Just Copy paste this code into the beginning of a python file (eg:test.py)
After the code try (this example is also added in the code)
#EXAMPLES
cars = ["Ford", "Volvo", "BMW"]
# THIS WILL LOG ANYTHING AS STRING
logger_custom_string.debug(anything(cars,traceback.format_stack(limit=5)))
# THIS WILL LOG ANY OBJECT
logger_custom_string.debug(pp_odir(cars,traceback.format_stack(limit=5)))
# THIS WILL LOG ALL LOCALS
logger_custom_string.debug(pp_odir(locals(),traceback.format_stack(limit=5)))This will print (for streamhandler and for filehandler its put into log file without colors)
--------------------------------------------------------------------------------------------------------------
2020-08-26 15:12:51,852
XXXDEBUGXXX <module>() python_logging.py[:219] custom_string
NONE_NO_REQUEST_ABS_PATH
NONE_NO_REQUEST_METHOD
--------------------------------------------------------------------------------------------------------------
214:
215: #EXAMPLES
216: cars = ["Ford", "Volvo", "BMW"]
217:
218: # THIS WILL LOG ANYTHING AS STRING
219***: logger_custom_string.debug(anything(cars,traceback.format_stack(limit=5)))
220:
221: # THIS WILL LOG ANY OBJECT
222: logger_custom_string.debug(pp_odir(cars,traceback.format_stack(limit=5)))
223:
224: # THIS WILL LOG ALL LOCALS
['Ford', 'Volvo', 'BMW']
File "python_logging.py", line 219, in <module>
logger_custom_string.debug(anything(cars,traceback.format_stack(limit=5)))
214:
215: #EXAMPLES
216: cars = ["Ford", "Volvo", "BMW"]
217:
218: # THIS WILL LOG ANYTHING AS STRING
219***: logger_custom_string.debug(anything(cars,traceback.format_stack(limit=5)))
220:
221: # THIS WILL LOG ANY OBJECT
222: logger_custom_string.debug(pp_odir(cars,traceback.format_stack(limit=5)))
223:
224: # THIS WILL LOG ALL LOCALS
--------------------------------------------------------------------------------------------------------------
2020-08-26 15:12:51,860
XXXDEBUGXXX <module>() python_logging.py[:222] custom_string
NONE_NO_REQUEST_ABS_PATH
NONE_NO_REQUEST_METHOD
--------------------------------------------------------------------------------------------------------------
217:
218: # THIS WILL LOG ANYTHING AS STRING
219: logger_custom_string.debug(anything(cars,traceback.format_stack(limit=5)))
220:
221: # THIS WILL LOG ANY OBJECT
222***: logger_custom_string.debug(pp_odir(cars,traceback.format_stack(limit=5)))
223:
224: # THIS WILL LOG ALL LOCALS
225: logger_custom_string.debug(pp_odir(locals(),traceback.format_stack(limit=5)))
226:
227:
[
"Ford",
"Volvo",
"BMW"
]
File "python_logging.py", line 222, in <module>
logger_custom_string.debug(pp_odir(cars,traceback.format_stack(limit=5)))
217:
218: # THIS WILL LOG ANYTHING AS STRING
219: logger_custom_string.debug(anything(cars,traceback.format_stack(limit=5)))
220:
221: # THIS WILL LOG ANY OBJECT
222***: logger_custom_string.debug(pp_odir(cars,traceback.format_stack(limit=5)))
223:
224: # THIS WILL LOG ALL LOCALS
225: logger_custom_string.debug(pp_odir(locals(),traceback.format_stack(limit=5)))
226:
227:
--------------------------------------------------------------------------------------------------------------
2020-08-26 15:12:51,865
XXXDEBUGXXX <module>() python_logging.py[:225] custom_string
NONE_NO_REQUEST_ABS_PATH
NONE_NO_REQUEST_METHOD
--------------------------------------------------------------------------------------------------------------
220:
221: # THIS WILL LOG ANY OBJECT
222: logger_custom_string.debug(pp_odir(cars,traceback.format_stack(limit=5)))
223:
224: # THIS WILL LOG ALL LOCALS
225***: logger_custom_string.debug(pp_odir(locals(),traceback.format_stack(limit=5)))
226:
227:
{
"VerFormatter": "<class '__main__.VerFormatter'>",
"__annotations__": {},
"__builtins__": "<module 'builtins' (built-in)>",
"__cached__": null,
"__doc__": null,
"__file__": "python_logging.py",
"__loader__": "<_frozen_importlib_external.SourceFileLoader object at 0x7f3a3097be48>",
"__name__": "__main__",
"__package__": null,
"__spec__": null,
