Full Code of ideonate/streamlit-launchpad for AI

Repository: ideonate/streamlit-launchpad
Branch: master
Commit: e31eef0bf84d
Files: 19
Total size: 33.6 KB

Directory structure:
gitextract_q6iqrcs8/

├── .gitignore
├── CONTRIBUTING.md
├── LICENSE
├── MANIFEST.in
├── README.md
├── RELEASE.md
├── examples/
│   ├── csvfiles/
│   │   └── testboxes.csv
│   ├── fileuploader.py
│   ├── intro.py
│   └── plot_example.py
├── launchpad/
│   ├── __init__.py
│   ├── dynamicapplication.py
│   ├── handlers.py
│   ├── main.py
│   └── templates/
│       ├── error.html
│       ├── loading.html
│       └── main.html
├── requirements.txt
└── setup.py

================================================
FILE CONTENTS
================================================

================================================
FILE: .gitignore
================================================
.idea
*.iml
__pycache__
build/
dist/
*.egg-info
.vscode


================================================
FILE: CONTRIBUTING.md
================================================
Contributing to Ideonate / ContainDS Projects
=============================================

We welcome contributions to our [open source projects on Github](https://github.com/ideonate).

Issues
------

Feel free to submit issues and enhancement requests via GitHub Issues.

Please also [get in touch](https://cdsdashboards.readthedocs.io/en/stable/chapters/contact.html) with any questions or feedback, or for help in working with the software. These 
actions are valuable contributions in their own right.

Contributing
------------

In general, the projects follow the "fork and pull request" Git workflow.

 1. **Fork** the repo on GitHub
 2. **Clone** the project to your own machine
 3. **Commit** changes to your own branch
 4. **Push** your work back up to your fork
 5. Submit a **Pull request** so that we can review your changes

NB: Make sure you merge the latest from "upstream" before making a pull request!

Copyright and Licensing
-----------------------

Most Ideonate open source projects are licensed under the BSD 3-Clause License, Apache 2.0 license, or MIT license.

Contributions to the Git repos will be assumed to be on the same copyright basis as existing files in that repo.


================================================
FILE: LICENSE
================================================
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================================================
FILE: MANIFEST.in
================================================

# js
recursive-include launchpad/templates *.*

# Misc
include requirements.txt
include LICENSE
include README.md
global-exclude *.py[co]


================================================
FILE: README.md
================================================
# Streamlit Launchpad

Web launchpad to browse a folder containing multiple Streamlit applications (py files), with a central launchpad listing available apps so you can run them (if not already running) and view each in its own tab.

This is a very basic alpha version. Windows is now supported. For Windows, torando >= 6.1 is required

## Install and Run

Install using pip.

```
pip install streamlit-launchpad
```

Serves *.py as separate Streamlit applications from the folder supplied on the command line:

```
streamlit-launchpad ./examples
```

Then go to http://localhost:8888/ in your browser:

![Launchpad screenshot](screenshots/Launchpad.png)

To run on a different port use:

```
streamlit-launchpad --port 8000 ./examples
```

To provide a title (default is "Streamlit Apps"):

```
streamlit-launchpad --title="My Title" ./examples
```

## Development install

```
git clone https://github.com/ideonate/streamlit-launchpad.git
cd streamlit-launchpad

pip install -e .

streamlit-launchpad ./examples
```

To run directly in python: `python -m launchpad.main ./examples/`


================================================
FILE: RELEASE.md
================================================
- To release a new version of streamlit-launchpad on PyPI:

Update setup.py to the new version

delete dist folder

`python setup.py sdist bdist_wheel`

`twine upload dist/*`

git add and git commit

`git tag -a X.X.X -m 'comment'`

`git push`

`git push --tags`



================================================
FILE: examples/csvfiles/testboxes.csv
================================================
ID,x,y,w,h
1,0,0,10,20
2,129,66,191,103
3,0,0,0,0
4,0,0,0,0
5,50,10,780,130
6,0,0,0,0


