- send email and socket programming - 15 Updates
- C++ needs some help - 8 Updates
- (poll) invent, rebuild and rest - 1 Update
- OT: Association for Orthodox Jewish Scientists - 1 Update
| alexo <alelvb@inwind.it>: Feb 14 06:01PM +0100 Hello group, I've written for UNIX a little program [FLTK] that needs to send an order through e-mail. I'm absolutely new to socket programming so you are my first attempt. In a couple of tutorials I've built a pair of toy client/server programs that showed me how to use sockets. It seems not so hard to program them, but I need some help and infos. My program is intended to be a stand alone program with a send button. When the user hits the send button I'd like it (the program) sends an email to my email address with the order message in it. I know that SMTP port is 25, but I don't know how to configure the aspects required. Could you please guide me through that, or could you link me to a clear intro of the subject? My program, as already said, is written for Linux, but I'll later convert it to Windows where it is intended to run. Conversion of the GUI part is not necessary since FLTK is a cross-platform graphic library, but socket programming is dependent on architecture. The functions to invoke are of course different, and I'll appreciate it so much if you could explain how to send email from a C/C++ program using TCP/IP o SMTP for both linux and windows. thank you alexo |
| JiiPee <no@notvalid.com>: Feb 14 05:07PM I did that in my email project back in 2000 in a software company I was working. I used a ready made class for doing that. Why not use a classes/libraries to do it, why invent the weel again? Or is this more like a learning process? That class I used worked very nicely and might be even better now. On 14/02/2016 17:01, alexo wrote: |
| JiiPee <no@notvalid.com>: Feb 14 05:12PM If I remember correctly, it was actually this one: http://www.codesink.org/mimetic_mime_library.html#intro anyway, that looks something I was using On 14/02/2016 17:07, JiiPee wrote: |
| Paavo Helde <myfirstname@osa.pri.ee>: Feb 14 07:18PM +0200 On 14.02.2016 19:01, alexo wrote: > In a couple of tutorials I've built a pair of toy client/server programs > that showed me how to use sockets. It seems not so hard to program them, > but I need some help and infos. In C++, when working with sockets I would strongly recommend using a cross-platform library or framework for that, otherwise you will never get the hairy platform-specific tricks correct. Boost asio is an example of such a good library, probably there are others. ASIO mean async i/O, it might be you don't need its asynchronous capabilities in the beginning, so you can ignore them, the rest of the library still does much work for you. Just look up the examples and build on top of them. |
| "Öö Tiib" <ootiib@hot.ee>: Feb 14 09:39AM -0800 On Sunday, 14 February 2016 19:01:29 UTC+2, alexo wrote: > aspects required. > Could you please guide me through that, or could you link me to a clear > intro of the subject? Why you use e-mail? There can be SSL/TLS connection made between SMTP, IMAP or POP3 server and client but lot of servers do not do even that, instead ask for authentication as open text. There also are no guarantee any further, so e-mail can travel between servers as open text anyway. So it is basically only worthless spam that can be sent by e-mail. |
| alexo <alelvb@inwind.it>: Feb 14 07:44PM +0100 Il 14/02/2016 18:07, JiiPee ha scritto: > Why not use a classes/libraries to do it, why invent the weel again? Or is this more > like a learning process? That class I used worked very nicely and might > be even better now. I didn't know there were these opportunities. I Think I'll study a bit how socket programming works behind the scenes. Thank you |
| woodbrian77@gmail.com: Feb 14 10:47AM -0800 On Sunday, February 14, 2016 at 11:01:29 AM UTC-6, alexo wrote: > C/C++ program using TCP/IP o SMTP for both linux and windows. > thank you > alexo I've written some software that supports sending messages over sockets on Linux, Windows and other operating systems. There's a library available here: http://webEbenezer.net/build_integration.html Feel free to use the library in your project. I also have an on line code generator called the C++ Middleware Writer (CMW) that might be helpful. I'm willing to donate 16 hours/week for six months to a project that uses the CMW. Also we'll pay $1,400 and give a $1,200 investment in the company to someone who helps us find someone interested in this offer. We'll pay the $1,400 after working for four months on the project. Ebenezer Enterprises works to reward investments to 3 times the original amount. So the investment would result in between $0 and $3,600, depending on how things go for the company. Brian Ebenezer Enterprises - In G-d we trust. http://webEbenezer.net |
