4061e76e6ead3d4a59704aab422abef16e3cfd2e
hiram
  Tue Feb 19 11:41:29 2019 -0800
beginning to return data from track hub bigBed files refs #18869

diff --git src/hg/hubApi/hubApi.c src/hg/hubApi/hubApi.c
index a80b2df..112b26e 100644
--- src/hg/hubApi/hubApi.c
+++ src/hg/hubApi/hubApi.c
@@ -519,30 +519,32 @@
 
 hPrintf("<h2>Example URLs to return json data structures:</h2>\n");
 hPrintf("<ol>\n");
 hPrintf("<li><a href='/cgi-bin/hubApi/list/publicHubs' target=_blank>list public hubs</a> <em>/cgi-bin/hubApi/list/publicHubs</em></li>\n");
 hPrintf("<li><a href='/cgi-bin/hubApi/list/ucscGenomes' target=_blank>list database genomes</a> <em>/cgi-bin/hubApi/list/ucscGenomes</em></li>\n");
 hPrintf("<li><a href='/cgi-bin/hubApi/list/hubGenomes?hubUrl=%s' target=_blank>list genomes from specified hub</a> <em>/cgi-bin/hubApi/list/hubGenomes?hubUrl=%s</em></li>\n", url, url);
 hPrintf("<li><a href='/cgi-bin/hubApi/list/tracks?hubUrl=%s&genome=%s' target=_blank>list tracks from specified hub and genome</a> <em>/cgi-bin/hubApi/list/tracks?hubUrl=%s&genome=%s</em></li>\n", url, hubGenome->name, url, hubGenome->name);
 hPrintf("<li><a href='/cgi-bin/hubApi/list/tracks?db=%s' target=_blank>list tracks from specified UCSC database</a> <em>/cgi-bin/hubApi/list/tracks?db=%s</em></li>\n", ucscDb, ucscDb);
 hPrintf("<li><a href='/cgi-bin/hubApi/list/chromosomes?db=%s' target=_blank>list chromosomes from specified UCSC database</a> <em>/cgi-bin/hubApi/list/chromosomes?db=%s</em></li>\n", ucscDb, ucscDb);
 hPrintf("<li><a href='/cgi-bin/hubApi/list/chromosomes?db=%s&track=gap' target=_blank>list chromosomes from specified track from UCSC databaset</a> <em>/cgi-bin/hubApi/list/chromosomes?db=%s&track=gap</em></li>\n", ucscDb, ucscDb);
 hPrintf("<li><a href='/cgi-bin/hubApi/getData/sequence?db=%s&chrom=chrM' target=_blank>get sequence from specified database and chromosome</a> <em>/cgi-bin/hubApi/getData/sequence?db=%s&chrom=chrM</em></li>\n", ucscDb, ucscDb);
 hPrintf("<li><a href='/cgi-bin/hubApi/getData/sequence?db=%s&chrom=chrM&start=0&end=128' target=_blank>get sequence from specified database, chromosome with start,end coordinates</a> <em>/cgi-bin/hubApi/getData/sequence?db=%s&chrom=chrM&start=0&end=128</em></li>\n", ucscDb, ucscDb);
 hPrintf("<li><a href='/cgi-bin/hubApi/getData/track?db=%s&track=gold' target=_blank>get entire track data from specified database and track name (gold == Assembly)</a> <em>/cgi-bin/hubApi/getData/track?db=%s&track=gold</em></li>\n", ucscDb, ucscDb);
 hPrintf("<li><a href='/cgi-bin/hubApi/getData/track?db=%s&chrom=chrM&track=gold' target=_blank>get track data from specified database, chromosome and track name (gold == Assembly)</a> <em>/cgi-bin/hubApi/getData/track?db=%s&chrom=chrM&track=gold</em></li>\n", ucscDb, ucscDb);
 hPrintf("<li><a href='/cgi-bin/hubApi/getData/track?db=%s&chrom=chrI&track=gold&start=107680&end=186148' target=_blank>get track data from specified database, chromosome, track name, start and end coordinates</a> <em>/cgi-bin/hubApi/getData/track?db=%s&chrom=chr1&track=gold&start=107680&end=186148</em></li>\n", ucscDb, ucscDb);
+hPrintf("<li><a href='/cgi-bin/hubApi/getData/track?hubUrl=http://genome-test.gi.ucsc.edu/~hiram/hubs/Plants/hub.txt&genome=_araTha1&chrom=chr1&track=assembly_&start=0&end=14309681' target=_blank>get track data from specified hub, chromosome, track name, start and end coordinates</a> <em>/cgi-bin/hubApi/getData/track?hubUrl=http://genome-test.gi.ucsc.edu/~hiram/hubs/Plants/hub.txt&genome=_araTha1&chrom=chr1&track=assembly_&start=0&end=14309681</em></li>\n");
+
 hPrintf("</ol>\n");
 }	/*	static void showExamples()	*/
 
 #ifdef NOT
 static void showCartDump()
 /* for information purposes only during development, will become obsolete */
 {
 hPrintf("<h4>cart dump</h4>");
 hPrintf("<pre>\n");
 cartDump(cart);
 hPrintf("</pre>\n");
 }
 #endif
 
 static void doMiddle(struct cart *theCart)
@@ -598,31 +600,31 @@
 
 cartWebStart(cart, database, "access mechanism to hub data resources");
 
 char *goOtherHub = cartUsualString(cart, "goOtherHub", defaultHub);
 char *goUcscDb = cartUsualString(cart, "goUcscDb", "");
 char *otherHubUrl = cartUsualString(cart, "urlHub", defaultHub);
 char *goPublicHub = cartUsualString(cart, "goPublicHub", defaultHub);
 char *hubDropDown = cartUsualString(cart, "publicHubs", defaultHub);
 char *urlDropDown = urlFromShortLabel(hubDropDown);
 char *ucscDb = cartUsualString(cart, "ucscGenomes", defaultDb);
 char *urlInput = urlDropDown;	/* assume public hub */
 if (sameWord("go", goOtherHub))	/* requested other hub URL */
     urlInput = otherHubUrl;
 
 long lastTime = clock1000();
-struct trackHub *hub = trackHubOpen(urlInput, "");
+struct trackHub *hub = errCatchTrackHubOpen(urlInput);
 if (measureTiming)
     {
     long thisTime = clock1000();
     hPrintf("<em>hub open time: %ld millis</em><br>\n", thisTime - lastTime);
     }
 
 // hPrintf("<h3>ucscDb: '%s'</h2>\n", ucscDb);
 
 struct trackHubGenome *hubGenome = hub->genomeList;
 
 showExamples(urlInput, hubGenome, ucscDb);
 
 // showCartDump();
 
 hPrintf("<form action='%s' name='hubApiUrl' id='hubApiUrl' method='GET'>\n\n", "../cgi-bin/hubApi");