BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  HTTP + Proxy - Anyone tried it in Delphi? Goto page 1, 2, 3  Next          BorlandTalk.com Forum Index -> Delphi Internet Winsock View previous topic :: View next topic   Author Message Alan Garny Guest Posted: Mon Jan 12, 2004 8:46 pm    Post subject: HTTP + Proxy - Anyone tried it in Delphi? Ok, I have been battling for quite some time for using TIdHTTP from behind a proxy server. I don't seem to get it to work (keep getting that annoying "HTTP/1.1 407 Proxy Authentication Required"), despite what I think is a valid code (see my other message). This would therefore confirm what I have seen in other messages, i.e. there is something broken with TIdHTTP using a proxy server. Now, the question is to know whether someone: 1) has actually managed to use TIdHTTP with a proxy and if so, what did you have to do? I am happy to admit I made a mistake, but for that I need someone who shows me I have made one... :) 2) has given up on using TIdHTTP with a proxy and, if so, what other solution s/he has decided to use instead, keeping in mind I need a free solution (my project is open source). Cheers, Alan. Back to top Alan Garny Guest Posted: Mon Jan 12, 2004 8:50 pm    Post subject: Re: HTTP + Proxy - Anyone tried it in Delphi? "Ben Hochstrasser [FF]" <bhoc@tiscali123^H^H^H.ch> wrote Quote: Alan Garny wrote: Now, the question is to know whether someone: What style of authentication does your proxy expect? Plain text? "Integrated" (aka NTLM) authentication? Some other method? I don't know and I am not sure it should matter. I mean that in the worst case, the user should be allowed to specify which method is to be used, no? Ideally, it would be determined automatically. Either way, I don't know how to do that... so if you know, I would be more than happy to learn from you... Alan. Back to top CleverComponents Team Guest Posted: Mon Jan 12, 2004 9:49 pm    Post subject: Re: HTTP + Proxy - Anyone tried it in Delphi? Dear Alan, Please try Clever Internet Suite v 3.3 at http://www.clevercomponents.com/downloads/inetsuite.asp - it perfectly compatible with proxy (including NTLM proxy authentification) Other Clever Internet Suite links: - Home Page http://clevercomponents.com/products/inetsuite/suite.asp - Downloads http://clevercomponents.com/downloads/inetsuite.asp - Compiled Demos http://clevercomponents.com/downloads/inetsuite.asp - Online Demos http://clevercomponents.com/products/inetsuite/demos.asp - History http://clevercomponents.com/products/inetsuite/suitehistory.asp - FAQ http://clevercomponents.com/products/inetsuite/inetsuitefaqs.asp With Best Regards, Clever Components Team http://www.clevercomponents.com "Alan Garny" <someone (AT) somewhere (DOT) com> wrote Quote: Ok, I have been battling for quite some time for using TIdHTTP from behind a proxy server. I don't seem to get it to work (keep getting that annoying "HTTP/1.1 407 Proxy Authentication Required"), despite what I think is a valid code (see my other message). This would therefore confirm what I have seen in other messages, i.e. there is something broken with TIdHTTP using a proxy server. Now, the question is to know whether someone: 1) has actually managed to use TIdHTTP with a proxy and if so, what did you have to do? I am happy to admit I made a mistake, but for that I need someone who shows me I have made one... :) 2) has given up on using TIdHTTP with a proxy and, if so, what other solution s/he has decided to use instead, keeping in mind I need a free solution (my project is open source). Cheers, Alan. Back to top Alan Garny Guest Posted: Mon Jan 12, 2004 10:07 pm    Post subject: Re: HTTP + Proxy - Anyone tried it in Delphi? "CleverComponents Team" <info (AT) CleverComponents (DOT) com> wrote Quote: Please try Clever Internet Suite v 3.3 at http://www.clevercomponents.com/downloads/inetsuite.asp - it perfectly compatible with proxy (including NTLM proxy authentification) Too bad, I said a free solution (and with source code, in fact)... and there is no way around that... Alan. Back to top Remy Lebeau (TeamB) Guest Posted: Mon Jan 12, 2004 10:25 pm    Post subject: Re: HTTP + Proxy - Anyone tried it in Delphi? "Alan Garny" <someone (AT) somewhere (DOT) com> wrote Quote: I don't know and I am not sure it should matter. Yes, it makes a BIG difference. Different authentication schemes encode the login info that is sent to the proxy in VERY different ways. You must know the exact authentication scheme that the proxy is actually using so that you can then configure TIdHTTP to login to the proxy in the correct manner. Quote: I mean that in the worst case, the user should be allowed to specify which method is to be used, no? Yes, but then you have to actually set up the TIdHTTP accordingly. Quote: Ideally, it would be determined automatically. For TIdHTTP to do that, you need to add the various TIdAuthentication... units (TIdAuthenticationDigest, TIdAuthenticationNTLM, TIdAuthenticationSSPI) to