| Paavo Helde <myfirstname@osa.pri.ee>: Feb 14 09:19PM +0200 On 14.02.2016 19:01, alexo wrote: > My program is intended to be a stand alone program with a send button. > When the user hits the send button I'd like it (the program) sends an > email to my email address with the order message in it. On a second thought, why do you need sockets at all? If you just want the program to send you an order by e-mail, you could just open an URL like mailto:yourname@example.com?subject=Order&body=Order%20details%20here In Windows, this should be passed to the ShellExecute SDK function. In Linux I guess there is no 100% sure way, but xdg-email ought to work in most environments. This would also give the user an opportunity to review the order and add additional comments. |
| alexo <alelvb@inwind.it>: Feb 14 08:23PM +0100 Il 14/02/2016 18:39, Öö Tiib ha scritto: > Why you use e-mail? This was the first and simplest idea I got. Otherwise I had to implement a server and it is up to now out of my reach. > IMAP or POP3 server and client but lot of servers do not do even that, > instead ask for authentication as open text. There also are no guarantee > any further, so e-mail can travel between servers as open text anyway. SSL/TLS is another thing should I have to learn? No thank you, I'm not other than a hobbist. That's too much for what I'm trying to do. Thank you anyway. |
| alexo <alelvb@inwind.it>: Feb 14 08:29PM +0100 Il 14/02/2016 20:19, Paavo Helde ha scritto: > On a second thought, why do you need sockets at all? If you just want > the program to send you an order by e-mail, you could just open an URL like > mailto:yourname@example.com?subject=Order&body=Order%20details%20here The software I intend to use formats the info of the order sent in a way easy to intellect. My clients are too lazy to compile a form from their own with all the infos formatted in a readable way. |
| Ian Collins <ian-news@hotmail.com>: Feb 15 08:40AM +1300 alexo wrote: > aspects required. > Could you please guide me through that, or could you link me to a clear > intro of the subject? Your issue isn't socket programming, it is how to use SMTP! You need a configured SMTP server to interact with and you need to know how to do this. > architecture. The functions to invoke are of course different, and I'll > appreciate it so much if you could explain how to send email from a > C/C++ program using TCP/IP o SMTP for both linux and windows. Using winsock on Windows is almost identical to using sockets on a POSIX system. -- Ian Collins |
| "Chris M. Thomasson" <nospam@nospam.nospam>: Feb 14 12:09PM -0800 > "Ian Collins" wrote in message news:dic3gqFqc0vU5@mid.individual.net... [...] > Using winsock on Windows is almost identical to using sockets on a POSIX > system. FWIW, on Windows wrt winsock I use IOCP via "batched" dequeuing: https://msdn.microsoft.com/en-us/library/windows/desktop/aa364988(v=vs.85).aspx Is there a direct Linux alternative? I guess Kernel async io: http://lse.sourceforge.net/io/aio.html or (epoll): http://davmac.org/davpage/linux/async-io.html#epoll ? |
| Paavo Helde <myfirstname@osa.pri.ee>: Feb 14 10:29PM +0200 On 14.02.2016 21:29, alexo wrote: > easy to intellect. > My clients are too lazy to compile a form from their own with all the > infos formatted in a readable way. I guess you overlooked the body field in the URL. |
| Jerry Stuckle <jstucklex@attglobal.net>: Feb 14 04:04PM -0500 On 2/14/2016 12:01 PM, alexo wrote: > C/C++ program using TCP/IP o SMTP for both linux and windows. > thank you > alexo Just beware that nowadays many ISP's are blocking outbound connections to port 25 to prevent spam (often due to viruses and/or trojan horses. This is especially true for residential connections. -- ================== Remove the "x" from my email address Jerry Stuckle jstucklex@attglobal.net ================== |
