APACHE_XLATE, CHARSET_EBCDIC stuff:

Provide new function ap_set_content_xlate() to simplify what needs
to be done to set up translation of content.  Use it where appropriate.

With this change, EBCDIC logic was tweaked so that ap_checkconv() does
not overlay a translation handle previously stored (e.g., by a module)
unless it is turning translation off.  Unless ap_checkconv() determines
that translation is inappropriate, it should leave the translation handle
alone.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85296 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 122 insertions, 0 deletions

diff --git a/server/util_charset.c b/server/util_charset.c
new file mode 100644
index 0000000000..8a613f9075
--- /dev/null
+++ b/server/util_charset.c
@@ -0,0 +1,122 @@
+/* ====================================================================
+ * The Apache Software License, Version 1.1
+ *
+ * Copyright (c) 2000 The Apache Software Foundation.  All rights
+ * reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. The end-user documentation included with the redistribution,
+ *    if any, must include the following acknowledgment:
+ *       "This product includes software developed by the
+ *        Apache Software Foundation (http://www.apache.org/)."
+ *    Alternately, this acknowledgment may appear in the software itself,
+ *    if and wherever such third-party acknowledgments normally appear.
+ *
+ * 4. The names "Apache" and "Apache Software Foundation" must
+ *    not be used to endorse or promote products derived from this
+ *    software without prior written permission. For written
+ *    permission, please contact apache@apache.org.
+ *
+ * 5. Products derived from this software may not be called "Apache",
+ *    nor may "Apache" appear in their name, without prior written
+ *    permission of the Apache Software Foundation.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This software consists of voluntary contributions made by many
+ * individuals on behalf of the Apache Software Foundation.  For more
+ * information on the Apache Software Foundation, please see
+ * <http://www.apache.org/>.
+ *
+ * Portions of this software are based upon public domain software
+ * originally written at the National Center for Supercomputing Applications,
+ * University of Illinois, Urbana-Champaign.
+ */
+
+#include "ap_config.h"
+
+#ifdef APACHE_XLATE
+
+#include "httpd.h"
+#include "http_log.h"
+#include "http_core.h"
+#include "util_charset.h"
+
+/* ap_hdrs_to_ascii, ap_hdrs_from_ascii
+ *
+ * These are the translation handles used to translate between the network
+ * format of protocol headers and the local machine format.
+ *
+ * For an EBCDIC machine, these are valid handles which are set up at
+ * initialization to translate between ISO-8859-1 and the code page of
+ * the source code.
+ *
+ * For an ASCII machine, these remain NULL so that when they are stored
+ * in the BUFF via ap_bsetop(BO_WXLATE or BO_RXLATE) it ensures that no
+ * translation is performed.
+ */
+ 
+ap_xlate_t *ap_hdrs_to_ascii, *ap_hdrs_from_ascii;
+
+/* ap_locale_to_ascii, ap_locale_from_ascii
+ *
+ * These handles are used for the translation of content, unless a
+ * configuration module overrides them.
+ *
+ * For an EBCDIC machine, these are valid handles which are set up at
+ * initialization to translate between ISO-8859-1 and the code page of
+ * the httpd process's locale.
+ *
+ * For an ASCII machine, these remain NULL so that no translation is
+ * performed (unless a configuration module does something, of course).
+ */
+
+ap_xlate_t *ap_locale_to_ascii, *ap_locale_from_ascii;
+
+API_EXPORT(ap_status_t) ap_set_content_xlate(request_rec *r, int output, 
+                                             ap_xlate_t *xlate)
+{
+    ap_status_t rv;
+
+    if (output) {
+        r->rrx->to_net = xlate;
+        rv = ap_bsetopt(r->connection->client, BO_WXLATE, &xlate);
+    }
+    else {
+        r->rrx->from_net = xlate;
+        rv = ap_bsetopt(r->connection->client, BO_RXLATE, &xlate);
+    }
+
+    if (rv) {
+        ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
+                      "BO_%sXLATE failed",
+                      output ? "W" : "R");
+    }
+
+    return rv;
+}
+
+#endif /*APACHE_XLATE*/