rspivak / lsbaws Goto Github PK

After running the pyramid server, I can get the response shown in the browser, but after a few seconds, below error was showing on the console and the server was down:
Traceback (most recent call last):
File "webserver2.py", line 142, in
httpd.serve_forever()
File "webserver2.py", line 41, in serve_forever
self.handle_one_request()
File "webserver2.py", line 51, in handle_one_request
self.parse_request(request_data)
File "webserver2.py", line 64, in parse_request
request_line = text.splitlines()[0]
IndexError: list index out of range

I came across the Error if I am not comment the "print" after "os.waitpid" when using the code from you github.
I search solution from the internet, it tell me that maybe caused by lock's problem.
So I comment that code and it runs normally.

code

(webserver3h.py from your github, I just add some function about handle some encoding for python3)

def grim_reaper(signum, frame):
    while True:
        try:
            pid, status = os.waitpid(
                -1,          # Wait for any child process
                 os.WNOHANG  # Do not block and return EWOULDBLOCK error
            )
            print(
                'Child {pid} terminated with status {status}\n'.format(pid=pid, status=status)
            )
        except OSError:
            return

Error

    httpd.serve_forever()
  File "webserver3.py", line 72, in serve_forever
    pid = os.fork()
  File "webserver3.py", line 22, in grim_reaper
    'Child {pid} terminated with status {status}\n'.format(pid=pid, status=status)
  File "webserver3.py", line 22, in grim_reaper
    'Child {pid} terminated with status {status}\n'.format(pid=pid, status=status)
RuntimeError: reentrant call inside <_io.BufferedWriter name='<stdout>'>

test webservice3e.py with curl commands。There is no socket.error :[Errno 4] Interrupted system call when socket.accetp(). what happened ?

Hi, I tried the first demo webserver1.py. When I open the URL http://localhost:8888/hello in my Firefox, the web page is blank. But, the terminal occurs the following massage:

GET /hello HTTP/1.1
Host: localhost:8888
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:38.0) Gecko/20100101 Firefox/38.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
DNT: 1
Connection: keep-alive

What's wrong?

Hi, thanks for the series. I spend this weekend reading these articles and really enjoy them.
But I am so confused that why 'os._exit(0)' should be in the for loop. Does it mean immediately exit the child process after the first connection?

Besides having forgotten the parentheses around all the "print" statements in the script for the first part of your tutorial, I get the following error:
"TypeError: a bytes-like object is required, not 'str'" on line 20.

can you help me debug webapp with django

ile "/usr/local/Cellar/python@2/2.7.15_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/importlib/__init__.py" in import_module
  37.     __import__(name)

File "/Users/ajmd/code/webserver/helloworld/urls.py" in <module>
  1. from django.conf.urls import patterns, include, url

Exception Type: ImportError at /hello
Exception Value: cannot import name patterns

and the source code:

from django.conf.urls import patterns, include, url
from django.contrib import admin

urlpatterns = patterns(
    '',
    # Examples:
    # url(r'^$', 'helloworld.views.home', name='home'),
    # url(r'^blog/', include('blog.urls')),

    url(r'^admin/', include(admin.site.urls)),

    (r'^hello', 'helloworld.views.index'),

)

['pyramidapp']
Traceback (most recent call last):
File "main.py", line 116, in
module, application = app_path.split(':')
ValueError: need more than 1 value to unpack
Program ended with exit code: 1

curl(7.58.0) terminated, without display "Hello, World!".

I think, the 'http_response' is deficient.
With this, it working good:

http_response = b"""\
HTTP/1.1 200 OK
Content-Type: text/html

Hello, World!
"""

Problem:
TypeError: a bytes-like object is required, not 'str'

Solve

http_response = b"""\
HTTP/1.1 200 OK

Hello, World!
"""

The part2 server request to load the app callable from the djangoapp doesn't work in Django version 1.10.1

The contents of the helloworld/urls.py has to be changed

from:

from django.conf.urls import patterns, include, url
from django.contrib import admin

urlpatterns = patterns(
'',
# Examples:
# url(r'^$', 'helloworld.views.home', name='home'),
# url(r'^blog/', include('blog.urls')),

url(r'^admin/', include(admin.site.urls)),

(r'^hello', 'helloworld.views.index'),

)

To:

from django.conf.urls import include, url
from django.contrib import admin

from . import views

urlpatterns = [

url(r'^admin/', admin.site.urls),

url(r'^hello/', views.index),

]