Mercurial > hg > nginx
view src/http/modules/ngx_http_rewrite_module.c @ 7508:c30a20e06c21
Range filter: fixed duplicate last buffers.
In ngx_http_range_singlepart_body() special buffers where passed
unmodified, including ones after the end of the range. As such,
if the last buffer of a response was sent separately as a special
buffer, two buffers with b->last_buf set were present in the response.
In particular, this might result in a duplicate final chunk when using
chunked transfer encoding (normally range filter and chunked transfer
encoding are not used together, but this may happen if there are trailers
in the response). This also likely to cause problems in HTTP/2.
Fix is to skip all special buffers after we've sent the last part of
the range requested. These special buffers are not meaningful anyway,
since we set b->last_buf in the buffer with the last part of the range,
and everything is expected to be flushed due to it.
Additionally, ngx_http_next_body_filter() is now called even
if no buffers are to be passed to it. This ensures that various
write events are properly propagated through the filter chain. In
particular, this fixes test failures observed with the above change
and aio enabled.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Mon, 13 May 2019 22:44:49 +0300 |
parents | b64adc956643 |
children | db8df9cd84c8 |
line wrap: on
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/* * 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; 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; }