Servlet Objects
def processContent(self,content):
self._content.append(content)
self._contentLength = self._contentLength + len(content) if self._contentLength >= self.contentLength():
self._environ["REQUEST_METHOD"] = self.requestMethod() self._content = string.join(self._content,"") self._content = self._content[:self.contentLength()] fp = StringIO.StringIO(self._content)
try:
form = cgi.FieldStorage(headers=self._headers, \ environ=self._environ,keep_blank_values=1,fp=fp)
self.processForm(form)
except:
netsvc.logException()
self.shutdown()
def processForm(self,form): self.sendResponse(501)
Member functions which a HTTP servlet may find useful here are "contentLength()" and "con- tentType()". The "contentLength()" member function returns an integer value correspond- ing to that defined by the HTTP content length header, or
A HTTP servlet may also interrogate arbitrary headers using the member functions "contains- Header()" and "header()". These respectively indicate if a header exists and return its value. The name of a header should always be given as a lower case string. All headers may be obtained as a Py- thon dictionary using "headers()".
If a HTTP servlet encounters an internal error at any time, it may call the "shutdown()" member function to abort all processing of the request. This will cause the connection to the HTTP client to be closed immediately, discarding any data which hadn’t yet been sent. The instance of the HTTP servlet will then subsequently be destroyed.
The Form Servlet
As processing of form data will be a common situation, an implementation of a form servlet is provid- ed. This is called FormServlet. The implementation of this servlet is similar to the previous exam- ple except that it does additional processing to translate data from the types used by the FieldStorage class into standard Python lists and dictionaries. The name of the member function which you need to override to process the form is "handleRequest()".
class LoginServlet(netsvc.FormServlet): def handleRequest(self):
if self.containsField("user") and \ self.containsField("password"):
user = self.field("user")
