Fix component exception (#1603)

### What problem does this PR solve?


### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

graph/component/baidu.py

@@ -45,16 +45,20 @@ class Baidu(ComponentBase, ABC):
         if not ans:
             return Baidu.be_output("")
 
-        url = 'https://www.baidu.com/s?wd=' + ans + '&rn=' + str(self._param.top_n)
-        headers = {
-            'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.104 Safari/537.36'}
-        response = requests.get(url=url, headers=headers)
+        try:
+            url = 'https://www.baidu.com/s?wd=' + ans + '&rn=' + str(self._param.top_n)
+            headers = {
+                'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.104 Safari/537.36'}
+            response = requests.get(url=url, headers=headers)
 
-        url_res = re.findall(r"'url': \\\"(.*?)\\\"}", response.text)
-        title_res = re.findall(r"'title': \\\"(.*?)\\\",\\n", response.text)
-        body_res = re.findall(r"\"contentText\":\"(.*?)\"", response.text)
-        baidu_res = [{"content": re.sub('<em>|</em>', '', '<a href="' + url + '">' + title + '</a>    ' + body)} for url, title, body in zip(url_res, title_res, body_res)]
-        del body_res, url_res, title_res
+            url_res = re.findall(r"'url': \\\"(.*?)\\\"}", response.text)
+            title_res = re.findall(r"'title': \\\"(.*?)\\\",\\n", response.text)
+            body_res = re.findall(r"\"contentText\":\"(.*?)\"", response.text)
+            baidu_res = [{"content": re.sub('<em>|</em>', '', '<a href="' + url + '">' + title + '</a>    ' + body)} for
+                         url, title, body in zip(url_res, title_res, body_res)]
+            del body_res, url_res, title_res
+        except Exception as e:
+            return Baidu.be_output("**ERROR**: " + str(e))
 
         if not baidu_res:
             return Baidu.be_output("")