com.proofpoint.http.server.GZipRequestWrapper.java Source code

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Here is the source code for com.proofpoint.http.server.GZipRequestWrapper.java

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/*
 * Copyright 2010 Proofpoint, Inc.
 *
 * 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 com.proofpoint.http.server;

import javax.servlet.ServletInputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.zip.GZIPInputStream;

import static org.apache.commons.lang.StringUtils.equalsIgnoreCase;

// TODO: handle request.getContentLength and getHeader("content-encoding")
class GZipRequestWrapper extends HttpServletRequestWrapper {
    private final HttpServletRequest request;

    public GZipRequestWrapper(HttpServletRequest request) {
        super(request);
        this.request = request;
    }

    @Override
    public ServletInputStream getInputStream() throws IOException {
        return new ServletInputStreamFromInputStream(new GZIPInputStream(request.getInputStream()));
    }

    @Override
    public int getContentLength() {
        return -1;
    }

    @Override
    public String getHeader(String name) {
        if (equalsIgnoreCase(name, "content-length")) {
            return null;
        }

        // TODO: filter out content-coding

        return request.getHeader(name);
    }

    @Override
    public int getIntHeader(String name) {
        // TODO: filter out content-length
        return request.getIntHeader(name);
    }

    @Override
    public Enumeration<String> getHeaderNames() {
        // TODO: filter out content-length & content-coding
        return request.getHeaderNames();
    }

    @Override
    public Enumeration<String> getHeaders(String name) {
        // TODO: filter out content-length & content-coding
        return request.getHeaders(name);
    }

    private static class ServletInputStreamFromInputStream extends ServletInputStream {
        private final InputStream stream;

        public ServletInputStreamFromInputStream(InputStream stream) throws IOException {
            this.stream = stream;
        }

        public int read() throws IOException {
            return stream.read();
        }

        public int read(byte[] b) throws IOException {
            return stream.read(b);
        }

        public int read(byte[] b, int off, int len) throws IOException {
            return stream.read(b, off, len);
        }

        public long skip(long n) throws IOException {
            return stream.skip(n);
        }

        public int available() throws IOException {
            return stream.available();
        }

        public void close() throws IOException {
            stream.close();
        }

        public void mark(int readLimit) {
            stream.mark(readLimit);
        }

        public void reset() throws IOException {
            stream.reset();
        }

        public boolean markSupported() {
            return stream.markSupported();
        }
    }
}