org.apache.tomcat.util.http.parser
Class HttpParser

java.lang.Object
  org.apache.tomcat.util.http.parser.HttpParser

public class HttpParser
extends java.lang.Object

HTTP header value parser implementation. Parsing HTTP headers as per RFC2616 is not always as simple as it first appears. For headers that only use tokens the simple approach will normally be sufficient. However, for the other headers, while simple code meets 99.9% of cases, there are often some edge cases that make things far more complicated. The purpose of this parser is to let the parser worry about the edge cases. It provides tolerant (where safe to do so) parsing of HTTP header values assuming that wrapped header lines have already been unwrapped. (The Tomcat header processing code does the unwrapping.) Provides parsing of the following HTTP header values as per RFC 2616: - Authorization for DIGEST authentication - MediaType (used for Content-Type header) Support for additional headers will be provided as required.

HttpParser

public HttpParser()

parseAuthorizationDigest

public static java.util.Map<java.lang.String,java.lang.String> parseAuthorizationDigest(java.io.StringReader input)
                                                                                 throws java.lang.IllegalArgumentException,
                                                                                        java.io.IOException

Parses an HTTP Authorization header for DIGEST authentication as per RFC 2617 section 3.2.2.

Parameters:

input - The header value to parse

Returns:

A map of directives and values as Strings or null if a parsing error occurs. Although the values returned are Strings they will have been validated to ensure that they conform to RFC 2617.

Throws:

java.lang.IllegalArgumentException - If the header does not conform to RFC 2617

java.io.IOException - If an error occurs while reading the input

parseMediaType

public static MediaType parseMediaType(java.io.StringReader input)
                                throws java.io.IOException

Throws:

java.io.IOException

unquote

public static java.lang.String unquote(java.lang.String input)

isToken

public static boolean isToken(int c)

isHex

public static boolean isHex(int c)

isNotRequestTarget

public static boolean isNotRequestTarget(int c)

isHttpProtocol

public static boolean isHttpProtocol(int c)