[fix] bandcamp: fix itemtype (album|track) and exceptions

BTW: polish implementation and show tracklist for albums

Closes: https://github.com/searxng/searxng/issues/883
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

searx/engines/bandcamp.py

@@ -1,16 +1,23 @@
-"""
-Bandcamp (Music)
+# SPDX-License-Identifier: AGPL-3.0-or-later
+# lint: pylint
+"""Bandcamp (Music)
 
 @website     https://bandcamp.com/
 @provide-api no
 @results     HTML
 @parse       url, title, content, publishedDate, iframe_src, thumbnail
+
 """
 
 from urllib.parse import urlencode, urlparse, parse_qs
 from dateutil.parser import parse as dateparse
 from lxml import html
-from searx.utils import extract_text
+
+from searx.utils import (
+    eval_xpath_getindex,
+    eval_xpath_list,
+    extract_text,
+)
 
 # about
 about = {
@@ -26,12 +33,13 @@ categories = ['music']
 paging = True
 
 base_url = "https://bandcamp.com/"
-search_string = search_string = 'search?{query}&page={page}'
-iframe_src = "https://bandcamp.com/EmbeddedPlayer/{type}={result_id}/size=large/bgcol=ffffff/linkcol=0687f5/tracklist=false/artwork=small/transparent=true/"
+search_string = 'search?{query}&page={page}'
+iframe_src = "https://bandcamp.com/EmbeddedPlayer/{type}={result_id}/size=large/bgcol=000/linkcol=fff/artwork=small"
 
 
 def request(query, params):
     '''pre-request callback
+
     params<dict>:
       method  : POST/GET
       headers : {}
@@ -42,37 +50,45 @@ def request(query, params):
     '''
 
     search_path = search_string.format(query=urlencode({'q': query}), page=params['pageno'])
-
     params['url'] = base_url + search_path
-
     return params
 
 
 def response(resp):
     '''post-response callback
+
     resp: requests response object
     '''
     results = []
-    tree = html.fromstring(resp.text)
-    search_results = tree.xpath('//li[contains(@class, "searchresult")]')
-    for result in search_results:
-        link = result.xpath('.//div[@class="itemurl"]/a')[0]
-        result_id = parse_qs(urlparse(link.get('href')).query)["search_item_id"][0]
+    dom = html.fromstring(resp.text)
+
+    for result in eval_xpath_list(dom, '//li[contains(@class, "searchresult")]'):
+
+        link = eval_xpath_getindex(result, './/div[@class="itemurl"]/a', 0, default=None)
+        if link is None:
+            continue
+
         title = result.xpath('.//div[@class="heading"]/a/text()')
-        date = dateparse(result.xpath('//div[@class="released"]/text()')[0].replace("released ", ""))
         content = result.xpath('.//div[@class="subhead"]/text()')
         new_result = {
             "url": extract_text(link),
             "title": extract_text(title),
             "content": extract_text(content),
-            "publishedDate": date,
         }
+
+        date = eval_xpath_getindex(result, '//div[@class="released"]/text()', 0, default=None)
+        if date:
+            new_result["publishedDate"] = dateparse(date.replace("released ", ""))
+
         thumbnail = result.xpath('.//div[@class="art"]/img/@src')
         if thumbnail:
             new_result['thumbnail'] = thumbnail[0]
-        if "album" in result.classes:
+
+        result_id = parse_qs(urlparse(link.get('href')).query)["search_item_id"][0]
+        itemtype = extract_text(result.xpath('.//div[@class="itemtype"]')).lower()
+        if "album" == itemtype:
             new_result["iframe_src"] = iframe_src.format(type='album', result_id=result_id)
-        elif "track" in result.classes:
+        elif "track" == itemtype:
             new_result["iframe_src"] = iframe_src.format(type='track', result_id=result_id)
 
         results.append(new_result)

searx/static/themes/simple/src/less/embedded.less

@@ -17,3 +17,13 @@ iframe[src^="https://www.mixcloud.com"] {
   // 200px, somtimes 250px.
   height: 250px;
 }
+
+iframe[src^="https://bandcamp.com/EmbeddedPlayer"] {
+  // show playlist
+  height: 350px;
+}
+
+iframe[src^="https://bandcamp.com/EmbeddedPlayer/track"] {
+  // hide playlist
+  height: 120px;
+}