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
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
|
#include "first.h"
#include "base.h"
#include "keyvalue.h"
#include "log.h"
#include "buffer.h"
#include "burl.h"
#include "http_header.h"
#include "plugin.h"
#include <stdlib.h>
#include <string.h>
typedef struct {
pcre_keyvalue_buffer *redirect;
int redirect_code;
} plugin_config;
typedef struct {
PLUGIN_DATA;
plugin_config defaults;
plugin_config conf;
} plugin_data;
INIT_FUNC(mod_redirect_init) {
return ck_calloc(1, sizeof(plugin_data));
}
FREE_FUNC(mod_redirect_free) {
plugin_data * const p = p_d;
if (NULL == p->cvlist) return;
/* (init i to 0 if global context; to 1 to skip empty global context) */
for (int i = !p->cvlist[0].v.u2[1], used = p->nconfig; i < used; ++i) {
config_plugin_value_t *cpv = p->cvlist + p->cvlist[i].v.u2[0];
for (; -1 != cpv->k_id; ++cpv) {
switch (cpv->k_id) {
case 0: /* url.redirect */
if (cpv->vtype == T_CONFIG_LOCAL)
pcre_keyvalue_buffer_free(cpv->v.v);
break;
default:
break;
}
}
}
}
static void mod_redirect_merge_config_cpv(plugin_config * const pconf, const config_plugin_value_t * const cpv) {
switch (cpv->k_id) { /* index into static config_plugin_keys_t cpk[] */
case 0: /* url.redirect */
if (cpv->vtype == T_CONFIG_LOCAL)
pconf->redirect = cpv->v.v;
break;
case 1: /* url.redirect-code */
pconf->redirect_code = cpv->v.shrt;
break;
default:/* should not happen */
return;
}
}
static void mod_redirect_merge_config(plugin_config * const pconf, const config_plugin_value_t *cpv) {
do {
mod_redirect_merge_config_cpv(pconf, cpv);
} while ((++cpv)->k_id != -1);
}
static void mod_redirect_patch_config(request_st * const r, plugin_data * const p) {
p->conf = p->defaults; /* copy small struct instead of memcpy() */
/*memcpy(&p->conf, &p->defaults, sizeof(plugin_config));*/
for (int i = 1, used = p->nconfig; i < used; ++i) {
if (config_check_cond(r, (uint32_t)p->cvlist[i].k_id))
mod_redirect_merge_config(&p->conf, p->cvlist+p->cvlist[i].v.u2[0]);
}
}
static pcre_keyvalue_buffer * mod_redirect_parse_list(server *srv, const array *a, const int condidx) {
const int pcre_jit = config_feature_bool(srv, "server.pcre_jit", 1);
pcre_keyvalue_buffer * const kvb = pcre_keyvalue_buffer_init();
kvb->cfgidx = condidx;
buffer * const tb = srv->tmp_buf;
int percent = 0;
for (uint32_t j = 0; j < a->used; ++j) {
data_string *ds = (data_string *)a->data[j];
if (srv->srvconf.http_url_normalize) {
pcre_keyvalue_burl_normalize_key(&ds->key, tb);
pcre_keyvalue_burl_normalize_value(&ds->value, tb);
}
for (const char *s = ds->value.ptr; (s = strchr(s, '%')); ++s) {
if (s[1] == '%')
++s;
else if (light_isdigit(s[1]) || s[1] == '{') {
percent |= 1;
break;
}
}
if (!pcre_keyvalue_buffer_append(srv->errh, kvb, &ds->key, &ds->value,
pcre_jit)) {
log_error(srv->errh, __FILE__, __LINE__,
"pcre-compile failed for %s", ds->key.ptr);
pcre_keyvalue_buffer_free(kvb);
return NULL;
}
}
if (percent)
kvb->x0 = config_capture(srv, condidx);
