org.springframework.cloud.dataflow.rest.util.ResourceBasedAuthorizationInterceptor.java Source code

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Here is the source code for org.springframework.cloud.dataflow.rest.util.ResourceBasedAuthorizationInterceptor.java

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/*
 * Copyright 2017 the original author or authors.
 *
 * 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
 *
 *      https://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 org.springframework.cloud.dataflow.rest.util;

import java.io.IOException;
import java.nio.charset.StandardCharsets;

import org.apache.http.HttpException;
import org.apache.http.HttpHeaders;
import org.apache.http.HttpRequest;
import org.apache.http.HttpRequestInterceptor;
import org.apache.http.protocol.HttpContext;

import org.springframework.core.io.Resource;
import org.springframework.util.StreamUtils;

/**
 * {@link HttpRequestInterceptor} that adds an {@code Authorization} header
 * with a value obtained from a {@link Resource}.
 *
 * @author Mike Heath
 */
public class ResourceBasedAuthorizationInterceptor implements HttpRequestInterceptor {

    private final CheckableResource resource;

    public ResourceBasedAuthorizationInterceptor(CheckableResource resource) {
        this.resource = resource;
    }

    @Override
    public void process(HttpRequest httpRequest, HttpContext httpContext) throws HttpException, IOException {
        final String credentials = StreamUtils.copyToString(resource.getInputStream(), StandardCharsets.UTF_8)
                .trim();
        resource.check();
        httpRequest.addHeader(HttpHeaders.AUTHORIZATION, credentials);
    }
}