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