Up until this point, the XML output of the manager has been technically

invalid, due to the repetition of certain parameters in a single event.
This caused various issues for XML parsers, some of which refused to parse
at all, given the invalidity of the rendered XML.  So this commit fixes
the XML output, ensuring that each entity parameter has a unique name, thus
ensuring valid XML.
Reported by: msetim
Patch by: tilghman
(Closes issue #10220)


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@89536 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/manager.c

@@ -69,6 +69,7 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 #include "asterisk/threadstorage.h"
 #include "asterisk/linkedlists.h"
 #include "asterisk/term.h"
+#include "asterisk/astobj2.h"
 
 struct fast_originate_helper {
 	char tech[AST_MAX_EXTENSION];
@@ -274,6 +275,47 @@ static void xml_copy_escape(char **dst, size_t *maxlen, const char *src, int low
 	}
 }
 
+struct variable_count {
+	char *varname;
+	int count;
+};
+
+static int compress_char(char c)
+{
+	c &= 0x7f;
+	if (c < 32)
+		return 0;
+	else if (c >= 'a' && c <= 'z')
+		return c - 64;
+	else if (c > 'z')
+		return '_';
+	else
+		return c - 32;
+}
+
+static int variable_count_hash_fn(const void *vvc, const int flags)
+{
+	const struct variable_count *vc = vvc;
+	int res = 0, i;
+	for (i = 0; i < 5; i++) {
+		if (vc->varname[i] == '\0')
+			break;
+		res += compress_char(vc->varname[i]) << (i * 6);
+	}
+	return res;
+}
+
+static int variable_count_cmp_fn(void *obj, void *vstr, int flags)
+{
+	/* Due to the simplicity of struct variable_count, it makes no difference
+	 * if you pass in objects or strings, the same operation applies. This is
+	 * due to the fact that the hash occurs on the first element, which means
+	 * the address of both the struct and the string are exactly the same. */
+	struct variable_count *vc = obj;
+	char *str = vstr;
+	return !strcmp(vc->varname, str) ? CMP_MATCH : 0;
+}
+
 static char *xml_translate(char *in, struct ast_variable *vars)
 {
 	struct ast_variable *v;
@@ -287,7 +329,9 @@ static char *xml_translate(char *in, struct ast_variable *vars)
 	int escaped = 0;
 	int inobj = 0;
 	int x;
-	
+	struct variable_count *vc = NULL;
+	struct ao2_container *vco = NULL;
+
 	for (v = vars; v; v = v->next) {
 		if (!dest && !strcasecmp(v->name, "ajaxdest"))
 			dest = v->value;
@@ -303,7 +347,7 @@ static char *xml_translate(char *in, struct ast_variable *vars)
 			colons++;
 		else if (in[x] == '\n')
 			breaks++;
-		else if (strchr("&\"<>", in[x]))
+		else if (strchr("&\"<>\'", in[x]))
 			escaped++;
 	}
 	len = (size_t) (strlen(in) + colons * 5 + breaks * (40 + strlen(dest) + strlen(objtype)) + escaped * 10); /* foo="bar", "<response type=\"object\" id=\"dest\"", "&amp;" */
@@ -319,6 +363,10 @@ static char *xml_translate(char *in, struct ast_variable *vars)
 			if ((count > 3) && inobj) {
 				ast_build_string(&tmp, &len, " /></response>\n");
 				inobj = 0;
+
+				/* Entity is closed, so close out the name cache */
+				ao2_ref(vco, -1);
+				vco = NULL;
 			}
 			count = 0;
 			while (*in && (*in < 32)) {
@@ -333,19 +381,39 @@ static char *xml_translate(char *in, struct ast_variable *vars)
 				if (*val == ' ')
 					val++;
 				if (!inobj) {
+					vco = ao2_container_alloc(37, variable_count_hash_fn, variable_count_cmp_fn);
 					ast_build_string(&tmp, &len, "<response type='object' id='%s'><%s", dest, objtype);
 					inobj = 1;
 				}
-				ast_build_string(&tmp, &len, " ");				
+
+				/* Check if the var has been used already */
+				if ((vc = ao2_find(vco, var, 0)))
+					vc->count++;
+				else {
+					/* Create a new entry for this one */
+					vc = ao2_alloc(sizeof(*vc), NULL);
+					vc->varname = var;
+					vc->count = 1;
+					/* Increment refcount, because we're going to deref once later */
+					ao2_ref(vc, 1);
+					ao2_link(vco, vc);
+				}
+
+				ast_build_string(&tmp, &len, " ");
 				xml_copy_escape(&tmp, &len, var, 1);
+				if (vc->count > 1)
+					ast_build_string(&tmp, &len, "-%d", vc->count);
 				ast_build_string(&tmp, &len, "='");
 				xml_copy_escape(&tmp, &len, val, 0);
 				ast_build_string(&tmp, &len, "'");
+				ao2_ref(vc, -1);
 			}
 		}
 	}
 	if (inobj)
 		ast_build_string(&tmp, &len, " /></response>\n");
+	if (vco)
+		ao2_ref(vco, -1);
 	return out;
 }