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commons-fileupload-1.3.3-sources.jar - Apache Commons FileUpload
commons-fileupload-1.3.3-sources.jar is the source JAR file for Apache Commons FileUpload 1.3., which
adds robust, high-performance, file upload capability to your servlets and web applications.
JAR File Size and Download Location:
JAR name: commons-fileupload-1.3.3-sources.jar Target JDK version: 1.5 Dependency: commons-io.jar File size: 280,834 bytes Release date: 09-Jun-2017 Download: Apache Commons FileUpload
✍: FYIcenter.com
⏎ org/apache/commons/fileupload/util/mime/Base64Decoder.java
/* * 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.commons.fileupload.util.mime; import java.io.IOException; import java.io.OutputStream; /** * @since 1.3 */ final class Base64Decoder { /** * Decoding table value for invalid bytes. */ private static final int INVALID_BYTE = -1; // must be outside range 0-63 /** * Decoding table value for padding bytes, so can detect PAD afer conversion. */ private static final int PAD_BYTE = -2; // must be outside range 0-63 /** * Mask to treat byte as unsigned integer. */ private static final int MASK_BYTE_UNSIGNED = 0xFF; /** * Number of bytes per encoded chunk - 4 6bit bytes produce 3 8bit bytes on output. */ private static final int INPUT_BYTES_PER_CHUNK = 4; /** * Set up the encoding table. */ private static final byte[] ENCODING_TABLE = { (byte) 'A', (byte) 'B', (byte) 'C', (byte) 'D', (byte) 'E', (byte) 'F', (byte) 'G', (byte) 'H', (byte) 'I', (byte) 'J', (byte) 'K', (byte) 'L', (byte) 'M', (byte) 'N', (byte) 'O', (byte) 'P', (byte) 'Q', (byte) 'R', (byte) 'S', (byte) 'T', (byte) 'U', (byte) 'V', (byte) 'W', (byte) 'X', (byte) 'Y', (byte) 'Z', (byte) 'a', (byte) 'b', (byte) 'c', (byte) 'd', (byte) 'e', (byte) 'f', (byte) 'g', (byte) 'h', (byte) 'i', (byte) 'j', (byte) 'k', (byte) 'l', (byte) 'm', (byte) 'n', (byte) 'o', (byte) 'p', (byte) 'q', (byte) 'r', (byte) 's', (byte) 't', (byte) 'u', (byte) 'v', (byte) 'w', (byte) 'x', (byte) 'y', (byte) 'z', (byte) '0', (byte) '1', (byte) '2', (byte) '3', (byte) '4', (byte) '5', (byte) '6', (byte) '7', (byte) '8', (byte) '9', (byte) '+', (byte) '/' }; /** * The padding byte. */ private static final byte PADDING = (byte) '='; /** * Set up the decoding table; this is indexed by a byte converted to an unsigned int, * so must be at least as large as the number of different byte values, * positive and negative and zero. */ private static final byte[] DECODING_TABLE = new byte[Byte.MAX_VALUE - Byte.MIN_VALUE + 1]; static { // Initialise as all invalid characters for (int i = 0; i < DECODING_TABLE.length; i++) { DECODING_TABLE[i] = INVALID_BYTE; } // set up valid characters for (int i = 0; i < ENCODING_TABLE.length; i++) { DECODING_TABLE[ENCODING_TABLE[i]] = (byte) i; } // Allow pad byte to be easily detected after conversion DECODING_TABLE[PADDING] = PAD_BYTE; } /** * Hidden constructor, this class must not be instantiated. */ private Base64Decoder() { // do nothing } /** * Decode the base 64 encoded byte data writing it to the given output stream, * whitespace characters will be ignored. * * @param data the buffer containing the Base64-encoded data * @param out the output stream to hold the decoded bytes * * @return the number of bytes produced. * @throws IOException thrown when the padding is incorrect or the input is truncated. */ public static int decode(byte[] data, OutputStream out) throws IOException { int outLen = 0; byte [] cache = new byte[INPUT_BYTES_PER_CHUNK]; int cachedBytes = 0; for (byte b : data) { final byte d = DECODING_TABLE[MASK_BYTE_UNSIGNED & b]; if (d == INVALID_BYTE) { continue; // Ignore invalid bytes } cache[cachedBytes++] = d; if (cachedBytes == INPUT_BYTES_PER_CHUNK) { // CHECKSTYLE IGNORE MagicNumber FOR NEXT 4 LINES final byte b1 = cache[0]; final byte b2 = cache[1]; final byte b3 = cache[2]; final byte b4 = cache[3]; if (b1 == PAD_BYTE || b2 == PAD_BYTE) { throw new IOException("Invalid Base64 input: incorrect padding, first two bytes cannot be padding"); } // Convert 4 6-bit bytes to 3 8-bit bytes // CHECKSTYLE IGNORE MagicNumber FOR NEXT 1 LINE out.write((b1 << 2) | (b2 >> 4)); // 6 bits of b1 plus 2 bits of b2 outLen++; if (b3 != PAD_BYTE) { // CHECKSTYLE IGNORE MagicNumber FOR NEXT 1 LINE out.write((b2 << 4) | (b3 >> 2)); // 4 bits of b2 plus 4 bits of b3 outLen++; if (b4 != PAD_BYTE) { // CHECKSTYLE IGNORE MagicNumber FOR NEXT 1 LINE out.write((b3 << 6) | b4); // 2 bits of b3 plus 6 bits of b4 outLen++; } } else if (b4 != PAD_BYTE) { // if byte 3 is pad, byte 4 must be pad too throw new // line wrap to avoid 120 char limit IOException("Invalid Base64 input: incorrect padding, 4th byte must be padding if 3rd byte is"); } cachedBytes = 0; } } // Check for anything left over if (cachedBytes != 0) { throw new IOException("Invalid Base64 input: truncated"); } return outLen; } }
⏎ org/apache/commons/fileupload/util/mime/Base64Decoder.java
Or download all of them as a single archive file:
File name: commons-fileupload-1.3.3-sources.zip File size: 90434 bytes Release date: 2017-06-09 Download
⇒ Download and Install commons-fileupload-1.3.2-bin.zip
⇐ What Is commons-fileupload-1.3.3.jar
2022-11-10, 28681👍, 0💬
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