net.logstash.logback.composite.accessevent.RequestHeadersJsonProvider Maven / Gradle / Ivy

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Provides logback encoders, layouts, and appenders to log in JSON and other formats supported by Jackson

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/**
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package net.logstash.logback.composite.accessevent;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import net.logstash.logback.composite.AbstractFieldJsonProvider;
import net.logstash.logback.composite.FieldNamesAware;
import net.logstash.logback.composite.JsonWritingUtils;
import net.logstash.logback.fieldnames.LogstashAccessFieldNames;
import ch.qos.logback.access.spi.IAccessEvent;
import ch.qos.logback.core.joran.spi.DefaultClass;

import com.fasterxml.jackson.core.JsonGenerator;

public class RequestHeadersJsonProvider extends AbstractFieldJsonProvider implements FieldNamesAware {
    
    /**
     * When true, names of headers will be written to JSON output in lowercase. 
     */
    private boolean lowerCaseHeaderNames = true;
    
    private HeaderFilter filter;

    @Override
    public void writeTo(JsonGenerator generator, IAccessEvent event) throws IOException {
        Map headers;
        if (filter == null) {
            headers = event.getRequestHeaderMap();
        } else {
            headers = new HashMap<>(event.getRequestHeaderMap().size());
            for (Map.Entry header : event.getRequestHeaderMap().entrySet()) {
                if (filter.includeHeader(header.getKey(), header.getValue())) {
                    headers.put(header.getKey(), header.getValue());
                }
            }
        }
        JsonWritingUtils.writeMapStringFields(generator, getFieldName(), headers, lowerCaseHeaderNames);
    }
    
    @Override
    public void setFieldNames(LogstashAccessFieldNames fieldNames) {
        setFieldName(fieldNames.getRequestHeaders());
    }
    
    public boolean getLowerCaseHeaderNames() {
        return lowerCaseHeaderNames;
    }

    public void setLowerCaseHeaderNames(boolean lowerCaseHeaderNames) {
        this.lowerCaseHeaderNames = lowerCaseHeaderNames;
    }

    public HeaderFilter getFilter() {
        return filter;
    }
    
    @DefaultClass(IncludeExcludeHeaderFilter.class)
    public void setFilter(HeaderFilter filter) {
        this.filter = filter;
    }

}