diff --git a/Makefile b/Makefile
index a4e9110e..745ff5b9 100644
--- a/Makefile
+++ b/Makefile
@@ -192,6 +192,7 @@ PYLINT_FILES=\
 	searx/engines/google_images.py \
 	searx/engines/mediathekviewweb.py \
 	searx/engines/solidtorrents.py \
+	searx/engines/solr.py \
 	searx/engines/google_scholar.py \
 	searx/engines/yahoo_news.py \
 	searx/engines/apkmirror.py \
diff --git a/searx/engines/acgsou.py b/searx/engines/acgsou.py
deleted file mode 100644
index ea9793f1..00000000
--- a/searx/engines/acgsou.py
+++ /dev/null
@@ -1,74 +0,0 @@
-# SPDX-License-Identifier: AGPL-3.0-or-later
-"""
- Acgsou (Japanese Animation/Music/Comics Bittorrent tracker)
-"""
-
-from urllib.parse import urlencode
-from lxml import html
-from searx.utils import extract_text, get_torrent_size, eval_xpath_list, eval_xpath_getindex
-
-# about
-about = {
-    "website": 'https://www.acgsou.com/',
-    "wikidata_id": None,
-    "official_api_documentation": None,
-    "use_official_api": False,
-    "require_api_key": False,
-    "results": 'HTML',
-}
-
-# engine dependent config
-categories = ['files', 'images', 'videos', 'music']
-paging = True
-
-# search-url
-base_url = 'https://www.acgsou.com/'
-search_url = base_url + 'search.php?{query}&page={offset}'
-# xpath queries
-xpath_results = '//table[contains(@class, "list_style table_fixed")]//tr[not(th)]'
-xpath_category = './/td[2]/a[1]'
-xpath_title = './/td[3]/a[last()]'
-xpath_torrent_links = './/td[3]/a'
-xpath_filesize = './/td[4]/text()'
-
-
-def request(query, params):
-    query = urlencode({'keyword': query})
-    params['url'] = search_url.format(query=query, offset=params['pageno'])
-    return params
-
-
-def response(resp):
-    results = []
-    dom = html.fromstring(resp.text)
-    for result in eval_xpath_list(dom, xpath_results):
-        # defaults
-        filesize = 0
-        magnet_link = "magnet:?xt=urn:btih:{}&tr=https://tracker.acgsou.com:2710/announce"
-
-        category = extract_text(eval_xpath_getindex(result, xpath_category, 0, default=[]))
-        page_a = eval_xpath_getindex(result, xpath_title, 0)
-        title = extract_text(page_a)
-        href = base_url + page_a.attrib.get('href')
-
-        magnet_link = magnet_link.format(page_a.attrib.get('href')[5:-5])
-
-        filesize_info = eval_xpath_getindex(result, xpath_filesize, 0, default=None)
-        if filesize_info:
-            try:
-                filesize = filesize_info[:-2]
-                filesize_multiplier = filesize_info[-2:]
-                filesize = get_torrent_size(filesize, filesize_multiplier)
-            except:
-                pass
-        # I didn't add download/seed/leech count since as I figured out they are generated randomly everytime
-        content = 'Category: "{category}".'
-        content = content.format(category=category)
-
-        results.append({'url': href,
-                        'title': title,
-                        'content': content,
-                        'filesize': filesize,
-                        'magnetlink': magnet_link,
-                        'template': 'torrent.html'})
-    return results
diff --git a/searx/engines/microsoft_academic.py b/searx/engines/microsoft_academic.py
index 14de4ac9..82a5d355 100644
--- a/searx/engines/microsoft_academic.py
+++ b/searx/engines/microsoft_academic.py
@@ -3,10 +3,7 @@
  Microsoft Academic (Science)
 """
 
-from datetime import datetime
-from json import loads
-from uuid import uuid4
-from urllib.parse import urlencode
+from json import dumps, loads
 from searx.utils import html_to_text
 
