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digitalmars.D - Pop3 connection with D

reply Roger <ruio hotmail.com> writes:
Hello i'm student of College of Engineering Informatics in Fribourg Switzerland.

For a semester project i want to create a E-mail client with D.

Anyone can help me to know how to create a pop3 and smtp connection with D?
I have searched a lot but i found only a dead reference:
http://www.digitalmars.com/d/archives/digitalmars/D/22349.html

Tanks a lot, bye, Roger
Mar 08 2007
next sibling parent reply BCS <BCS pathlink.com> writes:
Roger wrote:

 Hello i'm student of College of Engineering Informatics in Fribourg
Switzerland.
 
 For a semester project i want to create a E-mail client with D.
 
 Anyone can help me to know how to create a pop3 and smtp connection with D?
 I have searched a lot but i found only a dead reference:
 http://www.digitalmars.com/d/archives/digitalmars/D/22349.html
 
 Tanks a lot, bye, Roger


As with a lot of D you might (but not nessisaraly) have to roll your 
own. SMTP isn't that bad (I've used it by hand in telnet). I expect pop 
would be about the same. IIRC there /is/ a lib out there for SMTP.

If you feel "nerdy" enough you can just read the RFC's <G>

pop3
http://tools.ietf.org/html/rfc1939

SMTP
http://tools.ietf.org/html/rfc2821
Mar 08 2007
parent reply "Andrei Alexandrescu (See Website For Email)" <SeeWebsiteForEmail erdani.org> writes:
BCS wrote:

 Roger wrote:

 Hello i'm student of College of Engineering Informatics in Fribourg 
 Switzerland.

 For a semester project i want to create a E-mail client with D.

 Anyone can help me to know how to create a pop3 and smtp connection 
 with D?
 I have searched a lot but i found only a dead reference:
 http://www.digitalmars.com/d/archives/digitalmars/D/22349.html

 Tanks a lot, bye, Roger


 
 As with a lot of D you might (but not nessisaraly) have to roll your 
 own. SMTP isn't that bad (I've used it by hand in telnet). I expect pop 
 would be about the same. IIRC there /is/ a lib out there for SMTP.
 
 If you feel "nerdy" enough you can just read the RFC's <G>
 
 pop3
 http://tools.ietf.org/html/rfc1939
 
 SMTP
 http://tools.ietf.org/html/rfc2821


Possibly implementing protocols could be an area in which DSLs might 
help, e.g. in the guise of automata and of course regex. I once designed 
a little DSL for implementing FTP and it was of great help.

Andrei
Mar 08 2007
parent reply kris <foo bar.com> writes:
Andrei Alexandrescu (See Website For Email) wrote:

 Possibly implementing protocols could be an area in which DSLs might 
 help, e.g. in the guise of automata and of course regex. I once designed 
 a little DSL for implementing FTP and it was of great help.



Compile-time DSLs?
Mar 08 2007
parent reply "Andrei Alexandrescu (See Website For Email)" <SeeWebsiteForEmail erdani.org> writes:
kris wrote:

 Andrei Alexandrescu (See Website For Email) wrote:

 Possibly implementing protocols could be an area in which DSLs might 
 help, e.g. in the guise of automata and of course regex. I once 
 designed a little DSL for implementing FTP and it was of great help.


 
 
 Compile-time DSLs?


Obviously.

Andrei
Mar 08 2007
parent reply kris <foo bar.com> writes:
Andrei Alexandrescu (See Website For Email) wrote:

 kris wrote:
 

 Andrei Alexandrescu (See Website For Email) wrote:


 Possibly implementing protocols could be an area in which DSLs might 
 help, e.g. in the guise of automata and of course regex. I once 
 designed a little DSL for implementing FTP and it was of great help.




 Compile-time DSLs?


 
 
 Obviously.


That sounds reasonably sophisticated.

Just out of interest, how does one easily debug something like that?
Mar 08 2007
parent reply "Andrei Alexandrescu (See Website For Email)" <SeeWebsiteForEmail erdani.org> writes:
kris wrote:

 Andrei Alexandrescu (See Website For Email) wrote:

 kris wrote:


 Andrei Alexandrescu (See Website For Email) wrote:


 Possibly implementing protocols could be an area in which DSLs might 
 help, e.g. in the guise of automata and of course regex. I once 
 designed a little DSL for implementing FTP and it was of great help.




 Compile-time DSLs?



 Obviously.


 
 That sounds reasonably sophisticated.
 
 Just out of interest, how does one easily debug something like that?


Very easy. The FTP protocol is described as a collection of states with 
prescribed transitions in between them. A DFA (in C++) implemented them 
in a compact manner; whenever the DFA would bail out (by throwing), it 
would tell what state it was in, what was the expected input, and what 
the actual input was. I remember that library was a rewrite of a library 
written in a "old school" style from first principles (e.g. int and if 
and switch), meaning that following what the code does and where you are 
was horrendous. We were very pleased with the rewrite.


