lighttpd 1.4.x https://www.lighttpd.net/
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#include "first.h"
#include "base.h"
#include "log.h"
#include "buffer.h"
#include "stat_cache.h"
#include "plugin.h"
#include <stdlib.h>
#include <string.h>
typedef struct {
const buffer *server_root;
const buffer *default_host;
const buffer *document_root;
unsigned short debug;
} plugin_config;
typedef struct {
PLUGIN_DATA;
plugin_config defaults;
plugin_config conf;
buffer tmp_buf;
buffer last_root;
} plugin_data;
INIT_FUNC(mod_simple_vhost_init) {
return calloc(1, sizeof(plugin_data));
}
FREE_FUNC(mod_simple_vhost_free) {
plugin_data *p = p_d;
free(p->tmp_buf.ptr);
free(p->last_root.ptr);
}
static void mod_simple_vhost_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: /* simple-vhost.server-root */
pconf->server_root = cpv->v.b;
break;
case 1: /* simple-vhost.default-host */
pconf->default_host = cpv->v.b;
break;
case 2: /* simple-vhost.document-root */
pconf->document_root = cpv->v.b;
break;
case 3: /* simple-vhost.debug */
pconf->debug = cpv->v.shrt;
break;
default:/* should not happen */
return;
}
}
static void mod_simple_vhost_merge_config(plugin_config * const pconf, const config_plugin_value_t *cpv) {
do {
mod_simple_vhost_merge_config_cpv(pconf, cpv);
} while ((++cpv)->k_id != -1);
}
static void mod_simple_vhost_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_simple_vhost_merge_config(&p->conf,
p->cvlist + p->cvlist[i].v.u2[0]);
}
}
SETDEFAULTS_FUNC(mod_simple_vhost_set_defaults) {
static const config_plugin_keys_t cpk[] = {
{ CONST_STR_LEN("simple-vhost.server-root"),
T_CONFIG_STRING,
T_CONFIG_SCOPE_CONNECTION }
,{ CONST_STR_LEN("simple-vhost.default-host"),
T_CONFIG_STRING,
T_CONFIG_SCOPE_CONNECTION }
,{ CONST_STR_LEN("simple-vhost.document-root"),
T_CONFIG_STRING,
T_CONFIG_SCOPE_CONNECTION }
,{ CONST_STR_LEN("simple-vhost.debug"),
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_simple_vhost"))
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: /* simple-vhost.server-root */
case 2: /* simple-vhost.document-root */
if (!buffer_string_is_empty(cpv->v.b)) {
buffer *b;
*(const buffer **)&b = cpv->v.b;
buffer_append_slash(b);
}
break;
case 1: /* simple-vhost.default-host */
case 3: /* simple-vhost.debug */
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_simple_vhost_merge_config(&p->defaults, cpv);
}
return HANDLER_GO_ON;
}
static void build_doc_root_path(buffer *out, const buffer *sroot, const buffer *host, const buffer *droot) {
force_assert(!buffer_string_is_empty(sroot));
buffer_copy_buffer(out, sroot);
if (!buffer_string_is_empty(host)) {
/* a hostname has to start with a alpha-numerical character
* and must not contain a slash "/"
*/
char *dp;
if (NULL == (dp = strchr(host->ptr, ':'))) {
buffer_append_string_buffer(out, host);
} else {
buffer_append_string_len(out, host->ptr, dp - host->ptr);
}
}
if (!buffer_string_is_empty(droot)) {
buffer_append_path_len(out, CONST_BUF_LEN(droot));
}
else {
buffer_append_slash(out);
}
}
static int build_doc_root(request_st * const r, plugin_data *p, buffer *out, const buffer *host) {
build_doc_root_path(out, p->conf.server_root, host, p->conf.document_root);
/* one-element cache (positive cache, not negative cache) */
if (buffer_is_equal(out, &p->last_root)) return 1;
if (!stat_cache_path_isdir(out)) {
if (p->conf.debug) {
log_perror(r->conf.errh, __FILE__, __LINE__, "%s", out->ptr);
}
return 0;
}
buffer_copy_buffer(&p->last_root, out);
return 1;
}
static handler_t mod_simple_vhost_docroot(request_st * const r, void *p_data) {
plugin_data * const p = p_data;
mod_simple_vhost_patch_config(r, p);
if (buffer_string_is_empty(p->conf.server_root)) return HANDLER_GO_ON;
/* build_doc_root() requires p->conf.server_root;
* skip module if simple-vhost.server-root not set or set to empty string */
/* (default host and HANDLER_GO_ON instead of HANDLER_ERROR (on error)
* are the two differences between mod_simple_vhost and mod_vhostdb) */
/* build document-root */
buffer * const b = &p->tmp_buf;
const buffer *host = &r->uri.authority;
if ((!buffer_string_is_empty(host) && build_doc_root(r, p, b, host))
|| build_doc_root(r, p, b, (host = p->conf.default_host))) {
r->server_name = &r->server_name_buf;
buffer_copy_buffer(&r->server_name_buf, host);
buffer_copy_buffer(&r->physical.doc_root, b);
}
return HANDLER_GO_ON;
}
int mod_simple_vhost_plugin_init(plugin *p);
int mod_simple_vhost_plugin_init(plugin *p) {
p->version = LIGHTTPD_VERSION_ID;
p->name = "simple_vhost";
p->init = mod_simple_vhost_init;
p->set_defaults = mod_simple_vhost_set_defaults;
p->handle_docroot = mod_simple_vhost_docroot;
p->cleanup = mod_simple_vhost_free;
return 0;
}