From: oetiker Date: Sun, 15 Jan 2012 16:31:12 +0000 (+0000) Subject: integrated json support in rrdtool xport with inspiration from Erik Kastner and Micha... X-Git-Url: https://git.tokkee.org/?p=rrdtool-all.git;a=commitdiff_plain;h=acfaaef329060fcd6588be55f0eed1c23b485f2a integrated json support in rrdtool xport with inspiration from Erik Kastner and Michael Markstaller -- Tobi git-svn-id: svn://svn.oetiker.ch/rrdtool/trunk@2250 a5681a0c-68f1-0310-ab6d-d61299d08faa --- diff --git a/program/src/rrd_tool.c b/program/src/rrd_tool.c index 0772b889..1129f256 100644 --- a/program/src/rrd_tool.c +++ b/program/src/rrd_tool.c @@ -207,7 +207,7 @@ void PrintUsage( N_("* xport - generate XML dump from one or several RRD\n\n" "\trrdtool xport [-s|--start seconds] [-e|--end seconds]\n" "\t\t[-m|--maxrows rows]\n" "\t\t[--step seconds]\n" - "\t\t[--enumds]\n" "\t\t[DEF:vname=rrd:ds-name:CF]\n" + "\t\t[--enumds] [--json]\n" "\t\t[DEF:vname=rrd:ds-name:CF]\n" "\t\t[CDEF:vname=rpn-expression]\n" "\t\t[XPORT:vname:legend]\n"); const char *help_quit = @@ -711,6 +711,7 @@ int HandleInputLine( rrd_value_t *data, *ptr; char **legend_v; int enumds = 0; + int json = 0; int i; size_t vtag_s = strlen(COL_DATA_TAG) + 10; char *vtag = malloc(vtag_s); @@ -718,6 +719,8 @@ int HandleInputLine( for (i = 2; i < argc; i++) { if (strcmp("--enumds", argv[i]) == 0) enumds = 1; + if (strcmp("--json", argv[i]) == 0) + json = 1; } if (rrd_xport @@ -727,56 +730,117 @@ int HandleInputLine( setlocale(LC_NUMERIC, "C"); row_cnt = (end - start) / step; ptr = data; - printf("\n\n", - XML_ENCODING); - printf("<%s>\n", ROOT_TAG); - printf(" <%s>\n", META_TAG); - printf(" <%s>%lld\n", META_START_TAG, - (long long int) start + step, META_START_TAG); - printf(" <%s>%lu\n", META_STEP_TAG, step, META_STEP_TAG); - printf(" <%s>%lld\n", META_END_TAG, (long long int) end, - META_END_TAG); - printf(" <%s>%lu\n", META_ROWS_TAG, row_cnt, - META_ROWS_TAG); - printf(" <%s>%lu\n", META_COLS_TAG, col_cnt, - META_COLS_TAG); - printf(" <%s>\n", LEGEND_TAG); + if (json == 0){ + printf("\n\n", + XML_ENCODING); + printf("<%s>\n", ROOT_TAG); + printf(" <%s>\n", META_TAG); + } + else { + printf("{ about: 'RRDtool xport JSON output',\n meta: {\n"); + } + + +#define pXJV(indent,fmt,tag,value) \ + if (json) { \ + printf(indent "%s: " fmt ",\n",tag,value); \ + } else { \ + printf(indent "<%s>" fmt "\n",tag,value,tag); \ + } + + pXJV(" ","%lld",META_START_TAG,(long long int) start + step); + pXJV(" ","%lu", META_STEP_TAG, step); + pXJV(" ","%lld",META_END_TAG,(long long int) start + step); + if (! json){ + pXJV(" ","%lu", META_ROWS_TAG, row_cnt); + pXJV(" ","%lu", META_COLS_TAG, col_cnt); + } + + if (json){ + printf(" %s: [\n", LEGEND_TAG); + } + else { + printf(" <%s>\n", LEGEND_TAG); + } for (j = 0; j < col_cnt; j++) { char *entry = NULL; - entry = legend_v[j]; - printf(" <%s>%s\n", LEGEND_ENTRY_TAG, entry, + if (json){ + printf(" '%s'", entry); + if (j < col_cnt -1){ + printf(","); + } + printf("\n"); + } + else { + printf(" <%s>%s\n", LEGEND_ENTRY_TAG, entry, LEGEND_ENTRY_TAG); + } free(entry); } free(legend_v); - printf(" \n", LEGEND_TAG); - printf(" \n", META_TAG); - printf(" <%s>\n", DATA_TAG); + if (json){ + printf(" ]\n },\n"); + } + else { + printf(" \n", LEGEND_TAG); + printf(" \n", META_TAG); + } + + if (json){ + printf(" %s: [\n",DATA_TAG); + } else { + printf(" <%s>\n", DATA_TAG); + } for (ti = start + step; ti <= end; ti += step) { - printf(" <%s>", DATA_ROW_TAG); - printf("<%s>%lld", COL_TIME_TAG, (long long int)ti, COL_TIME_TAG); + if (json){ + printf(" [ "); + } + else { + printf(" <%s>", DATA_ROW_TAG); + printf("<%s>%lld", COL_TIME_TAG, (long long int)ti, COL_TIME_TAG); + } for (j = 0; j < col_cnt; j++) { rrd_value_t newval = DNAN; - - if (enumds == 1) - - snprintf(vtag, vtag_s, "%s%lu", COL_DATA_TAG, j); - else - snprintf(vtag, vtag_s, "%s", COL_DATA_TAG); newval = *ptr; - if (isnan(newval)) { - printf("<%s>NaN", vtag, vtag); - } else { - printf("<%s>%0.10e", vtag, newval, vtag); - }; + if (json){ + if (isnan(newval)){ + printf("null"); + } else { + printf("%0.10e",newval); + } + if (j < col_cnt -1){ + printf(", "); + } + } + else { + if (enumds == 1) + snprintf(vtag, vtag_s, "%s%lu", COL_DATA_TAG, j); + else + snprintf(vtag, vtag_s, "%s", COL_DATA_TAG); + if (isnan(newval)) { + printf("<%s>NaN", vtag, vtag); + } else { + printf("<%s>%0.10e", vtag, newval, vtag); + }; + } ptr++; + } + if (json){ + printf(ti < end ? " ],\n" : " ]\n"); + } + else { + printf("\n", DATA_ROW_TAG); } - printf("\n", DATA_ROW_TAG); } free(data); - printf(" \n", DATA_TAG); - printf("\n", ROOT_TAG); + if (json){ + printf(" ]\n}\n"); + } + else { + printf(" \n", DATA_TAG); + printf("\n", ROOT_TAG); + } setlocale(LC_NUMERIC, old_locale); } free(vtag); diff --git a/program/src/rrd_xport.c b/program/src/rrd_xport.c index 8f13492a..5ee0fdfb 100644 --- a/program/src/rrd_xport.c +++ b/program/src/rrd_xport.c @@ -65,6 +65,7 @@ int rrd_xport( {"maxrows", required_argument, 0, 'm'}, {"step", required_argument, 0, 261}, {"enumds", no_argument, 0, 262}, /* these are handled in the frontend ... */ + {"json", no_argument, 0, 263}, /* these are handled in the frontend ... */ {"daemon", required_argument, 0, 'd'}, {0, 0, 0, 0} };