Python多处理/带有Cherrypy的队列
[英]Python multiprocessing / Queue with cherrypy
问题描述
我想用cherrypy做一个python代码。 目的是从UI调用脚本，而脚本在控制台上生成日志时，将其打印在UI（Iframe / div）上。 我正在使用CherryPy-3.2.4和Python 2.7。 以下是我编写的拒绝工作的示例代码。
TestProcess.py
from multiprocessing import Process, Queue
import subprocess
import os, os.path
from string import Template
import cherrypy
from multiprocessing import Process, Queue
import HTML
import TestScript
class TestProcess(object):
PID=0
jquery_url = 'C:\CherryPy\TestScripts\jquery\jquery-1.11.1.js'
q=Queue()
@cherrypy.expose
def index(self):
html = """\
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> Test Doc </TITLE>
<script type="text/javascript" src="/static/jq/jquery-1.11.1.js"></script>
</HEAD>
<BODY>
<BR/>
<h3>Test utility</h3>
<form id="ping_form" target="console_iframe" method="post" action="/f">
<button id="ping" type="submit">Upgrade Installed Releases</button>
</form>
<BR/>
<iframe name="console_iframe" frameborder="1" width="1200"/>
</BODY>
</HTML>
"""
t = Template(html)
page = t.substitute(jquery_url=self.jquery_url)
return page
def f1():
print "*********** TEST **********************"
q.put([42, None, 'hello'])
@cherrypy.expose
def f(self, **kw):
q=Queue()
ts = TestScript.TestScript()
p = Process(target=ts.testCallFunction, args=(q,))
p.start()
#print q.get() # prints "[42, None, 'hello']"
p.join()
print "Test F"
def run_command():
# The yeilds here are the key to keeping things streaming
yield '<style>body {font-family: monospace;}</style>'
while(p.is_alive()):
while(not q.empty()):
yield q.get_nowait()
while(not q.empty()):
yield q.get_nowait()
return run_command()
if __name__ == '__main__':
conf = {
'/': {
'tools.sessions.on': True,
'tools.staticdir.root': os.path.abspath(os.getcwd())
},
'/static': {
'tools.staticdir.on': True,
'tools.staticdir.dir': './public'
}
}
q = Queue()
cherrypy.server.socket_host = '10.49.69.103'
cherrypy.config.update({
'log.screen':True,
'tools.sessions.on': True,
'checker.on':False
})
cherrypy.tree.mount(TestProcess(), config=None)
cherrypy.engine.start()
cherrypy.engine.block()
#cherrypy.quickstart(TestProcess(), '/', conf)
类TestScript
class TestScript(object):
q=Queue()
def write_queue(self,data):
print "*********** TEST **********************"
scroll_to_bottom = '<script type="text/javascript">window.scrollBy(0,50);</script>'
if data == '\n':
self.q.put("\n<br />%s" % scroll_to_bottom) # include the iframe scroll fix
else:
self.q.put(data)
def testCallFunction(self, q):
#proc = subprocess.Popen(['python','CreateLog.py'],stdout=subprocess.PIPE)
cmd = subprocess.Popen(['python','CreateLog.py'], shell=True, stdout=subprocess.PIPE)
while True:
data = cmd.stdout.read(1) # Alternatively proc.stdout.read(1024)
if len(data) == 0:
break
self.write_queue(data) # sys.stdout.buffer.write(data) on Python 3.x
#print "*********** TEST **********************"
脚本CreateLog.py
#filters output
import time
i = 0
while (i<=10):
print hex(i)*512
i += 1
time.sleep(0.5)
运行时出现的错误
[24/Jul/2014:16:59:10] ENGINE Bus STARTING
[24/Jul/2014:16:59:10] ENGINE Started monitor thread 'Autoreloader'.
[24/Jul/2014:16:59:10] ENGINE Started monitor thread '_TimeoutMonitor'.
[24/Jul/2014:16:59:15] ENGINE Error in 'start' listener <bound method Server.sta
rt of <cherrypy._cpserver.Server object at 0x01583390>>
Traceback (most recent call last):
File "c:\Python27\lib\site-packages\cherrypy\process\wspbus.py", line 197, in
publish
output.append(listener(*args, **kwargs))
File "c:\Python27\lib\site-packages\cherrypy\_cpserver.py", line 151, in start
ServerAdapter.start(self)
File "c:\Python27\lib\site-packages\cherrypy\process\servers.py", line 168, in
start
wait_for_free_port(*self.bind_addr)
File "c:\Python27\lib\site-packages\cherrypy\process\servers.py", line 412, in
wait_for_free_port
raise IOError("Port %r not free on %r" % (port, host))
IOError: Port 8080 not free on '10.49.69.103'
[24/Jul/2014:16:59:15] ENGINE Shutting down due to error in start listener:
Traceback (most recent call last):
File "c:\Python27\lib\site-packages\cherrypy\process\wspbus.py", line 235, in
start
self.publish('start')
File "c:\Python27\lib\site-packages\cherrypy\process\wspbus.py", line 215, in
publish
raise exc
ChannelFailures: IOError("Port 8080 not free on '10.49.69.103'",)
我究竟做错了什么 ？
2 个解决方案
解决方案1
1 2014-07-28 19:40:11
解决方案2
0 2014-07-25 01:19:28
端口8080不是免费的，因此HTTP服务器无法监听它。 尝试使用netstat -anpt查看正在使用该端口的端口，或者尝试使用“ server.socket_port：8081”或其他可用的端口。
Cherrypy：多处理
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