 # about
@@ -21,26 +18,25 @@ about = {
 
 categories = ['images']
 paging = True
-result_url = 'https://academic.microsoft.com/api/search/GetEntityResults?{query}'
+search_url = 'https://academic.microsoft.com/api/search'
+_paper_url = 'https://academic.microsoft.com/paper/{id}/reference'
 
 
 def request(query, params):
-    correlation_id = uuid4()
-    msacademic = uuid4()
-    time_now = datetime.now()
-
-    params['url'] = result_url.format(query=urlencode({'correlationId': correlation_id}))
-    params['cookies']['msacademic'] = str(msacademic)
-    params['cookies']['ai_user'] = 'vhd0H|{now}'.format(now=str(time_now))
+    params['url'] = search_url
     params['method'] = 'POST'
-    params['data'] = {
-        'Query': '@{query}@'.format(query=query),
-        'Limit': 10,
-        'Offset': params['pageno'] - 1,
-        'Filters': '',
-        'OrderBy': '',
-        'SortAscending': False,
-    }
+    params['headers']['content-type'] = 'application/json; charset=utf-8'
+    params['data'] = dumps({
+        'query': query,
+        'queryExpression': '',
+        'filters': [],
+        'orderBy': 0,
+        'skip': (params['pageno'] - 1) * 10,
+        'sortAscending': True,
+        'take': 10,
+        'includeCitationContexts': False,
+        'profileId': '',
+    })
 
     return params
 
@@ -51,10 +47,13 @@ def response(resp):
     if not response_data:
         return results
 
-    for result in response_data['results']:
-        url = _get_url(result)
-        title = result['e']['dn']
-        content = _get_content(result)
+    for result in response_data['pr']:
+        if 'dn' not in result['paper']:
+            continue
+
+        title = result['paper']['dn']
+        content = _get_content(result['paper'])
+        url = _paper_url.format(id=result['paper']['id'])
         results.append({
             'url': url,
             'title': html_to_text(title),
@@ -64,15 +63,9 @@ def response(resp):
     return results
 
 
-def _get_url(result):
-    if 's' in result['e']:
-        return result['e']['s'][0]['u']
-    return 'https://academic.microsoft.com/#/detail/{pid}'.format(pid=result['id'])
-
-
 def _get_content(result):
-    if 'd' in result['e']:
-        content = result['e']['d']
+    if 'd' in result:
+        content = result['d']
         if len(content) > 300:
             return content[:300] + '...'
         return content
diff --git a/searx/engines/solr.py b/searx/engines/solr.py
new file mode 100644
index 00000000..0bfcbab3
--- /dev/null
+++ b/searx/engines/solr.py
@@ -0,0 +1,74 @@
+# SPDX-License-Identifier: AGPL-3.0-or-later
+"""
+ Solr
+"""
+
+# pylint: disable=global-statement, missing-function-docstring
+
+from json import loads
+from urllib.parse import urlencode
+from searx.exceptions import SearxEngineAPIException
+
+
+base_url = 'http://localhost:8983'
+collection = ''
+rows = 10
+sort = '' # sorting: asc or desc
+field_list = 'name' # list of field names to display on the UI
+default_fields = '' # default field to query
+query_fields = '' # query fields
+_search_url = ''
+paging = True
+
+
+def init(_):
+    if collection == '':
+        raise ValueError('collection cannot be empty')
+
+    global _search_url
+    _search_url = base_url + '/solr/' + collection + '/select?{params}'
+
+
+def request(query, params):
+    query_params = {'q': query, 'rows': rows}
+    if field_list != '':
+        query_params['fl'] = field_list
+    if query_fields != '':
+        query_params['qf'] = query_fields
+    if default_fields != '':
+        query_params['df'] = default_fields
+    if sort != '':
+        query_params['sort'] = sort
+
+    if 'pageno' in params:
+        query_params['start'] = rows * (params['pageno'] - 1)
+
+    params['url'] = _search_url.format(params=urlencode(query_params))
+
+    return params
+
+
+def response(resp):
+    resp_json = __get_response(resp)
+
+    results = []
+    for result in resp_json['response']['docs']:
+        r = {key: str(value) for key, value in result.items()}
+        if len(r) == 0:
+            continue
+        r['template'] = 'key-value.html'
+        results.append(r)
+
+    return results
+
+
+def __get_response(resp):
+    try:
+        resp_json = loads(resp.text)
+    except Exception as e:
+        raise SearxEngineAPIException("failed to parse response") from e
+
+    if 'error' in resp_json:
+        raise SearxEngineAPIException(resp_json['error']['msg'])
+
+    return resp_json
diff --git a/searx/engines/yahoo_news.py b/searx/engines/yahoo_news.py
index 5f6734cb..49b3d1bf 100644
--- a/searx/engines/yahoo_news.py
+++ b/searx/engines/yahoo_news.py
@@ -22,13 +22,6 @@ from searx.utils import (
 
