def render(self, header = 1):
# start out with the default renderer
BlosxomRenderer.render(self, header)
pyhttp = self.request.getHttp()
useGzip = False
if self.config.get('useGzip',False):
if pyhttp.has_key('HTTP_ACCEPT_ENCODING'):
# encodings = pyhttp['HTTP_ACCEPT_ENCODING'].split(",")
# if "gzip" in encodings:
if pyhttp['HTTP_ACCEPT_ENCODING'].find("gzip") != -1:
useGzip = True
self.addHeader("content-encoding","gzip")
# if this flavour is not supposed to have XSLT translation run on it
# then we just output the buffer as it is. Ideally, this statement
# should never be true anymore, but just in case, this is a failsafe
if self.data['flavour'] not in self.config.get('xsltFlavours',[]):
self._outputBuffer = self._compressBuffer(useGzip)
self._out.write('\n'.join(['%s: %s' % (x, self._header[x])
for x in self._header.keys()]))
self._out.write('\n\n')
self._out.write(self._outputBuffer)
return
# check to see if the browser is an XSLT browser
userAgent = pyhttp['HTTP_USER_AGENT']
flavorREs = self.config.get('xsltBrowsers',[])
# if the browser can render XSLT natively, as indicated by the
# xsltBrowsers config option, then we don't need to rerender it
for x in flavorREs:
matchobj = re.search(x,userAgent)
if matchobj:
self._outputBuffer = self._compressBuffer(useGzip)
self._out.write('\n'.join(['%s: %s' % (x, self._header[x])
for x in self._header.keys()]))
self._out.write('\n\n')
self._out.write(self._outputBuffer)
return
#
# otherwise do the XSLT transform
#
# find the sheet
# eventually this will also be automated, where it digs in the XML, but
# that is not the case now. Instead it looks in the dict from the
# configuration file
xsltSheetDict = self.config.get('xsltSheets',{})
if xsltSheetDict.has_key(self.data['flavour']):
xsltSheet = xsltSheetDict[self.data['flavour']]
else:
# FIXME: some error processing would go here
xsltSheet = "/NOFILEFOUND"
xsltEngine = self.config.get('xsltEngine','xsltproc')
xsltEngineParams = self.config.get('xsltEngineParams',{})
content = None
# try to use libxslt if it's requested
if (self.config.get('xsltEngine','') == 'libxslt'):
# try:
# this is needed to render without shelling out
import libxml2
import libxslt
doc = libxml2.parseDoc(self._outputBuffer)
# this attempts to find the xml-stylesheet tag in the document
# if it can find it, then it overwrites the original stylesheet request
ss = None
rootNode = doc.children
while ss == None and rootNode != None:
if rootNode.name == 'xml-stylesheet':
matchObj = re.match('.*href="([^"]*)"',rootNode.content)
if matchObj:
ss = matchObj.groups()[0]
if self.config.get('serverBase',None):
xsltSheet = self.config.get('serverBase','')+os.sep+ss
else:
rootNode = rootNode.get_next()
styledoc = libxml2.parseFile(xsltSheet)
style = libxslt.parseStylesheetDoc(styledoc)
result = style.applyStylesheet(doc,xsltEngineParams)
content = style.saveResultToString(result)
# try to figure out the content type based on the XSLT method parameter
contentMapping = self.config.get('xsltContentMapping',{})
outputMethod = style.method()
if contentMapping.has_key(outputMethod):
self.addHeader('Content-type', contentMapping[outputMethod])
else:
self.addHeader('Content-type', "text/html")
# style.freeStylesheet()
# doc.freeDoc()
# result.freeDoc()
# except:
# pass
# if xsltproc is requested or the page hasn't been rendered yet, do this
if (self.config.get('xsltEngine','') == 'xsltproc' or content == None):
# store the output buffer to a temp file
tf = tempfile.mktemp(".xml")
f = open(tf,"w")
f.write(self._outputBuffer)
f.close()
xsltEngineParamsString = " ".join(["--param %s %s" % (mem, xsltEngineParams[mem])
for mem in xsltEngineParams])
f = open(tempfile.mktemp(".txt"),"w")
f.write("""%s %s %s %s""" % (xsltEngine, xsltEngineParamsString, xsltSheet, tf))
f.close()
childStdout, childStdin, childStderr = popen2.popen3("""%s %s %s %s""" % (xsltEngine, xsltEngineParamsString, xsltSheet, tf))
childStdin.close()
content = ""
while 1:
line = childStdout.readline()
if not line: break
content = content + line
# os.unlink(tf)
childStdout.close()
childStderr.close()
self.addHeader('Content-type', 'text/html')
# in theory this should also be validated too...it's conceivable that
# there might be different output methods than just text/html, for
# instance, someone may do a transform to SVG for a certain flavour
self._outputBuffer = content.decode('utf-8')
self._outputBuffer = self._compressBuffer(useGzip)
self._out.write('\n'.join(['%s: %s' % (x, self._header[x])
for x in self._header.keys()]))
self._out.write('\n\n')
self._out.write(self._outputBuffer)
def __init__(self, request, stdoutput = sys.stdout):
BlosxomRenderer.__init__(self, request, stdoutput)
self.request = request
self.data = self.request.getData()
self.config = self.request.getConfiguration()
self._outputBuffer = ""
