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--- modules:1.0.x:append_hf_hf_comments [2007/02/05 16:31] – created 65.204.21.2
+++ modules:1.0.x:append_hf_hf_comments [Unknown date] (current) – external edit (Unknown date) 127.0.0.1
@@ Line 1: / Line 1: @@
+When you use append_hf, the new headers are only used for messages that are sent!
+Calling is_present_hf or a similar function will RETURN FALSE if you are looking for a header you added.
+append_hf("Test: Test\r\n");
+is_present_hf("Test"); <--- This will return FALSE
+route {
+  append_hf("Test: Test\r\n");
+  t_on_failure(2);
+}
+failure_route[1] {
+  is_present_hf("Test"); <--- This will return FALSE
+}
+So this should not be used for storing any kind of state. This is mentioned only briefly in "known limitations" section.