Mercurial > hg > nginx-vendor-current
view src/http/modules/ngx_http_index_handler.c @ 34:aab2ea7c0458 NGINX_0_1_17
nginx 0.1.17
*) Change: the ngx_http_rewrite_module was rewritten from the scratch.
Now it is possible to redirect, to return the error codes, to check
the variables and referrers. The directives can be used inside
locations. The redirect directive was canceled.
*) Feature: the ngx_http_geo_module.
*) Feature: the proxy_set_x_var and fastcgi_set_var directives.
*) Bugfix: the location configuration with "=" modifier may be used in
another location.
*) Bugfix: the correct content type was set only for requests that use
small caps letters in extension.
*) Bugfix: if the proxy_pass or fastcgi_pass directives were set in the
location, and access was denied, and the error was redirected to a
static page, then the segmentation fault occurred.
*) Bugfix: if in a proxied "Location" header was a relative URL, then a
host name and a slash were added to them; bug appeared in 0.1.14.
*) Bugfix: the system error message was not logged on Linux.
author | Igor Sysoev <http://sysoev.ru> |
---|---|
date | Thu, 03 Feb 2005 00:00:00 +0300 |
parents | 420dd3f9e703 |
children | 2879cd3a40cb |
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/* * Copyright (C) Igor Sysoev */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_http.h> typedef struct { ngx_array_t indices; size_t max_index_len; ngx_http_cache_hash_t *index_cache; } ngx_http_index_loc_conf_t; typedef struct { ngx_uint_t index; u_char *last; ngx_str_t path; ngx_str_t redirect; ngx_http_cache_entry_t *cache; ngx_uint_t tested; /* unsigned tested:1 */ } ngx_http_index_ctx_t; #define NGX_HTTP_DEFAULT_INDEX "index.html" static ngx_int_t ngx_http_index_test_dir(ngx_http_request_t *r, ngx_http_index_ctx_t *ctx); static ngx_int_t ngx_http_index_error(ngx_http_request_t *r, ngx_http_index_ctx_t *ctx, ngx_err_t err); static ngx_int_t ngx_http_index_init(ngx_cycle_t *cycle); 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_LOC_CONF|NGX_CONF_1MORE, ngx_http_index_set_index, NGX_HTTP_LOC_CONF_OFFSET, 0, NULL }, #if (NGX_HTTP_CACHE) { ngx_string("index_cache"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE3, ngx_http_set_cache_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_index_loc_conf_t, index_cache), NULL }, #endif ngx_null_command }; ngx_http_module_t ngx_http_index_module_ctx = { NULL, /* pre conf */ NULL, /* create main configuration */ NULL, /* init main configuration */ NULL, /* create server configuration */ NULL, /* merge server configuration */ ngx_http_index_create_loc_conf, /* create location configration */ ngx_http_index_merge_loc_conf /* merge location configration */ }; ngx_module_t ngx_http_index_module = { NGX_MODULE, &ngx_http_index_module_ctx, /* module context */ ngx_http_index_commands, /* module directives */ NGX_HTTP_MODULE, /* module type */ ngx_http_index_init, /* init module */ NULL /* init child */ }; /* * Try to open the first index file before the test of the directory existence * because the valid requests should be many more than invalid ones. * If open() failed then stat() should be more quickly because some data * is already cached in the kernel. * Besides Win32 has ERROR_PATH_NOT_FOUND (NGX_ENOTDIR). * Unix has ENOTDIR error, although it less helpfull - it shows only * that path contains the usual file in place of the directory. */ static ngx_int_t ngx_http_index_handler(ngx_http_request_t *r) { u_char *name; ngx_fd_t fd; ngx_int_t rc; ngx_str_t *index; ngx_err_t err; ngx_log_t *log; ngx_http_index_ctx_t *ctx; ngx_http_core_loc_conf_t *clcf; ngx_http_index_loc_conf_t *ilcf; #if (NGX_HTTP_CACHE0) /* crc must be in ctx !! */ uint32_t crc; #endif if (r->uri.data[r->uri.len - 1] != '/') { return NGX_DECLINED; } log = r->connection->log; /* * we use context because the handler supports an async file opening * and thus can be called several times */ clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); ilcf = ngx_http_get_module_loc_conf(r, ngx_http_index_module); ctx = ngx_http_get_module_ctx(r, ngx_http_index_module); if (ctx == NULL) { ngx_http_create_ctx(r, ctx, ngx_http_index_module, sizeof(ngx_http_index_ctx_t), NGX_HTTP_INTERNAL_SERVER_ERROR); #if (NGX_HTTP_CACHE) if (ilcf->index_cache) { ctx->cache = ngx_http_cache_get(ilcf->index_cache, NULL, &r->uri, &crc); ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0, "http index cache get: %p", ctx->cache); if (ctx->cache && !ctx->cache->expired) { ctx->cache->accessed = ngx_cached_time; ctx->redirect.len = ctx->cache->data.value.len; ctx->redirect.data = ngx_palloc(r->pool, ctx->redirect.len + 1); if (ctx->redirect.data == NULL) { ngx_http_cache_unlock(ilcf->index_cache, ctx->cache, log); return NGX_HTTP_INTERNAL_SERVER_ERROR; } ngx_memcpy(ctx->redirect.data, ctx->cache->data.value.data, ctx->redirect.len + 1); ngx_http_cache_unlock(ilcf->index_cache, ctx->cache, log); return ngx_http_internal_redirect(r, &ctx->redirect, NULL); } } #endif #if 0 ctx->path.data = ngx_palloc(r->pool, clcf->root.len + r->uri.len + ilcf->max_index_len - clcf->alias * clcf->name.len); if (ctx->path.data == NULL) { return NGX_HTTP_INTERNAL_SERVER_ERROR; } ctx->redirect.data = ngx_cpymem(ctx->path.data, clcf->root.data, clcf->root.len); #endif if (clcf->alias) { ctx->path.data = ngx_palloc(r->pool, clcf->root.len + r->uri.len + 1 - clcf->name.len + ilcf->max_index_len); if (ctx->path.data == NULL) { return NGX_HTTP_INTERNAL_SERVER_ERROR; } ctx->redirect.data = ngx_palloc(r->pool, r->uri.len + ilcf->max_index_len); if (ctx->redirect.data == NULL) { return NGX_HTTP_INTERNAL_SERVER_ERROR; } ngx_memcpy(ctx->path.data, clcf->root.data, clcf->root.len); ctx->last = ngx_cpystrn(ctx->path.data + clcf->root.len, r->uri.data + clcf->name.len, r->uri.len + 1 - clcf->name.len); #if 0 /* * aliases usually have trailling "/", * set it in the start of the possible redirect */ if (*ctx->redirect.data != '/') { ctx->redirect.data--; } #endif } else { ctx->path.data = ngx_palloc(r->pool, clcf->root.len + r->uri.len + ilcf->max_index_len); if (ctx->path.data == NULL) { return NGX_HTTP_INTERNAL_SERVER_ERROR; } ctx->redirect.data = ngx_cpymem(ctx->path.data, clcf->root.data, clcf->root.len); ctx->last = ngx_cpystrn(ctx->redirect.data, r->uri.data, r->uri.len + 1); } } ctx->path.len = ctx->last - ctx->path.data; index = ilcf->indices.elts; for (/* void */; ctx->index < ilcf->indices.nelts; ctx->index++) { if (index[ctx->index].data[0] == '/') { name = index[ctx->index].data; } else { ngx_memcpy(ctx->last, index[ctx->index].data, index[ctx->index].len + 1); name = ctx->path.data; } ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0, "open index \"%s\"", name); fd = ngx_open_file(name, NGX_FILE_RDONLY, NGX_FILE_OPEN); if (fd == (ngx_fd_t) NGX_AGAIN) { return NGX_AGAIN; } if (fd == NGX_INVALID_FILE) { err = ngx_errno; ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, err, ngx_open_file_n " \"%s\" failed", name); if (err == NGX_ENOTDIR) { return ngx_http_index_error(r, ctx, err); } else if (err == NGX_EACCES) { return ngx_http_index_error(r, ctx, err); } if (!ctx->tested) { rc = ngx_http_index_test_dir(r, ctx); if (rc != NGX_OK) { return rc; } ctx->tested = 1; } if (err == NGX_ENOENT) { continue; } ngx_log_error(NGX_LOG_ERR, log, err, ngx_open_file_n " \"%s\" failed", name); return NGX_HTTP_INTERNAL_SERVER_ERROR; } /* STUB: open file cache */ r->file.name.data = name; r->file.fd = fd; if (index[ctx->index].data[0] == '/') { r->file.name.len = index[ctx->index].len; ctx->redirect.len = index[ctx->index].len; ctx->redirect.data = index[ctx->index].data; } else { if (clcf->alias) { name = ngx_cpymem(ctx->redirect.data, r->uri.data, r->uri.len); ngx_memcpy(name, index[ctx->index].data, index[ctx->index].len + 1); } ctx->redirect.len = r->uri.len + index[ctx->index].len; r->file.name.len = clcf->root.len + r->uri.len - clcf->alias * clcf->name.len + index[ctx->index].len; } /**/ #if (NGX_HTTP_CACHE) if (ilcf->index_cache) { if (ctx->cache) { if (ctx->redirect.len == ctx->cache->data.value.len && ngx_memcmp(ctx->cache->data.value.data, ctx->redirect.data, ctx->redirect.len) == 0) { ctx->cache->accessed = ngx_cached_time; ctx->cache->updated = ngx_cached_time; ngx_http_cache_unlock(ilcf->index_cache, ctx->cache, log); return ngx_http_internal_redirect(r, &ctx->redirect, NULL); } } ctx->redirect.len++; ctx->cache = ngx_http_cache_alloc(ilcf->index_cache, ctx->cache, NULL, &r->uri, crc, &ctx->redirect, log); ctx->redirect.len--; ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0, "http index cache alloc: %p", ctx->cache); if (ctx->cache) { ctx->cache->fd = NGX_INVALID_FILE; ctx->cache->accessed = ngx_cached_time; ctx->cache->last_modified = 0; ctx->cache->updated = ngx_cached_time; ctx->cache->memory = 1; ngx_http_cache_unlock(ilcf->index_cache, ctx->cache, log); } } #endif return ngx_http_internal_redirect(r, &ctx->redirect, NULL); } return NGX_DECLINED; } static ngx_int_t ngx_http_index_test_dir(ngx_http_request_t *r, ngx_http_index_ctx_t *ctx) { ngx_err_t err; ctx->path.data[ctx->path.len - 1] = '\0'; ctx->path.data[ctx->path.len] = '\0'; ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "http check dir: \"%s\"", ctx->path.data); if (ngx_file_info(ctx->path.data, &r->file.info) == -1) { err = ngx_errno; if (err == NGX_ENOENT) { ctx->path.data[ctx->path.len - 1] = '/'; return ngx_http_index_error(r, ctx, err); } ngx_log_error(NGX_LOG_CRIT, r->connection->log, err, ngx_file_info_n " \"%s\" failed", ctx->path.data); return NGX_HTTP_INTERNAL_SERVER_ERROR; } ctx->path.data[ctx->path.len - 1] = '/'; if (ngx_is_dir(&r->file.info)) { return NGX_OK; } /* THINK: not reached ??? */ return ngx_http_index_error(r, ctx, 0); } static ngx_int_t ngx_http_index_error(ngx_http_request_t *r, ngx_http_index_ctx_t *ctx, ngx_err_t err) { if (err == NGX_EACCES) { ngx_log_error(NGX_LOG_ERR, r->connection->log, err, "\"%s\" is forbidden", ctx->path.data); return NGX_HTTP_FORBIDDEN; } ngx_log_error(NGX_LOG_ERR, r->connection->log, err, "\"%s\" is not found", ctx->path.data); return NGX_HTTP_NOT_FOUND; } static ngx_int_t ngx_http_index_init(ngx_cycle_t *cycle) { ngx_http_handler_pt *h; ngx_http_core_main_conf_t *cmcf; cmcf = ngx_http_cycle_get_module_main_conf(cycle, ngx_http_core_module); h = ngx_push_array(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers); if (h == NULL) { return NGX_ERROR; } *h = ngx_http_index_handler; return NGX_OK; } static void *ngx_http_index_create_loc_conf(ngx_conf_t *cf) { ngx_http_index_loc_conf_t *conf; ngx_test_null(conf, ngx_palloc(cf->pool, sizeof(ngx_http_index_loc_conf_t)), NGX_CONF_ERROR); ngx_init_array(conf->indices, cf->pool, 3, sizeof(ngx_str_t), NGX_CONF_ERROR); conf->max_index_len = 0; conf->index_cache = NULL; return conf; } /* TODO: remove duplicate indices */ 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_str_t *index; if (conf->max_index_len == 0) { if (prev->max_index_len != 0) { ngx_memcpy(conf, prev, sizeof(ngx_http_index_loc_conf_t)); return NGX_CONF_OK; } ngx_test_null(index, ngx_push_array(&conf->indices), NGX_CONF_ERROR); index->len = sizeof(NGX_HTTP_DEFAULT_INDEX) - 1; index->data = (u_char *) NGX_HTTP_DEFAULT_INDEX; conf->max_index_len = sizeof(NGX_HTTP_DEFAULT_INDEX); return NGX_CONF_OK; } #if 0 if (prev->max_index_len != 0) { prev_index = prev->indices.elts; for (i = 0; i < prev->indices.nelts; i++) { ngx_test_null(index, ngx_push_array(&conf->indices), NGX_CONF_ERROR); index->len = prev_index[i].len; index->data = prev_index[i].data; } } if (conf->max_index_len < prev->max_index_len) { conf->max_index_len = prev->max_index_len; } #endif if (conf->index_cache == NULL) { conf->index_cache = prev->index_cache; } return NGX_CONF_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_uint_t i; ngx_str_t *index, *value; value = cf->args->elts; if (value[1].data[0] == '/' && ilcf->indices.nelts == 0) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "first index \"%V\" in \"%V\" directive " "must not be absolute", &value[1], &cmd->name); return NGX_CONF_ERROR; } for (i = 1; i < cf->args->nelts; i++) { if (value[i].len == 0) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "index \"%V\" in \"%V\" directive is invalid", &value[1], &cmd->name); return NGX_CONF_ERROR; } ngx_test_null(index, ngx_push_array(&ilcf->indices), NGX_CONF_ERROR); index->len = value[i].len; index->data = value[i].data; if (ilcf->max_index_len < index->len + 1) { ilcf->max_index_len = index->len + 1; } } return NGX_CONF_OK; }