================================================
FILE: examples/fileuploader.py
================================================
import streamlit as st
import glob
from os import path
import pandas as pd

st.markdown('# Based on subfolder path')

path_input_data = st.sidebar.text_input("Provide the name to the subfolder in which your csv files are "
                                            "stored.")
st.write("Input path:", path_input_data)

docker_search_path = path.join('.', path_input_data)

st.write("Search path:", docker_search_path)

if path_input_data:

    excel_files = glob.glob(docker_search_path + '/**/*.csv', recursive=True)

    st.write(excel_files)



st.markdown('# Now try uploading')

uploaded_file = st.file_uploader("Choose a CSV file", type="csv")

if uploaded_file is not None:

     st.write('Uploaded file: ', uploaded_file)
     data = pd.read_csv(uploaded_file)
     st.write(data)


st.write('Streamlit version: ', st.version._get_installed_streamlit_version())

================================================
FILE: examples/intro.py
================================================
import pandas
import numpy
import streamlit as st

st.title("Streamlit intro")
st.write("Examples below were taken from:  https://streamlit.io/docs/getting_started.html#get-started")


st.subheader("Here's our first attempt at using data to create a table:")

st.code("""
df = pandas.DataFrame({
    'first column': [1, 2, 3, 4],
    'second column': [10, 20, 30, 40]
})
""", language='python')
df = pandas.DataFrame({
  'first column': [1, 2, 3, 4],
  'second column': [10, 20, 30, 40]
})
# here we use 'magic', 
# any time that Streamlit sees a variable or a literal value on its own line, 
# it automatically writes that to your app using st.write()
df



st.subheader("Draw a line hart:")
st.code("""
chart_data = pandas.DataFrame(
     numpy.random.randn(20, 3),
     columns=['a', 'b', 'c'])
st.line_chart(chart_data)
""", language='python')

chart_data = pandas.DataFrame(
     numpy.random.randn(20, 3),
     columns=['a', 'b', 'c'])
st.line_chart(chart_data)


st.subheader("Let’s use Numpy to generate some sample data and plot it on a map of San Francisco:")

st.code("""
map_data = pandas.DataFrame(
    numpy.random.randn(1000, 2) / [50, 50] + [37.76, -122.4],
    columns=['lat', 'lon'])
st.map(map_data)
""", language='python')

map_data = pandas.DataFrame(
    numpy.random.randn(1000, 2) / [50, 50] + [37.76, -122.4],
    columns=['lat', 'lon'])
st.map(map_data)



st.title("Add interactivity with widgets")

st.subheader("Use checkboxes to show/hide data")

st.code("""
if st.checkbox('Show dataframe'):
    chart_data = pandas.DataFrame(
       numpy.random.randn(20, 3),
       columns=['a', 'b', 'c'])

    st.line_chart(chart_data)
""", language='python')

if st.checkbox('Show dataframe'):
    chart_data = pandas.DataFrame(
       numpy.random.randn(20, 3),
       columns=['a', 'b', 'c'])

    st.line_chart(chart_data)


st.subheader("Put widgets in a sidebar")

st.code("""
if st.checkbox('Show in sidebar'):
    option = st.sidebar.selectbox(
        'Which number do you like best?',
        ["a", "b","c"])

    'You selected:', option
""", language='python')

if st.checkbox('Show in sidebar'):
    option = st.sidebar.selectbox(
        'Which number do you like best?',
        ["a", "b","c"])

    'You selected:', option



st.subheader("Show progress")

st.code("""
import time

# Add a placeholder
latest_iteration = st.empty()
bar = st.progress(0)

for i in range(100):
  # Update the progress bar with each iteration.
  latest_iteration.text(f'Iteration {i+1}')
  bar.progress(i + 1)
  time.sleep(0.1)

'...and now we\'re done!'
""", language='python')  

import time

# Add a placeholder
latest_iteration = st.empty()
bar = st.progress(0)

for i in range(100):
  # Update the progress bar with each iteration.
  latest_iteration.text(f'Iteration {i+1}')
  bar.progress(i + 1)
  time.sleep(0.1)

'...and now we\'re done!'

================================================
FILE: examples/plot_example.py
================================================
import time
import numpy as np
import streamlit as st


st.code("""
progress_bar = st.sidebar.progress(0)
status_text = st.sidebar.empty()
last_rows = np.random.randn(1, 1)
chart = st.line_chart(last_rows)

for i in range(1, 101):
    new_rows = last_rows[-1, :] + np.random.randn(5, 1).cumsum(axis=0)
    status_text.text("%i%% Complete" % i)
    chart.add_rows(new_rows)
    progress_bar.progress(i)
    last_rows = new_rows
    time.sleep(0.05)

progress_bar.empty()

# Streamlit widgets automatically run the script from top to bottom. Since
# this button is not connected to any other logic, it just causes a plain
# rerun.
st.button("Re-run")
""", language='python')  

progress_bar = st.sidebar.progress(0)
status_text = st.sidebar.empty()
last_rows = np.random.randn(1, 1)
chart = st.line_chart(last_rows)

for i in range(1, 101):
    new_rows = last_rows[-1, :] + np.random.randn(5, 1).cumsum(axis=0)
    status_text.text("%i%% Complete" % i)
    chart.add_rows(new_rows)
    progress_bar.progress(i)
    last_rows = new_rows
    time.sleep(0.05)

progress_bar.empty()

# Streamlit widgets automatically run the script from top to bottom. Since
# this button is not connected to any other logic, it just causes a plain
# rerun.
st.button("Re-run")


================================================
FILE: launchpad/__init__.py
================================================


================================================
FILE: launchpad/dynamicapplication.py
================================================
import tornado.web


class DynamicApplication(tornado.web.Application):

    def remove_handlers(self, appname):

        remove_rules_index = -1

        for i, rule in enumerate(self.default_router.rules):
            print(rule)
            print(rule.matcher)

            if isinstance(rule.target, tornado.web.ReversibleRouter):
                print(rule.target.named_rules)
                if appname+ 'ws' in rule.target.named_rules or appname+ 'http' in rule.target.named_rules:
                    remove_rules_index = i

        if remove_rules_index >= 0:
            print("Remove rules {}".format(remove_rules_index))
            del self.default_router.rules[remove_rules_index]


================================================
FILE: launchpad/handlers.py
================================================
import tornado
import tornado.web
import tornado.websocket
import tornado.httpclient
import tornado.gen

tornado.httpclient.AsyncHTTPClient.configure(None, defaults={'decompress_response': False})

MAX_RETRIES = 100


class ProxyHandler(tornado.web.RequestHandler):
    def initialize(self, proxy_url='/', **kwargs):
        super(ProxyHandler, self).initialize(**kwargs)
        self.proxy_url = proxy_url

    async def post(self, url=None):
        return await self.handle_req(url)

    async def get(self, url=None):
        return await self.handle_req(url)

    async def handle_req(self, url=None):
        print("INCOMING URL: "+url)
        #url = url or self.proxy_url
        if url is None:
            if self.request.uri.startswith('/'):
                url = self.request.uri[1:]
            else:
                url = self.request.uri

        debug = True
        if url[:6] == 'static' or url[:7] == 'favicon':
            debug = False

        url = self.proxy_url+url

        if debug:
            print("{} : {}".format(self.request.method, url))

        incoming_headers = {}

        for k,v in self.request.headers.items():
            if not k.lower() in ['host', 'pragma', 'upgrade-insecure-requests',
                                 'sec-fetch-user', 'sec-fetch-site', 'sec-fetch-mode', 'accept-encoding']:
                # 'accept-encoding', 'accept-language', 'accept', 'cache-control',
                incoming_headers[k] = v

        body = None
        if self.request.method == 'POST':
            body = self.request.body

