mariotaku/Base64BinaryFormBodyConverter.java

## Base64BinaryFormBodyConverter.java
/*
 *         Twidere - Twitter client for Android
 *
 * 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.mariotaku.twidere.util.net;

import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.util.Base64;
import android.util.Base64OutputStream;

import org.mariotaku.restfu.Pair;
import org.mariotaku.restfu.http.ContentType;
import org.mariotaku.restfu.http.MultiValueMap;
import org.mariotaku.restfu.http.mime.Body;
import org.mariotaku.restfu.http.mime.BodyConverter;
import org.mariotaku.restfu.http.mime.StringBody;
import org.mariotaku.restfu.http.mime.UrlSerialization;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.charset.Charset;
import java.util.List;

/**
 * Created by mariotaku on 2017/4/19.
 */

public class Base64BinaryFormBodyConverter implements BodyConverter {
    @NonNull
    @Override
    public Body convert(@NonNull MultiValueMap<Body> params, @NonNull String[] args) {
        boolean proximateSize = false, dataUri = false;
        for (String arg : args) {
            switch (arg) {
                case "proximate_size": {
                    proximateSize = true;
                    break;
                }
                case "data_uri": {
                    dataUri = true;
                    break;
                }
            }
        }
        return new Base64BinaryFormBody(params.toList(), proximateSize, dataUri);
    }

    public static class Base64BinaryFormBody implements Body {

        private final List<Pair<String, Body>> params;
        private final boolean proximateSize;
        private final boolean dataUri;
        private final Charset charset;

        public Base64BinaryFormBody(List<Pair<String, Body>> params, boolean proximateSize,
                boolean dataUri) {
            this.params = params;
            this.proximateSize = proximateSize;
            this.dataUri = dataUri;
            this.charset = Charset.forName("UTF-8");
        }

        @Override
        public ContentType contentType() {
            return new ContentType("application/x-www-form-urlencoded", charset);
        }

        @Override
        public String contentEncoding() {
            return null;
        }

        @Override
        public long length() throws IOException {
            final LengthCountOutputStream stream = new LengthCountOutputStream();
            writeTo(stream);
            return stream.length();
        }

        @Override
        public long writeTo(OutputStream os) throws IOException {
            long write = 0;

            for (Pair<String, Body> param : params) {
                final byte[] nameBytes = encode(param.first);
                write += write(os, nameBytes);
                final Body value = param.second;
                if (value == null) {
                    continue;
                }
                write += write(os, "=".getBytes(charset));
                if (value instanceof StringBody) {
                    final byte[] valueBytes = encode(((StringBody) value).value());
                    write += write(os, valueBytes);
                } else {
                    if (dataUri) {
                        write += write(os, encode("data:"));
                        String type = getContentType(value);
                        write += write(os, encode(type != null ? type : "application/octet-stream"));
                        write += write(os, encode(";base64,"));
                    }
                    long encodedLength = predictBase64Size(value.length(), true, false);
                    if (os instanceof LengthCountOutputStream) {
                        ((LengthCountOutputStream) os).add(encodedLength);
                    } else {
                        value.writeTo(new Base64OutputStream(os, Base64.NO_WRAP | Base64.URL_SAFE));
                    }
                    write += encodedLength;
                }
            }
            return write;
        }

        @Override
        public InputStream stream() throws IOException {
            ByteArrayOutputStream os = new ByteArrayOutputStream();
            writeTo(os);
            return new ByteArrayInputStream(os.toByteArray());
        }

        @Override
        public void close() throws IOException {
            for (Pair<String, Body> param : params) {
                param.second.close();
            }
        }

        private byte[] encode(String value) {
            return UrlSerialization.QUERY.serialize(value, charset).getBytes(charset);
        }

        private static long predictBase64Size(long inputSize, boolean padded, boolean crlf) {
            long encodedSize = inputSize / 3 * 4;
            if (padded && inputSize % 3 != 0) {
                encodedSize += 4;
            }
            if (crlf) {
                encodedSize += 2 + (2 * encodedSize / 72);
            }
            return encodedSize;
        }

        private static long write(OutputStream os, byte[] bytes) throws IOException {
            os.write(bytes);
            return bytes.length;
        }

        @Nullable
        private static String getContentType(Body body) {
            ContentType type = body.contentType();
            if (type == null) return null;
            return type.getContentType();
        }
    }


    private static class LengthCountOutputStream extends OutputStream {

        private boolean noLength;
        private long length;

        LengthCountOutputStream() {
            reset();
        }

        @Override
        public void write(@NonNull final byte[] buffer, final int offset, final int count) throws IOException {
            add(count);
        }

