diff options
Diffstat (limited to 'app/nginx/src/http/modules/ngx_http_ssi_filter_module.c')
-rw-r--r-- | app/nginx/src/http/modules/ngx_http_ssi_filter_module.c | 2930 |
1 files changed, 2930 insertions, 0 deletions
diff --git a/app/nginx/src/http/modules/ngx_http_ssi_filter_module.c b/app/nginx/src/http/modules/ngx_http_ssi_filter_module.c new file mode 100644 index 0000000..6fb1fbe --- /dev/null +++ b/app/nginx/src/http/modules/ngx_http_ssi_filter_module.c @@ -0,0 +1,2930 @@ + +/* + * Copyright (C) Igor Sysoev + * Copyright (C) Nginx, Inc. + */ + + +#include <ngx_config.h> +#include <ngx_core.h> +#include <ngx_http.h> + +#define NGX_HTTP_SSI_ERROR 1 + +#define NGX_HTTP_SSI_DATE_LEN 2048 + +#define NGX_HTTP_SSI_ADD_PREFIX 1 +#define NGX_HTTP_SSI_ADD_ZERO 2 + + +typedef struct { + ngx_flag_t enable; + ngx_flag_t silent_errors; + ngx_flag_t ignore_recycled_buffers; + ngx_flag_t last_modified; + + ngx_hash_t types; + + size_t min_file_chunk; + size_t value_len; + + ngx_array_t *types_keys; +} ngx_http_ssi_loc_conf_t; + + +typedef struct { + ngx_str_t name; + ngx_uint_t key; + ngx_str_t value; +} ngx_http_ssi_var_t; + + +typedef struct { + ngx_str_t name; + ngx_chain_t *bufs; + ngx_uint_t count; +} ngx_http_ssi_block_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 void ngx_http_ssi_buffered(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, ngx_uint_t key); +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_regex_match(ngx_http_request_t *r, + ngx_str_t *pattern, ngx_str_t *str); + +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_stub_output(ngx_http_request_t *r, void *data, + ngx_int_t rc); +static ngx_int_t ngx_http_ssi_set_variable(ngx_http_request_t *r, void *data, + ngx_int_t rc); +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_int_t ngx_http_ssi_block(ngx_http_request_t *r, + ngx_http_ssi_ctx_t *ctx, ngx_str_t **params); +static ngx_int_t ngx_http_ssi_endblock(ngx_http_request_t *r, + ngx_http_ssi_ctx_t *ctx, ngx_str_t **params); + +static ngx_int_t ngx_http_ssi_date_gmt_local_variable(ngx_http_request_t *r, + ngx_http_variable_value_t *v, uintptr_t gmt); + +static ngx_int_t ngx_http_ssi_preconfiguration(ngx_conf_t *cf); +static void *ngx_http_ssi_create_main_conf(ngx_conf_t *cf); +static char *ngx_http_ssi_init_main_conf(ngx_conf_t *cf, void *conf); +static void *ngx_http_ssi_create_loc_conf(ngx_conf_t *cf); +static char *ngx_http_ssi_merge_loc_conf(ngx_conf_t *cf, + void *parent, void *child); +static ngx_int_t ngx_http_ssi_filter_init(ngx_conf_t *cf); + + +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_HTTP_LIF_CONF + |NGX_CONF_FLAG, + ngx_conf_set_flag_slot, + NGX_HTTP_LOC_CONF_OFFSET, + offsetof(ngx_http_ssi_loc_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_loc_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_loc_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_TAKE1, + ngx_conf_set_size_slot, + NGX_HTTP_LOC_CONF_OFFSET, + offsetof(ngx_http_ssi_loc_conf_t, min_file_chunk), + NULL }, + + { ngx_string("ssi_value_length"), + NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, + ngx_conf_set_size_slot, + NGX_HTTP_LOC_CONF_OFFSET, + offsetof(ngx_http_ssi_loc_conf_t, value_len), + NULL }, + + { ngx_string("ssi_types"), + NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE, + ngx_http_types_slot, + NGX_HTTP_LOC_CONF_OFFSET, + offsetof(ngx_http_ssi_loc_conf_t, types_keys), + &ngx_http_html_default_types[0] }, + + { ngx_string("ssi_last_modified"), + 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_loc_conf_t, last_modified), + NULL }, + + ngx_null_command +}; + + + +static ngx_http_module_t ngx_http_ssi_filter_module_ctx = { + ngx_http_ssi_preconfiguration, /* preconfiguration */ + ngx_http_ssi_filter_init, /* postconfiguration */ + + ngx_http_ssi_create_main_conf, /* create main configuration */ + ngx_http_ssi_init_main_conf, /* init main configuration */ + + NULL, /* create server configuration */ + NULL, /* merge server configuration */ + + ngx_http_ssi_create_loc_conf, /* create location configuration */ + ngx_http_ssi_merge_loc_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 */ + NULL, /* init module */ + NULL, /* init process */ + NULL, /* init thread */ + NULL, /* exit thread */ + NULL, /* exit process */ + NULL, /* exit master */ + NGX_MODULE_V1_PADDING +}; + + +static ngx_http_output_header_filter_pt ngx_http_next_header_filter; +static ngx_http_output_body_filter_pt ngx_http_next_body_filter; + + +static u_char ngx_http_ssi_string[] = "<!