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28 package org.apache.http.impl.conn;
29
30 import java.io.IOException;
31
32 import org.apache.commons.logging.Log;
33 import org.apache.commons.logging.LogFactory;
34 import org.apache.http.HttpException;
35 import org.apache.http.HttpResponse;
36 import org.apache.http.HttpResponseFactory;
37 import org.apache.http.NoHttpResponseException;
38 import org.apache.http.ProtocolException;
39 import org.apache.http.StatusLine;
40 import org.apache.http.config.MessageConstraints;
41 import org.apache.http.impl.DefaultHttpResponseFactory;
42 import org.apache.http.impl.io.AbstractMessageParser;
43 import org.apache.http.io.SessionInputBuffer;
44 import org.apache.http.message.LineParser;
45 import org.apache.http.message.ParserCursor;
46 import org.apache.http.params.HttpParams;
47 import org.apache.http.util.Args;
48 import org.apache.http.util.CharArrayBuffer;
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55
56 @SuppressWarnings("deprecation")
57 public class DefaultHttpResponseParser extends AbstractMessageParser<HttpResponse> {
58
59 private final Log log = LogFactory.getLog(getClass());
60
61 private final HttpResponseFactory responseFactory;
62 private final CharArrayBuffer lineBuf;
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67
68 @Deprecated
69 public DefaultHttpResponseParser(
70 final SessionInputBuffer buffer,
71 final LineParser parser,
72 final HttpResponseFactory responseFactory,
73 final HttpParams params) {
74 super(buffer, parser, params);
75 Args.notNull(responseFactory, "Response factory");
76 this.responseFactory = responseFactory;
77 this.lineBuf = new CharArrayBuffer(128);
78 }
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93 public DefaultHttpResponseParser(
94 final SessionInputBuffer buffer,
95 final LineParser lineParser,
96 final HttpResponseFactory responseFactory,
97 final MessageConstraints constraints) {
98 super(buffer, lineParser, constraints);
99 this.responseFactory = responseFactory != null ? responseFactory :
100 DefaultHttpResponseFactory.INSTANCE;
101 this.lineBuf = new CharArrayBuffer(128);
102 }
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113 public DefaultHttpResponseParser(
114 final SessionInputBuffer buffer, final MessageConstraints constraints) {
115 this(buffer, null, null, constraints);
116 }
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125 public DefaultHttpResponseParser(final SessionInputBuffer buffer) {
126 this(buffer, null, null, MessageConstraints.DEFAULT);
127 }
128
129 @Override
130 protected HttpResponse parseHead(
131 final SessionInputBuffer sessionBuffer) throws IOException, HttpException {
132
133 int count = 0;
134 ParserCursor cursor = null;
135 do {
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137 this.lineBuf.clear();
138 final int i = sessionBuffer.readLine(this.lineBuf);
139 if (i == -1 && count == 0) {
140
141 throw new NoHttpResponseException("The target server failed to respond");
142 }
143 cursor = new ParserCursor(0, this.lineBuf.length());
144 if (lineParser.hasProtocolVersion(this.lineBuf, cursor)) {
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146 break;
147 } else if (i == -1 || reject(this.lineBuf, count)) {
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149 throw new ProtocolException("The server failed to respond with a " +
150 "valid HTTP response");
151 }
152 if (this.log.isDebugEnabled()) {
153 this.log.debug("Garbage in response: " + this.lineBuf.toString());
154 }
155 count++;
156 } while(true);
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158 final StatusLine statusline = lineParser.parseStatusLine(this.lineBuf, cursor);
159 return this.responseFactory.newHttpResponse(statusline, null);
160 }
161
162 protected boolean reject(final CharArrayBuffer line, final int count) {
163 return false;
164 }
165
166 }