1 files changed, 340 insertions, 0 deletions

diff --git a/data/lighttpd/lighttpd-1.4.53/src/mod_rewrite.c b/data/lighttpd/lighttpd-1.4.53/src/mod_rewrite.c
new file mode 100644
index 000000000..1280d9784
--- /dev/null
+++ b/data/lighttpd/lighttpd-1.4.53/src/mod_rewrite.c
@@ -0,0 +1,340 @@
+#include "first.h"
+
+#include "base.h"
+#include "keyvalue.h"
+#include "log.h"
+#include "buffer.h"
+#include "burl.h"
+
+#include "plugin.h"
+#include "stat_cache.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+typedef struct {
+	pcre_keyvalue_buffer *rewrite;
+	pcre_keyvalue_buffer *rewrite_NF;
+	data_config *context, *context_NF; /* to which apply me */
+	int rewrite_repeat_idx, rewrite_NF_repeat_idx;
+} plugin_config;
+
+typedef struct {
+	enum { REWRITE_STATE_UNSET, REWRITE_STATE_FINISHED} state;
+	int loops;
+} handler_ctx;
+
+typedef struct {
+	PLUGIN_DATA;
+	plugin_config **config_storage;
+	plugin_config conf;
+} plugin_data;
+
+static handler_ctx * handler_ctx_init(void) {
+	handler_ctx * hctx;
+
+	hctx = calloc(1, sizeof(*hctx));
+
+	hctx->state = REWRITE_STATE_UNSET;
+	hctx->loops = 0;
+
+	return hctx;
+}
+
+static void handler_ctx_free(handler_ctx *hctx) {
+	free(hctx);
+}
+
+INIT_FUNC(mod_rewrite_init) {
+	return calloc(1, sizeof(plugin_data));
+}
+
+FREE_FUNC(mod_rewrite_free) {
+	plugin_data *p = p_d;
+	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;
+			pcre_keyvalue_buffer_free(s->rewrite);
+			pcre_keyvalue_buffer_free(s->rewrite_NF);
+			free(s);
+		}
+		free(p->config_storage);
+	}
+
+	free(p);
+	return HANDLER_GO_ON;
+}
+
+static int parse_config_entry(server *srv, array *ca, pcre_keyvalue_buffer *kvb, const char *option, size_t olen) {
+	data_unset *du;
+
+	if (NULL != (du = array_get_element_klen(ca, option, olen))) {
+		data_array *da;
+		size_t j;
+
+		da = (data_array *)du;
+
+		if (du->type != TYPE_ARRAY || !array_is_kvstring(da->value)) {
+			log_error_write(srv, __FILE__, __LINE__, "SSS",
+					"unexpected value for ", option, "; expected list of \"regex\" => \"subst\"");
+			return HANDLER_ERROR;
+		}
+
+		for (j = 0; j < da->value->used; j++) {
+			data_string *ds = (data_string *)da->value->data[j];
+			if (srv->srvconf.http_url_normalize) {
+				pcre_keyvalue_burl_normalize_key(ds->key, srv->tmp_buf);
+				pcre_keyvalue_burl_normalize_value(ds->value, srv->tmp_buf);
+			}
+			if (0 != pcre_keyvalue_buffer_append(srv, kvb, ds->key, ds->value)) {
+				log_error_write(srv, __FILE__, __LINE__, "sb",
+						"pcre-compile failed for", ds->key);
+				return HANDLER_ERROR;
+			}
+		}
+	}
+
+	return 0;
+}
+
+SETDEFAULTS_FUNC(mod_rewrite_set_defaults) {
+	size_t i = 0;
+	config_values_t cv[] = {
+		{ "url.rewrite-repeat",        NULL, T_CONFIG_LOCAL, T_CONFIG_SCOPE_CONNECTION }, /* 0 */
+		{ "url.rewrite-once",          NULL, T_CONFIG_LOCAL, T_CONFIG_SCOPE_CONNECTION }, /* 1 */
+
+		/* these functions only rewrite if the target is not already in the filestore
+		 *
+		 * url.rewrite-repeat-if-not-file is the equivalent of url.rewrite-repeat
+		 * url.rewrite-if-not-file is the equivalent of url.rewrite-once
+		 *
+		 */
+		{ "url.rewrite-repeat-if-not-file", NULL, T_CONFIG_LOCAL, T_CONFIG_SCOPE_CONNECTION }, /* 2 */
+		{ "url.rewrite-if-not-file",        NULL, T_CONFIG_LOCAL, T_CONFIG_SCOPE_CONNECTION }, /* 3 */
