/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/**
* A URLConnection with support for HTTP-specific features. See
* <A HREF="http://www.w3.org/pub/WWW/Protocols/"> the spec </A> for
* details.
* <p>
*
* Each HttpURLConnection instance is used to make a single request
* but the underlying network connection to the HTTP server may be
* transparently shared by other instances. Calling the close() methods
* on the InputStream or OutputStream of an HttpURLConnection
* after a request may free network resources associated with this
* instance but has no effect on any shared persistent connection.
* Calling the disconnect() method may close the underlying socket
* if a persistent connection is otherwise idle at that time.
*
* <P>The HTTP protocol handler has a few settings that can be accessed through
* System Properties. This covers
* <a href="doc-files/net-properties.html#Proxies">Proxy settings</a> as well as
* <a href="doc-files/net-properties.html#MiscHTTP"> various other settings</a>.
* </P>
*
* @see java.net.HttpURLConnection#disconnect()
* @since JDK1.1
*/
/* instance variables */
/**
* The HTTP method (GET,POST,PUT,etc.).
*/
/**
* The chunk-length when using chunked encoding streaming mode for output.
* A value of <code>-1</code> means chunked encoding is disabled for output.
* @since 1.5
*/
/**
* The fixed content-length when using fixed-length streaming mode.
* A value of <code>-1</code> means fixed-length streaming mode is disabled
* for output.
*
* <P> <B>NOTE:</B> {@link #fixedContentLengthLong} is recommended instead
* of this field, as it allows larger content lengths to be set.
*
* @since 1.5
*/
/**
* The fixed content-length when using fixed-length streaming mode.
* A value of {@code -1} means fixed-length streaming mode is disabled
* for output.
*
* @since 1.7
*/
/**
* Returns the key for the <code>n</code><sup>th</sup> header field.
* Some implementations may treat the <code>0</code><sup>th</sup>
* header field as special, i.e. as the status line returned by the HTTP
* server. In this case, {@link #getHeaderField(int) getHeaderField(0)} returns the status
* line, but <code>getHeaderFieldKey(0)</code> returns null.
*
* @param n an index, where n >=0.
* @return the key for the <code>n</code><sup>th</sup> header field,
* or <code>null</code> if the key does not exist.
*/
return null;
}
/**
* This method is used to enable streaming of a HTTP request body
* without internal buffering, when the content length is known in
* advance.
* <p>
* An exception will be thrown if the application
* attempts to write more data than the indicated
* content-length, or if the application closes the OutputStream
* before writing the indicated amount.
* <p>
* When output streaming is enabled, authentication
* and redirection cannot be handled automatically.
* A HttpRetryException will be thrown when reading
* the response if authentication or redirection are required.
* This exception can be queried for the details of the error.
* <p>
* This method must be called before the URLConnection is connected.
* <p>
* <B>NOTE:</B> {@link #setFixedLengthStreamingMode(long)} is recommended
* instead of this method as it allows larger content lengths to be set.
*
* @param contentLength The number of bytes which will be written
* to the OutputStream.
*
* @throws IllegalStateException if URLConnection is already connected
* or if a different streaming mode is already enabled.
*
* @throws IllegalArgumentException if a content length less than
* zero is specified.
*
* @see #setChunkedStreamingMode(int)
* @since 1.5
*/
if (connected) {
throw new IllegalStateException ("Already connected");
}
if (chunkLength != -1) {
throw new IllegalStateException ("Chunked encoding streaming mode set");
}
if (contentLength < 0) {
throw new IllegalArgumentException ("invalid content length");
}
}
/**
* This method is used to enable streaming of a HTTP request body
* without internal buffering, when the content length is known in
* advance.
*
* <P> An exception will be thrown if the application attempts to write
* more data than the indicated content-length, or if the application
* closes the OutputStream before writing the indicated amount.
*
* <P> When output streaming is enabled, authentication and redirection
* cannot be handled automatically. A {@linkplain HttpRetryException} will
* be thrown when reading the response if authentication or redirection
* are required. This exception can be queried for the details of the
* error.
*
* <P> This method must be called before the URLConnection is connected.
*
* <P> The content length set by invoking this method takes precedence
* over any value set by {@link #setFixedLengthStreamingMode(int)}.
*
* @param contentLength
* The number of bytes which will be written to the OutputStream.
*
* @throws IllegalStateException
* if URLConnection is already connected or if a different
* streaming mode is already enabled.
*
* @throws IllegalArgumentException
* if a content length less than zero is specified.
*
* @since 1.7
*/
if (connected) {
throw new IllegalStateException("Already connected");
}
if (chunkLength != -1) {
throw new IllegalStateException(
"Chunked encoding streaming mode set");
}
if (contentLength < 0) {
throw new IllegalArgumentException("invalid content length");
}
}
/* Default chunk size (including chunk header) if not specified;
* we want to keep this in sync with the one defined in
* sun.net.www.http.ChunkedOutputStream
*/
/**
* This method is used to enable streaming of a HTTP request body
* without internal buffering, when the content length is <b>not</b>
* known in advance. In this mode, chunked transfer encoding
* is used to send the request body. Note, not all HTTP servers
* support this mode.
* <p>
* When output streaming is enabled, authentication
* and redirection cannot be handled automatically.
* A HttpRetryException will be thrown when reading
* the response if authentication or redirection are required.
* This exception can be queried for the details of the error.
* <p>
* This method must be called before the URLConnection is connected.
*
* @param chunklen The number of bytes to write in each chunk.
* If chunklen is less than or equal to zero, a default
* value will be used.
*
* @throws IllegalStateException if URLConnection is already connected
* or if a different streaming mode is already enabled.
*
* @see #setFixedLengthStreamingMode(int)
* @since 1.5
*/
if (connected) {
throw new IllegalStateException ("Can't set streaming mode: already connected");
}
throw new IllegalStateException ("Fixed length streaming mode set");
}
}
/**
* Returns the value for the <code>n</code><sup>th</sup> header field.
* Some implementations may treat the <code>0</code><sup>th</sup>
* header field as special, i.e. as the status line returned by the HTTP
* server.
* <p>
* This method can be used in conjunction with the
* {@link #getHeaderFieldKey getHeaderFieldKey} method to iterate through all
* the headers in the message.
*
* @param n an index, where n>=0.
* @return the value of the <code>n</code><sup>th</sup> header field,
* or <code>null</code> if the value does not exist.
* @see java.net.HttpURLConnection#getHeaderFieldKey(int)
*/
return null;
}
/**
* An <code>int</code> representing the three digit HTTP Status-Code.
* <ul>
* <li> 1xx: Informational
* <li> 2xx: Success
* <li> 3xx: Redirection
* <li> 4xx: Client Error
* <li> 5xx: Server Error
* </ul>
*/
/**
* The HTTP response message.
*/
/* static variables */
/* do we automatically follow redirects? The default is true. */
private static boolean followRedirects = true;
/**
* If <code>true</code>, the protocol will automatically follow redirects.
* If <code>false</code>, the protocol will not automatically follow
* redirects.
* <p>
* This field is set by the <code>setInstanceFollowRedirects</code>
* method. Its value is returned by the <code>getInstanceFollowRedirects</code>
* method.
* <p>
* Its default value is based on the value of the static followRedirects
* at HttpURLConnection construction time.
*
* @see java.net.HttpURLConnection#setInstanceFollowRedirects(boolean)
* @see java.net.HttpURLConnection#getInstanceFollowRedirects()
* @see java.net.HttpURLConnection#setFollowRedirects(boolean)
*/
/* valid HTTP methods */
"GET", "POST", "HEAD", "OPTIONS", "PUT", "DELETE", "TRACE"
};
/**
* Constructor for the HttpURLConnection.
* @param u the URL
*/
super(u);
}
/**
* Sets whether HTTP redirects (requests with response code 3xx) should
* be automatically followed by this class. True by default. Applets
* cannot change this variable.
* <p>
* If there is a security manager, this method first calls
* the security manager's <code>checkSetFactory</code> method
* to ensure the operation is allowed.
* This could result in a SecurityException.
*
* @param set a <code>boolean</code> indicating whether or not
* to follow HTTP redirects.
* @exception SecurityException if a security manager exists and its
* <code>checkSetFactory</code> method doesn't
* allow the operation.
* @see SecurityManager#checkSetFactory
* @see #getFollowRedirects()
*/
// seems to be the best check here...
}
}
/**
* Returns a <code>boolean</code> indicating
* whether or not HTTP redirects (3xx) should
* be automatically followed.
*
* @return <code>true</code> if HTTP redirects should
* be automatically followed, <tt>false</tt> if not.
* @see #setFollowRedirects(boolean)
*/
public static boolean getFollowRedirects() {
return followRedirects;
}
/**
* Sets whether HTTP redirects (requests with response code 3xx) should
* be automatically followed by this <code>HttpURLConnection</code>
* instance.
* <p>
* The default value comes from followRedirects, which defaults to
* true.
*
* @param followRedirects a <code>boolean</code> indicating
* whether or not to follow HTTP redirects.
*
* @see java.net.HttpURLConnection#instanceFollowRedirects
* @see #getInstanceFollowRedirects
* @since 1.3
*/
}
/**
* Returns the value of this <code>HttpURLConnection</code>'s
* <code>instanceFollowRedirects</code> field.
*
* @return the value of this <code>HttpURLConnection</code>'s
* <code>instanceFollowRedirects</code> field.
* @see java.net.HttpURLConnection#instanceFollowRedirects
* @see #setInstanceFollowRedirects(boolean)
* @since 1.3
*/
public boolean getInstanceFollowRedirects() {
return instanceFollowRedirects;
}
/**
* Set the method for the URL request, one of:
* <UL>
* <LI>GET
* <LI>POST
* <LI>HEAD
* <LI>OPTIONS
* <LI>PUT
* <LI>DELETE
* <LI>TRACE
* </UL> are legal, subject to protocol restrictions. The default
* method is GET.
*
* @param method the HTTP method
* @exception ProtocolException if the method cannot be reset or if
* the requested method isn't valid for HTTP.
* @exception SecurityException if a security manager is set and the
* method is "TRACE", but the "allowHttpTrace"
* NetPermission is not granted.
* @see #getRequestMethod()
*/
if (connected) {
throw new ProtocolException("Can't reset method: already connected");
}
// This restriction will prevent people from using this class to
// experiment w/ new HTTP methods using java. But it should
// be placed for security - the request String could be
// arbitrarily long.
if (s != null) {
}
}
return;
}
}
}
/**
* Get the request method.
* @return the HTTP request method
* @see #setRequestMethod(java.lang.String)
*/
return method;
}
/**
* Gets the status code from an HTTP response message.
* For example, in the case of the following status lines:
* <PRE>
* HTTP/1.0 200 OK
* HTTP/1.0 401 Unauthorized
* </PRE>
* It will return 200 and 401 respectively.
* Returns -1 if no code can be discerned
* from the response (i.e., the response is not valid HTTP).
* @throws IOException if an error occurred connecting to the server.
* @return the HTTP Status-Code, or -1
*/
/*
* We're got the response code already
*/
if (responseCode != -1) {
return responseCode;
}
/*
* Ensure that we have connected to the server. Record
* exception as we need to re-throw it if there isn't
* a status line.
*/
try {
} catch (Exception e) {
exc = e;
}
/*
* If we can't a status-line then re-throw any exception
* that getInputStream threw.
*/
if (statusLine == null) {
if (exc instanceof RuntimeException)
throw (RuntimeException)exc;
else
throw (IOException)exc;
}
return -1;
}
/*
* Examine the status-line - should be formatted as per
* section 6.1 of RFC 2616 :-
*
* Status-Line = HTTP-Version SP Status-Code SP Reason-Phrase
*
* If status line can't be parsed return -1.
*/
if (codePos > 0) {
}
// deviation from RFC 2616 - don't reject status line
// if SP Reason-Phrase is not included.
if (phrasePos < 0)
try {
return responseCode;
} catch (NumberFormatException e) { }
}
}
return -1;
}
/**
* Gets the HTTP response message, if any, returned along with the
* response code from a server. From responses like:
* <PRE>
* HTTP/1.0 200 OK
* HTTP/1.0 404 Not Found
* </PRE>
* Extracts the Strings "OK" and "Not Found" respectively.
* Returns null if none could be discerned from the responses
* (the result was not valid HTTP).
* @throws IOException if an error occurred connecting to the server.
* @return the HTTP response message, or <code>null</code>
*/
return responseMessage;
}
try {
}
} catch (Exception e) {
}
return Default;
}
/**
* Indicates that other requests to the server
* are unlikely in the near future. Calling disconnect()
* should not imply that this HttpURLConnection
* instance can be reused for other requests.
*/
public abstract void disconnect();
/**
* Indicates if the connection is going through a proxy.
* @return a boolean indicating if the connection is
* using a proxy.
*/
public abstract boolean usingProxy();
/**
* Returns a {@link SocketPermission} object representing the
* permission necessary to connect to the destination host and port.
*
* @exception IOException if an error occurs while computing
* the permission.
*
* @return a <code>SocketPermission</code> object representing the
* permission necessary to connect to the destination
* host and port.
*/
return permission;
}
/**
* Returns the error stream if the connection failed
* but the server sent useful data nonetheless. The
* typical example is when an HTTP server responds
* with a 404, which will cause a FileNotFoundException
* to be thrown in connect, but the server sent an HTML
* help page with suggestions as to what to do.
*
* <p>This method will not cause a connection to be initiated. If
* the connection was not connected, or if the server did not have
* an error while connecting or if the server had an error but
* no error data was sent, this method will return null. This is
* the default.
*
* @return an error stream if any, null if there have been no
* errors, the connection is not connected or the server sent no
* useful data.
*/
return null;
}
/**
* The response codes for HTTP, as of version 1.1.
*/
// REMIND: do we want all these??
// Others not here that we do want??
/* 2XX: generally "OK" */
/**
* HTTP Status-Code 200: OK.
*/
/**
* HTTP Status-Code 201: Created.
*/
/**
* HTTP Status-Code 202: Accepted.
*/
/**
* HTTP Status-Code 203: Non-Authoritative Information.
*/
/**
* HTTP Status-Code 204: No Content.
*/
/**
* HTTP Status-Code 205: Reset Content.
*/
/**
* HTTP Status-Code 206: Partial Content.
*/
/* 3XX: relocation/redirect */
/**
* HTTP Status-Code 300: Multiple Choices.
*/
/**
* HTTP Status-Code 301: Moved Permanently.
*/
/**
* HTTP Status-Code 302: Temporary Redirect.
*/
/**
* HTTP Status-Code 303: See Other.
*/
/**
* HTTP Status-Code 304: Not Modified.
*/
/**
* HTTP Status-Code 305: Use Proxy.
*/
/* 4XX: client error */
/**
* HTTP Status-Code 400: Bad Request.
*/
/**
* HTTP Status-Code 401: Unauthorized.
*/
/**
* HTTP Status-Code 402: Payment Required.
*/
/**
* HTTP Status-Code 403: Forbidden.
*/
/**
* HTTP Status-Code 404: Not Found.
*/
/**
* HTTP Status-Code 405: Method Not Allowed.
*/
/**
* HTTP Status-Code 406: Not Acceptable.
*/
/**
* HTTP Status-Code 407: Proxy Authentication Required.
*/
/**
* HTTP Status-Code 408: Request Time-Out.
*/
/**
* HTTP Status-Code 409: Conflict.
*/
/**
* HTTP Status-Code 410: Gone.
*/
/**
* HTTP Status-Code 411: Length Required.
*/
/**
* HTTP Status-Code 412: Precondition Failed.
*/
/**
* HTTP Status-Code 413: Request Entity Too Large.
*/
/**
* HTTP Status-Code 414: Request-URI Too Large.
*/
/**
* HTTP Status-Code 415: Unsupported Media Type.
*/
/* 5XX: server error */
/**
* HTTP Status-Code 500: Internal Server Error.
* @deprecated it is misplaced and shouldn't have existed.
*/
/**
* HTTP Status-Code 500: Internal Server Error.
*/
/**
* HTTP Status-Code 501: Not Implemented.
*/
/**
* HTTP Status-Code 502: Bad Gateway.
*/
/**
* HTTP Status-Code 503: Service Unavailable.
*/
/**
* HTTP Status-Code 504: Gateway Timeout.
*/
/**
* HTTP Status-Code 505: HTTP Version Not Supported.
*/
}