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World: r3wp

[!REBOL3 Schemes] Implementors guide

Graham
25-Jan-2010
[1843x2]
A couple of prototype functions for Amazon SDB
http://rebol.wik.is/Rebol3/AWS
Successfully created a couple of domains, and then listed them.
Gregg
25-Jan-2010
[1845]
Nice Graham.
Graham
25-Jan-2010
[1846x4]
SOAP looks much easier to implement compared with the tricky stuff 
you have to do with REST.
I haven't looked at the other services for a while now, and don't 
think I ever looked at the SOAP api for S3, and SQS .. but I suspect 
it's very similar, and just point the URL to a different service
What would be nice would be a small tight library for dealing with 
basic XML
Not suggesting that anyone write an XSD parser!
Gregg
25-Jan-2010
[1850]
Start with simple, well-formed XML, and go from there.
Graham
25-Jan-2010
[1851]
I was wondering about TFTP but see that it is based on UDP .. oh 
well...
Andreas
25-Jan-2010
[1852]
TFTP is funny, I have a R2 TFTP server impl lying around, somewhere
Graham
25-Jan-2010
[1853]
There's also a get in the library http://www.rebol.org/view-script.r?script=tftp-get.r
Andreas
25-Jan-2010
[1854]
as well as a BOOTP server. also UDP, though
Graham
25-Jan-2010
[1855]
so the bootp is for a rebol os ?
Andreas
25-Jan-2010
[1856x2]
heh
bootp+tftp is sufficient to netboot some machines
Graham
26-Jan-2010
[1858]
http://msdn.microsoft.com/en-us/magazine/cc188797.aspx


DIME extension for SOAP ... dunno, doesn't seem as simple as they 
make out
Pekr
26-Jan-2010
[1859]
any revision to current schemes by Carl? Was supposed to be done 
... "overnight", no?
Graham
26-Jan-2010
[1860]
I haven't heard anything back
Graham
27-Jan-2010
[1861x5]
I see that Sun  has their cloud service though it is in beta testing. 
 They have a huge datacentre ... something like 3 football fields 
long ... dunno what sort of football though
They are using Webdav and also RESTful APIs similar to those from 
Amazon S3
Can't find any pricing information though ..
I managed to get SQS working using SOAP ( I create the message with 
r3 and then send it using r2 as it needs to be over https ).
But keep getting server errors when trying to work with S3
Got it working with S3 .. there's a bug in the Amazon Soap service 
for S3 which I uncovered !
Gregg
27-Jan-2010
[1866]
I assume you reported it to them. :-)
Graham
27-Jan-2010
[1867x2]
Yes, filled in their feedback form.
Updated the AWS stuff so that you can now create messages for S3, 
SQS, and SDB.
http://rebol.wik.is/Rebol3/AWS
BrianH
27-Jan-2010
[1869]
You should make it a module so the local vars get stored somewhere 
other than system/contexts/user/user. The word 'user is commonly 
used in scripts, and any one of those would break your code.
Graham
27-Jan-2010
[1870]
eh??
BrianH
27-Jan-2010
[1871x2]
system/contexts/user is the main context for user scripts. Like yours, 
for example.
So if a user script did user: "Graham" to a top-level variable in 
their script, your AWS script would break.
Graham
27-Jan-2010
[1873]
I'm using the full path .. how can it break?
BrianH
27-Jan-2010
[1874]
It is better to make your script a module, and use local vars to 
store that kind of thing.
Graham
27-Jan-2010
[1875x2]
If i make it a module I have to export everything anyway
oh ... dear
BrianH
27-Jan-2010
[1877x2]
Not everything.
Every user script (including the one you linked above) is bound to 
system/contexts/user by default. Modules aren't.
Graham
27-Jan-2010
[1879]
just protect user then ...
BrianH
27-Jan-2010
[1880]
Then you would break a lot of code. If you protect/hide 'user and 
then don't use the full path to access it, just direct word access, 
then subsequent user scripts that use 'user will use a new variable 
called 'user that isn't the same as yours.
Graham
27-Jan-2010
[1881]
So, if I set aside a couple of variables inside the module for these 
keys, how do I set them up automatically?
BrianH
27-Jan-2010
[1882]
In the module init code, or on first access, whatever.
Graham
27-Jan-2010
[1883]
So, are users supposed to initalize their email, passwords, proxies 
etc somewhere or each time they run a script?
BrianH
27-Jan-2010
[1884]
system/contexts/user is not initialized except by code. And "user" 
in this case doesn't refer to a person, but to a task.
Graham
27-Jan-2010
[1885]
Brilliant .. so where do we store such stuff?
BrianH
27-Jan-2010
[1886]
If you want to save prefs and then load them, cool.
Graham
27-Jan-2010
[1887]
So, every email script has their own prefs?
BrianH
27-Jan-2010
[1888x2]
We are still planning to add some common code to put preferences 
in %user.r, instead of the code that goes there in R2.
The trick is that %user.r would only contain preferences, not code. 
Putting code in a user-writeable script is not very secure.
Graham
27-Jan-2010
[1890]
so where do we put our aliases ...
BrianH
27-Jan-2010
[1891]
%rebol.r
Graham
27-Jan-2010
[1892]
Ok, so is there an exemplar module that does things as you describe?