diff options
Diffstat (limited to 'src/stream/ngx_stream_set_module.c')
| -rw-r--r-- | src/stream/ngx_stream_set_module.c | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/src/stream/ngx_stream_set_module.c b/src/stream/ngx_stream_set_module.c new file mode 100644 index 000000000..9b34a6099 --- /dev/null +++ b/src/stream/ngx_stream_set_module.c @@ -0,0 +1,226 @@ + +/* + * 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; +} |