<p></p>
<p><b>@wkampich</b> commented on this pull request.</p>

<hr>

<p>In <a href="https://github.com/kamailio/kamailio/pull/2675#discussion_r605170809">src/modules/lost/functions.c</a>:</p>
<pre style='color:#555'>> +                                            if(oldurl.s != NULL && oldurl.len > 0) {
+                                                       if(str_strcasecmp(&url, &oldurl) == 0) {
+                                                               LM_ERR("loop detected: "
+                                                                          "[%.*s]<-->[%.*s]\n",
+                                                                               oldurl.len, oldurl.s, url.len, url.s);
+                                                               goto err;
+                                                       }
+                                               }
+                                               /* remember the redirect target */
+                                               oldurl.s = lost_copy_string(url, &oldurl.len);
+                                               /* clean up */
+                                               lost_free_findServiceResponse(&fsrdata);
+                                               lost_free_string(&ret);
+                                               /* copy url */
+                                               len = 0;
+                                               urlrep = lost_copy_string(url, &len);
</pre>
<p>curl requires a zero terminated string as url, which is not added by the http_client API query function <code>http_client_query_c</code></p>

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