your programs' 'uses' clause. Even then, that is not a guarantee that everything will be handled automatically 100% for you. You will probably still have to interact with the values a little bit. Gambit Back to top Alan Garny Guest Posted: Mon Jan 12, 2004 10:35 pm    Post subject: Re: HTTP + Proxy - Anyone tried it in Delphi? "Remy Lebeau (TeamB)" <gambit47.no.spam (AT) no (DOT) spam.yahoo.com> wrote Quote: "Alan Garny" <someone (AT) somewhere (DOT) com> wrote in message news:400308c2 (AT) newsgroups (DOT) borland.com... I don't know and I am not sure it should matter. Yes, it makes a BIG difference. Different authentication schemes encode the login info that is sent to the proxy in VERY different ways. You must know the exact authentication scheme that the proxy is actually using so that you can then configure TIdHTTP to login to the proxy in the correct manner. That, I agree with. Quote: I mean that in the worst case, the user should be allowed to specify which method is to be used, no? Yes, but then you have to actually set up the TIdHTTP accordingly. Yes, how do we do that then? Quote: Ideally, it would be determined automatically. For TIdHTTP to do that, you need to add the various TIdAuthentication... units (TIdAuthenticationDigest, TIdAuthenticationNTLM, TIdAuthenticationSSPI) to your programs' 'uses' clause. Even then, that is not a guarantee that everything will be handled automatically 100% for you. You will probably still have to interact with the values a little bit. Adding the units is ok, but what next? Surely, to add them alone won't do the trick, right? Man, what a mess! Sorry, but I am really getting disappointed with that TIdHTTP component. There are programs that only require the information I ask my user to go through a proxy, so why can't I do the same? Surely, it must be possible! No?? Alan. PS: it sounds to me like nobody has ever managed to use TIdHTTP with a proxy server. If I am wrong, please show me some code! Until that proxy thing, I thought the Indy components were great, but now that one of my users is behind a proxy and cannot access my web site, I think they s*ck big time! Yes, that's the end of the day, so I guess I am getting a bit tired and easy to upset... Back to top Ben Hochstrasser [FF] Guest Posted: Mon Jan 12, 2004 11:38 pm    Post subject: Re: HTTP + Proxy - Anyone tried it in Delphi? Alan Garny wrote: Quote: Too bad, I said a free solution (and with source code, in fact)... and there is no way around that... Synapse. Reportedly (did it myself) works with proxy. Do you have to log on to your proxy with MSIE? No? Then you're using SSPI or NTLM, else you probably use Basic (aka clear text) authentication. -- Ben Back to top Remy Lebeau (TeamB) Guest Posted: Tue Jan 13, 2004 12:03 am    Post subject: Re: HTTP + Proxy - Anyone tried it in Delphi? "Alan Garny" <someone (AT) somewhere (DOT) com> wrote Quote: Yes, how do we do that then? Use the ProxyParams.Authentication property. You set it to the class instance of the particular authentication scheme to use, and then fill in that instance accordingly. Quote: Adding the units is ok, but what next? Surely, to add them alone won't do the trick, right? Yes, it would. Each unit has a RegisterAuthenticationMethod() call in its Initialization section. TIdHTTP can then look at the server's initial connection response to see what kind of authentication it is expecting, then it can look through the currently registered TIdAuthentication classes for a match, and if found then use it. Quote: Man, what a mess! Sorry, but I am really getting disappointed with that TIdHTTP component. This has nothing to do with TIdHTTP specifically. You need to understand how HTTP authentication works in general to begin with, then you will begin to understand why TIdHTTP is designed the way it is. Keep in mind that everything in Indy is designed with scalability and flexibility in mind, so things are generalized alot. Quote: There are programs that only require the information I ask my user to go through a proxy Such programs are most likely setup to either 1) only work with specific types of authentications, or 2) they are written to work with ALL authentication types and then automatically pick which ones to use sothat the user never knows what is going on. Indy is the latter, except that everything is modularized and those modules are not all enabled by default, it would bloat the component too much for everyone else who just need basic HTTP services. If you want advanced features, like proxying, you simply plugin in the extra pieces that are needed, configure them, and off you go. Quote: PS: it sounds to me like nobody has ever managed to use TIdHTTP with a proxy server. I doubt that very much. TIdHTTP has had proxy support for a long time. If nobody were having any luck with it at all, there would have been a lot more bug reports, and a lot more attention focused on it. Gambit Back to top Alan Garny Guest Posted: Tue Jan 13, 2004 12:50 