Andrei
Mar 08 2007
parent reply kris <foo bar.com> writes:
Andrei Alexandrescu (See Website For Email) wrote:

 kris wrote:
 

 Andrei Alexandrescu (See Website For Email) wrote:


 kris wrote:


 Andrei Alexandrescu (See Website For Email) wrote:


 Possibly implementing protocols could be an area in which DSLs 
 might help, e.g. in the guise of automata and of course regex. I 
 once designed a little DSL for implementing FTP and it was of great 
 help.





 Compile-time DSLs?




 Obviously.



 That sounds reasonably sophisticated.

 Just out of interest, how does one easily debug something like that?


 
 
 Very easy. The FTP protocol is described as a collection of states with 
 prescribed transitions in between them. A DFA (in C++) implemented them 
 in a compact manner; whenever the DFA would bail out (by throwing), it 
 would tell what state it was in, what was the expected input, and what 
 the actual input was. I remember that library was a rewrite of a library 
 written in a "old school" style from first principles (e.g. int and if 
 and switch), meaning that following what the code does and where you are 
 was horrendous. We were very pleased with the rewrite.
 
 
 Andrei


sounds good.

Yet, you appear to be describing a "black-box" of sorts, with diagnostic 
exceptions? My guess is that interactive "step through" debugging, with 
something like MSVC6 for example, would not be particularly feasible?
Mar 08 2007
parent reply "Andrei Alexandrescu (See Website For Email)" <SeeWebsiteForEmail erdani.org> writes:
kris wrote:

 Andrei Alexandrescu (See Website For Email) wrote:

 kris wrote:


 Andrei Alexandrescu (See Website For Email) wrote:


 kris wrote:


 Andrei Alexandrescu (See Website For Email) wrote:


 Possibly implementing protocols could be an area in which DSLs 
 might help, e.g. in the guise of automata and of course regex. I 
 once designed a little DSL for implementing FTP and it was of 
 great help.





 Compile-time DSLs?




 Obviously.



 That sounds reasonably sophisticated.

 Just out of interest, how does one easily debug something like that?



 Very easy. The FTP protocol is described as a collection of states 
 with prescribed transitions in between them. A DFA (in C++) 
 implemented them in a compact manner; whenever the DFA would bail out 
 (by throwing), it would tell what state it was in, what was the 
 expected input, and what the actual input was. I remember that library 
 was a rewrite of a library written in a "old school" style from first 
 principles (e.g. int and if and switch), meaning that following what 
 the code does and where you are was horrendous. We were very pleased 
 with the rewrite.


 Andrei


 
 sounds good.
 
 Yet, you appear to be describing a "black-box" of sorts, with diagnostic 
 exceptions? My guess is that interactive "step through" debugging, with 
 something like MSVC6 for example, would not be particularly feasible?


Stepping through was of course possible and useful. The main difference 
was that stepping through manually-written code was replaced by stepping 
through the more compact templated code. The instantiation types are 
different and therefore different actual binary code maps to the same 
source line.

Andrei
Mar 08 2007
parent reply Sean Kelly <sean f4.ca> writes:
Andrei Alexandrescu (See Website For Email) wrote:

 
 Stepping through was of course possible and useful. The main difference 
 was that stepping through manually-written code was replaced by stepping 
 through the more compact templated code. The instantiation types are 
 different and therefore different actual binary code maps to the same 
 source line.


It sounds like you're describing debugging C++ template code.  Would the 
same thing be possible with code generated from strings in D via mixin? 
  I suppose the compiler could output source files to pair with the 
object files, but beyond that I don't see how this could be done.


Sean
Mar 08 2007
next sibling parent reply "Andrei Alexandrescu (See Website For Email)" <SeeWebsiteForEmail erdani.org> writes:
Sean Kelly wrote:

 Andrei Alexandrescu (See Website For Email) wrote:

 Stepping through was of course possible and useful. The main 
 difference was that stepping through manually-written code was 
 replaced by stepping through the more compact templated code. The 
 instantiation types are different and therefore different actual 
 binary code maps to the same source line.


 
 It sounds like you're describing debugging C++ template code.  Would the 
 same thing be possible with code generated from strings in D via mixin? 
  I suppose the compiler could output source files to pair with the 
 object files, but beyond that I don't see how this could be done.


Shriram Krishnamurthi has done work on macros that allow traceability 
back to the source code of the macro, but probably that won't be doable 
for string-generated code.

We need to devise a solution to that; for example, for each file blah.d 
that contains mixins, the compiler could automatically generate 
blah.d.expanded and make debugging info point into that file.


