: Class HttpURLConnection

java.lang.Object
  |
  +--java.net.URLConnection
        |
        +--java.net.HttpURLConnection

public abstract class HttpURLConnection
extends URLConnection

A URLConnection with support for HTTP-specific features. See the spec for details.

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.

Since:: JDK1.1
See Also:: disconnect()

Field Summary

static int HTTP_ACCEPTED
copy-> HTTP_ACCEPTED

HTTP Status-Code 202: Accepted.

static int HTTP_BAD_GATEWAY
copy-> HTTP_BAD_GATEWAY

HTTP Status-Code 502: Bad Gateway.

static int HTTP_BAD_METHOD
copy-> HTTP_BAD_METHOD

HTTP Status-Code 405: Method Not Allowed.

static int HTTP_BAD_REQUEST
copy-> HTTP_BAD_REQUEST

HTTP Status-Code 400: Bad Request.

static int HTTP_CLIENT_TIMEOUT
copy-> HTTP_CLIENT_TIMEOUT

HTTP Status-Code 408: Request Time-Out.

static int HTTP_CONFLICT
copy-> HTTP_CONFLICT

HTTP Status-Code 409: Conflict.

static int HTTP_CREATED
copy-> HTTP_CREATED

HTTP Status-Code 201: Created.

static int HTTP_ENTITY_TOO_LARGE
copy-> HTTP_ENTITY_TOO_LARGE

HTTP Status-Code 413: Request Entity Too Large.

static int HTTP_FORBIDDEN
copy-> HTTP_FORBIDDEN

HTTP Status-Code 403: Forbidden.

static int HTTP_GATEWAY_TIMEOUT
copy-> HTTP_GATEWAY_TIMEOUT

HTTP Status-Code 504: Gateway Timeout.

static int HTTP_GONE
copy-> HTTP_GONE

HTTP Status-Code 410: Gone.

static int HTTP_INTERNAL_ERROR
copy-> HTTP_INTERNAL_ERROR

HTTP Status-Code 500: Internal Server Error.

static int HTTP_LENGTH_REQUIRED
copy-> HTTP_LENGTH_REQUIRED

HTTP Status-Code 411: Length Required.

static int HTTP_MOVED_PERM
copy-> HTTP_MOVED_PERM

HTTP Status-Code 301: Moved Permanently.

static int HTTP_MOVED_TEMP
copy-> HTTP_MOVED_TEMP

HTTP Status-Code 302: Temporary Redirect.

static int HTTP_MULT_CHOICE
copy-> HTTP_MULT_CHOICE

HTTP Status-Code 300: Multiple Choices.

static int HTTP_NO_CONTENT
copy-> HTTP_NO_CONTENT

HTTP Status-Code 204: No Content.

static int HTTP_NOT_ACCEPTABLE
copy-> HTTP_NOT_ACCEPTABLE

HTTP Status-Code 406: Not Acceptable.

static int HTTP_NOT_AUTHORITATIVE
copy-> HTTP_NOT_AUTHORITATIVE

HTTP Status-Code 203: Non-Authoritative Information.

static int HTTP_NOT_FOUND
copy-> HTTP_NOT_FOUND

HTTP Status-Code 404: Not Found.

static int HTTP_NOT_IMPLEMENTED
copy-> HTTP_NOT_IMPLEMENTED

HTTP Status-Code 501: Not Implemented.

static int HTTP_NOT_MODIFIED
copy-> HTTP_NOT_MODIFIED

HTTP Status-Code 304: Not Modified.

static int HTTP_OK
copy-> HTTP_OK

HTTP Status-Code 200: OK.

static int HTTP_PARTIAL
copy-> HTTP_PARTIAL

HTTP Status-Code 206: Partial Content.

static int HTTP_PAYMENT_REQUIRED
copy-> HTTP_PAYMENT_REQUIRED

HTTP Status-Code 402: Payment Required.

