Initial check in of Class HTTPUtils

git-svn-id: https://joinup.ec.europa.eu/svn/moa-idspss/trunk@213 d688527b-c9ab-4aba-bd8d-4036d912da1d

1 files changed, 63 insertions, 0 deletions

diff --git a/id.server/src/at/gv/egovernment/moa/id/util/HTTPUtils.java b/id.server/src/at/gv/egovernment/moa/id/util/HTTPUtils.java
new file mode 100644
index 000000000..270b0c968
--- /dev/null
+++ b/id.server/src/at/gv/egovernment/moa/id/util/HTTPUtils.java
@@ -0,0 +1,63 @@
+package at.gv.egovernment.moa.id.util;
+
+/**
+ * HTTP Utilities  
+ * 
+ * @author Rudolf Schamberger
+ * @version $Id$
+ */
+
+import java.io.BufferedInputStream;
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.Reader;
+import java.net.HttpURLConnection;
+import java.net.URL;
+
+import org.apache.regexp.RE;
+
+/**
+ * 
+ * @author Rudolf Schamberger
+ *
+ */
+public class HTTPUtils {
+
+  /**
+   * Utility used to obtainin correct encoded HTTP content.
+   * Reads a given Content adressed by HTTP-URL into String. 
+   * Content encoding is considered by using the Content-Type HTTP header charset value.
+   * @param URL HTTP URL to read from.
+   * @return String representation of content
+   * @throws IOException on data-reading problems
+   */
+  public static String readHttpURL(String URL) 
+    throws IOException {
+      
+    URL url = new URL(URL);
+    HttpURLConnection conn = (HttpURLConnection)url.openConnection();
+    conn.setRequestMethod("GET");
+    String contentType = conn.getContentType();
+    RE regExp = new RE("(;.*charset=)(\"*)(.*[^\"])");
+    boolean charsetSupplied = regExp.match(contentType);
+    String encoding = "ISO-8859-1"; 		//default HTTP encoding 
+    if (charsetSupplied) {
+      encoding = regExp.getParen(3);
+    }
+    //TODO RS TEST if this works on all platforms
+    InputStream instream = new BufferedInputStream(conn.getInputStream());
+    InputStreamReader isr = new InputStreamReader(instream, encoding);
+    Reader in = new BufferedReader(isr);
+    int ch;
+  	StringBuffer buffer = new StringBuffer();
+    while ((ch = in.read()) > -1) {
+  		buffer.append((char)ch);
+  	}     
+    in.close();
+    conn.disconnect();
+    return buffer.toString();
+  }
+
+}