Java和PHP配合：deflate(压缩)和inflate(解压)

一、Java中deflate压缩发送给php解压缩

Android中deflate代码

OutputStream urlOutStream = urlConnection.getOutputStream();

// 要使用no_wrap的Deflater，php才能解压，9是最高的压缩级别，可以设置为1-9的级别，1速度最快

DeflaterOutputStream deflaterOut = new DeflaterOutputStream(urlOutStream, new Deflater(9, true));

deflaterOut.write((stringToPost[0]).getBytes());

deflaterOut.close();

urlOutStream.close();

PHP中inflate及deflate代码 (有时候终端方法压缩时会自动base64加密一次，php需要先解base64)https://tool.oschina.net/encrypt?type=3

// 首先获取post的字符串：

// 因为是直接写入的压缩字符串，

// 通过$_POST[]并不能获取post内容，

// 可以通过原始请求数据的只读输入流获得post内容

$postStr = file_get_contents(‘php://input‘);

// Java中默认的Deflater的数据格式有wrap，Java中应设置no_wrap的Deflater

// 如果Java中没有指定no_wrap的Deflater，则PHP中通过下面的算法将wrap去掉，也可以正常解压

// $deflateForPHP = substr($postStr, 2, -4);

// 解压缩获得请求的内容

$plainRequest = gzinflate($postStr);

// code here ...

// 将处理结果压缩后返回请求端

$result = "准备发给android的处理结果";

echo gzdeflate($result);

?>

Android中inflate代码

if (urlConnection.getResponseCode() == HttpURLConnection.HTTP_OK) {

InputStream urlInputStream = urlConnection.getInputStream();

// php中gzdeflate()压缩的结果，没有wrap，需要自行计算头尾验证字符，

// 或者指定new Inflater(true)的解压器才能正确解压(注意：没了传输错误校验)

InflaterInputStream inflaterIn = new InflaterInputStream(urlInputStream, new Inflater(true));

BufferedReader reader = new BufferedReader(new InputStreamReader(inflaterIn));

String res = "", line;

while ((line = reader.readLine()) != null) {

res += line;

}

Log.i(TAG, "Response length: " + res.length() + " response: " + res);

reader.close();

inflaterIn.close();

urlInputStream.close();

urlConnection.disconnect();

return res;

}

二、完整代码：

private class mHttp extends AsyncTask {

private URL mUrl;

private String mMethod = "GET";

private int mHttpTimeout = 3000; /* milliseconds */

private String TAG = "mHttp";

public mHttp(String url, String method) throws MalformedURLException {

mUrl = new URL(url);

if(method.toUpperCase().contains("POST")) mMethod = "POST";

}

public mHttp(String url) throws MalformedURLException {

mUrl = new URL(url);

}

@Override

protected String doInBackground(String... stringToPost) {

if (mUrl != null) {

try {

HttpURLConnection urlConnection = (HttpURLConnection) mUrl.openConnection();

urlConnection.setReadTimeout(mHttpTimeout);

urlConnection.setConnectTimeout(mHttpTimeout);

urlConnection.setRequestMethod(mMethod);

urlConnection.setDoInput(true);

// PHP已经应用pzdeflate()处理了结果，添加Accept-Encoding的header避免Apache再deflate处理

urlConnection.addRequestProperty("Accept-Encoding", "q=1.0 identity");

if (mMethod.equals("POST")) {

urlConnection.setDoOutput(true);

urlConnection.addRequestProperty("Content-Encoding", "deflate");

OutputStream urlOutStream = urlConnection.getOutputStream();

DeflaterOutputStream deflaterOut = new DeflaterOutputStream(urlOutStream, new Deflater(9, true));

deflaterOut.write((stringToPost[0]).getBytes());

deflaterOut.close();

urlOutStream.close();

}

urlConnection.connect();

if (urlConnection.getResponseCode() == HttpURLConnection.HTTP_OK) {

InputStream urlInputStream = urlConnection.getInputStream();

InflaterInputStream inflaterIn = new InflaterInputStream(urlInputStream, new Inflater(true));

BufferedReader reader = new BufferedReader(new InputStreamReader(inflaterIn));

String res = "", line;

while ((line = reader.readLine()) != null) {

res += line;

}

Log.i(TAG, "Response length: " + res.length() + " response: " + res);

reader.close();

inflaterIn.close();

urlInputStream.close();

urlConnection.disconnect();

return res;

} else {

// show response code.

Log.i(TAG, "doInBackground: responseCode: " + urlConnection.getResponseCode());

urlConnection.disconnect();

return null;

}

} catch (Exception e) {

e.printStackTrace();

}

}

return null;

}

@Override

protected void onPostExecute(String result) {

Log.i(TAG, "onPostExecute: " + result);

// 处理result字符串，例如显示在UI组件上

// code here...

}

}

mHttp http = new mHttp("http://examle.com/page.php", "post");

http.execute("String to be posted to the server");

用到的链接：

php://input 原始请求数据的只读输入流

DeflaterOutputStream

Deflater

InflaterInputStream

Inflater

gzinflate-in-java

原文：https://www.cnblogs.com/cxscode/p/12603199.html