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javax.servlet.http

public Class HttpUtils

extends Object
Class Inheritance
Imports
java.io.IOException, java.util.Hashtable, .ResourceBundle, .StringTokenizer, javax.servlet.ServletInputStream

Deprecated

As of Java(tm) Servlet API 2.3. These methods were only useful with the default encoding and have been moved to the request interfaces.

Version
$Rev: 46019 $ $Date: 2004-09-14 04:56:06 -0500 (Tue, 14 Sep 2004) $

Field Summary

Modifier and TypeField and Description
private static final String
private static ResourceBundle

Constructor Summary

AccessConstructor and Description
public
HttpUtils()

Constructs an empty HttpUtils object.

Method Summary

Modifier and TypeMethod and Description
public static StringBuffer

Returns:

a StringBuffer object containing the reconstructed URL
getRequestURL
(HttpServletRequest
a HttpServletRequest object containing the client's request
req
)

Reconstructs the URL the client used to make the request, using information in the HttpServletRequest object.

private static String
parseName(String s, StringBuffer sb)

Parse a name in the query string.

public static Hashtable<K, V>

Returns:

a HashTable object built from the parsed key-value pairs
parsePostData
(int
an integer specifying the length, in characters, of the ServletInputStream object that is also passed to this method
len
,
ServletInputStream
the ServletInputStream object that contains the data sent from the client
in
)

Parses data from an HTML form that the client sends to the server using the HTTP POST method and the application/x-www-form-urlencoded MIME type.

public static Hashtable<K, V>

Returns:

a HashTable object built from the parsed key-value pairs
parseQueryString
(String
a string containing the query to be parsed
s
)

Parses a query string passed from the client to the server and builds a HashTable object with key-value pairs.

Inherited from java.lang.Object:
cloneequalsfinalizegetClasshashCodenotifynotifyAlltoStringwaitwaitwait

Field Detail

LSTRING_FILEback to summary
private static final String LSTRING_FILE
lStringsback to summary
private static ResourceBundle lStrings

Constructor Detail

HttpUtilsback to summary
public HttpUtils()

Constructs an empty HttpUtils object.

Method Detail

getRequestURLback to summary
public static StringBuffer getRequestURL(HttpServletRequest req)

Reconstructs the URL the client used to make the request, using information in the HttpServletRequest object. The returned URL contains a protocol, server name, port number, and server path, but it does not include query string parameters.

Because this method returns a StringBuffer, not a string, you can modify the URL easily, for example, to append query parameters.

This method is useful for creating redirect messages and for reporting errors.

Parameters
req:HttpServletRequest

a HttpServletRequest object containing the client's request

Returns:StringBuffer

a StringBuffer object containing the reconstructed URL

parseNameback to summary
private static String parseName(String s, StringBuffer sb)

Parse a name in the query string.

parsePostDataback to summary
public static Hashtable<K, V> parsePostData(int len, ServletInputStream in)

Parses data from an HTML form that the client sends to the server using the HTTP POST method and the application/x-www-form-urlencoded MIME type.

The data sent by the POST method contains key-value pairs. A key can appear more than once in the POST data with different values. However, the key appears only once in the hashtable, with its value being an array of strings containing the multiple values sent by the POST method.

The keys and values in the hashtable are stored in their decoded form, so any + characters are converted to spaces, and characters sent in hexadecimal notation (like %xx) are converted to ASCII characters.

Parameters
len:int

an integer specifying the length, in characters, of the ServletInputStream object that is also passed to this method

in:ServletInputStream

the ServletInputStream object that contains the data sent from the client

Returns:Hashtable<K, V>

a HashTable object built from the parsed key-value pairs

Exceptions
IllegalArgumentException:
if the data sent by the POST method is invalid
parseQueryStringback to summary
public static Hashtable<K, V> parseQueryString(String s)

Parses a query string passed from the client to the server and builds a HashTable object with key-value pairs. The query string should be in the form of a string packaged by the GET or POST method, that is, it should have key-value pairs in the form key=value, with each pair separated from the next by a & character.

A key can appear more than once in the query string with different values. However, the key appears only once in the hashtable, with its value being an array of strings containing the multiple values sent by the query string.

The keys and values in the hashtable are stored in their decoded form, so any + characters are converted to spaces, and characters sent in hexadecimal notation (like %xx) are converted to ASCII characters.

Parameters
s:String

a string containing the query to be parsed

Returns:Hashtable<K, V>

a HashTable object built from the parsed key-value pairs

Exceptions
IllegalArgumentException:
if the query string is invalid