Mercurial > hg > nginx
view src/stream/ngx_stream_set_module.c @ 9263:388a801e9bb9 default tip
Request body: discarded body now treated as no body.
Notably, proxying of such requests now uses no Content-Length instead
of "Content-Length: 0", and the $content_length variable is empty (instead
of "0").
This might be beneficial from correctness point of view, since requests
with discarded body, such as during processing of error pages, do not pretend
there is a zero-length body, but instead do not contain body at all. For
example, this might be important for PUT requests, where a zero-length
body could be incorrectly interpreted as a real request body.
This also slightly simplifies the code.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Sat, 27 Apr 2024 18:23:52 +0300 |
parents | 45e9281c6c5b |
children |
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/* * Copyright (C) Pavel Pautov * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_stream.h> typedef struct { ngx_int_t index; ngx_stream_set_variable_pt set_handler; uintptr_t data; ngx_stream_complex_value_t value; } ngx_stream_set_cmd_t; typedef struct { ngx_array_t commands; } ngx_stream_set_srv_conf_t; static ngx_int_t ngx_stream_set_handler(ngx_stream_session_t *s); static ngx_int_t ngx_stream_set_var(ngx_stream_session_t *s, ngx_stream_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_stream_set_init(ngx_conf_t *cf); static void *ngx_stream_set_create_srv_conf(ngx_conf_t *cf); static char *ngx_stream_set(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static ngx_command_t ngx_stream_set_commands[] = { { ngx_string("set"), NGX_STREAM_SRV_CONF|NGX_CONF_TAKE2, ngx_stream_set, NGX_STREAM_SRV_CONF_OFFSET, 0, NULL }, ngx_null_command }; static ngx_stream_module_t ngx_stream_set_module_ctx = { NULL, /* preconfiguration */ ngx_stream_set_init, /* postconfiguration */ NULL, /* create main configuration */ NULL, /* init main configuration */ ngx_stream_set_create_srv_conf, /* create server configuration */ NULL /* merge server configuration */ }; ngx_module_t ngx_stream_set_module = { NGX_MODULE_V1, &ngx_stream_set_module_ctx, /* module context */ ngx_stream_set_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 ngx_int_t ngx_stream_set_handler(ngx_stream_session_t *s) { ngx_str_t str; ngx_uint_t i; ngx_stream_set_cmd_t *cmds; ngx_stream_set_srv_conf_t *scf; ngx_stream_variable_value_t vv; scf = ngx_stream_get_module_srv_conf(s, ngx_stream_set_module); cmds = scf->commands.elts; vv = ngx_stream_variable_null_value; for (i = 0; i < scf->commands.nelts; i++) { if (ngx_stream_complex_value(s, &cmds[i].value, &str) != NGX_OK) { return NGX_ERROR; } if (cmds[i].set_handler != NULL) { vv.len = str.len; vv.data = str.data; cmds[i].set_handler(s, &vv, cmds[i].data); } else { s->variables[cmds[i].index].len = str.len; s->variables[cmds[i].index].valid = 1; s->variables[cmds[i].index].no_cacheable = 0; s->variables[cmds[i].index].not_found = 0; s->variables[cmds[i].index].data = str.data; } } return NGX_DECLINED; } static ngx_int_t ngx_stream_set_var(ngx_stream_session_t *s, ngx_stream_variable_value_t *v, uintptr_t data) { *v = ngx_stream_variable_null_value; return NGX_OK; } static ngx_int_t ngx_stream_set_init(ngx_conf_t *cf) { ngx_stream_handler_pt *h; ngx_stream_core_main_conf_t *cmcf; cmcf = ngx_stream_conf_get_module_main_conf(cf, ngx_stream_core_module); h = ngx_array_push(&cmcf->phases[NGX_STREAM_PREACCESS_PHASE].handlers); if (h == NULL) { return NGX_ERROR; } *h = ngx_stream_set_handler; return NGX_OK; } static void * ngx_stream_set_create_srv_conf(ngx_conf_t *cf) { ngx_stream_set_srv_conf_t *conf; conf = ngx_pcalloc(cf->pool, sizeof(ngx_stream_set_srv_conf_t)); if (conf == NULL) { return NULL; } /* * set by ngx_pcalloc(): * * conf->commands = { NULL }; */ return conf; } static char * ngx_stream_set(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_stream_set_srv_conf_t *scf = conf; ngx_str_t *args; ngx_int_t index; ngx_stream_set_cmd_t *set_cmd; ngx_stream_variable_t *v; ngx_stream_compile_complex_value_t ccv; args = cf->args->elts; if (args[1].data[0] != '$') { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid variable name \"%V\"", &args[1]); return NGX_CONF_ERROR; } args[1].len--; args[1].data++; v = ngx_stream_add_variable(cf, &args[1], NGX_STREAM_VAR_CHANGEABLE|NGX_STREAM_VAR_WEAK); if (v == NULL) { return NGX_CONF_ERROR; } index = ngx_stream_get_variable_index(cf, &args[1]); if (index == NGX_ERROR) { return NGX_CONF_ERROR; } if (v->get_handler == NULL) { v->get_handler = ngx_stream_set_var; } if (scf->commands.elts == NULL) { if (ngx_array_init(&scf->commands, cf->pool, 1, sizeof(ngx_stream_set_cmd_t)) != NGX_OK) { return NGX_CONF_ERROR; } } set_cmd = ngx_array_push(&scf->commands); if (set_cmd == NULL) { return NGX_CONF_ERROR; } set_cmd->index = index; set_cmd->set_handler = v->set_handler; set_cmd->data = v->data; ngx_memzero(&ccv, sizeof(ngx_stream_compile_complex_value_t)); ccv.cf = cf; ccv.value = &args[2]; ccv.complex_value = &set_cmd->value; if (ngx_stream_compile_complex_value(&ccv) != NGX_OK) { return NGX_CONF_ERROR; } return NGX_CONF_OK; }