org.apache.james.jmap.QueryParameterAccessTokenAuthenticationStrategy Maven / Gradle / Ivy

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package org.apache.james.jmap;

import java.util.Optional;

import javax.inject.Inject;
import javax.servlet.http.HttpServletRequest;

import org.apache.james.jmap.api.SimpleTokenManager;
import org.apache.james.jmap.exceptions.MailboxSessionCreationException;
import org.apache.james.jmap.exceptions.NoValidAuthHeaderException;
import org.apache.james.jmap.exceptions.UnauthorizedException;
import org.apache.james.jmap.model.AttachmentAccessToken;
import org.apache.james.jmap.utils.DownloadPath;
import org.apache.james.mailbox.MailboxManager;
import org.apache.james.mailbox.MailboxSession;
import org.apache.james.mailbox.exception.MailboxException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.common.annotations.VisibleForTesting;

public class QueryParameterAccessTokenAuthenticationStrategy implements AuthenticationStrategy {

    private static final Logger LOG = LoggerFactory.getLogger(QueryParameterAccessTokenAuthenticationStrategy.class);
    private static final String AUTHENTICATION_PARAMETER = "access_token";

    private final SimpleTokenManager tokenManager;
    private final MailboxManager mailboxManager;

    @Inject
    @VisibleForTesting
    QueryParameterAccessTokenAuthenticationStrategy(SimpleTokenManager tokenManager, MailboxManager mailboxManager) {
        this.tokenManager = tokenManager;
        this.mailboxManager = mailboxManager;
    }

    @Override
    public MailboxSession createMailboxSession(HttpServletRequest httpRequest) throws MailboxSessionCreationException, NoValidAuthHeaderException {

        return getAccessToken(httpRequest)
            .filter(tokenManager::isValid)
            .map(AttachmentAccessToken::getUsername)
            .map(this::createSystemSession)
            .orElseThrow(() -> new UnauthorizedException());
    }

    private MailboxSession createSystemSession(String username) {
        try {
            return mailboxManager.createSystemSession(username, LOG);
        } catch (MailboxException e) {
            throw new MailboxSessionCreationException(e);
        }
    }

    private Optional getAccessToken(HttpServletRequest httpRequest) {
        try {
            return Optional.of(AttachmentAccessToken.from(httpRequest.getParameter(AUTHENTICATION_PARAMETER), getBlobId(httpRequest)));
        } catch (IllegalArgumentException e) {
            return Optional.empty();
        }
    }

    private String getBlobId(HttpServletRequest httpRequest) {
        String pathInfo = httpRequest.getPathInfo();
        return DownloadPath.from(pathInfo).getBlobId();
    }
}