fix(workflow): missing content in the answer node stream output during iterations (#8292)

Co-authored-by: -LAN- <laipz8200@outlook.com>

api/core/rag/extractor/word_extractor.py

@@ -7,8 +7,8 @@ import os
 import re
 import tempfile
 import uuid
-import xml.etree.ElementTree as ET
 from urllib.parse import urlparse
+from xml.etree import ElementTree
 
 import requests
 from docx import Document as DocxDocument
@@ -218,7 +218,7 @@ class WordExtractor(BaseExtractor):
                     hyperlinks_url = None
                 if "HYPERLINK" in run.element.xml:
                     try:
-                        xml = ET.XML(run.element.xml)
+                        xml = ElementTree.XML(run.element.xml)
                         x_child = [c for c in xml.iter() if c is not None]
                         for x in x_child:
                             if x_child is None:

api/core/workflow/nodes/iteration/iteration_node.py

@@ -16,6 +16,7 @@ from core.workflow.graph_engine.entities.event import (
     IterationRunNextEvent,
     IterationRunStartedEvent,
     IterationRunSucceededEvent,
+    NodeRunStreamChunkEvent,
     NodeRunSucceededEvent,
 )
 from core.workflow.graph_engine.entities.graph import Graph
@@ -154,7 +155,11 @@ class IterationNode(BaseNode):
                 if isinstance(event, (BaseNodeEvent | BaseParallelBranchEvent)) and not event.in_iteration_id:
                     event.in_iteration_id = self.node_id
 
-                if isinstance(event, BaseNodeEvent) and event.node_type == NodeType.ITERATION_START:
+                if (
+                    isinstance(event, BaseNodeEvent)
+                    and event.node_type == NodeType.ITERATION_START
+                    and not isinstance(event, NodeRunStreamChunkEvent)
+                ):
                     continue
 
                 if isinstance(event, NodeRunSucceededEvent):