[Yanel-commits] rev 29460 - public/yanel/trunk/src/core/java/org/wyona/yanel/core/source

[michi at wyona.com]

Author: michi
Date: 2007-12-02 23:41:58 +0100 (Sun, 02 Dec 2007)
New Revision: 29460

Added:
   public/yanel/trunk/src/core/java/org/wyona/yanel/core/source/HttpResolver.java
Log:
HTTP resolver added

Added: public/yanel/trunk/src/core/java/org/wyona/yanel/core/source/HttpResolver.java
===================================================================
--- public/yanel/trunk/src/core/java/org/wyona/yanel/core/source/HttpResolver.java	                        (rev 0)
+++ public/yanel/trunk/src/core/java/org/wyona/yanel/core/source/HttpResolver.java	2007-12-02 22:41:58 UTC (rev 29460)
@@ -0,0 +1,56 @@
+package org.wyona.yanel.core.source;
+
+import java.io.InputStream;
+
+import javax.xml.transform.Source;
+import javax.xml.transform.URIResolver;
+import javax.xml.transform.stream.StreamSource;
+
+import org.apache.log4j.Category;
+import org.wyona.yanel.core.Resource;
+import org.wyona.yanel.core.Yanel;
+import org.wyona.yanel.core.map.Realm;
+import org.wyona.yarep.core.Repository;
+
+
+/**
+ * Resolves URIs with scheme "http".
+ * 
+ * Syntax:
+ * http:{path}
+ * 
+ * e.g.
+ * http://foo/bar.xml
+ * 
+ */
+public class HttpResolver implements URIResolver {
+
+    private static Category log = Category.getInstance(HttpResolver.class);
+
+    private static final String SCHEME = "http";
+    
+    private Resource resource;
+    
+    public HttpResolver(Resource resource) {
+        this.resource = resource;
+    }
+
+    public Source resolve(String href, String base) throws SourceException {
+        String prefix = SCHEME + ":";
+        
+        // only accept 'http:' URIs
+        if (href == null || !href.startsWith(prefix)){
+            return null;
+        }
+
+        try {
+            java.net.URL url = new java.net.URL(href);
+            log.error("DEBUG: Resolve: " + url.toString());
+            return new StreamSource(url.openConnection().getInputStream());
+        } catch (Exception e) {
+            String errorMsg = "Could not resolve URI: " + href + ": " + e.toString();
+            log.error(errorMsg, e);
+            throw new SourceException(errorMsg, e);
+        }
+    }
+}