Redirecting based on Requested URL

[Bocskay]

I have a small issue, hopefully easy for a proficient Python programmer.

I have an upload script that is going to be used accross multiple sites. Each site will submit a file to the script and I need the script to redirect the user to the appropriate URL based on the original request.

Currently the re-direct is hardcoded.

REDIRECT_TO_HOST="http://someurl.com"

Does anyone know how I can replace the hardcoded URL with the Requested URL?

Cheers.

PS. Sorry if it's a dumb question, I've been googling for ages and have found little help on the subject (at least not that I could understand)

[bartonc]

I have a small issue, hopefully easy for a proficient Python programmer.

I have an upload script that is going to be used accross multiple sites. Each site will submit a file to the script and I need the script to redirect the user to the appropriate URL based on the original request.

Currently the re-direct is hardcoded.

REDIRECT_TO_HOST="http://someurl.com"

Does anyone know how I can replace the hardcoded URL with the Requested URL?

Cheers.

PS. Sorry if it's a dumb question, I've been googling for ages and have found little help on the subject (at least not that I could understand)

post a code snippet or two to give us a better idea of what's going on in your script. Please refer to "Posting Guidelines" for use of CODE TAGS. Thanks,
Barton

[Bocskay]

Ok. Here goes. This is the entire script.

 
#!/usr/bin/python
 
##
## UPLOADER SCRIPT VERSION 1.3
##
## June 24 05 - MS FTP Server doenst like ,'s
## July 15 05 - Strip any leading _'s -'s or \s's
## Aug 15 05 - Added redirect on error
 
# Dont forget to point this to th right python path, it may be python23 or python24 depending
 
import datetime
import re
import sys
import os
import getopt
import errno
import mimetypes
import email
import time
import mimetools
import multifile
import StringIO
import urllib2_file
import urllib2
import urllib
import string
import sys
import getopt
import httplib, mimetypes, sys, urllib2, re, time
 
# Multipart POST -code shamelessly ripped from
# http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/146306
 
def post_multipart(h, selector, fields, files):
    """
    Post fields and files to an http host as multipart/form-data.
    fields is a sequence of (name, value) elements for regular form fields.
    files is a sequence of (name, filename, value) elements for data to be uploaded as files
    Return the server's response page.
    """
    content_type, body = encode_multipart_formdata(fields, files)
    h.putrequest('POST', selector)
    h.putheader('Content-Type', content_type)
    h.putheader('Content-Length', str(len(body)))
    h.putheader('Referer', 'Courier Upload<->Python interface')
    h.putheader('Agent', 'Express Courier Python interface')
    h.endheaders()
    h.send(body)
 
    return h.getresponse();
 
def encode_multipart_formdata(fields, files):
    """
    fields is a sequence of (name, value) elements for regular form fields.
    files is a sequence of (name, filename, value) elements for data to be uploaded as files
    Return (content_type, body) ready for httplib.HTTP instance
    """
    BOUNDARY = '----------ThIs_Is_tHe_bouNdaRY_$'
    CRLF = '\r\n'
    L = []
    for (key, value) in fields:
        L.append('--' + BOUNDARY)
        L.append('Content-Disposition: form-data; name="%s"' % key)
        L.append('')
        L.append(value)
    for (key, filename, value) in files:
        L.append('--' + BOUNDARY)
        L.append('Content-Disposition: form-data; name="%s"; filename="%s"' % (key, filename))
        L.append('Content-Type: %s' % get_content_type(filename))
        L.append('')
        L.append(value)
    L.append('--' + BOUNDARY + '--')
    L.append('')
    body = CRLF.join(L)
    content_type = 'multipart/form-data; boundary=%s' % BOUNDARY
    return content_type, body
 
def get_content_type(filename):
    return mimetypes.guess_type(filename)[0] or 'application/octet-stream'
 
 
from urllib import urlencode
 
import ConfigParser
import string
 
REDIRECT_TO_HOST="http://someurl.com"
DEST_UPLOADDIR=""
 
 
def email_error(text=''):
    import smtplib
    import email.Message
    import socket
    global REDIRECT_TO_HOST
 
    message = email.Message.Message()
    message["To"]      = "[e-mail]"
    message["From"]    = "[e-mail]"
    message["Subject"] = REDIRECT_TO_HOST + " " + os.getenv("REQUEST_URI")
 
    message.set_payload(text)
 
