SimpleMultipartEntity.java

package com.prey.net.http;

/*
Android Asynchronous Http Client
Copyright (c) 2011 James Smith <james@loopj.com>
http://loopj.com

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.
*/

/*
This code is taken from Rafael Sanches' blog.
http://blog.rafaelsanches.com/2011/01/29/upload-using-multipart-post-using-httpclient-in-android/
*/

 

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Random;



public class SimpleMultipartEntity   {
    private final static char[] MULTIPART_CHARS = "-_1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ".toCharArray();

    private String boundary = null;

    ByteArrayOutputStream out = new ByteArrayOutputStream();
    boolean isSetLast = false;
    boolean isSetFirst = false;

    public SimpleMultipartEntity() {
        final StringBuffer buf = new StringBuffer();
        final Random rand = new Random();
        for (int i = 0; i < 30; i++) {
            buf.append(MULTIPART_CHARS[rand.nextInt(MULTIPART_CHARS.length)]);
        }
        this.boundary = buf.toString();

    }

    public void writeFirstBoundaryIfNeeds(){
        if(!isSetFirst){
            try {
                out.write(("--" + boundary + "\r\n").getBytes());
            } catch (final IOException e) {
                e.printStackTrace();
            }
        }

        isSetFirst = true;
    }

    public void writeLastBoundaryIfNeeds() {
        if(isSetLast){
            return;
        }

        try {
            out.write(("\r\n--" + boundary + "--\r\n").getBytes());
        } catch (final IOException e) {
            e.printStackTrace();
        }

        isSetLast = true;
    }

    public void addPart(final String key, final String value) {
        writeFirstBoundaryIfNeeds();
        try {
        	if(key!=null&&value!=null){
        		out.write(("Content-Disposition: form-data; name=\"" +key+"\"\r\n\r\n").getBytes());
            	out.write(value.getBytes());
            	out.write(("\r\n--" + boundary + "\r\n").getBytes());
        	}
        } catch (final IOException e) {
            e.printStackTrace();
        }
    }

    public void addPart(final String key, final String fileName, final InputStream fin, final boolean isLast){
        addPart(key, fileName, fin, "application/octet-stream", isLast);
    }

    public ByteArrayOutputStream addPart(final String key, final String fileName, final InputStream fin, String type, final boolean isLast){
        writeFirstBoundaryIfNeeds();
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        try {
            type = "Content-Type: "+type+"\r\n";
            out.write(("Content-Disposition: form-data; name=\""+ key+"\"; filename=\"" + fileName + "\"\r\n").getBytes());
            out.write(type.getBytes());
            out.write("Content-Transfer-Encoding: binary\r\n\r\n".getBytes());

            final byte[] tmp = new byte[4096];
            int l = 0;
            while ((l = fin.read(tmp)) != -1) {
                out.write(tmp, 0, l);
                outputStream.write(tmp, 0, l);
            }
            if(!isLast)
                out.write(("\r\n--" + boundary + "\r\n").getBytes());
            out.flush();
            outputStream.flush();
        } catch (final IOException e) {
        } finally {
            if (outputStream != null) {
                try {
                    outputStream.close();
                } catch (IOException e) {
                }

            }
            if (fin != null) {
                try {
                    fin.close();
                } catch (final IOException e) {
                }
            }
        }
        return outputStream;
    }

    public void addPart(final String key, final File value, final boolean isLast) {
        try {
            addPart(key, value.getName(), new FileInputStream(value), isLast);
        } catch (final FileNotFoundException e) {
            e.printStackTrace();
        }
    }

 
    public long getContentLength() {
        writeLastBoundaryIfNeeds();
        return out.toByteArray().length;
    }

 
    public String getContentType() {
        return   "multipart/form-data; boundary=" + boundary;
    }

 
    public boolean isChunked() {
        return false;
    }

 
    public boolean isRepeatable() {
        return false;
    }

 
    public boolean isStreaming() {
        return false;
    }

 
    public void writeTo(final OutputStream outstream) throws IOException {
        outstream.write(out.toByteArray());
    }

  


 
    public void consumeContent() throws IOException,
    UnsupportedOperationException {
        if (isStreaming()) {
            throw new UnsupportedOperationException(
            "Streaming entity does not implement #consumeContent()");
        }
    }

 
    public InputStream getContent() throws IOException,
    UnsupportedOperationException {
        return new ByteArrayInputStream(out.toByteArray());
    }
}