HttpUtil.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.xmlrpc.util;

import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.util.Enumeration;
import java.util.StringTokenizer;

import org.apache.ws.commons.util.Base64;
import org.apache.xmlrpc.common.XmlRpcHttpRequestConfigImpl;
import org.apache.xmlrpc.common.XmlRpcStreamConfig;


public class HttpUtil {
        public static String encodeBasicAuthentication(String pUser, String pPassword, String pEncoding) throws UnsupportedEncodingException {
        if (pUser == null) {
                        return null;
        }
        final String s = pUser + ':' + pPassword;
                if (pEncoding == null) {
                        pEncoding = XmlRpcStreamConfig.UTF8_ENCODING;
                }
        final byte[] bytes = s.getBytes(pEncoding);
                return Base64.encode(s.getBytes(pEncoding), 0, bytes.length, 0, null);
    }

        public static boolean isUsingGzipEncoding(String pHeaderValue) {
                if (pHeaderValue == null) {
                        return false;
        }
        for (StringTokenizer st = new StringTokenizer(pHeaderValue, ",");  st.hasMoreTokens();  ) {
            String encoding = st.nextToken();
            int offset = encoding.indexOf(';');
            if (offset >= 0) {
                encoding = encoding.substring(0, offset);
            }
            if ("gzip".equalsIgnoreCase(encoding.trim())) {
                return true;
            }
        }
        return false;
    }

    public static String getNonIdentityTransferEncoding(String pHeaderValue) {
        if (pHeaderValue == null) {
            return null;
        }
        for (StringTokenizer st = new StringTokenizer(pHeaderValue, ",");  st.hasMoreTokens();  ) {
            String encoding = st.nextToken();
            int offset = encoding.indexOf(';');
            if (offset >= 0) {
                encoding = encoding.substring(0, offset);
            }
            if (!"identity".equalsIgnoreCase(encoding.trim())) {
                return encoding.trim();
            }
        }
        return null;
    }

        public static boolean isUsingGzipEncoding(Enumeration pValues) {
                if (pValues != null) {
                        while (pValues.hasMoreElements()) {
                                if (isUsingGzipEncoding((String) pValues.nextElement())) {
                                        return true;
                                }
                        }
                }
                return false;
    }

        public static String readLine(InputStream pIn, byte[] pBuffer) throws IOException {
        int next;
        int count = 0;
        while (true) {
            next = pIn.read();
            if (next < 0 || next == '\n') {
                break;
            }
            if (next != '\r') {
                pBuffer[count++] = (byte) next;
            }
            if (count >= pBuffer.length) {
                throw new IOException ("HTTP Header too long");
            }
        }
        return new String(pBuffer, 0, count, "US-ASCII");
    }

        public static void parseAuthorization(XmlRpcHttpRequestConfigImpl pConfig, String pLine) {
                if (pLine == null) {
                        return;
                }
                pLine = pLine.trim();
                StringTokenizer st = new StringTokenizer(pLine);
                if (!st.hasMoreTokens()) {
                        return;
                }
                String type = st.nextToken();
                if (!"basic".equalsIgnoreCase(type)) {
                        return;
                }
                if (!st.hasMoreTokens()) {
                        return;
                }
                String auth = st.nextToken();
            try {
                byte[] c = Base64.decode(auth.toCharArray(), 0, auth.length());
                String enc = pConfig.getBasicEncoding();
            if (enc == null) {
                enc = XmlRpcStreamConfig.UTF8_ENCODING;
            }
            String str = new String(c, enc);
                int col = str.indexOf(':');
                        if (col >= 0) {
                                pConfig.setBasicUserName(str.substring(0, col));
                                pConfig.setBasicPassword(str.substring(col+1));
                        }
            } catch (Throwable ignore) {
            }
        }
}