Expansions: fix json extract for de-wrapping nested objects. Bug 2322

diff --git a/src/src/expand.c b/src/src/expand.c
index 43f572ecaecc89d7ee9d866120417673a14da03d..4a88b4446c97114e7b0b4bf193c13480b803b916 100644 (file)
--- a/src/src/expand.c
+++ b/src/src/expand.c
@@ -3869,6 +3869,8 @@ static uschar *
 dewrap(uschar * s, const uschar * wrap)
 {
 uschar * p = s;
+unsigned depth = 0;
+BOOL quotesmode = wrap[0] == wrap[1];
 
 while (isspace(*p)) p++;
 
@@ -3879,11 +3881,15 @@ if (*p == *wrap)
   while (*p)
     {
     if (*p == '\\') p++;
+    else if (!quotesmode && *p == wrap[-1]) depth++;
     else if (*p == *wrap)
-      {
-      *p = '\0';
-      return s;
-      }
+      if (depth == 0)
+       {
+       *p = '\0';
+       return s;
+       }
+      else
+       depth--;
     p++;
     }
   }
@@ -3917,7 +3923,9 @@ for (item = s;
     case '}': object_depth--; break;
     }
 *list = *s ? s+1 : s;
-return string_copyn(item, s - item);
+item = string_copyn(item, s - item);
+DEBUG(D_expand) debug_printf_indent("  json ele: '%s'\n", item);
+return US item;
 }