Embedded XSLT stylesheets for service

[pazpar2-moved-to-github.git] / src / service_xslt.c

diff --git a/src/service_xslt.c b/src/service_xslt.c
new file mode 100644 (file)
index 0000000..bd4b580
--- /dev/null
+++ b/src/service_xslt.c
@@ -0,0 +1,123 @@
+/* This file is part of Pazpar2.
+   Copyright (C) 2006-2011 Index Data
+
+Pazpar2 is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 2, or (at your option) any later
+version.
+
+Pazpar2 is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+*/
+
+#if HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <string.h>
+#include <assert.h>
+
+#include <libxml/parser.h>
+#include <libxml/tree.h>
+
+#include <yaz/yaz-util.h>
+#include <yaz/nmem.h>
+#include <yaz/snprintf.h>
+#include <yaz/tpath.h>
+#include <yaz/xml_include.h>
+
+#include "service_xslt.h"
+#include "pazpar2_config.h"
+
+struct service_xslt
+{
+    char *id;
+    xsltStylesheetPtr xsp;
+    struct service_xslt *next;
+};
+    
+xsltStylesheetPtr service_xslt_get(struct conf_service *service,
+                                   const char *id)
+{
+    struct service_xslt *sx;
+    for (sx = service->xslt_list; sx; sx = sx->next)
+        if (!strcmp(id, sx->id))
+            return sx->xsp;
+    return 0;
+}
+
+void service_xslt_destroy(struct conf_service *service)
+{
+    struct service_xslt *sx = service->xslt_list;
+    for (; sx; sx = sx->next)
+        xsltFreeStylesheet(sx->xsp);
+}
+
+int service_xslt_config(struct conf_service *service, xmlNode *n)
+{
+    xmlDoc *xsp_doc;
+    xmlNode *root = n->children;
+    struct service_xslt *sx;
+    const char *id = 0;
+    struct _xmlAttr *attr;
+    for (attr = n->properties; attr; attr = attr->next)
+        if (!strcmp((const char *) attr->name, "id"))
+            id = (const char *) attr->children->content;
+        else
+        {
+            yaz_log(YLOG_FATAL, "Invalid attribute %s for xslt element",
+                    (const char *) n->name);
+            return -1;
+        }
+    if (!id)
+    {
+        yaz_log(YLOG_FATAL, "Missing attribute id for xslt element");
+        return 0;
+    }
+    while (root && root->type != XML_ELEMENT_NODE)
+        root = root->next;
+    if (!root)
+    {
+        yaz_log(YLOG_FATAL, "Missing content for xslt element");
+        return -1;
+    }
+    for (sx = service->xslt_list; sx; sx = sx->next)
+        if (!strcmp(sx->id, id))
+        {
+            yaz_log(YLOG_FATAL, "Multiple xslt with id=%s", id);
+            return -1;
+        }
+    
+    sx = nmem_malloc(service->nmem, sizeof(*sx));
+    sx->id = nmem_strdup(service->nmem, id);
+    sx->next = service->xslt_list;
+    service->xslt_list = sx;
+    
+    xsp_doc = xmlNewDoc(BAD_CAST "1.0");
+    xmlDocSetRootElement(xsp_doc, xmlCopyNode(root, 1));
+    sx->xsp = xsltParseStylesheetDoc(xsp_doc);
+    if (!sx->xsp)
+    {
+        xmlFreeDoc(xsp_doc);
+        yaz_log(YLOG_FATAL, "Failed to parse XSLT");
+        return -1;
+    }
+    return 0;
+}
+
+/*
+ * Local variables:
+ * c-basic-offset: 4
+ * c-file-style: "Stroustrup"
+ * indent-tabs-mode: nil
+ * End:
+ * vim: shiftwidth=4 tabstop=8 expandtab
+ */
+