static int HTTP_PRECON_FAILED
copy-> HTTP_PRECON_FAILED

HTTP Status-Code 412: Precondition Failed.

static int HTTP_PROXY_AUTH
copy-> HTTP_PROXY_AUTH

HTTP Status-Code 407: Proxy Authentication Required.

static int HTTP_REQ_TOO_LONG
copy-> HTTP_REQ_TOO_LONG

HTTP Status-Code 414: Request-URI Too Large.

static int HTTP_RESET
copy-> HTTP_RESET

HTTP Status-Code 205: Reset Content.

static int HTTP_SEE_OTHER
copy-> HTTP_SEE_OTHER

HTTP Status-Code 303: See Other.

static int HTTP_SERVER_ERROR
copy-> HTTP_SERVER_ERROR

Deprecated. it is misplaced and shouldn't have existed.

static int HTTP_UNAUTHORIZED
copy-> HTTP_UNAUTHORIZED

HTTP Status-Code 401: Unauthorized.

static int HTTP_UNAVAILABLE
copy-> HTTP_UNAVAILABLE

HTTP Status-Code 503: Service Unavailable.

static int HTTP_UNSUPPORTED_TYPE
copy-> HTTP_UNSUPPORTED_TYPE

HTTP Status-Code 415: Unsupported Media Type.

static int HTTP_USE_PROXY
copy-> HTTP_USE_PROXY

HTTP Status-Code 305: Use Proxy.

static int HTTP_VERSION
copy-> HTTP_VERSION

HTTP Status-Code 505: HTTP Version Not Supported.

protected boolean instanceFollowRedirects
copy-> instanceFollowRedirects

If true, the protocol will automatically follow redirects. If false, the protocol will not automatically follow redirects.
This field is set by the setInstanceFollowRedirects method. Its value is returned by the getInstanceFollowRedirects method.
Its default value is based on the value of the static followRedirects at HttpURLConnection construction time.

See Also:
setInstanceFollowRedirects(boolean), getInstanceFollowRedirects(), setFollowRedirects(boolean)

protected String method
copy-> method

The HTTP method (GET,POST,PUT,etc.).

protected int responseCode
copy-> responseCode

An int representing the three digit HTTP Status-Code.

1xx: Informational
2xx: Success
3xx: Redirection
4xx: Client Error
5xx: Server Error

protected String responseMessage
copy-> responseMessage

The HTTP response message.

Fields inherited from class java.net.URLConnection

allowUserInteraction, connected, doInput, doOutput, ifModifiedSince, url, useCaches

Constructor Summary

protected HttpURLConnection
copy-> new HttpURLConnection( )
copy-> <HttpURLConnection var> = new HttpURLConnection(<URL u>);

Constructor for the URLStreamHandler.

Parameters:
u - the URL

Method Summary

abstract void disconnect()
copy-> .disconnect()
copy-> <HttpURLConnection>.disconnect();

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.

InputStream getErrorStream()
copy-> .getErrorStream()
copy-> <InputStream var>=<HttpURLConnection>.getErrorStream();

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.
This method will not cause a connection to be initiated. If there the connection was not connected, or if the server did not have an error while connecting or if the server did have an error but there no error data was sent, this method will return null. This is the default.

Returns:
an error stream if any, null if there have been no errors, the connection is not connected or the server sent no useful data.

static boolean getFollowRedirects()
copy-> HttpURLConnection.getFollowRedirects()
copy-> <boolean var>=HttpURLConnection.getFollowRedirects();

Returns a boolean indicating whether or not HTTP redirects (3xx) should be automatically followed.

Returns:
true if HTTP redirects should be automatically followed, false if not.
See Also:
setFollowRedirects(boolean)

long getHeaderFieldDate(String name, long Default)
copy-> .getHeaderFieldDate(, )
copy-> <long var>=<HttpURLConnection>.getHeaderFieldDate(<String name>, <long Default>);

Returns the value of the named field parsed as date. The result is the number of milliseconds since January 1, 1970 GMT represented by the named field.
This form of getHeaderField exists because some connection types (e.g., http-ng) have pre-parsed headers. Classes for that connection type can override this method and short-circuit the parsing.