| jt@toerring.de (Jens Thoms Toerring): Feb 14 09:20PM > aspects required. > Could you please guide me through that, or could you link me to a clear > intro of the subject? This rather likely won't work, even if you get everything right. There are the following issues: a) You need to figure out the mail server for the address you want to send the email to. Many machines don't accept connections on port 25 (or there's a firewall that prevents accessing the port from the outside). You need to know the mail server for the recipients domain. To get that you must do an DNS query for the MX server of the destination domain. b) Once you got the socket opened to that mail server you need to understand the SMTP protocol to talk correctly to the server and transfer the message. c) While a and b can be done (though it requires quite a bit of reading the corresponding RFCs) the killer is that most mail servers nowadays don't accept mail from random machines but only from the dedicated mail servers from the domain the email is coming from. So unless the machine sending the mail is marked in DNS as a mail server for the domain (i.e., has an MX record) the mail won't get accepted. d) And, if you want to talk to your own mail server to get it to pass on the email on, many don't accept emails anymore without encryption, so you also beed to know how to deal with SSL/TLS. On a UNIX system you'd better install and properly configure a MTA (mail transport agent) that passes on the email to the mail server for the senders domain that then forwards it to the correct mail server on the receiving end. This typically is done by spawning the 'sendmail' program (but which often is a symbolic link to the actual MTA installed on the machine) and let it deal with the details of handling the mail. The nice old times when you could send out an email to your boss, looking to the uninitiated as coming from 'god@heaven', are, thanks to spam, over since a number of years. If there's no usable MTA on the machine you intend to send mails from you're screwed. And, sorry, no idea how to do it under Windows... Regards, Jens -- \ Jens Thoms Toerring ___ jt@toerring.de \__________________________ http://toerring.de |
| woodbrian77@gmail.com: Feb 14 07:09AM -0800 > > Would others like to join me in making suggestions on how > > to change that page? As Geoff mentioned, the order could > > be alphabetical. That would be okay with me. Are there some who would like to see the Java description reduced a lot? If some insist on leaving the long Java description, I think it should be moved to after the C++ description. Brian Ebenezer Enterprises - In G-d we trust. http://webEbenezer.net |
| Daniel <danielaparker@gmail.com>: Feb 14 08:26AM -0800 > reduced a lot? If some insist on leaving the long Java > description, I think it should be moved to after the C++ > description. Hi Brian, I see you've added to the C++ section: "C++ Middleware Writer automates the creation of serialization functions." I think that puts you in the category of people that Wikipedia describes as "Clearly not being here to build an encyclopedia" by virtue of "Narrow self-interest and/or promotion of themselves or their business". So: you should either provide a reference to a book or article from a third party source that discusses the Middleware Writer in the context of C++ serialization, or delete that text. Daniel |
| Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk>: Feb 14 04:37PM On 14/02/2016 16:26, Daniel wrote: > Hi Brian, > I see you've added to the C++ section: "C++ Middleware Writer automates the creation of serialization functions." I think that puts you in the category of people that Wikipedia describes as "Clearly not being here to build an encyclopedia" by virtue of "Narrow self-interest and/or promotion of themselves or their business". > So: you should either provide a reference to a book or article from a third party source that discusses the Middleware Writer in the context of C++ serialization, or delete that text. I have removed the advertisement from that Wikipedia article. Brian: you cannot re-add it as doing so is a conflict of interest. /Flibble |
| "Öö Tiib" <ootiib@hot.ee>: Feb 14 09:12AM -0800 On Sunday, 14 February 2016 18:37:56 UTC+2, Mr Flibble wrote: > > So: you should either provide a reference to a book or article from a third party source that discusses the Middleware Writer in the context of C++ serialization, or delete that text. > I have removed the advertisement from that Wikipedia article. Brian: > you cannot re-add it as doing so is a conflict of interest. Good. However he was correct that the Java is oddly large brick of nausea there. One issue is that lot of Java is about technical details how it works and what developer can do: |> Primitives as well as non-transient, non-static referenced objects |> are encoded into the stream. Each object that is referenced by the |> serialized object and not marked as transient must also be serialized; |> and if any object in