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Davide Alberani 2019-08-14 22:19:44 +02:00
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conf/*.json
conf/*.db
.DS_Store
node_modules/
__pycache__
storage/*
npm-debug*.log
ssl/*.pem
*.py[cod]
*.so
.editorconfig

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# HTTPrint
A very simple web interface to upload and print files.
## Install and run
To install it:
``` bash
wget https://bootstrap.pypa.io/get-pip.py
sudo python3 get-pip.py
# if you want to install these modules for an unprivileged user, add --user and remove "sudo";
# if you want to upgrade the versions already present in the system, also add --upgrade
sudo pip3 install tornado
git clone https://github.com/alberanid/httprint
cd httprint
./httprint.py --debug
```
Now you can **point your browser to [http://localhost:7777/](http://localhost:7777/)**
You can also **run the server in https**, putting in the *ssl* directory two files named *httprint_key.pem* and *httprint_cert.pem*
# License and copyright
Copyright 2019 Davide Alberani <da@mimante.net>
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
<link rel="stylesheet" type="text/css" href="/static/css/iziToast.min.css">
<script src="/static/js/iziToast.min.js"></script>
<script src="/static/js/httprint.js"></script>
<title>HTTPrint</title>
</head>
<body>
<h1>Upload a file to print</h1>
<input id="upload-file" type="file" />
<button onClick="uploadFile();">print</button>
</body>
</html>

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function uploadFile() {
let photo = document.getElementById("upload-file").files[0];
let formData = new FormData();
formData.append("file", photo);
var uploadFile = document.getElementById('upload-file');
fetch("/api/upload", {method: "POST", body: formData})
.then(function(response) {
return response.json();
})
.then(function(reply) {
if (reply && !reply.error) {
iziToast.success({
title: "DONE!",
message: "file sent to printer",
position: 'topCenter',
layout: 2
});
} else {
iziToast.error({
title: "ERROR!",
message: reply.message,
position: 'topCenter',
layout: 2
});
}
uploadFile.value = null;
})
.catch(function(err) {
iziToast.error({
title: "ERROR!",
message: "failed to send file",
position: 'topCenter',
layout: 2
});
uploadFile.value = null;
});
}

