Package org.apache.tomcat.util.http.parser

Class HttpParser

java.lang.Object

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

public class HttpParser
extends 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.)

Constructor Summary

Constructors

Constructor	Description
HttpParser(String relaxedPathChars, String relaxedQueryChars)

Method Summary

Modifier and Type	Method	Description
static boolean	isAbsolutePath(int c)
boolean	isAbsolutePathRelaxed(int c)
static boolean	isAlpha(int c)
static boolean	isControl(int c)
static boolean	isHex(int c)
static boolean	isHttpProtocol(int c)
static boolean	isNotRequestTarget(int c)
boolean	isNotRequestTargetRelaxed(int c)
static boolean	isNumeric(int c)
static boolean	isQuery(int c)
boolean	isQueryRelaxed(int c)
static boolean	isScheme(int c)
static boolean	isScheme(String s)	Is the provided String a scheme as per RFC 3986?
static boolean	isToken(int c)
static boolean	isToken(String s)	Is the provided String a token as per RFC 7230?
static boolean	isUserInfo(int c)
static String	unquote(String input)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

HttpParser

public HttpParser(String relaxedPathChars,
 String relaxedQueryChars)

Method Details

isNotRequestTargetRelaxed

public boolean isNotRequestTargetRelaxed(int c)

isAbsolutePathRelaxed

public boolean isAbsolutePathRelaxed(int c)

isQueryRelaxed

public boolean isQueryRelaxed(int c)

unquote

public static String unquote(String input)

isToken

public static boolean isToken(int c)

isToken

public static boolean isToken(String s)

Is the provided String a token as per RFC 7230?
Note: token = 1 * tchar (RFC 7230)
Since a token requires at least 1 tchar, null and the empty string ("") are not considered to be valid tokens.

Parameters:

s - The string to test

Returns:

true if the string is a valid token, otherwise false

isHex

public static boolean isHex(int c)

isNotRequestTarget

public static boolean isNotRequestTarget(int c)

isHttpProtocol

public static boolean isHttpProtocol(int c)

isAlpha

public static boolean isAlpha(int c)

isNumeric

public static boolean isNumeric(int c)

isScheme

public static boolean isScheme(int c)

isScheme

public static boolean isScheme(String s)

Is the provided String a scheme as per RFC 3986?
Note: scheme = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." )
Since a scheme requires at least 1 ALPHA, null and the empty string ("") are not considered to be valid tokens.

Parameters:

s - The string to test

Returns:

true if the string is a valid scheme, otherwise false

isUserInfo

public static boolean isUserInfo(int c)

isAbsolutePath

public static boolean isAbsolutePath(int c)

isQuery

public static boolean isQuery(int c)

isControl

public static boolean isControl(int c)