blob: c144b31c3a977955e99741f8cde5a0a1743332d4 [file] [log] [blame]
/*
* Copyright (C) Igor Sysoev
* Copyright (C) Nginx, Inc.
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>
typedef struct {
ngx_str_t name;
ngx_array_t *lengths;
ngx_array_t *values;
} ngx_http_index_t;
typedef struct {
ngx_array_t *indices; /* array of ngx_http_index_t */
size_t max_index_len;
} ngx_http_index_loc_conf_t;
#define NGX_HTTP_DEFAULT_INDEX "index.html"
static ngx_int_t ngx_http_index_test_dir(ngx_http_request_t *r,
ngx_http_core_loc_conf_t *clcf, u_char *path, u_char *last);
static ngx_int_t ngx_http_index_error(ngx_http_request_t *r,
ngx_http_core_loc_conf_t *clcf, u_char *file, ngx_err_t err);
static ngx_int_t ngx_http_index_init(ngx_conf_t *cf);
static void *ngx_http_index_create_loc_conf(ngx_conf_t *cf);
static char *ngx_http_index_merge_loc_conf(ngx_conf_t *cf,
void *parent, void *child);
static char *ngx_http_index_set_index(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
static ngx_command_t ngx_http_index_commands[] = {
{ ngx_string("index"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
ngx_http_index_set_index,
NGX_HTTP_LOC_CONF_OFFSET,
0,
NULL },
ngx_null_command
};
static ngx_http_module_t ngx_http_index_module_ctx = {
NULL, /* preconfiguration */
ngx_http_index_init, /* postconfiguration */
NULL, /* create main configuration */
NULL, /* init main configuration */
NULL, /* create server configuration */
NULL, /* merge server configuration */
ngx_http_index_create_loc_conf, /* create location configuration */
ngx_http_index_merge_loc_conf /* merge location configuration */
};
ngx_module_t ngx_http_index_module = {
NGX_MODULE_V1,
&ngx_http_index_module_ctx, /* module context */
ngx_http_index_commands, /* module directives */
NGX_HTTP_MODULE, /* module type */
NULL, /* init master */
NULL, /* init module */
NULL, /* init process */
NULL, /* init thread */
NULL, /* exit thread */
NULL, /* exit process */
NULL, /* exit master */
NGX_MODULE_V1_PADDING
};
/*
* Try to open/test the first index file before the test of directory
* existence because valid requests should prevail over invalid ones.
* If open()/stat() of a file will fail then stat() of a directory
* should be faster because kernel may have already cached some data.
* Besides, Win32 may return ERROR_PATH_NOT_FOUND (NGX_ENOTDIR) at once.
* Unix has ENOTDIR error; however, it's less helpful than Win32's one:
* it only indicates that path points to a regular file, not a directory.
*/
static ngx_int_t
ngx_http_index_handler(ngx_http_request_t *r)
{
u_char *p, *name;
size_t len, root, reserve, allocated;
ngx_int_t rc;
ngx_str_t path, uri;
ngx_uint_t i, dir_tested;
ngx_http_index_t *index;
ngx_open_file_info_t of;
ngx_http_script_code_pt code;
ngx_http_script_engine_t e;
ngx_http_core_loc_conf_t *clcf;
ngx_http_index_loc_conf_t *ilcf;
ngx_http_script_len_code_pt lcode;
if (r->uri.data[r->uri.len - 1] != '/') {
return NGX_DECLINED;
}
if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD|NGX_HTTP_POST))) {
return NGX_DECLINED;
}
ilcf = ngx_http_get_module_loc_conf(r, ngx_http_index_module);
clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
allocated = 0;
root = 0;
dir_tested = 0;
name = NULL;
/* suppress MSVC warning */
path.data = NULL;
index = ilcf->indices->elts;
for (i = 0; i < ilcf->indices->nelts; i++) {
if (index[i].lengths == NULL) {
if (index[i].name.data[0] == '/') {
return ngx_http_internal_redirect(r, &index[i].name, &r->args);
}
reserve = ilcf->max_index_len;
len = index[i].name.len;
} else {
ngx_memzero(&e, sizeof(ngx_http_script_engine_t));
e.ip = index[i].lengths->elts;
e.request = r;
e.flushed = 1;
/* 1 is for terminating '\0' as in static names */
