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Diffstat (limited to 'data/lighttpd/lighttpd-1.4.53/src/mod_expire.c')
-rw-r--r--data/lighttpd/lighttpd-1.4.53/src/mod_expire.c424
1 files changed, 424 insertions, 0 deletions
diff --git a/data/lighttpd/lighttpd-1.4.53/src/mod_expire.c b/data/lighttpd/lighttpd-1.4.53/src/mod_expire.c
new file mode 100644
index 000000000..d0f771bf8
--- /dev/null
+++ b/data/lighttpd/lighttpd-1.4.53/src/mod_expire.c
@@ -0,0 +1,424 @@
+#include "first.h"
+
+#include "base.h"
+#include "log.h"
+#include "buffer.h"
+#include "http_header.h"
+
+#include "plugin.h"
+#include "stat_cache.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+/**
+ * this is a expire module for a lighttpd
+ *
+ * set 'Expires:' HTTP Headers on demand
+ */
+
+
+
+/* plugin config for all request/connections */
+
+typedef struct {
+ array *expire_url;
+ array *expire_mimetypes;
+} plugin_config;
+
+typedef struct {
+ PLUGIN_DATA;
+
+ buffer *expire_tstmp;
+
+ plugin_config **config_storage;
+
+ plugin_config conf;
+} plugin_data;
+
+/* init the plugin data */
+INIT_FUNC(mod_expire_init) {
+ plugin_data *p;
+
+ p = calloc(1, sizeof(*p));
+
+ p->expire_tstmp = buffer_init();
+
+ buffer_string_prepare_copy(p->expire_tstmp, 255);
+
+ return p;
+}
+
+/* detroy the plugin data */
+FREE_FUNC(mod_expire_free) {
+ plugin_data *p = p_d;
+
+ UNUSED(srv);
+
+ if (!p) return HANDLER_GO_ON;
+
+ buffer_free(p->expire_tstmp);
+
+ 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->expire_url);
+ array_free(s->expire_mimetypes);
+ free(s);
+ }
+ free(p->config_storage);
+ }
+
+ free(p);
+
+ return HANDLER_GO_ON;
+}
+
+static int mod_expire_get_offset(server *srv, plugin_data *p, buffer *expire, time_t *offset) {
+ char *ts;
+ int type = -1;
+ time_t retts = 0;
+
+ UNUSED(p);
+
+ /*
+ * parse
+ *
+ * '(access|now|modification) [plus] {<num> <type>}*'
+ *
+ * e.g. 'access 1 years'
+ */
+
+ if (buffer_string_is_empty(expire)) {
+ log_error_write(srv, __FILE__, __LINE__, "s",
+ "empty:");
+ return -1;
+ }
+
+ ts = expire->ptr;
+
+ if (0 == strncmp(ts, "access ", 7)) {
+ type = 0;
+ ts += 7;
+ } else if (0 == strncmp(ts, "now ", 4)) {
+ type = 0;
+ ts += 4;
+ } else if (0 == strncmp(ts, "modification ", 13)) {
+ type = 1;
+ ts += 13;
+ } else {
+ /* invalid type-prefix */
+ log_error_write(srv, __FILE__, __LINE__, "ss",
+ "invalid <base>:", ts);
+ return -1;
+ }
+
+ if (0 == strncmp(ts, "plus ", 5)) {
+ /* skip the optional plus */
+ ts += 5;
+ }
+
+ /* the rest is just <number> (years|months|weeks|days|hours|minutes|seconds) */
+ while (1) {
+ char *space, *err;
+ int num;
+
+ if (NULL == (space = strchr(ts, ' '))) {
+ log_error_write(srv, __FILE__, __LINE__, "ss",
+ "missing space after <num>:", ts);
+ return -1;
+ }
+
+ num = strtol(ts, &err, 10);
+ if (*err != ' ') {
+ log_error_write(srv, __FILE__, __LINE__, "ss",
+ "missing <type> after <num>:", ts);
+ return -1;
+ }
+
+ ts = space + 1;
+
+ if (NULL != (space = strchr(ts, ' '))) {
+ int slen;
+ /* */
+
+ slen = space - ts;
+
+ if (slen == 5 &&
+ 0 == strncmp(ts, "years", slen)) {
+ num *= 60 * 60 * 24 * 30 * 12;
+ } else if (slen == 6 &&
+ 0 == strncmp(ts, "months", slen)) {
+ num *= 60 * 60 * 24 * 30;
+ } else if (slen == 5 &&
+ 0 == strncmp(ts, "weeks", slen)) {
+ num *= 60 * 60 * 24 * 7;
+ } else if (slen == 4 &&
+ 0 == strncmp(ts, "days", slen)) {
