Feat: init dataflow. (#9791)

### What problem does this PR solve?

#9790

Close #9782

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

rag/flow/tests/client.py

@@ -0,0 +1,57 @@
+#
+#  Copyright 2024 The InfiniFlow Authors. All Rights Reserved.
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+#
+import argparse
+import json
+import os
+import time
+from concurrent.futures import ThreadPoolExecutor
+import trio
+from api import settings
+from rag.flow.pipeline import Pipeline
+
+
+def print_logs(pipeline):
+    last_logs = "[]"
+    while True:
+        time.sleep(5)
+        logs = pipeline.fetch_logs()
+        logs_str = json.dumps(logs)
+        if logs_str != last_logs:
+            print(logs_str)
+        last_logs = logs_str
+
+
+if __name__ == '__main__':
+    parser = argparse.ArgumentParser()
+    dsl_default_path = os.path.join(
+        os.path.dirname(os.path.realpath(__file__)),
+        "dsl_examples",
+        "general_pdf_all.json",
+    )
+    parser.add_argument('-s', '--dsl', default=dsl_default_path, help="input dsl", action='store', required=True)
+    parser.add_argument('-d', '--doc_id', default=False, help="Document ID", action='store', required=True)
+    parser.add_argument('-t', '--tenant_id', default=False, help="Tenant ID", action='store', required=True)
+    args = parser.parse_args()
+
+    settings.init_settings()
+    pipeline = Pipeline(open(args.dsl, "r").read(), tenant_id=args.tenant_id, doc_id=args.doc_id, task_id="xxxx", flow_id="xxx")
+    pipeline.reset()
+
+    exe = ThreadPoolExecutor(max_workers=5)
+    thr = exe.submit(print_logs, pipeline)
+
+    trio.run(pipeline.run)
+    thr.result()