influx: better error logging

src/datasources/influx.rs

@@ -46,8 +46,9 @@ pub fn parse_result(reader: Reader<impl Buf>) -> types::Result<MetricResult> {
 
     let hdrs = rdr.headers();
     if hdrs.is_err() {
+        eprintln!("Influx query error: headers are empty");
         return Err(anyhow::format_err!(
-            "Cant' extract metric: headers are empty"
+            "[Influx] Can't extract metric, check server logs for more info"
         ));
     }
 
@@ -60,12 +61,9 @@ pub fn parse_result(reader: Reader<impl Buf>) -> types::Result<MetricResult> {
     let measurement_name_position = 8usize;
 
     if hdrs.get(measurement_name_position).is_none() {
-        // println!("HEADERS:");
+        eprintln!("Influx query error: {:?}", hdrs);
-        // for h in hdrs {
-        //     println!("{}", h);
-        // }
         return Err(anyhow::format_err!(
-            "Cant' extract metric: no measurement at position {}", measurement_name_position
+            "[Influx] Can't extract metric, check server logs for more info"
         ));
     }
     // println!("len: {:?}", rdr.headers().unwrap().get(9));