我希望能够访问网页,它将运行python函数并在网页中显示进度。
因此,当您访问该网页时,您可以看到脚本的输出,就像您从命令行运行它一样。
根据这里的答案
How to continuously display python output in a webpage?
我正在尝试显示 PYTHON
的输出我正在尝试使用Markus Unterwaditzer的代码和python函数。
import flask
import subprocess
app = flask.Flask(__name__)
def test():
print "Test"
@app.route('/yield')
def index():
def inner():
proc = subprocess.Popen(
test(),
shell=True,
stdout=subprocess.PIPE
)
while proc.poll() is None:
yield proc.stdout.readline() + '<br/>\n'
return flask.Response(inner(), mimetype='text/html') # text/html is required for most browsers to show the partial page immediately
app.run(debug=True, port=5005)
它运行但我在浏览器中看不到任何内容。
答案 0 :(得分:23)
你看起来好像不想调用测试函数,而是一个提供输出的实际命令行进程。还可以从proc.stdout.readline或其他东西创建一个iterable。你也从Python中说过我忘了包含你应该在子进程中提取你想要的任何python代码并将它放在一个单独的文件中。
import flask
import subprocess
import time #You don't need this. Just included it so you can see the output stream.
app = flask.Flask(__name__)
@app.route('/yield')
def index():
def inner():
proc = subprocess.Popen(
['dmesg'], #call something with a lot of output so we can see it
shell=True,
stdout=subprocess.PIPE
)
for line in iter(proc.stdout.readline,''):
time.sleep(1) # Don't need this just shows the text streaming
yield line.rstrip() + '<br/>\n'
return flask.Response(inner(), mimetype='text/html') # text/html is required for most browsers to show th$
app.run(debug=True, port=5000, host='0.0.0.0')
答案 1 :(得分:1)
这是一个允许您流式传输子流程输出的解决方案。事后使用相同的模板静态加载它(假设您的子进程将它自己的输出记录到文件中;如果没有,则将进程输出记录到日志文件中留给读者练习)
from flask import Response, escape
from yourapp import app
from subprocess import Popen, PIPE, STDOUT
SENTINEL = '------------SPLIT----------HERE---------'
VALID_ACTIONS = ('what', 'ever')
def logview(logdata):
"""Render the template used for viewing logs."""
# Probably a lot of other parameters here; this is simplified
return render_template('logview.html', logdata=logdata)
def stream(first, generator, last):
"""Preprocess output prior to streaming."""
yield first
for line in generator:
yield escape(line.decode('utf-8')) # Don't let subproc break our HTML
yield last
@app.route('/subprocess/<action>', methods=['POST'])
def perform_action(action):
"""Call subprocess and stream output directly to clients."""
if action not in VALID_ACTIONS:
abort(400)
first, _, last = logview(SENTINEL).partition(SENTINEL)
path = '/path/to/your/script.py'
proc = Popen((path,), stdout=PIPE, stderr=STDOUT)
generator = stream(first, iter(proc.stdout.readline, b''), last)
return Response(generator, mimetype='text/html')
@app.route('/subprocess/<action>', methods=['GET'])
def show_log(action):
"""Show one full log."""
if action not in VALID_ACTIONS:
abort(400)
path = '/path/to/your/logfile'
with open(path, encoding='utf-8') as data:
return logview(logdata=data.read())
通过这种方式,您可以在命令的初始运行期间(通过POST)和在事实之后静态提供保存的日志文件时使用一致的模板。