Overrides:
getHeaderFieldDate in class URLConnection

Following copied from class: java.net.URLConnection

Parameters:
name - the name of the header field.
Default - a default value.
Returns:
the value of the field, parsed as a date. The value of the Default argument is returned if the field is missing or malformed.

boolean getInstanceFollowRedirects()
copy-> .getInstanceFollowRedirects()
copy-> <boolean var>=<HttpURLConnection>.getInstanceFollowRedirects();

Returns the value of this HttpURLConnection's instanceFollowRedirects field.

Returns:
the value of this HttpURLConnection's instanceFollowRedirects field.
See Also:
instanceFollowRedirects, setInstanceFollowRedirects(boolean)

Permission getPermission()
copy-> .getPermission()
copy-> <Permission var>=<HttpURLConnection>.getPermission();

Returns a permission object representing the permission necessary to make the connection represented by this object. This method returns null if no permission is required to make the connection. By default, this method returns java.security.AllPermission. Subclasses should override this method and return the permission that best represents the permission required to make a a connection to the URL. For example, a URLConnection representing a file: URL would return a java.io.FilePermission object.
The permission returned may dependent upon the state of the connection. For example, the permission before connecting may be different from that after connecting. For example, an HTTP sever, say foo.com, may redirect the connection to a different host, say bar.com. Before connecting the permission returned by the connection will represent the permission needed to connect to foo.com, while the permission returned after connecting will be to bar.com.
Permissions are generally used for two purposes: to protect caches of objects obtained through URLConnections, and to check the right of a recipient to learn about a particular URL. In the first case, the permission should be obtained after the object has been obtained. For example, in an HTTP connection, this will represent the permission to connect to the host from which the data was ultimately fetched. In the second case, the permission should be obtained and tested before connecting.

Overrides:
getPermission in class URLConnection

Following copied from class: java.net.URLConnection

Returns:
the permission object representing the permission necessary to make the connection represented by this URLConnection.
Throws:
IOException - if the computation of the permission requires network or file I/O and an exception occurs while computing it.

String getRequestMethod()
copy-> .getRequestMethod()
copy-> <String var>=<HttpURLConnection>.getRequestMethod();

Get the request method.

Returns:
the HTTP request method
See Also:
setRequestMethod(java.lang.String)

int getResponseCode()
copy-> .getResponseCode()
copy-> <int var>=<HttpURLConnection>.getResponseCode();

Gets HTTP response status from responses like:
HTTP/1.0 200 OK HTTP/1.0 401 Unauthorized
Extracts the ints 200 and 401 respectively. Returns -1 if none can be discerned from the response (i.e., the response is not valid HTTP).

Returns:
the HTTP Status-Code
Throws:
IOException - if an error occurred connecting to the server.

String getResponseMessage()
copy-> .getResponseMessage()
copy-> <String var>=<HttpURLConnection>.getResponseMessage();

Gets the HTTP response message, if any, returned along with the response code from a server. From responses like:
HTTP/1.0 200 OK HTTP/1.0 404 Not Found
Extracts the Strings "OK" and "Not Found" respectively. Returns null if none could be discerned from the responses (the result was not valid HTTP).

Returns:
the HTTP response message, or null
Throws:
IOException - if an error occurred connecting to the server.

static void setFollowRedirects(boolean set)
copy-> HttpURLConnection.setFollowRedirects( )
copy-> HttpURLConnection.setFollowRedirects(<boolean set>);

Sets whether HTTP redirects (requests with response code 3xx) should be automatically followed by this class. True by default. Applets cannot change this variable.
If there is a security manager, this method first calls the security manager's checkSetFactory method to ensure the operation is allowed. This could result in a SecurityException.

