How to invoke webbrowser from cgi script?

My cgi script is as follows on a Linux system with Firefox and Chrome browsers: Assume that it is a PDF file only. I need to display image files also in a browser. Not able to trace the bug.

#! /usr/bin/env python
###################################################
# File should be searched on server and displayed
# in the browser
###################################################
import cgi
import cgitb
cgitb.enable()
import StringIO
import sys
import os,glob
import subprocess
import webbrowser

def check_file_extension(display_file):
     input_file = display_file
     nm,file_extension = os.path.splitext(display_file)
     return file_extension

print "Content-type: text/htmln"
responseStr = "<html> %s </html>"
print "<pre>"

form = cgi.FieldStorage()
webbrowser.open_new_tab("file:///home/Documents/postgresql.pdf")       

file_nm = ''
nm =''
path = '/home/Documents'
not_found = 0

if form.has_key("file1"):
     file_nm = form["file1"].value

for f in next(os.walk(path))[2]:
     if str(f) == str(file_nm).strip():
         not_found = 0
         print 'Found file: ' + f
         type_of_file = check_file_extension(f) #TODO: Based on extension, change  content type headers for display
         absolute_path_of_file = os.path.join(path, f)
         file_url = 'file://'+absolute_path_of_file
         print '<a href='+file_url+'>'+ absolute_path_of_file+'</a>'
         try:
            pdf1 = open(absolute_path_of_file,'rb').read()
            print "Content-type: application/pdfn"
            print pdf1 
            break
         except Exception,e:
            print e 
     else:
         not_found = 1

if not_found == 1:
     print "%s" % str(file_nm) + " not found"

print "%s" % file_nm
print "</pre>"

JavaScript
​x
 
#! /usr/bin/env python#################################################### File should be searched on server and displayed# in the browser###################################################import cgiimport cgitbcgitb.enable()import StringIOimport sysimport os,globimport subprocessimport webbrowser​def check_file_extension(display_file):     input_file = display_file     nm,file_extension = os.path.splitext(display_file)     return file_extension​print "Content-type: text/htmln"responseStr = "<html> %s </html>"print "<pre>"​form = cgi.FieldStorage()webbrowser.open_new_tab("file:///home/Documents/postgresql.pdf")       ​file_nm = ''nm =''path = '/home/Documents'not_found = 0​if form.has_key("file1"):     file_nm = form["file1"].value​for f in next(os.walk(path))[2]:     if str(f) == str(file_nm).strip():         not_found = 0         print 'Found file: ' + f         type_of_file = check_file_extension(f) #TODO: Based on extension, change  content type headers for display         absolute_path_of_file = os.path.join(path, f)         file_url = 'file://'+absolute_path_of_file         print '<a href='+file_url+'>'+ absolute_path_of_file+'</a>'         try:            pdf1 = open(absolute_path_of_file,'rb').read()            print "Content-type: application/pdfn"            print pdf1             break         except Exception,e:            print e      else:         not_found = 1​if not_found == 1:     print "%s" % str(file_nm) + " not found"​print "%s" % file_nmprint "</pre>"​

Answer

I edited my code to work this way:

#! /usr/bin/env python

import os
import cgi
import cgitb 
cgitb.enable()
import sys

def check_file_extension(display_file):
    input_file = display_file
    nm,file_extension = os.path.splitext(display_file)
    return file_extension

form = cgi.FieldStorage()

type_of_file =''
file_nm = ''
nm =''
path = '/home/shantala/Documents'
not_found = 0

if form.has_key("file1"):
    file_nm = form["file1"].value

for f in next(os.walk(path))[2]:
    if str(f) == str(file_nm).strip():
        not_found = 0
        absolute_path_of_file = os.path.join(path, f)
        type_of_file = check_file_extension(absolute_path_of_file)
        if type_of_file == '.pdf':
            file_read = file(absolute_path_of_file,'rb').read()
            print  'Content-type: application/pdfn'
            print file_read
        if type_of_file == '.txt':
            file_read = file(absolute_path_of_file,'rb').read()
            print  'Content-type: text/htmln'
            print file_read
        if type_of_file == '.png':
            file_read = file(absolute_path_of_file,'rb').read()
            print  'Content-type: image/pngn'
            print file_read
        if type_of_file == '.pdf':
            file_read = file(absolute_path_of_file,'rb').read()
            print  'Content-type: application/pdfn'
            print file_read
        if type_of_file == '.JPG':
            file_read = file(absolute_path_of_file,'rb').read()
            print  'Content-type: image/jpgn'
            print file_read
        if type_of_file == '.bmp':
            file_read = file(absolute_path_of_file,'rb').read()
            print  'Content-type: image/bmpn'
            print file_read

        break
    else:
        not_found = 1

if not_found == 1:
    pass
    # print "%s" % str(file_nm) + " not found"

JavaScript
 
#! /usr/bin/env python​import osimport cgiimport cgitb cgitb.enable()import sys​def check_file_extension(display_file):    input_file = display_file    nm,file_extension = os.path.splitext(display_file)    return file_extension​form = cgi.FieldStorage()​type_of_file =''file_nm = ''nm =''path = '/home/shantala/Documents'not_found = 0​if form.has_key("file1"):    file_nm = form["file1"].value​for f in next(os.walk(path))[2]:    if str(f) == str(file_nm).strip():        not_found = 0        absolute_path_of_file = os.path.join(path, f)        type_of_file = check_file_extension(absolute_path_of_file)        if type_of_file == '.pdf':            file_read = file(absolute_path_of_file,'rb').read()            print  'Content-type: application/pdfn'            print file_read        if type_of_file == '.txt':            file_read = file(absolute_path_of_file,'rb').read()            print  'Content-type: text/htmln'            print file_read        if type_of_file == '.png':            file_read = file(absolute_path_of_file,'rb').read()            print  'Content-type: image/pngn'            print file_read        if type_of_file == '.pdf':            file_read = file(absolute_path_of_file,'rb').read()            print  'Content-type: application/pdfn'            print file_read        if type_of_file == '.JPG':            file_read = file(absolute_path_of_file,'rb').read()            print  'Content-type: image/jpgn'            print file_read        if type_of_file == '.bmp':            file_read = file(absolute_path_of_file,'rb').read()            print  'Content-type: image/bmpn'            print file_read​        break    else:        not_found = 1​if not_found == 1:    pass    # print "%s" % str(file_nm) + " not found"​

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Answer