fix: remove custom flattening for otel logs (#1019)

with generic flattening in place,
server doesn't need to perform custom flattening for the otel logs
client does not need to send additional header `X-P-Log-Source=OTEL`

for API `/v1/logs` which is specifically used for otel log ingestion
no custom logic is required to verify if header `X-P-Log-Source` is sent
no custom flattening is required either

server does the flattening if it finds the nested structure and ingests

src/handlers/http/ingest.rs

@@ -18,7 +18,6 @@
 
 use super::logstream::error::{CreateStreamError, StreamError};
 use super::modal::utils::ingest_utils::{flatten_and_push_logs, push_logs};
-use super::otel;
 use super::users::dashboards::DashboardError;
 use super::users::filters::FiltersError;
 use crate::event::{
@@ -27,7 +26,7 @@ use crate::event::{
     format::{self, EventFormat},
 };
 use crate::handlers::http::modal::utils::logstream_utils::create_stream_and_schema_from_storage;
-use crate::handlers::{LOG_SOURCE_KEY, LOG_SOURCE_OTEL, STREAM_NAME_HEADER_KEY};
+use crate::handlers::STREAM_NAME_HEADER_KEY;
 use crate::localcache::CacheError;
 use crate::metadata::error::stream_info::MetadataError;
 use crate::metadata::STREAM_INFO;
@@ -115,25 +114,7 @@ pub async fn ingest_otel_logs(req: HttpRequest, body: Bytes) -> Result<HttpRespo
     {
         let stream_name = stream_name.to_str().unwrap().to_owned();
         create_stream_if_not_exists(&stream_name, &StreamType::UserDefined.to_string()).await?;
-
-        //flatten logs
-        if let Some((_, log_source)) = req.headers().iter().find(|&(key, _)| key == LOG_SOURCE_KEY)
-        {
-            let log_source: String = log_source.to_str().unwrap().to_owned();
-            if log_source == LOG_SOURCE_OTEL {
-                let mut json = otel::flatten_otel_logs(&body);
-                for record in json.iter_mut() {
-                    let body: Bytes = serde_json::to_vec(record).unwrap().into();
-                    push_logs(stream_name.to_string(), req.clone(), body).await?;
-                }
-            } else {
-                return Err(PostError::CustomError("Unknown log source".to_string()));
-            }
-        } else {
-            return Err(PostError::CustomError(
-                "log source key header is missing".to_string(),
-            ));
-        }
+        push_logs(stream_name.to_string(), req.clone(), body).await?;
     } else {
         return Err(PostError::Header(ParseHeaderError::MissingStreamName));
     }

src/handlers/http/mod.rs

@@ -36,7 +36,6 @@ pub mod logstream;
 pub mod middleware;
 pub mod modal;
 pub mod oidc;
-mod otel;
 pub mod query;
 pub mod rbac;
 pub mod role;

src/handlers/http/modal/utils/ingest_utils.rs

@@ -16,10 +16,7 @@
  *
  */
 
-use std::{
-    collections::{BTreeMap, HashMap},
-    sync::Arc,
-};
+use std::{collections::HashMap, sync::Arc};
 
 use actix_web::HttpRequest;
 use arrow_schema::Field;
@@ -33,8 +30,8 @@ use crate::{
         format::{self, EventFormat},
     },
     handlers::{
-        http::{ingest::PostError, kinesis, otel},
-        LOG_SOURCE_KEY, LOG_SOURCE_KINESIS, LOG_SOURCE_OTEL, PREFIX_META, PREFIX_TAGS, SEPARATOR,
+        http::{ingest::PostError, kinesis},
+        LOG_SOURCE_KEY, LOG_SOURCE_KINESIS, PREFIX_META, PREFIX_TAGS, SEPARATOR,
     },
     metadata::STREAM_INFO,
     storage::StreamType,
@@ -46,26 +43,19 @@ pub async fn flatten_and_push_logs(
     body: Bytes,
     stream_name: String,
 ) -> Result<(), PostError> {
-    //flatten logs
-    if let Some((_, log_source)) = req.headers().iter().find(|&(key, _)| key == LOG_SOURCE_KEY) {
-        let mut json: Vec<BTreeMap<String, Value>> = Vec::new();
-        let log_source: String = log_source.to_str().unwrap().to_owned();
-        match log_source.as_str() {
-            LOG_SOURCE_KINESIS => json = kinesis::flatten_kinesis_logs(&body),
-            LOG_SOURCE_OTEL => {
-                json = otel::flatten_otel_logs(&body);
-            }
-            _ => {
-                log::warn!("Unknown log source: {}", log_source);
-                push_logs(stream_name.to_string(), req.clone(), body).await?;
-            }
-        }
-        for record in json.iter_mut() {
+    let log_source = req
+        .headers()
+        .get(LOG_SOURCE_KEY)
+        .map(|header| header.to_str().unwrap_or_default())
+        .unwrap_or_default();
+    if log_source == LOG_SOURCE_KINESIS {
+        let json = kinesis::flatten_kinesis_logs(&body);
+        for record in json.iter() {
             let body: Bytes = serde_json::to_vec(record).unwrap().into();
-            push_logs(stream_name.to_string(), req.clone(), body).await?;
+            push_logs(stream_name.clone(), req.clone(), body.clone()).await?;
         }
     } else {
-        push_logs(stream_name.to_string(), req, body).await?;
+        push_logs(stream_name, req, body).await?;
     }
     Ok(())
 }