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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""httprint - print files via web
Copyright 2019 Davide Alberani <da@mimante.net>
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
"""
import os
import time
import random
import asyncio
import logging
import subprocess
import multiprocessing as mp
from tornado.ioloop import IOLoop
import tornado.httpserver
import tornado.options
from tornado.options import define, options
import tornado.web
from tornado import gen, escape
API_VERSION = '1.0'
UPLOAD_PATH = 'uploads'
PRINT_CMD = ['lp']
PROCESS_TIMEOUT = 60
ENCODING = 'utf-8'
logger = logging.getLogger()
logger.setLevel(logging.INFO)
class HTTPrintBaseException(Exception):
"""Base class for httprint custom exceptions.
:param message: text message
:type message: str
:param status: numeric http status code
:type status: int"""
def __init__(self, message, status=400):
super(HTTPrintBaseException, self).__init__(message)
self.message = message
self.status = status
class BaseHandler(tornado.web.RequestHandler):
"""Base class for request handlers."""
# A property to access the first value of each argument.
arguments = property(lambda self: dict([(k, v[0].decode('utf-8'))
for k, v in self.request.arguments.items()]))
@property
def clean_body(self):
"""Return a clean dictionary from a JSON body, suitable for a query on MongoDB.
:returns: a clean copy of the body arguments
:rtype: dict"""
return escape.json_decode(self.request.body or '{}')
def write_error(self, status_code, **kwargs):
"""Default error handler."""
if isinstance(kwargs.get('exc_info', (None, None))[1], HTTPrintBaseException):
exc = kwargs['exc_info'][1]
status_code = exc.status
message = exc.message
else:
message = 'internal error'
self.build_error(message, status=status_code)
def initialize(self, **kwargs):
"""Add every passed (key, value) as attributes of the instance."""
for key, value in kwargs.items():
setattr(self, key, value)
def build_error(self, message='', status=400):
"""Build and write an error message.
:param message: textual message
:type message: str
:param status: HTTP status code
:type status: int
"""
self.set_status(status)
self.write({'error': True, 'message': message})
def build_success(self, message='', status=200):
"""Build and write a success message.
:param message: textual message
:type message: str
:param status: HTTP status code
:type status: int
"""
self.set_status(status)
self.write({'error': False, 'message': message})
def _run(self, cmd):
p = subprocess.Popen(cmd, close_fds=True)
p.communicate()
def run_subprocess(self, cmd):
"""Execute the given action.
:param cmd: the command to be run with its command line arguments
:type cmd: list
"""
p = mp.Process(target=self._run, args=(cmd,))
p.start()
class UploadHandler(BaseHandler):
"""Reset schedules handler."""
@gen.coroutine
def post(self):
if not self.request.files.get('file'):
self.build_error("no file uploaded")
return
fileinfo = self.request.files['file'][0]
webFname = fileinfo['filename']
extension = ''
try:
extension = os.path.splitext(webFname)[1]
except Exception:
pass
if not os.path.isdir(UPLOAD_PATH):
os.makedirs(UPLOAD_PATH)
fname = '%s-%s%s' % (
time.strftime('%Y%m%d%H%M%S'),
'%04d' % random.randint(0, 9999),
extension)
pname = os.path.join(UPLOAD_PATH, fname)
try:
with open(pname, 'wb') as fd:
fd.write(fileinfo['body'])
except Exception as e:
self.build_error("error writing file %s: %s" % (pname, e))
return
try:
with open(pname + '.info', 'w') as fd:
fd.write('originale file name: %s\n' % webFname)
except Exception:
pass
cmd = PRINT_CMD + [pname]
self.run_subprocess(cmd)
self.build_success("file sent to printer")
class TemplateHandler(BaseHandler):
"""Handler for the template files in the / path."""
@gen.coroutine
def get(self, *args, **kwargs):
"""Get a template file."""
page = 'index.html'
if args and args[0]:
page = args[0].strip('/')
arguments = self.arguments
self.render(page, **arguments)
def serve():
"""Read configuration and start the server."""
define('port', default=7777, help='run on the given port', type=int)
define('address', default='', help='bind the server at the given address', type=str)
define('ssl_cert', default=os.path.join(os.path.dirname(__file__), 'ssl', 'httprint_cert.pem'),
help='specify the SSL certificate to use for secure connections')
define('ssl_key', default=os.path.join(os.path.dirname(__file__), 'ssl', 'httprint_key.pem'),
help='specify the SSL private key to use for secure connections')
define('debug', default=False, help='run in debug mode', type=bool)
tornado.options.parse_command_line()
if options.debug:
logger.setLevel(logging.DEBUG)
ssl_options = {}
if os.path.isfile(options.ssl_key) and os.path.isfile(options.ssl_cert):
ssl_options = dict(certfile=options.ssl_cert, keyfile=options.ssl_key)
init_params = dict(listen_port=options.port, logger=logger, ssl_options=ssl_options)
_upload_path = r'upload/?'
application = tornado.web.Application([
(r'/api/%s' % _upload_path, UploadHandler, init_params),
(r'/api/v%s/%s' % (API_VERSION, _upload_path), UploadHandler, init_params),
(r'/?(.*)', TemplateHandler, init_params),
],
static_path=os.path.join(os.path.dirname(__file__), 'dist/static'),
template_path=os.path.join(os.path.dirname(__file__), 'dist/'),
debug=options.debug)
http_server = tornado.httpserver.HTTPServer(application, ssl_options=ssl_options or None)
logger.info('Start serving on %s://%s:%d', 'https' if ssl_options else 'http',
options.address if options.address else '127.0.0.1',
options.port)
http_server.listen(options.port, options.address)
try:
IOLoop.instance().start()
except (KeyboardInterrupt, SystemExit):
pass
if __name__ == '__main__':
serve()

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