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#include "first.h"
#include "base.h"
#include "log.h"
#include "buffer.h"
#include "plugin.h"
#include "etag.h"
#include "http_chunk.h"
#include "response.h"
#include <stdlib.h>
#include <string.h>
/**
* this is a staticfile for a lighttpd plugin
*
*/
/* plugin config for all request/connections */
typedef struct {
array *exclude_ext;
unsigned short etags_used;
unsigned short disable_pathinfo;
} plugin_config;
typedef struct {
PLUGIN_DATA;
plugin_config **config_storage;
plugin_config conf;
} plugin_data;
/* init the plugin data */
INIT_FUNC(mod_staticfile_init) {
plugin_data *p;
p = calloc(1, sizeof(*p));
return p;
}
/* detroy the plugin data */
FREE_FUNC(mod_staticfile_free) {
plugin_data *p = p_d;
UNUSED(srv);
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;
array_free(s->exclude_ext);
free(s);
}
free(p->config_storage);
}
free(p);
return HANDLER_GO_ON;
}
/* handle plugin config and check values */
SETDEFAULTS_FUNC(mod_staticfile_set_defaults) {
plugin_data *p = p_d;
size_t i = 0;
config_values_t cv[] = {
{ "static-file.exclude-extensions", NULL, T_CONFIG_ARRAY, T_CONFIG_SCOPE_CONNECTION }, /* 0 */
{ "static-file.etags", NULL, T_CONFIG_BOOLEAN, T_CONFIG_SCOPE_CONNECTION }, /* 1 */
{ "static-file.disable-pathinfo", NULL, T_CONFIG_BOOLEAN, T_CONFIG_SCOPE_CONNECTION }, /* 2 */
{ 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 *));
for (i = 0; i < srv->config_context->used; i++) {
data_config const* config = (data_config const*)srv->config_context->data[i];
plugin_config *s;
s = calloc(1, sizeof(plugin_config));
s->exclude_ext = array_init();
s->etags_used = 1;
s->disable_pathinfo = 0;
cv[0].destination = s->exclude_ext;
cv[1].destination = &(s->etags_used);
cv[2].destination = &(s->disable_pathinfo);
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->exclude_ext)) {
log_error_write(srv, __FILE__, __LINE__, "s",
"unexpected value for static-file.exclude-extensions; expected list of \"ext\"");
return HANDLER_ERROR;
}
}
return HANDLER_GO_ON;
}
#define PATCH(x) \
p->conf.x = s->x;
static int mod_staticfile_patch_connection(server *srv, connection *con, plugin_data *p) {
size_t i, j;
plugin_config *s = p->config_storage[0];
PATCH(exclude_ext);
PATCH(etags_used);
PATCH(disable_pathinfo);
/* 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 (buffer_is_equal_string(du->key, CONST_STR_LEN("static-file.exclude-extensions"))) {
PATCH(exclude_ext);
} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("static-file.etags"))) {
PATCH(etags_used);
} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("static-file.disable-pathinfo"))) {
PATCH(disable_pathinfo);
}
}
}
return 0;
}
#undef PATCH
URIHANDLER_FUNC(mod_staticfile_subrequest) {
plugin_data *p = p_d;
/* someone else has done a decision for us */
if (con->http_status != 0) return HANDLER_GO_ON;
if (buffer_is_empty(con->uri.path)) return HANDLER_GO_ON;
if (buffer_is_empty(con->physical.path)) return HANDLER_GO_ON;
/* someone else has handled this request */
if (con->mode != DIRECT) return HANDLER_GO_ON;
/* we only handle GET, POST and HEAD */
switch(con->request.http_method) {
case HTTP_METHOD_GET:
case HTTP_METHOD_POST:
case HTTP_METHOD_HEAD:
break;
default:
return HANDLER_GO_ON;
}
mod_staticfile_patch_connection(srv, con, p);
if (p->conf.disable_pathinfo && !buffer_string_is_empty(con->request.pathinfo)) {
if (con->conf.log_request_handling) {
log_error_write(srv, __FILE__, __LINE__, "s", "-- NOT handling file as static file, pathinfo forbidden");
}
return HANDLER_GO_ON;
}
/* ignore certain extensions */
if (array_match_value_suffix(p->conf.exclude_ext, con->physical.path)) {
if (con->conf.log_request_handling) {
log_error_write(srv, __FILE__, __LINE__, "s", "-- NOT handling file as static file, extension forbidden");
}
return HANDLER_GO_ON;
}
if (con->conf.log_request_handling) {
log_error_write(srv, __FILE__, __LINE__, "s", "-- handling file as static file");
}
if (!p->conf.etags_used) con->etag_flags = 0;
http_response_send_file(srv, con, con->physical.path);
return HANDLER_FINISHED;
}
/* this function is called at dlopen() time and inits the callbacks */
int mod_staticfile_plugin_init(plugin *p);
int mod_staticfile_plugin_init(plugin *p) {
p->version = LIGHTTPD_VERSION_ID;
p->name = buffer_init_string("staticfile");
p->init = mod_staticfile_init;
p->handle_subrequest_start = mod_staticfile_subrequest;
p->set_defaults = mod_staticfile_set_defaults;
p->cleanup = mod_staticfile_free;
p->data = NULL;
return 0;
}
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