"anything": "<function anything at 0x7f3a309b61e0>",
"cars": [
"Ford",
"Volvo",
"BMW"
],
"exposed_request": null,
"formatter": "<__main__.VerFormatter object at 0x7f3a308409e8>",
"handler": "<StreamHandler <stderr> (DEBUG)>",
"json_dumps_default": "<function json_dumps_default at 0x7f3a307851e0>",
"keys_string": "<function keys_string at 0x7f3a30785158>",
"logger_custom_string": "<Logger custom_string (DEBUG)>",
"logging": "<module 'logging' from '/usr/lib/python3.7/logging/__init__.py'>",
"pp_odir": "<function pp_odir at 0x7f3a307852f0>",
"pp_odir_getobject": "<function pp_odir_getobject at 0x7f3a30785268>",
"pp_traceback": "<function pp_traceback at 0x7f3a30785378>",
"traceback": "<module 'traceback' from '/usr/lib/python3.7/traceback.py'>"
}
File "python_logging.py", line 225, in <module>
logger_custom_string.debug(pp_odir(locals(),traceback.format_stack(limit=5)))
220:
221: # THIS WILL LOG ANY OBJECT
222: logger_custom_string.debug(pp_odir(cars,traceback.format_stack(limit=5)))
223:
224: # THIS WILL LOG ALL LOCALS
225***: logger_custom_string.debug(pp_odir(locals(),traceback.format_stack(limit=5)))
226:
227:
Here we can see the locals() and also the line where the logging is called and also stacktrace. This will help in debugging the values
upstream webapp {
server webapp:8000;
}
upstream jupyter {
server jupyter:8888;
}
upstream db {
server phpmyadmin:80;
}
server {
listen 80;
location / {
proxy_pass http://webapp;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_redirect off;
}
}
server {
listen 80;
server_name jyp.*;
location / {
proxy_pass http://jupyter;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_redirect off;
}
location ~ /api/kernels/ {
proxy_pass http://jupyter;
proxy_set_header Host $host;
# websocket support
proxy_http_version 1.1;
proxy_set_header Upgrade "websocket";
proxy_set_header Connection "Upgrade";
proxy_read_timeout 86400;
}
location ~ /terminals/ {
proxy_pass http://jupyter;
proxy_set_header Host $host;
# websocket support
proxy_http_version 1.1;
proxy_set_header Upgrade "websocket";
proxy_set_header Connection "Upgrade";
proxy_read_timeout 86400;
}
}
server {
listen 80;
server_name db.*;
location / {
proxy_pass http://db;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_redirect off;
}
}
The WebSocket protocol is different from the HTTP protocol, but the WebSocket handshake is compatible with HTTP, using the HTTP Upgrade facility to upgrade the connection from HTTP to WebSocket. This allows WebSocket applications to more easily fit into existing infrastructures. For example, WebSocket applications can use the standard HTTP ports 80 and 443, thus allowing the use of existing firewall rules.
A WebSocket application keeps a long‑running connection open between the client and the server, facilitating the development of real‑time applications. The HTTP Upgrade mechanism used to upgrade the connection from HTTP to WebSocket uses the Upgrade and Connection headers. There are some challenges that a reverse proxy server faces in supporting WebSocket. One is that WebSocket is a hop‑by‑hop protocol, so when a proxy server intercepts an Upgrade request from a client it needs to send its own Upgrade request to the backend server, including the appropriate headers. Also, since WebSocket connections are long lived, as opposed to the typical short‑lived connections used by HTTP, the reverse proxy needs to allow these connections to remain open, rather than closing them because they seem to be idle.
NGINX supports WebSocket by allowing a tunnel to be set up between a client and a backend server. For NGINX to send the Upgrade request from the client to the backend server, the Upgrade and Connection headers must be set explicitly, as in this example:
location /wsapp/ {
proxy_pass http://wsbackend;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "Upgrade";
proxy_set_header Host $host;
}
Once this is done, NGINX deals with this as a WebSocket connection.