Question

我正在研究启动python程序，流输出并停止它的UI。它运行一个python子进程并将参数传递给它。我使用烧瓶，HTML来做到这一点。

python程序的输出显示在我的控制台上。但是，我想将其流式传输到网页文本框。我使用"{{ rows }}"从stream方法和Response中获取值，但是它不起作用。任何人都可以指出如何将其发布到网页上。

Landingpage.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Landing Page</title>
</head>
<body>
    <form method="POST" name="models_selectors" id="models_selectors" action="/">

        </form>
        <h3>Models</h3><select id="down_models" name="down_models">
            <option value="RCNN" value="RCNN">RCNN</option>
            <option value="Logistic" value="Logistic">Logistic</option>
            <option value="FCNN" value="FCNN">FCNN</option>
            <option value="SCNN" value="SCNN">SCNN</option>
        </select>
        <p></p>
        <p></p>
        <button style="height:100px; font-size:12pt; width:100px" id="button_run" name="button_run" value="run" onclick="run_program(this.id)"> Run </button>
        <button style="height:100px; font-size:12pt; width:100px" id="button_stop" name="button_stop" value="stop" onclick="run_program(this.id)"> Stop </button>
        <p></p>
        <p></p>
        <p></p>
        <!--<h2>Output: {{ rows }}</h2>-->
        <input type="text" id="output_box" name="output_box" value="kjhkjhkj" style="height:500px; widht:2500px; font-size=10pt;">
        <textarea id="text_test" name="text_test"> "text box" </textarea>
        <script src="https://code.jquery.com/jquery-1.10.2.js"></script>

        <script>
            function run_program(clicked_id)
            {
                event.preventDefault();
                $.ajax({
                url: "/",
                type: "post",
                data: "model=" + $(" #down_models option:selected").text() + "&op=" + clicked_id,
                success: alert(clicked_id)
                })

            };
                var source = new EventSource("/");
                source.onmessage = function(event) {
                    document.getElementById("output_box").innerHTML += event.data + "<br/>"
                }
        </script>
    {% for item in rows %}
        <h1>{{ item }}</h1>
        {% endfor %}
        </form>

</body>
</html>

烧瓶程序：

from flask import Flask, Response, Request, render_template, request, stream_with_context

app = Flask("first test")

is_running = False

@app.route("/", methods=["GET"])
def test():
    global is_running
    is_running = False
    return render_template("Landingpage.html", value="hi")

from ui.sample_python_package.models import RCNN, SCNN, LOGI, FCNN, Models_test


def stream_template(template_name, **context):
    app.update_template_context(context)
    t = app.jinja_env.get_template(template_name)
    rv = t.stream(context)
    rv.disable_buffering()
    t.generate(context)
    # rv.enable_buffering()
    return rv

process = None
import subprocess, os
from werkzeug.exceptions import HTTPException
def inner(model, op):
    global is_running, process
    print("Program: ", is_running, op, model)
    if op == "button_run":
        if not is_running:
            print("Starting to Run....")
            proc = subprocess.Popen(
                ['Python',
                 "models.py",
                 model
                 ],
                preexec_fn=os.setsid,
                stdout=subprocess.PIPE
            )
            is_running = True
            print("Running process")
            process = proc
            for line in iter(proc.stdout.readline, ''):
                if proc.poll() is not None:
                    is_running = False
                    break
                print(str(line))
                # time.sleep(1)
                yield {"value": line}
        else:
            print("I am running sr ", is_running)
    elif op == "button_stop":
        if is_running:
            print("Stopping...")
            is_running = False
            process.kill()
            # os.killpg(process.pid, signal.SIGKILL)
        else:
            print("Already stopped")

@app.route("/", methods=["POST"])
def process_inputs():
    try:
        return render_template('Landingpage.html', rows=inner(model=request.form["model"], op=request.form["op"]))
    except HTTPException as excep:
        print("Exception ", excep)
        # raise Exception(excep)
        return render_template("Landingpage.html")

if __name__ == "__main__":
    app.run(debug=True)
    from gevent.select import select

Models.py

class Models_test:
    def __init__(self, model_name):
        print("Received model name: ", model_name)
        self.model_name = model_name
        self.counter = 0
        self.run()

    def get_counter(self):
        return self.counter

    def run(self):
        while(self.counter < 100):
            print("Counter: ", self.counter)
            self.counter += 1
            import time
            time.sleep(0.5)

    def stop(self):
        import sys
        sys.exit(-1)

import sys
if __name__ == "__main__":
    models = Models_test(sys.argv[1])
    sys.exit(-1)

预先感谢，桑索什

流子过程到网页的文本区域-Flask

0 个答案: