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// Copyright Verizon Media. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.jdisc.http.filter.util;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;
import com.fasterxml.jackson.databind.node.TextNode;
import com.yahoo.jdisc.Response;
import com.yahoo.jdisc.handler.ContentChannel;
import com.yahoo.jdisc.handler.ResponseHandler;
import com.yahoo.jdisc.http.Cookie;
import com.yahoo.jdisc.http.filter.DiscFilterRequest;
import java.io.UncheckedIOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.nio.ByteBuffer;
import java.util.List;
import java.util.Optional;
/**
* Helper methods for auth0/okta request filters.
*
* @author valerijf
*/
public class FilterUtils {
private static final ObjectMapper mapper = new ObjectMapper();
public static void sendRedirectResponse(ResponseHandler handler, List<Cookie> cookies, String location) {
Response response = createResponse(Response.Status.FOUND, cookies);
response.headers().add("Location", location);
handler.handleResponse(response).close(null);
}
public static void sendMessageResponse(ResponseHandler handler, List<Cookie> cookies, int code, String message) {
Response response = createResponse(code, cookies);
ContentChannel contentChannel = handler.handleResponse(response);
try {
ObjectNode jsonNode = mapper.createObjectNode();
jsonNode.set("message", TextNode.valueOf(message));
byte[] jsonBytes = mapper.writerWithDefaultPrettyPrinter().writeValueAsBytes(jsonNode);
contentChannel.write(ByteBuffer.wrap(jsonBytes), null);
} catch (JsonProcessingException e) {
throw new UncheckedIOException(e);
}
contentChannel.close(null);
}
private static Response createResponse(int code, List<Cookie> cookies) {
Response response = new Response(code);
List<String> setCookieHeaders = Cookie.toSetCookieHeaders(cookies);
response.headers().add("Set-Cookie", setCookieHeaders);
return response;
}
public static URI createUriFromRequest(DiscFilterRequest request, String path) {
Optional<Integer> port = Optional.empty();
try {
port = Optional.ofNullable(request.getHeader("Host"))
.flatMap(host -> Optional.of(host.lastIndexOf(':') + 1)
.filter(i -> i > 0)
.map(index -> Integer.parseInt(host.substring(index))));
} catch (NumberFormatException ignored) { }
try {
return new URI(request.getScheme(), null, request.getServerName(), port.orElse(-1), path, null, null);
} catch (URISyntaxException e) {
throw new RuntimeException(e);
}
}
}
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