Print track trace with vague failed requests

Author: Thomas Luijken

oxybox/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "oxybox"
-version = "1.0.2"
+version = "1.0.3"
 authors = ["Thomas Luijken"]
 categories = ["command-line-utilities"]
 description = "A drop in replacement for blackbox exporter for Prometheus, with support for TLS and HTTP/3."

oxybox/src/http_probe/mod.rs

@@ -1,2 +1,13 @@
 pub mod probe;
 pub mod result;
+
+use std::fmt::Write;
+
+fn report(mut err: &(dyn std::error::Error + 'static)) -> String {
+    let mut s = format!("{}", err);
+    while let Some(src) = err.source() {
+        let _ = write!(s, "\n\nCaused by: {}", src);
+        err = src;
+    }
+    s
+}

oxybox/src/http_probe/probe.rs

@@ -10,6 +10,7 @@ use tokio_native_tls::TlsConnector as TokioTlsConnector;
 use x509_parser::parse_x509_certificate;
 
 use crate::config::probe_config::{OrganisationConfig, TargetConfig};
+use crate::http_probe::report;
 use crate::mimir::client::send_to_mimir;
 use crate::mimir::create_probe_metrics;
 
@@ -201,7 +202,8 @@ async fn probe_url(
             )
         }
         Err(e) => {
-            log::error!("HTTP request failed for URL {url}: {e}");
+            let error = report(&e);
+            log::error!("HTTP request failed for URL {url}: {error}");
             return Err(format!("HTTP request failed for URL {url}: {e}"));
         }
     };