Fix #2691 DOI with < and >

Author: fnielsen

scholia/app/templates/404-doi.html

@@ -7,7 +7,7 @@
 <script>
 const Cite = require('citation-js').Cite
 try {
-  let example = new Cite('https://doi.org/{{ doi }}', { forceType: '@doi/api' })
+  let example = new Cite('https://doi.org/{{ doi | urlencode }}', { forceType: '@doi/api' })
   let output = example.format('quickstatements')
   $( '#qs' ).text( output );
   output = encodeURIComponent(

scholia/app/views.py

@@ -97,7 +97,8 @@ def register_converter(state):
 qs_pattern = r'<regex(r"Q[1-9]\d*(?:[^0-9]+Q[1-9]\d*)*"):qs>'
 
 # https://www.crossref.org/blog/dois-and-matching-regular-expressions/
-DOI_PATTERN = re.compile(r'10\.\d{4,9}/[\[\]\-._;()/:A-Z0-9]+', re.IGNORECASE)
+DOI_PATTERN = re.compile(r'10\.\d{4,9}/[\[\]\-._;()/:A-Z0-9<>]+',
+                         re.IGNORECASE)
 
 # pattern for aspects
 ASPECT_PATTERN = '<regex("[a-zA-Z]+"):aspect>'
@@ -1242,8 +1243,7 @@ def redirect_doi(doi):
         DOI identifier.
 
     """
-    normalize_doi = remove_special_characters_url(doi)
-    qs = doi_to_qs(normalize_doi)
+    qs = doi_to_qs(doi)
     if len(qs) > 0:
         q = qs[0]
         return redirect(url_for('app.show_work', q=q), code=302)

scholia/query.py

@@ -376,6 +376,10 @@ def doi_to_qs(doi):
     >>> doi_to_qs('10.1016/j.stem.2016.02.016') == ['Q23008981']
     True
 
+    >>> doi = '10.1002/1521-3951(200209)233:1<10::aid-pssb10>3.0.co;2-v'
+    >>> doi_to_qs(doi) == ['Q135403558']
+    True
+
     """
     query = 'select ?work where {{ ?work wdt:P356 "{doi}" }}'.format(
         doi=escape_string(doi.upper()))