creation of a new web worker fails if the script is in a VFS and is set using the `src` attribute
Opened this issue · 0 comments
moepnse commented
Hello,
the creation of a new web worker fails if the script is in a VFS and is set using the src attribute.
If I change the following line from:
s.src = file
to
s.innerText = open(file, "r").read()
then at least the web worker can be started.
If the line worker_script_path = "py/elephas/web_workers/formatter.py" is changed to worker_script_path = "formatter0.py", then the worker works as desired. In contrast to formatter.py, formatter0.py is not Base64 encoded and is not located in the VFS. However, both are identical in terms of functionality.
Thanks in advance for your help!
Error:
Traceback (most recent call last):
File "brython_issue_20240917_1.html#webworker", line 105, in onload
self._workers.append(WWPoolWorker(wid, self))
^^^^^^^^^^^^^^^^^^^^^^^
File "brython_issue_20240622.html#webworker", line 52, in __init__
worker.create_worker(wid, self.onready, self.onmessage, self.onerror)
RuntimeError: No webworker with id 'webworker_26abd947_63b6_4d46_9e26_ee13fd35c4ef'brython_issue_20240917_1.html
<!DOCTYPE html>
<html>
<head>
<!-- Required meta tags-->
<meta charset="utf-8">
<title>Brython - Issue Demo 20240917</title>
<!-- Brython -->
<script src="https://raw.githack.com/brython-dev/brython/master/www/src/brython.js"></script>
<script src="https://raw.githack.com/brython-dev/brython/master/www/src/brython_stdlib.js"></script>
<!-- <script type="text/python" class="webworker" id="formatter" src="formatter.py"></script>-->
<script src="stermi.vfs.js"></script>
<script type="text/python" id="webworker">
import uuid
from browser import document, console, worker, window
class WebWorker:
_busy: bool = False
_rdy: bool = False
_msgs: list = None
_w = None
def __init__(self, src):
self._msgs = []
s = document.createElement("script")
s.setAttribute("type", "text/python")
s.className = "webworker"
s.id = "webworker_" + uuid.uuid4()
document.head.appendChild(s)
worker.create_worker(s.id, self.onready, self.onmessage, self.onerror)
def onready(self, worker):
self._w = worker
self._rdy = True
if len(self._msgs) > 0:
for msg in self._msgs:
self._w.send(msg)
def send(self, msg):
self._busy = True
if not self._rdy:
console.debug("worker not yet ready...")
self._msgs.append(msg)
else:
console.debug("sending message to worker...")
self._w.send(msg)
def onmessage(self, evt):
pass
def onerror(self, evt):
pass
class WWPoolWorker(WebWorker):
def __init__(self, wid, pool_leader):
self._pool_leader = pool_leader
self._msgs = []
self._id = wid
element = document.getElementById(wid)
console.debug("element:", element)
src = element.src
console.debug("src:", src)
console.debug("creating new worker...")
worker.create_worker(wid, self.onready, self.onmessage, self.onerror)
def onmessage(self, evt):
self._busy = False
self._pool_leader.onmessage(self, self._rid, evt)
def send(self, msg, rid):
console.debug("new message:", msg, rid)
self._busy = True
self._rid = rid
self._w.send(msg)
def onready(self, worker):
super().onready(worker)
self._pool_leader.send_pending_msgs()
def onerror(self, error_msg):
super().onready(worker)
console.error(self._id, error_msg)
class WWPool:
_msgs: list = None
_promises: dict = None
def __init__(self, src=None, file=None, wid=None, worker_count=5):
self._msgs = []
self._promises = {}
self._workers = []
if wid is not None:
self._id = wid
for i in range(worker_count):
console.debug(f"starting new pool worker {wid}...")
