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#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;
data_config *context; /* to which apply me */
unsigned short redirect_code;
} plugin_config;
typedef struct {
PLUGIN_DATA;
plugin_config **config_storage;
plugin_config conf;
} plugin_data;
INIT_FUNC(mod_redirect_init) {
return calloc(1, sizeof(plugin_data));
}
FREE_FUNC(mod_redirect_free) {
plugin_data *p = p_d;
if (!p) return HANDLER_GO_ON;
if (p->config_storage) {
size_t i;
for (i = 0; i < srv->config_context->used; i++) {
plugin_config *s = p->config_storage[i];
if (NULL == s) continue;
pcre_keyvalue_buffer_free(s->redirect);
free(s);
}
free(p->config_storage);
}
free(p);
return HANDLER_GO_ON;
}
SETDEFAULTS_FUNC(mod_redirect_set_defaults) {
plugin_data *p = p_d;
size_t i = 0;
config_values_t cv[] = {
{ "url.redirect", NULL, T_CONFIG_LOCAL, T_CONFIG_SCOPE_CONNECTION }, /* 0 */
{ "url.redirect-code", NULL, T_CONFIG_SHORT, T_CONFIG_SCOPE_CONNECTION }, /* 1 */
{ NULL, NULL, T_CONFIG_UNSET, T_CONFIG_SCOPE_UNSET }
};
if (!p) return HANDLER_ERROR;
/* 0 */
p->config_storage = calloc(1, srv->config_context->used * sizeof(plugin_config *));
for (i = 0; i < srv->config_context->used; i++) {
data_config const* config = (data_config const*)srv->config_context->data[i];
plugin_config *s;
size_t j;
data_unset *du;
data_array *da;
s = calloc(1, sizeof(plugin_config));
s->redirect = pcre_keyvalue_buffer_init();
s->redirect_code = 301;
cv[0].destination = s->redirect;
cv[1].destination = &(s->redirect_code);
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 (s->redirect_code < 100 || s->redirect_code >= 1000) s->redirect_code = 301;
if (NULL == (du = array_get_element(config->value, "url.redirect"))) {
/* no url.redirect defined */
continue;
}
da = (data_array *)du;
if (du->type != TYPE_ARRAY || !array_is_kvstring(da->value)) {
log_error_write(srv, __FILE__, __LINE__, "s",
"unexpected value for url.redirect; expected list of \"regex\" => \"redirect\"");
return HANDLER_ERROR;
}
for (j = 0; j < da->value->used; j++) {
data_string *ds = (data_string *)da->value->data[j];
if (srv->srvconf.http_url_normalize) {
pcre_keyvalue_burl_normalize_key(ds->key, srv->tmp_buf);
pcre_keyvalue_burl_normalize_value(ds->value, srv->tmp_buf);
}
if (0 != pcre_keyvalue_buffer_append(srv, s->redirect, ds->key, ds->value)) {
log_error_write(srv, __FILE__, __LINE__, "sb",
"pcre-compile failed for", ds->key);
return HANDLER_ERROR;
}
}
}
return HANDLER_GO_ON;
}
static int mod_redirect_patch_connection(server *srv, connection *con, plugin_data *p) {
size_t i, j;
plugin_config *s = p->config_storage[0];
p->conf.redirect = s->redirect;
p->conf.redirect_code = s->redirect_code;
p->conf.context = NULL;
/* skip the first, the global context */
for (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 (j = 0; j < dc->value->used; j++) {
data_unset *du = dc->value->data[j];
if (0 == strcmp(du->key->ptr, "url.redirect")) {
p->conf.redirect = s->redirect;
p->conf.context = dc;
} else if (0 == strcmp(du->key->ptr, "url.redirect-code")) {
p->conf.redirect_code = s->redirect_code;
}
}
}
return 0;
}
URIHANDLER_FUNC(mod_redirect_uri_handler) {
plugin_data *p = p_d;
struct burl_parts_t burl;
pcre_keyvalue_ctx ctx;
handler_t rc;
mod_redirect_patch_connection(srv, con, p);
if (!p->conf.redirect->used) return HANDLER_GO_ON;
ctx.cache = p->conf.context
? &con->cond_cache[p->conf.context->context_ndx]
: NULL;
ctx.burl = &burl;
burl.scheme = con->uri.scheme;
burl.authority = con->uri.authority;
burl.port = sock_addr_get_port(&con->srv_socket->addr);
burl.path = con->uri.path_raw;
burl.query = con->uri.query;
if (buffer_string_is_empty(burl.authority))
burl.authority = con->server_name;
/* redirect URL on match
* e.g. redirect /base/ to /index.php?section=base
*/
rc = pcre_keyvalue_buffer_process(p->conf.redirect, &ctx,
con->request.uri, srv->tmp_buf);
if (HANDLER_FINISHED == rc) {
http_header_response_set(con, HTTP_HEADER_LOCATION,
CONST_STR_LEN("Location"),
CONST_BUF_LEN(srv->tmp_buf));
con->http_status = p->conf.redirect_code;
con->mode = DIRECT;
con->file_finished = 1;
}
else if (HANDLER_ERROR == rc) {
log_error_write(srv, __FILE__, __LINE__, "sb",
"pcre_exec() error while processing uri:",
con->request.uri);
}
return rc;
}
int mod_redirect_plugin_init(plugin *p);
int mod_redirect_plugin_init(plugin *p) {
p->version = LIGHTTPD_VERSION_ID;
p->name = buffer_init_string("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;
p->data = NULL;
return 0;
}
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