Added a responder to serve static content from the classloader.

[jsvc.git] / src / dolda / jsvc / util / StaticContent.java

diff --git a/src/dolda/jsvc/util/StaticContent.java b/src/dolda/jsvc/util/StaticContent.java
new file mode 100644 (file)
index 0000000..0d4208e
--- /dev/null
+++ b/src/dolda/jsvc/util/StaticContent.java
@@ -0,0 +1,66 @@
+package dolda.jsvc.util;
+
+import dolda.jsvc.*;
+import java.io.*;
+import java.util.*;
+
+public class StaticContent implements Responder {
+    private final Class<?> base;
+    private final String resname;
+    private final boolean dir;
+    private final String mimetype;
+    
+    public StaticContent(Class<?> base, String resname, boolean dir, String mimetype) {
+       this.base = base;
+       this.resname = resname;
+       this.dir = dir;
+       this.mimetype = mimetype;
+    }
+    
+    public StaticContent(String resname, boolean dir, String mimetype) {
+       this(null, resname, dir, mimetype);
+    }
+    
+    public void respond(Request req) {
+       String nm;
+       if(dir) {
+           nm = resname + "/" + req.path();
+       } else {
+           nm = resname;
+       }
+       InputStream in;
+       if(base == null) {
+           in = StaticContent.class.getClassLoader().getResourceAsStream(nm);
+       } else {
+           in = base.getResourceAsStream(nm);
+       }
+       if(in == null)
+           throw(Restarts.stdresponse(404));
+       String ims = req.inheaders().get("If-Modified-Since");
+       Date mtime = new Date((req.ctx().starttime() / 1000) * 1000);
+       if(ims != null) {
+           Date d;
+           try {
+               d = Http.parsedate(ims);
+           } catch(java.text.ParseException e) {
+               throw(Restarts.stdresponse(400));
+           }
+           if(mtime.compareTo(d) <= 0) {
+               req.status(304);
+               req.outheaders().put("Content-Length", "0");
+               return;
+           }
+       }
+       try {
+           try {
+               req.outheaders().put("Content-Type", mimetype);
+               req.outheaders().put("Last-Modified", Http.fmtdate(mtime));
+               Misc.cpstream(in, req.output());
+           } finally {
+               in.close();
+           }
+       } catch(IOException e) {
+           throw(new Error(e));
+       }
+    }
+}