046c975630f6576722e8cbfa843e68f6068d854e
hiram
  Thu Mar 21 15:06:42 2019 -0700
somewhat better for sample data URLs refs #18869

diff --git src/hg/hubApi/dataApi.h src/hg/hubApi/dataApi.h
index 3f7f837..523797f 100644
--- src/hg/hubApi/dataApi.h
+++ src/hg/hubApi/dataApi.h
@@ -1,78 +1,81 @@
 /* dataApi.h - functions for API access to UCSC data resources */
 
 #ifndef DATAAPH_H
 
 #include "common.h"
 #include "linefile.h"
 #include "hash.h"
 #include "options.h"
 #include "jksql.h"
 #include "htmshell.h"
 #include "web.h"
 #include "cheapcgi.h"
 #include "cart.h"
 #include "hui.h"
 #include "udc.h"
 #include "knetUdc.h"
 #include "genbank.h"
 #include "trackHub.h"
 #include "hgConfig.h"
 #include "hCommon.h"
 #include "hPrint.h"
 #include "bigWig.h"
 #include "hubConnect.h"
 #include "obscure.h"
 #include "errCatch.h"
 #include "vcf.h"
 #include "bedTabix.h"
 #include "bamFile.h"
 #include "jsonParse.h"
 #include "jsonWrite.h"
 #include "chromInfo.h"
 #include "wiggle.h"
 #include "hubPublic.h"
 
 #ifdef USE_HAL
 #include "halBlockViz.h"
 #endif
 
 #define MAX_PATH_INFO 32
 
+/* limit amount of output to a maximum to avoid overload */
+extern int maxItemsOutput;	/* can be set in URL maxItemsOutput=N */
+
 /*  functions in hubApi.c */
 struct hubPublic *hubPublicDbLoadAll();
 
 struct dbDb *ucscDbDb();
 /* return the dbDb table as an slList */
 
 /*  functions in apiUtils.c */
 void apiErrAbort(char *format, ...);
 /* Issue an error message in json format, and exit(0) */
 
 struct jsonWrite *apiStartOutput();
 /* begin json output with standard header information for all requests */
 
 int tableColumns(struct sqlConnection *conn, struct jsonWrite *jw, char *table,
    char ***nameReturn, char ***typeReturn);
 /* return the column names, and their MySQL data type, for the given table
  *  return number of columns (aka 'fields')
  */
 
 struct trackHub *errCatchTrackHubOpen(char *hubUrl);
 /* use errCatch around a trackHub open in case it fails */
 
 struct trackDb *obtainTdb(struct trackHubGenome *genome, char *db);
 /* return a full trackDb fiven the hub genome pointer, or ucsc database name */
 
 /* ######################################################################### */
 /*  functions in getData.c */
 
 void apiGetData(char *words[MAX_PATH_INFO]);
 /* 'getData' function, words[1] is the subCommand */
 
 /* ######################################################################### */
 /*  functions in list.c */
 
 void apiList(char *words[MAX_PATH_INFO]);
 /* 'list' function words[1] is the subCommand */
 
 #endif	/*	 DATAAPH_H	*/