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MooglyGuy
Renegade MAME Dev
Reged: 09/01/05
Posts: 1474
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Bro stop saying "elide", nobody knows what the hell that word means *nt*
08/04/17 11:52 AM


> There have been some changes to -listxml output, and questions about how to use it
> from front-end authors. In the interests of ensuring -listxml output is useful, and
> to provide a reference for front-end developers, I've added a Python-based -listxml
> consumer called minimaws, in honour of the now-defunct MAME reference web site. It
> supports some command-line verbs and also provides an interactive web interface. The
> web interface is probably more interesting for most users and front-end authors.
>
> The minimaws application is in the MAME source tree at scripts/minimaws and should
> work on any system with MAME (or a copy of its -listxml output), Python 2.7 or Python
> 3, and a reasonably new version of SQLite (3.6.19 is required for foreign key
> support). Command-line help is provided for both the main command options and
> subcommand options (use the -h or --help flag). It's definitely incomplete at this
> point, but I'm gradually adding functionality to it. I considered a few options for
> implementing the -listxml consumer, but settled on Python with some of the more
> interactive features in JavaScript because pretty much everyone has a Python
> interpreter and a web browser. My apologies if you have trouble reading these
> languages - they're far from my favourite languages, too. I'm not sure exactly what
> level of ECMAscript it requires - I've tested it with Firefox 48, and I think the
> highest feature I use is the 'json' response type for XMLHttpRequest.
>
> Setting up currently requires a couple of steps to make a clean database and load (I
> intend to streamline this at some point):
> rm minimaws.sqlite3
> sqlite3 minimaws.sqlite3
> python minimaws.py load path/to/mame
>
> The script uses minimaws.sqlite3 in the working directory as the name for its
> database unless you override it with the --database option. Loading the database may
> take a few minutes, but query performance is good. Note that you'll need to provide
> an actual path with a slash in it if MAME isn't in your PATH (exec treats names with
> no slashes as commands from somewhere in PATH).
>
> There are a few query commands that work much like MAME's auxiliary verbs, but case
> sensitive and with better glob behaviour. You should be able to work them out. To run
> in web server mode, use the serve command:
> python minimaws.py serve
>
> By default it serves HTTP on TCP port 8080 (you can change the port with the --port
> option). The server is implemented as a WSGI application, so it could also be used in
> a WSGI container (e.g. Apache mod_wsgi), and it uses cacheable GET requests so it
> will work behind a caching proxy (e.g. Apache mod_proxy, nginx, or squid). You could
> theoretically turn most of the pages into static files too, but that would be
> unwieldy with tens of thousands of files in some directories. While I think I've made
> it resistant to directory traversal and SQL injection attacks, I open the database in
> read-only mode if Python 3.4 is available, and I've tried to avoid common sources of
> vulnerabilities, the code hasn't been audited and may not be completely secure. You
> probably shouldn't run it directly on a public web server.
>
> If you know the short name of a machine or driver, or you know the path to a source
> file with device/system definitions, you can jump straight to it with a URL (note
> that src/mame/drivers is elided in source file paths for historical reasons). You can
> also get a list of all source files with device/system definitions, although it's a
> large page and may perform poorly. Pages are interlinked pretty well - you can jump
> to any device used by a system/device, or any system that uses a device, or
> parents/clones systems. You can jump to any device defined in a source file, or the
> source file that defines a device. Example URLs you could start from include:
>
>
> http://localhost:8080/machine/intlc440
> http://localhost:8080/machine/a2mouse
> http://localhost:8080/sourcefile/src/devices/cpu/m68000/m68kcpu.cpp
> http://localhost:8080/sourcefile/
>
>
> Anyway, the most immediately useful feature for front-end authors, and possibly also
> for users of computer system emulation, is the ability to show slots options, and
> update live in response to slot card selection, all straight off the database without
> having to repeatedly invoke MAME to get updated options. Here's an example of what it
> looks like, in this case for the fairly simple TI-82:
>
>
> Although there aren't any in that example, unemulated/imperfect feature flags are
> shown for devices where applicable. Command-line flags for MAME to produce the
> selected configuration are shown, including elision of default choices. You can see
> it in action with any slotted system, for example:
>
>
> http://localhost:8080/machine/ibm5150
> http://localhost:8080/machine/apple2e
> http://localhost:8080/machine/ti82
>
>
> In terms of implementation, the database queries are all in lib/dbaccess.py, and the
> SAX2 handler that transforms the -listxml output into the normalised database schema
> is in lib/lxparse.py. The web service is in lib/wsgiserve.py (yes it's a bit ugly
> because I've forgone a nice templating engine so it will work without any additional
> modules over a standard Python installation), and static CSS/JavaScript is in
> lib/assets.
>
> The live slot selection is mostly done in lib/assets/machine.js with a bit of help
> from the web service. It works as follows:
>
>
> On a page for a system/device with slots, the JavaScript requests slot information
> for the machine and any devices that can be inserted into slots (fetch_slots). It
> keeps a map of device slot information (slot_info) and checks whether it has already
> received or requested details for a device.
> The only trick in the slot info web service (lib.wsgiserve.SlotsRpcHandler.data_page)
> is to filter out slots that come from default devices in other slots. This can be
> done lexically, there's nothing difficult about it.
> Once all the slot information has been gathered, the slot UI is populated
> (populate_slots).
> When a slot card is selected, any subslots are added to the UI (in the callback
> generated by make_slot_change_handler). This uses the same add_slot_items function
> that populate_slots uses to create the actual controls and apply defaults.
> When applying defaults, remember to walk from the topmost level inwards - defaults
> specified at a higher level take precedence.
> When a slot card is selected, the JavaScript asynchronously requests emulation status
> flags if it doesn't have them already (fetch_machine_flags) and adds the information
> to the table (add_flag_rows).
> The command-line flag preview is updated in update_cmd_preview after any changes.
>
>
> All the code is BSD-licensed, so feel free to integrate it into your applications if
> it'll be useful.







Entire thread
Subject Posted by Posted on
* minimaws: a reference -listxml consumer Vas Crabb 08/03/17 05:47 PM
. * Bro stop saying "elide", nobody knows what the hell that word means *nt* MooglyGuy  08/04/17 11:52 AM
. * Re: Bro stop saying "elide", nobody knows what the hell that word means *nt* StilettoAdministrator  08/04/17 06:25 PM
. * Re: Bro stop saying "elide", nobody knows what the hell that word means *nt* Vas Crabb  08/04/17 06:41 PM
. * Re: Bro stop saying "elide", nobody knows what the hell that word means *nt* BIOS-D  08/06/17 02:53 PM
. * Re: Bro stop saying "elide", nobody knows what the hell that word means *nt* StilettoAdministrator  08/06/17 06:13 AM
. * Re: Bro stop saying "elide", nobody knows what the hell that word means *nt* MooglyGuy  08/05/17 01:07 AM
. * Re: minimaws: a reference -listxml consumer Vas Crabb  08/04/17 10:28 AM
. * Re: minimaws: a reference -listxml consumer Vas Crabb  08/04/17 09:23 AM

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