+ num *= 60 * 60 * 24;
+ } else if (slen == 5 &&
+ 0 == strncmp(ts, "hours", slen)) {
+ num *= 60 * 60;
+ } else if (slen == 7 &&
+ 0 == strncmp(ts, "minutes", slen)) {
+ num *= 60;
+ } else if (slen == 7 &&
+ 0 == strncmp(ts, "seconds", slen)) {
+ num *= 1;
+ } else {
+ log_error_write(srv, __FILE__, __LINE__, "ss",
+ "unknown type:", ts);
+ return -1;
+ }
+
+ retts += num;
+
+ ts = space + 1;
+ } else {
+ if (0 == strcmp(ts, "years")) {
+ num *= 60 * 60 * 24 * 30 * 12;
+ } else if (0 == strcmp(ts, "months")) {
+ num *= 60 * 60 * 24 * 30;
+ } else if (0 == strcmp(ts, "weeks")) {
+ num *= 60 * 60 * 24 * 7;
+ } else if (0 == strcmp(ts, "days")) {
+ num *= 60 * 60 * 24;
+ } else if (0 == strcmp(ts, "hours")) {
+ num *= 60 * 60;
+ } else if (0 == strcmp(ts, "minutes")) {
+ num *= 60;
+ } else if (0 == strcmp(ts, "seconds")) {
+ num *= 1;
+ } else {
+ log_error_write(srv, __FILE__, __LINE__, "ss",
+ "unknown type:", ts);
+ return -1;
+ }
+
+ retts += num;
+
+ break;
+ }
+ }
+
+ if (offset != NULL) *offset = retts;
+
+ return type;
+}
+
+
+/* handle plugin config and check values */
+
+SETDEFAULTS_FUNC(mod_expire_set_defaults) {
+ plugin_data *p = p_d;
+ size_t i = 0, k;
+
+ config_values_t cv[] = {
+ { "expire.url", NULL, T_CONFIG_ARRAY, T_CONFIG_SCOPE_CONNECTION }, /* 0 */
+ { "expire.mimetypes", NULL, T_CONFIG_ARRAY, T_CONFIG_SCOPE_CONNECTION }, /* 1 */
+ { 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->expire_url = array_init();
+ s->expire_mimetypes = array_init();
+
+ cv[0].destination = s->expire_url;
+ cv[1].destination = s->expire_mimetypes;
+
+ 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->expire_url)) {
+ log_error_write(srv, __FILE__, __LINE__, "s",
+ "unexpected value for expire.url; expected list of \"urlpath\" => \"expiration\"");
+ return HANDLER_ERROR;
+ }
+
+ for (k = 0; k < s->expire_url->used; k++) {
+ data_string *ds = (data_string *)s->expire_url->data[k];
+
+ /* parse lines */
+ if (-1 == mod_expire_get_offset(srv, p, ds->value, NULL)) {
+ log_error_write(srv, __FILE__, __LINE__, "sb",
+ "parsing expire.url failed:", ds->value);
+ return HANDLER_ERROR;
+ }
+ }
+
+ if (!array_is_kvstring(s->expire_mimetypes)) {
+ log_error_write(srv, __FILE__, __LINE__, "s",
+ "unexpected value for expire.mimetypes; expected list of \"mimetype\" => \"expiration\"");
+ return HANDLER_ERROR;
+ }
+
+ for (k = 0; k < s->expire_mimetypes->used; k++) {
+ data_string *ds = (data_string *)s->expire_mimetypes->data[k];
+ size_t klen = buffer_string_length(ds->key);
+
+ /*(omit trailing '*', if present, from prefix match)*/
+ /*(not usually a good idea to modify array keys
+ * since doing so might break array_get_element_klen() search,
+ * but array use in this module only walks array)*/
+ if (klen && ds->key->ptr[klen-1] == '*') buffer_string_set_length(ds->key, klen-1);
+
+ /* parse lines */
+ if (-1 == mod_expire_get_offset(srv, p, ds->value, NULL)) {
+ log_error_write(srv, __FILE__, __LINE__, "sb",
+ "parsing expire.mimetypes failed:", ds->value);
+ return HANDLER_ERROR;
+ }
+ }
+ }
+
+
+ return HANDLER_GO_ON;
+}
+
+#define PATCH(x) \
+ p->conf.x = s->x;
+static int mod_expire_patch_connection(server *srv, connection *con, plugin_data *p) {
+ size_t i, j;
+ plugin_config *s = p->config_storage[0];
+
+ PATCH(expire_url);
+ PATCH(expire_mimetypes);
+
+ /* 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("expire.url"))) {
