World: r3wp
[!REBOL3 Schemes] Implementors guide
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BrianH 27-Jan-2010 [1900x2] | This is all mezzanine stuff. We don't need to wait for Carl. |
We only need Carl's help with native stuff. We could use his help with certain other activities that he's good at, but we don't *need* it. | |
Graham 27-Jan-2010 [1902] | Ok, I'm confused .. i see Gabriele's prot-http says it is a module, but there is no exports |
BrianH 27-Jan-2010 [1903] | It doesn't export anything - it doesn't need to. |
Graham 27-Jan-2010 [1904] | the reason being ? |
BrianH 27-Jan-2010 [1905x3] | Once the protocol is installed then you just use OPEN, READ and WRITE, etc. directly. You only need exported helper functions for some protocols, but http is covered by the default actions. |
For instance pop or imap might need a SEND-EMAIL function exported, and maybe a SET-NET. That's all. | |
I'd be wary of using a SEND function until we really know what the services infrastructure is going to look like. | |
Graham 27-Jan-2010 [1908x2] | So, any function which takes a port as an argument inside the module ( if it is also a scheme ) does not need exporting. |
The rest we have to access via the module path | |
BrianH 27-Jan-2010 [1910] | Nope, not even then. Most protocol functions don't have to be accessed from the outside except by the port infrastructure. Functions in the scheme are only called by port infrastructure, and most functions are helper functions. The only words you export would be user-visible functions that users are supposed to call directly. |
Graham 27-Jan-2010 [1911] | That presupposes that there is no reusable code in the modules |
BrianH 27-Jan-2010 [1912x2] | In general you never access a word through a module path. If it needs to be user-accessible, export it or wrap it in a function that you export. System accessible is another matter, and usually involves installing something somewhere in the system hierarchy (like system/schemes, for instance). |
No, it supposes that you are refactoring your modules so that the reusable code is getting exported from a reusable code module, then imported into your specific module. | |
Graham 27-Jan-2010 [1914] | The module author can not possibly know what users might want to reuse |
BrianH 27-Jan-2010 [1915] | Then provide the source. Making things safely reusable takes planning. Providing the source doesn't (or at least not as much). |
Graham 27-Jan-2010 [1916] | Say I wanted to create a http header, I would naturally want to use Gab's make-http-request function that is not exported |
BrianH 27-Jan-2010 [1917x2] | Say you wanted to create an HTTP header, and it had nothing to do with HTTP. Are you sure you want to create the same header? Or are you sure that you don't actually want to extend the existing http scheme? The author isn't psychic. |
Making code reusable takes planning. If you want to reuse code safely, do the planning. Or copy and paste. | |
Graham 27-Jan-2010 [1919] | And we arrive at a situation where you end up duplicating code everywhere |
BrianH 27-Jan-2010 [1920] | Not really. You could do the planning, and refactor. Even Gabriele's code, since he provided the source. |
Graham 27-Jan-2010 [1921] | But we lack the sources to recompile the core with our refactored code |
BrianH 27-Jan-2010 [1922x2] | We can replace a protocol in memory if need be. Or load one from host code. Or better yet, fix the source in DevBase. |
Right now I would rather see duplication, so we can get a better idea of what needs to be reused. | |
Graham 27-Jan-2010 [1924x2] | Well, I don't want to see all the code duplication we have in r2 |
every script defining digits as a bitset even though it's already defined in one of the schemes | |
BrianH 27-Jan-2010 [1926x2] | We're in the planning phase when it comes to scheme infrastructure (not port infrastructure). I want to tweak/redo the scheme dialect, but there haven't been enough examples of schemes yet to see what needs to be done. Perhaps making a protected collection of standard bitsets would be a good idea, but who can say for sure at this point? |
You'll help out a lot there, apparently :) | |
BrianH 28-Jan-2010 [1928] | For that matter, the exports of the http scheme weren't planned by Gabriele at all. There was no module system when he wrote it, and system exports didn't work yet when Carl put it in a module, so there were no code exports. And for that matter, reuse was unnecessary because there was only one scheme. Assume that the code needs refactoring. |
Graham 28-Jan-2010 [1929x4] | I'd like to ask how we might manage the download of a large file by thehttp protocol |
Actually I just tried downloading a 16Mb file and it timedout in R3 but downloaded okay in R2. | |
So, it seems you need to open the port instead, and then modify the timeout | |
Maybe what should happen instead is that if you receive other than xml, text, then the data should be streamed a file and a file! returned instead ( like Cheyenne does with html uploads ) ... | |
Pekr 28-Jan-2010 [1933] | BrianH: I think that there is now bunch of examples of schemes, so it might start to become apparent, what is needed :-) |
BrianH 28-Jan-2010 [1934] | After the first of the month, that's the plan. |
Graham 28-Jan-2010 [1935x2] | There are a few schemes now but they're basicall all written by me ... so I don't think there's much variety there. Others have commented that the awake handler should be as small as possible and to keep the state machine outside ... |
If anyone is interested .. this is the "bug" I came across http://developer.amazonwebservices.com/connect/thread.jspa?threadID=41782&tstart=0 I had to change my to-iso8601 function to add the extra precision required. | |
eFishAnt 29-Jan-2010 [1937x2] | aha, cool, those links I was looking for! |
(ports, schemes, etc)... I did get my product mostely working in R3 (large % networking) up to about 90% and to be honest, I didn't put much time into the porting R2 -> R3 yet. | |
Graham 29-Jan-2010 [1939] | Where's the video codec you did?? |
eFishAnt 29-Jan-2010 [1940] | I need to port it to the latest R3. There was a point where the GC got changed and the real-time performance went crazy, and I want to blend it into the new architecture...so I don't want to put out something that requires an old R3 alpha...and the dialect is not 100% clean...guess I'm being kind of a Carl here...not ready for prime-time yet. |
BrianH 29-Jan-2010 [1941] | This is the best place we have now to discuss SSL on R3. |
Andreas 29-Jan-2010 [1942x2] | Fine with me |
How would I implement a ssl:// port scheme in the hostkit, that behaves just as tcp:// does, but allowing me to hook the native actors (open, mainly) | |
BrianH 29-Jan-2010 [1944] | The tcp:// scheme is defined in the host kit, as are all native schemes. |
Andreas 29-Jan-2010 [1945x2] | no, only the tcp device is defined in the hostkit |
how the device is wired up to the tcp:// scheme, is somewhere else | |
BrianH 29-Jan-2010 [1947] | That's all you need. The scheme is a stub. |
Andreas 29-Jan-2010 [1948x2] | And where is that stub? |
How is it wired to the tcp device? | |
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