# HG changeset patch
# User Igor Sysoev <igor@sysoev.ru>
# Date 1085155933 0
# Node ID 8c5b69141dfd09d373056c728db7193bdcfa4ee4
# Parent  0376cffa29e639d7a94d29784f0d4f583bc1eba9
nginx-0.0.3-2004-05-21-20:12:13 import

diff --git a/src/core/ngx_string.c b/src/core/ngx_string.c
--- a/src/core/ngx_string.c
+++ b/src/core/ngx_string.c
@@ -88,12 +88,12 @@ ngx_int_t ngx_hextoi(u_char *line, size_
         }
 
         if (ch >= 'A' && ch <= 'F') {
-            value = value * 16 + (*line - 'A');
+            value = value * 16 + (ch - 'A' + 10);
             continue;
         }
 
         if (ch >= 'a' && ch <= 'f') {
-            value = value * 16 + (*line - 'a');
+            value = value * 16 + (ch - 'a' + 10);
             continue;
         }
 
diff --git a/src/http/modules/ngx_http_charset_filter.c b/src/http/modules/ngx_http_charset_filter.c
--- a/src/http/modules/ngx_http_charset_filter.c
+++ b/src/http/modules/ngx_http_charset_filter.c
@@ -5,29 +5,55 @@
 
 
 typedef struct {
-    ngx_str_t   from;
-    ngx_str_t   to;
-    char       *table;
-} ngx_http_charset_table_t;
+    char       **tables;
+    ngx_str_t    name;
+    unsigned     server;
+} ngx_http_charset_t;
 
 
 typedef struct {
-    ngx_array_t  tables;                 /* ngx_http_charset_table_t */
+    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_str_t  default_charset;
+    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 void ngx_charset_recode(ngx_hunk_t *h, 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 int 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);
@@ -44,11 +70,32 @@ static ngx_command_t  ngx_http_charset_f
 
     { ngx_string("default_charset"),
       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
-      ngx_conf_set_str_slot,
+      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
 };
 
@@ -57,7 +104,7 @@ static ngx_http_module_t  ngx_http_chars
     NULL,                                  /* pre conf */
 
     ngx_http_charset_create_main_conf,     /* create main configuration */
-    NULL,                                  /* init main configuration */
+    ngx_http_charset_init_main_conf,       /* init main configuration */
 
     NULL,                                  /* create server configuration */
     NULL,                                  /* merge server configuration */
@@ -78,20 +125,28 @@ ngx_module_t  ngx_http_charset_filter_mo
 
 
 static ngx_http_output_header_filter_pt  ngx_http_next_header_filter;
-#if 0
 static ngx_http_output_body_filter_pt    ngx_http_next_body_filter;
-#endif
 
 
 static int ngx_http_charset_header_filter(ngx_http_request_t *r)
 {
-    ngx_http_charset_loc_conf_t  *lcf;
+    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 0
     if (lcf->default_charset.len == 0) {
         return ngx_http_next_header_filter(r);
     }
+#endif
 
     if (r->headers_out.content_type == NULL
         || ngx_strncasecmp(r->headers_out.content_type->value.data,
@@ -106,42 +161,151 @@ static int ngx_http_charset_header_filte
     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);
+    }
 
-    } else if (r->headers_out.charset.len == 0) {
-        r->headers_out.charset = lcf->default_charset;
+    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 |= NGX_HTTP_FILTER_NEED_IN_MEMORY;
+
     return ngx_http_next_header_filter(r);
 }
 
 
-#if 0
 static int ngx_http_charset_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
 {
-    ngx_log_debug(r->connection->log, "CHARSET BODY");
+    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->hunk, table);
+    }
+
     return ngx_http_next_body_filter(r, in);
 }
-#endif
+
+
+static void ngx_charset_recode(ngx_hunk_t *h, char *table)
+{
+    u_char  *p, c;
+
+    for (p = h->pos; p < h->last; p++) {
+        c = *p;
+        *p = table[c];
+    }
+}
 
 
 static char *ngx_charset_map_block(ngx_conf_t *cf, ngx_command_t *cmd,
                                    void *conf)
 {
-    char        *rv;
-    ngx_conf_t   pcf;
+    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 "
+                           "\"%s\" and \"%s\"",
+                           value[1].data, value[2].data);
+        return NGX_CONF_ERROR;
+    }
 
