Mercurial > hg > nginx-ranges
view src/http/modules/ngx_http_charset_filter.c @ 34:aab2ea7c0458 NGINX_0_1_17
nginx 0.1.17
*) Change: the ngx_http_rewrite_module was rewritten from the scratch.
Now it is possible to redirect, to return the error codes, to check
the variables and referrers. The directives can be used inside
locations. The redirect directive was canceled.
*) Feature: the ngx_http_geo_module.
*) Feature: the proxy_set_x_var and fastcgi_set_var directives.
*) Bugfix: the location configuration with "=" modifier may be used in
another location.
*) Bugfix: the correct content type was set only for requests that use
small caps letters in extension.
*) Bugfix: if the proxy_pass or fastcgi_pass directives were set in the
location, and access was denied, and the error was redirected to a
static page, then the segmentation fault occurred.
*) Bugfix: if in a proxied "Location" header was a relative URL, then a
host name and a slash were added to them; bug appeared in 0.1.14.
*) Bugfix: the system error message was not logged on Linux.
author | Igor Sysoev <http://sysoev.ru> |
---|---|
date | Thu, 03 Feb 2005 00:00:00 +0300 |
parents | 45fe5b98a9de |
children | 6cfc63e68377 |
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/* * Copyright (C) Igor Sysoev */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_http.h> typedef struct { char **tables; ngx_str_t name; ngx_uint_t server; /* unsigned server:1; */ } ngx_http_charset_t; typedef struct { ngx_int_t src; ngx_int_t dst; char *src2dst; char *dst2src; } ngx_http_charset_tables_t; typedef struct { ngx_array_t charsets; /* ngx_http_charset_t */ ngx_array_t tables; /* ngx_http_charset_tables_t */ } ngx_http_charset_main_conf_t; typedef struct { ngx_flag_t enable; ngx_flag_t autodetect; ngx_int_t default_charset; ngx_int_t source_charset; } ngx_http_charset_loc_conf_t; typedef struct { ngx_int_t server; ngx_int_t client; } ngx_http_charset_ctx_t; static ngx_uint_t ngx_charset_recode(ngx_buf_t *b, char *table); static char *ngx_charset_map_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static char *ngx_charset_map(ngx_conf_t *cf, ngx_command_t *dummy, void *conf); static char *ngx_http_set_charset_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static ngx_int_t ngx_http_add_charset(ngx_array_t *charsets, ngx_str_t *name); static ngx_int_t ngx_http_charset_filter_init(ngx_cycle_t *cycle); static void *ngx_http_charset_create_main_conf(ngx_conf_t *cf); static char *ngx_http_charset_init_main_conf(ngx_conf_t *cf, void *conf); static void *ngx_http_charset_create_loc_conf(ngx_conf_t *cf); static char *ngx_http_charset_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child); static ngx_command_t ngx_http_charset_filter_commands[] = { { ngx_string("charset_map"), NGX_HTTP_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_TAKE2, ngx_charset_map_block, NGX_HTTP_MAIN_CONF_OFFSET, 0, NULL }, { ngx_string("default_charset"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, ngx_http_set_charset_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_charset_loc_conf_t, default_charset), NULL }, { ngx_string("source_charset"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, ngx_http_set_charset_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_charset_loc_conf_t, source_charset), NULL }, { ngx_string("charset"), 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_charset_loc_conf_t, enable), NULL }, { ngx_string("autodetect_charset"), 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_charset_loc_conf_t, autodetect), NULL }, ngx_null_command }; static ngx_http_module_t ngx_http_charset_filter_module_ctx = { NULL, /* pre conf */ ngx_http_charset_create_main_conf, /* create main configuration */ ngx_http_charset_init_main_conf, /* init main configuration */ NULL, /* create server configuration */ NULL, /* merge server configuration */ ngx_http_charset_create_loc_conf, /* create location configuration */ ngx_http_charset_merge_loc_conf /* merge location configuration */ }; ngx_module_t ngx_http_charset_filter_module = { NGX_MODULE, &ngx_http_charset_filter_module_ctx, /* module context */ ngx_http_charset_filter_commands, /* module directives */ NGX_HTTP_MODULE, /* module type */ ngx_http_charset_filter_init, /* init module */ NULL /* init process */ }; 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 ngx_int_t ngx_http_charset_header_filter(ngx_http_request_t *r) { ngx_http_charset_t *charsets; ngx_http_charset_ctx_t *ctx; ngx_http_charset_loc_conf_t *lcf; ngx_http_charset_main_conf_t *mcf; mcf = ngx_http_get_module_main_conf(r, ngx_http_charset_filter_module); lcf = ngx_http_get_module_loc_conf(r, ngx_http_charset_filter_module); if (lcf->enable == 0) { return ngx_http_next_header_filter(r); } if (r->headers_out.content_type == NULL) { return ngx_http_next_header_filter(r); } if (ngx_strncasecmp(r->headers_out.content_type->value.data, "text/", 5) != 0 && ngx_strncasecmp(r->headers_out.content_type->value.data, "application/x-javascript", 24) != 0) { return ngx_http_next_header_filter(r); } if (ngx_strstr(r->headers_out.content_type->value.data, "charset") != NULL) { return ngx_http_next_header_filter(r); } if (r->headers_out.status == NGX_HTTP_MOVED_PERMANENTLY && r->headers_out.status == NGX_HTTP_MOVED_TEMPORARILY) { /* * do not set charset for the redirect because NN 4.x uses this * charset instead of the next page charset */ r->headers_out.charset.len = 0; return ngx_http_next_header_filter(r); } if (r->headers_out.charset.len) { return ngx_http_next_header_filter(r); } charsets = mcf->charsets.elts; r->headers_out.charset = charsets[lcf->default_charset].name; if (lcf->default_charset == lcf->source_charset) { return ngx_http_next_header_filter(r); } ngx_http_create_ctx(r, ctx, ngx_http_charset_filter_module, sizeof(ngx_http_charset_ctx_t), NGX_ERROR); r->filter_need_in_memory = 1; return ngx_http_next_header_filter(r); } static ngx_int_t ngx_http_charset_body_filter(ngx_http_request_t *r, ngx_chain_t *in) { char *table; ngx_chain_t *cl; ngx_http_charset_t *charsets; ngx_http_charset_ctx_t *ctx; ngx_http_charset_loc_conf_t *lcf; ngx_http_charset_main_conf_t *mcf; ctx = ngx_http_get_module_ctx(r, ngx_http_charset_filter_module); if (ctx == NULL) { return ngx_http_next_body_filter(r, in); } mcf = ngx_http_get_module_main_conf(r, ngx_http_charset_filter_module); lcf = ngx_http_get_module_loc_conf(r, ngx_http_charset_filter_module); charsets = mcf->charsets.elts; table = charsets[lcf->source_charset].tables[lcf->default_charset]; for (cl = in; cl; cl = cl->next) { ngx_charset_recode(cl->buf, table); } return ngx_http_next_body_filter(r, in); } static ngx_uint_t ngx_charset_recode(ngx_buf_t *b, char *table) { u_char *p; ngx_uint_t change; change = 0; for (p = b->pos; p < b->last; p++) { if (*p != table[*p]) { change = 1; break; } } if (change) { while (p < b->last) { *p = table[*p]; p++; } b->in_file = 0; } return change; } static char *ngx_charset_map_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_http_charset_main_conf_t *mcf = conf; char *rv; ngx_int_t src, dst; ngx_uint_t i; ngx_str_t *value; ngx_conf_t pvcf; ngx_http_charset_tables_t *table; value = cf->args->elts; src = ngx_http_add_charset(&mcf->charsets, &value[1]); if (src == NGX_ERROR) { return NGX_CONF_ERROR; } dst = ngx_http_add_charset(&mcf->charsets, &value[2]); if (dst == NGX_ERROR) { return NGX_CONF_ERROR; } if (src == dst) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "\"charset_map\" between the same charsets " "\"%V\" and \"%V\"", &value[1], &value[2]); return NGX_CONF_ERROR; } table = mcf->tables.elts; for (i = 0; i < mcf->tables.nelts; i++) { if ((src == table->src && dst == table->dst) || (src == table->dst && dst == table->src)) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "duplicate \"charset_map\" between " "\"%V\" and \"%V\"", &value[1], &value[2]); return NGX_CONF_ERROR; } } if (!(table = ngx_push_array(&mcf->tables))) { return NGX_CONF_ERROR; } table->src = src; table->dst = dst; if (!(table->src2dst = ngx_palloc(cf->pool, 256))) { return NGX_CONF_ERROR; } if (!(table->dst2src = ngx_palloc(cf->pool, 256))) { return NGX_CONF_ERROR; } for (i = 0; i < 128; i++) { table->src2dst[i] = (char) i; table->dst2src[i] = (char) i; } for (/* void */; i < 256; i++) { table->src2dst[i] = '?'; table->dst2src[i] = '?'; } pvcf = *cf; cf->ctx = table; cf->handler = ngx_charset_map; cf->handler_conf = conf; rv = ngx_conf_parse(cf, NULL); *cf = pvcf; return rv; } static char *ngx_charset_map(ngx_conf_t *cf, ngx_command_t *dummy, void *conf) { ngx_int_t src, dst; ngx_str_t *value; ngx_http_charset_tables_t *table; if (cf->args->nelts != 2) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid parameters number"); return NGX_CONF_ERROR; } value = cf->args->elts; src = ngx_hextoi(value[0].data, value[0].len); if (src == NGX_ERROR || src > 255) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid value \"%V\"", &value[0]); return NGX_CONF_ERROR; } dst = ngx_hextoi(value[1].data, value[1].len); if (dst == NGX_ERROR || dst > 255) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid value \"%V\"", &value[1]); return NGX_CONF_ERROR; } table = cf->ctx; table->src2dst[src] = (char) dst; table->dst2src[dst] = (char) src; return NGX_CONF_OK; } static char *ngx_http_set_charset_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { char *p = conf; ngx_int_t *cp; ngx_str_t *value; ngx_http_charset_t *charset; ngx_http_charset_main_conf_t *mcf; cp = (ngx_int_t *) (p + cmd->offset); if (*cp != NGX_CONF_UNSET) { return "is duplicate"; } mcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_charset_filter_module); value = cf->args->elts; *cp = ngx_http_add_charset(&mcf->charsets, &value[1]); if (*cp == NGX_ERROR) { return NGX_CONF_ERROR; } if (cmd->offset == offsetof(ngx_http_charset_loc_conf_t, source_charset)) { charset = mcf->charsets.elts; charset[*cp].server = 1; } return NGX_CONF_OK; } static ngx_int_t ngx_http_add_charset(ngx_array_t *charsets, ngx_str_t *name) { ngx_uint_t i; ngx_http_charset_t *c; c = charsets->elts; for (i = 0; i < charsets->nelts; i++) { if (name->len != c[i].name.len) { continue; } if (ngx_strcasecmp(name->data, c[i].name.data) == 0) { break; } } if (i < charsets->nelts) { return i; } if (!(c = ngx_push_array(charsets))) { return NGX_ERROR; } c->tables = NULL; c->name = *name; c->server = 0; return i; } static ngx_int_t ngx_http_charset_filter_init(ngx_cycle_t *cycle) { ngx_http_next_header_filter = ngx_http_top_header_filter; ngx_http_top_header_filter = ngx_http_charset_header_filter; ngx_http_next_body_filter = ngx_http_top_body_filter; ngx_http_top_body_filter = ngx_http_charset_body_filter; return NGX_OK; } static void *ngx_http_charset_create_main_conf(ngx_conf_t *cf) { ngx_http_charset_main_conf_t *mcf; if (!(mcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_charset_main_conf_t)))) { return NGX_CONF_ERROR; } ngx_init_array(mcf->charsets, cf->pool, 5, sizeof(ngx_http_charset_t), NGX_CONF_ERROR); ngx_init_array(mcf->tables, cf->pool, 10, sizeof(ngx_http_charset_tables_t), NGX_CONF_ERROR); return mcf; } static char *ngx_http_charset_init_main_conf(ngx_conf_t *cf, void *conf) { ngx_http_charset_main_conf_t *mcf = conf; ngx_uint_t i, n; ngx_http_charset_t *charset; ngx_http_charset_tables_t *tables; tables = mcf->tables.elts; charset = mcf->charsets.elts; for (i = 0; i < mcf->charsets.nelts; i++) { if (!charset[i].server) { continue; } charset[i].tables = ngx_pcalloc(cf->pool, sizeof(char *) * mcf->charsets.nelts); if (charset[i].tables == NULL) { return NGX_CONF_ERROR; } for (n = 0; n < mcf->tables.nelts; n++) { if ((ngx_int_t) i == tables[n].src) { charset[i].tables[tables[n].dst] = tables[n].src2dst; continue; } if ((ngx_int_t) i == tables[n].dst) { charset[i].tables[tables[n].src] = tables[n].dst2src; } } } for (i = 0; i < mcf->charsets.nelts; i++) { if (!charset[i].server) { continue; } for (n = 0; n < mcf->charsets.nelts; n++) { if (i == n) { continue; } if (charset[i].tables[n]) { continue; } ngx_log_error(NGX_LOG_EMERG, cf->log, 0, " no \"charset_map\" between the charsets " "\"%V\" and \"%V\"", &charset[i].name, &charset[n].name); return NGX_CONF_ERROR; } } return NGX_CONF_OK; } static void *ngx_http_charset_create_loc_conf(ngx_conf_t *cf) { ngx_http_charset_loc_conf_t *lcf; if (!(lcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_charset_loc_conf_t)))) { return NGX_CONF_ERROR; } lcf->enable = NGX_CONF_UNSET; lcf->autodetect = NGX_CONF_UNSET; lcf->default_charset = NGX_CONF_UNSET; lcf->source_charset = NGX_CONF_UNSET; return lcf; } static char *ngx_http_charset_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child) { ngx_http_charset_loc_conf_t *prev = parent; ngx_http_charset_loc_conf_t *conf = child; ngx_conf_merge_value(conf->enable, prev->enable, 0); ngx_conf_merge_value(conf->autodetect, prev->autodetect, 0); if (conf->default_charset == NGX_CONF_UNSET) { conf->default_charset = prev->default_charset; } if (conf->source_charset == NGX_CONF_UNSET) { conf->source_charset = prev->source_charset; } if (conf->default_charset == NGX_CONF_UNSET && conf->source_charset != NGX_CONF_UNSET) { conf->default_charset = conf->source_charset; } if (conf->source_charset == NGX_CONF_UNSET && conf->default_charset != NGX_CONF_UNSET) { conf->source_charset = conf->default_charset; } if (conf->enable && (conf->default_charset == NGX_CONF_UNSET || conf->source_charset == NGX_CONF_UNSET)) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "the \"source_charset\" or \"default_charset\" " "must be specified when \"charset\" is on"); return NGX_CONF_ERROR; } return NGX_CONF_OK; }