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BibUtils/CgiWrapper


From http://raymondyee.net/projects/bibutils/
Run Bibutils to convert among bibliographic formats.

(Bibutils is written by Chris Putnam. This little wrapper is by Raymond Yee. )

Note: This is a demo and is potentially buggy. Bugs are very likely the fault of Raymond Yee.
Send comments to yee AT berkeley.edu

URL of input file:
format of input:
convert to:
mimetype of output (e.g., "text/plain", "application/xml", "application/x-endnote-refer"):
(ideally, the output should automatically determine the mimetype, but I wanted the flexibility of setting the mimetype manually for now)

Run this code in the same directory as the Linux BibUtils executables.

Code

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#!/usr/bin/python2.4
#!c:\Python23\python.exe


class convertError(Exception):
    pass

# inputs:  searchTerms, count, startIndex, format
# ignore startPage

def getArgs(form):

    if form.has_key('from'):
        fromValue = form['from'].value
    else:
        raise convertError('No from')

    if form.has_key('to'):
        toValue = form['to'].value
    else:
        raise convertError('No to')

    if form.has_key('url'):
        url = form['url'].value
    else:
        raise convertError('No url')

    if form.has_key('mimetype'):
        mimetype = form['mimetype'].value
    else:
        mimetype = 'text/plain'


    return (fromValue, toValue,url,mimetype)


def convert(fromValue, toValue,url,mimetype):
    import os, urllib, tempfile, time
    #binDir = r'C:\utils\bibutils'
    binDir = '/home/yee/web/raymondyee.net/projects/bibutils'
    # can this conversion be done?  does it require one or two steps?

    # first, convert the input file to xml, unless the input is already xml    

    #execFile1 = binDir + '\%s2%s.exe' % (fromValue,'xml')
    #execFile2 = binDir + '\%s2%s.exe' % ('xml',toValue)
    execFile1 = binDir + '/%s2%s' % (fromValue,'xml')
    execFile2 = binDir + '/%s2%s' % ('xml',toValue)


    if ((fromValue == 'xml') and os.path.exists(execFile2)) or (os.path.exists(execFile1) and os.path.exists(execFile2)) or \
       ((toValue == 'xml') and os.path.exists(execFile1)):

        # read the file from the url
        h = urllib.urlopen(url)
        s = h.read()
        h.close()

        # make the temporary directory    
        fd = tempfile.mkdtemp()
        xmlfname = fd + '/xml_' + str(int(time.time()))

        # step1 input -> xml (if necessary)

        if fromValue == 'xml':
            f = open(xmlfname, 'w')
            f.write(s)
            f.close()
        else:
            fname = fd + '/input_' + str(int(time.time()))
            f = open(fname, 'w')
            f.write(s)
            f.close()

        # step1 input -> xml (if necessary)
        # now run conversion1
            commandLine1 = "%s %s" % (execFile1,fname)
            outputHandle = os.popen(commandLine1)
            output = outputHandle.read()
            outputHandle.close()
            os.remove(fname)
            f = open(xmlfname, 'w')
            f.write(output)
            f.close()

        # step2 xml -> output (if necessary)

        if toValue == 'xml':  # just return what is the xml file
            f = open(xmlfname)
            output = f.read()
            f.close()
        else:
            commandLine2 = "%s %s" % (execFile2,xmlfname)
            outputHandle = os.popen(commandLine2)
            output = outputHandle.read()
            outputHandle.close()

            os.remove(xmlfname)    # get rid of temp file and tempdir
            os.rmdir(fd)

        return output
    else:
        raise convertError('requested conversion not possible')



def do_cgi():
    import cgi
    form = cgi.FieldStorage()
    import sys
    sys.stderr = sys.stdout

    try:
        try:
            (fromValue, toValue,url,mimetype) = getArgs(form)
        except Exception, e:
            print "Content-type: text/html\n"
            print "<html><body>%s</body></html>" % (str(e))
            raise convertError('exception thrown by getArgs')
        #(fromValue, toValue,url,mimetype)=('bib','xml','http://raymondyee.net/wiki/BibTex_2fSampleFile1?action=raw&mimetype=text/plain','application/xml')
        print "Content-type: %s\n" % (mimetype)
        print convert(fromValue, toValue,url,mimetype)
    except convertError, e:
        print "Content-type: text/html\n"
        print "<html><body>%s</body></html>" % (str(e))


def main():
    (fromValue, toValue,url,mimetype)=('bib','end','http://raymondyee.net/wiki/BibTex_2fSampleFile1?action=raw&mimetype=text/plain','application/xml')
    print convert(fromValue, toValue,url,mimetype)


if __name__ == '__main__':
    do_cgi()
    #main()
else:
    try:
      do_cgi()
    except Exception, e:
      print "Content-type: text/html\n"
      print "<html><body>Error: %s</body></html>" % (str(e))