Mercurial > hg > nginx-quic
view src/stream/ngx_stream_upstream.c @ 6749:f88a145b093e stable-1.10
HTTP/2: the "421 Misdirected Request" response (closes #848).
Since 4fbef397c753 nginx rejects with the 400 error any attempts of
requesting different host over the same connection, if the relevant
virtual server requires verification of a client certificate.
While requesting hosts other than negotiated isn't something legal
in HTTP/1.x, the HTTP/2 specification explicitly permits such requests
for connection reuse and has introduced a special response code 421.
According to RFC 7540 Section 9.1.2 this code can be sent by a server
that is not configured to produce responses for the combination of
scheme and authority that are included in the request URI. And the
client may retry the request over a different connection.
Now this code is used for requests that aren't authorized in current
connection. After receiving the 421 response a client will be able
to open a new connection, provide the required certificate and retry
the request.
Unfortunately, not all clients currently are able to handle it well.
Notably Chrome just shows an error, while at least the latest version
of Firefox retries the request over a new connection.
author | Valentin Bartenev <vbart@nginx.com> |
---|---|
date | Fri, 20 May 2016 18:41:17 +0300 |
parents | 78fc2dce69e7 |
children | 2f41d383c9c7 |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_stream.h> static char *ngx_stream_upstream(ngx_conf_t *cf, ngx_command_t *cmd, void *dummy); static char *ngx_stream_upstream_server(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static void *ngx_stream_upstream_create_main_conf(ngx_conf_t *cf); static char *ngx_stream_upstream_init_main_conf(ngx_conf_t *cf, void *conf); static ngx_command_t ngx_stream_upstream_commands[] = { { ngx_string("upstream"), NGX_STREAM_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_TAKE1, ngx_stream_upstream, 0, 0, NULL }, { ngx_string("server"), NGX_STREAM_UPS_CONF|NGX_CONF_1MORE, ngx_stream_upstream_server, NGX_STREAM_SRV_CONF_OFFSET, 0, NULL }, ngx_null_command }; static ngx_stream_module_t ngx_stream_upstream_module_ctx = { NULL, /* postconfiguration */ ngx_stream_upstream_create_main_conf, /* create main configuration */ ngx_stream_upstream_init_main_conf, /* init main configuration */ NULL, /* create server configuration */ NULL, /* merge server configuration */ }; ngx_module_t ngx_stream_upstream_module = { NGX_MODULE_V1, &ngx_stream_upstream_module_ctx, /* module context */ ngx_stream_upstream_commands, /* module directives */ NGX_STREAM_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 }; static char * ngx_stream_upstream(ngx_conf_t *cf, ngx_command_t *cmd, void *dummy) { char *rv; void *mconf; ngx_str_t *value; ngx_url_t u; ngx_uint_t m; ngx_conf_t pcf; ngx_stream_module_t *module; ngx_stream_conf_ctx_t *ctx, *stream_ctx; ngx_stream_upstream_srv_conf_t *uscf; ngx_memzero(&u, sizeof(ngx_url_t)); value = cf->args->elts; u.host = value[1]; u.no_resolve = 1; u.no_port = 1; uscf = ngx_stream_upstream_add(cf, &u, NGX_STREAM_UPSTREAM_CREATE |NGX_STREAM_UPSTREAM_WEIGHT |NGX_STREAM_UPSTREAM_MAX_FAILS |NGX_STREAM_UPSTREAM_FAIL_TIMEOUT |NGX_STREAM_UPSTREAM_DOWN |NGX_STREAM_UPSTREAM_BACKUP); if (uscf == NULL) { return NGX_CONF_ERROR; } ctx = ngx_pcalloc(cf->pool, sizeof(ngx_stream_conf_ctx_t)); if (ctx == NULL) { return NGX_CONF_ERROR; } stream_ctx = cf->ctx; ctx->main_conf = stream_ctx->main_conf; /* the upstream{}'s srv_conf */ ctx->srv_conf = ngx_pcalloc(cf->pool, sizeof(void *) * ngx_stream_max_module); if (ctx->srv_conf == NULL) { return NGX_CONF_ERROR; } ctx->srv_conf[ngx_stream_upstream_module.ctx_index] = uscf; uscf->srv_conf = ctx->srv_conf; for (m = 0; cf->cycle->modules[m]; m++) { if (cf->cycle->modules[m]->type != NGX_STREAM_MODULE) { continue; } module = cf->cycle->modules[m]->ctx; if (module->create_srv_conf) { mconf = module->create_srv_conf(cf); if (mconf == NULL) { return NGX_CONF_ERROR; } ctx->srv_conf[cf->cycle->modules[m]->ctx_index] = mconf; } } uscf->servers = ngx_array_create(cf->pool, 4, sizeof(ngx_stream_upstream_server_t)); if (uscf->servers == NULL) { return NGX_CONF_ERROR; } /* parse inside upstream{} */ pcf = *cf; cf->ctx = ctx; cf->cmd_type = NGX_STREAM_UPS_CONF; rv = ngx_conf_parse(cf, NULL); *cf = pcf; if (rv != NGX_CONF_OK) { return rv; } if (uscf->servers->nelts == 0) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "no servers are inside upstream"); return NGX_CONF_ERROR; } return rv; } static char * ngx_stream_upstream_server(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_stream_upstream_srv_conf_t *uscf = conf; time_t fail_timeout; ngx_str_t *value, s; ngx_url_t u; ngx_int_t weight, max_fails; ngx_uint_t i; ngx_stream_upstream_server_t *us; us = ngx_array_push(uscf->servers); if (us == NULL) { return NGX_CONF_ERROR; } ngx_memzero(us, sizeof(ngx_stream_upstream_server_t)); value = cf->args->elts; weight = 1; max_fails = 1; fail_timeout = 10; for (i = 2; i < cf->args->nelts; i++) { if (ngx_strncmp(value[i].data, "weight=", 7) == 0) { if (!(uscf->flags & NGX_STREAM_UPSTREAM_WEIGHT)) { goto not_supported; } weight = ngx_atoi(&value[i].data[7], value[i].len - 7); if (weight == NGX_ERROR || weight == 0) { goto invalid; } continue; } if (ngx_strncmp(value[i].data, "max_fails=", 10) == 0) { if (!(uscf->flags & NGX_STREAM_UPSTREAM_MAX_FAILS)) { goto not_supported; } max_fails = ngx_atoi(&value[i].data[10], value[i].len - 10); if (max_fails == NGX_ERROR) { goto invalid; } continue; } if (ngx_strncmp(value[i].data, "fail_timeout=", 13) == 0) { if (!(uscf->flags & NGX_STREAM_UPSTREAM_FAIL_TIMEOUT)) { goto not_supported; } s.len = value[i].len - 13; s.data = &value[i].data[13]; fail_timeout = ngx_parse_time(&s, 1); if (fail_timeout == (time_t) NGX_ERROR) { goto invalid; } continue; } if (ngx_strcmp(value[i].data, "backup") == 0) { if (!(uscf->flags & NGX_STREAM_UPSTREAM_BACKUP)) { goto not_supported; } us->backup = 1; continue; } if (ngx_strcmp(value[i].data, "down") == 0) { if (!(uscf->flags & NGX_STREAM_UPSTREAM_DOWN)) { goto not_supported; } us->down = 1; continue; } goto invalid; } ngx_memzero(&u, sizeof(ngx_url_t)); u.url = value[1]; if (ngx_parse_url(cf->pool, &u) != NGX_OK) { if (u.err) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "%s in upstream \"%V\"", u.err, &u.url); } return NGX_CONF_ERROR; } if (u.no_port) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "no port in upstream \"%V\"", &u.url); return NGX_CONF_ERROR; } us->name = u.url; us->addrs = u.addrs; us->naddrs = u.naddrs; us->weight = weight; us->max_fails = max_fails; us->fail_timeout = fail_timeout; return NGX_CONF_OK; invalid: ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid parameter \"%V\"", &value[i]); return NGX_CONF_ERROR; not_supported: ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "balancing method does not support parameter \"%V\"", &value[i]); return NGX_CONF_ERROR; } ngx_stream_upstream_srv_conf_t * ngx_stream_upstream_add(ngx_conf_t *cf, ngx_url_t *u, ngx_uint_t flags) { ngx_uint_t i; ngx_stream_upstream_server_t *us; ngx_stream_upstream_srv_conf_t *uscf, **uscfp; ngx_stream_upstream_main_conf_t *umcf; if (!(flags & NGX_STREAM_UPSTREAM_CREATE)) { if (ngx_parse_url(cf->pool, u) != NGX_OK) { if (u->err) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "%s in upstream \"%V\"", u->err, &u->url); } return NULL; } } umcf = ngx_stream_conf_get_module_main_conf(cf, ngx_stream_upstream_module); uscfp = umcf->upstreams.elts; for (i = 0; i < umcf->upstreams.nelts; i++) { if (uscfp[i]->host.len != u->host.len || ngx_strncasecmp(uscfp[i]->host.data, u->host.data, u->host.len) != 0) { continue; } if ((flags & NGX_STREAM_UPSTREAM_CREATE) && (uscfp[i]->flags & NGX_STREAM_UPSTREAM_CREATE)) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "duplicate upstream \"%V\"", &u->host); return NULL; } if ((uscfp[i]->flags & NGX_STREAM_UPSTREAM_CREATE) && !u->no_port) { ngx_conf_log_error(NGX_LOG_WARN, cf, 0, "upstream \"%V\" may not have port %d", &u->host, u->port); return NULL; } if ((flags & NGX_STREAM_UPSTREAM_CREATE) && !uscfp[i]->no_port) { ngx_log_error(NGX_LOG_WARN, cf->log, 0, "upstream \"%V\" may not have port %d in %s:%ui", &u->host, uscfp[i]->port, uscfp[i]->file_name, uscfp[i]->line); return NULL; } if (uscfp[i]->port != u->port) { continue; } if (flags & NGX_STREAM_UPSTREAM_CREATE) { uscfp[i]->flags = flags; } return uscfp[i]; } uscf = ngx_pcalloc(cf->pool, sizeof(ngx_stream_upstream_srv_conf_t)); if (uscf == NULL) { return NULL; } uscf->flags = flags; uscf->host = u->host; uscf->file_name = cf->conf_file->file.name.data; uscf->line = cf->conf_file->line; uscf->port = u->port; uscf->no_port = u->no_port; if (u->naddrs == 1 && (u->port || u->family == AF_UNIX)) { uscf->servers = ngx_array_create(cf->pool, 1, sizeof(ngx_stream_upstream_server_t)); if (uscf->servers == NULL) { return NULL; } us = ngx_array_push(uscf->servers); if (us == NULL) { return NULL; } ngx_memzero(us, sizeof(ngx_stream_upstream_server_t)); us->addrs = u->addrs; us->naddrs = 1; } uscfp = ngx_array_push(&umcf->upstreams); if (uscfp == NULL) { return NULL; } *uscfp = uscf; return uscf; } static void * ngx_stream_upstream_create_main_conf(ngx_conf_t *cf) { ngx_stream_upstream_main_conf_t *umcf; umcf = ngx_pcalloc(cf->pool, sizeof(ngx_stream_upstream_main_conf_t)); if (umcf == NULL) { return NULL; } if (ngx_array_init(&umcf->upstreams, cf->pool, 4, sizeof(ngx_stream_upstream_srv_conf_t *)) != NGX_OK) { return NULL; } return umcf; } static char * ngx_stream_upstream_init_main_conf(ngx_conf_t *cf, void *conf) { ngx_stream_upstream_main_conf_t *umcf = conf; ngx_uint_t i; ngx_stream_upstream_init_pt init; ngx_stream_upstream_srv_conf_t **uscfp; uscfp = umcf->upstreams.elts; for (i = 0; i < umcf->upstreams.nelts; i++) { init = uscfp[i]->peer.init_upstream ? uscfp[i]->peer.init_upstream : ngx_stream_upstream_init_round_robin; if (init(cf, uscfp[i]) != NGX_OK) { return NGX_CONF_ERROR; } } return NGX_CONF_OK; }