len = 1;
while (*(uintptr_t *) e.ip) {
lcode = *(ngx_http_script_len_code_pt *) e.ip;
len += lcode(&e);
}
/* 16 bytes are preallocation */
reserve = len + 16;
}
if (reserve > allocated) {
name = ngx_http_map_uri_to_path(r, &path, &root, reserve);
if (name == NULL) {
return NGX_ERROR;
}
allocated = path.data + path.len - name;
}
if (index[i].values == NULL) {
/* index[i].name.len includes the terminating '\0' */
ngx_memcpy(name, index[i].name.data, index[i].name.len);
path.len = (name + index[i].name.len - 1) - path.data;
} else {
e.ip = index[i].values->elts;
e.pos = name;
while (*(uintptr_t *) e.ip) {
code = *(ngx_http_script_code_pt *) e.ip;
code((ngx_http_script_engine_t *) &e);
}
if (*name == '/') {
uri.len = len - 1;
uri.data = name;
return ngx_http_internal_redirect(r, &uri, &r->args);
}
path.len = e.pos - path.data;
*e.pos = '\0';
}
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"open index \"%V\"", &path);
ngx_memzero(&of, sizeof(ngx_open_file_info_t));
of.read_ahead = clcf->read_ahead;
of.directio = clcf->directio;
of.valid = clcf->open_file_cache_valid;
of.min_uses = clcf->open_file_cache_min_uses;
of.test_only = 1;
of.errors = clcf->open_file_cache_errors;
of.events = clcf->open_file_cache_events;
if (ngx_http_set_disable_symlinks(r, clcf, &path, &of) != NGX_OK) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
if (ngx_open_cached_file(clcf->open_file_cache, &path, &of, r->pool)
!= NGX_OK)
{
if (of.err == 0) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, of.err,
"%s \"%s\" failed", of.failed, path.data);
#if (NGX_HAVE_OPENAT)
if (of.err == NGX_EMLINK
|| of.err == NGX_ELOOP)
{
return NGX_HTTP_FORBIDDEN;
}
#endif
if (of.err == NGX_ENOTDIR
|| of.err == NGX_ENAMETOOLONG
|| of.err == NGX_EACCES)
{
return ngx_http_index_error(r, clcf, path.data, of.err);
}
if (!dir_tested) {
rc = ngx_http_index_test_dir(r, clcf, path.data, name - 1);
if (rc != NGX_OK) {
return rc;
}
dir_tested = 1;
}
if (of.err == NGX_ENOENT) {
continue;
}
ngx_log_error(NGX_LOG_CRIT, r->connection->log, of.err,
"%s \"%s\" failed", of.failed, path.data);
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
uri.len = r->uri.len + len - 1;
if (!clcf->alias) {
uri.data = path.data + root;
} else {
uri.data = ngx_pnalloc(r->pool, uri.len);
if (uri.data == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
p = ngx_copy(uri.data, r->uri.data, r->uri.len);
ngx_memcpy(p, name, len - 1);
}
return ngx_http_internal_redirect(r, &uri, &r->args);
}
return NGX_DECLINED;
}
static ngx_int_t
ngx_http_index_test_dir(ngx_http_request_t *r, ngx_http_core_loc_conf_t *clcf,
u_char *path, u_char *last)
{
u_char c;
ngx_str_t dir;
ngx_open_file_info_t of;
c = *last;
if (c != '/' || path == last) {
/* "alias" without trailing slash */
c = *(++last);
}
*last = '\0';
dir.len = last - path;
dir.data = path;
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http index check dir: \"%V\"", &dir);
ngx_memzero(&of, sizeof(ngx_open_file_info_t));
of.test_dir = 1;
of.test_only = 1;
of.valid = clcf->open_file_cache_valid;
of.errors = clcf->open_file_cache_errors;
if (ngx_http_set_disable_symlinks(r, clcf, &dir, &of) != NGX_OK) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
if (ngx_open_cached_file(clcf->open_file_cache, &dir, &of, r->pool)
!= NGX_OK)
{
if (of.err) {
#if (NGX_HAVE_OPENAT)
if (of.err == NGX_EMLINK
|| of.err == NGX_ELOOP)
{
return NGX_HTTP_FORBIDDEN;
}
#endif
if (of.err == NGX_ENOENT) {
*last = c;
return ngx_http_index_error(r, clcf, dir.data, NGX_ENOENT);
}
if (of.err == NGX_EACCES) {
*last = c;
/*
* ngx_http_index_test_dir() is called after the first index
* file testing has returned an error distinct from NGX_EACCES.
* This means that directory searching is allowed.
*/
return NGX_OK;
}
ngx_log_error(NGX_LOG_CRIT, r->connection->log, of.err,
"%s \"%s\" failed", of.failed, dir.data);
}
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
*last = c;
if (of.is_dir) {
return NGX_OK;
}
ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
"\"%s\" is not a directory", dir.data);
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
static ngx_int_t
ngx_http_index_error(ngx_http_request_t *r, ngx_http_core_loc_conf_t *clcf,
u_char *file, ngx_err_t err)
{
if (err == NGX_EACCES) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, err,
"\"%s\" is forbidden", file);
return NGX_HTTP_FORBIDDEN;
}
if (clcf->log_not_found) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, err,
"\"%s\" is not found", file);
}
return NGX_HTTP_NOT_FOUND;
}
static void *
ngx_http_index_create_loc_conf(ngx_conf_t *cf)
{
ngx_http_index_loc_conf_t *conf;
conf = ngx_palloc(cf->pool, sizeof(ngx_http_index_loc_conf_t));
if (conf == NULL) {
return NULL;
}
conf->indices = NULL;
conf->max_index_len = 0;
return conf;
}
static char *
ngx_http_index_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
{
ngx_http_index_loc_conf_t *prev = parent;
ngx_http_index_loc_conf_t *conf = child;
ngx_http_index_t *index;
if (conf->indices == NULL) {
conf->indices = prev->indices;
conf->max_index_len = prev->max_index_len;
}
if (conf->indices == NULL) {
conf->indices = ngx_array_create(cf->pool, 1, sizeof(ngx_http_index_t));
if (conf->indices == NULL) {
return NGX_CONF_ERROR;
}
index = ngx_array_push(conf->indices);
if (index == NULL) {
return NGX_CONF_ERROR;
}
index->name.len = sizeof(NGX_HTTP_DEFAULT_INDEX);
index->name.data = (u_char *) NGX_HTTP_DEFAULT_INDEX;
index->lengths = NULL;
index->values = NULL;
conf->max_index_len = sizeof(NGX_HTTP_DEFAULT_INDEX);
return NGX_CONF_OK;
}
return NGX_CONF_OK;
}
static ngx_int_t
ngx_http_index_init(ngx_conf_t *cf)
{
ngx_http_handler_pt *h;
ngx_http_core_main_conf_t *cmcf;
cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
h = ngx_array_push(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers);
if (h == NULL) {
return NGX_ERROR;
}
*h = ngx_http_index_handler;
return NGX_OK;
}
/* TODO: warn about duplicate indices */
static char *
ngx_http_index_set_index(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
ngx_http_index_loc_conf_t *ilcf = conf;
ngx_str_t *value;
ngx_uint_t i, n;
ngx_http_index_t *index;
ngx_http_script_compile_t sc;
if (ilcf->indices == NULL) {
ilcf->indices = ngx_array_create(cf->pool, 2, sizeof(ngx_http_index_t));
if (ilcf->indices == NULL) {
return NGX_CONF_ERROR;
}
}
value = cf->args->elts;
for (i = 1; i < cf->args->nelts; i++) {
if (value[i].data[0] == '/' && i != cf->args->nelts - 1) {
ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
"only the last index in \"index\" directive "
"should be absolute");
}
if (value[i].len == 0) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"index \"%V\" in \"index\" directive is invalid",
&value[1]);
return NGX_CONF_ERROR;
}
index = ngx_array_push(ilcf->indices);
if (index == NULL) {
return NGX_CONF_ERROR;
}
index->name.len = value[i].len;
index->name.data = value[i].data;
index->lengths = NULL;
index->values = NULL;
n = ngx_http_script_variables_count(&value[i]);
if (n == 0) {
if (ilcf->max_index_len < index->name.len) {
ilcf->max_index_len = index->name.len;
}
if (index->name.data[0] == '/') {
continue;
}
/* include the terminating '\0' to the length to use ngx_memcpy() */
index->name.len++;
continue;
}
ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
sc.cf = cf;
sc.source = &value[i];
sc.lengths = &index->lengths;
sc.values = &index->values;
sc.variables = n;
sc.complete_lengths = 1;
sc.complete_values = 1;
if (ngx_http_script_compile(&sc) != NGX_OK) {
return NGX_CONF_ERROR;
}
}
return NGX_CONF_OK;
}