Create a webpage to demonstrate C code - html

Question

I have a C code which takes a file as input, processes it and gives a number as output. I want to build a html webpage which takes the file path as input, gives it to the C code. C code processes it and output(integer) is displayed in browser. Can you please suggest me how to go about this? Are there are any prebuilt softwares to do this?

Answer 1

If C code is used to produce a command line utility then you could call it while generating a web page:
#!/usr/bin/env python
import subprocess
from bottle import request, route, run, template # http://bottlepy.org/
command = ['wc', '-c'] # <-- XXX put your command here
#route('/')
def index():
filename = request.query.filename or 'default' # query: /?filename=<filename>
output = subprocess.check_output(command + [filename]) # run the command
return template("""<dl>
<dt>Input</dt>
<dd>{{filename}}</dd>
<dt>Output</dt>
<dd>{{output}}</dd></dl>""", filename=filename, output=output)
run(host='localhost', port=8080)
Run this script or paste it into a Python console, then open your browser and pass a filename (a path on the server) as a query parameter:
$ python -mwebbrowser http://localhost:8080/?filename=/etc/passwd
wc -c prints number of bytes for each input file. It is executed on the server.
If C code is available as a library; you could use ctypes module to call a C function from Python e.g., to call printf() C function from libc library:
#!/usr/bin/env python
import ctypes
from ctypes.util import find_library
try:
libc = ctypes.cdll.msvcrt # Windows
except OSError:
libc = ctypes.cdll.LoadLibrary(find_library('c'))
n = libc.printf("abc ")
libc.printf("%d", n)