 from searx.engines.yahoo import parse_url
 
-# pylint: disable=unused-import
-from searx.engines.yahoo import (
-    _fetch_supported_languages,
-    supported_languages_url,
-)
-# pylint: enable=unused-import
-
 logger = logger.getChild('yahoo_news engine')
 
 # about
diff --git a/searx/engines/youtube_noapi.py b/searx/engines/youtube_noapi.py
index 90b93f0a..5b9e3e3f 100644
--- a/searx/engines/youtube_noapi.py
+++ b/searx/engines/youtube_noapi.py
@@ -4,7 +4,7 @@
 """
 
 from functools import reduce
-from json import loads
+from json import loads, dumps
 from urllib.parse import quote_plus
 
 # about
@@ -20,12 +20,15 @@ about = {
 # engine dependent config
 categories = ['videos', 'music']
 paging = True
+language_support = False
 time_range_support = True
 
 # search-url
 base_url = 'https://www.youtube.com/results'
 search_url = base_url + '?search_query={query}&page={page}'
 time_range_url = '&sp=EgII{time_range}%253D%253D'
+# the key seems to be constant
+next_page_url = 'https://www.youtube.com/youtubei/v1/search?key=AIzaSyAO_FJ2SlqU8Q4STEHLGCilw_Y9_11qcW8'
 time_range_dict = {'day': 'Ag',
                    'week': 'Aw',
                    'month': 'BA',
@@ -40,21 +43,73 @@ base_youtube_url = 'https://www.youtube.com/watch?v='
 
 # do search-request
 def request(query, params):
-    params['url'] = search_url.format(query=quote_plus(query),
-                                      page=params['pageno'])
-    if params['time_range'] in time_range_dict:
-        params['url'] += time_range_url.format(time_range=time_range_dict[params['time_range']])
+    if not params['engine_data'].get('next_page_token'):
+        params['url'] = search_url.format(query=quote_plus(query), page=params['pageno'])
+        if params['time_range'] in time_range_dict:
+            params['url'] += time_range_url.format(time_range=time_range_dict[params['time_range']])
+    else:
+        print(params['engine_data']['next_page_token'])
+        params['url'] = next_page_url
+        params['method'] = 'POST'
+        params['data'] = dumps({
+            'context': {"client": {"clientName": "WEB", "clientVersion": "2.20210310.12.01"}},
+            'continuation': params['engine_data']['next_page_token'],
+        })
+        params['headers']['Content-Type'] = 'application/json'
 