--"; + +static ngx_str_t ngx_http_ssi_none = ngx_string("(none)"); +static ngx_str_t ngx_http_ssi_timefmt = ngx_string("%A, %d-%b-%Y %H:%M:%S %Z"); +static ngx_str_t ngx_http_ssi_null_string = ngx_null_string; + + +#define NGX_HTTP_SSI_INCLUDE_VIRTUAL 0 +#define NGX_HTTP_SSI_INCLUDE_FILE 1 +#define NGX_HTTP_SSI_INCLUDE_WAIT 2 +#define NGX_HTTP_SSI_INCLUDE_SET 3 +#define NGX_HTTP_SSI_INCLUDE_STUB 4 + +#define NGX_HTTP_SSI_ECHO_VAR 0 +#define NGX_HTTP_SSI_ECHO_DEFAULT 1 +#define NGX_HTTP_SSI_ECHO_ENCODING 2 + +#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 + +#define NGX_HTTP_SSI_BLOCK_NAME 0 + + +static ngx_http_ssi_param_t ngx_http_ssi_include_params[] = { + { ngx_string("virtual"), NGX_HTTP_SSI_INCLUDE_VIRTUAL, 0, 0 }, + { ngx_string("file"), NGX_HTTP_SSI_INCLUDE_FILE, 0, 0 }, + { ngx_string("wait"), NGX_HTTP_SSI_INCLUDE_WAIT, 0, 0 }, + { ngx_string("set"), NGX_HTTP_SSI_INCLUDE_SET, 0, 0 }, + { ngx_string("stub"), NGX_HTTP_SSI_INCLUDE_STUB, 0, 0 }, + { ngx_null_string, 0, 0, 0 } +}; + + +static ngx_http_ssi_param_t ngx_http_ssi_echo_params[] = { + { ngx_string("var"), NGX_HTTP_SSI_ECHO_VAR, 1, 0 }, + { ngx_string("default"), NGX_HTTP_SSI_ECHO_DEFAULT, 0, 0 }, + { ngx_string("encoding"), NGX_HTTP_SSI_ECHO_ENCODING, 0, 0 }, + { ngx_null_string, 0, 0, 0 } +}; + + +static ngx_http_ssi_param_t ngx_http_ssi_config_params[] = { + { ngx_string("errmsg"), NGX_HTTP_SSI_CONFIG_ERRMSG, 0, 0 }, + { ngx_string("timefmt"), NGX_HTTP_SSI_CONFIG_TIMEFMT, 0, 0 }, + { ngx_null_string, 0, 0, 0 } +}; + + +static ngx_http_ssi_param_t ngx_http_ssi_set_params[] = { + { ngx_string("var"), NGX_HTTP_SSI_SET_VAR, 1, 0 }, + { ngx_string("value"), NGX_HTTP_SSI_SET_VALUE, 1, 0 }, + { ngx_null_string, 0, 0, 0 } +}; + + +static ngx_http_ssi_param_t ngx_http_ssi_if_params[] = { + { ngx_string("expr"), NGX_HTTP_SSI_IF_EXPR, 1, 0 }, + { ngx_null_string, 0, 0, 0 } +}; + + +static ngx_http_ssi_param_t ngx_http_ssi_block_params[] = { + { ngx_string("name"), NGX_HTTP_SSI_BLOCK_NAME, 1, 0 }, + { ngx_null_string, 0, 0, 0 } +}; + + +static ngx_http_ssi_param_t ngx_http_ssi_no_params[] = { + { ngx_null_string, 0, 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, 0, 1 }, + { ngx_string("echo"), ngx_http_ssi_echo, + ngx_http_ssi_echo_params, 0, 0, 0 }, + { ngx_string("config"), ngx_http_ssi_config, + ngx_http_ssi_config_params, 0, 0, 0 }, + { ngx_string("set"), ngx_http_ssi_set, ngx_http_ssi_set_params, 0, 0, 0 }, + + { ngx_string("if"), ngx_http_ssi_if, ngx_http_ssi_if_params, 0, 0, 0 }, + { ngx_string("elif"), ngx_http_ssi_if, ngx_http_ssi_if_params, + NGX_HTTP_SSI_COND_IF, 0, 0 }, + { ngx_string("else"), ngx_http_ssi_else, ngx_http_ssi_no_params, + NGX_HTTP_SSI_COND_IF, 0, 0 }, + { ngx_string("endif"), ngx_http_ssi_endif, ngx_http_ssi_no_params, + NGX_HTTP_SSI_COND_ELSE, 0, 0 }, + + { ngx_string("block"), ngx_http_ssi_block, + ngx_http_ssi_block_params, 0, 0, 0 }, + { ngx_string("endblock"), ngx_http_ssi_endblock, + ngx_http_ssi_no_params, 0, 1, 0 }, + + { ngx_null_string, NULL, NULL, 0, 0, 0 } +}; + + +static ngx_http_variable_t ngx_http_ssi_vars[] = { + + { ngx_string("date_local"), NULL, ngx_http_ssi_date_gmt_local_variable, 0, + NGX_HTTP_VAR_NOCACHEABLE, 0 }, + + { ngx_string("date_gmt"), NULL, ngx_http_ssi_date_gmt_local_variable, 1, + NGX_HTTP_VAR_NOCACHEABLE, 0 }, + + { ngx_null_string, NULL, NULL, 0, 0, 0 } +}; + + + +static ngx_int_t +ngx_http_ssi_header_filter(ngx_http_request_t *r) +{ + ngx_http_ssi_ctx_t *ctx; + ngx_http_ssi_loc_conf_t *slcf; + + slcf = ngx_http_get_module_loc_conf(r, ngx_http_ssi_filter_module); + + if (!slcf->enable + || r->headers_out.content_length_n == 0 + || ngx_http_test_content_type(r, &slcf->types) == NULL) + { + return ngx_http_next_header_filter(r); + } + + 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 = slcf->value_len; + ctx->last_out = &ctx->out; + + ctx->encoding = NGX_HTTP_SSI_ENTITY_ENCODING; + 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 = ngx_http_ssi_timefmt; + ngx_str_set(&ctx->errmsg, + "[an error occurred while processing the directive]"); + + r->filter_need_in_memory = 1; + + if (r == r->main) { + ngx_http_clear_content_length(r); + ngx_http_clear_accept_ranges(r); + + if (!slcf->last_modified) { + ngx_http_clear_last_modified(r); + ngx_http_clear_etag(r); + + } else { + ngx_http_weak_etag(r); + } + } + + 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) +{ + size_t len; + ngx_int_t rc; + ngx_buf_t *b; + ngx_uint_t i, index; + ngx_chain_t *cl, **ll; + ngx_table_elt_t *param; + ngx_http_ssi_ctx_t *ctx, *mctx; + ngx_http_ssi_block_t *bl; + ngx_http_ssi_param_t *prm; + ngx_http_ssi_command_t *cmd; + ngx_http_ssi_loc_conf_t *slcf; + ngx_http_ssi_main_conf_t *smcf; + ngx_str_t *params[NGX_HTTP_SSI_MAX_PARAMS + 1]; + + ctx = ngx_http_get_module_ctx(r, ngx_http_ssi_filter_module); + + if (ctx == NULL + || (in == NULL + && ctx->buf == 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_OK) { + return NGX_ERROR; + } + } + + ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "http ssi filter \"%V?%V\"", &r->uri, &r->args); + + if (ctx->wait) { + + if (r != r->connection->data) { + ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "http ssi filter wait \"%V?%V\" non-active", + &ctx->wait->uri, &ctx->wait->args); + + return NGX_AGAIN; + } + + if (ctx->wait->done) { + ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "http ssi filter wait \"%V?%V\" done", + &ctx->wait->uri, &ctx->wait->args); + + ctx->wait = NULL; + + } else { + ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "http ssi filter wait \"%V?