This class is a specialization of
URLConnection. An instance of this class is
returned when the openConnection( ) method is
called for a URL object that uses the HTTP
protocol. The many
constants
defined by this class are the status codes returned by HTTP servers.
setRequestMethod(
) specifies what kind of HTTP request is made.
The contents of this request must be sent through the
OutputStream returned by the
getOutputStream(
) method of the superclass. Once an HTTP
request has been sent, getresponseCode(
) returns the HTTP server's
response code as an integer, and geTResponseMessage(
) returns the server's
response message. The disconnect(
)
method closes the connection. The static setFollowRedirects(
) specifies whether URL connections that use the HTTP
protocol should automatically follow redirect responses sent by HTTP
servers. In order to successfully use this class, you need to
understand the details of the HTTP protocol.
public abstract class HttpURLConnection extends URLConnection {
// Protected Constructors
protected HttpURLConnection(URL u);
// Public Constants
public static final int HTTP_ACCEPTED; =202
public static final int HTTP_BAD_GATEWAY; =502
public static final int HTTP_BAD_METHOD; =405
public static final int HTTP_BAD_REQUEST; =400
public static final int HTTP_CLIENT_TIMEOUT; =408
public static final int HTTP_CONFLICT; =409
public static final int HTTP_CREATED; =201
public static final int HTTP_ENTITY_TOO_LARGE; =413
public static final int HTTP_FORBIDDEN; =403
public static final int HTTP_GATEWAY_TIMEOUT; =504
public static final int HTTP_GONE; =410
public static final int HTTP_INTERNAL_ERROR; =500
public static final int HTTP_LENGTH_REQUIRED; =411
public static final int HTTP_MOVED_PERM; =301
public static final int HTTP_MOVED_TEMP; =302
public static final int HTTP_MULT_CHOICE; =300
public static final int HTTP_NO_CONTENT; =204
public static final int HTTP_NOT_ACCEPTABLE; =406
public static final int HTTP_NOT_AUTHORITATIVE; =203
public static final int HTTP_NOT_FOUND; =404
1.3 public static final int HTTP_NOT_IMPLEMENTED; =501
public static final int HTTP_NOT_MODIFIED; =304
public static final int HTTP_OK; =200
public static final int HTTP_PARTIAL; =206
public static final int HTTP_PAYMENT_REQUIRED; =402
public static final int HTTP_PRECON_FAILED; =412
public static final int HTTP_PROXY_AUTH; =407
public static final int HTTP_REQ_TOO_LONG; =414
public static final int HTTP_RESET; =205
public static final int HTTP_SEE_OTHER; =303
public static final int HTTP_UNAUTHORIZED; =401
public static final int HTTP_UNAVAILABLE; =503
public static final int HTTP_UNSUPPORTED_TYPE; =415
public static final int HTTP_USE_PROXY; =305
public static final int HTTP_VERSION; =505
// Public Class Methods
public static boolean getFollowRedirects( );
public static void setFollowRedirects(boolean set);
// Public Instance Methods
public abstract void disconnect( );
1.2 public java.io.InputStream getErrorStream( ); constant
1.3 public boolean getInstanceFollowRedirects( );
public String getRequestMethod( );
public int getResponseCode( ) throws java.io.IOException;
public String getResponseMessage( ) throws java.io.IOException;
5.0 public void setChunkedStreamingMode(int chunklen);
5.0 public void setFixedLengthStreamingMode(int contentLength);
1.3 public void setInstanceFollowRedirects(boolean followRedirects);
public void setRequestMethod(String method) throws ProtocolException;
public abstract boolean usingProxy( );
// Public Methods Overriding URLConnection
1.4 public String getHeaderField(int n); constant
1.3 public long getHeaderFieldDate(String name, long Default);
1.4 public String getHeaderFieldKey(int n); constant
1.2 public java.security.Permission getPermission( )
throws java.io.IOException;
// Protected Instance Fields
5.0 protected int chunkLength;
5.0 protected int fixedContentLength;
1.3 protected boolean instanceFollowRedirects;
protected String method;
protected int responseCode;
protected String responseMessage;
// Deprecated Public Fields
# public static final int HTTP_SERVER_ERROR; =500
}
