Package nl.nikhef.jgridstart.osutils

Class ConnectionUtils

java.lang.Object

nl.nikhef.jgridstart.osutils.ConnectionUtils

public class ConnectionUtils
extends Object

Helper methods for reading (external) URLs

Constructor Summary

Constructors

Constructor	Description
ConnectionUtils()

Method Summary

Modifier and Type	Method	Description
protected static String	createQueryString(String[] data, boolean post)	Return a query string from arguments for pre or post
static String	pageContents(URL url)	Return the contents of a URL
static String	pageContents(URL url, String[] data, boolean post)	Return the contents of a URL with pre or post data
static String	pageContents(URL url, String data, boolean post)	Return the contents of a URL with pre or post data
static Reader	pageReader(URL url)	Return a Reader for a URL
static Reader	pageReader(URL url, String[] data, boolean post)	Return a reader for a URL with pre or post data
static Reader	pageReader(URL url, String data, boolean post)	Return a Reader for a URL with pre or post data
protected static URLConnection	URLopenConnection(URL url)	Open connection with workarounds.

Methods inherited from class java.lang.Object

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

Constructor Detail

ConnectionUtils

public ConnectionUtils()

Method Detail

pageReader

public static Reader pageReader(URL url)
                         throws IOException

Return a Reader for a URL

Throws:

IOException

pageContents

public static String pageContents(URL url)
                           throws IOException

Return the contents of a URL

Throws:

IOException

pageReader

public static Reader pageReader(URL url,
                                String[] data,
                                boolean post)
                         throws IOException

Return a reader for a URL with pre or post data

Parameters:

url - URL to submit to

data - Array of "key","value","key2","value2",...

post - true to post data, false for get

Returns:

reader for reading from the URL

Throws:

IOException

pageContents

public static String pageContents(URL url,
                                  String[] data,
                                  boolean post)
                           throws IOException

Return the contents of a URL with pre or post data

Parameters:

url - URL to submit to

data - Array of "key","value","key2","value2",...

post - true to post data, false for get

Returns:

reader for reading from the URL

Throws:

IOException

pageContents

public static String pageContents(URL url,
                                  String data,
                                  boolean post)
                           throws IOException

Return the contents of a URL with pre or post data

Parameters:

url - URL to submit to

data - String of "key=value&otherkey=othervalue" post data

post - true to post data, false for get

Returns:

data returned by server

Throws:

IOException

pageReader

public static Reader pageReader(URL url,
                                String data,
                                boolean post)
                         throws IOException

Return a Reader for a URL with pre or post data

Parameters:

url - URL to submit to

data - String of "{code key=value&otherkey=othervalue}" post data

post - true to post data, false for get

Returns:

data returned by server

Throws:

IOException

URLopenConnection

protected static URLConnection URLopenConnection(URL url)
                                          throws IOException

Open connection with workarounds.

Currently specifically sets user-agent because with Java Web Start the system property http.agent does not properly set the user-agent for connections.

See also Networking specifics under Java Web Start.

Throws:

IOException

createQueryString

protected static String createQueryString(String[] data,
                                          boolean post)
                                   throws UnsupportedEncodingException

Return a query string from arguments for pre or post

Parameters:

data - Array of "key=value" Strings

Returns:

single String with urlencoded data

Throws:

UnsupportedEncodingException