%V\"", + &ctx->wait->uri, &ctx->wait->args); + + return ngx_http_next_body_filter(r, NULL); + } + } + + slcf = ngx_http_get_module_loc_conf(r, ngx_http_ssi_filter_module); + + 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: %uz state: %ui", ctx->saved, ctx->state); + + rc = ngx_http_ssi_parse(r, ctx); + + ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "parse: %i, looked: %uz %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: %uz", 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 (slcf->min_file_chunk < (size_t) (b->last - b->pos)) + { + b->file_last = b->file_pos + + (b->last - ctx->buf->pos); + b->file_pos += b->pos - ctx->buf->pos; + + } else { + b->in_file = 0; + } + } + + cl->next = NULL; + *ctx->last_out = cl; + ctx->last_out = &cl->next; + + } else { + if (ctx->block + && ctx->saved + (ctx->copy_end - ctx->copy_start)) + { + b = ngx_create_temp_buf(r->pool, + ctx->saved + (ctx->copy_end - ctx->copy_start)); + + if (b == NULL) { + return NGX_ERROR; + } + + if (ctx->saved) { + b->last = ngx_cpymem(b->pos, ngx_http_ssi_string, + ctx->saved); + } + + b->last = ngx_cpymem(b->last, ctx->copy_start, + ctx->copy_end - ctx->copy_start); + + cl = ngx_alloc_chain_link(r->pool); + if (cl == NULL) { + return NGX_ERROR; + } + + cl->buf = b; + cl->next = NULL; + + b = NULL; + + mctx = ngx_http_get_module_ctx(r->main, + ngx_http_ssi_filter_module); + bl = mctx->blocks->elts; + for (ll = &bl[mctx->blocks->nelts - 1].bufs; + *ll; + ll = &(*ll)->next) + { + /* void */ + } + + *ll = cl; + } + + 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; + } + + + b = NULL; + + if (rc == NGX_OK) { + + smcf = ngx_http_get_module_main_conf(r, + ngx_http_ssi_filter_module); + + cmd = ngx_hash_find(&smcf->hash, ctx->key, ctx->command.data, + ctx->command.len); + + if (cmd == NULL) { + if (ctx->output) { + ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, + "invalid SSI command: \"%V\"", + &ctx->command); + goto ssi_error; + } + + continue; + } + + if (!ctx->output && !cmd->block) { + + if (ctx->block) { + + /* reconstruct the SSI command text */ + + len = 5 + ctx->command.len + 4; + + param = ctx->params.elts; + for (i = 0; i < ctx->params.nelts; i++) { + len += 1 + param[i].key.len + 2 + + param[i].value.len + 1; + } + + b = ngx_create_temp_buf(r->pool, len); + + if (b == NULL) { + return NGX_ERROR; + } + + cl = ngx_alloc_chain_link(r->pool); + if (cl == NULL) { + return NGX_ERROR; + } + + cl->buf = b; + cl->next = NULL; + + *b->last++ = '<'; + *b->last++ = '!'; + *b->last++ = '-'; + *b->last++ = '-'; + *b->last++ = '#'; + + b->last = ngx_cpymem(b->last, ctx->command.data, + ctx->command.len); + + for (i = 0; i < ctx->params.nelts; i++) { + *b->last++ = ' '; + b->last = ngx_cpymem(b->last, param[i].key.data, + param[i].key.len); + *b->last++ = '='; + *b->last++ = '"'; + b->last = ngx_cpymem(b->last, param[i].value.data, + param[i].value.len); + *b->last++ = '"'; + } + + *b->last++ = ' '; + *b->last++ = '-'; + *b->last++ = '-'; + *b->last++ = '>'; + + mctx = ngx_http_get_module_ctx(r->main, + ngx_http_ssi_filter_module); + bl = mctx->blocks->elts; + for (ll = &bl[mctx->blocks->nelts - 1].bufs; + *ll; + ll = &(*ll)->next) + { + /* void */ + } + + *ll = cl; + + b = NULL; + + continue; + } + + if (cmd->conditional == 0) { + continue; + } + } + + if (cmd->conditional + && (ctx->conditional == 0 + || ctx->conditional > cmd->conditional)) + { + ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, + "invalid context of SSI command: \"%V\"", + &ctx->command); + goto ssi_error; + } + + if (ctx->params.nelts > NGX_HTTP_SSI_MAX_PARAMS) { + ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, + "too many SSI command parameters: \"%V\"", + &ctx->command); + goto ssi_error; + } + + ngx_memzero(params, + (NGX_HTTP_SSI_MAX_PARAMS + 1) * 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 (!prm->multiple) { + 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; + } + + for (index = prm->index; params[index]; index++) { + /* void */ + } + + params[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) { + + ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "ssi flush"); + + if (ngx_http_ssi_output(r, ctx) == NGX_ERROR) { + return NGX_ERROR; + } + } + + rc = cmd->handler(r, ctx, params); + + if (rc == NGX_OK) { + continue; + } + + if (rc == NGX_DONE || rc == NGX_AGAIN || rc == NGX_ERROR) { + ngx_http_ssi_buffered(r, ctx); + return rc; + } + } + + + /* rc == NGX_HTTP_SSI_ERROR */ + + ssi_error: + + if (slcf->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 || ngx_buf_in_memory(ctx->buf)) { + 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 (slcf->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; + +#if 1 + b = NULL; + for (cl = ctx->out; cl; cl = cl->next) { + ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "ssi out: %p %p", cl->buf, cl->buf->pos); + if (cl->buf == b) { + ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, + "the same buf was used in ssi"); + ngx_debug_point(); + return NGX_ERROR; + } + b = cl->buf; + } +#endif + + 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) { + + cl = ctx->busy; + b = cl->buf; + + if (ngx_buf_size(b) != 0) { + break; + } + + if (b->shadow) { + b->shadow->pos = b->shadow->last; + } + + ctx->busy = cl->next; + + if (ngx_buf_in_memory(b) || b->in_file) { + /* add data bufs only to the free buf chain */ + + cl->next = ctx->free; + ctx->free = cl; + } + } + + ngx_http_ssi_buffered(r, ctx); + + return rc; +} + + +static void +ngx_http_ssi_buffered(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx) +{ + if (ctx->in || ctx->buf) { + r->buffered |= NGX_HTTP_SSI_BUFFERED; + + } else { + r->buffered &= ~NGX_HTTP_SSI_BUFFERED; + } +} + + +static ngx_int_t +ngx_http_ssi_parse(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx) +{ + u_char *p, *value, *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->state = state; + 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: + /* not reached */ + 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 (p - ctx->pos < 4) { + 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_pnalloc(r->pool, + NGX_HTTP_SSI_COMMAND_LEN); + if (ctx->command.data == NULL) { + return NGX_ERROR; + } + + ctx->command.data[0] = ch; + + ctx->key = 0; + ctx->key = ngx_hash(ctx->key, 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: + if (ctx->command.len == NGX_HTTP_SSI_COMMAND_LEN) { + ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, + "the \"%V%c...\" SSI command is too long", + &ctx->command, ch); + + state = ssi_error_state; + break; + } + + ctx->command.data[ctx->command.len++] = ch; + ctx->key = ngx_hash(ctx->key, ch); + } + + 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_pnalloc(r->pool, + NGX_HTTP_SSI_PARAM_LEN); + if (ctx->param->key.data == NULL) { + return NGX_ERROR; + } + + ctx->param->key.data[0] = ch; + + ctx->param->value.len = 0; + + if (ctx->value_buf == NULL) { + ctx->param->value.data = ngx_pnalloc(r->pool, + ctx->value_len + 1); + if (ctx->param->value.data == NULL) { + return NGX_ERROR; + } + + } else { + ctx->param->value.data = ctx->value_buf; + } + + 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: + 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%c...\" parameter in " + "\"%V\" SSI command", + &ctx->param->key, ch, &ctx->command); + break; + } + + ctx->param->key.data[ctx->param->key.len++] = ch; + } + + 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 '"': + state = ssi_postparam_state; + break; + + case '\\': + ctx->saved_state = ssi_double_quoted_value_state; + state = ssi_quoted_symbol_state; + + /* fall through */ + + default: + if (ctx->param->value.len == ctx->value_len) { + ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, + "too long \"%V%c...\" value of \"%V\" " + "parameter in \"%V\" SSI command", + &ctx->param->value, ch, &ctx->param->key, + &ctx->command); + state = ssi_error_state; + break; + } + + ctx->param->value.data[ctx->param->value.len++] = ch; + } + + break; + + case ssi_quoted_value_state: + switch (ch) { + case '\'': + state = ssi_postparam_state; + break; + + case '\\': + ctx->saved_state = ssi_quoted_value_state; + state = ssi_quoted_symbol_state; + + /* fall through */ + + default: + if (ctx->param->value.len == ctx->value_len) { + ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, + "too long \"%V%c...\" value of \"%V\" " + "parameter in \"%V\" SSI command", + &ctx->param->value, ch, &ctx->param->key, + &ctx->command); + state = ssi_error_state; + break; + } + + ctx->param->value.data[ctx->param->value.len++] = ch; + } + + break; + + case ssi_quoted_symbol_state: + state = ctx->saved_state; + + if (ctx->param->value.len == ctx->value_len) { + ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, + "too long \"%V%c...\" value of \"%V\" " + "parameter in \"%V\" SSI command", + &ctx->param->value, ch, &ctx->param->key, + &ctx->command); + state = ssi_error_state; + break; + } + + ctx->param->value.data[ctx->param->value.len++] = ch; + + break; + + case ssi_postparam_state: + + if (ctx->param->value.len + 1 < ctx->value_len / 2) { + value = ngx_pnalloc(r->pool, ctx->param->value.len + 1); + if (value == NULL) { + return NGX_ERROR; + } + + ngx_memcpy(value, ctx->param->value.data, + ctx->param->value.len); + + ctx->value_buf = ctx->param->value.data; + ctx->param->value.data = value; + + } else { + ctx->value_buf = NULL; + } + + 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 key) +{ + ngx_uint_t i; + ngx_list_part_t *part; + 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); + +#if (NGX_PCRE) + { + ngx_str_t *value; + + if (key >= '0' && key <= '9') { + i = key - '0'; + + if (i < ctx->ncaptures) { + value = ngx_palloc(r->pool, sizeof(ngx_str_t)); + if (value == NULL) { + return NULL; + } + + i *= 2; + + value->data = ctx->captures_data + ctx->captures[i]; + value->len = ctx->captures[i + 1] - ctx->captures[i]; + + return value; + } + } + } +#endif + + if (ctx->variables == NULL) { + return NULL; + } + + part = &ctx->variables->part; + var = part->elts; + + for (i = 0; /* void */ ; i++) { + + if (i >= part->nelts) { + if (part->next == NULL) { + break; + } + + part = part->next; + var = part->elts; + i = 0; + } + + if (name->len != var[i].name.len) { + continue; + } + + if (key != var[i].key) { + continue; + } + + if (ngx_strncmp(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, *part_data; + size_t *size, len, prefix, part_len; + ngx_str_t var, *val; + ngx_int_t key; + ngx_uint_t i, n, bracket, quoted; + ngx_array_t lengths, values; + ngx_http_variable_value_t *vv; + + n = ngx_http_script_variables_count(text); + + if (n == 0) { + + data = text->data; + p = data; + + if ((flags & NGX_HTTP_SSI_ADD_PREFIX) && 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_pnalloc(r->pool, len); + if (data == NULL) { + return NGX_ERROR; + } + + p = ngx_copy(data, r->uri.data, prefix); + } + } + + quoted = 0; + + for (i = 0; i < text->len; i++) { + ch = text->data[i]; + + if (!quoted) { + + if (ch == '\\') { + quoted = 1; + continue; + } + + } else { + quoted = 0; + + if (ch != '\\' && ch != '\'' && ch != '"' && ch != '$') { + *p++ = '\\'; + } + } + + *p++ = ch; + } + + text->len = p - data; + text->data = data; + + return NGX_OK; + } + + if (ngx_array_init(&lengths, r->pool, 8, sizeof(size_t *)) != NGX_OK) { + return NGX_ERROR; + } + + if (ngx_array_init(&values, r->pool, 8, sizeof(u_char *)) != NGX_OK) { + return NGX_ERROR; + } + + len = 0; + i = 0; + + while (i < text->len) { + + if (text->data[i] == '$') { + + 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_HTTP_SSI_ERROR; + } + + if (var.len == 0) { + goto invalid_variable; + } + + key = ngx_hash_strlow(var.data, var.data, var.len); + + val = ngx_http_ssi_get_variable(r, &var, key); + + if (val == NULL) { + vv = ngx_http_get_variable(r, &var, key); + if (vv == NULL) { + return NGX_ERROR; + } + + if (vv->not_found) { + continue; + } + + part_data = vv->data; + part_len = vv->len; + + } else { + part_data = val->data; + part_len = val->len; + } + + } else { + part_data = &text->data[i]; + quoted = 0; + + for (p = part_data; i < text->len; i++) { + ch = text->data[i]; + + if (!quoted) { + + if (ch == '\\') { + quoted = 1; + continue; + } + + if (ch == '$') { + break; + } + + } else { + quoted = 0; + + if (ch != '\\' && ch != '\'' && ch != '"' && ch != '$') { + *p++ = '\\'; + } + } + + *p++ = ch; + } + + part_len = p - part_data; + } + + 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_pnalloc(r->pool, len + ((flags & NGX_HTTP_SSI_ADD_ZERO) ? 1 : 0)); + if (p == NULL) { + return NGX_ERROR; + } + + text->len = len; + text->data = p; + + p = ngx_copy(p, r->uri.data, prefix); + + for (i = 0; i < values.nelts; i++) { + p = ngx_copy(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_HTTP_SSI_ERROR; +} + + +static ngx_int_t +ngx_http_ssi_regex_match(ngx_http_request_t *r, ngx_str_t *pattern, + ngx_str_t *str) +{ +#if (NGX_PCRE) + int rc, *captures; + u_char *p, errstr[NGX_MAX_CONF_ERRSTR]; + size_t size; + ngx_int_t key; + ngx_str_t *vv, name, value; + ngx_uint_t i, n; + ngx_http_ssi_ctx_t *ctx; + ngx_http_ssi_var_t *var; + ngx_regex_compile_t rgc; + + ngx_memzero(&rgc, sizeof(ngx_regex_compile_t)); + + rgc.pattern = *pattern; + rgc.pool = r->pool; + rgc.err.len = NGX_MAX_CONF_ERRSTR; + rgc.err.data = errstr; + + if (ngx_regex_compile(&rgc) != NGX_OK) { + ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "%V", &rgc.err); + return NGX_HTTP_SSI_ERROR; + } + + n = (rgc.captures + 1) * 3; + + captures = ngx_palloc(r->pool, n * sizeof(int)); + if (captures == NULL) { + return NGX_ERROR; + } + + rc = ngx_regex_exec(rgc.regex, str, captures, n); + + if (rc < NGX_REGEX_NO_MATCHED) { + ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, + ngx_regex_exec_n " failed: %d on \"%V\" using \"%V\"", + rc, str, pattern); + return NGX_HTTP_SSI_ERROR; + } + + if (rc == NGX_REGEX_NO_MATCHED) { + return NGX_DECLINED; + } + + ctx = ngx_http_get_module_ctx(r->main, ngx_http_ssi_filter_module); + + ctx->ncaptures = rc; + ctx->captures = captures; + ctx->captures_data = str->data; + + if (rgc.named_captures > 0) { + + if (ctx->variables == NULL) { + ctx->variables = ngx_list_create(r->pool, 4, + sizeof(ngx_http_ssi_var_t)); + if (ctx->variables == NULL) { + return NGX_ERROR; + } + } + + size = rgc.name_size; + p = rgc.names; + + for (i = 0; i < (ngx_uint_t) rgc.named_captures; i++, p += size) { + + name.data = &p[2]; + name.len = ngx_strlen(name.data); + + n = 2 * ((p[0] << 8) + p[1]); + + value.data = &str->data[captures[n]]; + value.len = captures[n + 1] - captures[n]; + + key = ngx_hash_strlow(name.data, name.data, name.len); + + vv = ngx_http_ssi_get_variable(r, &name, key); + + if (vv) { + *vv = value; + continue; + } + + var = ngx_list_push(ctx->variables); + if (var == NULL) { + return NGX_ERROR; + } + + var->name = name; + var->key = key; + var->value = value; + } + } + + return NGX_OK; + +#else + + ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, + "the using of the regex \"%V\" in SSI requires PCRE library", + pattern); + return NGX_HTTP_SSI_ERROR; + +#endif +} + + +static ngx_int_t +ngx_http_ssi_include(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx, + ngx_str_t **params) +{ + ngx_int_t rc, key; + ngx_str_t *uri, *file, *wait, *set, *stub, args; + ngx_buf_t *b; + ngx_uint_t flags, i; + ngx_chain_t *cl, *tl, **ll, *out; + ngx_http_request_t *sr; + ngx_http_ssi_var_t *var; + ngx_http_ssi_ctx_t *mctx; + ngx_http_ssi_block_t *bl; + ngx_http_post_subrequest_t *psr; + + uri = params[NGX_HTTP_SSI_INCLUDE_VIRTUAL]; + file = params[NGX_HTTP_SSI_INCLUDE_FILE]; + wait = params[NGX_HTTP_SSI_INCLUDE_WAIT]; + set = params[NGX_HTTP_SSI_INCLUDE_SET]; + stub = params[NGX_HTTP_SSI_INCLUDE_STUB]; + + if (uri && file) { + ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, + "inclusion 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 (set && stub) { + ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, + "\"set\" and \"stub\" cannot be used together " + "in \"include\" SSI command"); + return NGX_HTTP_SSI_ERROR; + } + + if (wait) { + if (uri == NULL) { + ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, + "\"wait\" cannot be used with file=\"%V\"", file); + return NGX_HTTP_SSI_ERROR; + } + + if (wait->len == 2 + && ngx_strncasecmp(wait->data, (u_char *) "no", 2) == 0) + { + wait = NULL; + + } else if (wait->len != 3 + || ngx_strncasecmp(wait->data, (u_char *) "yes", 3) != 0) + { + ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, + "invalid value \"%V\" in the \"wait\" parameter", + wait); + return NGX_HTTP_SSI_ERROR; + } + } + + if (uri == NULL) { + uri = file; + wait = (ngx_str_t *) -1; + } + + rc = ngx_http_ssi_evaluate_string(r, ctx, uri, NGX_HTTP_SSI_ADD_PREFIX); + + if (rc != NGX_OK) { + return rc; + } + + ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "ssi include: \"%V\"", uri); + + ngx_str_null(&args); + flags = NGX_HTTP_LOG_UNSAFE; + + if (ngx_http_parse_unsafe_uri(r, uri, &args, &flags) != NGX_OK) { + return NGX_HTTP_SSI_ERROR; + } + + psr = NULL; + + mctx = ngx_http_get_module_ctx(r->main, ngx_http_ssi_filter_module); + + if (stub) { + if (mctx->blocks) { + bl = mctx->blocks->elts; + for (i = 0; i < mctx->blocks->nelts; i++) { + if (stub->len == bl[i].name.len + && ngx_strncmp(stub->data, bl[i].name.data, stub->len) == 0) + { + goto found; + } + } + } + + ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, + "\"stub\"=\"%V\" for \"include\" not found", stub); + return NGX_HTTP_SSI_ERROR; + + found: + + psr = ngx_palloc(r->pool, sizeof(ngx_http_post_subrequest_t)); + if (psr == NULL) { + return NGX_ERROR; + } + + psr->handler = ngx_http_ssi_stub_output; + + if (bl[i].count++) { + + out = NULL; + ll = &out; + + for (tl = bl[i].bufs; tl; tl = tl->next) { + + 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, tl->buf, sizeof(ngx_buf_t)); + + b->pos = b->start; + + *ll = cl; + cl->next = NULL; + ll = &cl->next; + } + + psr->data = out; + + } else { + psr->data = bl[i].bufs; + } + } + + if (wait) { + flags |= NGX_HTTP_SUBREQUEST_WAITED; + } + + if (set) { + key = ngx_hash_strlow(set->data, set->data, set->len); + + psr = ngx_palloc(r->pool, sizeof(ngx_http_post_subrequest_t)); + if (psr == NULL) { + return NGX_ERROR; + } + + psr->handler = ngx_http_ssi_set_variable; + psr->data = ngx_http_ssi_get_variable(r, set, key); + + if (psr->data == NULL) { + + if (mctx->variables == NULL) { + mctx->variables = ngx_list_create(r->pool, 4, + sizeof(ngx_http_ssi_var_t)); + if (mctx->variables == NULL) { + return NGX_ERROR; + } + } + + var = ngx_list_push(mctx->variables); + if (var == NULL) { + return NGX_ERROR; + } + + var->name = *set; + var->key = key; + var->value = ngx_http_ssi_null_string; + psr->data = &var->value; + } + + flags |= NGX_HTTP_SUBREQUEST_IN_MEMORY|NGX_HTTP_SUBREQUEST_WAITED; + } + + if (ngx_http_subrequest(r, uri, &args, &sr, psr, flags) != NGX_OK) { + return NGX_HTTP_SSI_ERROR; + } + + if (wait == NULL && set == NULL) { + return NGX_OK; + } + + if (ctx->wait == NULL) { + ctx->wait = sr; + + return NGX_AGAIN; + + } else { + ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, + "can only wait for one subrequest at a time"); + } + + return NGX_OK; +} + + +static ngx_int_t +ngx_http_ssi_stub_output(ngx_http_request_t *r, void *data, ngx_int_t rc) +{ + ngx_chain_t *out; + + if (rc == NGX_ERROR || r->connection->error || r->request_output) { + return rc; + } + + ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "ssi stub output: \"%V?%V\"", &r->uri, &r->args); + + out = data; + + if (!r->header_sent) { + r->headers_out.content_type_len = + r->parent->headers_out.content_type_len; + r->headers_out.content_type = r->parent->headers_out.content_type; + + if (ngx_http_send_header(r) == NGX_ERROR) { + return NGX_ERROR; + } + } + + return ngx_http_output_filter(r, out); +} + + +static ngx_int_t +ngx_http_ssi_set_variable(ngx_http_request_t *r, void *data, ngx_int_t rc) +{ + ngx_str_t *value = data; + + if (r->upstream) { + value->len = r->upstream->buffer.last - r->upstream->buffer.pos; + value->data = r->upstream->buffer.pos; + } + + return rc; +} + + +static ngx_int_t +ngx_http_ssi_echo(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx, + ngx_str_t **params) +{ + u_char *p; + uintptr_t len; + ngx_int_t key; + ngx_buf_t *b; + ngx_str_t *var, *value, *enc, text; + ngx_chain_t *cl; + ngx_http_variable_value_t *vv; + + var = params[NGX_HTTP_SSI_ECHO_VAR]; + + ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "ssi echo \"%V\"", var); + + key = ngx_hash_strlow(var->data, var->data, var->len); + + value = ngx_http_ssi_get_variable(r, var, key); + + if (value == NULL) { + vv = ngx_http_get_variable(r, var, key); + + if (vv == NULL) { + return NGX_HTTP_SSI_ERROR; + } + + if (!vv->not_found) { + text.data = vv->data; + text.len = vv->len; + value = &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; + } + } + + enc = params[NGX_HTTP_SSI_ECHO_ENCODING]; + + if (enc) { + if (enc->len == 4 && ngx_strncmp(enc->data, "none", 4) == 0) { + + ctx->encoding = NGX_HTTP_SSI_NO_ENCODING; + + } else if (enc->len == 3 && ngx_strncmp(enc->data, "url", 3) == 0) { + + ctx->encoding = NGX_HTTP_SSI_URL_ENCODING; + + } else if (enc->len == 6 && ngx_strncmp(enc->data, "entity", 6) == 0) { + + ctx->encoding = NGX_HTTP_SSI_ENTITY_ENCODING; + + } else { + ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, + "unknown encoding \"%V\" in the \"echo\" command", + enc); + } + } + + p = value->data; + + switch (ctx->encoding) { + + case NGX_HTTP_SSI_URL_ENCODING: + len = 2 * ngx_escape_uri(NULL, value->data, value->len, + NGX_ESCAPE_HTML); + + if (len) { + p = ngx_pnalloc(r->pool, value->len + len); + if (p == NULL) { + return NGX_HTTP_SSI_ERROR; + } + + (void) ngx_escape_uri(p, value->data, value->len, NGX_ESCAPE_HTML); + } + + len += value->len; + break; + + case NGX_HTTP_SSI_ENTITY_ENCODING: + len = ngx_escape_html(NULL, value->data, value->len); + + if (len) { + p = ngx_pnalloc(r->pool, value->len + len); + if (p == NULL) { + return NGX_HTTP_SSI_ERROR; + } + + (void) ngx_escape_html(p, value->data, value->len); + } + + len += value->len; + break; + + default: /* NGX_HTTP_SSI_NO_ENCODING */ + len = value->len; + break; + } + + 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 = p; + b->last = p + 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.len = value->len; + ctx->timefmt.data = ngx_pnalloc(r->pool, value->len + 1); + if (ctx->timefmt.data == NULL) { + return NGX_HTTP_SSI_ERROR; + } + + ngx_cpystrn(ctx->timefmt.data, value->data, value->len + 1); + } + + 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_int_t key, rc; + 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 == NULL) { + mctx->variables = ngx_list_create(r->pool, 4, + sizeof(ngx_http_ssi_var_t)); + if (mctx->variables == NULL) { + return NGX_ERROR; + } + } + + name = params[NGX_HTTP_SSI_SET_VAR]; + value = params[NGX_HTTP_SSI_SET_VALUE]; + + ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "ssi set \"%V\" \"%V\"", name, value); + + rc = ngx_http_ssi_evaluate_string(r, ctx, value, 0); + + if (rc != NGX_OK) { + return rc; + } + + key = ngx_hash_strlow(name->data, name->data, name->len); + + vv = ngx_http_ssi_get_variable(r, name, key); + + if (vv) { + *vv = *value; + return NGX_OK; + } + + var = ngx_list_push(mctx->variables); + if (var == NULL) { + return NGX_ERROR; + } + + var->name = *name; + var->key = key; + 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, flags; + + if (ctx->command.len == 2) { + if (ctx->conditional) { + ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, + "the \"if\" command inside the \"if\" command"); + return NGX_HTTP_SSI_ERROR; + } + } + + if (ctx->output_chosen) { + ctx->output = 0; + return NGX_OK; + } + + expr = params[NGX_HTTP_SSI_IF_EXPR]; + + ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "ssi if expr=\"%V\"", 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 == '_' + || *p == '"' || *p == '\'') + { + continue; + } + + break; + } + + left.len = p - left.data; + + while (p < last && *p == ' ') { + p++; + } + + flags = 0; + + ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "left: \"%V\"", &left); + + rc = ngx_http_ssi_evaluate_string(r, ctx, &left, flags); + + if (rc != NGX_OK) { + return rc; + } + + ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "evaluated left: \"%V\"", &left); + + if (p == last) { + if (left.len) { + ctx->output = 1; + ctx->output_chosen = 1; + + } else { + ctx->output = 0; + } + + ctx->conditional = NGX_HTTP_SSI_COND_IF; + + 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 - 1 && *p == '/') { + if (*(last - 1) != '/') { + goto invalid_expression; + } + + noregex = 0; + flags = NGX_HTTP_SSI_ADD_ZERO; + last--; + p++; + + } else { + noregex = 1; + flags = 0; + + if (p < last - 1 && p[0] == '\\' && p[1] == '/') { + p++; + } + } + + right.len = last - p; + right.data = p; + + ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "right: \"%V\"", &right); + + rc = ngx_http_ssi_evaluate_string(r, ctx, &right, flags); + + if (rc != NGX_OK) { + return rc; + } + + ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "evaluated right: \"%V\"", &right); + + if (noregex) { + if (left.len != right.len) { + rc = -1; + + } else { + rc = ngx_strncmp(left.data, right.data, right.len); + } + + } else { + right.data[right.len] = '\0'; + + rc = ngx_http_ssi_regex_match(r, &right, &left); + + if (rc == NGX_OK) { + rc = 0; + } else if (rc == NGX_DECLINED) { + rc = -1; + } else { + return rc; + } + } + + if ((rc == 0 && !negative) || (rc != 0 && negative)) { + ctx->output = 1; + ctx->output_chosen = 1; + + } else { + ctx->output = 0; + } + + ctx->conditional = NGX_HTTP_SSI_COND_IF; + + 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) +{ + ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "ssi else"); + + if (ctx->output_chosen) { + ctx->output = 0; + } else { + ctx->output = 1; + } + + ctx->conditional = NGX_HTTP_SSI_COND_ELSE; + + 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) +{ + ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "ssi