Parameters:
set - a boolean indicating whether or not to follow HTTP redirects.
Throws:
SecurityException - if a security manager exists and its checkSetFactory method doesn't allow the operation.
See Also:
SecurityManager.checkSetFactory(), getFollowRedirects()

void setInstanceFollowRedirects(boolean followRedirects)
copy-> .setInstanceFollowRedirects( )
copy-> <HttpURLConnection>.setInstanceFollowRedirects(<boolean followRedirects>);

Sets whether HTTP redirects (requests with response code 3xx) should be automatically followed by this HttpURLConnection instance.
The default value comes from followRedirects, which defaults to true.

Parameters:
followRedirects - a boolean indicating whether or not to follow HTTP redirects.
See Also:
instanceFollowRedirects, getInstanceFollowRedirects()

void setRequestMethod(String method)
copy-> .setRequestMethod( )
copy-> <HttpURLConnection>.setRequestMethod(<String method>);

Set the method for the URL request, one of:

GET
POST
HEAD
OPTIONS
PUT
DELETE
TRACE
are legal, subject to protocol restrictions. The default method is GET.

Parameters:
method - the HTTP method
Throws:
ProtocolException - if the method cannot be reset or if the requested method isn't valid for HTTP.
See Also:
getRequestMethod()

abstract boolean usingProxy()
copy-> .usingProxy()
copy-> <boolean var>=<HttpURLConnection>.usingProxy();

Indicates if the connection is going through a proxy.

Returns:
a boolean indicating if the connection is using a proxy.

Methods inherited from class java.net.URLConnection

connect, getAllowUserInteraction, getContent, getContent, getContentEncoding, getContentLength, getContentType, getDate, getDefaultAllowUserInteraction, getDefaultRequestProperty, getDefaultUseCaches, getDoInput, getDoOutput, getExpiration, getFileNameMap, getHeaderField, getHeaderField, getHeaderFieldInt, getHeaderFieldKey, getIfModifiedSince, getInputStream, getLastModified, getOutputStream, getRequestProperty, getURL, getUseCaches, guessContentTypeFromName, guessContentTypeFromStream, setAllowUserInteraction, setContentHandlerFactory, setDefaultAllowUserInteraction, setDefaultRequestProperty, setDefaultUseCaches, setDoInput, setDoOutput, setFileNameMap, setIfModifiedSince, setRequestProperty, setUseCaches, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

