community[minor]: Enable retrieval api calls in PebbloRetrievalQA (#21958)

Description: Enable app discovery and Prompt/Response apis in
PebbloSafeRetrieval
Documentation: NA
Unit test: N/A

---------

Signed-off-by: Rahul Tripathi <rauhl.psit.ec@gmail.com>
Co-authored-by: Rahul Tripathi <rauhl.psit.ec@gmail.com>

libs/community/langchain_community/chains/pebblo_retrieval/utilities.py

@@ -0,0 +1,65 @@
+import logging
+import os
+import platform
+from typing import Tuple
+
+from langchain_core.env import get_runtime_environment
+
+from langchain_community.chains.pebblo_retrieval.models import Framework, Runtime
+
+logger = logging.getLogger(__name__)
+
+PLUGIN_VERSION = "0.1.1"
+
+CLASSIFIER_URL = os.getenv("PEBBLO_CLASSIFIER_URL", "http://localhost:8000")
+PEBBLO_CLOUD_URL = os.getenv("PEBBLO_CLOUD_URL", "https://api.daxa.ai")
+
+PROMPT_URL = "/v1/prompt"
+APP_DISCOVER_URL = "/v1/app/discover"
+
+
+def get_runtime() -> Tuple[Framework, Runtime]:
+    """Fetch the current Framework and Runtime details.
+
+    Returns:
+        Tuple[Framework, Runtime]: Framework and Runtime for the current app instance.
+    """
+    runtime_env = get_runtime_environment()
+    framework = Framework(
+        name="langchain", version=runtime_env.get("library_version", None)
+    )
+    uname = platform.uname()
+    runtime = Runtime(
+        host=uname.node,
+        path=os.environ["PWD"],
+        platform=runtime_env.get("platform", "unknown"),
+        os=uname.system,
+        os_version=uname.version,
+        ip=get_ip(),
+        language=runtime_env.get("runtime", "unknown"),
+        language_version=runtime_env.get("runtime_version", "unknown"),
+    )
+
+    if "Darwin" in runtime.os:
+        runtime.type = "desktop"
+        runtime.runtime = "Mac OSX"
+
+    logger.debug(f"framework {framework}")
+    logger.debug(f"runtime {runtime}")
+    return framework, runtime
+
+
+def get_ip() -> str:
+    """Fetch local runtime ip address.
+
+    Returns:
+        str: IP address
+    """
+    import socket  # lazy imports
+
+    host = socket.gethostname()
+    try:
+        public_ip = socket.gethostbyname(host)
+    except Exception:
+        public_ip = socket.gethostbyname("localhost")
+    return public_ip