Imported Upstream version 1.4.10upstream/1.4.10

1 files changed, 199 insertions, 0 deletions

diff --git a/src/mod_alias.c b/src/mod_alias.c
new file mode 100644
index 0000000..23570e4
--- /dev/null
+++ b/src/mod_alias.c
@@ -0,0 +1,199 @@
+#include <ctype.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+#include "base.h"
+#include "log.h"
+#include "buffer.h"
+
+#include "plugin.h"
+
+/* plugin config for all request/connections */
+typedef struct {
+	array *alias;
+} plugin_config;
+
+typedef struct {
+	PLUGIN_DATA;
+	
+	plugin_config **config_storage;
+	
+	plugin_config conf; 
+} plugin_data;
+
+/* init the plugin data */
+INIT_FUNC(mod_alias_init) {
+	plugin_data *p;
+	
+	p = calloc(1, sizeof(*p));
+	
+	
+	
+	return p;
+}
+
+/* detroy the plugin data */
+FREE_FUNC(mod_alias_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];
+			
+			array_free(s->alias);
+			
+			free(s);
+		}
+		free(p->config_storage);
+	}
+	
+	free(p);
+	
+	return HANDLER_GO_ON;
+}
+
+/* handle plugin config and check values */
+
+SETDEFAULTS_FUNC(mod_alias_set_defaults) {
+	plugin_data *p = p_d;
+	size_t i = 0;
+	
+	config_values_t cv[] = { 
+		{ "alias.url",                  NULL, T_CONFIG_ARRAY, T_CONFIG_SCOPE_CONNECTION },       /* 0 */
+		{ NULL,                         NULL, T_CONFIG_UNSET,  T_CONFIG_SCOPE_UNSET }
+	};
+	
+	if (!p) return HANDLER_ERROR;
+	
+	p->config_storage = calloc(1, srv->config_context->used * sizeof(specific_config *));
+	
+	for (i = 0; i < srv->config_context->used; i++) {
+		plugin_config *s;
+		
+		s = calloc(1, sizeof(plugin_config));
+		s->alias = array_init();	
+		cv[0].destination = s->alias;
+		
+		p->config_storage[i] = s;
+		
+		if (0 != config_insert_values_global(srv, ((data_config *)srv->config_context->data[i])->value, cv)) {
+			return HANDLER_ERROR;
+		}
+		if (s->alias->used >= 2) {
+			const array *a = s->alias;
+			size_t j, k;
+
+			for (j = 0; j < a->used; j ++) {
+				const buffer *prefix = a->data[a->sorted[j]]->key;
+				for (k = j + 1; k < a->used; k ++) {
+					const buffer *key = a->data[a->sorted[k]]->key;
+
+					if (key->used < prefix->used) {
+						break;
+					}
+					if (memcmp(key->ptr, prefix->ptr, prefix->used - 1) != 0) {
+						break;
+					}
+					/* ok, they have same prefix. check position */
+					if (a->sorted[j] < a->sorted[k]) {
+						fprintf(stderr, "url.alias: `%s' will never match as `%s' matched first\n",
+								key->ptr,
+								prefix->ptr);
+						return HANDLER_ERROR;
+					}
+				}
+			}
+		}
+	}
+	
+	return HANDLER_GO_ON;
+}
+
+#define PATCH(x) \
+	p->conf.x = s->x;
+static int mod_alias_patch_connection(server *srv, connection *con, plugin_data *p) {
+	size_t i, j;
+	plugin_config *s = p->config_storage[0];
+	
+	PATCH(alias);
+	
+	/* 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("alias.url"))) {
+				PATCH(alias);
+			}
+		}
+	}
+	
+	return 0;
+}
+#undef PATCH
+
+PHYSICALPATH_FUNC(mod_alias_physical_handler) {
+	plugin_data *p = p_d;
+	int uri_len, basedir_len;
+	char *uri_ptr;
+	size_t k;
+	
+	if (con->physical.path->used == 0) return HANDLER_GO_ON;
+	
+	mod_alias_patch_connection(srv, con, p);
+	
+	/* not to include the tailing slash */
+	basedir_len = (con->physical.basedir->used - 1) - 1;
+	uri_len = con->physical.path->used - 1 - basedir_len;
+	uri_ptr = con->physical.path->ptr + basedir_len;
+	
+	for (k = 0; k < p->conf.alias->used; k++) {
+		data_string *ds = (data_string *)p->conf.alias->data[k];
+		int alias_len = ds->key->used - 1;
+		
+		if (alias_len > uri_len) continue;
+		if (ds->key->used == 0) continue;
+		
+		if (0 == strncmp(uri_ptr, ds->key->ptr, alias_len)) {
+			/* matched */
+			
+			buffer_copy_string_buffer(con->physical.basedir, ds->value);
+			buffer_copy_string_buffer(srv->tmp_buf, ds->value);
+			buffer_append_string(srv->tmp_buf, uri_ptr + alias_len);
+			buffer_copy_string_buffer(con->physical.path, srv->tmp_buf);
+			
+			return HANDLER_GO_ON;
+		}
+	}
+	
+	/* not found */
+	return HANDLER_GO_ON;
+}
+
+/* this function is called at dlopen() time and inits the callbacks */
+
+int mod_alias_plugin_init(plugin *p) {
+	p->version     = LIGHTTPD_VERSION_ID;
+	p->name        = buffer_init_string("alias");
+	
+	p->init           = mod_alias_init;
+	p->handle_physical= mod_alias_physical_handler;
+	p->set_defaults   = mod_alias_set_defaults;
+	p->cleanup        = mod_alias_free;
+	
+	p->data        = NULL;
+	
+	return 0;
+}