Mercurial > hg > nginx-vendor-current
view src/http/modules/ngx_http_ssi_filter_module.c @ 102:f63280c59dd5 NGINX_0_2_5
nginx 0.2.5
*) Change: the duplicate value of the ngx_http_geo_module variable now
causes the warning and changes old value.
*) Feature: the ngx_http_ssi_module supports the "set" command.
*) Feature: the ngx_http_ssi_module supports the "file" parameter in
the "include" command.
*) Feature: the ngx_http_ssi_module supports the variable value
substitutions in expressions of the "if" command.
author | Igor Sysoev <http://sysoev.ru> |
---|---|
date | Tue, 04 Oct 2005 00:00:00 +0400 |
parents | d6800bbe720e |
children | cf3d6edb3ad6 |
line wrap: on
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/* * Copyright (C) Igor Sysoev */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_http.h> #define NGX_HTTP_SSI_MAX_PARAMS 16 #define NGX_HTTP_SSI_COMMAND_LEN 31 #define NGX_HTTP_SSI_PARAM_LEN 31 #define NGX_HTTP_SSI_PARAMS_N 4 #define NGX_HTTP_SSI_ERROR 1 #define NGX_HTTP_SSI_DATE_LEN 2048 #define NGX_HTTP_SSI_ADD_PREFIX 1 typedef struct { ngx_flag_t enable; ngx_flag_t silent_errors; ngx_flag_t ignore_recycled_buffers; ngx_array_t *types; /* array of ngx_str_t */ size_t min_file_chunk; size_t value_len; } ngx_http_ssi_conf_t; typedef struct { ngx_str_t name; ngx_str_t value; } ngx_http_ssi_var_t; typedef struct { ngx_buf_t *buf; u_char *pos; u_char *copy_start; u_char *copy_end; ngx_str_t command; ngx_array_t params; ngx_table_elt_t *param; ngx_table_elt_t params_array[NGX_HTTP_SSI_PARAMS_N]; ngx_chain_t *in; ngx_chain_t *out; ngx_chain_t **last_out; ngx_chain_t *busy; ngx_chain_t *free; ngx_uint_t state; ngx_uint_t saved_state; size_t saved; size_t looked; size_t value_len; ngx_array_t variables; ngx_uint_t output; /* unsigned output:1; */ ngx_str_t timefmt; ngx_str_t errmsg; } ngx_http_ssi_ctx_t; typedef ngx_int_t (*ngx_http_ssi_command_pt) (ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx, ngx_str_t **); typedef struct { ngx_str_t name; ngx_uint_t index; ngx_uint_t mandatory; } ngx_http_ssi_param_t; typedef struct { ngx_str_t name; ngx_http_ssi_command_pt handler; ngx_http_ssi_param_t *params; unsigned conditional:1; unsigned flush:1; } ngx_http_ssi_command_t; typedef enum { ssi_start_state = 0, ssi_tag_state, ssi_comment0_state, ssi_comment1_state, ssi_sharp_state, ssi_precommand_state, ssi_command_state, ssi_preparam_state, ssi_param_state, ssi_preequal_state, ssi_prevalue_state, ssi_double_quoted_value_state, ssi_quoted_value_state, ssi_quoted_symbol_state, ssi_postparam_state, ssi_comment_end0_state, ssi_comment_end1_state, ssi_error_state, ssi_error_end0_state, ssi_error_end1_state } ngx_http_ssi_state_e; static ngx_int_t ngx_http_ssi_output(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx); static ngx_int_t ngx_http_ssi_parse(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx); static ngx_str_t *ngx_http_ssi_get_variable(ngx_http_request_t *r, ngx_str_t *name); static ngx_int_t ngx_http_ssi_evaluate_string(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx, ngx_str_t *text, ngx_uint_t flags); static ngx_int_t ngx_http_ssi_include(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx, ngx_str_t **params); static ngx_int_t ngx_http_ssi_echo(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx, ngx_str_t **params); static ngx_int_t ngx_http_ssi_config(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx, ngx_str_t **params); static ngx_int_t ngx_http_ssi_set(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx, ngx_str_t **params); static ngx_int_t ngx_http_ssi_if(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx, ngx_str_t **params); static ngx_int_t ngx_http_ssi_else(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx, ngx_str_t **params); static ngx_int_t ngx_http_ssi_endif(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx, ngx_str_t **params); static ngx_http_variable_value_t * ngx_http_ssi_date_gmt_local_variable(ngx_http_request_t *r, uintptr_t gmt); static char *ngx_http_ssi_types(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static ngx_int_t ngx_http_ssi_add_variables(ngx_conf_t *cf); static void *ngx_http_ssi_create_conf(ngx_conf_t *cf); static char *ngx_http_ssi_merge_conf(ngx_conf_t *cf, void *parent, void *child); static ngx_int_t ngx_http_ssi_filter_init(ngx_cycle_t *cycle); static ngx_command_t ngx_http_ssi_filter_commands[] = { { ngx_string("ssi"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, ngx_conf_set_flag_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_ssi_conf_t, enable), NULL }, { ngx_string("ssi_silent_errors"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, ngx_conf_set_flag_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_ssi_conf_t, silent_errors), NULL }, { ngx_string("ssi_ignore_recycled_buffers"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, ngx_conf_set_flag_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_ssi_conf_t, ignore_recycled_buffers), NULL }, { ngx_string("ssi_min_file_chunk"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, ngx_conf_set_size_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_ssi_conf_t, min_file_chunk), NULL }, { ngx_string("ssi_types"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE, ngx_http_ssi_types, NGX_HTTP_LOC_CONF_OFFSET, 0, NULL }, ngx_null_command }; static ngx_http_module_t ngx_http_ssi_filter_module_ctx = { ngx_http_ssi_add_variables, /* preconfiguration */ NULL, /* postconfiguration */ NULL, /* create main configuration */ NULL, /* init main configuration */ NULL, /* create server configuration */ NULL, /* merge server configuration */ ngx_http_ssi_create_conf, /* create location configuration */ ngx_http_ssi_merge_conf /* merge location configuration */ }; ngx_module_t ngx_http_ssi_filter_module = { NGX_MODULE_V1, &ngx_http_ssi_filter_module_ctx, /* module context */ ngx_http_ssi_filter_commands, /* module directives */ NGX_HTTP_MODULE, /* module type */ NULL, /* init master */ ngx_http_ssi_filter_init, /* 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_next_header_filter) (ngx_http_request_t *r); static ngx_int_t (*ngx_http_next_body_filter) (ngx_http_request_t *r, ngx_chain_t *in); static u_char ngx_http_ssi_string[] = "<!--"; static ngx_str_t ngx_http_ssi_none = ngx_string("(none)"); #define NGX_HTTP_SSI_INCLUDE_VIRTUAL 0 #define NGX_HTTP_SSI_INCLUDE_FILE 1 #define NGX_HTTP_SSI_ECHO_VAR 0 #define NGX_HTTP_SSI_ECHO_DEFAULT 1 #define NGX_HTTP_SSI_CONFIG_ERRMSG 0 #define NGX_HTTP_SSI_CONFIG_TIMEFMT 1 #define NGX_HTTP_SSI_SET_VAR 0 #define NGX_HTTP_SSI_SET_VALUE 1 #define NGX_HTTP_SSI_IF_EXPR 0 static ngx_http_ssi_param_t ngx_http_ssi_include_params[] = { { ngx_string("virtual"), NGX_HTTP_SSI_INCLUDE_VIRTUAL, 0 }, { ngx_string("file"), NGX_HTTP_SSI_INCLUDE_FILE, 0 }, { ngx_null_string, 0, 0 } }; static ngx_http_ssi_param_t ngx_http_ssi_echo_params[] = { { ngx_string("var"), NGX_HTTP_SSI_ECHO_VAR, 1 }, { ngx_string("default"), NGX_HTTP_SSI_ECHO_DEFAULT, 0 }, { ngx_null_string, 0, 0 } }; static ngx_http_ssi_param_t ngx_http_ssi_config_params[] = { { ngx_string("errmsg"), NGX_HTTP_SSI_CONFIG_ERRMSG, 0 }, { ngx_string("timefmt"), NGX_HTTP_SSI_CONFIG_TIMEFMT, 0 }, { ngx_null_string, 0, 0 } }; static ngx_http_ssi_param_t ngx_http_ssi_set_params[] = { { ngx_string("var"), NGX_HTTP_SSI_SET_VAR, 1 }, { ngx_string("value"), NGX_HTTP_SSI_SET_VALUE, 1 }, { ngx_null_string, 0, 0 } }; static ngx_http_ssi_param_t ngx_http_ssi_if_params[] = { { ngx_string("expr"), NGX_HTTP_SSI_IF_EXPR, 1 }, { ngx_null_string, 0, 0 } }; static ngx_http_ssi_param_t ngx_http_ssi_no_params[] = { { ngx_null_string, 0, 0 } }; static ngx_http_ssi_command_t ngx_http_ssi_commands[] = { { ngx_string("include"), ngx_http_ssi_include, ngx_http_ssi_include_params, 0, 1 }, { ngx_string("echo"), ngx_http_ssi_echo, ngx_http_ssi_echo_params, 0, 0 }, { ngx_string("config"), ngx_http_ssi_config, ngx_http_ssi_config_params, 0, 0 }, { ngx_string("set"), ngx_http_ssi_set, ngx_http_ssi_set_params, 0, 0 }, { ngx_string("if"), ngx_http_ssi_if, ngx_http_ssi_if_params, 0, 0 }, { ngx_string("else"), ngx_http_ssi_else, ngx_http_ssi_no_params, 1, 0 }, { ngx_string("endif"), ngx_http_ssi_endif, ngx_http_ssi_no_params, 1, 0 }, { ngx_null_string, NULL, NULL, 0, 0 } }; static ngx_http_variable_t ngx_http_ssi_vars[] = { { ngx_string("date_local"), ngx_http_ssi_date_gmt_local_variable, 0, NGX_HTTP_VAR_NOCACHABLE, 0 }, { ngx_string("date_gmt"), ngx_http_ssi_date_gmt_local_variable, 1, NGX_HTTP_VAR_NOCACHABLE, 0 }, { ngx_null_string, NULL, 0, 0, 0 } }; static ngx_int_t ngx_http_ssi_header_filter(ngx_http_request_t *r) { ngx_uint_t i; ngx_str_t *type; ngx_http_ssi_ctx_t *ctx; ngx_http_ssi_conf_t *conf; conf = ngx_http_get_module_loc_conf(r, ngx_http_ssi_filter_module); if (!conf->enable || r->headers_out.content_type.len == 0) { return ngx_http_next_header_filter(r); } type = conf->types->elts; for (i = 0; i < conf->types->nelts; i++) { if (r->headers_out.content_type.len >= type[i].len && ngx_strncasecmp(r->headers_out.content_type.data, type[i].data, type[i].len) == 0) { goto found; } } return ngx_http_next_header_filter(r); found: ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_ssi_ctx_t)); if (ctx == NULL) { return NGX_ERROR; } ngx_http_set_ctx(r, ctx, ngx_http_ssi_filter_module); ctx->value_len = conf->value_len; ctx->last_out = &ctx->out; ctx->output = 1; ctx->params.elts = ctx->params_array; ctx->params.size = sizeof(ngx_table_elt_t); ctx->params.nalloc = NGX_HTTP_SSI_PARAMS_N; ctx->params.pool = r->pool; ctx->timefmt.len = sizeof("%A, %d-%b-%Y %H:%M:%S %Z") - 1; ctx->timefmt.data = (u_char *) "%A, %d-%b-%Y %H:%M:%S %Z"; ctx->errmsg.len = sizeof("[an error occurred while processing the directive]") - 1; ctx->errmsg.data = (u_char *) "[an error occurred while processing the directive]"; r->filter_need_in_memory = 1; if (r->main == r) { r->headers_out.content_length_n = -1; if (r->headers_out.content_length) { r->headers_out.content_length->hash = 0; r->headers_out.content_length = NULL; } r->headers_out.last_modified_time = -1; if (r->headers_out.last_modified) { r->headers_out.last_modified->hash = 0; r->headers_out.last_modified = NULL; } } return ngx_http_next_header_filter(r); } static ngx_int_t ngx_http_ssi_body_filter(ngx_http_request_t *r, ngx_chain_t *in) { ngx_int_t rc; ngx_uint_t i; ngx_buf_t *b; ngx_chain_t *cl; ngx_table_elt_t *param; ngx_http_ssi_ctx_t *ctx; ngx_http_ssi_conf_t *conf; ngx_http_ssi_param_t *prm; ngx_http_ssi_command_t *cmd; ngx_str_t *params[NGX_HTTP_SSI_MAX_PARAMS]; ctx = ngx_http_get_module_ctx(r, ngx_http_ssi_filter_module); if (ctx == NULL || (in == NULL && ctx->in == NULL && ctx->busy == NULL)) { return ngx_http_next_body_filter(r, in); } /* add the incoming chain to the chain ctx->in */ if (in) { if (ngx_chain_add_copy(r->pool, &ctx->in, in) == NGX_ERROR) { return NGX_ERROR; } } conf = ngx_http_get_module_loc_conf(r, ngx_http_ssi_filter_module); ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "http ssi filter \"%V\"", &r->uri); while (ctx->in || ctx->buf) { if (ctx->buf == NULL ){ ctx->buf = ctx->in->buf; ctx->in = ctx->in->next; ctx->pos = ctx->buf->pos; } if (ctx->state == ssi_start_state) { ctx->copy_start = ctx->pos; ctx->copy_end = ctx->pos; } b = NULL; while (ctx->pos < ctx->buf->last) { ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "saved: %d state: %d", ctx->saved, ctx->state); rc = ngx_http_ssi_parse(r, ctx); ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "parse: %d, looked: %d %p-%p", rc, ctx->looked, ctx->copy_start, ctx->copy_end); if (rc == NGX_ERROR) { return rc; } if (ctx->copy_start != ctx->copy_end) { if (ctx->output) { ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "saved: %d", ctx->saved); if (ctx->saved) { if (ctx->free) { cl = ctx->free; ctx->free = ctx->free->next; b = cl->buf; ngx_memzero(b, sizeof(ngx_buf_t)); } else { b = ngx_calloc_buf(r->pool); if (b == NULL) { return NGX_ERROR; } cl = ngx_alloc_chain_link(r->pool); if (cl == NULL) { return NGX_ERROR; } cl->buf = b; } b->memory = 1; b->pos = ngx_http_ssi_string; b->last = ngx_http_ssi_string + ctx->saved; *ctx->last_out = cl; ctx->last_out = &cl->next; ctx->saved = 0; } if (ctx->free) { cl = ctx->free; ctx->free = ctx->free->next; b = cl->buf; } else { b = ngx_alloc_buf(r->pool); if (b == NULL) { return NGX_ERROR; } cl = ngx_alloc_chain_link(r->pool); if (cl == NULL) { return NGX_ERROR; } cl->buf = b; } ngx_memcpy(b, ctx->buf, sizeof(ngx_buf_t)); b->pos = ctx->copy_start; b->last = ctx->copy_end; b->shadow = NULL; b->last_buf = 0; b->recycled = 0; if (b->in_file) { if (conf->min_file_chunk < (size_t) (b->last - b->pos)) { b->file_last = b->file_pos + (b->last - b->start); b->file_pos += b->pos - b->start; } else { b->in_file = 0; } } cl->next = NULL; *ctx->last_out = cl; ctx->last_out = &cl->next; } else { ctx->saved = 0; } } if (ctx->state == ssi_start_state) { ctx->copy_start = ctx->pos; ctx->copy_end = ctx->pos; } else { ctx->copy_start = NULL; ctx->copy_end = NULL; } if (rc == NGX_AGAIN) { continue; } if (rc == NGX_OK) { for (cmd = ngx_http_ssi_commands; cmd->handler; cmd++) { if (cmd->name.len == 0) { cmd = (ngx_http_ssi_command_t *) cmd->handler; } if (cmd->name.len != ctx->command.len || ngx_strncmp(cmd->name.data, ctx->command.data, ctx->command.len) != 0) { continue; } break; } if (cmd->name.len == 0 && ctx->output) { ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "invalid SSI command: \"%V\"", &ctx->command); goto ssi_error; } if (!ctx->output && !cmd->conditional) { continue; } ngx_memzero(params, NGX_HTTP_SSI_MAX_PARAMS * sizeof(ngx_str_t *)); param = ctx->params.elts; for (i = 0; i < ctx->params.nelts; i++) { for (prm = cmd->params; prm->name.len; prm++) { if (param[i].key.len != prm->name.len || ngx_strncmp(param[i].key.data, prm->name.data, prm->name.len) != 0) { continue; } if (params[prm->index]) { ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "duplicate \"%V\" parameter " "in \"%V\" SSI command", ¶m[i].key, &ctx->command); goto ssi_error; } params[prm->index] = ¶m[i].value; break; } if (prm->name.len == 0) { ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "invalid parameter name: \"%V\" " "in \"%V\" SSI command", ¶m[i].key, &ctx->command); goto ssi_error; } } for (prm = cmd->params; prm->name.len; prm++) { if (prm->mandatory && params[prm->index] == 0) { ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "mandatory \"%V\" parameter is absent " "in \"%V\" SSI command", &prm->name, &ctx->command); goto ssi_error; } } if (cmd->flush && ctx->out) { rc = ngx_http_ssi_output(r, ctx); if (rc == NGX_ERROR) { return NGX_ERROR; } } if (cmd->handler(r, ctx, params) == NGX_OK) { continue; } } /* rc == NGX_HTTP_SSI_ERROR */ ssi_error: if (conf->silent_errors) { continue; } if (ctx->free) { cl = ctx->free; ctx->free = ctx->free->next; b = cl->buf; ngx_memzero(b, sizeof(ngx_buf_t)); } else { b = ngx_calloc_buf(r->pool); if (b == NULL) { return NGX_ERROR; } cl = ngx_alloc_chain_link(r->pool); if (cl == NULL) { return NGX_ERROR; } cl->buf = b; } b->memory = 1; b->pos = ctx->errmsg.data; b->last = ctx->errmsg.data + ctx->errmsg.len; cl->next = NULL; *ctx->last_out = cl; ctx->last_out = &cl->next; continue; } if (ctx->buf->last_buf || ctx->buf->recycled) { if (b == NULL) { if (ctx->free) { cl = ctx->free; ctx->free = ctx->free->next; b = cl->buf; ngx_memzero(b, sizeof(ngx_buf_t)); } else { b = ngx_calloc_buf(r->pool); if (b == NULL) { return NGX_ERROR; } cl = ngx_alloc_chain_link(r->pool); if (cl == NULL) { return NGX_ERROR; } cl->buf = b; } b->sync = 1; cl->next = NULL; *ctx->last_out = cl; ctx->last_out = &cl->next; } b->last_buf = ctx->buf->last_buf; b->shadow = ctx->buf; if (conf->ignore_recycled_buffers == 0) { b->recycled = ctx->buf->recycled; } } ctx->buf = NULL; ctx->saved = ctx->looked; } if (ctx->out == NULL && ctx->busy == NULL) { return NGX_OK; } return ngx_http_ssi_output(r, ctx); } static ngx_int_t ngx_http_ssi_output(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx) { ngx_int_t rc; ngx_buf_t *b; ngx_chain_t *cl; rc = ngx_http_next_body_filter(r, ctx->out); if (ctx->busy == NULL) { ctx->busy = ctx->out; } else { for (cl = ctx->busy; cl->next; cl = cl->next) { /* void */ } cl->next = ctx->out; } ctx->out = NULL; ctx->last_out = &ctx->out; while (ctx->busy) { b = ctx->busy->buf; if (ngx_buf_size(b) != 0) { break; } #if (NGX_HAVE_WRITE_ZEROCOPY) if (b->zerocopy_busy) { break; } #endif if (b->shadow) { b->shadow->pos = b->shadow->last; } cl = ctx->busy; ctx->busy = cl->next; cl->next = ctx->free; ctx->free = cl; } return rc; } static ngx_int_t ngx_http_ssi_parse(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx) { u_char *p, *last, *copy_end, ch; size_t looked; ngx_http_ssi_state_e state; state = ctx->state; looked = ctx->looked; last = ctx->buf->last; copy_end = ctx->copy_end; for (p = ctx->pos; p < last; p++) { ch = *p; if (state == ssi_start_state) { /* the tight loop */ for ( ;; ) { if (ch == '<') { copy_end = p; looked = 1; state = ssi_tag_state; goto tag_started; } if (++p == last) { break; } ch = *p; } ctx->pos = p; ctx->looked = looked; ctx->copy_end = p; if (ctx->copy_start == NULL) { ctx->copy_start = ctx->buf->pos; } return NGX_AGAIN; tag_started: continue; } switch (state) { case ssi_start_state: break; case ssi_tag_state: switch (ch) { case '!': looked = 2; state = ssi_comment0_state; break; case '<': copy_end = p; break; default: copy_end = p; looked = 0; state = ssi_start_state; break; } break; case ssi_comment0_state: switch (ch) { case '-': looked = 3; state = ssi_comment1_state; break; case '<': copy_end = p; looked = 1; state = ssi_tag_state; break; default: copy_end = p; looked = 0; state = ssi_start_state; break; } break; case ssi_comment1_state: switch (ch) { case '-': looked = 4; state = ssi_sharp_state; break; case '<': copy_end = p; looked = 1; state = ssi_tag_state; break; default: copy_end = p; looked = 0; state = ssi_start_state; break; } break; case ssi_sharp_state: switch (ch) { case '#': if (ctx->copy_start) { ctx->saved = 0; } looked = 0; state = ssi_precommand_state; break; case '<': copy_end = p; looked = 1; state = ssi_tag_state; break; default: copy_end = p; looked = 0; state = ssi_start_state; break; } break; case ssi_precommand_state: switch (ch) { case ' ': case CR: case LF: case '\t': break; default: ctx->command.len = 1; ctx->command.data = ngx_palloc(r->pool, NGX_HTTP_SSI_COMMAND_LEN + 1); if (ctx->command.data == NULL) { return NGX_ERROR; } ctx->command.data[0] = ch; ctx->params.nelts = 0; state = ssi_command_state; break; } break; case ssi_command_state: switch (ch) { case ' ': case CR: case LF: case '\t': state = ssi_preparam_state; break; case '-': state = ssi_comment_end0_state; break; default: ctx->command.data[ctx->command.len++] = ch; if (ctx->command.len == NGX_HTTP_SSI_COMMAND_LEN) { ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "the \"%V\" SSI command is too long", &ctx->command); state = ssi_error_state; break; } } break; case ssi_preparam_state: switch (ch) { case ' ': case CR: case LF: case '\t': break; case '-': state = ssi_comment_end0_state; break; default: ctx->param = ngx_array_push(&ctx->params); if (ctx->param == NULL) { return NGX_ERROR; } ctx->param->key.len = 1; ctx->param->key.data = ngx_palloc(r->pool, NGX_HTTP_SSI_PARAM_LEN + 1); if (ctx->param->key.data == NULL) { return NGX_ERROR; } ctx->param->key.data[0] = ch; ctx->param->value.len = 0; ctx->param->value.data = ngx_palloc(r->pool, ctx->value_len + 1); if (ctx->param->value.data == NULL) { return NGX_ERROR; } state = ssi_param_state; break; } break; case ssi_param_state: switch (ch) { case ' ': case CR: case LF: case '\t': state = ssi_preequal_state; break; case '=': state = ssi_prevalue_state; break; case '-': state = ssi_error_end0_state; ctx->param->key.data[ctx->param->key.len++] = ch; ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "invalid \"%V\" parameter in \"%V\" SSI command", &ctx->param->key, &ctx->command); break; default: ctx->param->key.data[ctx->param->key.len++] = ch; if (ctx->param->key.len == NGX_HTTP_SSI_PARAM_LEN) { state = ssi_error_state; ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "too long \"%V\" parameter in " "\"%V\" SSI command", &ctx->param->key, &ctx->command); break; } } break; case ssi_preequal_state: switch (ch) { case ' ': case CR: case LF: case '\t': break; case '=': state = ssi_prevalue_state; break; default: if (ch == '-') { state = ssi_error_end0_state; } else { state = ssi_error_state; } ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "unexpected \"%c\" symbol after \"%V\" " "parameter in \"%V\" SSI command", ch, &ctx->param->key, &ctx->command); break; } break; case ssi_prevalue_state: switch (ch) { case ' ': case CR: case LF: case '\t': break; case '"': state = ssi_double_quoted_value_state; break; case '\'': state = ssi_quoted_value_state; break; default: if (ch == '-') { state = ssi_error_end0_state; } else { state = ssi_error_state; } ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "unexpected \"%c\" symbol before value of " "\"%V\" parameter in \"%V\" SSI command", ch, &ctx->param->key, &ctx->command); break; } break; case ssi_double_quoted_value_state: switch (ch) { case '\\': ctx->saved_state = ssi_double_quoted_value_state; state = ssi_quoted_symbol_state; break; case '"': state = ssi_postparam_state; break; default: ctx->param->value.data[ctx->param->value.len++] = ch; if (ctx->param->value.len == ctx->value_len) { ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "too long \"%V\" value of \"%V\" parameter " "in \"%V\" SSI command", &ctx->param->value, &ctx->param->key, &ctx->command); state = ssi_error_state; break; } } break; case ssi_quoted_value_state: switch (ch) { case '\\': ctx->saved_state = ssi_quoted_value_state; state = ssi_quoted_symbol_state; break; case '\'': state = ssi_postparam_state; break; default: ctx->param->value.data[ctx->param->value.len++] = ch; if (ctx->param->value.len == ctx->value_len) { ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "too long \"%V\" value of \"%V\" parameter " "in \"%V\" SSI command", &ctx->param->value, &ctx->param->key, &ctx->command); state = ssi_error_state; break; } } break; case ssi_quoted_symbol_state: ctx->param->value.data[ctx->param->value.len++] = ch; if (ctx->param->value.len == ctx->value_len) { if (ctx->param->value.len == ctx->value_len) { ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "too long \"%V\" value of \"%V\" parameter " "in \"%V\" SSI command", &ctx->param->value, &ctx->param->key, &ctx->command); state = ssi_error_state; break; } } state = ctx->saved_state; break; case ssi_postparam_state: switch (ch) { case ' ': case CR: case LF: case '\t': state = ssi_preparam_state; break; case '-': state = ssi_comment_end0_state; break; default: ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "unexpected \"%c\" symbol after \"%V\" value " "of \"%V\" parameter in \"%V\" SSI command", ch, &ctx->param->value, &ctx->param->key, &ctx->command); state = ssi_error_state; break; } break; case ssi_comment_end0_state: switch (ch) { case '-': state = ssi_comment_end1_state; break; default: ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "unexpected \"%c\" symbol in \"%V\" SSI command", ch, &ctx->command); state = ssi_error_state; break; } break; case ssi_comment_end1_state: switch (ch) { case '>': ctx->state = ssi_start_state; ctx->pos = p + 1; ctx->looked = looked; ctx->copy_end = copy_end; if (ctx->copy_start == NULL && copy_end) { ctx->copy_start = ctx->buf->pos; } return NGX_OK; default: ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "unexpected \"%c\" symbol in \"%V\" SSI command", ch, &ctx->command); state = ssi_error_state; break; } break; case ssi_error_state: switch (ch) { case '-': state = ssi_error_end0_state; break; default: break; } break; case ssi_error_end0_state: switch (ch) { case '-': state = ssi_error_end1_state; break; default: state = ssi_error_state; break; } break; case