endif"); + + ctx->output = 1; + ctx->output_chosen = 0; + ctx->conditional = 0; + + return NGX_OK; +} + + +static ngx_int_t +ngx_http_ssi_block(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx, + ngx_str_t **params) +{ + ngx_http_ssi_ctx_t *mctx; + ngx_http_ssi_block_t *bl; + + ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "ssi block"); + + mctx = ngx_http_get_module_ctx(r->main, ngx_http_ssi_filter_module); + + if (mctx->blocks == NULL) { + mctx->blocks = ngx_array_create(r->pool, 4, + sizeof(ngx_http_ssi_block_t)); + if (mctx->blocks == NULL) { + return NGX_HTTP_SSI_ERROR; + } + } + + bl = ngx_array_push(mctx->blocks); + if (bl == NULL) { + return NGX_HTTP_SSI_ERROR; + } + + bl->name = *params[NGX_HTTP_SSI_BLOCK_NAME]; + bl->bufs = NULL; + bl->count = 0; + + ctx->output = 0; + ctx->block = 1; + + return NGX_OK; +} + + +static ngx_int_t +ngx_http_ssi_endblock(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx, + ngx_str_t **params) +{ + ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "ssi endblock"); + + ctx->output = 1; + ctx->block = 0; + + return NGX_OK; +} + + +static ngx_int_t +ngx_http_ssi_date_gmt_local_variable(ngx_http_request_t *r, + ngx_http_variable_value_t *v, uintptr_t gmt) +{ + time_t now; + ngx_http_ssi_ctx_t *ctx; + ngx_str_t *timefmt; + struct tm tm; + char buf[NGX_HTTP_SSI_DATE_LEN]; + + v->valid = 1; + v->no_cacheable = 0; + v->not_found = 0; + + now = ngx_time(); + + ctx = ngx_http_get_module_ctx(r, ngx_http_ssi_filter_module); + + timefmt = ctx ? &ctx->timefmt : &ngx_http_ssi_timefmt; + + if (timefmt->len == sizeof("%s") - 1 + && timefmt->data[0] == '%' && timefmt->data[1] == 's') + { + v->data = ngx_pnalloc(r->pool, NGX_TIME_T_LEN); + if (v->data == NULL) { + return NGX_ERROR; + } + + v->len = ngx_sprintf(v->data, "%T", now) - v->data; + + return NGX_OK; + } + + if (gmt) { + ngx_libc_gmtime(now, &tm); + } else { + ngx_libc_localtime(now, &tm); + } + + v->len = strftime(buf, NGX_HTTP_SSI_DATE_LEN, + (char *) timefmt->data, &tm); + if (v->len == 0) { + return NGX_ERROR; + } + + v->data = ngx_pnalloc(r->pool, v->len); + if (v->data == NULL) { + return NGX_ERROR; + } + + ngx_memcpy(v->data, buf, v->len); + + return NGX_OK; +} + + +static ngx_int_t +ngx_http_ssi_preconfiguration(ngx_conf_t *cf) +{ + ngx_int_t rc; + ngx_http_variable_t *var, *v; + ngx_http_ssi_command_t *cmd; + ngx_http_ssi_main_conf_t *smcf; + + 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->get_handler = v->get_handler; + var->data = v->data; + } + + smcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_ssi_filter_module); + + for (cmd = ngx_http_ssi_commands; cmd->name.len; cmd++) { + rc = ngx_hash_add_key(&smcf->commands, &cmd->name, cmd, + NGX_HASH_READONLY_KEY); + + if (rc == NGX_OK) { + continue; + } + + if (rc == NGX_BUSY) { + ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, + "conflicting SSI command \"%V\"", &cmd->name); + } + + return NGX_ERROR; + } + + return NGX_OK; +} + + +static void * +ngx_http_ssi_create_main_conf(ngx_conf_t *cf) +{ + ngx_http_ssi_main_conf_t *smcf; + + smcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_ssi_main_conf_t)); + if (smcf == NULL) { + return NULL; + } + + smcf->commands.pool = cf->pool; + smcf->commands.temp_pool = cf->temp_pool; + + if (ngx_hash_keys_array_init(&smcf->commands, NGX_HASH_SMALL) != NGX_OK) { + return NULL; + } + + return smcf; +} + + +static char * +ngx_http_ssi_init_main_conf(ngx_conf_t *cf, void *conf) +{ + ngx_http_ssi_main_conf_t *smcf = conf; + + ngx_hash_init_t hash; + + hash.hash = &smcf->hash; + hash.key = ngx_hash_key; + hash.max_size = 1024; + hash.bucket_size = ngx_cacheline_size; + hash.name = "ssi_command_hash"; + hash.pool = cf->pool; + hash.temp_pool = NULL; + + if (ngx_hash_init(&hash, smcf->commands.keys.elts, + smcf->commands.keys.nelts) + != NGX_OK) + { + return NGX_CONF_ERROR; + } + + return NGX_CONF_OK; +} + + +static void * +ngx_http_ssi_create_loc_conf(ngx_conf_t *cf) +{ + ngx_http_ssi_loc_conf_t *slcf; + + slcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_ssi_loc_conf_t)); + if (slcf == NULL) { + return NULL; + } + + /* + * set by ngx_pcalloc(): + * + * conf->types = { NULL }; + * conf->types_keys = NULL; + */ + + slcf->enable = NGX_CONF_UNSET; + slcf->silent_errors = NGX_CONF_UNSET; + slcf->ignore_recycled_buffers = NGX_CONF_UNSET; + slcf->last_modified = NGX_CONF_UNSET; + + slcf->min_file_chunk = NGX_CONF_UNSET_SIZE; + slcf->value_len = NGX_CONF_UNSET_SIZE; + + return slcf; +} + + +static char * +ngx_http_ssi_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child) +{ + ngx_http_ssi_loc_conf_t *prev = parent; + ngx_http_ssi_loc_conf_t *conf = child; + + 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_value(conf->last_modified, prev->last_modified, 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, 255); + + if (ngx_http_merge_types(cf, &conf->types_keys, &conf->types, + &prev->types_keys, &prev->types, + ngx_http_html_default_types) + != NGX_OK) + { + return NGX_CONF_ERROR; + } + + return NGX_CONF_OK; +} + + +static ngx_int_t +ngx_http_ssi_filter_init(ngx_conf_t *cf) +{ + 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; +} |