feat(client): support custom export path to export spans (#1342)

Author: yash025

langfuse/_client/client.py

@@ -49,6 +49,7 @@
 from langfuse._client.environment_variables import (
     LANGFUSE_DEBUG,
     LANGFUSE_HOST,
+    LANGFUSE_OTEL_TRACES_EXPORT_PATH,
     LANGFUSE_PUBLIC_KEY,
     LANGFUSE_SAMPLE_RATE,
     LANGFUSE_SECRET_KEY,

langfuse/_client/environment_variables.py

@@ -44,6 +44,15 @@
 **Default value:** ``"https://cloud.langfuse.com"``
 """
 
+LANGFUSE_OTEL_TRACES_EXPORT_PATH = "LANGFUSE_OTEL_TRACES_EXPORT_PATH"
+"""
+.. envvar:: LANGFUSE_OTEL_TRACES_EXPORT_PATH
+
+URL path on the configured host to export traces to.
+
+**Default value:** ``/api/public/otel/v1/traces``
+"""
+
 LANGFUSE_DEBUG = "LANGFUSE_DEBUG"
 """
 .. envvar:: LANGFUSE_DEBUG

langfuse/_client/span_processor.py

@@ -23,6 +23,7 @@
 from langfuse._client.environment_variables import (
     LANGFUSE_FLUSH_AT,
     LANGFUSE_FLUSH_INTERVAL,
+    LANGFUSE_OTEL_TRACES_EXPORT_PATH,
 )
 from langfuse._client.utils import span_formatter
 from langfuse.logger import langfuse_logger
@@ -90,8 +91,16 @@ def __init__(
         # Merge additional headers if provided
         headers = {**default_headers, **(additional_headers or {})}
 
+        traces_export_path = os.environ.get(LANGFUSE_OTEL_TRACES_EXPORT_PATH, None)
+
+        endpoint = (
+            f"{host}/{traces_export_path}"
+            if traces_export_path
+            else f"{host}/api/public/otel/v1/traces"
+        )
+
         langfuse_span_exporter = OTLPSpanExporter(
-            endpoint=f"{host}/api/public/otel/v1/traces",
+            endpoint=endpoint,
             headers=headers,
             timeout=timeout,
         )