the complete graph of non-transient object |> references is not serializable, then serialization will fail. The |> developer can influence this behavior by marking objects as transient, |> or by redefining the serialization for an object so that some portion |> of the reference graph is truncated and not serialized. Who cares? That sounds rather uninteresting, read the manual if it concerns you. Other portion of Java is explaining something that is not somehow related to Java. It basically tells that: Q: Why some objects in a program *written* *in* *whatever* *language* do not make sense to serialize without special additional effort by programmer taken? A: Three main reasons: 1) Not all runtime objects capture useful information for serialized state. There are lot of such objects like resource handles, file descriptors, threads, sockets and synchronization primitives of underlying platform that can not be used if deserialized. 2) Software evolves over time and so does the data but different version of same software are often in use side-by-side. Achieving compatibility between versions requires additional efforts. 3) Lot of runtime objects contain sensitive or confidential data and serializing such data needs special security precautions taken by programmer if it is needed. |
| Gareth Owen <gwowen@gmail.com>: Feb 14 05:18PM > I have removed the advertisement from that Wikipedia article. Brian: > you cannot re-add it as doing so is a conflict of interest. I did that once too. He put it back the next day. |
| Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk>: Feb 14 05:27PM On 14/02/2016 17:18, Gareth Owen wrote: >> I have removed the advertisement from that Wikipedia article. Brian: >> you cannot re-add it as doing so is a conflict of interest. > I did that once too. He put it back the next day. Yeah, I noticed. :) Houston, we have a problem. /Flibble |
| "Alf P. Steinbach" <alf.p.steinbach+usenet@gmail.com>: Feb 14 09:14PM +0100 > So far G-d has helped us. > http://webEbenezer.net Well you (apparently, and I can't think who else) have also put a reference to your software in Wikipedia. That's a sin, and I'm editing it to remove that reference, as already two others here have done. References to your work will appear in Wikipedia if or when it's deserved: it's not your job to put them there, and you're very wrong to do so. Cheers & hth., - Alf |
| woodbrian77@gmail.com: Feb 14 01:18PM -0800 Privacy and private property are under attack here. Those who attack a man's efforts to make an honest living with his hands have problems. Brian Ebenezer Enterprises - "At my first defense no one supported me, but all deserted me; may it not be counted against them. But the L-rd stood with me and strengthened me, so that through me the proclamation might be fully accomplished, and that all the Gentiles might hear; and I was rescued out of the lion's mouth. The L-rd will rescue me from every evil deed, and will bring me safely to His heavenly kingdom; to Him be the glory forever and ever." 2nd Timothy 4 http://webEbenezer.net |
| Prroffessorr Fir Kenobi <profesor.fir@gmail.com>: Feb 14 12:01PM -0800 maybe this is not much good question (small one) but a i had nothing much better i may state it personally when working i noticed i work in those three 'phases' most creative is invent phase when i code new things, that i was not doing yet before then i usually (always) need rest [unfortunatelly im not the one who could code constantly, often must rest quite heavily tu run further ] then i also often feel need to rebuild the things i was invented (coded/tried) before, Fun thing is maybe as the codebase (set of already invented things) is larger then the rebuild 'phase' may grow bigger (as i need to maintain/manage the bigger set - this is though somewhat aproximate vision im not sure if its true) I also need read/study a lot, but this point i may include in rest phase.. The question is: can you answer how much/how big amount of your work time are consuming by those three phases, I mean like in percent of time (like a days or weeks in a year)? How much % is resting/studying, How much % is rebuilding, how much % is creative inventing/implementing ? |
| woodbrian77@gmail.com: Feb 14 08:46AM -0800 The Association for Orthodox Jewish Scientists is meeting this weekend. http://www.aojs.org/ They have existed for over 60 years. I wonder if there are any computer scientists in the group. :) Brian Ebenezer Enterprises - So far G-d has helped us. http://webEbenezer.net |
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