02-01-2020
Update:
I know why Blynk auto-deleted the Blynk app on one of my iPhones. The reason is about "money". Blynk wants our money, as soon as you get beyond a "toy" app with a few data variables. If you build any app of any substance, you will pay for it.
Blynk gives 2000 tiny toy credits for a user to build an app. But that means across all devices on same email account. So because I was running (1) a small six data point service monitoring app and (2) the Wuhan virus stats app with for data points; Blynk synced my two iPhones and deleted the small server monitoring app without warning and without saving the data for the app anywhere.
However, you can avoid having Blynk auto-delete your apps like this by having a different email for each app, LOL.
Amazing! Blynk considers deleting your Blynk app without warning or saving the app before they delete it as "their business model". Lesson Learned!
BEWARE.
My goal was to build a free public service application for those concerned about the looming coronavirus pandemic in China. I learned a lot about Blynk in the process, obviously I cannot build anything more than a "toy app" before Blynk will require coin. I am a bit in shock about this; but then again, what do we expect from corporations these days? They are all in it for the big money, right?!
This User Gave Thanks to Neo For This Post:
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LEARN ABOUT DEBIAN
plack::app::urlmap
Plack::App::URLMap(3pm) User Contributed Perl Documentation Plack::App::URLMap(3pm)
NAME
Plack::App::URLMap - Map multiple apps in different paths
SYNOPSIS
use Plack::App::URLMap;
my $app1 = sub { ... };
my $app2 = sub { ... };
my $app3 = sub { ... };
my $urlmap = Plack::App::URLMap->new;
$urlmap->map("/" => $app1);
$urlmap->map("/foo" => $app2);
$urlmap->map("http://bar.example.com/" => $app3);
my $app = $urlmap->to_app;
DESCRIPTION
Plack::App::URLMap is a PSGI application that can dispatch multiple applications based on URL path and hostnames (a.k.a "virtual hosting")
and takes care of rewriting "SCRIPT_NAME" and "PATH_INFO" (See "HOW THIS WORKS" for details). This module is inspired by Rack::URLMap.
METHODS
map
$urlmap->map("/foo" => $app);
$urlmap->map("http://bar.example.com/" => $another_app);
Maps URL path or an absolute URL to a PSGI application. The match order is sorted by host name length and then path length.
URL paths need to match from the beginning and should match completely till the path separator (or the end of the path). For example,
if you register the path "/foo", it will match with the request "/foo", "/foo/" or "/foo/bar" but it won't match with "/foox".
Mapping URL with host names is also possible, and in that case the URL mapping works like a virtual host.
Mappings will nest. If $app is already mapped to "/baz" it will match a request for "/foo/baz" but not "/foo". See "HOW THIS WORKS"
for more details.
mount
Alias for "map".
to_app
my $handler = $urlmap->to_app;
Returns the PSGI application code reference. Note that the Plack::App::URLMap object is callable (by overloading the code dereference),
so returning the object itself as a PSGI application should also work.
DEBUGGING
You can set the environment variable "PLACK_URLMAP_DEBUG" to see how this application matches with the incoming request host names and
paths.
HOW THIS WORKS
This application works by fixing "SCRIPT_NAME" and "PATH_INFO" before dispatching the incoming request to the relocated applications.
Say you have a Wiki application that takes "/index" and "/page/*" and makes a PSGI application $wiki_app out of it, using one of supported
web frameworks, you can put the whole application under "/wiki" by:
# MyWikiApp looks at PATH_INFO and handles /index and /page/*
my $wiki_app = sub { MyWikiApp->run(@_) };
use Plack::App::URLMap;
my $app = Plack::App::URLMap->new;
$app->mount("/wiki" => $wiki_app);
When a request comes in with "PATH_INFO" set to "/wiki/page/foo", the URLMap application $app strips the "/wiki" part from "PATH_INFO" and
appends that to "SCRIPT_NAME".
That way, if the $app is mounted under the root (i.e. "SCRIPT_NAME" is "") with standalone web servers like Starman, "SCRIPT_NAME" is now
locally set to "/wiki" and "PATH_INFO" is changed to "/page/foo" when $wiki_app gets called.
AUTHOR
Tatsuhiko Miyagawa
SEE ALSO
Plack::Builder
perl v5.14.2 2011-06-22 Plack::App::URLMap(3pm)