727438a3a76e2d885d82d1dd095c644c7e574b05
jcasper
  Fri May 27 16:43:41 2016 -0700
Mustn't forget the comments and copyright/license info! refs #15312

diff --git src/hg/lib/sessionThumbnail.c src/hg/lib/sessionThumbnail.c
index 5828355..8d443a8 100644
--- src/hg/lib/sessionThumbnail.c
+++ src/hg/lib/sessionThumbnail.c
@@ -1,59 +1,58 @@
-/*
+/* sessionThumbnail - get the filename, filesystem path, and web URI
+ * for the thumbnail image associated with a session.
  *
- */
+ * Copyright (C) 2016 The Regents of the University of California 
+ * See README in this or parent directory for licensing information. */
 
 #include "common.h"
-//#include "cheapcgi.h"
-//#include "jksql.h"
 #include "dystring.h"
 #include "hash.h"
-//#include "pipeline.h"
 #include "hgConfig.h"
 
 
 char *sessionThumbnailFileName(char *userIdx, char *encSessionName,
                                char *firstUse)
 /* Return a pointer to a string containing the name of the thumbnail image that
  * would be associated with the given user and session name.  Result must be freed.
  * userIdx is a presumed unique ID suitable for being part of a filename.
  * encSessionName is the cgi-encoded session name, and firstUse is the
  * mysql-formatted time string for the session's creation date */
 {
 struct dyString *fileName = dyStringCreate("hgPS_%s_%u_%ld.png",
     userIdx, hashString(encSessionName), dateToSeconds(firstUse, "%Y-%m-%d %T"));
 return dyStringCannibalize(&fileName);
 }
 
 char *sessionThumbnailFilePath(char *userIdx, char *encSessionName,
                                char *firstUse)
 /* Returns NULL if the image directory for session thumbnails hasn't been
  * set in hg.conf.  Otherwise, returns the filename and path for the
  * thumbnail of the specified session */
 {
 char *imgDir = cfgOption("sessionThumbnail.imgDir");
 if (imgDir == NULL)
     return NULL;
 
 struct dyString *filePath = dyStringCreate("%s", imgDir);
 if (lastChar(imgDir) != '/')
     dyStringAppendC(filePath, '/');
 dyStringAppend(filePath, sessionThumbnailFileName(userIdx, encSessionName, firstUse));
 return dyStringCannibalize(&filePath);
 }
 
 char *sessionThumbnailFileUri(char *userIdx, char *encSessionName,
                               char *firstUse)
 /* Returns NULL if the web path to session thumbnails hasn't been
  * defined in hg.conf.  Otherwise, returns the path and filename for the
  * thumbnail of the specified session */
 {
 char *pathBase = cfgOption("sessionThumbnail.webPath");
 if (pathBase == NULL)
     return NULL;
 
 struct dyString *fileUri = dyStringCreate("%s", pathBase);
 if (lastChar(pathBase) != '/')
     dyStringAppendC(fileUri, '/');
 dyStringAppend(fileUri, sessionThumbnailFileName(userIdx, encSessionName, firstUse));
 return dyStringCannibalize(&fileUri);
 }