147 lines
5.2 KiB
Python
147 lines
5.2 KiB
Python
#!/usr/bin/env python3
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# TODO create systemd unit file
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# TODO create systemd tmpfiles.d config
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# TODO setup ansible deployment
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# TODO setup webserver user disk quota
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import tempfile
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import uuid
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from functools import wraps
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from os import path
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import os
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import sqlite3
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from flask import Flask, url_for, redirect, session, make_response, render_template, request, send_file, abort
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from flask_wtf import FlaskForm
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from flask_wtf.file import FileField, FileRequired
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from wtforms.fields import RadioField
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from wtforms.validators import DataRequired
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from werkzeug.utils import secure_filename
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from job_queue import JobQueue
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app = Flask(__name__, static_url_path='/static')
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app.config.from_envvar('GERBOWEB_SETTINGS')
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class UploadForm(FlaskForm):
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upload_file = FileField(validators=[DataRequired()])
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class OverlayForm(UploadForm):
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upload_file = FileField(validators=[FileRequired()])
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side = RadioField('Side', choices=[('top', 'Top'), ('bottom', 'Bottom')])
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class ResetForm(FlaskForm):
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pass
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job_queue = JobQueue(app.config['JOB_QUEUE_DB'])
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def tempfile_path(namespace):
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""" Return a path for a per-session temporary file identified by the given namespace. Create the session tempfile
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dir if necessary. The application tempfile dir is controlled via the upload_path config value and not managed by
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this function. """
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if not path.isdir(app.config['UPLOAD_PATH']):
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os.mkdir(app.config['UPLOAD_PATH'])
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sess_tmp = path.join(app.config['UPLOAD_PATH'], session['session_id'])
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if not path.isdir(sess_tmp):
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os.mkdir(sess_tmp)
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return path.join(sess_tmp, namespace)
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def require_session_id(fun):
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@wraps(fun)
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def wrapper(*args, **kwargs):
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if 'session_id' not in session:
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session['session_id'] = str(uuid.uuid4())
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return fun(*args, **kwargs)
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return wrapper
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@app.route('/')
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@require_session_id
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def index():
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forms = {
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'gerber_form': UploadForm(),
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'overlay_form': OverlayForm(),
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'reset_form': ResetForm() }
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for job in ('vector_job', 'render_job'):
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if job in session and job_queue[session[job]].finished:
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del session[job]
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r = make_response(render_template('index.html',
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has_renders = path.isfile(tempfile_path('gerber.zip')),
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has_output = path.isfile(tempfile_path('overlay.png')),
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**forms))
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if 'vector_job' in session or 'render_job' in session:
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r.headers.set('refresh', '10')
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return r
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# NOTES about the gerber and overlay file upload routines
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# * The maximum upload size is limited by the MAX_CONTENT_LENGTH config setting.
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# * The uploaded files are deleted after a while by systemd tmpfiles.d
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# TODO: validate this setting applies *after* gzip transport compression
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@app.route('/upload/<namespace>', methods=['POST'])
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@require_session_id
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def upload(namespace):
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if namespace not in ('gerber', 'overlay'):
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return abort(400, 'Invalid upload type')
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upload_form = UploadForm() if namespace == 'gerber' else OverlayForm()
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if upload_form.validate_on_submit():
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f = upload_form.upload_file.data
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if namespace == 'gerber':
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f.save(tempfile_path('gerber.zip'))
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session['filename'] = secure_filename(f.filename) # Cache filename for later download
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if 'render_job' in session:
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job_queue.drop(session['render_job'])
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session['render_job'] = job_queue.enqueue('render',
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session_id=session['session_id'],
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client=request.remote_addr)
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else: # namespace == 'vector'
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f.save(tempfile_path('overlay.png'))
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# Re-vectorize if either file has changed
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if path.isfile(tempfile_path('gerber.zip')) and path.isfile(tempfile_path('overlay.png')):
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if 'vector_job' in session:
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job_queue.drop(session['vector_job'])
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session['vector_job'] = job_queue.enqueue('vector',
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client=request.remote_addr,
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session_id=session['session_id'],
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side=upload_form.side.data)
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return redirect(url_for('index'))
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@app.route('/render/preview/<side>')
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def render_preview(side):
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if not side in ('top', 'bottom'):
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return abort(400, 'side must be either "top" or "bottom"')
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return send_file(tempfile_path(f'render_{side}.small.png'))
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@app.route('/render/download/<side>')
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def render_download(side):
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if not side in ('top', 'bottom'):
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return abort(400, 'side must be either "top" or "bottom"')
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return send_file(tempfile_path(f'render_{side}.png'),
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mimetype='image/png',
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as_attachment=True,
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attachment_filename=f'{path.splitext(session["filename"])[0]}_render.png')
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@app.route('/output/download')
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def output_download():
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return send_file(tempfile_path('gerber_out.zip'),
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mimetype='application/zip',
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as_attachment=True,
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attachment_filename=f'{path.splitext(session["filename"])[0]}_with_artwork.zip')
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@app.route('/session_reset', methods=['POST'])
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@require_session_id
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def session_reset():
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if 'render_job' in session:
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session['render_job'].abort()
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if 'vector_job' in session:
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session['vector_job'].abort()
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session.clear()
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return redirect(url_for('index'))
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