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Field Summary
`static int`	HTTP_ACCEPTED copy-> `HTTP_ACCEPTED` HTTP Status-Code 202: Accepted.
`static int`	HTTP_BAD_GATEWAY copy-> `HTTP_BAD_GATEWAY` HTTP Status-Code 502: Bad Gateway.
`static int`	HTTP_BAD_METHOD copy-> `HTTP_BAD_METHOD` HTTP Status-Code 405: Method Not Allowed.
`static int`	HTTP_BAD_REQUEST copy-> `HTTP_BAD_REQUEST` HTTP Status-Code 400: Bad Request.
`static int`	HTTP_CLIENT_TIMEOUT copy-> `HTTP_CLIENT_TIMEOUT` HTTP Status-Code 408: Request Time-Out.
`static int`	HTTP_CONFLICT copy-> `HTTP_CONFLICT` HTTP Status-Code 409: Conflict.
`static int`	HTTP_CREATED copy-> `HTTP_CREATED` HTTP Status-Code 201: Created.
`static int`	HTTP_ENTITY_TOO_LARGE copy-> `HTTP_ENTITY_TOO_LARGE` HTTP Status-Code 413: Request Entity Too Large.
`static int`	HTTP_FORBIDDEN copy-> `HTTP_FORBIDDEN` HTTP Status-Code 403: Forbidden.
`static int`	HTTP_GATEWAY_TIMEOUT copy-> `HTTP_GATEWAY_TIMEOUT` HTTP Status-Code 504: Gateway Timeout.
`static int`	HTTP_GONE copy-> `HTTP_GONE` HTTP Status-Code 410: Gone.
`static int`	HTTP_INTERNAL_ERROR copy-> `HTTP_INTERNAL_ERROR` HTTP Status-Code 500: Internal Server Error.
`static int`	HTTP_LENGTH_REQUIRED copy-> `HTTP_LENGTH_REQUIRED` HTTP Status-Code 411: Length Required.
`static int`	HTTP_MOVED_PERM copy-> `HTTP_MOVED_PERM` HTTP Status-Code 301: Moved Permanently.
`static int`	HTTP_MOVED_TEMP copy-> `HTTP_MOVED_TEMP` HTTP Status-Code 302: Temporary Redirect.
`static int`	HTTP_MULT_CHOICE copy-> `HTTP_MULT_CHOICE` HTTP Status-Code 300: Multiple Choices.
`static int`	HTTP_NO_CONTENT copy-> `HTTP_NO_CONTENT` HTTP Status-Code 204: No Content.
`static int`	HTTP_NOT_ACCEPTABLE copy-> `HTTP_NOT_ACCEPTABLE` HTTP Status-Code 406: Not Acceptable.
`static int`	HTTP_NOT_AUTHORITATIVE copy-> `HTTP_NOT_AUTHORITATIVE` HTTP Status-Code 203: Non-Authoritative Information.
`static int`	HTTP_NOT_FOUND copy-> `HTTP_NOT_FOUND` HTTP Status-Code 404: Not Found.
`static int`	HTTP_NOT_IMPLEMENTED copy-> `HTTP_NOT_IMPLEMENTED` HTTP Status-Code 501: Not Implemented.
`static int`	HTTP_NOT_MODIFIED copy-> `HTTP_NOT_MODIFIED` HTTP Status-Code 304: Not Modified.
`static int`	HTTP_OK copy-> `HTTP_OK` HTTP Status-Code 200: OK.
`static int`	HTTP_PARTIAL copy-> `HTTP_PARTIAL` HTTP Status-Code 206: Partial Content.
`static int`	HTTP_PAYMENT_REQUIRED copy-> `HTTP_PAYMENT_REQUIRED` HTTP Status-Code 402: Payment Required.
`static int`	HTTP_PRECON_FAILED copy-> `HTTP_PRECON_FAILED` HTTP Status-Code 412: Precondition Failed.
`static int`	HTTP_PROXY_AUTH copy-> `HTTP_PROXY_AUTH` HTTP Status-Code 407: Proxy Authentication Required.
`static int`	HTTP_REQ_TOO_LONG copy-> `HTTP_REQ_TOO_LONG` HTTP Status-Code 414: Request-URI Too Large.
`static int`	HTTP_RESET copy-> `HTTP_RESET` HTTP Status-Code 205: Reset Content.
`static int`	HTTP_SEE_OTHER copy-> `HTTP_SEE_OTHER` HTTP Status-Code 303: See Other.
`static int`	HTTP_SERVER_ERROR copy-> `HTTP_SERVER_ERROR` Deprecated. it is misplaced and shouldn't have existed.
`static int`	HTTP_UNAUTHORIZED copy-> `HTTP_UNAUTHORIZED` HTTP Status-Code 401: Unauthorized.
`static int`	HTTP_UNAVAILABLE copy-> `HTTP_UNAVAILABLE` HTTP Status-Code 503: Service Unavailable.
`static int`	HTTP_UNSUPPORTED_TYPE copy-> `HTTP_UNSUPPORTED_TYPE` HTTP Status-Code 415: Unsupported Media Type.
`static int`	HTTP_USE_PROXY copy-> `HTTP_USE_PROXY` HTTP Status-Code 305: Use Proxy.
`static int`	HTTP_VERSION copy-> `HTTP_VERSION` HTTP Status-Code 505: HTTP Version Not Supported.
`protected boolean`	instanceFollowRedirects copy-> `instanceFollowRedirects` If `true`, the protocol will automatically follow redirects. If `false`, the protocol will not automatically follow redirects. This field is set by the `setInstanceFollowRedirects` method. Its value is returned by the `getInstanceFollowRedirects` method. Its default value is based on the value of the static followRedirects at HttpURLConnection construction time. See Also: `setInstanceFollowRedirects(boolean)`, `getInstanceFollowRedirects()`, `setFollowRedirects(boolean)`
`protected String`	method copy-> `method` The HTTP method (GET,POST,PUT,etc.).
`protected int`	responseCode copy-> `responseCode` An `int` representing the three digit HTTP Status-Code. 1xx: Informational 2xx: Success 3xx: Redirection 4xx: Client Error 5xx: Server Error
`protected String`	responseMessage copy-> `responseMessage` The HTTP response message.

