Index: src/fuse/udcFuse/udcFuse.c
===================================================================
RCS file: /projects/compbio/cvsroot/kent/src/fuse/udcFuse/udcFuse.c,v
retrieving revision 1.5
retrieving revision 1.6
diff -b -B -U 4 -r1.5 -r1.6
--- src/fuse/udcFuse/udcFuse.c	19 Nov 2009 19:07:58 -0000	1.5
+++ src/fuse/udcFuse/udcFuse.c	20 Nov 2009 17:56:35 -0000	1.6
@@ -132,18 +132,49 @@
     }
 return 0;
 }
 
+#define HTTP_PATH_PREFIX "/http/"
+#define QENCODED_AT_SIGN "Q40"
+
+static int fusePathToUdcPath(const char *path, char *udcPath, size_t udcPathSize)
+/* The udc cache path is almost always just udcDefaultDir() + fuse path,
+ * except when the fuse path includes qEncoded http auth info -- necessary for 
+ * reconstructing the URL, but not included in the udc cache path. 
+ * Return -1 for problem, 0 for OK. */
+{
+char *httpHost = NULL;
+if (startsWith(HTTP_PATH_PREFIX, path))
+    httpHost = (char *)path + strlen(HTTP_PATH_PREFIX);
+if (httpHost)
+    {
+    char *atSign = strstr(httpHost, QENCODED_AT_SIGN);
+    char *nextSlash = strchr(httpHost, '/');
+    if (atSign != NULL &&
+	(nextSlash == NULL || atSign < nextSlash))
+	{
+	ERR_CATCH_START();
+	safef(udcPath, udcPathSize, "%s" HTTP_PATH_PREFIX "%s",
+	      udcDefaultDir(), atSign+strlen(QENCODED_AT_SIGN));
+	ERR_CATCH_END("safef udcPath (skipping auth)");
+	return 0;
+	}
+    }
+ERR_CATCH_START();
+safef(udcPath, udcPathSize, "%s%s", udcDefaultDir(), path);
+ERR_CATCH_END("safef udcPath");
+return 0;
+}
+
 static int udcfs_getattr(const char *path, struct stat *stbuf)
 /* According to http://sourceforge.net/apps/mediawiki/fuse/index.php?title=FuseInvariants ,
  * getattr() is called to test existence before every other command except read, write and
  * getattr itself.  Give stat of corresponding udc cache file (but make it read-only). */
 {
 unsigned int pid = pthread_self();
 char udcCachePath[4096];
-ERR_CATCH_START();
-safef(udcCachePath, sizeof(udcCachePath), "%s%s", udcDefaultDir(), path);
-ERR_CATCH_END("getattr safef udcCachePath");
+if (fusePathToUdcPath(path, udcCachePath, sizeof(udcCachePath)) < 0)
+    return -1;
 int res = stat(udcCachePath, stbuf);
 if (res != 0)
     {
     fprintf(stderr, "...[%d] getattr: stat(%s) failed (%d): %s\n", pid, udcCachePath, res, strerror(errno));
@@ -160,13 +191,11 @@
 			 off_t offset, struct fuse_file_info *fi)
 /* Read the corresponding udc cache directory. */
 {
 unsigned int pid = pthread_self();
-char *udcCacheRoot = udcDefaultDir();
 char udcCachePath[4096];
-ERR_CATCH_START();
-safef(udcCachePath, sizeof(udcCachePath), "%s%s", udcCacheRoot, path);
-ERR_CATCH_END("readdir safef udcCachePath");
+if (fusePathToUdcPath(path, udcCachePath, sizeof(udcCachePath)) < 0)
+    return -1;
 DIR *dirHandle = opendir(udcCachePath);
 if (dirHandle == NULL)
     {
     fprintf(stderr, "...[%d] readdir: opendir(%s) failed!: %s\n",