        req = tornado.httpclient.HTTPRequest(url, headers=incoming_headers, method=self.request.method, body=body)
        client = tornado.httpclient.AsyncHTTPClient()

        response = None
        retries = 0

        while not response and retries < MAX_RETRIES:
            response = await client.fetch(req, raise_error=False)
            if response.error:
                print(" **** response.error")
                print(response.error)
                if response.code == 599: # Maybe server wasn't yet ready
                    print(" **** response.error 599 ***")
                    response = None
                    retries += 1
                    await tornado.gen.sleep(0.1)

        if not response:
            self.set_status(404)
            self.finish()
            return

        if debug:
            print(incoming_headers)

            print(response)

            print(response.headers)

            print(response.code)

        self.set_status(response.code)
        if response.code != 200:
            self.finish()
        else:
            if response.body:
                if debug:
                    print("response body")
                for header, v in response.headers.get_all():
                    if header.lower() == 'content-length':
                        self.set_header(header, str(max(len(response.body), int(v))))
                    else:
                        self.set_header(header, v)

            self.write(response.body)

            self.finish()


class ProxyWSHandler(tornado.websocket.WebSocketHandler):
    def initialize(self, proxy_url='/', **kwargs):
        super(ProxyWSHandler, self).initialize(**kwargs)
        self.proxy_url = proxy_url
        self.ws = None
        self.closed = True

    async def open(self, url=None):
        self.closed = False
        #url = url or self.proxy_url
        if url is None:
            if self.request.uri.startswith('/'):
                url = self.request.uri[1:]
            else:
                url = self.request.uri
        url = self.proxy_url+url

        def write(msg):
            if self.closed or msg is None:
                if self.ws:
                    self.ws.close()
                    self.ws = None
            else:
                if self.ws:
                    self.write_message(msg, binary=isinstance(msg, bytes))

        if url[:4] == 'http':
            url = 'ws' + url[4:]

        print("WEBSOCKET OPENING ON "+url)
        self.ws = await tornado.websocket.websocket_connect(url,
                                                            on_message_callback=write)

    async def on_message(self, message):
        if self.ws:
            await self.ws.write_message(message, binary=isinstance(message, bytes))

    def on_close(self):
        if self.ws:
            self.ws.close()
            self.ws = None
            self.closed = True


================================================
FILE: launchpad/main.py
================================================
import tornado.ioloop
import tornado.web
import tornado.template
import os, signal, platform
import tornado.process
import subprocess
import threading
import re
import click
from collections import namedtuple
from .dynamicapplication import DynamicApplication
from .handlers import ProxyWSHandler, ProxyHandler

AppInfo = namedtuple('AppInfo', 'name url')

# py file name to port number
proxymap = {}

port = 8500

template_loader = tornado.template.Loader(os.path.join(os.path.dirname(os.path.realpath(__file__)),"templates"))

scan_folder_path = '../examples'


def popenAndCall(onExit, *popenArgs, **popenKWArgs):
    """
    Runs a subprocess.Popen, and then calls the function onExit when the
    subprocess completes. This replicates the tornado.process.Suprocess for Windows
    This code from:
    https://stackoverflow.com/questions/2581817/python-subprocess-callback-when-cmd-exits

    Use it exactly the way you'd normally use subprocess.Popen, except include a
    callable to execute as the first argument. onExit is a callable object, and
    *popenArgs and **popenKWArgs are simply passed up to subprocess.Popen.
    """
    def runInThread(onExit, popenArgs, popenKWArgs):
        proc = subprocess.Popen(*popenArgs, **popenKWArgs)
        proc.wait()
        onExit()
        return

    thread = threading.Thread(target=runInThread,
                              args=(onExit, popenArgs, popenKWArgs))
    thread.start()
    return thread # returns immediately after the thread starts


class MainHandler(tornado.web.RequestHandler):
    def get(self):
        apps = []
        for f in os.scandir(scan_folder_path):
            if f.name[-3:] == '.py':
                apps.append(AppInfo(name=f.name, url="/{}/".format(f.name)))

        self.write(template_loader.load('main.html').generate(apps=apps, cwd=scan_folder_path, title=page_title))
        self.finish()


class DefaultProxyHandler(tornado.web.RequestHandler):

