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-rw-r--r--app/nginx/src/http/modules/ngx_http_ssi_filter_module.c2930
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",
+ &param[i].key, &ctx->command);
+
+ goto ssi_error;
+ }
+
+ params[prm->index] = &param[i].value;
+
+ break;
+ }
+
+ for (index = prm->index; params[index]; index++) {
+ /* void */
+ }
+
+ params[index] = &param[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",
+ &param[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;
+}