1 #include "base.h"
2 #include "log.h"
3 #include "buffer.h"
4
5 #include "plugin.h"
6
7 #include <ctype.h>
8 #include <stdlib.h>
9 #include <string.h>
10
11 /**
12 * this is a skeleton for a lighttpd plugin
13 *
14 * just replaces every occurance of 'skeleton' by your plugin name
15 *
16 * e.g. in vim:
17 *
18 * :%s/skeleton/myhandler/
19 *
20 */
21
22
23
24 /* plugin config for all request/connections */
25
26 typedef struct {
27 array *match;
28 } plugin_config;
29
30 typedef struct {
31 PLUGIN_DATA;
32
33 buffer *match_buf;
34
35 plugin_config **config_storage;
36
37 plugin_config conf;
38 } plugin_data;
39
40 typedef struct {
41 size_t foo;
42 } handler_ctx;
43
handler_ctx_init()44 static handler_ctx * handler_ctx_init() {
45 handler_ctx * hctx;
46
47 hctx = calloc(1, sizeof(*hctx));
48
49 return hctx;
50 }
51
handler_ctx_free(handler_ctx * hctx)52 static void handler_ctx_free(handler_ctx *hctx) {
53
54 free(hctx);
55 }
56
57 /* init the plugin data */
INIT_FUNC(mod_skeleton_init)58 INIT_FUNC(mod_skeleton_init) {
59 plugin_data *p;
60
61 p = calloc(1, sizeof(*p));
62
63 p->match_buf = buffer_init();
64
65 return p;
66 }
67
68 /* detroy the plugin data */
FREE_FUNC(mod_skeleton_free)69 FREE_FUNC(mod_skeleton_free) {
70 plugin_data *p = p_d;
71
72 UNUSED(srv);
73
74 if (!p) return HANDLER_GO_ON;
75
76 if (p->config_storage) {
77 size_t i;
78
79 for (i = 0; i < srv->config_context->used; i++) {
80 plugin_config *s = p->config_storage[i];
81
82 if (!s) continue;
83
84 array_free(s->match);
85
86 free(s);
87 }
88 free(p->config_storage);
89 }
90
91 buffer_free(p->match_buf);
92
93 free(p);
94
95 return HANDLER_GO_ON;
96 }
97
98 /* handle plugin config and check values */
99
SETDEFAULTS_FUNC(mod_skeleton_set_defaults)100 SETDEFAULTS_FUNC(mod_skeleton_set_defaults) {
101 plugin_data *p = p_d;
102 size_t i = 0;
103
104 config_values_t cv[] = {
105 { "skeleton.array", NULL, T_CONFIG_ARRAY, T_CONFIG_SCOPE_CONNECTION }, /* 0 */
106 { NULL, NULL, T_CONFIG_UNSET, T_CONFIG_SCOPE_UNSET }
107 };
108
109 if (!p) return HANDLER_ERROR;
110
111 p->config_storage = calloc(1, srv->config_context->used * sizeof(specific_config *));
112
113 for (i = 0; i < srv->config_context->used; i++) {
114 plugin_config *s;
115
116 s = calloc(1, sizeof(plugin_config));
117 s->match = array_init();
118
119 cv[0].destination = s->match;
120
121 p->config_storage[i] = s;
122
123 if (0 != config_insert_values_global(srv, ((data_config *)srv->config_context->data[i])->value, cv)) {
124 return HANDLER_ERROR;
125 }
126 }
127
128 return HANDLER_GO_ON;
129 }
130
131 #define PATCH(x) \
132 p->conf.x = s->x;
mod_skeleton_patch_connection(server * srv,connection * con,plugin_data * p)133 static int mod_skeleton_patch_connection(server *srv, connection *con, plugin_data *p) {
134 size_t i, j;
135 plugin_config *s = p->config_storage[0];
136
137 PATCH(match);
138
139 /* skip the first, the global context */
140 for (i = 1; i < srv->config_context->used; i++) {
141 data_config *dc = (data_config *)srv->config_context->data[i];
142 s = p->config_storage[i];
143
144 /* condition didn't match */
145 if (!config_check_cond(srv, con, dc)) continue;
146
147 /* merge config */
148 for (j = 0; j < dc->value->used; j++) {
149 data_unset *du = dc->value->data[j];
150
151 if (buffer_is_equal_string(du->key, CONST_STR_LEN("skeleton.array"))) {
152 PATCH(match);
153 }
154 }
155 }
156
157 return 0;
158 }
159 #undef PATCH
160
URIHANDLER_FUNC(mod_skeleton_uri_handler)161 URIHANDLER_FUNC(mod_skeleton_uri_handler) {
162 plugin_data *p = p_d;
163 int s_len;
164 size_t k, i;
165
166 UNUSED(srv);
167
168 if (con->mode != DIRECT) return HANDLER_GO_ON;
169
170 if (con->uri.path->used == 0) return HANDLER_GO_ON;
171
172 mod_skeleton_patch_connection(srv, con, p);
173
174 s_len = con->uri.path->used - 1;
175
176 for (k = 0; k < p->conf.match->used; k++) {
177 data_string *ds = (data_string *)p->conf.match->data[k];
178 int ct_len = ds->value->used - 1;
179
180 if (ct_len > s_len) continue;
181 if (ds->value->used == 0) continue;
182
183 if (0 == strncmp(con->uri.path->ptr + s_len - ct_len, ds->value->ptr, ct_len)) {
184 con->http_status = 403;
185
186 return HANDLER_FINISHED;
187 }
188 }
189
190 /* not found */
191 return HANDLER_GO_ON;
192 }
193
194 /* this function is called at dlopen() time and inits the callbacks */
195
mod_skeleton_plugin_init(plugin * p)196 int mod_skeleton_plugin_init(plugin *p) {
197 p->version = LIGHTTPD_VERSION_ID;
198 p->name = buffer_init_string("skeleton");
199
200 p->init = mod_skeleton_init;
201 p->handle_uri_clean = mod_skeleton_uri_handler;
202 p->set_defaults = mod_skeleton_set_defaults;
203 p->cleanup = mod_skeleton_free;
204
205 p->data = NULL;
206
207 return 0;
208 }
209