self._workers.append(WWPoolWorker(wid, self))
elif file is not None or src is not None:
s = document.createElement("script")
s.className = "webworker"
new_uuid = str(uuid.uuid4()).replace("-", "_")
wid = s.id = "webworker_" + new_uuid
s.setAttribute("type", "text/python")
"""
def observe(records, obs):
if records[0].addedNodes[0].id == wid:
for i in range(worker_count):
console.debug("starting new pool worker...")
self._workers.append(WWPoolWorker(wid, self))
observer.disconnect()
observer = window.MutationObserver.new(observe)
observer.observe(document.body, {'childList': True})
"""
def onload(ev):
console.debug("web worker onload:", ev)
for i in range(worker_count):
console.debug(f"starting new pool worker {wid}...")
self._workers.append(WWPoolWorker(wid, self))
s.removeEventListener("load", onload)
s.addEventListener("load", onload)
if src is not None:
console.debug(f"setting src of worker {wid}...")
s.innerText = src
elif file is not None:
# does currently not work, see #2215 for more informations
console.debug(f"setting target script of worker {wid} to {file}...")
s.src = file
#s.innerText = open(file, "r").read()
#document.body.appendChild(s)
document <= s
else:
pass
#if wid is not None:
# for i in range(worker_count):
# console.debug("starting new pool worker...")
# self._workers.append(WWPoolWorker(wid, self))
def send(self, msg):
new_uuid = str(uuid.uuid4())
def promise_func(resolve, reject):
console.debug("new promise:", new_uuid)
self._promises[new_uuid] = resolve
for worker in self._workers:
if not worker._busy and worker._rdy:
console.debug(f"sending message {new_uuid} to worker:", worker)
worker.send(msg, new_uuid)
break
else:
console.debug(f"no worker available! adding message {new_uuid} to queue...")
self._msgs.append((new_uuid, msg))
new_promise = window.Promise.new(promise_func)
return new_promise
def send_pending_msgs(self):
console.debug("pending messages:", len(self._msgs), self._msgs)
for worker in self._workers:
if len(self._msgs) == 0:
console.debug("message queue is empty! aborting...")
return
if not worker._busy and worker._rdy:
new_uuid, msg = self._msgs.pop(0)
console.debug(f"sending pending message {new_uuid} to worker:", worker)
worker.send(msg, new_uuid)
def onmessage(self, woker, rid, evt):
console.debug("received message from worker:", rid, evt, evt.data)
console.debug("promises:", self._promises)
promise = self._promises[rid]
console.debug("promise:", promise)
promise(evt.data)
del self._promises[rid]
self.send_pending_msgs()
</script>
<script type="text/python" id="formatter_lib">
# Standard library imports.
import os
from browser import console, window
import webworker as ww
# Related third party imports.
# Local application/library specific imports.
console.debug("creating webworker pool...")
worker_script_path = "py/elephas/web_workers/formatter.py"
#worker_script_path = "formatter0.py"
with open(worker_script_path) as fh:
console.debug(fh.read())
wwpool = ww.WWPool(file=worker_script_path)
console.debug("Done!")
def ww_format(string, **data):
console.debug("formatting string:", string, data)
formatted_str = wwpool.send([string, data])
console.debug("promise:", formatted_str)
return formatted_str
</script>
</head>
<body onload="brython({debug: 2});">
<script type="text/python">
import json
import formatter_lib
from browser import console, aio, document
async def format():
mapping = json.loads(document["mapping"].value)
ta_in = document["in"]
ta_out = document["out"]
ta_out.value = await formatter_lib.ww_format(ta_in.value, **mapping)
def btn_format_click(evt):
aio.run(format())
document["btn_format"].addEventListener("click", btn_format_click)
def btn_ww_info_click(evt):
console.debug(formatter_lib.wwpool._msgs)
for worker in formatter_lib.wwpool._workers:
console.debug(worker._rdy, worker._busy)
document["btn_ww_info"].addEventListener("click", btn_ww_info_click)
