org.apache.catalina.util
Class RequestUtil

java.lang.Object
  org.apache.catalina.util.RequestUtil

public final class RequestUtil
extends java.lang.Object

General purpose request parsing and encoding utility methods.

Author:

Craig R. McClanahan, Tim Tye

RequestUtil

public RequestUtil()

filter

public static java.lang.String filter(java.lang.String message)

Filter the specified message string for characters that are sensitive in HTML. This avoids potential attacks caused by including JavaScript codes in the request URL that is often reported in error messages.

Parameters:

message - The message string to be filtered

normalize

public static java.lang.String normalize(java.lang.String path)

Normalize a relative URI path that may have relative values ("/./", "/../", and so on ) it it. WARNING - This method is useful only for normalizing application-generated paths. It does not try to perform security checks for malicious input.

Parameters:

path - Relative path to be normalized

Returns:

The normalized path or null if the path cannot be normalized

normalize

public static java.lang.String normalize(java.lang.String path,
                                         boolean replaceBackSlash)

Normalize a relative URI path that may have relative values ("/./", "/../", and so on ) it it. WARNING - This method is useful only for normalizing application-generated paths. It does not try to perform security checks for malicious input.

Parameters:

path - Relative path to be normalized

replaceBackSlash - Should '\\' be replaced with '/'

Returns:

The normalized path or null if the path cannot be normalized

parseParameters

public static void parseParameters(java.util.Map map,
                                   java.lang.String data,
                                   java.lang.String encoding)
                            throws java.io.UnsupportedEncodingException

Append request parameters from the specified String to the specified Map. It is presumed that the specified Map is not accessed from any other thread, so no synchronization is performed.

IMPLEMENTATION NOTE: URL decoding is performed individually on the parsed name and value elements, rather than on the entire query string ahead of time, to properly deal with the case where the name or value includes an encoded "=" or "&" character that would otherwise be interpreted as a delimiter.

Parameters:

map - Map that accumulates the resulting parameters

data - Input string containing request parameters

Throws:

java.lang.IllegalArgumentException - if the data is malformed

java.io.UnsupportedEncodingException

URLDecode

public static java.lang.String URLDecode(java.lang.String str)

Decode and return the specified URL-encoded String. When the byte array is converted to a string, the system default character encoding is used... This may be different than some other servers. It is assumed the string is not a query string.

Parameters:

str - The url-encoded string

Throws:

java.lang.IllegalArgumentException - if a '%' character is not followed by a valid 2-digit hexadecimal number

URLDecode

public static java.lang.String URLDecode(java.lang.String str,
                                         java.lang.String enc)

Decode and return the specified URL-encoded String. It is assumed the string is not a query string.

Parameters:

str - The url-encoded string

enc - The encoding to use; if null, the default encoding is used

Throws:

java.lang.IllegalArgumentException - if a '%' character is not followed by a valid 2-digit hexadecimal number

URLDecode

public static java.lang.String URLDecode(java.lang.String str,
                                         java.lang.String enc,
                                         boolean isQuery)

Decode and return the specified URL-encoded String.

Parameters:

str - The url-encoded string

enc - The encoding to use; if null, the default encoding is used

isQuery - Is this a query string being processed

Throws:

java.lang.IllegalArgumentException - if a '%' character is not followed by a valid 2-digit hexadecimal number

URLDecode

public static java.lang.String URLDecode(byte[] bytes)

Decode and return the specified URL-encoded byte array. It is assumed the string is not a query string.

Parameters:

bytes - The url-encoded byte array

Throws:

java.lang.IllegalArgumentException - if a '%' character is not followed by a valid 2-digit hexadecimal number

URLDecode

public static java.lang.String URLDecode(byte[] bytes,
                                         java.lang.String enc)

Decode and return the specified URL-encoded byte array. It is assumed the string is not a query string.

Parameters:

bytes - The url-encoded byte array

enc - The encoding to use; if null, the default encoding is used

Throws:

java.lang.IllegalArgumentException - if a '%' character is not followed by a valid 2-digit hexadecimal number

URLDecode

public static java.lang.String URLDecode(byte[] bytes,
                                         java.lang.String enc,
                                         boolean isQuery)

Decode and return the specified URL-encoded byte array.

Parameters:

bytes - The url-encoded byte array

enc - The encoding to use; if null, the default encoding is used

isQuery - Is this a query string being processed

Throws:

java.lang.IllegalArgumentException - if a '%' character is not followed by a valid 2-digit hexadecimal number

parseParameters

public static void parseParameters(java.util.Map map,
                                   byte[] data,
                                   java.lang.String encoding)
                            throws java.io.UnsupportedEncodingException

Append request parameters from the specified String to the specified Map. It is presumed that the specified Map is not accessed from any other thread, so no synchronization is performed.

IMPLEMENTATION NOTE: URL decoding is performed individually on the parsed name and value elements, rather than on the entire query string ahead of time, to properly deal with the case where the name or value includes an encoded "=" or "&" character that would otherwise be interpreted as a delimiter. NOTE: byte array data is modified by this method. Caller beware.

Parameters:

map - Map that accumulates the resulting parameters

data - Input string containing request parameters

encoding - Encoding to use for converting hex

Throws:

java.io.UnsupportedEncodingException - if the data is malformed