public class HttpUtils extends Object
Constructor and Description |
---|
HttpUtils()
Deprecated.
Constructs an empty
HttpUtils object. |
Modifier and Type | Method and Description |
---|---|
static StringBuffer |
getRequestURL(HttpServletRequest req)
Deprecated.
Reconstructs the URL the client used to make the request, using
information in the
HttpServletRequest object. |
static Hashtable |
parsePostData(int len,
ServletInputStream in)
Deprecated.
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)
Deprecated.
Parses a query string passed from the client to the server and builds a
HashTable object with key-value pairs. |
public static Hashtable parseQueryString(String s)
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.
s
- a string containing the query to be parsedHashTable
object built from the parsed key-value
pairsIllegalArgumentException
- if the query string is invalidpublic static Hashtable parsePostData(int len, ServletInputStream in)
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.
len
- an integer specifying the length, in characters, of the
ServletInputStream
object that is also passed to this
methodin
- the ServletInputStream
object that contains the
data sent from the clientHashTable
object built from the parsed key-value
pairsIllegalArgumentException
- if the data sent by the POST
method is invalidpublic static StringBuffer getRequestURL(HttpServletRequest req)
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.
req
- a HttpServletRequest
object containing the
client's requestStringBuffer
object containing the reconstructed
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