/*
    * ====================================================================
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you 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 software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   */
  
  package org.apache.hc.core5.http.impl.io;
  
  import java.io.ByteArrayInputStream;
  import java.io.InterruptedIOException;
  import java.nio.charset.StandardCharsets;
  
  import org.apache.hc.core5.http.ClassicHttpResponse;
  import org.apache.hc.core5.http.Header;
  import org.apache.hc.core5.http.MessageConstraintException;
  import org.apache.hc.core5.http.NoHttpResponseException;
  import org.apache.hc.core5.http.config.Http1Config;
  import org.apache.hc.core5.http.io.SessionInputBuffer;
  import org.junit.Assert;
  import org.junit.Test;
  
  /**
   * Unit tests for {@link DefaultHttpResponseParser}.
   */
  public class TestResponseParser {
  
      @Test
      public void testBasicMessageParsing() throws Exception {
          final String s =
              "HTTP/1.1 200 OK\r\n" +
              "Server: whatever\r\n" +
              "Date: some date\r\n" +
              "Set-Cookie: c1=stuff\r\n" +
              "\r\n";
          final ByteArrayInputStream inputStream = new ByteArrayInputStream(s.getBytes(StandardCharsets.US_ASCII));
          final SessionInputBuffer inBuffer = new SessionInputBufferImpl(16, StandardCharsets.US_ASCII.newDecoder());
  
          final DefaultHttpResponseParser parser = new DefaultHttpResponseParser();
          final ClassicHttpResponse httpresponse = parser.parse(inBuffer, inputStream);
  
          Assert.assertEquals(200, httpresponse.getCode());
          Assert.assertEquals("OK", httpresponse.getReasonPhrase());
          final Header[] headers = httpresponse.getHeaders();
          Assert.assertEquals(3, headers.length);
      }
  
      @Test(expected = NoHttpResponseException.class)
      public void testConnectionClosedException() throws Exception {
          final ByteArrayInputStream inputStream = new ByteArrayInputStream(new byte[] {});
          final SessionInputBuffer inBuffer = new SessionInputBufferImpl(16);
  
          final DefaultHttpResponseParser parser = new DefaultHttpResponseParser();
          parser.parse(inBuffer, inputStream);
      }
  
      @Test
      public void testBasicMessageParsingLeadingEmptyLines() throws Exception {
          final String s =
                  "\r\n" +
                  "\r\n" +
                  "HTTP/1.1 200 OK\r\n" +
                  "Server: whatever\r\n" +
                  "\r\n";
          final ByteArrayInputStream inputStream = new ByteArrayInputStream(s.getBytes(StandardCharsets.US_ASCII));
          final SessionInputBuffer inBuffer = new SessionInputBufferImpl(16, StandardCharsets.US_ASCII.newDecoder());
  
          final DefaultHttpResponseParser parser = new DefaultHttpResponseParser(
                  Http1Config.custom().setMaxEmptyLineCount(3).build());
          final ClassicHttpResponse httpresponse = parser.parse(inBuffer, inputStream);
  
          Assert.assertEquals(200, httpresponse.getCode());
          Assert.assertEquals("OK", httpresponse.getReasonPhrase());
          final Header[] headers = httpresponse.getHeaders();
          Assert.assertEquals(1, headers.length);
      }
  
      @Test(expected = MessageConstraintException.class)
      public void testBasicMessageParsingTooManyLeadingEmptyLines() throws Exception {
         final String s =
                 "\r\n" +
                 "\r\n" +
                 "\r\n" +
                 "HTTP/1.1 200 OK\r\n" +
                 "Server: whatever\r\n" +
                 "\r\n";
         final ByteArrayInputStream inputStream = new ByteArrayInputStream(s.getBytes(StandardCharsets.US_ASCII));
         final SessionInputBuffer inBuffer = new SessionInputBufferImpl(16, StandardCharsets.US_ASCII.newDecoder());
 
         final DefaultHttpResponseParser parser = new DefaultHttpResponseParser(
                 Http1Config.custom().setMaxEmptyLineCount(3).build());
         parser.parse(inBuffer, inputStream);
     }
 
     @Test
     public void testMessageParsingTimeout() throws Exception {
         final String s =
             "HTTP\000/1.1 200\000 OK\r\n" +
             "Server: wha\000tever\r\n" +
             "Date: some date\r\n" +
             "Set-Coo\000kie: c1=stuff\r\n" +
             "\000\r\n";
         final TimeoutByteArrayInputStreamrrayInputStream.html#TimeoutByteArrayInputStream">TimeoutByteArrayInputStream inputStream = new TimeoutByteArrayInputStream(s.getBytes(StandardCharsets.US_ASCII));
         final SessionInputBuffer inBuffer = new SessionInputBufferImpl(16);
 
         final DefaultHttpResponseParser parser = new DefaultHttpResponseParser();
 
         int timeoutCount = 0;
 
         ClassicHttpResponse httpresponse = null;
         for (int i = 0; i < 10; i++) {
             try {
                 httpresponse = parser.parse(inBuffer, inputStream);
                 break;
             } catch (final InterruptedIOException ex) {
                 timeoutCount++;
             }
         }
         Assert.assertNotNull(httpresponse);
         Assert.assertEquals(5, timeoutCount);
 
         Assert.assertEquals(200, httpresponse.getCode());
         Assert.assertEquals("OK", httpresponse.getReasonPhrase());
         final Header[] headers = httpresponse.getHeaders();
         Assert.assertEquals(3, headers.length);
     }
 
 }