def _renderMathTexvc(latex,
output_path,
output_mode='png',
resolution_in_dpi=120):
"""only render mode is png"""
if not texvc_available:
return None
cmd = [
'texvc', output_path, output_path,
latex.encode('utf-8'), "UTF-8",
str(resolution_in_dpi)
]
try:
sub = Popen(cmd, stdout=PIPE, stdin=PIPE, stderr=PIPE)
except OSError:
log.error('error with texvc. cmd:', repr(' '.join(cmd)))
return None
(result, error) = sub.communicate()
del sub
if output_mode == 'png':
if len(result) >= 32:
png_fn = os.path.join(output_path, result[1:33] + '.png')
if os.path.exists(png_fn):
return png_fn
log.error('error converting math (texvc). source: %r \nerror: %r' %
(latex, result))
return None
def dispatch(self, request):
try:
command = request.params['command']
except KeyError:
log.error("no command given")
return Response(body="no command given", status=400)
try:
method = getattr(self, 'do_%s' % command)
except AttributeError:
log.error("no such command: %r" %(command, ))
return Response(body="no such command: %r" % (command, ), status=400)
collection_id = request.params.get('collection_id')
if not collection_id:
collection_id = self.new_collection(request.params)
is_new = True
else:
is_new = False
if not self.check_collection_id(collection_id):
return Response(status=404)
lock = FileLock(self.get_collection_dir(collection_id))
lock.acquire()
try:
return method(collection_id, request.params, is_new)
except Exception, exc:
self.send_report_mail('exception', command=command)
return self.error_response('error executing command %r: %s' % (
command, exc,))
def _renderMathBlahtex(latex, output_path, output_mode):
if not blahtexml_available:
return None
cmd = ['blahtexml', '--texvc-compatible-commands']
if output_mode == 'mathml':
cmd.append('--mathml')
elif output_mode == 'png':
cmd.append('--png')
else:
return None
if output_path:
try: # for some reason os.getcwd failed at some point. this should be investigated...
curdir = os.getcwd()
except:
curdir = None
os.chdir(output_path)
latex = latex.lstrip()
if not latex:
return None
try:
sub = Popen(cmd, stdout=PIPE, stdin=PIPE, stderr=PIPE)
except OSError:
log.error('error with blahtexml. cmd:', repr(' '.join(cmd)))
if curdir:
os.chdir(curdir)
return None
(result, error) = sub.communicate(latex.encode('utf-8'))
del sub
if curdir is not None:
os.chdir(curdir)
if result:
p = ET.fromstring(result)
if output_mode == 'png':
r = p.getiterator('png')
if r:
png_fn = r[0].findtext('md5')
if png_fn:
png_fn = os.path.join(output_path, png_fn + '.png')
if os.path.exists(png_fn):
return png_fn
elif output_mode == 'mathml':
mathml = p.getiterator('mathml')
if mathml:
mathml = mathml[0]
mathml.set("xmlns", "http://www.w3.org/1998/Math/MathML")
return mathml
log.error('error converting math (blahtexml). source: %r \nerror: %r' %
(latex, result))
return None
def _renderMathBlahtex(latex, output_path, output_mode):
if not blahtexml_available:
return None
cmd = ['blahtexml', '--texvc-compatible-commands']
if output_mode == 'mathml':
cmd.append('--mathml')
elif output_mode == 'png':
cmd.append('--png')
else:
return None
if output_path:
try: # for some reason os.getcwd failed at some point. this should be investigated...
curdir = os.getcwd()
except:
curdir = None
os.chdir(output_path)
latex = latex.strip()
if not latex:
return None
try:
sub = Popen(cmd, stdout=PIPE, stdin=PIPE, stderr=PIPE)
except OSError:
log.error('error with blahtexml. cmd:', repr(' '.join(cmd)))
if curdir:
os.chdir(curdir)
return None
(result, error) = sub.communicate(latex.encode('utf-8'))
del sub
if curdir is not None:
os.chdir(curdir)
if result:
p = ET.fromstring(result)
if output_mode == 'png':
r = p.getiterator('png')
if r:
png_fn = r[0].findtext('md5')
if png_fn:
png_fn = os.path.join(output_path, png_fn + '.png')
if os.path.exists(png_fn):
return png_fn
elif output_mode == 'mathml':
mathml = p.getiterator('mathml')
if mathml:
mathml = mathml[0]
mathml.set("xmlns","http://www.w3.org/1998/Math/MathML")
return mathml
log.error('error converting math (blahtexml). source: %r \nerror: %r' % (latex, result))
return None
def renderMath(latex,
output_path=None,
output_mode='png',
render_engine='blahtexml',
resolution_in_dpi=120):
"""
@param latex: LaTeX code
@type latex: unicode
@param output_mode: one of the values 'png' or 'mathml'. mathml only works
with blahtexml as render_engine
@type output_mode: str
@param render_engine: one of the value 'blahtexml' or 'texvc'
@type render_engine: str
@returns: either path to generated png or mathml string
@rtype: basestring
"""
if not latex:
return
assert output_mode in ("png", "mathml")
assert render_engine in ("texvc", "blahtexml")
assert isinstance(latex, unicode), 'latex must be of type unicode'
if output_mode == 'png' and not output_path:
log.error(
'math rendering with output_mode png requires an output_path')
raise Exception("output path required")
removeTmpDir = False
