add libhttpd
diff --git a/src/libhttpd/redirected.c b/src/libhttpd/redirected.c
new file mode 100644
index 0000000..c241945
--- /dev/null
+++ b/src/libhttpd/redirected.c
@@ -0,0 +1,64 @@
+#include <u.h>
+#include <libc.h>
+#include <bin.h>
+#include <httpd.h>
+
+int
+hredirected(HConnect *c, char *how, char *uri)
+{
+ Hio *hout;
+ char *s, *ss, *host;
+ int n;
+
+ host = c->head.host;
+ if(strchr(uri, ':')){
+ host = "";
+ }else if(uri[0] != '/'){
+ s = strrchr(c->req.uri, '/');
+ if(s != nil)
+ *s = '\0';
+ ss = halloc(c, strlen(c->req.uri) + strlen(uri) + 2 + UTFmax);
+ sprint(ss, "%s/%s", c->req.uri, uri);
+ uri = ss;
+ if(s != nil)
+ *s = '/';
+ }
+
+ n = snprint(c->xferbuf, HBufSize,
+ "<head><title>Redirection</title></head>\r\n"
+ "<body><h1>Redirection</h1>\r\n"
+ "Your selection can be found <a href=\"%U\"> here</a>.<p></body>\r\n", uri);
+
+ hout = &c->hout;
+ hprint(hout, "%s %s\r\n", hversion, how);
+ hprint(hout, "Date: %D\r\n", time(nil));
+ hprint(hout, "Server: Plan9\r\n");
+ hprint(hout, "Content-type: text/html\r\n");
+ hprint(hout, "Content-Length: %d\r\n", n);
+ if(host == nil || host[0] == 0)
+ hprint(hout, "Location: %U\r\n", uri);
+ else
+ hprint(hout, "Location: http://%U%U\r\n", host, uri);
+ if(c->head.closeit)
+ hprint(hout, "Connection: close\r\n");
+ else if(!http11(c))
+ hprint(hout, "Connection: Keep-Alive\r\n");
+ hprint(hout, "\r\n");
+
+ if(strcmp(c->req.meth, "HEAD") != 0)
+ hwrite(hout, c->xferbuf, n);
+
+ if(c->replog){
+ if(host == nil || host[0] == 0)
+ c->replog(c, "Reply: %s\nRedirect: %U\n", how, uri);
+ else
+ c->replog(c, "Reply: %s\nRedirect: http://%U%U\n", how, host, uri);
+ }
+ return hflush(hout);
+}
+
+int
+hmoved(HConnect *c, char *uri)
+{
+ return hredirected(c, "301 Moved Permanently", uri);
+}