    # try the internal mail server
    try:
        mailServer = smtplib.SMTP("192.168.1.XXX")
    except socket.error, (ecode, reason):
        #if not, use the external one
        mailServer = smtplib.SMTP("mx.xxx.com.au")
 
    mailServer.sendmail(message["From"], message["To"], message.as_string())
    mailServer.quit()
 
 
def get_first_attachment(stream):
 
    # look for the PDF header followed by the PDF EOF marker, then a few chars later will be the mime seperator (some dashes etc)
    # thing is, often a PDF will have multiple EOF markers so we need to look for the end mime seperator so we know whats going on
 
    p=re.compile("%PDF.*%%EOF.*?$",re.DOTALL)
    m=p.search(stream)
 
    if m == None:
        email_error("Could not find PDF attachment in upload \n\n"+stream)
        return None
    else:
    start=m.start()
 
    #look for the last %%EOF
    p=re.compile("%%EOF",re.DOTALL)
    for m in re.finditer(p, stream):
    end=m.end()+1 #plus one byte to cover any \r or \n
 
    payload=stream[start:end]
 
    return payload
 
# MIME encoding on the current courier app is a piece of shit, use regex instead
def discover_filename(stream):
 
    # find the file name in the http session by looking for filename*"*"
    p=re.compile("filename=\".*\"",re.I)
    m=p.search(stream)
    if ( m != None ):
        fname= stream[m.start():m.end()]
    else:
        fname="untitled-document.pdf"
 
 
    #strip antything microsoft...word etc
    p=re.compile("microsoft.*(word|powerpoint|access|excel|office)",re.I);
    fname=p.sub("",fname)
 
    #strip leading whitespace
    p=re.compile("(filename|\"|=|\.pdf)",re.I);
    fname=p.sub("",fname)
 
    #strip leading whitespace
    p=re.compile('^\s+');
    fname=p.sub("",fname)
 
    #strip trailing whitespace
    p=re.compile('\s*$');
    fname=p.sub("",fname)
 
    # replace any non alphanumerics with an underscore
    p=re.compile("[\s\.#$%^&*,]")
    fname=p.sub("_",fname)
 
    # replace anything upto the last / or \
    p=re.compile(".*[\\\/]",re.I)
    fname=p.sub("",fname)
 
    #strip any leading wierdos
    p=re.compile("^[-_\s]")
    while p.search(fname) != None:
        fname=p.sub("",fname)
 
    return fname+".pdf"
 
 
 
if __name__ == '__main__':
 
 
 
    # read from stdin
    stdin_stream=sys.stdin.read()
    print "Content-type: text/html\n"    
 
    if stdin_stream != None:
 
    if len(stdin_stream)>1024:
        thepdf=get_first_attachment(stdin_stream)
        filename=discover_filename(stdin_stream)
 
        h = httplib.HTTPConnection(os.getenv("SERVER_NAME"), 80)
        resp = post_multipart(h, "/express/upload/courier", [('op', 'Upload file'),('edit[form_id]', 'express_upload_courier')],[('edit[upload]', filename, thepdf)])
 
        loc = resp.read()
        print loc
 
 

[bartonc]

REDIRECT_TO_HOST="http://someurl.com"

Does anyone know how I can replace the hardcoded URL with the Requested URL?

Ok, I see how your code works except where Requested URL comes from. If its in here:

    h.putrequest('POST', selector)

we'll need the format of selector.

[Bocskay]

For those interested, I've used this

REDIRECT_TO_HOST= "http://" + os.getenv("HTTP_HOST")

Thanks

[bartonc]

For those interested, I've used this

REDIRECT_TO_HOST= "http://" + os.getenv("HTTP_HOST")

Thanks

But where does the one you want come from?