Constructor Summary
`protected`	HttpURLConnection copy-> `new HttpURLConnection( )` copy-> `<HttpURLConnection var> = new HttpURLConnection(<URL u>);` Constructor for the URLStreamHandler. Parameters: `u` - the URL

Method Summary
`abstract void`	disconnect() copy-> `.disconnect()` copy-> `<HttpURLConnection>.disconnect();` 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.
`InputStream`	getErrorStream() copy-> `.getErrorStream()` copy-> `<InputStream var>=<HttpURLConnection>.getErrorStream();` 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. This method will not cause a connection to be initiated. If there the connection was not connected, or if the server did not have an error while connecting or if the server did have an error but there no error data was sent, this method will return null. This is the default. Returns: an error stream if any, null if there have been no errors, the connection is not connected or the server sent no useful data.
`static boolean`	getFollowRedirects() copy-> `HttpURLConnection.getFollowRedirects()` copy-> `<boolean var>=HttpURLConnection.getFollowRedirects();` Returns a `boolean` indicating whether or not HTTP redirects (3xx) should be automatically followed. Returns: `true` if HTTP redirects should be automatically followed, `false` if not. See Also: `setFollowRedirects(boolean)`
`long`	getHeaderFieldDate(String name, long Default) copy-> `.getHeaderFieldDate(, )` copy-> `<long var>=<HttpURLConnection>.getHeaderFieldDate(<String name>, <long Default>);` Returns the value of the named field parsed as date. The result is the number of milliseconds since January 1, 1970 GMT represented by the named field. This form of `getHeaderField` exists because some connection types (e.g., `http-ng`) have pre-parsed headers. Classes for that connection type can override this method and short-circuit the parsing. Overrides: `getHeaderFieldDate` in class `URLConnection` Following copied from class: `java.net.URLConnection` Parameters: `name` - the name of the header field. `Default` - a default value. Returns: the value of the field, parsed as a date. The value of the `Default` argument is returned if the field is missing or malformed.
`boolean`	getInstanceFollowRedirects() copy-> `.getInstanceFollowRedirects()` copy-> `<boolean var>=<HttpURLConnection>.getInstanceFollowRedirects();` Returns the value of this `HttpURLConnection`'s `instanceFollowRedirects` field. Returns: the value of this `HttpURLConnection`'s `instanceFollowRedirects` field. See Also: `instanceFollowRedirects`, `setInstanceFollowRedirects(boolean)`
`Permission`	getPermission() copy-> `.getPermission()` copy-> `<Permission var>=<HttpURLConnection>.getPermission();` Returns a permission object representing the permission necessary to make the connection represented by this object. This method returns null if no permission is required to make the connection. By default, this method returns `java.security.AllPermission`. Subclasses should override this method and return the permission that best represents the permission required to make a a connection to the URL. For example, a `URLConnection` representing a `file:` URL would return a `java.io.FilePermission` object. The permission returned may dependent upon the state of the connection. For example, the permission before connecting may be different from that after connecting. For example, an HTTP sever, say foo.com, may redirect the connection to a different host, say bar.com. Before connecting the permission returned by the connection will represent the permission needed to connect to foo.com, while the permission returned after connecting will be to bar.com. Permissions are generally used for two purposes: to protect caches of objects obtained through URLConnections, and to check the right of a recipient to learn about a particular URL. In the first case, the permission should be obtained after the