if output_mode == 'mathml' and not output_path:
output_path = tempfile.mkdtemp()
removeTmpDir = True
output_path = os.path.abspath(output_path)
result = None
if render_engine == 'blahtexml':
result = _renderMathBlahtex(latex,
output_path=output_path,
output_mode=output_mode)
if result is None and output_mode == 'png':
result = _renderMathTexvc(latex,
output_path=output_path,
output_mode=output_mode,
resolution_in_dpi=resolution_in_dpi)
if removeTmpDir:
shutil.rmtree(output_path)
return result
def dispatch(self, request):
try:
command = request.params['command']
except KeyError:
log.error("no command given")
raise HTTPResponse("no command given", status=400)
try:
method = getattr(self, 'do_%s' % command)
except AttributeError:
log.error("no such command: %r" % (command, ))
raise HTTPResponse("no such command: %r" % (command, ), status=400)
collection_id = request.params.get('collection_id')
if not collection_id:
collection_id = self.new_collection(request.params)
is_new = True
else:
is_new = False
if not self.check_collection_id(collection_id):
raise HTTPResponse(status=404)
try:
qserve = collid2qserve[collection_id]
except KeyError:
qserve = choose_idle_qserve()
if qserve is None:
return self.error_response(
"system overloaded. please try again later.", queue_full=1)
collid2qserve[collection_id] = qserve
self.qserve = rpcclient.serverproxy(host=qserve[0], port=qserve[1])
try:
return method(collection_id, request.params, is_new)
except Exception, exc:
print "ERROR while dispatching %r: %s" % (
command,
dict(collection_id=collection_id, is_new=is_new,
qserve=qserve))
traceback.print_exc()
if command == "download":
raise exc
return self.error_response('error executing command %r: %s' % (
command,
exc,
))
def dispatch(self, request):
try:
command = request.params['command']
except KeyError:
log.error("no command given")
raise HTTPResponse("no command given", status=400)
try:
method = getattr(self, 'do_%s' % command)
except AttributeError:
log.error("no such command: %r" % (command, ))
raise HTTPResponse("no such command: %r" % (command, ), status=400)
collection_id = request.params.get('collection_id')
if not collection_id:
collection_id = self.new_collection(request.params)
is_new = True
else:
is_new = False
if not self.check_collection_id(collection_id):
raise HTTPResponse(status=404)
try:
qserve = collid2qserve[collection_id]
except KeyError:
qserve = choose_idle_qserve()
if qserve is None:
return self.error_response(
"system overloaded. please try again later.", queue_full=1)
collid2qserve[collection_id] = qserve
self.qserve = rpcclient.serverproxy(host=qserve[0], port=qserve[1])
try:
return method(collection_id, request.params, is_new)
except Exception as exc:
print "ERROR while dispatching %r: %s" % (command, dict(
collection_id=collection_id, is_new=is_new, qserve=qserve))
traceback.print_exc()
if command == "download":
raise exc
return self.error_response('error executing command %r: %s' % (
command, exc,))
def renderMath(latex, output_path=None, output_mode='png',
render_engine='blahtexml', resolution_in_dpi=120):
"""
@param latex: LaTeX code
@type latex: unicode
@param output_mode: one of the values 'png' or 'mathml'. mathml only works
with blahtexml as render_engine
@type output_mode: str
@param render_engine: one of the value 'blahtexml' or 'texvc'
@type render_engine: str
@returns: either path to generated png or mathml string
@rtype: basestring
"""
if not latex:
return
assert output_mode in ("png", "mathml")
assert render_engine in ("texvc", "blahtexml")
assert isinstance(latex, unicode), 'latex must be of type unicode'
if output_mode == 'png' and not output_path:
log.error('math rendering with output_mode png requires an output_path')
raise Exception("output path required")
removeTmpDir = False
if output_mode == 'mathml' and not output_path:
output_path = tempfile.mkdtemp()
removeTmpDir = True
output_path = os.path.abspath(output_path)
result = None
if render_engine == 'blahtexml':
result = _renderMathBlahtex(latex, output_path=output_path, output_mode=output_mode)
if result is None and output_mode == 'png':
result = _renderMathTexvc(latex, output_path=output_path,
output_mode=output_mode, resolution_in_dpi=resolution_in_dpi)
if removeTmpDir:
shutil.rmtree(output_path)
return result
def _renderMathTexvc(latex, output_path, output_mode='png'):
"""only render mode is png"""
if not texvc_available:
return None
cmd = ['texvc', output_path, output_path, latex.encode('utf-8')]
try:
sub = Popen(cmd, stdout=PIPE, stdin=PIPE, stderr=PIPE)
except OSError:
log.error('error with texvc. cmd:', repr(' '.join(cmd)))
return None
(result, error) = sub.communicate()
del sub
if output_mode == 'png':
if len(result) >= 32:
png_fn = os.path.join(output_path, result[1:33] + '.png')
if os.path.exists(png_fn):
return png_fn
log.error('error converting math (texvc). source: %r \nerror: %r' % (latex, result))
return None
