No, there’s nothing wrong with assert as long as you use it as intended. That is, it’s supposed to be for catching cases that “can’t happen”, during debugging, as opposed to normal error handling. Assert: A failure in the program’s logic itself. Error Handling: An erroneous input or system state not due to a bug … Read more
Use logging.exception from within the except: handler/block to log the current exception along with the trace information, prepended with a message. import logging LOG_FILENAME = ‘/tmp/logging_example.out’ logging.basicConfig(filename=LOG_FILENAME, level=logging.DEBUG) logging.debug(‘This message should go to the log file’) try: run_my_stuff() except: logging.exception(‘Got exception on main handler’) raise Now looking at the log file, /tmp/logging_example.out: DEBUG:root:This message should … Read more
First, you need to enable and see detailed errors of your web messages, because this is a general message without giving information on what’s really happening for security reasons. With the detailed error, you can locate the real issue here. Also, if you can run the browser on the server, you get details on the … Read more
The “Script error.” happens in Firefox, Safari, and Chrome when an exception violates the browser’s same-origin policy – i.e. when the error occurs in a script that’s hosted on a domain other than the domain of the current page. This behavior is intentional, to prevent scripts from leaking information to external domains. For an example … Read more
There are several approaches to customize the error handling behavior with JAX-RS. Here are three of the easier ways. The first approach is to create an Exception class that extends WebApplicationException. Example: public class NotAuthorizedException extends WebApplicationException { public NotAuthorizedException(String message) { super(Response.status(Response.Status.UNAUTHORIZED) .entity(message).type(MediaType.TEXT_PLAIN).build()); } } And to throw this newly create Exception you simply: … Read more
Since jQuery 1.5 you can use the deferred objects mechanism: $.post(‘some.php’, {name: ‘John’}) .done(function(msg){ }) .fail(function(xhr, status, error) { // error handling }); Another way is using .ajax: $.ajax({ type: “POST”, url: “some.php”, data: “name=John&location=Boston”, success: function(msg){ alert( “Data Saved: ” + msg ); }, error: function(XMLHttpRequest, textStatus, errorThrown) { alert(“some error”); } });
I’d check out window.onerror Example: window.onerror = function(message, url, lineNumber) { //save error and send to server for example. return true; }; Keep in mind that returning true will prevent the firing of the default handler, and returning false will let the default handler run.
If you get this error with Firebase Cloud Functions, this is due to the limitations of the free tier (outbound networking only allowed to Google services). Upgrade to the Flame or Blaze plans for it to work.
TLDR for Python 3: import subprocess import sys with open(“test.log”, “wb”) as f: process = subprocess.Popen(your_command, stdout=subprocess.PIPE) for c in iter(lambda: process.stdout.read(1), b””): sys.stdout.buffer.write(c) f.buffer.write(c) You have two ways of doing this, either by creating an iterator from the read or readline functions and do: import subprocess import sys # replace “w” with “wb” for … Read more
Try: error: function(xhr, status, error) { var err = eval(“(” + xhr.responseText + “)”); alert(err.Message); }