstate.isAuthAttempted() && authscheme.isComplete()) {
            // Already tried and failed
            Credentials credentials = promptForCredentials(
                authscheme, method.getParams(), authscope);
            if (credentials == null) {
                if (LOG.isInfoEnabled()) {

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