1 /**
2 * collection4 - action_list_graphs_json.c
3 * Copyright (C) 2010,2011 Florian octo Forster
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 * Boston, MA 02110-1301 USA
19 *
20 * Authors:
21 * Florian octo Forster <ff at octo.it>
22 **/
24 #include <stdlib.h>
25 #include <stdio.h>
26 #include <string.h>
27 #include <errno.h>
29 #include "action_list_graphs_json.h"
30 #include "common.h"
31 #include "graph.h"
32 #include "graph_list.h"
33 #include "utils_cgi.h"
35 #include <fcgiapp.h>
36 #include <fcgi_stdio.h>
38 static void write_callback (__attribute__((unused)) void *ctx, /* {{{ */
39 const char *str, unsigned int len)
40 {
41 fwrite ((void *) str, /* size = */ len, /* nmemb = */ 1, stdout);
42 } /* }}} void write_callback */
44 static int print_one_graph (graph_config_t *cfg, /* {{{ */
45 void *user_data)
46 {
47 char params[1024];
48 char title[1024];
49 size_t num_instances;
51 yajl_gen handler = user_data;
53 num_instances = graph_num_instances (cfg);
54 if (num_instances < 1)
55 return (0);
57 yajl_gen_map_open (handler);
59 memset (title, 0, sizeof (title));
60 graph_get_title (cfg, title, sizeof (title));
62 memset (params, 0, sizeof (params));
63 graph_get_params (cfg, params, sizeof (params));
65 yajl_gen_string (handler,
66 (unsigned char *) "title",
67 (unsigned int) strlen ("title"));
68 yajl_gen_string (handler,
69 (unsigned char *) title,
70 (unsigned int) strlen (title));
72 yajl_gen_string (handler,
73 (unsigned char *) "params",
74 (unsigned int) strlen ("params"));
75 yajl_gen_string (handler,
76 (unsigned char *) params,
77 (unsigned int) strlen (params));
79 yajl_gen_string (handler,
80 (unsigned char *) "num_instances",
81 (unsigned int) strlen ("num_instances"));
82 yajl_gen_integer (handler, (long int) num_instances);
84 yajl_gen_map_close (handler);
86 return (0);
87 } /* }}} int print_one_graph */
89 static int print_all_graphs (yajl_gen handler) /* {{{ */
90 {
91 const char *dynamic;
92 _Bool include_dynamic = 0;
94 dynamic = param ("dynamic");
95 if ((dynamic != NULL)
96 && (strcmp ("true", dynamic) == 0))
97 include_dynamic = 1;
99 yajl_gen_array_open (handler);
101 gl_graph_get_all (include_dynamic, print_one_graph,
102 /* user_data = */ handler);
104 yajl_gen_array_close (handler);
106 return (0);
107 } /* }}} int print_all_graphs */
109 int action_list_graphs_json (void) /* {{{ */
110 {
111 graph_config_t *cfg;
113 yajl_gen_config handler_config;
114 yajl_gen handler;
116 time_t now;
117 char time_buffer[128];
118 int status;
120 memset (&handler_config, 0, sizeof (handler_config));
121 handler_config.beautify = 1;
122 handler_config.indentString = " ";
124 handler = yajl_gen_alloc2 (write_callback,
125 &handler_config,
126 /* alloc functions = */ NULL,
127 /* context = */ NULL);
128 if (handler == NULL)
129 return (-1);
131 printf ("Content-Type: application/json\n");
133 now = time (NULL);
134 status = time_to_rfc1123 (now + 300, time_buffer, sizeof (time_buffer));
135 if (status == 0)
136 printf ("Expires: %s\n"
137 "Cache-Control: public\n",
138 time_buffer);
139 printf ("\n");
141 print_all_graphs (handler);
143 yajl_gen_free (handler);
145 return (status);
146 } /* }}} int action_list_graphs_json */
148 /* vim: set sw=2 sts=2 et fdm=marker : */