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nginx / nginx / d35dfe22ced7ae3682b98ab0d66d54cc0f50f6dd / . / src / http / modules / ngx_http_ssi_filter_module.c
blob: 6737965d14f2f43ed2399348e9e11c11f557b295 [file] [log] [blame]
/*
* 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_http_null_variable
};
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);
r->preserve_body = 1;
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;
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"unexpected \"-\" symbol after \"%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_uint_t i, n, bracket, quoted, key;
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_str_t *vv, name, value;
ngx_uint_t i, n, key;
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;
ngx_str_t *uri, *file, *wait, *set, *stub, args;
ngx_buf_t *b;
ngx_uint_t flags, i, key;
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->headers_out.status < NGX_HTTP_SPECIAL_RESPONSE
&& r->out && r->out->buf)
{
value->len = r->out->buf->last - r->out->buf->pos;
value->data = r->out->buf->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_buf_t *b;
ngx_str_t *var, *value, *enc, text;
ngx_uint_t key;
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_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 rc;
ngx_str_t *name, *value, *vv;
ngx_uint_t key;
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;
}