object has been obtained. For example, in an HTTP connection, this will represent the permission to connect to the host from which the data was ultimately fetched. In the second case, the permission should be obtained and tested before connecting. Overrides: `getPermission` in class `URLConnection` Following copied from class: `java.net.URLConnection` Returns: the permission object representing the permission necessary to make the connection represented by this URLConnection. Throws: `IOException` - if the computation of the permission requires network or file I/O and an exception occurs while computing it.
`String`	getRequestMethod() copy-> `.getRequestMethod()` copy-> `<String var>=<HttpURLConnection>.getRequestMethod();` Get the request method. Returns: the HTTP request method See Also: `setRequestMethod(java.lang.String)`
`int`	getResponseCode() copy-> `.getResponseCode()` copy-> `<int var>=<HttpURLConnection>.getResponseCode();` Gets HTTP response status from responses like: HTTP/1.0 200 OK HTTP/1.0 401 Unauthorized Extracts the ints 200 and 401 respectively. Returns -1 if none can be discerned from the response (i.e., the response is not valid HTTP). Returns: the HTTP Status-Code Throws: `IOException` - if an error occurred connecting to the server.
`String`	getResponseMessage() copy-> `.getResponseMessage()` copy-> `<String var>=<HttpURLConnection>.getResponseMessage();` Gets the HTTP response message, if any, returned along with the response code from a server. From responses like: HTTP/1.0 200 OK HTTP/1.0 404 Not Found Extracts the Strings "OK" and "Not Found" respectively. Returns null if none could be discerned from the responses (the result was not valid HTTP). Returns: the HTTP response message, or `null` Throws: `IOException` - if an error occurred connecting to the server.
`static void`	setFollowRedirects(boolean set) copy-> `HttpURLConnection.setFollowRedirects( )` copy-> `HttpURLConnection.setFollowRedirects(<boolean set>);` Sets whether HTTP redirects (requests with response code 3xx) should be automatically followed by this class. True by default. Applets cannot change this variable. If there is a security manager, this method first calls the security manager's `checkSetFactory` method to ensure the operation is allowed. This could result in a SecurityException. Parameters: `set` - a `boolean` indicating whether or not to follow HTTP redirects. Throws: `SecurityException` - if a security manager exists and its `checkSetFactory` method doesn't allow the operation. See Also: `SecurityManager.checkSetFactory()`, `getFollowRedirects()`
`void`	setInstanceFollowRedirects(boolean followRedirects) copy-> `.setInstanceFollowRedirects( )` copy-> `<HttpURLConnection>.setInstanceFollowRedirects(<boolean followRedirects>);` Sets whether HTTP redirects (requests with response code 3xx) should be automatically followed by this `HttpURLConnection` instance. The default value comes from followRedirects, which defaults to true. Parameters: `followRedirects` - a `boolean` indicating whether or not to follow HTTP redirects. See Also: `instanceFollowRedirects`, `getInstanceFollowRedirects()`
`void`	setRequestMethod(String method) copy-> `.setRequestMethod( )` copy-> `<HttpURLConnection>.setRequestMethod(<String method>);` Set the method for the URL request, one of: GET POST HEAD OPTIONS PUT DELETE TRACE are legal, subject to protocol restrictions. The default method is GET. Parameters: `method` - the HTTP method Throws: `ProtocolException` - if the method cannot be reset or if the requested method isn't valid for HTTP. See Also: `getRequestMethod()`
`abstract boolean`	usingProxy() copy-> `.usingProxy()` copy-> `<boolean var>=<HttpURLConnection>.usingProxy();` Indicates if the connection is going through a proxy. Returns: a boolean indicating if the connection is using a proxy.

java.net Class HttpURLConnection

java.net
Class HttpURLConnection