Trunk FPC: fphttpclient and proxies
lazarus / 38-Networking and Web Programming

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Renat.Su · 2018-12-17 16:18

I was told here that the proxy for the fphttpclient in the trunk
version is implemented.
But when I looked at the source code in trunk lazarus (FPC 3.2.0),
found at the top of the same comment:
Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i {
--------------------------------------------------------------------- 
Todo:  * Proxy support ? 
---------------------------------------------------------------------}
Is there or is there no proxy support?.. Or it is there with some
nuances?

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Thaddy · 2018-12-17 19:55

seems a bug in the comment

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Renat.Su · 2018-12-17 20:17

Quote from: Thaddy on December 17, 2018, 08:55:48 pmseems a bug in the
comment
Thank You!

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balazsszekely · 2018-12-18 05:21

@Renat.Su
Please note that only http proxy is implemented. Do not try anything
else, for example socks protocol will not work(SOCKS4, SOCKS4a,
SOCKS5).

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Thaddy · 2018-12-18 07:42

Quote from: GetMem on December 18, 2018, 06:21:00 am@Renat.Su
Please note that only http proxy is implemented. Do not try anything
else, for example socks protocol will not work(SOCKS4, SOCKS4a,
SOCKS5).
Correct, but these would be implemented elsewhere in the code base,
probably fpsockets or in a separate unit.

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Renat.Su · 2018-12-18 08:01

Quote from: GetMem on December 18, 2018, 06:21:00 am@Renat.Su
Please note that only http proxy is implemented. Do not try anything
else, for example socks protocol will not work(SOCKS4, SOCKS4a,
SOCKS5).
Yes, I understand. To begin with http proxy would be nice

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Renat.Su · 2018-12-18 20:58

Hm... Tested:
TFPHTTPClient:
HTTP -  worked
HTTPS - worked
HTTP with proxy - worked
HTTPS with proxy - not worked
That's sad. Unsecured sites at HTTP not so many, so it left turns
proxies almost useless. Or I do not know some nuance?
P.S. Tested with various web sites and HTTP proxies

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Renat.Su · 2019-01-03 15:44

So, post the result of my research at the moment 

TFPHTTPClient
HTTP -  worked
HTTPS - worked
HTTP with proxy - worked (only trunk FPC)
HTTPS with proxy - not worked

Synapse HTTPClient THTTPSend class
HTTP -  worked
HTTPS - worked
HTTP with proxy - worked
HTTPS with proxy - worked (Windows)
HTTPS with proxy - not worked (Linux: Debian x86_84) or works with the
hack (see post below)

Indy 10 HTTPClient TIdHTTP
HTTP -  worked
HTTPS - worked
HTTP with proxy - worked
HTTPS with proxy - worked   

Further

I wrote a basic client class emulating properties and functions (so
far the ones I need) and separated the HTTP client from
implementation. Accordingly, it will be possible to connect the
required HTTP client by registering its implementation class. If
anyone is interested - an example here
where
basehttpclient.pas - base abstract http client class
fphttpclientbroker.pas -native TFPHTTPClient implementation
synapsehttpclientbroker.pas - Synapse THTTPSend implementation
indyhttpclientbroker.pas - Indy TIdHTTP implementation

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Renat.Su · 2020-02-12 14:19

I found (thanks @ashumkin) the feature that I want to share with
others if they encounter it
Synapse can works with proxy+HTTPS in Linux if change the code in the
synapse library...
You must to comment or delete the line Port:=
IntToStr(ResolvePort(Port)); in blcksock.pas
Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i procedure
TTCPBlockSocket.HTTPTunnelDoConnect(IP, Port: string);//bugfixed by
Mike Green (mgreen@emixode.com)var  s: string;begin  //Port :=
IntToStr(ResolvePort(Port));   inherited Connect(FHTTPTunnelIP,
FHTTPTunnelPort);  if FLastError <> 0 then    Exit;  FHTTPTunnel :=
False;

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Segator · 2020-05-25 15:31

HTTPS over HTTPS Proxy is not implemented yet in TFPHTTPClient?

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Renat.Su · 2020-05-25 15:42

Quote from: Segator on May 25, 2020, 05:31:43 pmHTTPS over HTTPS Proxy
is not implemented yet in TFPHTTPClient?
No, as I know.  But You can use synapse or Indy for this. I had to
make it possible to connect different HTTP libraries using the broker
system