Mercurial > hg > nginx
view src/http/modules/ngx_http_rewrite_module.c @ 6874:7cc2d3a96ea3
Fixed trailer construction with limit on FreeBSD and macOS.
The ngx_chain_coalesce_file() function may produce more bytes to send then
requested in the limit passed, as it aligns the last file position
to send to memory page boundary. As a result, (limit - send) may become
negative. This resulted in big positive number when converted to size_t
while calling ngx_output_chain_to_iovec().
Another part of the problem is in ngx_chain_coalesce_file(): it changes cl
to the next chain link even if the current buffer is only partially sent
due to limit.
Therefore, if a file buffer was not expected to be fully sent due to limit,
and was followed by a memory buffer, nginx called sendfile() with a part
of the file buffer, and the memory buffer in trailer. If there were enough
room in the socket buffer, this resulted in a part of the file buffer being
skipped, and corresponding part of the memory buffer sent instead.
The bug was introduced in 8e903522c17a (1.7.8). Configurations affected
are ones using limits, that is, limit_rate and/or sendfile_max_chunk, and
memory buffers after file ones (may happen when using subrequests or
with proxying with disk buffering).
Fix is to explicitly check if (send < limit) before constructing trailer
with ngx_output_chain_to_iovec(). Additionally, ngx_chain_coalesce_file()
was modified to preserve unfinished file buffers in cl.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Fri, 20 Jan 2017 21:12:48 +0300 |
parents | 2cd019520210 |
children | d2b2ff157da5 |
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); } if (e->status < NGX_HTTP_BAD_REQUEST) { return e->status; } if (r->err_status == 0) { return e->status; } return r->err_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); 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 && ngx_strncasecmp(value[1].data, (u_char *) "http_", 5) != 0 && ngx_strncasecmp(value[1].data, (u_char *) "sent_http_", 10) != 0 && ngx_strncasecmp(value[1].data, (u_char *) "upstream_http_", 14) != 0 && ngx_strncasecmp(value[1].data, (u_char *) "cookie_", 7) != 0 && ngx_strncasecmp(value[1].data, (u_char *) "upstream_cookie_", 16) != 0 && ngx_strncasecmp(value[1].data, (u_char *) "arg_", 4) != 0) { 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; }