-    pcf = *cf;
+    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 "
+                               "\"%s\" and \"%s\"",
+                               value[1].data, value[2].data);
+            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] = i;
+        table->dst2src[i] = 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 = pcf;
+    *cf = pvcf;
 
     return rv;
 }
@@ -151,47 +315,112 @@ static char *ngx_charset_map(ngx_conf_t 
 {
     ngx_http_charset_main_conf_t  *mcf = conf;
 
-    ngx_int_t   src, dst;
-    ngx_str_t  *args;
+    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;
     }
 
-    args = cf->args->elts;
+    value = cf->args->elts;
 
-    src = ngx_hextoi(args[0].data, args[0].len);
+    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 \"%s\"", args[0].data);
+                           "invalid value \"%s\"", value[0].data);
+        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 \"%s\"", value[1].data);
         return NGX_CONF_ERROR;
     }
 
-    dst = ngx_hextoi(args[1].data, args[1].len);
-    if (dst == NGX_ERROR || dst > 255) {
-        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
-                           "invalid value \"%s\"", args[1].data);
+    table = cf->ctx;
+
+    table->src2dst[src] = dst;
+    table->dst2src[dst] = 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_conf_ctx_t           *ctx;
+    ngx_http_charset_main_conf_t  *mcf;
+
+    cp = (ngx_int_t *) (p + cmd->offset);
+
+    if (*cp != NGX_CONF_UNSET) {
+        return "is duplicate";
+    }
+
+    ctx = cf->ctx;
+    mcf = ctx->main_conf[ngx_http_charset_filter_module.ctx_index];
+    value = cf->args->elts;
+
+    *cp = ngx_http_add_charset(&mcf->charsets, &value[1]);
+    if (*cp == NGX_ERROR) {
         return NGX_CONF_ERROR;
     }
 
-#if 0
-    mcf->tables[src] = dst;
-#endif
+    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->name = *name;
+
+    return i;
+}
+
+
 static int 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;
 
-#if 0
     ngx_http_next_body_filter = ngx_http_top_body_filter;
     ngx_http_top_body_filter = ngx_http_charset_body_filter;
-#endif
 
     return NGX_OK;
 }
@@ -201,24 +430,93 @@ static void *ngx_http_charset_create_mai
 {
     ngx_http_charset_main_conf_t  *mcf;
 
-    ngx_test_null(mcf,
-                  ngx_pcalloc(cf->pool, sizeof(ngx_http_charset_main_conf_t)),
-                  NGX_CONF_ERROR);
+    if (!(mcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_charset_main_conf_t)))) {
+        return NGX_CONF_ERROR;
+    }
 
-    ngx_init_array(mcf->tables, cf->pool, 10, sizeof(ngx_http_charset_table_t),
+    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, *c;
+    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 "
+                          "\"%s\" and \"%s\"",
+                          charset[i].name.data, charset[n].name.data);
+            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;
 
-    ngx_test_null(lcf,
-                  ngx_pcalloc(cf->pool, sizeof(ngx_http_charset_loc_conf_t)),
-                  NGX_CONF_ERROR);
+    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;
 }
@@ -230,8 +528,16 @@ static char *ngx_http_charset_merge_loc_
     ngx_http_charset_loc_conf_t *prev = parent;
     ngx_http_charset_loc_conf_t *conf = child;
 
-    ngx_conf_merge_str_value(conf->default_charset,
-                             prev->default_charset, "");
+    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;
+    }
 
     return NGX_CONF_OK;
 }
diff --git a/src/http/ngx_http_core_module.c b/src/http/ngx_http_core_module.c
--- a/src/http/ngx_http_core_module.c
+++ b/src/http/ngx_http_core_module.c
@@ -826,7 +826,7 @@ static char *ngx_server_block(ngx_conf_t
     int                          m;
     char                        *rv;
     ngx_http_module_t           *module;
-    ngx_conf_t                   pcf;
+    ngx_conf_t                   pvcf;
     ngx_http_conf_ctx_t         *ctx, *hctx;
     ngx_http_core_main_conf_t   *cmcf;
     ngx_http_core_srv_conf_t    *cscf, **cscfp;
@@ -881,14 +881,11 @@ static char *ngx_server_block(ngx_conf_t
 
     /* parse inside server{} */
 
-    pcf = *cf;
-#if 0
-    pctx = cf->ctx;
-#endif
+    pvcf = *cf;
     cf->ctx = ctx;
     cf->cmd_type = NGX_HTTP_SRV_CONF;
     rv = ngx_conf_parse(cf, NULL);
-    *cf = pcf;
+    *cf = pvcf;
 
     if (rv != NGX_CONF_OK) {
         return rv;