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>
#include <errno.h>
typedef struct {
buffer *server_root;
buffer *default_host;
buffer *document_root;
buffer *docroot_cache_key;
buffer *docroot_cache_value;
buffer *docroot_cache_servername;
unsigned short debug;
} plugin_config;
typedef struct {
PLUGIN_DATA;
buffer *doc_root;
plugin_config **config_storage;
plugin_config conf;
} plugin_data;
INIT_FUNC(mod_simple_vhost_init) {
plugin_data *p;
p = calloc(1, sizeof(*p));
p->doc_root = buffer_init();
return p;
}
FREE_FUNC(mod_simple_vhost_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;
buffer_free(s->document_root);
buffer_free(s->default_host);
buffer_free(s->server_root);
buffer_free(s->docroot_cache_key);
buffer_free(s->docroot_cache_value);
buffer_free(s->docroot_cache_servername);
free(s);
}
free(p->config_storage);
}
buffer_free(p->doc_root);
free(p);
return HANDLER_GO_ON;
}
SETDEFAULTS_FUNC(mod_simple_vhost_set_defaults) {
plugin_data *p = p_d;
size_t i;
config_values_t cv[] = {
{ "simple-vhost.server-root", NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION },
{ "simple-vhost.default-host", NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION },
{ "simple-vhost.document-root", NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION },
{ "simple-vhost.debug", NULL, T_CONFIG_SHORT, T_CONFIG_SCOPE_CONNECTION },
{ 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->server_root = buffer_init();
s->default_host = buffer_init();
s->document_root = buffer_init();
s->docroot_cache_key = buffer_init();
s->docroot_cache_value = buffer_init();
s->docroot_cache_servername = buffer_init();
s->debug = 0;
cv[0].destination = s->server_root;
cv[1].destination = s->default_host;
cv[2].destination = s->document_root;
cv[3].destination = &(s->debug);
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;
}
}
return HANDLER_GO_ON;
}
static int build_doc_root(server *srv, connection *con, plugin_data *p, buffer *out, buffer *host) {
stat_cache_entry *sce = NULL;
force_assert(!buffer_string_is_empty(p->conf.server_root));
buffer_string_prepare_copy(out, 127);
buffer_copy_buffer(out, p->conf.server_root);
if (!buffer_string_is_empty(host)) {
/* a hostname has to start with a alpha-numerical character
* and must not contain a slash "/"
*/
char *dp;
buffer_append_slash(out);
if (NULL == (dp = strchr(host->ptr, ':'))) {
buffer_append_string_buffer(out, host);
} else {
buffer_append_string_len(out, host->ptr, dp - host->ptr);
}
}
buffer_append_slash(out);
if (buffer_string_length(p->conf.document_root) > 1 && p->conf.document_root->ptr[0] == '/') {
buffer_append_string_len(out, p->conf.document_root->ptr + 1, buffer_string_length(p->conf.document_root) - 1);
} else {
buffer_append_string_buffer(out, p->conf.document_root);
buffer_append_slash(out);
}
if (HANDLER_ERROR == stat_cache_get_entry(srv, con, out, &sce)) {
if (p->conf.debug) {
log_error_write(srv, __FILE__, __LINE__, "sb",
strerror(errno), out);
}
return -1;
} else if (!S_ISDIR(sce->st.st_mode)) {
return -1;
}
return 0;
}
#define PATCH(x) \
p->conf.x = s->x;
static int mod_simple_vhost_patch_connection(server *srv, connection *con, plugin_data *p) {
size_t i, j;
plugin_config *s = p->config_storage[0];
PATCH(server_root);
PATCH(default_host);
PATCH(document_root);
PATCH(docroot_cache_key);
PATCH(docroot_cache_value);
PATCH(docroot_cache_servername);
PATCH(debug);
/* 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("simple-vhost.server-root"))) {
PATCH(server_root);
PATCH(docroot_cache_key);
PATCH(docroot_cache_value);
PATCH(docroot_cache_servername);
} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("simple-vhost.default-host"))) {
PATCH(default_host);
} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("simple-vhost.document-root"))) {
PATCH(document_root);
} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("simple-vhost.debug"))) {
PATCH(debug);
}
}
}
return 0;
}
#undef PATCH
static handler_t mod_simple_vhost_docroot(server *srv, connection *con, void *p_data) {
plugin_data *p = p_data;
/*
* cache the last successfull translation from hostname (authority) to docroot
* - this saves us a stat() call
*
*/
mod_simple_vhost_patch_connection(srv, con, p);
/* build_doc_root() requires a server_root; skip module if simple-vhost.server-root is not set
* or set to an empty string (especially don't cache any results!)
*/
if (buffer_string_is_empty(p->conf.server_root)) return HANDLER_GO_ON;
if (!buffer_string_is_empty(p->conf.docroot_cache_key) &&
!buffer_string_is_empty(con->uri.authority) &&
buffer_is_equal(p->conf.docroot_cache_key, con->uri.authority)) {
/* cache hit */
buffer_copy_buffer(con->server_name, p->conf.docroot_cache_servername);
buffer_copy_buffer(con->physical.doc_root, p->conf.docroot_cache_value);
} else {
/* build document-root */
if (buffer_string_is_empty(con->uri.authority) ||
build_doc_root(srv, con, p, p->doc_root, con->uri.authority)) {
/* not found, fallback the default-host */
if (0 == build_doc_root(srv, con, p,
p->doc_root,
p->conf.default_host)) {
/* default host worked */
buffer_copy_buffer(con->server_name, p->conf.default_host);
buffer_copy_buffer(con->physical.doc_root, p->doc_root);
/* do not cache default host */
}
return HANDLER_GO_ON;
}
/* found host */
buffer_copy_buffer(con->server_name, con->uri.authority);
buffer_copy_buffer(con->physical.doc_root, p->doc_root);
/* copy to cache */
buffer_copy_buffer(p->conf.docroot_cache_key, con->uri.authority);
buffer_copy_buffer(p->conf.docroot_cache_value, p->doc_root);
buffer_copy_buffer(p->conf.docroot_cache_servername, con->server_name);
}
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 = buffer_init_string("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;
p->data = NULL;
return 0;
}