+
+		/* old names, still supported
+		 *
+		 * url.rewrite remapped to url.rewrite-once
+		 * url.rewrite-final    is url.rewrite-once
+		 *
+		 */
+		{ "url.rewrite",               NULL, T_CONFIG_LOCAL, T_CONFIG_SCOPE_CONNECTION }, /* 4 */
+		{ "url.rewrite-final",         NULL, T_CONFIG_LOCAL, T_CONFIG_SCOPE_CONNECTION }, /* 5 */
+		{ NULL,                        NULL, T_CONFIG_UNSET, T_CONFIG_SCOPE_UNSET }
+	};
+
+	plugin_data *p = p_d;
+
+	if (!p) return HANDLER_ERROR;
+
+	/* 0 */
+	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->rewrite = pcre_keyvalue_buffer_init();
+		s->rewrite_NF = pcre_keyvalue_buffer_init();
+		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;
+		}
+
+		parse_config_entry(srv, config->value, s->rewrite, CONST_STR_LEN("url.rewrite-once"));
+		parse_config_entry(srv, config->value, s->rewrite, CONST_STR_LEN("url.rewrite-final"));
+		parse_config_entry(srv, config->value, s->rewrite_NF, CONST_STR_LEN("url.rewrite-if-not-file"));
+		s->rewrite_NF_repeat_idx = (int)s->rewrite_NF->used;
+		parse_config_entry(srv, config->value, s->rewrite_NF, CONST_STR_LEN("url.rewrite-repeat-if-not-file"));
+		parse_config_entry(srv, config->value, s->rewrite, CONST_STR_LEN("url.rewrite"));
+		s->rewrite_repeat_idx = (int)s->rewrite->used;
+		parse_config_entry(srv, config->value, s->rewrite, CONST_STR_LEN("url.rewrite-repeat"));
+	}
+
+	return HANDLER_GO_ON;
+}
+
+#define PATCH(x) \
+	p->conf.x = s->x;
+static int mod_rewrite_patch_connection(server *srv, connection *con, plugin_data *p) {
+	size_t i, j;
+	plugin_config *s = p->config_storage[0];
+
+	PATCH(rewrite);
+	PATCH(rewrite_NF);
+	p->conf.context = NULL;
+	p->conf.context_NF = NULL;
+	PATCH(rewrite_repeat_idx);
+	PATCH(rewrite_NF_repeat_idx);
+
+	/* 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("url.rewrite"))) {
+				PATCH(rewrite);
+				p->conf.context = dc;
+				PATCH(rewrite_repeat_idx);
+			} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("url.rewrite-once"))) {
+				PATCH(rewrite);
+				p->conf.context = dc;
+				PATCH(rewrite_repeat_idx);
+			} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("url.rewrite-repeat"))) {
+				PATCH(rewrite);
+				p->conf.context = dc;
+				PATCH(rewrite_repeat_idx);
+			} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("url.rewrite-if-not-file"))) {
+				PATCH(rewrite_NF);
+				p->conf.context_NF = dc;
+				PATCH(rewrite_NF_repeat_idx);
+			} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("url.rewrite-repeat-if-not-file"))) {
+				PATCH(rewrite_NF);
+				p->conf.context_NF = dc;
+				PATCH(rewrite_NF_repeat_idx);
+			} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("url.rewrite-final"))) {
+				PATCH(rewrite);
+				p->conf.context = dc;
+				PATCH(rewrite_repeat_idx);
+			}
+		}
+	}
+
+	return 0;
+}
+
+URIHANDLER_FUNC(mod_rewrite_con_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;
+}
+
+static handler_t process_rewrite_rules(server *srv, connection *con, plugin_data *p, pcre_keyvalue_buffer *kvb, int repeat_idx) {
+	handler_ctx *hctx;
+	struct burl_parts_t burl;
+	pcre_keyvalue_ctx ctx;
+	handler_t rc;
+
+	if (con->plugin_ctx[p->id]) {
+		hctx = con->plugin_ctx[p->id];
+
+		if (hctx->loops++ > 100) {
+			data_config *dc = p->conf.context;
