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 "http_header.h"
#include "plugin.h"
#include <stdlib.h>
#include <string.h>
/* plugin config for all request/connections */
typedef struct {
array *request_header;
array *set_request_header;
array *response_header;
array *set_response_header;
array *environment;
array *set_environment;
} plugin_config;
typedef struct {
PLUGIN_DATA;
plugin_config **config_storage;
plugin_config conf;
} plugin_data;
typedef struct {
int handled; /* make sure that we only apply the headers once */
plugin_config conf;
} handler_ctx;
static handler_ctx * handler_ctx_init(void) {
handler_ctx * hctx;
hctx = calloc(1, sizeof(*hctx));
hctx->handled = 0;
return hctx;
}
static void handler_ctx_free(handler_ctx *hctx) {
free(hctx);
}
/* init the plugin data */
INIT_FUNC(mod_setenv_init) {
plugin_data *p;
p = calloc(1, sizeof(*p));
return p;
}
/* detroy the plugin data */
FREE_FUNC(mod_setenv_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->request_header);
array_free(s->response_header);
array_free(s->environment);
array_free(s->set_request_header);
array_free(s->set_response_header);
array_free(s->set_environment);
free(s);
}
free(p->config_storage);
}
free(p);
return HANDLER_GO_ON;
}
/* handle plugin config and check values */
SETDEFAULTS_FUNC(mod_setenv_set_defaults) {
plugin_data *p = p_d;
size_t i = 0;
config_values_t cv[] = {
{ "setenv.add-request-header", NULL, T_CONFIG_ARRAY, T_CONFIG_SCOPE_CONNECTION }, /* 0 */
{ "setenv.add-response-header", NULL, T_CONFIG_ARRAY, T_CONFIG_SCOPE_CONNECTION }, /* 1 */
{ "setenv.add-environment", NULL, T_CONFIG_ARRAY, T_CONFIG_SCOPE_CONNECTION }, /* 2 */
{ "setenv.set-request-header", NULL, T_CONFIG_ARRAY, T_CONFIG_SCOPE_CONNECTION }, /* 3 */
{ "setenv.set-response-header", NULL, T_CONFIG_ARRAY, T_CONFIG_SCOPE_CONNECTION }, /* 4 */
{ "setenv.set-environment", NULL, T_CONFIG_ARRAY, T_CONFIG_SCOPE_CONNECTION }, /* 5 */
{ NULL, NULL, T_CONFIG_UNSET, T_CONFIG_SCOPE_UNSET }
};
if (!p) return HANDLER_ERROR;
p->config_storage = calloc(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->request_header = array_init();
s->response_header = array_init();
s->environment = array_init();
s->set_request_header = array_init();
s->set_response_header = array_init();
s->set_environment = array_init();
cv[0].destination = s->request_header;
cv[1].destination = s->response_header;
cv[2].destination = s->environment;
cv[3].destination = s->set_request_header;
cv[4].destination = s->set_response_header;
cv[5].destination = s->set_environment;
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_kvstring(s->request_header)
|| !array_is_kvstring(s->response_header)
|| !array_is_kvstring(s->environment)
|| !array_is_kvstring(s->set_request_header)
|| !array_is_kvstring(s->set_response_header)
|| !array_is_kvstring(s->set_environment)) {
log_error_write(srv, __FILE__, __LINE__, "s",
"unexpected value for setenv.xxxxxx; expected list of \"envvar\" => \"value\"");
return HANDLER_ERROR;
}
}
return HANDLER_GO_ON;
}
#define PATCH(x) \
p->conf.x = s->x;
static int mod_setenv_patch_connection(server *srv, connection *con, plugin_data *p) {
size_t i, j;
plugin_config *s = p->config_storage[0];
PATCH(request_header);
PATCH(set_request_header);
PATCH(response_header);
PATCH(set_response_header);
PATCH(environment);
PATCH(set_environment);
/* 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("setenv.add-request-header"))) {
PATCH(request_header);
} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("setenv.set-request-header"))) {
PATCH(set_request_header);
} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("setenv.add-response-header"))) {
PATCH(response_header);
} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("setenv.set-response-header"))) {
PATCH(set_response_header);
} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("setenv.add-environment"))) {
PATCH(environment);
} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("setenv.set-environment"))) {
PATCH(set_environment);
}
}
}
return 0;
}
#undef PATCH
URIHANDLER_FUNC(mod_setenv_uri_handler) {
plugin_data *p = p_d;
size_t k;
handler_ctx *hctx;
if (con->plugin_ctx[p->id]) {
hctx = con->plugin_ctx[p->id];
} else {
hctx = handler_ctx_init();
con->plugin_ctx[p->id] = hctx;
}
if (hctx->handled) {
return HANDLER_GO_ON;
}
hctx->handled = 1;
mod_setenv_patch_connection(srv, con, p);
memcpy(&hctx->conf, &p->conf, sizeof(plugin_config));
for (k = 0; k < p->conf.request_header->used; k++) {
data_string *ds = (data_string *)p->conf.request_header->data[k];
enum http_header_e id = http_header_hkey_get(CONST_BUF_LEN(ds->key));
http_header_request_append(con, id, CONST_BUF_LEN(ds->key), CONST_BUF_LEN(ds->value));
}
for (k = 0; k < hctx->conf.set_request_header->used; ++k) {
data_string *ds = (data_string *)hctx->conf.set_request_header->data[k];
enum http_header_e id = http_header_hkey_get(CONST_BUF_LEN(ds->key));
!buffer_string_is_empty(ds->value)
? http_header_request_set(con, id, CONST_BUF_LEN(ds->key), CONST_BUF_LEN(ds->value))
: http_header_request_unset(con, id, CONST_BUF_LEN(ds->key));
}
return HANDLER_GO_ON;
}
CONNECTION_FUNC(mod_setenv_handle_request_env) {
plugin_data *p = p_d;
handler_ctx *hctx = con->plugin_ctx[p->id];
if (NULL == hctx) return HANDLER_GO_ON;
if (hctx->handled > 1) return HANDLER_GO_ON;
hctx->handled = 2;
UNUSED(srv);
for (size_t k = 0; k < hctx->conf.environment->used; ++k) {
data_string *ds = (data_string *)hctx->conf.environment->data[k];
http_header_env_append(con, CONST_BUF_LEN(ds->key), CONST_BUF_LEN(ds->value));
}
for (size_t k = 0; k < hctx->conf.set_environment->used; ++k) {
data_string *ds = (data_string *)hctx->conf.set_environment->data[k];
http_header_env_set(con, CONST_BUF_LEN(ds->key), CONST_BUF_LEN(ds->value));
}
return HANDLER_GO_ON;
}
CONNECTION_FUNC(mod_setenv_handle_response_start) {
plugin_data *p = p_d;
handler_ctx *hctx = con->plugin_ctx[p->id];
if (NULL == hctx) return HANDLER_GO_ON;
UNUSED(srv);
for (size_t k = 0; k < hctx->conf.response_header->used; ++k) {
data_string *ds = (data_string *)hctx->conf.response_header->data[k];
enum http_header_e id = http_header_hkey_get(CONST_BUF_LEN(ds->key));
http_header_response_insert(con, id, CONST_BUF_LEN(ds->key), CONST_BUF_LEN(ds->value));
}
for (size_t k = 0; k < hctx->conf.set_response_header->used; ++k) {
data_string *ds = (data_string *)hctx->conf.set_response_header->data[k];
enum http_header_e id = http_header_hkey_get(CONST_BUF_LEN(ds->key));
!buffer_string_is_empty(ds->value)
? http_header_response_set(con, id, CONST_BUF_LEN(ds->key), CONST_BUF_LEN(ds->value))
: http_header_response_unset(con, id, CONST_BUF_LEN(ds->key));
}
return HANDLER_GO_ON;
}
CONNECTION_FUNC(mod_setenv_reset) {
plugin_data *p = p_d;
UNUSED(srv);
if (con->plugin_ctx[p->id]) {
handler_ctx_free(con->plugin_ctx[p->id]);
con->plugin_ctx[p->id] = NULL;
}
return HANDLER_GO_ON;
}
/* this function is called at dlopen() time and inits the callbacks */
int mod_setenv_plugin_init(plugin *p);
int mod_setenv_plugin_init(plugin *p) {
p->version = LIGHTTPD_VERSION_ID;
p->name = buffer_init_string("setenv");
p->init = mod_setenv_init;
p->handle_uri_clean = mod_setenv_uri_handler;
p->handle_request_env = mod_setenv_handle_request_env;
p->handle_response_start = mod_setenv_handle_response_start;
p->set_defaults = mod_setenv_set_defaults;
p->cleanup = mod_setenv_free;
p->connection_reset = mod_setenv_reset;
p->data = NULL;
return 0;
}