Подскажите как правильно начитать InputStream в Фильтре, что имею
MD5ServletInputStream
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public class MD5ServletInputStream extends ServletInputStream {
private final ServletInputStream input;
private final MessageDigest md5;
{
try {
md5 = MessageDigest.getInstance("MD5");
} catch (NoSuchAlgorithmException e) {
throw new ExceptionInInitializerError(e);
}
}
public MD5ServletInputStream(ServletInputStream input) {
this.input = input;
}
public byte[] getHash() {
return md5.digest();
}
@Override
public int read() throws IOException {
int read = input.read();
if (read != -1) {
md5.update((byte) read);
}
return read;
}
public int read(byte b[]) throws IOException {
int read = input.read(b, 0, b.length);
if (read != -1) {
md5.update(b);
}
return read;
}
public int read(byte b[], int off, int len) throws IOException {
int read = input.read(b, off, len);
if (read != -1) {
md5.update(b);
}
return read;
}
}
MD5ServletRequest
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public class MD5ServletRequest extends HttpServletRequestWrapper {
private final MD5ServletInputStream input;
private byte[] bytes = null;
public MD5ServletRequest(HttpServletRequest request) throws IOException {
super(request);
input = new MD5ServletInputStream(request.getInputStream());
}
public ServletInputStream getInputStream() throws IOException {
return input;
}
public byte[] getHash() {
return input.getHash();
}
public BufferedReader getReader() throws IOException {
return new BufferedReader(new InputStreamReader(getInputStream()));
}
public String getMD5() {
byte[] hash = getHash();
StringBuilder hashAsHexString = new StringBuilder(
hash.length * 2);
for (byte b : hash) {
hashAsHexString.append(String.format("%02x", b));
}
return hashAsHexString.toString();
}
}
И часть из фильтра
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public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
HttpServletRequest httpRequest = (HttpServletRequest) request;
MD5ServletRequest md5Request = new MD5ServletRequest(httpRequest);
chain.doFilter(md5Request, response);
}
Хочу, чтоб когда запрос пришел на сервлет
Я мог сделать MD5ServletRequest md5RequestюgetMD5() и получить хэш загружаемого файла