+			if (NULL == dc) {
+				log_error_write(srv, __FILE__, __LINE__,  "s",
+						"ENDLESS LOOP IN rewrite-rule DETECTED ... aborting request");
+				return HANDLER_ERROR;
+			}
+			log_error_write(srv, __FILE__, __LINE__,  "SbbSBS",
+					"ENDLESS LOOP IN rewrite-rule DETECTED ... aborting request, perhaps you want to use url.rewrite-once instead of url.rewrite-repeat ($", dc->comp_key, dc->op, "\"", dc->string, "\")");
+
+			return HANDLER_ERROR;
+		}
+
+		if (hctx->state == REWRITE_STATE_FINISHED) return HANDLER_GO_ON;
+	}
+
+	ctx.cache = p->conf.context ? &con->cond_cache[p->conf.context->context_ndx] : NULL;
+	ctx.burl = &burl;
+	burl.scheme    = con->uri.scheme;
+	burl.authority = con->uri.authority;
+	burl.port      = sock_addr_get_port(&con->srv_socket->addr);
+	burl.path      = con->uri.path_raw;
+	burl.query     = con->uri.query;
+	if (buffer_string_is_empty(burl.authority))
+		burl.authority = con->server_name;
+
+	rc = pcre_keyvalue_buffer_process(kvb, &ctx, con->request.uri, srv->tmp_buf);
+	if (HANDLER_FINISHED == rc && !buffer_is_empty(srv->tmp_buf) && srv->tmp_buf->ptr[0] == '/') {
+		buffer_copy_buffer(con->request.uri, srv->tmp_buf);
+		if (con->plugin_ctx[p->id] == NULL) {
+			hctx = handler_ctx_init();
+			con->plugin_ctx[p->id] = hctx;
+		} else {
+			hctx = con->plugin_ctx[p->id];
+		}
+		if (ctx.m < repeat_idx) hctx->state = REWRITE_STATE_FINISHED;
+		buffer_reset(con->physical.path);
+		rc = HANDLER_COMEBACK;
+	}
+	else if (HANDLER_FINISHED == rc) {
+		rc = HANDLER_ERROR;
+		log_error_write(srv, __FILE__, __LINE__, "sb",
+				"mod_rewrite invalid result (not beginning with '/') while processing uri:",
+				con->request.uri);
+	}
+	else if (HANDLER_ERROR == rc) {
+		log_error_write(srv, __FILE__, __LINE__, "sb",
+				"pcre_exec() error while processing uri:",
+				con->request.uri);
+	}
+	return rc;
+}
+
+URIHANDLER_FUNC(mod_rewrite_physical) {
+	plugin_data *p = p_d;
+	stat_cache_entry *sce;
+
+	if (con->mode != DIRECT) return HANDLER_GO_ON;
+
+	mod_rewrite_patch_connection(srv, con, p);
+	p->conf.context = p->conf.context_NF;
+	if (!p->conf.rewrite_NF->used) return HANDLER_GO_ON;
+
+	/* skip if physical.path is a regular file */
+	sce = NULL;
+	if (HANDLER_ERROR != stat_cache_get_entry(srv, con, con->physical.path, &sce)) {
+		if (S_ISREG(sce->st.st_mode)) return HANDLER_GO_ON;
+	}
+
+	return process_rewrite_rules(srv, con, p, p->conf.rewrite_NF, p->conf.rewrite_NF_repeat_idx);
+}
+
+URIHANDLER_FUNC(mod_rewrite_uri_handler) {
+	plugin_data *p = p_d;
+
+	mod_rewrite_patch_connection(srv, con, p);
+	if (!p->conf.rewrite->used) return HANDLER_GO_ON;
+
+	return process_rewrite_rules(srv, con, p, p->conf.rewrite, p->conf.rewrite_repeat_idx);
+}
+
+int mod_rewrite_plugin_init(plugin *p);
+int mod_rewrite_plugin_init(plugin *p) {
+	p->version     = LIGHTTPD_VERSION_ID;
+	p->name        = buffer_init_string("rewrite");
+
+	p->init        = mod_rewrite_init;
+	/* it has to stay _raw as we are matching on uri + querystring
+	 */
+
+	p->handle_uri_raw = mod_rewrite_uri_handler;
+	p->handle_physical = mod_rewrite_physical;
+	p->cleanup     = mod_rewrite_free;
+	p->connection_reset = mod_rewrite_con_reset;
+	p->set_defaults = mod_rewrite_set_defaults;
+
+	p->data        = NULL;
+
+	return 0;
+}