Example usage for org.apache.http.client.protocol HttpClientContext getAuthSchemeRegistry

Introduction

In this page you can find the example usage for org.apache.http.client.protocol HttpClientContext getAuthSchemeRegistry.

Prototype

public Lookup<AuthSchemeProvider> getAuthSchemeRegistry() 

Source Link

Usage

From source file:org.apache.http.impl.client.AuthenticationStrategyImpl.java

public Queue<AuthOption> select(final Map<String, Header> challenges, final HttpHost authhost,
        final HttpResponse response, final HttpContext context) throws MalformedChallengeException {
    Args.notNull(challenges, "Map of auth challenges");
    Args.notNull(authhost, "Host");
    Args.notNull(response, "HTTP response");
    Args.notNull(context, "HTTP context");
    final HttpClientContext clientContext = HttpClientContext.adapt(context);

    final Queue<AuthOption> options = new LinkedList<AuthOption>();
    final Lookup<AuthSchemeProvider> registry = clientContext.getAuthSchemeRegistry();
    if (registry == null) {
        this.log.debug("Auth scheme registry not set in the context");
        return options;
    }//from   w  w  w  .j av  a  2 s .  co m
    final CredentialsProvider credsProvider = clientContext.getCredentialsProvider();
    if (credsProvider == null) {
        this.log.debug("Credentials provider not set in the context");
        return options;
    }
    final RequestConfig config = clientContext.getRequestConfig();
    Collection<String> authPrefs = getPreferredAuthSchemes(config);
    if (authPrefs == null) {
        authPrefs = DEFAULT_SCHEME_PRIORITY;
    }
    if (this.log.isDebugEnabled()) {
        this.log.debug("Authentication schemes in the order of preference: " + authPrefs);
    }

    for (final String id : authPrefs) {
        final Header challenge = challenges.get(id.toLowerCase(Locale.US));
        if (challenge != null) {
            final AuthSchemeProvider authSchemeProvider = registry.lookup(id);
            if (authSchemeProvider == null) {
                if (this.log.isWarnEnabled()) {
                    this.log.warn("Authentication scheme " + id + " not supported");
                    // Try again
                }
                continue;
            }
            final AuthScheme authScheme = authSchemeProvider.create(context);
            authScheme.processChallenge(challenge);

            final AuthScope authScope = new AuthScope(authhost.getHostName(), authhost.getPort(),
                    authScheme.getRealm(), authScheme.getSchemeName());

            final Credentials credentials = credsProvider.getCredentials(authScope);
            if (credentials != null) {
                options.add(new AuthOption(authScheme, credentials));
            }
        } else {
            if (this.log.isDebugEnabled()) {
                this.log.debug("Challenge for " + id + " authentication scheme not available");
                // Try again
            }
        }
    }
    return options;
}

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