        @Override
        public void write(final int oneByte) throws IOException {
            add(1);
        }

        public void add(long added) {
            length += added;
        }

        public void markNoLength() {
            noLength = true;
        }

        public void reset() {
            length = 0;
            noLength = false;
        }

        public long length() {
            if (noLength) return -1;
            return length;
        }
    }
}
	/*
	* Twidere - Twitter client for Android
	*
	* 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.mariotaku.twidere.util.net;

	import android.support.annotation.NonNull;
	import android.support.annotation.Nullable;
	import android.util.Base64;
	import android.util.Base64OutputStream;

	import org.mariotaku.restfu.Pair;
	import org.mariotaku.restfu.http.ContentType;
	import org.mariotaku.restfu.http.MultiValueMap;
	import org.mariotaku.restfu.http.mime.Body;
	import org.mariotaku.restfu.http.mime.BodyConverter;
	import org.mariotaku.restfu.http.mime.StringBody;
	import org.mariotaku.restfu.http.mime.UrlSerialization;

	import java.io.ByteArrayInputStream;
	import java.io.ByteArrayOutputStream;
	import java.io.IOException;
	import java.io.InputStream;
	import java.io.OutputStream;
	import java.nio.charset.Charset;
	import java.util.List;

	/**
	* Created by mariotaku on 2017/4/19.
	*/

	public class Base64BinaryFormBodyConverter implements BodyConverter {
	@NonNull
	@Override
	public Body convert(@NonNull MultiValueMap<Body> params, @NonNull String[] args) {
	boolean proximateSize = false, dataUri = false;
	for (String arg : args) {
	switch (arg) {
	case "proximate_size": {
	proximateSize = true;
	break;
	}
	case "data_uri": {
	dataUri = true;
	break;
	}
	}
	}
	return new Base64BinaryFormBody(params.toList(), proximateSize, dataUri);
	}

	public static class Base64BinaryFormBody implements Body {

	private final List<Pair<String, Body>> params;
	private final boolean proximateSize;
	private final boolean dataUri;
	private final Charset charset;

	public Base64BinaryFormBody(List<Pair<String, Body>> params, boolean proximateSize,
	boolean dataUri) {
	this.params = params;
	this.proximateSize = proximateSize;
	this.dataUri = dataUri;
	this.charset = Charset.forName("UTF-8");
	}

	@Override
	public ContentType contentType() {
	return new ContentType("application/x-www-form-urlencoded", charset);
	}

	@Override
	public String contentEncoding() {
	return null;
	}

	@Override
	public long length() throws IOException {
	final LengthCountOutputStream stream = new LengthCountOutputStream();
	writeTo(stream);
	return stream.length();
	}

	@Override
	public long writeTo(OutputStream os) throws IOException {
	long write = 0;

	for (Pair<String, Body> param : params) {
	final byte[] nameBytes = encode(param.first);
	write += write(os, nameBytes);
	final Body value = param.second;
	if (value == null) {
	continue;
	}
	write += write(os, "=".getBytes(charset));
	if (value instanceof StringBody) {
	final byte[] valueBytes = encode(((StringBody) value).value());
	write += write(os, valueBytes);
	} else {
	if (dataUri) {
	write += write(os, encode("data:"));
	String type = getContentType(value);
	write += write(os, encode(type != null ? type : "application/octet-stream"));
	write += write(os, encode(";base64,"));
	}
	long encodedLength = predictBase64Size(value.length(), true, false);
	if (os instanceof LengthCountOutputStream) {
	((LengthCountOutputStream) os).add(encodedLength);
	} else {
	value.writeTo(new Base64OutputStream(os, Base64.NO_WRAP \| Base64.URL_SAFE));
	}
	write += encodedLength;
	}
	}
	return write;
	}

	@Override
	public InputStream stream() throws IOException {
	ByteArrayOutputStream os = new ByteArrayOutputStream();
	writeTo(os);
	return new ByteArrayInputStream(os.toByteArray());
	}

	@Override
	public void close() throws IOException {
	for (Pair<String, Body> param : params) {
	param.second.close();
	}
	}

	private byte[] encode(String value) {
	return UrlSerialization.QUERY.serialize(value, charset).getBytes(charset);
	}

	private static long predictBase64Size(long inputSize, boolean padded, boolean crlf) {
	long encodedSize = inputSize / 3 * 4;
	if (padded && inputSize % 3 != 0) {
	encodedSize += 4;
	}
	if (crlf) {
	encodedSize += 2 + (2 * encodedSize / 72);
	}
	return encodedSize;
	}

	private static long write(OutputStream os, byte[] bytes) throws IOException {
	os.write(bytes);
	return bytes.length;
	}

	@Nullable
	private static String getContentType(Body body) {
	ContentType type = body.contentType();
	if (type == null) return null;
	return type.getContentType();
	}
	}


	private static class LengthCountOutputStream extends OutputStream {

	private boolean noLength;
	private long length;

	LengthCountOutputStream() {
	reset();
	}

	@Override
	public void write(@NonNull final byte[] buffer, final int offset, final int count) throws IOException {
	add(count);
	}

	@Override
	public void write(final int oneByte) throws IOException {
	add(1);
	}

	public void add(long added) {
	length += added;
	}

	public void markNoLength() {
	noLength = true;
	}

	public void reset() {
	length = 0;
	noLength = false;
	}

	public long length() {
	if (noLength) return -1;
	return length;
	}
	}
	}