ssi_error_end1_state: switch (ch) { case '>': ctx->state = ssi_start_state; ctx->pos = p + 1; ctx->looked = looked; ctx->copy_end = copy_end; if (ctx->copy_start == NULL && copy_end) { ctx->copy_start = ctx->buf->pos; } return NGX_HTTP_SSI_ERROR; default: state = ssi_error_state; break; } break; } } ctx->state = state; ctx->pos = p; ctx->looked = looked; ctx->copy_end = (state == ssi_start_state) ? p : copy_end; if (ctx->copy_start == NULL && ctx->copy_end) { ctx->copy_start = ctx->buf->pos; } return NGX_AGAIN; } static ngx_str_t * ngx_http_ssi_get_variable(ngx_http_request_t *r, ngx_str_t *name) { ngx_uint_t i; ngx_http_ssi_var_t *var; ngx_http_ssi_ctx_t *ctx; ctx = ngx_http_get_module_ctx(r->main, ngx_http_ssi_filter_module); var = ctx->variables.elts; for (i = 0; i < ctx->variables.nelts; i++) { if (name->len != var[i].name.len) { continue; } if (ngx_strncasecmp(name->data, var[i].name.data, name->len) == 0) { return &var[i].value; } } return NULL; } static ngx_int_t ngx_http_ssi_evaluate_string(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx, ngx_str_t *text, ngx_uint_t flags) { u_char ch, *p, **value, *data; size_t *size, len, prefix; ngx_str_t var, part, *val; ngx_uint_t i, j, n, bracket; ngx_array_t lengths, values; ngx_http_variable_value_t *vv; n = ngx_http_script_variables_count(text); if (n == 0) { if (!(flags & NGX_HTTP_SSI_ADD_PREFIX)) { return NGX_OK; } if (text->data[0] != '/') { for (prefix = r->uri.len; prefix; prefix--) { if (r->uri.data[prefix - 1] == '/') { break; } } if (prefix) { len = prefix + text->len; data = ngx_palloc(r->pool, len); if (data == NULL) { return NGX_ERROR; } p = ngx_cpymem(data, r->uri.data, prefix); ngx_memcpy(p, text->data, text->len); text->len = len; text->data = data; } } return NGX_OK; } if (ngx_array_init(&lengths, r->pool, 8, sizeof(size_t *)) != NGX_OK) { return NGX_ERROR; } if (ngx_array_init(&values, r->pool, 8, sizeof(u_char *)) != NGX_OK) { return NGX_ERROR; } len = 0; i = 0; while (i < text->len) { if (text->data[i] == '$') { var.len = 0; if (++i == text->len) { goto invalid_variable; } if (text->data[i] == '{') { bracket = 1; if (++i == text->len) { goto invalid_variable; } var.data = &text->data[i]; } else { bracket = 0; var.data = &text->data[i]; } for ( /* void */ ; i < text->len; i++, var.len++) { ch = text->data[i]; if (ch == '}' && bracket) { i++; bracket = 0; break; } if ((ch >= 'A' && ch <= 'Z') || (ch >= 'a' && ch <= 'z') || (ch >= '0' && ch <= '9') || ch == '_') { continue; } break; } if (bracket) { ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "the closing bracket in \"%V\" " "variable is missing", &var); return NGX_ERROR; } if (var.len == 0) { goto invalid_variable; } for (j = 0; j < var.len; j++) { var.data[j] = ngx_tolower(var.data[j]); } val = ngx_http_ssi_get_variable(r, &var); if (val == NULL) { vv = ngx_http_get_variable(r, &var); if (vv == NULL) { return NGX_ERROR; } if (vv == NGX_HTTP_VAR_NOT_FOUND) { continue; } part = vv->text; } else { part = *val; } } else { part.len = 0; part.data = &text->data[i]; while (i < text->len && text->data[i] != '$') { i++; part.len++; } } len += part.len; size = ngx_array_push(&lengths); if (size == NULL) { return NGX_ERROR; } *size = part.len; value = ngx_array_push(&values); if (value == NULL) { return NGX_ERROR; } *value = part.data; } prefix = 0; size = lengths.elts; value = values.elts; if (flags & NGX_HTTP_SSI_ADD_PREFIX) { for (i = 0; i < values.nelts; i++) { if (size[i] != 0) { if (*value[i] != '/') { for (prefix = r->uri.len; prefix; prefix--) { if (r->uri.data[prefix - 1] == '/') { len += prefix; break; } } } break; } } } p = ngx_palloc(r->pool, len); if (p == NULL) { return NGX_ERROR; } text->len = len; text->data = p; if (prefix) { p = ngx_cpymem(p, r->uri.data, prefix); } for (i = 0; i < values.nelts; i++) { p = ngx_cpymem(p, value[i], size[i]); } return NGX_OK; invalid_variable: ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "invalid variable name in \"%V\"", text); return NGX_ERROR; } static ngx_int_t ngx_http_ssi_include(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx, ngx_str_t **params) { ngx_str_t *uri, *file, args; ngx_uint_t i; uri = params[NGX_HTTP_SSI_INCLUDE_VIRTUAL]; file = params[NGX_HTTP_SSI_INCLUDE_FILE]; if (uri && file) { ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "inlcusion may be either virtual=\"%V\" or file=\"%V\"", uri, file); return NGX_HTTP_SSI_ERROR; } if (uri == NULL && file == NULL) { ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "no parameter in \"include\" SSI command"); return NGX_HTTP_SSI_ERROR; } if (uri == NULL) { uri = file; } if (ngx_http_ssi_evaluate_string(r, ctx, uri, NGX_HTTP_SSI_ADD_PREFIX) != NGX_OK) { return NGX_HTTP_SSI_ERROR; } args.len = 0; args.data = NULL; if (params[NGX_HTTP_SSI_INCLUDE_VIRTUAL]) { for (i = 0; i < uri->len; i++) { if (uri->data[i] == '?') { args.len = uri->len - i - 1; args.data = &uri->data[i + 1]; uri->len -= args.len + 1; break; } } } if (ngx_http_subrequest(r, uri, &args) != NGX_OK) { return NGX_HTTP_SSI_ERROR; } return NGX_OK; } static ngx_int_t ngx_http_ssi_echo(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx, ngx_str_t **params) { ngx_uint_t i; ngx_buf_t *b; ngx_str_t *var, *value; ngx_chain_t *cl; ngx_http_variable_value_t *vv; var = params[NGX_HTTP_SSI_ECHO_VAR]; value = ngx_http_ssi_get_variable(r, var); if (value == NULL) { for (i = 0; i < var->len; i++) { var->data[i] = ngx_tolower(var->data[i]); } vv = ngx_http_get_variable(r, var); if (vv == NULL) { return NGX_HTTP_SSI_ERROR; } if (vv != NGX_HTTP_VAR_NOT_FOUND) { value = &vv->text; } } if (value == NULL) { value = params[NGX_HTTP_SSI_ECHO_DEFAULT]; if (value == NULL) { value = &ngx_http_ssi_none; } else if (value->len == 0) { return NGX_OK; } } else { if (value->len == 0) { return NGX_OK; } } b = ngx_calloc_buf(r->pool); if (b == NULL) { return NGX_HTTP_SSI_ERROR; } cl = ngx_alloc_chain_link(r->pool); if (cl == NULL) { return NGX_HTTP_SSI_ERROR; } b->memory = 1; b->pos = value->data; b->last = value->data + value->len; cl->buf = b; cl->next = NULL; *ctx->last_out = cl; ctx->last_out = &cl->next; return NGX_OK; } static ngx_int_t ngx_http_ssi_config(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx, ngx_str_t **params) { ngx_str_t *value; value = params[NGX_HTTP_SSI_CONFIG_TIMEFMT]; if (value) { ctx->timefmt = *value; } value = params[NGX_HTTP_SSI_CONFIG_ERRMSG]; if (value) { ctx->errmsg = *value; } return NGX_OK; } static ngx_int_t ngx_http_ssi_set(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx, ngx_str_t **params) { ngx_str_t *name, *value, *vv; ngx_http_ssi_var_t *var; ngx_http_ssi_ctx_t *mctx; mctx = ngx_http_get_module_ctx(r->main, ngx_http_ssi_filter_module); if (mctx->variables.elts == NULL) { if (ngx_array_init(&mctx->variables, r->pool, 4, sizeof(ngx_http_ssi_var_t)) != NGX_OK) { return NGX_HTTP_SSI_ERROR; } } name = params[NGX_HTTP_SSI_SET_VAR]; value = params[NGX_HTTP_SSI_SET_VALUE]; if (ngx_http_ssi_evaluate_string(r, ctx, value, 0) != NGX_OK) { return NGX_HTTP_SSI_ERROR; } vv = ngx_http_ssi_get_variable(r, name); if (vv) { *vv = *value; return NGX_OK; } var = ngx_array_push(&mctx->variables); if (var == NULL) { return NGX_HTTP_SSI_ERROR; } var->name = *name; var->value = *value; ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "set: \"%V\"=\"%V\"", name, value); return NGX_OK; } static ngx_int_t ngx_http_ssi_if(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx, ngx_str_t **params) { u_char *p, *last; ngx_str_t *expr, left, right; ngx_int_t rc; ngx_uint_t negative, noregex; #if (NGX_PCRE) ngx_str_t err; ngx_regex_t *regex; u_char errstr[NGX_MAX_CONF_ERRSTR]; #endif expr = params[NGX_HTTP_SSI_IF_EXPR]; left.data = expr->data; last = expr->data + expr->len; for (p = left.data; p < last; p++) { if (*p >= 'A' && *p <= 'Z') { *p |= 0x20; continue; } if ((*p >= 'a' && *p <= 'z') || (*p >= '0' && *p <= '9') || *p == '$' || *p == '{' || *p == '}' || *p == '_') { continue; } break; } left.len = p - left.data; while (p < last && *p == ' ') { p++; } ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "left: \"%V\"", &left); if (ngx_http_ssi_evaluate_string(r, ctx, &left, 0) != NGX_OK) { return NGX_HTTP_SSI_ERROR; } ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "evaluted left: \"%V\"", &left); if (p == last) { if (left.len) { ctx->output = 1; } else { ctx->output = 0; } return NGX_OK; } if (p < last && *p == '=') { negative = 0; p++; } else if (p + 1 < last && *p == '!' && *(p + 1) == '=') { negative = 1; p += 2; } else { goto invalid_expression; } while (p < last && *p == ' ') { p++; } if (p < last && *p == '/') { if (*(last - 1) != '/') { goto invalid_expression; } noregex = 0; last--; p++; } else { noregex = 1; } right.len = last - p; right.data = p; ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "right: \"%V\"", &right); if (ngx_http_ssi_evaluate_string(r, ctx, &right, 0) != NGX_OK) { return NGX_HTTP_SSI_ERROR; } ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "evaluted right: \"%V\"", &right); if (noregex) { if (left.len != right.len) { rc = -1; } else { rc = ngx_strncmp(left.data, right.data, right.len); } } else { #if (NGX_PCRE) err.len = NGX_MAX_CONF_ERRSTR; err.data = errstr; right.data[right.len] = '\0'; regex = ngx_regex_compile(&right, 0, r->pool, &err); if (regex == NULL) { ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "%s", err.data); return NGX_HTTP_SSI_ERROR; } rc = ngx_regex_exec(regex, &left, NULL, 0); if (rc != NGX_REGEX_NO_MATCHED && rc < 0) { ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, ngx_regex_exec_n " failed: %d on \"%V\" using \"%V\"", rc, &left, &right); return NGX_HTTP_SSI_ERROR; } #else ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, "the using of the regex \"%V\" in SSI " "requires PCRE library", &right); return NGX_HTTP_SSI_ERROR; #endif } if ((rc == 0 && !negative) || (rc != 0 && negative)) { ctx->output = 1; } else { ctx->output = 0; } return NGX_OK; invalid_expression: ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "invalid expression in \"%V\"", expr); return NGX_HTTP_SSI_ERROR; } static ngx_int_t ngx_http_ssi_else(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx, ngx_str_t **params) { ctx->output = !ctx->output; return NGX_OK; } static ngx_int_t ngx_http_ssi_endif(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx, ngx_str_t **params) { ctx->output = 1; return NGX_OK; } static ngx_http_variable_value_t * ngx_http_ssi_date_gmt_local_variable(ngx_http_request_t *r, uintptr_t gmt) { ngx_http_ssi_ctx_t *ctx; ngx_http_variable_value_t *vv; struct tm tm; char buf[NGX_HTTP_SSI_DATE_LEN]; vv = ngx_palloc(r->pool, sizeof(ngx_http_variable_value_t)); if (vv == NULL) { return NULL; } ctx = ngx_http_get_module_ctx(r, ngx_http_ssi_filter_module); if (ctx->timefmt.len == sizeof("%s") - 1 && ctx->timefmt.data[0] == '%' && ctx->timefmt.data[1] == 's') { vv->value = ngx_time() + (gmt ? 0 : ngx_gmtoff); vv->text.data = ngx_palloc(r->pool, NGX_TIME_T_LEN); if (vv->text.data == NULL) { return NULL; } vv->text.len = ngx_sprintf(vv->text.data, "%T", vv->value) - vv->text.data; return vv; } if (gmt) { ngx_libc_gmtime(&tm); } else { ngx_libc_localtime(&tm); } vv->value = ngx_time() + (gmt ? 0 : ngx_gmtoff); vv->text.len = strftime(buf, NGX_HTTP_SSI_DATE_LEN, (char *) ctx->timefmt.data, &tm); if (vv->text.len == 0) { return NULL; } vv->text.data = ngx_palloc(r->pool, vv->text.len); if (vv->text.data == NULL) { return NULL; } ngx_memcpy(vv->text.data, buf, vv->text.len); return vv; } static char * ngx_http_ssi_types(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_http_ssi_conf_t *scf = conf; ngx_str_t *value, *type; ngx_uint_t i; if (scf->types == NULL) { scf->types = ngx_array_create(cf->pool, 4, sizeof(ngx_str_t)); if (scf->types == NULL) { return NGX_CONF_ERROR; } type = ngx_array_push(scf->types); if (type == NULL) { return NGX_CONF_ERROR; } type->len = sizeof("text/html") - 1; type->data = (u_char *) "text/html"; } value = cf->args->elts; for (i = 1; i < cf->args->nelts; i++) { if (ngx_strcmp(value[i].data, "text/html") == 0) { continue; } type = ngx_array_push(scf->types); if (type == NULL) { return NGX_CONF_ERROR; } type->len = value[i].len; type->data = ngx_palloc(cf->pool, type->len + 1); if (type->data == NULL) { return NGX_CONF_ERROR; } ngx_cpystrn(type->data, value[i].data, type->len + 1); } return NGX_CONF_OK; } static ngx_int_t ngx_http_ssi_add_variables(ngx_conf_t *cf) { ngx_http_variable_t *var, *v; for (v = ngx_http_ssi_vars; v->name.len; v++) { var = ngx_http_add_variable(cf, &v->name, v->flags); if (var == NULL) { return NGX_ERROR; } var->handler = v->handler; var->data = v->data; } return NGX_OK; } static void * ngx_http_ssi_create_conf(ngx_conf_t *cf) { ngx_http_ssi_conf_t *conf; conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_ssi_conf_t)); if (conf == NULL) { return NGX_CONF_ERROR; } /* * set by ngx_pcalloc(): * * conf->types = NULL; */ conf->enable = NGX_CONF_UNSET; conf->silent_errors = NGX_CONF_UNSET; conf->ignore_recycled_buffers = NGX_CONF_UNSET; conf->min_file_chunk = NGX_CONF_UNSET_SIZE; conf->value_len = NGX_CONF_UNSET_SIZE; return conf; } static char * ngx_http_ssi_merge_conf(ngx_conf_t *cf, void *parent, void *child) { ngx_http_ssi_conf_t *prev = parent; ngx_http_ssi_conf_t *conf = child; ngx_str_t *type; ngx_conf_merge_value(conf->enable, prev->enable, 0); ngx_conf_merge_value(conf->silent_errors, prev->silent_errors, 0); ngx_conf_merge_value(conf->ignore_recycled_buffers, prev->ignore_recycled_buffers, 0); ngx_conf_merge_size_value(conf->min_file_chunk, prev->min_file_chunk, 1024); ngx_conf_merge_size_value(conf->value_len, prev->value_len, 256); if (conf->types == NULL) { if (prev->types == NULL) { conf->types = ngx_array_create(cf->pool, 1, sizeof(ngx_str_t)); if (conf->types == NULL) { return NGX_CONF_ERROR; } type = ngx_array_push(conf->types); if (type == NULL) { return NGX_CONF_ERROR; } type->len = sizeof("text/html") - 1; type->data = (u_char *) "text/html"; } else { conf->types = prev->types; } } return NGX_CONF_OK; } static ngx_int_t ngx_http_ssi_filter_init(ngx_cycle_t *cycle) { ngx_http_next_header_filter = ngx_http_top_header_filter; ngx_http_top_header_filter = ngx_http_ssi_header_filter; ngx_http_next_body_filter = ngx_http_top_body_filter; ngx_http_top_body_filter = ngx_http_ssi_body_filter; return NGX_OK; }