Added verify for last received stanza

src/server/verify.c

@@ -0,0 +1,70 @@
+#include <string.h>
+
+#include <expat.h>
+
+#include "server/stanza.h"
+#include "server/log.h"
+
+static int depth = 0;
+static XMPPStanza *curr_stanza = NULL;
+
+static void
+start_element(void *data, const char *element, const char **attributes)
+{
+    XMPPStanza *stanza = stanza_new(element, attributes);
+
+    if (depth == 0) {
+        curr_stanza = stanza;
+        curr_stanza->parent = NULL;
+    } else {
+        stanza->parent = curr_stanza;
+        curr_stanza = stanza;
+    }
+
+    depth++;
+}
+
+static void
+end_element(void *data, const char *element)
+{
+    depth--;
+
+    if (depth > 0) {
+        stanza_add_child(curr_stanza->parent, curr_stanza);
+        curr_stanza = curr_stanza->parent;
+    }
+}
+
+static void
+handle_data(void *data, const char *content, int length)
+{
+    if (!curr_stanza->content) {
+        curr_stanza->content = g_string_new("");
+    }
+
+    g_string_append_len(curr_stanza->content, content, length);
+}
+
+int
+verify_last(char *stanza_text)
+{
+    depth = 0;
+    if (curr_stanza) {
+        stanza_free(curr_stanza);
+    }
+    XML_Parser parser = XML_ParserCreate(NULL);
+    XML_SetElementHandler(parser, start_element, end_element);
+    XML_SetCharacterDataHandler(parser, handle_data);
+
+    XML_Parse(parser, stanza_text, strlen(stanza_text), 0);
+    XML_ParserFree(parser);
+
+    int result = stanza_verify_last(curr_stanza);
+    if (result) {
+        log_println("VERIFY SUCCESS: %s", stanza_text);
+    } else {
+        log_println("VERIFY FAIL: %s", stanza_text);
+    }
+
+    return result;
+}