Mercurial > hg > nginx
view src/http/modules/ngx_http_rewrite_module.c @ 9299:2706b60dc225 default tip
Core: error logging rate limiting.
With this change, error logging to files can be rate-limited with
the "rate=" parameter. The parameter specifies allowed log messages
rate to a particular file (per worker), in messages per second (m/s).
By default, "rate=1000m/s" is used.
Rate limiting is implemented using the "leaky bucket" method, similarly
to the limit_req module.
Maximum burst size is set to the number of log messages per second
for each severity level, so "error" messages are logged even if the
rate limit is hit by "info" messages (but not vice versa). When the
limit is reached for a particular level, the "too many log messages,
limiting" message is logged at this level.
If debug logging is enabled, either for the particular log file or for
the particular connection, rate limiting is not used.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Tue, 25 Jun 2024 22:58:56 +0300 |
parents | db8df9cd84c8 |
children |
line wrap: on
line source
/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_http.h> typedef struct { ngx_array_t *codes; /* uintptr_t */ ngx_uint_t stack_size; ngx_flag_t log; ngx_flag_t uninitialized_variable_warn; } ngx_http_rewrite_loc_conf_t; static void *ngx_http_rewrite_create_loc_conf(ngx_conf_t *cf); static char *ngx_http_rewrite_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child); static ngx_int_t ngx_http_rewrite_init(ngx_conf_t *cf); static char *ngx_http_rewrite(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static char *ngx_http_rewrite_return(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static char *ngx_http_rewrite_break(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static char *ngx_http_rewrite_if(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static char * ngx_http_rewrite_if_condition(ngx_conf_t *cf, ngx_http_rewrite_loc_conf_t *lcf); static char *ngx_http_rewrite_variable(ngx_conf_t *cf, ngx_http_rewrite_loc_conf_t *lcf, ngx_str_t *value); static char *ngx_http_rewrite_set(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static char * ngx_http_rewrite_value(ngx_conf_t *cf, ngx_http_rewrite_loc_conf_t *lcf, ngx_str_t *value); static ngx_command_t ngx_http_rewrite_commands[] = { { ngx_string("rewrite"), NGX_HTTP_SRV_CONF|NGX_HTTP_SIF_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF |NGX_CONF_TAKE23, ngx_http_rewrite, NGX_HTTP_LOC_CONF_OFFSET, 0, NULL }, { ngx_string("return"), NGX_HTTP_SRV_CONF|NGX_HTTP_SIF_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF |NGX_CONF_TAKE12, ngx_http_rewrite_return, NGX_HTTP_LOC_CONF_OFFSET, 0, NULL }, { ngx_string("break"), NGX_HTTP_SRV_CONF|NGX_HTTP_SIF_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF |NGX_CONF_NOARGS, ngx_http_rewrite_break, NGX_HTTP_LOC_CONF_OFFSET, 0, NULL }, { ngx_string("if"), NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_BLOCK|NGX_CONF_1MORE, ngx_http_rewrite_if, NGX_HTTP_LOC_CONF_OFFSET, 0, NULL }, { ngx_string("set"), NGX_HTTP_SRV_CONF|NGX_HTTP_SIF_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF |NGX_CONF_TAKE2, ngx_http_rewrite_set, NGX_HTTP_LOC_CONF_OFFSET, 0, NULL }, { ngx_string("rewrite_log"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_SIF_CONF|NGX_HTTP_LOC_CONF |NGX_HTTP_LIF_CONF|NGX_CONF_FLAG, ngx_conf_set_flag_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_rewrite_loc_conf_t, log), NULL }, { ngx_string("uninitialized_variable_warn"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_SIF_CONF|NGX_HTTP_LOC_CONF |NGX_HTTP_LIF_CONF|NGX_CONF_FLAG, ngx_conf_set_flag_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_rewrite_loc_conf_t, uninitialized_variable_warn), NULL }, ngx_null_command }; static