Andrei
Mar 08 2007
parent BCS <BCS pathlink.com> writes:
Andrei Alexandrescu (See Website For Email) wrote:

 Sean Kelly wrote:
 

 Andrei Alexandrescu (See Website For Email) wrote:


 Stepping through was of course possible and useful. The main 
 difference was that stepping through manually-written code was 
 replaced by stepping through the more compact templated code. The 
 instantiation types are different and therefore different actual 
 binary code maps to the same source line.



 It sounds like you're describing debugging C++ template code.  Would 
 the same thing be possible with code generated from strings in D via 
 mixin?  I suppose the compiler could output source files to pair with 
 the object files, but beyond that I don't see how this could be done.


 
 
 Shriram Krishnamurthi has done work on macros that allow traceability 
 back to the source code of the macro, but probably that won't be doable 
 for string-generated code.
 
 We need to devise a solution to that; for example, for each file blah.d 
 that contains mixins, the compiler could automatically generate 
 blah.d.expanded and make debugging info point into that file.
 
 
 Andrei


Assuming somthing like my dparse is used, another choice is to, inside 
of the static foreaches put in a debug block that assigns the values of 
the template variables to local variables then you can look at them in 
the debugger and figure out what state you are in.

I /realy/ need to get a debugger and see what happens when I step 
throught some of this stuff. <G>
Mar 08 2007
prev sibling parent janderson <askme me.com> writes:
Sean Kelly wrote:

 Andrei Alexandrescu (See Website For Email) wrote:

 Stepping through was of course possible and useful. The main 
 difference was that stepping through manually-written code was 
 replaced by stepping through the more compact templated code. The 
 instantiation types are different and therefore different actual 
 binary code maps to the same source line.


 
 It sounds like you're describing debugging C++ template code.  Would the 
 same thing be possible with code generated from strings in D via mixin? 
  I suppose the compiler could output source files to pair with the 
 object files, but beyond that I don't see how this could be done.
 
 
 Sean


Its the same with any DSL compile-time or not.  You simply need to crate 
your own system to do it.  Most DSLs I've used (lua, shader lanaguages, 
script languages, xml) have done that.  Its not difficult.  It would be 
nice if the DSL helper library had some helpers for it though.

-Joel
Mar 08 2007
prev sibling next sibling parent Lars Ivar Igesund <larsivar igesund.net> writes:
Roger wrote:


 Hello i'm student of College of Engineering Informatics in Fribourg
 Switzerland.
 
 For a semester project i want to create a E-mail client with D.
 
 Anyone can help me to know how to create a pop3 and smtp connection with
 D? I have searched a lot but i found only a dead reference:
 http://www.digitalmars.com/d/archives/digitalmars/D/22349.html
 
 Tanks a lot, bye, Roger


There is a Pop3 client in Tango's patches directory which is likely to be
included in a later release. We hope to get smtp too, but it's further
away.

-- 
Lars Ivar Igesund
blog at http://larsivi.net
DSource, #d.tango & #D: larsivi
Dancing the Tango
Mar 08 2007
prev sibling next sibling parent Alan Knowles <alan akbkhome.com> writes:
This may get you started..
Main Sending Code
http://www.akbkhome.com/svn/team/dinc/src/dinc/deliver/Smtp.d
MX Lookup code
http://www.akbkhome.com/svn/team/dinc/src/dinc/deliver/MxRecord.d
Usage Example.
http://www.akbkhome.com/svn/team/dinc/src/dinc/deliver/External.d

Regards
Alan

Roger wrote:

 Hello i'm student of College of Engineering Informatics in Fribourg
Switzerland.
 
 For a semester project i want to create a E-mail client with D.
 
 Anyone can help me to know how to create a pop3 and smtp connection with D?
 I have searched a lot but i found only a dead reference:
 http://www.digitalmars.com/d/archives/digitalmars/D/22349.html
 
 Tanks a lot, bye, Roger
Mar 08 2007
prev sibling parent "Unknown W. Brackets" <unknown simplemachines.org> writes:
POP3 really isn't very complicated.  I've written clients for POP3 and 
SMTP (not in D) and it's really just a matter of following the RFCs. 
They're all command based so it's really just a matter of parsing the 
responses.

In fact, it wouldn't be that hard to adapt an existing FTP or SMTP 
implementation to POP3.  FTP is definitely much more complicated.

-[Unknown]



 Hello i'm student of College of Engineering Informatics in Fribourg
Switzerland.
 
 For a semester project i want to create a E-mail client with D.
 
 Anyone can help me to know how to create a pop3 and smtp connection with D?
 I have searched a lot but i found only a dead reference:
 http://www.digitalmars.com/d/archives/digitalmars/D/22349.html
 
 Tanks a lot, bye, Roger
Mar 08 2007