lighttpd 1.4.x https://www.lighttpd.net/
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lighttpd1.4/src/mod_vhostdb.c

223 lines
6.4 KiB

#include "first.h"
#include "base.h"
#include "plugin.h"
#include "http_vhostdb.h"
#include "log.h"
#include "stat_cache.h"
#include <stdlib.h>
#include <string.h>
/**
* vhostdb framework
*/
typedef struct {
const http_vhostdb_backend_t *vhostdb_backend;
} plugin_config;
typedef struct {
PLUGIN_DATA;
plugin_config defaults;
plugin_config conf;
buffer tmp_buf;
} plugin_data;
INIT_FUNC(mod_vhostdb_init) {
return calloc(1, sizeof(plugin_data));
}
FREE_FUNC(mod_vhostdb_free) {
plugin_data *p = p_d;
free(p->tmp_buf.ptr);
}
static void mod_vhostdb_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: /* vhostdb.backend */
if (cpv->vtype == T_CONFIG_LOCAL)
pconf->vhostdb_backend = cpv->v.v;
break;
default:/* should not happen */
return;
}
}
static void mod_vhostdb_merge_config(plugin_config * const pconf, const config_plugin_value_t *cpv) {
do {
mod_vhostdb_merge_config_cpv(pconf, cpv);
} while ((++cpv)->k_id != -1);
}
static void mod_vhostdb_patch_config(connection * const con, plugin_data * const p) {
memcpy(&p->conf, &p->defaults, sizeof(plugin_config));
for (int i = 1, used = p->nconfig; i < used; ++i) {
if (config_check_cond(con, (uint32_t)p->cvlist[i].k_id))
mod_vhostdb_merge_config(&p->conf, p->cvlist + p->cvlist[i].v.u2[0]);
}
}
SETDEFAULTS_FUNC(mod_vhostdb_set_defaults) {
static const config_plugin_keys_t cpk[] = {
{ CONST_STR_LEN("vhostdb.backend"),
T_CONFIG_STRING,
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_vhostdb"))
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: /* vhostdb.backend */
if (!buffer_string_is_empty(cpv->v.b)) {
const buffer * const b = cpv->v.b;
*(const void **)&cpv->v.v = http_vhostdb_backend_get(b);
if (NULL == cpv->v.v) {
log_error(srv->errh, __FILE__, __LINE__,
"vhostdb.backend not supported: %s", b->ptr);
return HANDLER_ERROR;
}
cpv->vtype = T_CONFIG_LOCAL;
}
break;
default:/* should not happen */
break;
}
}
}
/* 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_vhostdb_merge_config(&p->defaults, cpv);
}
return HANDLER_GO_ON;
}
typedef struct {
buffer *server_name;
buffer *document_root;
} vhostdb_entry;
static vhostdb_entry * vhostdb_entry_init (void)
{
vhostdb_entry *ve = calloc(1, sizeof(*ve));
ve->server_name = buffer_init();
ve->document_root = buffer_init();
return ve;
}
static void vhostdb_entry_free (vhostdb_entry *ve)
{
buffer_free(ve->server_name);
buffer_free(ve->document_root);
free(ve);
}
CONNECTION_FUNC(mod_vhostdb_handle_connection_close) {
plugin_data *p = p_d;
vhostdb_entry *ve;
if ((ve = con->plugin_ctx[p->id])) {
con->plugin_ctx[p->id] = NULL;
vhostdb_entry_free(ve);
}
return HANDLER_GO_ON;
}
static handler_t mod_vhostdb_error_500 (connection *con)
{
con->http_status = 500; /* Internal Server Error */
con->mode = DIRECT;
return HANDLER_FINISHED;
}
static handler_t mod_vhostdb_found (connection *con, vhostdb_entry *ve)
{
/* fix virtual server and docroot */
con->server_name = con->server_name_buf;
buffer_copy_buffer(con->server_name_buf, ve->server_name);
buffer_copy_buffer(con->physical.doc_root, ve->document_root);
return HANDLER_GO_ON;
}
CONNECTION_FUNC(mod_vhostdb_handle_docroot) {
plugin_data *p = p_d;
vhostdb_entry *ve;
const http_vhostdb_backend_t *backend;
buffer *b;
stat_cache_entry *sce;
/* no host specified? */
if (buffer_string_is_empty(con->uri.authority)) return HANDLER_GO_ON;
/* XXX: future: implement larger, managed cache
* of database responses (positive and negative) */
/* check if cached this connection */
ve = con->plugin_ctx[p->id];
if (ve && buffer_is_equal(ve->server_name, con->uri.authority)) {
return mod_vhostdb_found(con, ve); /* HANDLER_GO_ON */
}
mod_vhostdb_patch_config(con, p);
if (!p->conf.vhostdb_backend) return HANDLER_GO_ON;
b = &p->tmp_buf;
backend = p->conf.vhostdb_backend;
if (0 != backend->query(con, backend->p_d, b)) {
return mod_vhostdb_error_500(con); /* HANDLER_FINISHED */
}
if (buffer_string_is_empty(b)) {
/* no such virtual host */
return HANDLER_GO_ON;
}
/* sanity check that really is a directory */
buffer_append_slash(b);
if (HANDLER_ERROR == stat_cache_get_entry(con, b, &sce)) {
log_perror(con->conf.errh, __FILE__, __LINE__, "%s", b->ptr);
return mod_vhostdb_error_500(con); /* HANDLER_FINISHED */
}
if (!S_ISDIR(sce->st.st_mode)) {
log_error(con->conf.errh, __FILE__, __LINE__,
"Not a directory: %s", b->ptr);
return mod_vhostdb_error_500(con); /* HANDLER_FINISHED */
}
/* cache the data */
if (!ve) con->plugin_ctx[p->id] = ve = vhostdb_entry_init();
buffer_copy_buffer(ve->server_name, con->uri.authority);
buffer_copy_buffer(ve->document_root, b);
return mod_vhostdb_found(con, ve); /* HANDLER_GO_ON */
}
int mod_vhostdb_plugin_init(plugin *p);
int mod_vhostdb_plugin_init(plugin *p) {
p->version = LIGHTTPD_VERSION_ID;
p->name = "vhostdb";
p->init = mod_vhostdb_init;
p->cleanup = mod_vhostdb_free;
p->set_defaults = mod_vhostdb_set_defaults;
p->handle_docroot = mod_vhostdb_handle_docroot;
p->connection_reset = mod_vhostdb_handle_connection_close;
return 0;
}