Mercurial > hg > nginx-quic
view src/http/modules/ngx_http_index_handler.c @ 312:f5431a4bbc7d
nginx-0.0.3-2004-04-13-09:27:03 import
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Tue, 13 Apr 2004 05:27:03 +0000 |
parents | ec3c049681fd |
children | 2e3cbc1bbe3c |
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#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_t *cache; 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 int 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. */ int 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_CACHE) 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: " PTR_FMT, 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 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); if (clcf->alias) { ctx->last = ngx_cpystrn(ctx->redirect.data, r->uri.data + clcf->name.len, r->uri.len + 1 - clcf->name.len); /* * aliases usually have trailling "/", * set it in the start of the possible redirect */ if (*ctx->redirect.data != '/') { ctx->redirect.data--; } } else { 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; } 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_error(NGX_LOG_DEBUG, log, err, "debug: " 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 { ctx->redirect.len = r->uri.len + index[ctx->index].len; r->file.name.len = clcf->root.len + r->uri.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: " PTR_FMT, 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 int ngx_http_index_init(ngx_cycle_t *cycle) { ngx_http_handler_pt *h; ngx_http_conf_ctx_t *ctx; ngx_http_core_main_conf_t *cmcf; ctx = (ngx_http_conf_ctx_t *) cycle->conf_ctx[ngx_http_module.index]; cmcf = ctx->main_conf[ngx_http_core_module.ctx_index]; 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_uint_t i; ngx_str_t *index, *prev_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 (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; } 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 \"%s\" in \"%s\" directive " "must not be absolute", value[1].data, cmd->name.data); 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 \"%s\" in \"%s\" directive is invalid", value[1].data, cmd->name.data); 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; }