Java Servlet API 4.0.1 · javax.servlet.http.HttpUtils

Modifier and Type	Field and Description
private static final String	LSTRING_FILE
private static ResourceBundle	lStrings

Access	Constructor and Description
public	HttpUtils() Constructs an empty `HttpUtils` object.

Method Summary

Modifier and Type	Method 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, StringBuilder sb)
public static Hashtable<String, String[]>	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<String, String[]>	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:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

LSTRING_FILE	back to summary
private static final String LSTRING_FILE

lStrings	back to summary
private static ResourceBundle lStrings

HttpUtils	back to summary
public HttpUtils() Constructs an empty `HttpUtils` object.

Method Detail

getRequestURL back to summary

getRequestURL	back 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

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

parseName	back to summary
private static String parseName(String s, StringBuilder sb)

parsePostData back to summary

parsePostData	back to summary
public static Hashtable<String, String[]> 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<String, String[]> a `HashTable` object built from the parsed key-value pairs Exceptions IllegalArgumentException: if the data sent by the POST method is invalid

public static Hashtable<String, String[]> 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<String, String[]>

a HashTable object built from the parsed key-value pairs

Exceptions

IllegalArgumentException:: if the data sent by the POST method is invalid

parseQueryString back to summary

parseQueryString	back to summary
public static Hashtable<String, String[]> 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<String, String[]> a `HashTable` object built from the parsed key-value pairs Exceptions IllegalArgumentException: if the query string is invalid

public static Hashtable<String, String[]> 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.

Parameters

s:String: a string containing the query to be parsed

Returns:Hashtable<String, String[]>

a HashTable object built from the parsed key-value pairs

Exceptions

IllegalArgumentException:: if the query string is invalid

public Class HttpUtils

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail