mirror of
https://github.com/nginx/nginx.git
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f5f4126574
fastcgi_upstream_max_fails, fastcgi_upstream_fail_timeout, memcached_upstream_max_fails, and memcached_upstream_fail_timeout directives obsolete since 0.5.0 version
624 lines
17 KiB
C
624 lines
17 KiB
C
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/*
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* Copyright (C) Igor Sysoev
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*/
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#include <ngx_config.h>
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#include <ngx_core.h>
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#include <ngx_http.h>
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typedef struct {
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ngx_http_upstream_conf_t upstream;
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ngx_int_t index;
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} ngx_http_memcached_loc_conf_t;
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typedef struct {
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size_t rest;
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ngx_http_request_t *request;
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ngx_str_t key;
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} ngx_http_memcached_ctx_t;
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static ngx_int_t ngx_http_memcached_create_request(ngx_http_request_t *r);
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static ngx_int_t ngx_http_memcached_reinit_request(ngx_http_request_t *r);
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static ngx_int_t ngx_http_memcached_process_header(ngx_http_request_t *r);
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static ngx_int_t ngx_http_memcached_filter_init(void *data);
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static ngx_int_t ngx_http_memcached_filter(void *data, ssize_t bytes);
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static void ngx_http_memcached_abort_request(ngx_http_request_t *r);
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static void ngx_http_memcached_finalize_request(ngx_http_request_t *r,
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ngx_int_t rc);
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static void *ngx_http_memcached_create_loc_conf(ngx_conf_t *cf);
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static char *ngx_http_memcached_merge_loc_conf(ngx_conf_t *cf,
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void *parent, void *child);
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static char *ngx_http_memcached_pass(ngx_conf_t *cf, ngx_command_t *cmd,
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void *conf);
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static ngx_conf_bitmask_t ngx_http_memcached_next_upstream_masks[] = {
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{ ngx_string("error"), NGX_HTTP_UPSTREAM_FT_ERROR },
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{ ngx_string("timeout"), NGX_HTTP_UPSTREAM_FT_TIMEOUT },
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{ ngx_string("invalid_response"), NGX_HTTP_UPSTREAM_FT_INVALID_HEADER },
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{ ngx_string("not_found"), NGX_HTTP_UPSTREAM_FT_HTTP_404 },
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{ ngx_string("off"), NGX_HTTP_UPSTREAM_FT_OFF },
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{ ngx_null_string, 0 }
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};
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static ngx_command_t ngx_http_memcached_commands[] = {
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{ ngx_string("memcached_pass"),
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NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF|NGX_CONF_TAKE1,
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ngx_http_memcached_pass,
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NGX_HTTP_LOC_CONF_OFFSET,
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0,
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NULL },
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{ ngx_string("memcached_bind"),
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NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
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ngx_http_upstream_bind_set_slot,
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NGX_HTTP_LOC_CONF_OFFSET,
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offsetof(ngx_http_memcached_loc_conf_t, upstream.local),
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NULL },
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{ ngx_string("memcached_connect_timeout"),
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NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
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ngx_conf_set_msec_slot,
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NGX_HTTP_LOC_CONF_OFFSET,
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offsetof(ngx_http_memcached_loc_conf_t, upstream.connect_timeout),
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NULL },
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{ ngx_string("memcached_send_timeout"),
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NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
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ngx_conf_set_msec_slot,
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NGX_HTTP_LOC_CONF_OFFSET,
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offsetof(ngx_http_memcached_loc_conf_t, upstream.send_timeout),
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NULL },
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{ ngx_string("memcached_buffer_size"),
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NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
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ngx_conf_set_size_slot,
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NGX_HTTP_LOC_CONF_OFFSET,
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offsetof(ngx_http_memcached_loc_conf_t, upstream.buffer_size),
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NULL },
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{ ngx_string("memcached_read_timeout"),
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NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
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ngx_conf_set_msec_slot,
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NGX_HTTP_LOC_CONF_OFFSET,
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offsetof(ngx_http_memcached_loc_conf_t, upstream.read_timeout),
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NULL },
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{ ngx_string("memcached_next_upstream"),
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NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
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ngx_conf_set_bitmask_slot,
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NGX_HTTP_LOC_CONF_OFFSET,
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offsetof(ngx_http_memcached_loc_conf_t, upstream.next_upstream),
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&ngx_http_memcached_next_upstream_masks },
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ngx_null_command
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};
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static ngx_http_module_t ngx_http_memcached_module_ctx = {
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NULL, /* preconfiguration */
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NULL, /* postconfiguration */
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NULL, /* create main configuration */
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NULL, /* init main configuration */
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NULL, /* create server configuration */
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NULL, /* merge server configuration */
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ngx_http_memcached_create_loc_conf, /* create location configration */
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ngx_http_memcached_merge_loc_conf /* merge location configration */
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};
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ngx_module_t ngx_http_memcached_module = {
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NGX_MODULE_V1,
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&ngx_http_memcached_module_ctx, /* module context */
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ngx_http_memcached_commands, /* module directives */
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NGX_HTTP_MODULE, /* module type */
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NULL, /* init master */
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NULL, /* init module */
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NULL, /* init process */
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NULL, /* init thread */
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NULL, /* exit thread */
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NULL, /* exit process */
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NULL, /* exit master */
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NGX_MODULE_V1_PADDING
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};
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static ngx_str_t ngx_http_memcached_key = ngx_string("memcached_key");
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#define NGX_HTTP_MEMCACHED_END (sizeof(ngx_http_memcached_end) - 1)
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static u_char ngx_http_memcached_end[] = CRLF "END" CRLF;
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static ngx_int_t
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ngx_http_memcached_handler(ngx_http_request_t *r)
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{
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ngx_int_t rc;
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ngx_http_upstream_t *u;
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ngx_http_memcached_ctx_t *ctx;
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ngx_http_memcached_loc_conf_t *mlcf;
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if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD))) {
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return NGX_HTTP_NOT_ALLOWED;
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}
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rc = ngx_http_discard_request_body(r);
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if (rc != NGX_OK) {
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return rc;
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}
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if (ngx_http_set_content_type(r) != NGX_OK) {
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return NGX_HTTP_INTERNAL_SERVER_ERROR;
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}
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if (ngx_http_upstream_create(r) != NGX_OK) {
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return NGX_HTTP_INTERNAL_SERVER_ERROR;
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}
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u = r->upstream;
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ngx_str_set(&u->schema, "memcached://");
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u->output.tag = (ngx_buf_tag_t) &ngx_http_memcached_module;
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mlcf = ngx_http_get_module_loc_conf(r, ngx_http_memcached_module);
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u->conf = &mlcf->upstream;
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u->create_request = ngx_http_memcached_create_request;
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u->reinit_request = ngx_http_memcached_reinit_request;
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u->process_header = ngx_http_memcached_process_header;
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u->abort_request = ngx_http_memcached_abort_request;
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u->finalize_request = ngx_http_memcached_finalize_request;
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ctx = ngx_palloc(r->pool, sizeof(ngx_http_memcached_ctx_t));
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if (ctx == NULL) {
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return NGX_HTTP_INTERNAL_SERVER_ERROR;
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}
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ctx->rest = NGX_HTTP_MEMCACHED_END;
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ctx->request = r;
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ngx_http_set_ctx(r, ctx, ngx_http_memcached_module);
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u->input_filter_init = ngx_http_memcached_filter_init;
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u->input_filter = ngx_http_memcached_filter;
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u->input_filter_ctx = ctx;
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r->main->count++;
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ngx_http_upstream_init(r);
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return NGX_DONE;
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}
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static ngx_int_t
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ngx_http_memcached_create_request(ngx_http_request_t *r)
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{
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size_t len;
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uintptr_t escape;
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ngx_buf_t *b;
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ngx_chain_t *cl;
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ngx_http_memcached_ctx_t *ctx;
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ngx_http_variable_value_t *vv;
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ngx_http_memcached_loc_conf_t *mlcf;
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mlcf = ngx_http_get_module_loc_conf(r, ngx_http_memcached_module);
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vv = ngx_http_get_indexed_variable(r, mlcf->index);
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if (vv == NULL || vv->not_found || vv->len == 0) {
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ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
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"the \"$memcached_key\" variable is not set");
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return NGX_ERROR;
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}
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escape = 2 * ngx_escape_uri(NULL, vv->data, vv->len, NGX_ESCAPE_MEMCACHED);
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len = sizeof("get ") - 1 + vv->len + escape + sizeof(CRLF) - 1;
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b = ngx_create_temp_buf(r->pool, len);
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if (b == NULL) {
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return NGX_ERROR;
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}
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cl = ngx_alloc_chain_link(r->pool);
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if (cl == NULL) {
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return NGX_ERROR;
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}
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cl->buf = b;
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cl->next = NULL;
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r->upstream->request_bufs = cl;
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*b->last++ = 'g'; *b->last++ = 'e'; *b->last++ = 't'; *b->last++ = ' ';
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ctx = ngx_http_get_module_ctx(r, ngx_http_memcached_module);
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ctx->key.data = b->last;
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if (escape == 0) {
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b->last = ngx_copy(b->last, vv->data, vv->len);
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} else {
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b->last = (u_char *) ngx_escape_uri(b->last, vv->data, vv->len,
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NGX_ESCAPE_MEMCACHED);
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}
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ctx->key.len = b->last - ctx->key.data;
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ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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"http memcached request: \"%V\"", &ctx->key);
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*b->last++ = CR; *b->last++ = LF;
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return NGX_OK;
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}
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static ngx_int_t
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ngx_http_memcached_reinit_request(ngx_http_request_t *r)
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{
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return NGX_OK;
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}
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static ngx_int_t
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ngx_http_memcached_process_header(ngx_http_request_t *r)
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{
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u_char *p, *len;
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ngx_str_t line;
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ngx_http_upstream_t *u;
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ngx_http_memcached_ctx_t *ctx;
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u = r->upstream;
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for (p = u->buffer.pos; p < u->buffer.last; p++) {
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if (*p == LF) {
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goto found;
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}
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}
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return NGX_AGAIN;
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found:
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*p = '\0';
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line.len = p - u->buffer.pos - 1;
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line.data = u->buffer.pos;
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ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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"memcached: \"%V\"", &line);
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p = u->buffer.pos;
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ctx = ngx_http_get_module_ctx(r, ngx_http_memcached_module);
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if (ngx_strncmp(p, "VALUE ", sizeof("VALUE ") - 1) == 0) {
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p += sizeof("VALUE ") - 1;
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if (ngx_strncmp(p, ctx->key.data, ctx->key.len) != 0) {
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ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
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"memcached sent invalid key in response \"%V\" "
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"for key \"%V\"",
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&line, &ctx->key);
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return NGX_HTTP_UPSTREAM_INVALID_HEADER;
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}
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p += ctx->key.len;
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if (*p++ != ' ') {
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goto no_valid;
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}
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/* skip flags */
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while (*p) {
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if (*p++ == ' ') {
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goto length;
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}
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}
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goto no_valid;
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length:
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len = p;
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while (*p && *p++ != CR) { /* void */ }
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r->headers_out.content_length_n = ngx_atoof(len, p - len - 1);
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if (r->headers_out.content_length_n == -1) {
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ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
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"memcached sent invalid length in response \"%V\" "
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"for key \"%V\"",
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&line, &ctx->key);
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return NGX_HTTP_UPSTREAM_INVALID_HEADER;
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}
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u->headers_in.status_n = 200;
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u->state->status = 200;
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u->buffer.pos = p + 1;
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return NGX_OK;
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}
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if (ngx_strcmp(p, "END\x0d") == 0) {
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ngx_log_error(NGX_LOG_INFO, r->connection->log, 0,
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"key: \"%V\" was not found by memcached", &ctx->key);
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u->headers_in.status_n = 404;
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u->state->status = 404;
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return NGX_OK;
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}
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no_valid:
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ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
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"memcached sent invalid response: \"%V\"", &line);
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return NGX_HTTP_UPSTREAM_INVALID_HEADER;
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}
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static ngx_int_t
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ngx_http_memcached_filter_init(void *data)
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{
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ngx_http_memcached_ctx_t *ctx = data;
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ngx_http_upstream_t *u;
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u = ctx->request->upstream;
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u->length += NGX_HTTP_MEMCACHED_END;
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return NGX_OK;
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}
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static ngx_int_t
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ngx_http_memcached_filter(void *data, ssize_t bytes)
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{
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ngx_http_memcached_ctx_t *ctx = data;
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u_char *last;
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ngx_buf_t *b;
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ngx_chain_t *cl, **ll;
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ngx_http_upstream_t *u;
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u = ctx->request->upstream;
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b = &u->buffer;
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if (u->length == ctx->rest) {
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if (ngx_strncmp(b->last,
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ngx_http_memcached_end + NGX_HTTP_MEMCACHED_END - ctx->rest,
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bytes)
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!= 0)
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{
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ngx_log_error(NGX_LOG_ERR, ctx->request->connection->log, 0,
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"memcached sent invalid trailer");
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u->length = 0;
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ctx->rest = 0;
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return NGX_OK;
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}
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u->length -= bytes;
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ctx->rest -= bytes;
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return NGX_OK;
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}
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for (cl = u->out_bufs, ll = &u->out_bufs; cl; cl = cl->next) {
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ll = &cl->next;
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}
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cl = ngx_chain_get_free_buf(ctx->request->pool, &u->free_bufs);
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if (cl == NULL) {
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return NGX_ERROR;
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}
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cl->buf->flush = 1;
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cl->buf->memory = 1;
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*ll = cl;
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last = b->last;
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cl->buf->pos = last;
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b->last += bytes;
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cl->buf->last = b->last;
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cl->buf->tag = u->output.tag;
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ngx_log_debug4(NGX_LOG_DEBUG_HTTP, ctx->request->connection->log, 0,
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"memcached filter bytes:%z size:%z length:%z rest:%z",
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bytes, b->last - b->pos, u->length, ctx->rest);
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if (bytes <= (ssize_t) (u->length - NGX_HTTP_MEMCACHED_END)) {
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u->length -= bytes;
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return NGX_OK;
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}
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last += u->length - NGX_HTTP_MEMCACHED_END;
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if (ngx_strncmp(last, ngx_http_memcached_end, b->last - last) != 0) {
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ngx_log_error(NGX_LOG_ERR, ctx->request->connection->log, 0,
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"memcached sent invalid trailer");
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}
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ctx->rest -= b->last - last;
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b->last = last;
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cl->buf->last = last;
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u->length = ctx->rest;
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return NGX_OK;
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}
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static void
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ngx_http_memcached_abort_request(ngx_http_request_t *r)
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{
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ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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"abort http memcached request");
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return;
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}
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static void
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ngx_http_memcached_finalize_request(ngx_http_request_t *r, ngx_int_t rc)
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{
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ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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"finalize http memcached request");
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return;
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}
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static void *
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ngx_http_memcached_create_loc_conf(ngx_conf_t *cf)
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{
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ngx_http_memcached_loc_conf_t *conf;
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conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_memcached_loc_conf_t));
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|
if (conf == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* set by ngx_pcalloc():
|
|
*
|
|
* conf->upstream.bufs.num = 0;
|
|
* conf->upstream.next_upstream = 0;
|
|
* conf->upstream.temp_path = NULL;
|
|
* conf->upstream.uri = { 0, NULL };
|
|
* conf->upstream.location = NULL;
|
|
*/
|
|
|
|
conf->upstream.connect_timeout = NGX_CONF_UNSET_MSEC;
|
|
conf->upstream.send_timeout = NGX_CONF_UNSET_MSEC;
|
|
conf->upstream.read_timeout = NGX_CONF_UNSET_MSEC;
|
|
|
|
conf->upstream.buffer_size = NGX_CONF_UNSET_SIZE;
|
|
|
|
/* the hardcoded values */
|
|
conf->upstream.cyclic_temp_file = 0;
|
|
conf->upstream.buffering = 0;
|
|
conf->upstream.ignore_client_abort = 0;
|
|
conf->upstream.send_lowat = 0;
|
|
conf->upstream.bufs.num = 0;
|
|
conf->upstream.busy_buffers_size = 0;
|
|
conf->upstream.max_temp_file_size = 0;
|
|
conf->upstream.temp_file_write_size = 0;
|
|
conf->upstream.intercept_errors = 1;
|
|
conf->upstream.intercept_404 = 1;
|
|
conf->upstream.pass_request_headers = 0;
|
|
conf->upstream.pass_request_body = 0;
|
|
|
|
conf->index = NGX_CONF_UNSET;
|
|
|
|
return conf;
|
|
}
|
|
|
|
|
|
static char *
|
|
ngx_http_memcached_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
|
|
{
|
|
ngx_http_memcached_loc_conf_t *prev = parent;
|
|
ngx_http_memcached_loc_conf_t *conf = child;
|
|
|
|
ngx_conf_merge_msec_value(conf->upstream.connect_timeout,
|
|
prev->upstream.connect_timeout, 60000);
|
|
|
|
ngx_conf_merge_msec_value(conf->upstream.send_timeout,
|
|
prev->upstream.send_timeout, 60000);
|
|
|
|
ngx_conf_merge_msec_value(conf->upstream.read_timeout,
|
|
prev->upstream.read_timeout, 60000);
|
|
|
|
ngx_conf_merge_size_value(conf->upstream.buffer_size,
|
|
prev->upstream.buffer_size,
|
|
(size_t) ngx_pagesize);
|
|
|
|
ngx_conf_merge_bitmask_value(conf->upstream.next_upstream,
|
|
prev->upstream.next_upstream,
|
|
(NGX_CONF_BITMASK_SET
|
|
|NGX_HTTP_UPSTREAM_FT_ERROR
|
|
|NGX_HTTP_UPSTREAM_FT_TIMEOUT));
|
|
|
|
if (conf->upstream.next_upstream & NGX_HTTP_UPSTREAM_FT_OFF) {
|
|
conf->upstream.next_upstream = NGX_CONF_BITMASK_SET
|
|
|NGX_HTTP_UPSTREAM_FT_OFF;
|
|
}
|
|
|
|
if (conf->upstream.upstream == NULL) {
|
|
conf->upstream.upstream = prev->upstream.upstream;
|
|
}
|
|
|
|
if (conf->index == NGX_CONF_UNSET) {
|
|
conf->index = prev->index;
|
|
}
|
|
|
|
return NGX_CONF_OK;
|
|
}
|
|
|
|
|
|
static char *
|
|
ngx_http_memcached_pass(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
{
|
|
ngx_http_memcached_loc_conf_t *mlcf = conf;
|
|
|
|
ngx_str_t *value;
|
|
ngx_url_t u;
|
|
ngx_http_core_loc_conf_t *clcf;
|
|
|
|
if (mlcf->upstream.upstream) {
|
|
return "is duplicate";
|
|
}
|
|
|
|
value = cf->args->elts;
|
|
|
|
ngx_memzero(&u, sizeof(ngx_url_t));
|
|
|
|
u.url = value[1];
|
|
u.no_resolve = 1;
|
|
|
|
mlcf->upstream.upstream = ngx_http_upstream_add(cf, &u, 0);
|
|
if (mlcf->upstream.upstream == NULL) {
|
|
return NGX_CONF_ERROR;
|
|
}
|
|
|
|
clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
|
|
|
|
clcf->handler = ngx_http_memcached_handler;
|
|
|
|
if (clcf->name.data[clcf->name.len - 1] == '/') {
|
|
clcf->auto_redirect = 1;
|
|
}
|
|
|
|
mlcf->index = ngx_http_get_variable_index(cf, &ngx_http_memcached_key);
|
|
|
|
if (mlcf->index == NGX_ERROR) {
|
|
return NGX_CONF_ERROR;
|
|
}
|
|
|
|
return NGX_CONF_OK;
|
|
}
|