ngx_http_module_t ngx_http_rewrite_module_ctx = { NULL, /* preconfiguration */ ngx_http_rewrite_init, /* postconfiguration */ NULL, /* create main configuration */ NULL, /* init main configuration */ NULL, /* create server configuration */ NULL, /* merge server configuration */ ngx_http_rewrite_create_loc_conf, /* create location configuration */ ngx_http_rewrite_merge_loc_conf /* merge location configuration */ }; ngx_module_t ngx_http_rewrite_module = { NGX_MODULE_V1, &ngx_http_rewrite_module_ctx, /* module context */ ngx_http_rewrite_commands, /* module directives */ NGX_HTTP_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_http_rewrite_handler(ngx_http_request_t *r) { ngx_int_t index; ngx_http_script_code_pt code; ngx_http_script_engine_t *e; ngx_http_core_srv_conf_t *cscf; ngx_http_core_main_conf_t *cmcf; ngx_http_rewrite_loc_conf_t *rlcf; cmcf = ngx_http_get_module_main_conf(r, ngx_http_core_module); cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module); index = cmcf->phase_engine.location_rewrite_index; if (r->phase_handler == index && r->loc_conf == cscf->ctx->loc_conf) { /* skipping location rewrite phase for server null location */ return NGX_DECLINED; } rlcf = ngx_http_get_module_loc_conf(r, ngx_http_rewrite_module); if (rlcf->codes == NULL) { return NGX_DECLINED; } e = ngx_pcalloc(r->pool, sizeof(ngx_http_script_engine_t)); if (e == NULL) { return NGX_HTTP_INTERNAL_SERVER_ERROR; } e->sp = ngx_pcalloc(r->pool, rlcf->stack_size * sizeof(ngx_http_variable_value_t)); if (e->sp == NULL) { return NGX_HTTP_INTERNAL_SERVER_ERROR; } e->ip = rlcf->codes->elts; e->request = r; e->quote = 1; e->log = rlcf->log; e->status = NGX_DECLINED; while (*(uintptr_t *) e->ip) { code = *(ngx_http_script_code_pt *) e->ip; code(e); } return e->status; } static ngx_int_t ngx_http_rewrite_var(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { ngx_http_variable_t *var; ngx_http_core_main_conf_t *cmcf; ngx_http_rewrite_loc_conf_t *rlcf; rlcf = ngx_http_get_module_loc_conf(r, ngx_http_rewrite_module); if (rlcf->uninitialized_variable_warn == 0) { *v = ngx_http_variable_null_value; return NGX_OK; } cmcf = ngx_http_get_module_main_conf(r, ngx_http_core_module); var = cmcf->variables.elts; /* * the ngx_http_rewrite_module sets variables directly in r->variables, * and they should be handled by ngx_http_get_indexed_variable(), * so the handler is called only if the variable is not initialized */ ngx_log_error(NGX_LOG_WARN, r->connection->log, 0, "using uninitialized \"%V\" variable", &var[data].name); *v = ngx_http_variable_null_value; return NGX_OK; } static void * ngx_http_rewrite_create_loc_conf(ngx_conf_t *cf) { ngx_http_rewrite_loc_conf_t *conf; conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_rewrite_loc_conf_t)); if (conf == NULL) { return NULL; } conf->stack_size = NGX_CONF_UNSET_UINT; conf->log = NGX_CONF_UNSET; conf->uninitialized_variable_warn = NGX_CONF_UNSET; return conf; } static char * ngx_http_rewrite_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child) { ngx_http_rewrite_loc_conf_t *prev = parent; ngx_http_rewrite_loc_conf_t *conf = child; uintptr_t *code; ngx_conf_merge_value(conf->log, prev->log, 0); ngx_conf_merge_value(conf->uninitialized_variable_warn, prev->uninitialized_variable_warn, 1); ngx_conf_merge_uint_value(conf->stack_size, prev->stack_size, 10); if (conf->codes == NULL) { return NGX_CONF_OK; } if (conf->codes == prev->codes) { return NGX_CONF_OK; } code = ngx_array_push_n(conf->codes, sizeof(uintptr_t)); if (code == NULL) { return NGX_CONF_ERROR; } *code = (uintptr_t) NULL; return NGX_CONF_OK; } static ngx_int_t ngx_http_rewrite_init(ngx_conf_t *cf) { ngx_http_handler_pt *h; ngx_http_core_main_conf_t *cmcf; cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); h = ngx_array_push(&cmcf->phases[NGX_HTTP_SERVER_REWRITE_PHASE].handlers); if (h == NULL) { return NGX_ERROR; } *h = ngx_http_rewrite_handler; h = ngx_array_push(&cmcf->phases[NGX_HTTP_REWRITE_PHASE].handlers); if (h == NULL) { return NGX_ERROR; } *h = ngx_http_rewrite_handler; return NGX_OK; } static char * ngx_http_rewrite(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_http_rewrite_loc_conf_t *lcf = conf; ngx_str_t *value; ngx_uint_t last; ngx_regex_compile_t rc; ngx_http_script_code_pt *code; ngx_http_script_compile_t sc; ngx_http_script_regex_code_t *regex; ngx_http_script_regex_end_code_t *regex_end; u_char errstr[NGX_MAX_CONF_ERRSTR]; regex = ngx_http_script_start_code(cf->pool, &lcf->codes, sizeof(ngx_http_script_regex_code_t)); if (regex == NULL) { return NGX_CONF_ERROR; } ngx_memzero(regex, sizeof(ngx_http_script_regex_code_t)); value = cf->args->elts; if (value[2].len == 0) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "empty replacement"); return NGX_CONF_ERROR; } ngx_memzero(&rc, sizeof(ngx_regex_compile_t)); rc.pattern = value[1]; rc.err.len = NGX_MAX_CONF_ERRSTR; rc.err.data = errstr; /* TODO: NGX_REGEX_CASELESS */ regex->regex = ngx_http_regex_compile(cf, &rc); if (regex->regex == NULL) { return NGX_CONF_ERROR; } regex->code = ngx_http_script_regex_start_code; regex->uri = 1; regex->name = value[1]; if (value[2].data[value[2].len - 1] == '?') { /* the last "?" drops the original arguments */ value[2].len--; } else { regex->add_args = 1; } last = 0; if (ngx_strncmp(value[2].data, "http://", sizeof("http://") - 1) == 0 || ngx_strncmp(value[2].data, "https://", sizeof("https://") - 1) == 0 || ngx_strncmp(value[2].data, "$scheme", sizeof("$scheme") - 1) == 0) { regex->status = NGX_HTTP_MOVED_TEMPORARILY; regex->redirect = 1; last = 1; } if (cf->args->nelts == 4) { if (ngx_strcmp(value[3].data, "last") == 0) { last = 1; } else if (ngx_strcmp(value[3].data, "break") == 0) { regex->break_cycle = 1; last = 1; } else if (ngx_strcmp(value[3].data, "redirect") == 0) { regex->status = NGX_HTTP_MOVED_TEMPORARILY; regex->redirect = 1; last = 1; } else if (ngx_strcmp(value[3].data, "permanent") == 0) { regex->status = NGX_HTTP_MOVED_PERMANENTLY; regex->redirect = 1; last = 1; } else { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid parameter \"%V\"", &value[3]); return NGX_CONF_ERROR; } } ngx_memzero(&sc, sizeof(ngx_http_script_compile_t)); sc.cf = cf; sc.source = &value[2]; sc.lengths = ®ex->lengths; sc.values = &lcf->codes; sc.variables = ngx_http_script_variables_count(&value[2]); sc.main = regex; sc.complete_lengths = 1; sc.compile_args = !regex->redirect; if (ngx_http_script_compile(&sc) != NGX_OK) { return NGX_CONF_ERROR; } regex = sc.main; regex->size = sc.size; regex->args = sc.args; if (sc.variables == 0 && !sc.dup_capture) { regex->lengths = NULL; } regex_end = ngx_http_script_add_code(lcf->codes, sizeof(ngx_http_script_regex_end_code_t), ®ex); if (regex_end == NULL) { return NGX_CONF_ERROR; } regex_end->code = ngx_http_script_regex_end_code; regex_end->uri = regex->uri; regex_end->args = regex->args; regex_end->add_args = regex->add_args; regex_end->redirect = regex->redirect; if (last) { code = ngx_http_script_add_code(lcf->codes, sizeof(uintptr_t), ®ex); if (code == NULL) { return NGX_CONF_ERROR; } *code = NULL; } regex->next = (u_char *) lcf->codes->elts + lcf->codes->nelts - (u_char *) regex; return NGX_CONF_OK; } static char * ngx_http_rewrite_return(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_http_rewrite_loc_conf_t *lcf = conf; u_char *p; ngx_str_t *value, *v; ngx_http_script_return_code_t *ret; ngx_http_compile_complex_value_t ccv; ret = ngx_http_script_start_code(cf->pool, &lcf->codes, sizeof(ngx_http_script_return_code_t)); if (ret == NULL) { return NGX_CONF_ERROR; } value = cf->args->elts; ngx_memzero(ret, sizeof(ngx_http_script_return_code_t)); ret->code = ngx_http_script_return_code; p = value[1].data; ret->status = ngx_atoi(p, value[1].len); if (ret->status == (uintptr_t) NGX_ERROR) { if (cf->args->nelts == 2 && (ngx_strncmp(p, "http://", sizeof("http://") - 1) == 0 || ngx_strncmp(p, "https://", sizeof("https://") - 1) == 0 || ngx_strncmp(p, "$scheme", sizeof("$scheme") - 1) == 0)) { ret->status = NGX_HTTP_MOVED_TEMPORARILY; v = &value[1]; } else { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid return code \"%V\"", &value[1]); return NGX_CONF_ERROR; } } else { if (ret->status > 999) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid return code \"%V\"", &value[1]); return NGX_CONF_ERROR; } if (cf->args->nelts == 2) { return NGX_CONF_OK; } v = &value[2]; } ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); ccv.cf = cf; ccv.value = v; ccv.complex_value = &ret->text; if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { return NGX_CONF_ERROR; } return NGX_CONF_OK; } static char * ngx_http_rewrite_break(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_http_rewrite_loc_conf_t *lcf = conf; ngx_http_script_code_pt *code; code = ngx_http_script_start_code(cf->pool, &lcf->codes, sizeof(uintptr_t)); if (code == NULL) { return NGX_CONF_ERROR; } *code = ngx_http_script_break_code; return NGX_CONF_OK; } static char * ngx_http_rewrite_if(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_http_rewrite_loc_conf_t *lcf = conf; void *mconf; char *rv; u_char *elts; ngx_uint_t i; ngx_conf_t save; ngx_http_module_t *module; ngx_http_conf_ctx_t *ctx, *pctx; ngx_http_core_loc_conf_t *clcf, *pclcf; ngx_http_script_if_code_t *if_code; ngx_http_rewrite_loc_conf_t *nlcf; ctx = ngx_pcalloc(cf->pool, sizeof(ngx_http_conf_ctx_t)); if (ctx == NULL) { return NGX_CONF_ERROR; } pctx = cf->ctx; ctx->main_conf = pctx->main_conf; ctx->srv_conf = pctx->srv_conf; ctx->loc_conf = ngx_pcalloc(cf->pool, sizeof(void *) * ngx_http_max_module); if (ctx->loc_conf == NULL) { return NGX_CONF_ERROR; } for (i = 0; cf->cycle->modules[i]; i++) { if (cf->cycle->modules[i]->type != NGX_HTTP_MODULE) { continue; } module = cf->cycle->modules[i]->ctx; if (module->create_loc_conf) { mconf = module->create_loc_conf(cf); if (mconf == NULL) { return NGX_CONF_ERROR; } ctx->loc_conf[cf->cycle->modules[i]->ctx_index] = mconf; } } pclcf = pctx->loc_conf[ngx_http_core_module.ctx_index]; clcf = ctx->loc_conf[ngx_http_core_module.ctx_index]; clcf->loc_conf = ctx->loc_conf; clcf->name = pclcf->name; clcf->noname = 1; if (ngx_http_add_location(cf, &pclcf->locations, clcf) != NGX_OK) { return NGX_CONF_ERROR; } if (ngx_http_rewrite_if_condition(cf, lcf) != NGX_CONF_OK) { return NGX_CONF_ERROR; } if_code = ngx_array_push_n(lcf->codes, sizeof(ngx_http_script_if_code_t)); if (if_code == NULL) { return NGX_CONF_ERROR; } if_code->code = ngx_http_script_if_code; elts = lcf->codes->elts; /* the inner directives must be compiled to the same code array */ nlcf = ctx->loc_conf[ngx_http_rewrite_module.ctx_index]; nlcf->codes = lcf->codes; save = *cf; cf->ctx = ctx; if (cf->cmd_type == NGX_HTTP_SRV_CONF) { if_code->loc_conf = NULL; cf->cmd_type = NGX_HTTP_SIF_CONF; } else { if_code->loc_conf = ctx->loc_conf; cf->cmd_type = NGX_HTTP_LIF_CONF; } rv = ngx_conf_parse(cf, NULL); *cf = save; if (rv != NGX_CONF_OK) { return rv; } if (elts != lcf->codes->elts) { if_code = (ngx_http_script_if_code_t *) ((u_char *) if_code + ((u_char *) lcf->codes->elts - elts)); } if_code->next = (u_char *) lcf->codes->elts + lcf->codes->nelts - (u_char *) if_code; /* the code array belong to parent block */ nlcf->codes = NULL; return NGX_CONF_OK; } static char * ngx_http_rewrite_if_condition(ngx_conf_t *cf, ngx_http_rewrite_loc_conf_t *lcf) { u_char *p; size_t len; ngx_str_t *value; ngx_uint_t cur, last; ngx_regex_compile_t rc; ngx_http_script_code_pt *code; ngx_http_script_file_code_t *fop; ngx_http_script_regex_code_t *regex; u_char errstr[NGX_MAX_CONF_ERRSTR]; value = cf->args->elts; last = cf->args->nelts - 1; if (value[1].len < 1 || value[1].data[0] != '(') { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid condition \"%V\"", &value[1]); return NGX_CONF_ERROR; } if (value[1].len == 1) { cur = 2; } else { cur = 1; value[1].len--; value[1].data++; } if (value[last].len < 1 || value[last].data[value[last].len - 1] != ')') { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid condition \"%V\"", &value[last]); return NGX_CONF_ERROR; } if (value[last].len == 1) { last--; } else { value[last].len--; value[last].data[value[last].len] = '\0'; } len = value[cur].len; p = value[cur].data; if (len > 1 && p[0] == '$') { if (cur != last && cur + 2 != last) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid condition \"%V\"", &value[cur]); return NGX_CONF_ERROR; } if (ngx_http_rewrite_variable(cf, lcf, &value[cur]) != NGX_CONF_OK) { return NGX_CONF_ERROR; } if (cur == last) { return NGX_CONF_OK; } cur++; len = value[cur].len; p = value[cur].data; if (len == 1 && p[0] == '=') { if (ngx_http_rewrite_value(cf, lcf, &value[last]) != NGX_CONF_OK) { return NGX_CONF_ERROR; } code = ngx_http_script_start_code(cf->pool, &lcf->codes, sizeof(uintptr_t)); if (code == NULL) { return NGX_CONF_ERROR; } *code = ngx_http_script_equal_code; return NGX_CONF_OK; } if (len == 2 && p[0] == '!' && p[1] == '=') { if (ngx_http_rewrite_value(cf, lcf, &value[last]) != NGX_CONF_OK) { return NGX_CONF_ERROR; } code = ngx_http_script_start_code(cf->pool, &lcf->codes, sizeof(uintptr_t)); if (code == NULL) { return NGX_CONF_ERROR; } *code = ngx_http_script_not_equal_code; return NGX_CONF_OK; } if ((len == 1 && p[0] == '~') || (len == 2 && p[0] == '~' && p[1] == '*') || (len == 2 && p[0] == '!' && p[1] == '~') || (len == 3 && p[0] == '!' && p[1] == '~' && p[2] == '*')) { regex = ngx_http_script_start_code(cf->pool, &lcf->codes, sizeof(ngx_http_script_regex_code_t)); if (regex == NULL) { return NGX_CONF_ERROR; } ngx_memzero(regex, sizeof(ngx_http_script_regex_code_t)); ngx_memzero(&rc, sizeof(ngx_regex_compile_t)); rc.pattern = value[last]; rc.options = (p[len - 1] == '*') ? NGX_REGEX_CASELESS : 0; rc.err.len = NGX_MAX_CONF_ERRSTR; rc.err.data = errstr; regex->regex = ngx_http_regex_compile(cf, &rc); if (regex->regex == NULL) { return NGX_CONF_ERROR; } regex->code = ngx_http_script_regex_start_code; regex->next = sizeof(ngx_http_script_regex_code_t); regex->test = 1; if (p[0] == '!') { regex->negative_test = 1; } regex->name = value[last]; return NGX_CONF_OK; } ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "unexpected \"%V\" in condition", &value[cur]); return NGX_CONF_ERROR; } else if ((len == 2 && p[0] == '-') || (len == 3 && p[0] == '!' && p[1] == '-')) { if (cur + 1 != last) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid condition \"%V\"", &value[cur]); return NGX_CONF_ERROR; } value[last].data[value[last].len] = '\0'; value[last].len++; if (ngx_http_rewrite_value(cf, lcf, &value[last]) != NGX_CONF_OK) { return NGX_CONF_ERROR; } fop = ngx_http_script_start_code(cf->pool, &lcf->codes, sizeof(ngx_http_script_file_code_t)); if (fop == NULL) { return NGX_CONF_ERROR; } fop->code = ngx_http_script_file_code; if (p[1] == 'f') { fop->op = ngx_http_script_file_plain; return NGX_CONF_OK; } if (p[1] == 'd') { fop->op = ngx_http_script_file_dir; return NGX_CONF_OK; } if (p[1] == 'e') { fop->op = ngx_http_script_file_exists; return NGX_CONF_OK; } if (p[1] == 'x') { fop->op = ngx_http_script_file_exec; return NGX_CONF_OK; } if (p[0] == '!') { if (p[2] == 'f') { fop->op = ngx_http_script_file_not_plain; return NGX_CONF_OK; } if (p[2] == 'd') { fop->op = ngx_http_script_file_not_dir; return NGX_CONF_OK; } if (p[2] == 'e') { fop->op = ngx_http_script_file_not_exists; return NGX_CONF_OK; } if (p[2] == 'x') { fop->op = ngx_http_script_file_not_exec; return NGX_CONF_OK; } } ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid condition \"%V\"", &value[cur]); return NGX_CONF_ERROR; } ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid condition \"%V\"", &value[cur]); return NGX_CONF_ERROR; } static char * ngx_http_rewrite_variable(ngx_conf_t *cf, ngx_http_rewrite_loc_conf_t *lcf, ngx_str_t *value) { ngx_int_t index; ngx_http_script_var_code_t *var_code; value->len--; value->data++; index = ngx_http_get_variable_index(cf, value); if (index == NGX_ERROR) { return NGX_CONF_ERROR; } var_code = ngx_http_script_start_code(cf->pool, &lcf->codes, sizeof(ngx_http_script_var_code_t)); if (var_code == NULL) { return NGX_CONF_ERROR; } var_code->code = ngx_http_script_var_code; var_code->index = index; return NGX_CONF_OK; } static char * ngx_http_rewrite_set(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_http_rewrite_loc_conf_t *lcf = conf; ngx_int_t index; ngx_str_t *value; ngx_http_variable_t *v; ngx_http_script_var_code_t *vcode; ngx_http_script_var_handler_code_t *vhcode; value = cf->args->elts; if (value[1].data[0] != '$') { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid variable name \"%V\"", &value[1]); return NGX_CONF_ERROR; } value[1].len--; value[1].data++; v = ngx_http_add_variable(cf, &value[1], NGX_HTTP_VAR_CHANGEABLE|NGX_HTTP_VAR_WEAK); if (v == NULL) { return NGX_CONF_ERROR; } index = ngx_http_get_variable_index(cf, &value[1]); if (index == NGX_ERROR) { return NGX_CONF_ERROR; } if (v->get_handler == NULL) { v->get_handler = ngx_http_rewrite_var; v->data = index; } if (ngx_http_rewrite_value(cf, lcf, &value[2]) != NGX_CONF_OK) { return NGX_CONF_ERROR; } if (v->set_handler) { vhcode = ngx_http_script_start_code(cf->pool, &lcf->codes, sizeof(ngx_http_script_var_handler_code_t)); if (vhcode == NULL) { return NGX_CONF_ERROR; } vhcode->code = ngx_http_script_var_set_handler_code; vhcode->handler = v->set_handler; vhcode->data = v->data; return NGX_CONF_OK; } vcode = ngx_http_script_start_code(cf->pool, &lcf->codes, sizeof(ngx_http_script_var_code_t)); if (vcode == NULL) { return NGX_CONF_ERROR; } vcode->code = ngx_http_script_set_var_code; vcode->index = (uintptr_t) index; return NGX_CONF_OK; } static char * ngx_http_rewrite_value(ngx_conf_t *cf, ngx_http_rewrite_loc_conf_t *lcf, ngx_str_t *value) { ngx_int_t n; ngx_http_script_compile_t sc; ngx_http_script_value_code_t *val; ngx_http_script_complex_value_code_t *complex; n = ngx_http_script_variables_count(value); if (n == 0) { val = ngx_http_script_start_code(cf->pool, &lcf->codes, sizeof(ngx_http_script_value_code_t)); if (val == NULL) { return NGX_CONF_ERROR; } n = ngx_atoi(value->data, value->len); if (n == NGX_ERROR) { n = 0; } val->code = ngx_http_script_value_code; val->value = (uintptr_t) n; val->text_len = (uintptr_t) value->len; val->text_data = (uintptr_t) value->data; return NGX_CONF_OK; } complex = ngx_http_script_start_code(cf->pool, &lcf->codes, sizeof(ngx_http_script_complex_value_code_t)); if (complex == NULL) { return NGX_CONF_ERROR; } complex->code = ngx_http_script_complex_value_code; complex->lengths = NULL; ngx_memzero(&sc, sizeof(ngx_http_script_compile_t)); sc.cf = cf; sc.source = value; sc.lengths = &complex->lengths; sc.values = &lcf->codes; sc.variables = n; sc.complete_lengths = 1; if (ngx_http_script_compile(&sc) != NGX_OK) { return NGX_CONF_ERROR; } return NGX_CONF_OK; }