com.cognifide.qa.bb.proxy.analyzer.predicate.RequestPredicateImpl.java Source code

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Here is the source code for com.cognifide.qa.bb.proxy.analyzer.predicate.RequestPredicateImpl.java

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/*-
 * #%L
 * Bobcat
 * %%
 * Copyright (C) 2016 Cognifide Ltd.
 * %%
 * 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.
 * #L%
 */
package com.cognifide.qa.bb.proxy.analyzer.predicate;

import java.net.URI;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

import org.apache.commons.lang3.StringUtils;
import org.apache.http.NameValuePair;
import org.apache.http.client.utils.URLEncodedUtils;

import com.google.common.base.Charsets;

import io.netty.handler.codec.http.HttpRequest;

/**
 * A simple predicate that matches requests with given URI and parameters.
 */
public class RequestPredicateImpl implements RequestPredicate {

    private final String urlPrefix;

    private final Map<String, String> expectedParams;

    /**
     * Constructor. Initializes RequestPredicateImpl.
     *
     * @param urlPrefix      url prefix
     * @param expectedParams map of expected parameters
     */
    public RequestPredicateImpl(String urlPrefix, Map<String, String> expectedParams) {
        this.urlPrefix = urlPrefix;
        this.expectedParams = expectedParams;
    }

    @Override
    public boolean accepts(HttpRequest request) {
        boolean result = false;
        URI uri = URI.create(request.getUri());
        String path = uri.getPath();
        if (path != null && path.startsWith(urlPrefix)) {
            String query = uri.getQuery();
            if (expectedParams.isEmpty() && StringUtils.isEmpty(query)) {
                result = true;
            } else if (StringUtils.isNotEmpty(query)) {
                List<NameValuePair> params = URLEncodedUtils.parse(query, Charsets.UTF_8);
                result = hasAllExpectedParams(expectedParams, params);
            }
        }
        return result;
    }

    private boolean hasAllExpectedParams(Map<String, String> expected, List<NameValuePair> actual) {
        for (Entry<String, String> expectedParam : expected.entrySet()) {
            if (!findParam(expectedParam.getKey(), expectedParam.getValue(), actual)) {
                return false;
            }
        }
        return true;
    }

    public boolean startsWithUrlPrefix(String url) {
        return url.startsWith(urlPrefix);
    }

    public int calculateScore(Map<String, String> parameters) {
        int result = 0;
        for (Entry<String, String> entry : parameters.entrySet()) {
            if (expectedParams.containsKey(entry.getKey())
                    && expectedParams.get(entry.getKey()).equals(entry.getValue())) {
                result++;
            }
        }
        return result;
    }

    @Override
    public String toString() {
        return String.format("[prefix: %s, params: %s]", urlPrefix, expectedParams);
    }

    private boolean findParam(String key, String value, List<NameValuePair> params) {
        for (NameValuePair param : params) {
            if (param.getName().equals(key) && param.getValue().equals(value)) {
                return true;
            }
        }
        return false;
    }
}