Dear Jeff Anderson,
Thank you for your email.
It sounds very interesting to me. I must confess that I am not a
programmer, and have no experience with Django. But I have a project
in hand to do such a work.
Have you ever tried to use feedback.py to fire off another Python
script (external script)? The external script may run for 2 - 3
minutes.
Perhaps you can show me how to use feedback.py to fire off a zip.py.
Your assistance will be deeply appreciated.
Sincerely,
David
2008/11/21 Jeff Anderson <[EMAIL PROTECTED]>:
> Shao wrote:
>> Dear ALL,
>>
>> I am very much interested in using a HTML to fire off a data
>> processing script to run over the internet.
>>
>> I will be very grateful if you can advise me on passing parameters
>> from an HTML form to a script and fire the script off to carry out
>> full execution, monitor its progress and return an innerHTML with link
>> (a name string of) the file generated back to allow user to download
>> the result.
>>
>> The script run over a period of 2 to 3 minutes.
>>
> I designed a system to do something similar, but never implemented it fully.
>
> Basically, a Django view would fire off a Python thread that would run
> the script, and report its progress. I chose to use a Django model that
> the Python thread would store its progress in. The progress was
> monitored by the end user via AJAX. It queried the progress of the job
> once a second or so until it was completed. I only implemented a proof
> of concept, where the script would only count to 100. Unfortunately, I
> didn't save the code. The project I was doing it for was scrapped. The
> proof of concept code was fairly easy to implement. I think it'd fit
> your bill.
>
> If you aren't familiar with AJAX, I suggest reading a tutorial about how
> AJAX works, and then consider using an AJAX library.
>
> Hopefully this gives you a good starting point.
>
>
> Jeff Anderson
>
>
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Title: Shao Shi - call AJAX
Sending a Form with Ajax
#!/usr/bin/python
import cgi, os, sys, string
def gush(data):
print "Content-type: text/html\n"
print "<h3>Thanks, %(name)s!</h3>" % vars(data)
print "Our customer's comments are always appreciated."
print "They drive our business directions, as well as"
print "help us with our karma."
print "<p>Thanks again for the feedback!<p>"
print "And feel free to enter more comments if you wish."
print "<p>"+10*" "+"--Joe."
def whimper(data):
print "Content-type: text/html\n"
print "<h3>Sorry, %(name)s!</h3>" % vars(data)
print "We're very sorry to read that you had a complaint"
print "regarding our product__We'll read your comments"
print "carefully and will be in touch with you."
print "<p>Nevertheless, thanks for the feedback.<p>"
print "<p>"+10*" "+"--Joe."
def bail():
print "Content-type: text/html\n"
print "<H3>Error filling out form</H3>"
print "Please fill in all the fields in the form.<P>"
print '<a href="http://localhost/comment.html";>'
print 'Go back to the form</a>'
sys.exit()
class FormData:
""" A repository for information gleaned from a CGI form """
def __init__(self, form):
for fieldname in self.fieldnames:
if not form.has_key(fieldname) or form[fieldname].value == "":
bail()
else:
setattr(self, fieldname, form[fieldname].value)
class FeedbackData(FormData):
""" A FormData generated by the comment.html form. """
fieldnames = ('name', 'address', 'email', 'type', 'text')
def __repr__(self):
return "%(type)s from %(name)s on %(time)s" % vars(self)
DIRECTORY = '/home/brooks/public_html/cgi-bin/feedbackDir'
if __name__ == '__main__':
sys.stderr = sys.stdout
form = cgi.FieldStorage()
data = FeedbackData(form)
if data.type == 'comment':
gush(data)
else:
whimper(data)
#**********************************************************************
# Description:
# Zips the contents of a folder.
# Parameters:
# 0 - Input folder.
# 1 - Output zip file. It is assumed that the user added the .zip
# extension.
#**********************************************************************
# Import modules and create the geoprocessor
#
import sys, zipfile, arcgisscripting, os, traceback
gp = arcgisscripting.create()
# Function for zipping files. If keep is true, the folder, along with
# all its contents, will be written to the zip file. If false, only
# the contents of the input folder will be written to the zip file -
# the input folder name will not appear in the zip file.
#
def zipws(path, zip, keep):
path = os.path.normpath(path)