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        print("INIT PROXYHANDLER ***")

    async def get(self):
        match = re.search(r"^/(.+\.py)/(.*)$", self.request.path)
        appname, path = None, None
        if match:
            appname, path = match[1], match[2]
            print(match)

        else:
            print("NO MATCH: "+self.request.path)
            self.set_status(404)
            self.finish()
            return

        print("appname {}, path {}".format(appname, path))

        global proxymap
        my_port = 0
        if not appname in proxymap:

            global port

            def exit_callback(*args, **kwargs):
                print("exit callback {} {}".format(args, kwargs))
                self.application.remove_handlers(appname)
                proxymap[appname]['stopped'] = True

                proc = proxymap[appname]['proc']
                if proc:
                    if proc.stderr:
                        proxymap[appname]['stderr'] = proc.stderr
                    if proc.stdout:
                        proxymap[appname]['stdout'] = proc.stdout

            if platform.system() == "Windows":  # tornado.process.Subprocess does not work on Windows
                proc = popenAndCall(exit_callback, ['streamlit', 'run', os.path.join(scan_folder_path, appname),
                                                    '--server.port', str(port),
                                                    '--server.headless', 'true',
                                                    '--server.runOnSave', 'true',
                                                    '--server.enableCORS', 'false',
                                                    '--server.enableXsrfProtection', 'false'],
                                                   cwd=scan_folder_path)
            else:  # for Linux use standard tornado.process.Subprocess
                proc = tornado.process.Subprocess(['streamlit', 'run', os.path.join(scan_folder_path, appname),
                                                   '--server.port', str(port),
                                                   '--server.headless', 'true',
                                                   '--server.runOnSave', 'true',
                                                   '--server.enableCORS', 'false',
                                                   '--server.enableXsrfProtection', 'false'],
                                                  stdout=tornado.process.Subprocess.STREAM, stderr=tornado.process.Subprocess.STREAM,
                                                  cwd=scan_folder_path)

                proc.set_exit_callback(exit_callback)

            proxymap[appname] = {'proc': proc, 'port': port, 'stopped': False, 'stdout': None, 'stderr': None}

            url = 'http://localhost:{}/'.format(port)

            self.application.add_handlers(
                r".*",
                [
                    (rf"^/{appname}/stream(.*)", ProxyWSHandler, {'proxy_url': url + 'stream'}, appname + 'ws'),
                    (rf"^/{appname}/(.*)", ProxyHandler, {'proxy_url': url}, appname + 'http')
                ])

            print("Started {}: {}".format(appname, port))

            my_port = port

            port += 1
        else:
            # We should only reach this point if remove_handlers was called on the app's underlying handlers,
            # so most likely the server has stopped
            my_port = proxymap[appname]['port']
            print("Already running {}: {}".format(appname, my_port))

            async def empty_and_close_stream(stream):
                if stream:
                    lines = await stream.read_until_close()
                    stream.close()
                    return lines
                return None

            stdout = await empty_and_close_stream(proxymap[appname]['stdout'])
            stderr = await empty_and_close_stream(proxymap[appname]['stderr'])

            del proxymap[appname]

            self.write(template_loader.load('error.html').generate(app=AppInfo(name=appname, url="/{}/".format(appname)),
                                                                   stdout=stdout, stderr=stderr, port=my_port))

            self.finish()
            return

        self.write(template_loader.load('loading.html').generate(app=AppInfo(name=appname, url="/{}/".format(appname)),
                                                                 port=my_port))

        self.finish()


def make_app():
    return DynamicApplication([
        (r"^/$", MainHandler),
    ],
    debug=True,
    default_handler_class=DefaultProxyHandler)