     return params
 
 
 # get response from search-request
 def response(resp):
+    if resp.search_params.get('engine_data'):
+        return parse_next_page_response(resp.text)
+    return parse_first_page_response(resp.text)
+
+
+def parse_next_page_response(response_text):
     results = []
+    result_json = loads(response_text)
+    with open("/tmp/x", "w") as f:
+        f.write(response_text)
+    for section in (result_json['onResponseReceivedCommands'][0]
+                    .get('appendContinuationItemsAction')['continuationItems'][0]
+                    .get('itemSectionRenderer')['contents']):
+        if 'videoRenderer' not in section:
+            continue
+        section = section['videoRenderer']
+        content = "-"
+        if 'descriptionSnippet' in section:
+            content = ' '.join(x['text'] for x in section['descriptionSnippet']['runs'])
+        results.append({
+            'url': base_youtube_url + section['videoId'],
+            'title': ' '.join(x['text'] for x in section['title']['runs']),
+            'content': content,
+            'author': section['ownerText']['runs'][0]['text'],
+            'length': section['lengthText']['simpleText'],
+            'template': 'videos.html',
+            'embedded': embedded_url.format(videoid=section['videoId']),
+            'thumbnail': section['thumbnail']['thumbnails'][-1]['url'],
+        })
+    try:
+        token = result_json['onResponseReceivedCommands'][0]\
+            .get('appendContinuationItemsAction')['continuationItems'][1]\
+            .get('continuationItemRenderer')['continuationEndpoint']\
+            .get('continuationCommand')['token']
+        results.append({
+            "engine_data": token,
+            "key": "next_page_token",
+        })
+    except:
+        pass
 
-    results_data = resp.text[resp.text.find('ytInitialData'):]
+    return results
+
+
+def parse_first_page_response(response_text):
+    results = []
+    results_data = response_text[response_text.find('ytInitialData'):]
     results_data = results_data[results_data.find('{'):results_data.find(';</script>')]
-
     results_json = loads(results_data) if results_data else {}
     sections = results_json.get('contents', {})\
                            .get('twoColumnSearchResultsRenderer', {})\
@@ -63,6 +118,16 @@ def response(resp):
                            .get('contents', [])
 
     for section in sections:
+        if "continuationItemRenderer" in section:
+            next_page_token = section["continuationItemRenderer"]\
+                .get("continuationEndpoint", {})\
+                .get("continuationCommand", {})\
+                .get("token", "")
+            if next_page_token:
+                results.append({
+                    "engine_data": next_page_token,
+                    "key": "next_page_token",
+                })
         for video_container in section.get('itemSectionRenderer', {}).get('contents', []):
             video = video_container.get('videoRenderer', {})
             videoid = video.get('videoId')
diff --git a/searx/settings.yml b/searx/settings.yml
index 85ba4b2f..a8d625b0 100644
--- a/searx/settings.yml
+++ b/searx/settings.yml
@@ -82,6 +82,8 @@ outgoing: # communication with search engines
 #        https:
 #            - http://proxy1:8080
 #            - http://proxy2:8080
+#    using_tor_proxy : True
+#    extra_proxy_timeout : 10.0 # Extra seconds to add in order to account for the time taken by the proxy
 # uncomment below section only if you have more than one network interface
 # which can be the source of outgoing search requests
 #    source_ips:
@@ -159,6 +161,7 @@ engines:
   - name : ahmia
     engine : ahmia
     categories : onions
+    enable_http : True
     shortcut : ah
 
   - name : arch linux wiki
@@ -730,6 +733,8 @@ engines:
 # Requires Tor
   - name : not evil
     engine : not_evil
+    categories : onions
+    enable_http : True
     shortcut : ne
 
   - name : nyaa
@@ -737,12 +742,6 @@ engines:
     shortcut : nt
     disabled : True
 
-  - name : acgsou
-    engine : acgsou
-    shortcut : acg
-    disabled : True
-    timeout: 5.0
-
   - name : openairedatasets
     engine : json_engine
     paging : True
@@ -943,6 +942,17 @@ engines:
 #    api_client_id : *******
 #    api_client_secret : *******
 
+#  - name : solr
+#    engine : solr
+#    shortcut : slr
+#    base_url : http://localhost:8983
+#    collection : collection_name
+#    sort : '' # sorting: asc or desc
+#    field_list : '' # comma separated list of field names to display on the UI
+#    default_fields : '' # default field to query
+#    query_fields : '' # query fields
+#    enable_http : True
+
   - name : startpage
     engine : startpage
     shortcut : sp
@@ -979,6 +989,7 @@ engines:
     title_xpath : ./td[2]/b
     content_xpath : ./td[2]/small
     categories : onions
+    enable_http : True
     shortcut : tch
 
 # maybe in a fun category