工作POST multipart请求与截击和不HttpEntity

问题描述

这是不是一个真正的问题，不过，我想，当你需要在这里分享我的一些工作code，供大家参考。

This is not really a question, however, I would like to share some of my working code here for your reference when you need.

我们知道， HttpEntity 为API22 pcated和comletely德$ P $因为API23删除。目前，我们无法访问Android上 HttpEntity参考开发者了（404）。因此，下面是我的工作示例$ C $下的 POST multipart请求与排球和不HttpEntity 。它的工作，与测试Asp.Net的Web API 。当然，code也许仅仅是一个基本的样本职位2存在绘制文件，也不是所有情况下的最佳解决方案，并没有很好的调整。

As we know that HttpEntity is deprecated from API22 and comletely removed since API23. At the moment, we cannot access HttpEntity Reference on Android Developer anymore (404). So, the following is my working sample code for POST Multipart Request with Volley and without HttpEntity. It's working, tested with Asp.Net Web API. Of course, the code perhaps is just a basic sample that posts two existed drawable files, also is not the best solution for all cases, and not good tuning.

更好/更漂亮code任何建议将AP preciated。

Any suggestions for better / more beautiful code will be appreciated.

希望这有助于！

MultipartActivity.java：

package com.example.multipartvolley;

import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.support.v4.content.ContextCompat;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;

import com.android.volley.NetworkResponse;
import com.android.volley.Response;
import com.android.volley.VolleyError;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.IOException;


public class MultipartActivity extends Activity {

    private final Context context = this;
    private final String twoHyphens = "--";
    private final String lineEnd = "\r\n";
    private final String boundary = "apiclient-" + System.currentTimeMillis();
    private final String mimeType = "multipart/form-data;boundary=" + boundary;
    private byte[] multipartBody;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_multipart);

        byte[] fileData1 = getFileDataFromDrawable(context, R.drawable.ic_action_android);
        byte[] fileData2 = getFileDataFromDrawable(context, R.drawable.ic_action_book);

        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        DataOutputStream dos = new DataOutputStream(bos);
        try {
            // the first file
            buildPart(dos, fileData1, "ic_action_android.png");
            // the second file
            buildPart(dos, fileData2, "ic_action_book.png");
            // send multipart form data necesssary after file data
            dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);
            // pass to multipart body
            multipartBody = bos.toByteArray();
        } catch (IOException e) {
            e.printStackTrace();
        }

        String url = "http://192.168.1.100/api/postfile";
        MultipartRequest multipartRequest = new MultipartRequest(url, null, mimeType, multipartBody, new Response.Listener<NetworkResponse>() {
            @Override
            public void onResponse(NetworkResponse response) {
                Toast.makeText(context, "Upload successfully!", Toast.LENGTH_SHORT).show();
            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                Toast.makeText(context, "Upload failed!\r\n" + error.toString(), Toast.LENGTH_SHORT).show();
            }
        });

        VolleySingleton.getInstance(context).addToRequestQueue(multipartRequest);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_multipart, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    private void buildPart(DataOutputStream dataOutputStream, byte[] fileData, String fileName) throws IOException {
        dataOutputStream.writeBytes(twoHyphens + boundary + lineEnd);
        dataOutputStream.writeBytes("Content-Disposition: form-data; name=\"uploaded_file\"; filename=\""
                + fileName + "\"" + lineEnd);
        dataOutputStream.writeBytes(lineEnd);

        ByteArrayInputStream fileInputStream = new ByteArrayInputStream(fileData);
        int bytesAvailable = fileInputStream.available();

        int maxBufferSize = 1024 * 1024;
        int bufferSize = Math.min(bytesAvailable, maxBufferSize);
        byte[] buffer = new byte[bufferSize];

        // read file and write it into form...
        int bytesRead = fileInputStream.read(buffer, 0, bufferSize);

        while (bytesRead > 0) {
            dataOutputStream.write(buffer, 0, bufferSize);
            bytesAvailable = fileInputStream.available();
            bufferSize = Math.min(bytesAvailable, maxBufferSize);
            bytesRead = fileInputStream.read(buffer, 0, bufferSize);
        }

        dataOutputStream.writeBytes(lineEnd);
    }

    private byte[] getFileDataFromDrawable(Context context, int id) {
        Drawable drawable = ContextCompat.getDrawable(context, id);
        Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap();
        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.PNG, 0, byteArrayOutputStream);
        return byteArrayOutputStream.toByteArray();
    }
}

MultipartRequest.java：

package com.example.multipartvolley;

import com.android.volley.AuthFailureError;
import com.android.volley.NetworkResponse;
import com.android.volley.ParseError;
import com.android.volley.Request;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.HttpHeaderParser;

import java.util.Map;

class MultipartRequest extends Request<NetworkResponse> {
    private final Response.Listener<NetworkResponse> mListener;
    private final Response.ErrorListener mErrorListener;
    private final Map<String, String> mHeaders;
    private final String mMimeType;
    private final byte[] mMultipartBody;

    public MultipartRequest(String url, Map<String, String> headers, String mimeType, byte[] multipartBody, Response.Listener<NetworkResponse> listener, Response.ErrorListener errorListener) {
        super(Method.POST, url, errorListener);
        this.mListener = listener;
        this.mErrorListener = errorListener;
        this.mHeaders = headers;
        this.mMimeType = mimeType;
        this.mMultipartBody = multipartBody;
    }

    @Override
    public Map<String, String> getHeaders() throws AuthFailureError {
        return (mHeaders != null) ? mHeaders : super.getHeaders();
    }

    @Override
    public String getBodyContentType() {
        return mMimeType;
    }

    @Override
    public byte[] getBody() throws AuthFailureError {
        return mMultipartBody;
    }

    @Override
    protected Response<NetworkResponse> parseNetworkResponse(NetworkResponse response) {
        try {
            return Response.success(
                    response,
                    HttpHeaderParser.parseCacheHeaders(response));
        } catch (Exception e) {
            return Response.error(new ParseError(e));
        }
    }

    @Override
    protected void deliverResponse(NetworkResponse response) {
        mListener.onResponse(response);
    }

    @Override
    public void deliverError(VolleyError error) {
        mErrorListener.onErrorResponse(error);
    }
}

更新：

有关文本部分，请参阅以下@ RacZo的答案。

For text part, please refer to @RacZo's answer below.

推荐答案

尼斯回答@BNK！

只是想添加到答案......我试图找出如何添加文本字段身体和创建下面的函数来做到这一点：

Just want to add to the answer... I was trying to figure how to append text fields to the body and created the following function to do it:

private void buildTextPart(DataOutputStream dataOutputStream, String parameterName, String parameterValue) throws IOException {
    dataOutputStream.writeBytes(twoHyphens + boundary + lineEnd);
    dataOutputStream.writeBytes("Content-Disposition: form-data; name=\"" + parameterName + "\"" + lineEnd);
    dataOutputStream.writeBytes("Content-Type: text/plain; charset=UTF-8" + lineEnd);
    dataOutputStream.writeBytes(lineEnd);
    dataOutputStream.writeBytes(parameterValue + lineEnd);
}

这是工作pretty的很好，所以我希望它能帮助。

It is working pretty well, so I hope it helps .

这篇关于工作POST multipart请求与截击和不HttpEntity的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！