@click.command()
@click.option('--port', default=8888, help='port for the launchpad server')
@click.option('--title', default="Streamlit Apps", help='title for the streamlit web page')
@click.argument('folder')
def run(port, title, folder):
    global scan_folder_path, page_title
    scan_folder_path = os.path.abspath(folder)
    page_title = title
    app = make_app()

    async def shutdown():
        tornado.ioloop.IOLoop.current().stop()

        for (appname, appval) in proxymap.items():
            if not appval['stopped']:
                proc = appval['proc']
                if proc:
                    print('Stopping proc for app {}'.format(appname))
                    proc.proc.terminate()

    def exit_handler(sig, frame):
        tornado.ioloop.IOLoop.current().add_callback_from_signal(shutdown)

    signal.signal(signal.SIGTERM, exit_handler)
    signal.signal(signal.SIGINT,  exit_handler)

    app.listen(port)
    print("Starting streamlit launchpad server of folder {} on port {}".format(scan_folder_path, port))
    tornado.ioloop.IOLoop.current().start()


if __name__ == '__main__':
    run()


================================================
FILE: launchpad/templates/error.html
================================================
<html>
<head>
    <title>Streamlit Launchpad - app status</title>
</head>
<body>

<h2>Streamlit App Status</h2>
<p>Status of <a href="{{ app.url }}" target="_slaunch_{{ escape(app.name) }}">{{ escape(app.name) }}</a> on port {{ port }}.</p>

<p>App appears to have stopped. Removing so you can refresh your browser to try again.</p>

{% if stderr %}
<pre>
{{ escape(stderr) }}
</pre>
{% end %}

{% if stdout %}
<pre>
{{ escape(stdout) }}
</pre>
{% end %}


</body>
</html>


================================================
FILE: launchpad/templates/loading.html
================================================
<html>
<meta http-equiv="refresh" content="1" />

<head>
    <title>Streamlit Launchpad - app status</title>
</head>
<body>

<p>Starting app {{ escape(app.name) }} on port {{ port }}.</p>

<p>Will reload automatically in 1 sec. Click <a href="#" onclick="javascript:window.location.reload()">here</a> to reload manually.</p>

</body>
</html>


================================================
FILE: launchpad/templates/main.html
================================================
<html>
<head>
    <title>Streamlit Launchpad</title>
</head>
<body>

<h2>{{title}}</h2>
<p>Reading from {{ cwd }}</p>

<ul>
    {% for app in sorted(apps) %}
    {% block appitem %}
    <li><a href="{{ app.url }}" target="_slaunch_{{ escape(app.name) }}">{{ escape(app.name) }}</a></li>
    {% end %}
    {% end %}
</ul>
</body>
</html>


================================================
FILE: requirements.txt
================================================
streamlit>=0.62.0
tornado>=5.0
Click>=7.0


================================================
FILE: setup.py
================================================
import setuptools


with open("README.md", "r") as fh:
    long_description = fh.read()

# read requirements.txt
with open('requirements.txt', 'r') as f:
    content = f.read()
li_req = content.split('\n')
install_requires = [e.strip() for e in li_req if len(e)]

setuptools.setup(
    name="streamlit-launchpad",
    version="0.0.11",
    author="Dan Lester",
    author_email="dan@ideonate.com",
    description="Web launchpad to browse a folder containing multiple Streamlit applications",
    long_description=long_description,
    long_description_content_type="text/markdown",
    url="https://github.com/ideonate/streamlit-launchpad",
    packages=setuptools.find_packages(),
    install_requires=install_requires,
    include_package_data=True,
    zip_safe=False,
    entry_points={"console_scripts": ["streamlit-launchpad = launchpad.main:run"]},
    classifiers=[
        "Programming Language :: Python :: 3",
        "License :: OSI Approved :: MIT License",
        "Operating System :: OS Independent",
    ],
    python_requires='>=3.6',
)