javax.servlet.http
public class HttpUtils extends Object
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.
| Constructor Summary | |
|---|---|
| HttpUtils()
Constructs an empty HttpUtils object.
| |
| Method Summary | |
|---|---|
| static StringBuffer | getRequestURL(HttpServletRequest req)
Reconstructs the URL the client used to make the request,
using information in the HttpServletRequest object.
|
| static Hashtable | 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.
|
| static Hashtable | parseQueryString(String s)
Parses a query string passed from the client to the
server and builds a HashTable object
with key-value pairs.
|
HttpUtils object.
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 a HttpServletRequest object
containing the client's request
Returns: a StringBuffer object containing
the reconstructed URL
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 an integer specifying the length,
in characters, of the
ServletInputStream
object that is also passed to this
method
in the ServletInputStream
object that contains the data sent
from the client
Returns: a HashTable object built
from the parsed key-value pairs
Throws: IllegalArgumentException if the data sent by the POST method is invalid
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 a string containing the query to be parsed
Returns: a HashTable object built
from the parsed key-value pairs
Throws: IllegalArgumentException if the query string is invalid