</script>
<textarea id="mapping">{"test": "test123"}</textarea>
<textarea id="in">test %test% \%test\%</textarea>
<textarea id="out"></textarea>
<div id="container"></div>
<button id="btn_format">Format</button>
<button id="btn_ww_info">WW Info</button>
</body>
</html>stermi.vfs.js
__BRYTHON__.use_VFS = true;
__BRYTHON__.add_files({
"py/elephas/web_workers/formatter.py": {
"content": "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\n",
"ctime": 1726502204.3286872,
"mtime": 1719139986.8821394
}
});formatter0.py
#!/usr/bin/env python3
# Standard library imports.
from collections import deque
#from browser.webworker import current_worker, Message
from sys import argv
from os import environ
import html
# In web workers, "window" is replaced by "self".
from browser import bind, self, console
import json
# Related third party imports.
# Local application/library specific imports.
#from stermi import formatter
console.debug("started format web worker")
def format(string: str, data):
start_tokens: list=["%", "{"]
end_tokens: list=["%", "}"]
stack = deque([], 2)
start_tokens_chars: str = "".join(start_tokens)
end_tokens_chars: str = "".join(end_tokens)
start_token_found: bool = False
end_token_found: bool = False
var_name: str = ""
allowed_chars: str = "abcdefghijklmnopqrstuvwxyz1234567890_"
last_char: str = ""
start_token: str = ""
end_token: str = ""
new_string: str = ""
for c in string:
if (not start_token_found and c in start_tokens_chars) or (start_token_found and c in end_tokens_chars) and last_char != "\\":
stack.append(c)
else:
stack.append(" ")
token = "".join(stack)
if start_token_found:
for t in (c, token):
if t in end_tokens:
if start_tokens.index(start_token) == end_tokens.index(t):
end_token = t
value = data.get(var_name, f"{start_token}{var_name}{end_token}")
if isinstance(value, (list, dict)):
value = json.dumps(value)
else:
value = str(value)
new_string += html.escape(value)
start_token_found = False
end_token_found = True
var_name = ""
break
else:
print("end token does not match start token!")
start_token_found = False
new_string += start_token + var_name + c
var_name = ""
else:
if c in end_tokens_chars:
last_char = c
continue
if c in allowed_chars:
var_name += c
continue
else:
start_token_found = False
print(f"{c} is not allowed inside placeholder")
new_string += start_token + var_name + c
var_name = ""
continue
if end_token_found:
last_char = c
end_token_found = False
continue
if not start_token_found:
for t in (c, token):
if t in start_tokens:
start_token_found = True
start_token = t
break
if c not in start_tokens_chars and not (start_token_found and c in end_tokens_chars) or last_char == "\\":
new_string += c
last_char = c
return new_string
def format_web(string: str, data):
start_token_found: bool = False
var_name: str = ""
allowed_chars: str = "abcdefghijklmnopqrstuvwxyz1234567890_"
last_char: str = ""
start_token: str = "%"
end_token: str = "%"
new_string: str = ""
for c in string:
if start_token_found:
if c == end_token:
value = data.get(var_name, f"{start_token}{var_name}{end_token}")
if isinstance(value, (list, dict)):
value = json.dumps(value)
else:
value = str(value)
new_string += html.escape(value)
start_token_found = False
var_name = ""
last_char = c
continue
else:
if c in allowed_chars:
var_name += c
continue
else:
start_token_found = False
print(f"{c} is not allowed inside placeholder")
new_string += start_token + var_name + c
var_name = ""
continue
else:
if last_char != "\\" and c == start_token:
start_token_found = True
last_char = c
continue
if c != start_token and not (start_token_found and c == end_token) or last_char == "\\":
new_string += c
last_char = c
return new_string
@bind(self, "message")
def message(evt):
"""Handle a message sent by the main script.
evt.data is the message body.
"""
console.debug("new message received")
#self.send(format(**evt.data))
self.send(format_web(evt.data[0], evt.data[1]))