02-01-2020
Update:
I am finding it hard to build a decent app (beyond a very basic app) with Blynk. With four labeled data displays, that "cost" met 400 x 4 = 1600 credits. That means I cannot add more of value (like another country or two's datasets for the Wuhan virus and a data chart), without getting into the “feed Blynk money”¯ business model. Blynk is starting to feel "disappointing". I was advised to “just give Blynk another 1000 free credits to share”¯; but I don't have any “free credits to share”¯ because this “very tiny app”¯ leaves me with only 400 "Blynk energy credits".
As many people know, I have a very low threshold for corporate greed, and surveillance capitalism in general, and I have promoted Blynk in the public service cause; but I think I was premature in doing so due to Blink's business model.
So, after this experiment with Blynk, I'll probably stop developing public service apps with Blynk. I have already "learned" the impression that Blynk is quite a bit more “feed me money”¯ than I care for; based on my experience with this public service app today. Unfortunately, as some know, I have a very low threshold for the "Blynk-like" business model, as I have come to understand it. Maybe I simply do not understand it?
People keep saying Blynk is "free"; but Blynk is not free for any real useful app. Everything in the app has a “cost”¯ and after we use the very tiny “2000 Blynk energy credits”¯ we have to pay real money. What am I missing? Any user created app of more than a few small data parameters exceeds the "free credits" provided by Blynk. I find today, I cannot add a chart of the Wuhan coronavirus without digging into my bank account to feed Blynk's requirement for "real coin" on a public service app. I don't have the “Blynk credits”¯ to add more countries, charts, or whatever. It's seriously - pay to play.
This Blynk business model is not designed for public service, as I have experienced over the past day.
Also, on the tech side, I do not like / appreciate it when we create a Blynk app on our phone, Blynk just “deletes it”¯ without warning. I was running a test server monitoring app one phone, and the Wuhan stats app on another phone, and Blynk just deleted the server monitoring app and replaced it with the Wuhun stats app without warning me. I'm not happy about this at all. My work on that "server monitoring app" is gone from Blynk; there appears to be no mechanism to save the Blynk app we created in the phone, so after Blynk deletes it, all that work is GONE!
Anyway, I have a low threshold for the things I am seeing with Blynk, especially after building a public service app, meant only to help others who are in crisis, and learning more about Blynk today, in the process.
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)