fix(http_server source): panic when http server receives metric events (#18781)

* fix: panic when http server receives metric events

* refactor

Author: pront

src/sources/http_server.rs

@@ -2,23 +2,23 @@ use std::{collections::HashMap, net::SocketAddr};
 
 use bytes::{Bytes, BytesMut};
 use chrono::Utc;
+use http::{StatusCode, Uri};
+use http_serde;
+use tokio_util::codec::Decoder as _;
+use vrl::value::{kind::Collection, Kind};
+use warp::http::{HeaderMap, HeaderValue};
+
 use codecs::{
     decoding::{DeserializerConfig, FramingConfig},
     BytesDecoderConfig, BytesDeserializerConfig, JsonDeserializerConfig,
     NewlineDelimitedDecoderConfig,
 };
-
-use http::{StatusCode, Uri};
-use http_serde;
 use lookup::{lookup_v2::OptionalValuePath, owned_value_path, path};
-use tokio_util::codec::Decoder as _;
 use vector_config::configurable_component;
 use vector_core::{
     config::{DataType, LegacyKey, LogNamespace},
     schema::Definition,
 };
-use vrl::value::{kind::Collection, Kind};
-use warp::http::{HeaderMap, HeaderValue};
 
 use crate::{
     codecs::{Decoder, DecodingConfig},
@@ -385,37 +385,50 @@ struct SimpleHttpSource {
 }
 
 impl HttpSource for SimpleHttpSource {
-    /// Enriches the passed in events with metadata for the `request_path` and for each of the headers.
+    /// Enriches the log events with metadata for the `request_path` and for each of the headers.
+    /// Non-log events are skipped.
     fn enrich_events(
         &self,
         events: &mut [Event],
         request_path: &str,
         headers_config: &HeaderMap,
         query_parameters: &HashMap<String, String>,
     ) {
+        let now = Utc::now();
         for event in events.iter_mut() {
-            let log = event.as_mut_log();
-
-            // add request_path to each event
-            self.log_namespace.insert_source_metadata(
-                SimpleHttpConfig::NAME,
-                log,
-                self.path_key.path.as_ref().map(LegacyKey::InsertIfEmpty),
-                path!("path"),
-                request_path.to_owned(),
-            );
-
-            // add each header to each event
-            for header_name in &self.headers {
-                let value = headers_config.get(header_name).map(HeaderValue::as_bytes);
+            match event {
+                Event::Log(log) => {
+                    // add request_path to each event
+                    self.log_namespace.insert_source_metadata(
+                        SimpleHttpConfig::NAME,
+                        log,
+                        self.path_key.path.as_ref().map(LegacyKey::InsertIfEmpty),
+                        path!("path"),
+                        request_path.to_owned(),
+                    );
 
-                self.log_namespace.insert_source_metadata(
-                    SimpleHttpConfig::NAME,
-                    log,
-                    Some(LegacyKey::InsertIfEmpty(path!(header_name))),
-                    path!("headers", header_name),
-                    Value::from(value.map(Bytes::copy_from_slice)),
-                );
+                    // add each header to each event
+                    for header_name in &self.headers {
+                        let value = headers_config.get(header_name).map(HeaderValue::as_bytes);
+
+                        self.log_namespace.insert_source_metadata(
+                            SimpleHttpConfig::NAME,
+                            log,
+                            Some(LegacyKey::InsertIfEmpty(path!(header_name))),
+                            path!("headers", header_name),
+                            Value::from(value.map(Bytes::copy_from_slice)),
+                        );
+                    }
+
+                    self.log_namespace.insert_standard_vector_source_metadata(
+                        log,
+                        SimpleHttpConfig::NAME,
+                        now,
+                    );
+                }
+                _ => {
+                    continue;
+                }
             }
         }
 
@@ -426,17 +439,6 @@ impl HttpSource for SimpleHttpSource {
             self.log_namespace,
             SimpleHttpConfig::NAME,
         );
-
-        let now = Utc::now();
-        for event in events {
-            let log = event.as_mut_log();
-
-            self.log_namespace.insert_standard_vector_source_metadata(
-                log,
-                SimpleHttpConfig::NAME,
-                now,
-            );
-        }
     }
 
     fn build_events(
@@ -474,29 +476,29 @@ impl HttpSource for SimpleHttpSource {
 
 #[cfg(test)]
 mod tests {
-    use lookup::{event_path, owned_value_path, OwnedTargetPath};
     use std::str::FromStr;
     use std::{collections::BTreeMap, io::Write, net::SocketAddr};
-    use vector_core::config::LogNamespace;
-    use vector_core::event::LogEvent;
-    use vector_core::schema::Definition;
-    use vrl::value::kind::Collection;
-    use vrl::value::Kind;
 
-    use codecs::{
-        decoding::{DeserializerConfig, FramingConfig},
-        BytesDecoderConfig, JsonDeserializerConfig,
-    };
     use flate2::{
         write::{GzEncoder, ZlibEncoder},
         Compression,
     };
     use futures::Stream;
     use http::{HeaderMap, Method, StatusCode};
-    use lookup::lookup_v2::OptionalValuePath;
     use similar_asserts::assert_eq;
+    use vrl::value::kind::Collection;
+    use vrl::value::Kind;
+
+    use codecs::{
+        decoding::{DeserializerConfig, FramingConfig},
+        BytesDecoderConfig, JsonDeserializerConfig,
+    };
+    use lookup::lookup_v2::OptionalValuePath;
+    use lookup::{event_path, owned_value_path, OwnedTargetPath};
+    use vector_core::config::LogNamespace;
+    use vector_core::event::LogEvent;
+    use vector_core::schema::Definition;
 
-    use super::{remove_duplicates, SimpleHttpConfig};
     use crate::sources::http_server::HttpMethod;
     use crate::{
         config::{log_schema, SourceConfig, SourceContext},
@@ -508,6 +510,8 @@ mod tests {
         SourceSender,
     };
 
+    use super::{remove_duplicates, SimpleHttpConfig};
+
     #[test]
     fn generate_config() {
         crate::test_util::test_generate_config::<SimpleHttpConfig>();

src/sources/util/http/query.rs

@@ -16,13 +16,15 @@ pub fn add_query_parameters(
     for query_parameter_name in query_parameters_config {
         let value = query_parameters.get(query_parameter_name);
         for event in events.iter_mut() {
-            log_namespace.insert_source_metadata(
-                source_name,
-                event.as_mut_log(),
-                Some(LegacyKey::Overwrite(path!(query_parameter_name))),
-                path!("query_parameters"),
-                crate::event::Value::from(value.map(String::to_owned)),
-            );
+            if let Event::Log(log) = event {
+                log_namespace.insert_source_metadata(
+                    source_name,
+                    log,
+                    Some(LegacyKey::Overwrite(path!(query_parameter_name))),
+                    path!("query_parameters"),
+                    crate::event::Value::from(value.map(String::to_owned)),
+                );
+            }
         }
     }
 }