return kvb;
}
SETDEFAULTS_FUNC(mod_redirect_set_defaults) {
static const config_plugin_keys_t cpk[] = {
{ CONST_STR_LEN("url.redirect"),
T_CONFIG_ARRAY_KVSTRING,
T_CONFIG_SCOPE_CONNECTION }
,{ CONST_STR_LEN("url.redirect-code"),
T_CONFIG_SHORT,
T_CONFIG_SCOPE_CONNECTION }
,{ NULL, 0,
T_CONFIG_UNSET,
T_CONFIG_SCOPE_UNSET }
};
plugin_data * const p = p_d;
if (!config_plugin_values_init(srv, p, cpk, "mod_redirect"))
return HANDLER_ERROR;
/* process and validate config directives
* (init i to 0 if global context; to 1 to skip empty global context) */
for (int i = !p->cvlist[0].v.u2[1]; i < p->nconfig; ++i) {
config_plugin_value_t *cpv = p->cvlist + p->cvlist[i].v.u2[0];
for (; -1 != cpv->k_id; ++cpv) {
switch (cpv->k_id) {
case 0: /* url.redirect */
cpv->v.v =
mod_redirect_parse_list(srv, cpv->v.a, p->cvlist[i].k_id);
if (NULL == cpv->v.v) return HANDLER_ERROR;
cpv->vtype = T_CONFIG_LOCAL;
break;
case 1: /* url.redirect-code */
if (cpv->v.shrt < 100 || cpv->v.shrt >= 1000) cpv->v.shrt = 301;
break;
default:/* should not happen */
break;
}
}
}
p->defaults.redirect_code = 301;
/* initialize p->defaults from global config context */
if (p->nconfig > 0 && p->cvlist->v.u2[1]) {
const config_plugin_value_t *cpv = p->cvlist + p->cvlist->v.u2[0];
if (-1 != cpv->k_id)
mod_redirect_merge_config(&p->defaults, cpv);
}
return HANDLER_GO_ON;
}
URIHANDLER_FUNC(mod_redirect_uri_handler) {
plugin_data * const p = p_d;
struct burl_parts_t burl;
pcre_keyvalue_ctx ctx;
handler_t rc;
mod_redirect_patch_config(r, p);
if (!p->conf.redirect || !p->conf.redirect->used) return HANDLER_GO_ON;
ctx.cache = NULL;
if (p->conf.redirect->x0) { /*(p->conf.redirect->x0 is capture_idx)*/
ctx.cache = r->cond_match[p->conf.redirect->x0 - 1];
}
ctx.burl = &burl;
burl.scheme = &r->uri.scheme;
burl.authority = &r->uri.authority;
burl.port = sock_addr_get_port(&r->con->srv_socket->addr);
burl.path = &r->target; /*(uri-encoded and includes query-part)*/
burl.query = &r->uri.query;
if (buffer_is_blank(burl.authority))
burl.authority = r->server_name;
/* redirect URL on match
* e.g. redirect /base/ to /index.php?section=base
*/
buffer * const tb = r->tmp_buf;
rc = pcre_keyvalue_buffer_process(p->conf.redirect, &ctx,
&r->target, tb);
if (HANDLER_FINISHED == rc) {
http_header_response_set(r, HTTP_HEADER_LOCATION,
CONST_STR_LEN("Location"),
BUF_PTR_LEN(tb));
r->http_status = p->conf.redirect_code;
r->handler_module = NULL;
r->resp_body_finished = 1;
}
else if (HANDLER_ERROR == rc) {
log_error(r->conf.errh, __FILE__, __LINE__,
"pcre_exec() error while processing uri: %s",
r->target.ptr);
}
return rc;
}
__attribute_cold__
__declspec_dllexport__
int mod_redirect_plugin_init(plugin *p);
int mod_redirect_plugin_init(plugin *p) {
p->version = LIGHTTPD_VERSION_ID;
p->name = "redirect";
p->init = mod_redirect_init;
p->handle_uri_clean = mod_redirect_uri_handler;
p->set_defaults = mod_redirect_set_defaults;
p->cleanup = mod_redirect_free;
return 0;
}
|
