4 Apr
2021
4 Apr
'21
11:21 p.m.
@wkampich commented on this pull request.
+ </itemizedlist>
+ <para>
+ The return value is 200 on success, 400 if an internal error occured, or 500 if an
+ error code is returned in the HELD response.
+ </para>
+ <para>
+ This function can be used from REQUEST_ROUTE,
+ ONREPLY_ROUTE, FAILURE_ROUTE, and BRANCH_ROUTE.
+ </para>
+ <example>
+ <title><function>lost_held_dereference()</function>
usage</title>
+ <programlisting format="linespecific">
+...
+# HELD location dereference
+if ($hdr(Geolocation)=~"^<http.*$") {
+ $var(url) = $(hdr(Geolocation){s.select,0,;});
@sergey-safarov: you may use the following to dereference multiple header fields:
```
## response time in ms: 20000, or 'emergencyRouting' or
'emergencyDispatch'
#!substdef "!MY_LOC_TIME!emergencyDispatch!g"
## location type: 'any', 'civic', 'geodetic', or 'civic
geodetic'
#!substdef "!MY_LOC_TYPE!any!g"
```
...
```
if(is_present_hf("Geolocation")) {
$var(count) = 0;
while($var(count) < $hdrc(Geolocation)) {
$var(geo) = $(hdr(Geolocation)[$var(count)]);
if ($var(geo)=~"^<http.*$") {
$var(url) = $(var(geo){s.select,0,;});
xlog("L_INFO", "### HELD dereferencing location at:
$(var(url){s.unbracket})\n");
$var(res) =
lost_held_dereference("$(var(url){s.unbracket})", "MY_LOC_TIME",
"MY_LOC_TYPE", "$var(pidf)", "$var(err)");
if ($var(res) == 200) {
xlog("L_INFO", "### HELD dereference
request returned loc:\n$var(pidf)\n");
} else {
xlog("L_INFO", "### held request failed
with $var(err)\n");
}
}
}
}
```
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