Mercurial > hg > nginx
view src/http/modules/ngx_http_ssi_filter.c @ 122:cd91e4a1ad0d
nginx-0.0.1-2003-07-23-17:10:12 import
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Wed, 23 Jul 2003 13:10:12 +0000 |
parents | 6ce4755737b4 |
children | 885ffb8cc32a |
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#include <ngx_config.h> #include <ngx_core.h> #include <ngx_hunk.h> #include <ngx_event_write.h> #include <ngx_http.h> #include <ngx_http_config.h> static ngx_command_t ngx_http_ssi_filter_commands[]; static void *ngx_http_ssi_filter_create_conf(ngx_pool_t *pool); ngx_http_module_t ngx_http_ssi_filter_module = { NGX_HTTP_MODULE, NULL, /* create server config */ ngx_http_ssi_filter_create_conf, /* create location config */ ngx_http_ssi_filter_commands, /* module directives */ NULL, /* init module */ NULL /* init output body filter */ }; static ngx_command_t ngx_http_ssi_filter_commands[] = { {"ssi", ngx_conf_set_flag_slot, offsetof(ngx_http_ssi_filter_conf_t, on), NGX_HTTP_LOC_CONF, NGX_CONF_FLAG, "enable ssi filter"}, {NULL} }; int ngx_http_ssi_filter(ngx_http_request_t *r, ngx_chain_t *in) { ngx_chain_t *ch, **prev, *chain; ngx_http_ssi_filter_ctx_t *ctx; ngx_http_ssi_filter_conf_t *conf; if (in == NULL) return next_filter; ctx = (ngx_http_ssi_filter_ctx_t *) ngx_get_module_ctx(r, ngx_http_ssi_filter_module); if (ctx == NULL) { ngx_http_create_ctx(r, ctx, ngx_http_ssi_filter_module, sizeof(ngx_http_ssi_filter_ctx_t)); ctx->state = &ssi_start; ctx->handler = ngx_http_ssi_find_start; } ch = in; ctx->start = ctx->pos = ch->hunk->pos.mem; for ( ;; ) { if (ctx->handler(r, ctx, ch) == NGX_ERROR) return NGX_ERROR; if (ctx->pos + ctx->length == ch->hunk->last.mem) { ch = ch->next; if (ch == NULL) break; ctx->start = ctx->pos = ch->hunk->pos.mem; } } } static int ngx_http_ssi_find_start(ngx_http_request_t *r, ngx_http_ssi_filter_ctx_t *ctx, ngx_chain_t *ch) { ngx_http_ssi_parse(r, ctx, ch->hunk); if (ctx->state == ssi_command_state || (ctx->length > 0 && ch->next == NULL) || ctx->hunk_with_ssi) { ngx_test_null(h, ngx_palloc(r->pool, sizeof(ngx_hunk_t)), NGX_ERROR); #if !(HAVE_OFFSET_EQUAL_PTR) h->pos.file = h->last.file = 0; #endif h->pre_start = h->start = h->pos.mem = ctx->start; h->post_end = h->end = h->last.mem = ctx->pos; h->type = NGX_HUNK_TEMP; h->tag = 0; h->file = NULL; ngx_add_hunk_to_chain(ctx->last, h, r->pool, NGX_ERROR); ngx_test_null(ssi_hunk, ngx_push_array(ctx->ssi_hunks), NGX_ERROR); ssi_hunk->ssi_hunk = h; ssi_hunk->hunk = ch->hunk; ssi_hunk->pos = NULL; } if (ctx->state == ssi_command_state) ctx->handler = ngx_http_ssi_find_command; } return NGX_OK; } static int ngx_http_ssi_find_command(ngx_http_request_t *r, ngx_http_ssi_filter_ctx_t *ctx, ngx_chain_t *ch) { ngx_http_ssi_parse_command(r, ctx, ch->hunk); } static char ssi_start[] = "<!--#"; static char ssi_include[] = "include"; static ssi_parser_t ssi_pre_command_state[] = { { 1, (char *) ' ', ssi_pre_command_state, NULL }, { 7, "include", ssi_command_state, ssi_include_state }, { 4, "random", ssi_command_state, NULL }, { 0, NULL, ssi_error_state } }; static ssi_parser_t ssi_include_state[] = { { 1, (char *) ' ', ssi_include_state, NULL }, { 7, "virtual", ssi_equal_state, offsetof(ssi_include_t, virtual) }, { 0, NULL, ssi_error_state } }; static ssi_parser_t ssi_equal_state[] = { { 1, (char *) ' ', ssi_equal_state, NULL }, { 1, (char *) '=', ssi_param_state, NULL }, }; static char ssi_echo[] = "echo"; static void ngx_http_ssi_parse(ngx_http_request_t *r, ngx_http_ssi_filter_ctx_t *ctx, ngx_hunk_t *hunk) for ( ;; ) { for (/* void */ ; p < ch->hunk->last.mem; p++) { switch (state) { case ssi_start_state: /* tight loop */ while (p < ch->hunk->last.mem) { if (*p++ == '<') { state = ssi_comment_state; length = 1; break; } } /* fall through */ case ssi_comment_state: if (*p == ssi_start[length]) { length++; } else { length = 0; flush = 1; state = ssi_start_state; } if (length < 6) continue; state = ssi_space_before_command_state; /* fall through */ case ssi_space_before_command_state: if (*p == ' ' || *p == '\t' || *p == CR || *p == LF) continue; state = ssi_command_state; /* fall through */ case ssi_choose_command_state: for (i = 0; ctx->name[i].len; i++) { if (*p == ctx->name[i].name[0]) { state = choos[i].state; } } case ssi_command_state: if (*p == ssi_include[n]; n++; break; } } if (length == 6 || (length > 0 && ch->next == NULL) || hunk_with_ssi) { if (ctx->saved > 0 && flush) { add saved ctx->saved = 0; } for (c = ctx->in; c != hunk; c = c->next) { ngx_add_hunk_to_chain(ctx->last, c->hunk, r->pool, NGX_ERROR); } add duped; push duped_hunk, hunk, NULL; n = length - (hunk->last.mem - pos); for (c = hunk; c; c->next) { if (n > c->hunk->last.mem - c->hunk->pos.mem) { n -= c->hunk->last.mem - c->hunk->pos.mem; push NULL, c->hunk, NULL; } } ctx->in = c; } } } else { for (/* void */ ; p < ch->hunk->last.mem; p++) { if (*p == ' ' || *p == '\t' || *p == CR || *P == LF) continue; ctx->state = ssi_command_state; break; } if ( } } static void *ngx_http_ssi_filter_create_conf(ngx_pool_t *pool) { ngx_http_ssi_filter_conf_t *conf; ngx_test_null(conf, ngx_palloc(pool, sizeof(ngx_http_ssi_filter_conf_t)), NULL); conf->buffer_output = NGX_CONF_UNSET; return conf; }