+ PATCH(expire_url);
+ } else if (buffer_is_equal_string(du->key, CONST_STR_LEN("expire.mimetypes"))) {
+ PATCH(expire_mimetypes);
+ }
+ }
+ }
+
+ return 0;
+}
+#undef PATCH
+
+CONNECTION_FUNC(mod_expire_handler) {
+ plugin_data *p = p_d;
+ buffer *vb;
+ data_string *ds;
+
+ /* Add caching headers only to http_status 200 OK or 206 Partial Content */
+ if (con->http_status != 200 && con->http_status != 206) return HANDLER_GO_ON;
+ /* Add caching headers only to GET or HEAD requests */
+ if ( con->request.http_method != HTTP_METHOD_GET
+ && con->request.http_method != HTTP_METHOD_HEAD) return HANDLER_GO_ON;
+ /* Add caching headers only if not already present */
+ vb = http_header_response_get(con, HTTP_HEADER_CACHE_CONTROL, CONST_STR_LEN("Cache-Control"));
+ if (NULL != vb) return HANDLER_GO_ON;
+
+ if (buffer_is_empty(con->uri.path)) return HANDLER_GO_ON;
+
+ mod_expire_patch_connection(srv, con, p);
+
+ /* check expire.url */
+ ds = (data_string *)array_match_key_prefix(p->conf.expire_url, con->uri.path);
+ if (NULL != ds) {
+ vb = ds->value;
+ }
+ else {
+ /* check expire.mimetypes (if no match with expire.url) */
+ vb = http_header_response_get(con, HTTP_HEADER_CONTENT_TYPE, CONST_STR_LEN("Content-Type"));
+ ds = (NULL != vb)
+ ? (data_string *)array_match_key_prefix(p->conf.expire_mimetypes, vb)
+ : (data_string *)array_get_element_klen(p->conf.expire_mimetypes, CONST_STR_LEN(""));
+ if (NULL == ds) return HANDLER_GO_ON;
+ vb = ds->value;
+ }
+
+ if (NULL != vb) {
+ time_t ts, expires;
+ stat_cache_entry *sce = NULL;
+
+ /* if stat fails => sce == NULL, ignore return value */
+ (void) stat_cache_get_entry(srv, con, con->physical.path, &sce);
+
+ switch(mod_expire_get_offset(srv, p, vb, &ts)) {
+ case 0:
+ /* access */
+ expires = (ts + srv->cur_ts);
+ break;
+ case 1:
+ /* modification */
+
+ /* can't set modification based expire header if
+ * mtime is not available
+ */
+ if (NULL == sce) return HANDLER_GO_ON;
+
+ expires = (ts + sce->st.st_mtime);
+ break;
+ default:
+ /* -1 is handled at parse-time */
+ return HANDLER_ERROR;
+ }
+
+ /* expires should be at least srv->cur_ts */
+ if (expires < srv->cur_ts) expires = srv->cur_ts;
+
+ buffer_clear(p->expire_tstmp);
+ buffer_append_strftime(p->expire_tstmp, "%a, %d %b %Y %H:%M:%S GMT", gmtime(&(expires)));
+
+ /* HTTP/1.0 */
+ http_header_response_set(con, HTTP_HEADER_OTHER, CONST_STR_LEN("Expires"), CONST_BUF_LEN(p->expire_tstmp));
+
+ /* HTTP/1.1 */
+ buffer_copy_string_len(p->expire_tstmp, CONST_STR_LEN("max-age="));
+ buffer_append_int(p->expire_tstmp, expires - srv->cur_ts); /* as expires >= srv->cur_ts the difference is >= 0 */
+
+ http_header_response_set(con, HTTP_HEADER_CACHE_CONTROL, CONST_STR_LEN("Cache-Control"), CONST_BUF_LEN(p->expire_tstmp));
+
+ return HANDLER_GO_ON;
+ }
+
+ /* not found */
+ return HANDLER_GO_ON;
+}
+
+/* this function is called at dlopen() time and inits the callbacks */
+
+int mod_expire_plugin_init(plugin *p);
+int mod_expire_plugin_init(plugin *p) {
+ p->version = LIGHTTPD_VERSION_ID;
+ p->name = buffer_init_string("expire");
+
+ p->init = mod_expire_init;
+ p->handle_response_start = mod_expire_handler;
+ p->set_defaults = mod_expire_set_defaults;
+ p->cleanup = mod_expire_free;
+
+ p->data = NULL;
+
+ return 0;
+}
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