serguei.http.MultipartBodyParser Maven / Gradle / Ivy
package serguei.http;
import java.io.IOException;
import java.io.InputStream;
class MultipartBodyParser {
private final InputStream inputStream;
private final String border;
private UpToBorderStreamReader reader;
private boolean firstBorderRead;
MultipartBodyParser(InputStream inputStream, String border) {
this.inputStream = inputStream;
this.border = border;
this.reader = new UpToBorderStreamReader(inputStream, ("--" + border).getBytes());
}
public BodyPart readNextBodyPart() throws IOException {
if (!firstBorderRead) {
reader.read();
reader = new UpToBorderStreamReader(inputStream, ("\r\n--" + border).getBytes());
firstBorderRead = true;
}
if (readToCheckIfFinalBorder()) {
inputStream.skip(2); // final CRLF
return null;
}
HttpHeaders headers = new MultipartHttpHeaders();
headers.readHeaders(new HeaderLineReader(inputStream));
byte[] body = reader.read();
return new BodyPart(headers, body);
}
private boolean readToCheckIfFinalBorder() throws IOException {
int firstByte = inputStream.read();
if (firstByte == -1) {
return true;
}
int secondByte = inputStream.read();
if (secondByte == -1) {
return true;
}
return firstByte == '-' && secondByte == '-';
}
private class MultipartHttpHeaders extends HttpHeaders {
}
}