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Diffstat (limited to 'src/org/apache/http/message/LineParser.java')
| -rw-r--r-- | src/org/apache/http/message/LineParser.java | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/src/org/apache/http/message/LineParser.java b/src/org/apache/http/message/LineParser.java new file mode 100644 index 0000000..d1bcd15 --- /dev/null +++ b/src/org/apache/http/message/LineParser.java @@ -0,0 +1,156 @@ +/* + * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/message/LineParser.java $ + * $Revision: 589374 $ + * $Date: 2007-10-28 09:25:07 -0700 (Sun, 28 Oct 2007) $ + * + * ==================================================================== + * 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.http.message; + + +import org.apache.http.ProtocolVersion; +import org.apache.http.ParseException; +import org.apache.http.RequestLine; +import org.apache.http.StatusLine; +import org.apache.http.Header; +import org.apache.http.util.CharArrayBuffer; + + +/** + * Interface for parsing lines in the HEAD section of an HTTP message. + * There are individual methods for parsing a request line, a + * status line, or a header line. + * The lines to parse are passed in memory, the parser does not depend + * on any specific IO mechanism. + * Instances of this interface are expected to be stateless and thread-safe. + * + * @author <a href="mailto:rolandw AT apache.org">Roland Weber</a> + * + * + * <!-- empty lines above to avoid 'svn diff' context problems --> + * @version $Revision: 589374 $ $Date: 2007-10-28 09:25:07 -0700 (Sun, 28 Oct 2007) $ + * + * @since 4.0 + */ +public interface LineParser { + + + /** + * Parses the textual representation of a protocol version. + * This is needed for parsing request lines (last element) + * as well as status lines (first element). + * + * @param buffer a buffer holding the protocol version to parse + * @param cursor the parser cursor containing the current position and + * the bounds within the buffer for the parsing operation + * + * @return the parsed protocol version + * + * @throws ParseException in case of a parse error + */ + ProtocolVersion parseProtocolVersion( + CharArrayBuffer buffer, + ParserCursor cursor) throws ParseException; + + + /** + * Checks whether there likely is a protocol version in a line. + * This method implements a <i>heuristic</i> to check for a + * likely protocol version specification. It does <i>not</i> + * guarantee that {@link #parseProtocolVersion} would not + * detect a parse error. + * This can be used to detect garbage lines before a request + * or status line. + * + * @param buffer a buffer holding the line to inspect + * @param cursor the cursor at which to check for a protocol version, or + * negative for "end of line". Whether the check tolerates + * whitespace before or after the protocol version is + * implementation dependent. + * + * @return <code>true</code> if there is a protocol version at the + * argument index (possibly ignoring whitespace), + * <code>false</code> otherwise + */ + boolean hasProtocolVersion( + CharArrayBuffer buffer, + ParserCursor cursor); + + + /** + * Parses a request line. + * + * @param buffer a buffer holding the line to parse + * @param cursor the parser cursor containing the current position and + * the bounds within the buffer for the parsing operation + * + * @return the parsed request line + * + * @throws ParseException in case of a parse error + */ + RequestLine parseRequestLine( + CharArrayBuffer buffer, + ParserCursor cursor) throws ParseException; + + + /** + * Parses a status line. + * + * @param buffer a buffer holding the line to parse + * @param cursor the parser cursor containing the current position and + * the bounds within the buffer for the parsing operation + * + * @return the parsed status line + * + * @throws ParseException in case of a parse error + */ + StatusLine parseStatusLine( + CharArrayBuffer buffer, + ParserCursor cursor) throws ParseException; + + + /** + * Creates a header from a line. + * The full header line is expected here. Header continuation lines + * must be joined by the caller before invoking this method. + * + * @param buffer a buffer holding the full header line. + * This buffer MUST NOT be re-used afterwards, since + * the returned object may reference the contents later. + * + * @return the header in the argument buffer. + * The returned object MAY be a wrapper for the argument buffer. + * The argument buffer MUST NOT be re-used or changed afterwards. + * + * @throws ParseException in case of a parse error + */ + Header parseHeader(CharArrayBuffer buffer) + throws ParseException + ; + + +} |