# os.walk visits every subdirectory, returning a 3-tuple
# of directory name, subdirectories in it, and filenames
# in it.
#
for (dirpath, dirnames, filenames) in os.walk(path):
# Iterate over every filename
#
for file in filenames:
# Ignore .lock files
#
if not file.endswith('.lock'):
gp.AddMessage("Adding %s..." % os.path.join(path, dirpath,
file))
try:
if keep:
zip.write(os.path.join(dirpath, file),
os.path.join(os.path.basename(path),
os.path.join(dirpath, file)[len(path)+len(os.sep):]))
else:
zip.write(os.path.join(dirpath, file),
os.path.join(dirpath[len(path):], file))
except Exception, e:
gp.AddWarning(" Error adding %s: %s" % (file, e))
return None
if __name__ == '__main__':
try:
# Get the tool parameter values
#
infolder = gp.GetParameterAsText(0)
outfile = gp.GetParameterAsText(1)
# Create the zip file for writing compressed data. In some rare
# instances, the ZIP_DEFLATED constant may be unavailable and
# the ZIP_STORED constant is used instead. When ZIP_STORED is
# used, the zip file does not contain compressed data, resulting
# in large zip files.
#
try:
zip = zipfile.ZipFile(outfile, 'w', zipfile.ZIP_DEFLATED)
zipws(infolder, zip, True)
zip.close()
except RuntimeError:
# Delete zip file if exists
#
if os.path.exists(outfile):
os.unlink(outfile)
zip = zipfile.ZipFile(outfile, 'w', zipfile.ZIP_STORED)
zipws(infolder, zip, True)
zip.close()
gp.AddWarning(" Unable to compress zip file contents.")
gp.AddMessage("Zip file created successfully")
except:
# Return any python specific errors as well as any errors from the
geoprocessor
#
tb = sys.exc_info()[2]
tbinfo = traceback.format_tb(tb)[0]
pymsg = "PYTHON ERRORS:\nTraceback Info:\n" + tbinfo + "\nError Info:\n
" + str(sys.exc_type)+ ": " + str(sys.exc_value) + "\n"
gp.AddError(pymsg)
msgs = "GP ERRORS:\n" + gp.GetMessages(2) + "\n"
gp.AddError(msgs)
#**********************************************************************
# Description:
# Zips the contents of a folder.
# Parameters:
# 0 - Input folder.
# 1 - Output zip file. It is assumed that the user added the .zip
# extension.
#**********************************************************************
# Import modules and create the geoprocessor
#
import sys, zipfile, arcgisscripting, os, traceback
gp = arcgisscripting.create()
# Function for zipping files. If keep is true, the folder, along with
# all its contents, will be written to the zip file. If false, only
# the contents of the input folder will be written to the zip file -
# the input folder name will not appear in the zip file.
#
def zipws(path, zip, keep):
path = os.path.normpath(path)
# os.walk visits every subdirectory, returning a 3-tuple
# of directory name, subdirectories in it, and filenames
# in it.
#
for (dirpath, dirnames, filenames) in os.walk(path):
# Iterate over every filename
#
for file in filenames:
# Ignore .lock files
#
if not file.endswith('.lock'):
gp.AddMessage("Adding %s..." % os.path.join(path, dirpath,
file))
try:
if keep:
zip.write(os.path.join(dirpath, file),
os.path.join(os.path.basename(path),
os.path.join(dirpath, file)[len(path)+len(os.sep):]))
else:
zip.write(os.path.join(dirpath, file),
os.path.join(dirpath[len(path):], file))
except Exception, e:
gp.AddWarning(" Error adding %s: %s" % (file, e))
return None
if __name__ == '__main__':
try:
# Get the tool parameter values
#
infolder = gp.GetParameterAsText(0)
outfile = gp.GetParameterAsText(1)
# Create the zip file for writing compressed data. In some rare
# instances, the ZIP_DEFLATED constant may be unavailable and
# the ZIP_STORED constant is used instead. When ZIP_STORED is
# used, the zip file does not contain compressed data, resulting
# in large zip files.
#
try:
zip = zipfile.ZipFile(outfile, 'w', zipfile.ZIP_DEFLATED)
zipws(infolder, zip, True)
zip.close()
except RuntimeError:
# Delete zip file if exists
#
if os.path.exists(outfile):
os.unlink(outfile)
zip = zipfile.ZipFile(outfile, 'w', zipfile.ZIP_STORED)
zipws(infolder, zip, True)
zip.close()
gp.AddWarning(" Unable to compress zip file contents.")
gp.AddMessage("Zip file created successfully")
except:
# Return any python specific errors as well as any errors from the
geoprocessor
#
tb = sys.exc_info()[2]
tbinfo = traceback.format_tb(tb)[0]
pymsg = "PYTHON ERRORS:\nTraceback Info:\n" + tbinfo + "\nError Info:\n
" + str(sys.exc_type)+ ": " + str(sys.exc_value) + "\n"
gp.AddError(pymsg)
msgs = "GP ERRORS:\n" + gp.GetMessages(2) + "\n"
gp.AddError(msgs)
