Function for automatic find of arxiv id

README.md

@@ -114,6 +114,7 @@ A list of ideas and TODO. Don't hesitate to give feedback on the ones you really
 50. Webserver interface
 60. Categories
 70. Edit an entry instead of deleting it and adding it again
+80. Automatic download of new arXiv version
 
 ## Issues ?
 

fetcher.py

@@ -79,7 +79,7 @@ def findISBN(src):
 
 
 def isbn2Bib(isbn):
-    """Try to get bibtex entry from an ISBN number"""
+    """Tries to get bibtex entry from an ISBN number"""
     try:
         # Default merges results from worldcat.org and google books
         return isbntools.dev.fmt.fmtbib('bibtex',
@@ -158,7 +158,7 @@ def findDOI(src):
 
 
 def doi2Bib(doi):
-    """Return a bibTeX string of metadata for a given DOI.
+    """Returns a bibTeX string of metadata for a given DOI.
 
     From : https://gist.github.com/jrsmith3/5513926
     """
@@ -175,3 +175,54 @@ def doi2Bib(doi):
         tools.warning('Unable to contact remote server to get the bibtex ' +
                       'entry for doi '+doi)
         return ''
+
+
+arXiv_re = re.compile(r'arXiv:\s*([\w\.\/\-]+)')
+arXiv_wo_v_re = re.compile(r'v\d+\Z')
+
+
+def findArXivId(src):
+    """Search for a valid arXiv id in src.
+
+    Returns the arXiv id or False if not found or an error occurred.
+    From : https://github.com/minad/bibsync/blob/3fdf121016f6187a2fffc66a73cd33b45a20e55d/lib/bibsync/utils.rb
+    """
+    if src.endswith(".pdf"):
+        totext = subprocess.Popen(["pdftotext", src, "-"],
+                                  stdout=subprocess.PIPE,
+                                  stderr=subprocess.PIPE)
+    elif src.endswith(".djvu"):
+        totext = subprocess.Popen(["djvutxt", src],
+                                  stdout=subprocess.PIPE,
+                                  stderr=subprocess.PIPE)
+
+    while totext.poll() is None:
+        extractfull = totext.stdin.readline()
+        extractID = arXiv_re.search(extractfull)
+        if extractID:
+            totext.terminate()
+            break
+
+    err = totext.communicate()[1]
+    if totext.returncode > 0:
+        # Error happened
+        tools.warning(err)
+        return False
+
+    cleanID = False
+    if extractID:
+        cleanID = arXiv_wo_v_re.sub('', extractID.group(1))
+    return cleanID
+
+
+
+def arXiv2Bib(arxiv):
+    """Returns bibTeX string of metadata for a given arXiv id
+
+    arxiv is an arxiv id
+    From : https://github.com/minad/bibsync/blob/master/lib/bibsync/actions/synchronize_metadata.rb
+    """
+    arxiv = "oai:arXiv.org:"+arxiv
+    bibtex = ''
+
+    return bibtex