am    Post subject: Re: HTTP + Proxy - Anyone tried it in Delphi? "Remy Lebeau (TeamB)" <gambit47.no.spam (AT) no (DOT) spam.yahoo.com> wrote Quote: "Alan Garny" <someone (AT) somewhere (DOT) com> wrote in message news:4003214f$3 (AT) newsgroups (DOT) borland.com... Adding the units is ok, but what next? Surely, to add them alone won't do the trick, right? Yes, it would. Each unit has a RegisterAuthenticationMethod() call in its Initialization section. TIdHTTP can then look at the server's initial connection response to see what kind of authentication it is expecting, then it can look through the currently registered TIdAuthentication classes for a match, and if found then use it. I just had a look at them and indeed... except that the Digest authentication method is untested (dixit a comment by Doychin Bondzhev in the code) and that the call to "RegisterAuthenticationMethod" in the initialization section is commented out... so, that leaves me the basic and NTLM authentication to play with... Quote: Man, what a mess! Sorry, but I am really getting disappointed with that TIdHTTP component. This has nothing to do with TIdHTTP specifically. You need to understand how HTTP authentication works in general to begin with, then you will begin to understand why TIdHTTP is designed the way it is. Keep in mind that everything in Indy is designed with scalability and flexibility in mind, so things are generalized alot. Yes, I start seeing that... still the documentation is not very helpful... not to mention that in my copy of D7, there is no Indy demo. Fair enough there is a file that points to their web site, so I went there... but nothing... unless I didn't look in the right place... Quote: There are programs that only require the information I ask my user to go through a proxy Such programs are most likely setup to either 1) only work with specific types of authentications, or 2) they are written to work with ALL authentication types and then automatically pick which ones to use sothat the user never knows what is going on. Indy is the latter, except that everything is modularized and those modules are not all enabled by default, or tested for that matter... <g> Quote: it would bloat the component too much for everyone else who just need basic HTTP services. If you want advanced features, like proxying, you simply plugin in the extra pieces that are needed, configure them, and off you go. That's fair enough. As it happens, I like that kind of approach. It's just not very clear at first glance. Quote: PS: it sounds to me like nobody has ever managed to use TIdHTTP with a proxy server. I doubt that very much. TIdHTTP has had proxy support for a long time. If nobody were having any luck with it at all, there would have been a lot more bug reports, and a lot more attention focused on it. Well, as I said I did spend quite a bit of time, before posting here, looking for a solution in the archives, but was more than unsuccessful. Again, I am more than happy to be proven wrong... but so far, everything seems to prove me right... unfortunately... This said, I will, whenever I have a bit of time (this whole TIdHTTP+Proxy issue has already taken far too much of my limited free time) have a proper look at that authentication property, even thought the digest method doesn't seem reliable as it stands (for it hasn't been tested). Alan. Back to top Remy Lebeau (TeamB) Guest Posted: Tue Jan 13, 2004 2:28 am    Post subject: Re: HTTP + Proxy - Anyone tried it in Delphi? "Alan Garny" <someone (AT) somewhere (DOT) com> wrote Quote: I just had a look at them and indeed... except that the Digest authentication method is untested (dixit a comment by Doychin Bondzhev in the code) and that the call to "RegisterAuthenticationMethod" in the initialization section is commented out... so, that leaves me the basic and NTLM authentication to play with... There was a discussion on that not too long ago. Try looking at past messages. Quote: Yes, I start seeing that... still the documentation is not very helpful... Complain to the documentation people about that. They have thier own group. And if you are really interested in getting better docs, you could always join the group yourself and contribute to them. Gambit Back to top Alan Garny Guest Posted: Tue Jan 13, 2004 9:25 am    Post subject: Re: HTTP + Proxy - Anyone tried it in Delphi? "Remy Lebeau (TeamB)" <gambit47.no.spam (AT) no (DOT) spam.yahoo.com> wrote Quote: "Alan Garny" <someone (AT) somewhere (DOT) com> wrote in message news:400340cc (AT) newsgroups (DOT) borland.com... I just had a look at them and indeed... except that the Digest authentication method is untested (dixit a comment by Doychin Bondzhev in the code) and that the call to "RegisterAuthenticationMethod" in the initialization section is commented out... so, that leaves me the basic and NTLM authentication to play with... There was a discussion on that not too long ago. Try looking at past messages. Will do. Quote: Yes, I start seeing that... still the documentation is not very helpful... Complain to the documentation people about that. They have thier own group. And if you are really interested in getting better docs, you could always join the group yourself and contribute to them. Well, I am sorry, but I am already working on my own open source project during my free time, so that doesn't leave me much free time (not to say none at all). Not to mention that having the Indy components shipped with D7, I would have expected some kind of support, but I guess I was wrong... maybe I shouldn't be too surprised coming from Borland (due to their legendary level of documentation - sarcasm). Anyway, I have managed to get the proxy server details (basic authentication) and authentication settings from my user. I should be able to properly trace the problem from there... Alan. Back to top Alan Garny Guest Posted: Tue Jan 13, 2004 9:48 am    Post subject: Re: HTTP + Proxy - Anyone tried it in Delphi? "Ben Hochstrasser [FF]" <bhoc@tiscali123^H^H^H.ch> wrote Quote: Alan Garny wrote: Too bad, I said a free solution (and with source code, in fact)... and there is no way around that... Synapse. Reportedly (did it myself) works with proxy. Just out of interest, I gave it a try and it seems to be working fine, so at this stage I will assume I have done something wrong with TIdHTTP... This said, there doesn't appear to be a way to set pragma options. In other words, there doesn't seem to be a way to specify that the document should be retrieved from the web site and not the cache (i.e. "no-cache" option). I have, however, hard coded it and it works nicely with it. So, overall, to add "Pragma: no-cache" to the header does the trick. Not to mention that authentication works fine. I will, nonetheless, go back to TIdHTTP, as I would very much like to understand what is going with that component... but at least, I now seem to have a working solution (at least for basic authentication). Alan. Back to top Alan Garny Guest Posted: Tue Jan 13, 2004 9:53 am    Post subject: Re: HTTP + Proxy - Anyone tried it in Delphi? "Remy Lebeau (TeamB)" <gambit47.no.spam (AT) no (DOT) spam.yahoo.com> wrote Quote: "Alan Garny" <someone (AT) somewhere (DOT) com> wrote in message news:4003b98f (AT) newsgroups (DOT) borland.com... Not to mention that having the Indy components shipped with D7, I would have expected some kind of support, but I guess I was wrong... maybe I shouldn't be too surprised coming from Borland (due to their legendary level of documentation - sarcasm). Borland has nothing to do with Indy. Indy's developers provide their own support for Indy, Borland does not do that for them. Any issues you have with Indy need to be directed to Indy's people directly, not Borland's. Some of them frequent this group, and several frequent Indy's own newsgroups at news.atozedsoftware.com. I understand that Borland has nothing to do with Indy, yet I wish they were a bit more constraining when components are to be added to the whole Delphi package. I mean that, surely, I am not the only one to use all those non-Borland tools that are shipped with D7. So, in that respect, I would hope not to have to get in touch with every single one group/company that developed those tools, should they be broken, etc. not to mention that some of those groups/companies may go out of business. Ok, enough criticism... ) Thanks for the newsgroup address. I will give it a try. Alan. Back to top Remy Lebeau (TeamB) Guest Posted: Tue Jan 13, 2004 9:53 am    Post subject: Re: HTTP + Proxy - Anyone tried it in Delphi? "Alan Garny" <someone (AT) somewhere (DOT) com> wrote Quote: Not to mention that having the Indy components shipped with D7, I would have expected some kind of support, but I guess I was wrong... maybe I shouldn't be too surprised coming from Borland (due to their legendary level of documentation - sarcasm). Borland has nothing to do with Indy. Indy's developers provide their own support for Indy, Borland does not do that for them. Any issues you have with Indy need to be directed to Indy's people directly, not Borland's. Some of them frequent this group, and several frequent Indy's own newsgroups at news.atozedsoftware.com. Gambit Back to top Chad Z. Hower aka Kudzu Guest Posted: Tue Jan 13, 2004 1:28 pm    Post subject: Re: HTTP + Proxy - Anyone tried it in Delphi? "Alan Garny" <someone (AT) somewhere (DOT) com> wrote in news:4003c000$1 @newsgroups.borland.com: Quote: I understand that Borland has nothing to do with Indy, yet I wish they were a bit more constraining when components are to be added to the whole Delphi package. I mean that, surely, I am not the only one to use all those Youve missed the entire point. Borland only provides peer support on these NGs for their own products - which is the same that is provided for Indy. For priority support for Delphi, you have to pay Borland. -- Chad Z. Hower (a.k.a. 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