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Administrator
Titanium-Web-Proxy
Commits
87ec92ce
Commit
87ec92ce
authored
Sep 27, 2018
by
justcoding121
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separate dns resolution
parent
4d00181e
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1 changed file
with
26 additions
and
5 deletions
+26
-5
TcpConnectionFactory.cs
src/Titanium.Web.Proxy/Network/Tcp/TcpConnectionFactory.cs
+26
-5
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src/Titanium.Web.Proxy/Network/Tcp/TcpConnectionFactory.cs
View file @
87ec92ce
...
...
@@ -22,6 +22,8 @@ namespace Titanium.Web.Proxy.Network.Tcp
/// </summary>
internal
class
TcpConnectionFactory
:
IDisposable
{
private
static
readonly
Random
rnd
=
new
Random
();
//Tcp server connection pool cache
private
readonly
ConcurrentDictionary
<
string
,
ConcurrentQueue
<
TcpServerConnection
>>
cache
=
new
ConcurrentDictionary
<
string
,
ConcurrentQueue
<
TcpServerConnection
>>();
...
...
@@ -282,14 +284,33 @@ namespace Titanium.Web.Proxy.Network.Tcp
tcpClient
.
Client
.
SetSocketOption
(
SocketOptionLevel
.
Socket
,
SocketOptionName
.
ReuseAddress
,
true
);
}
// If this proxy uses another external proxy then create a tunnel request for HTTP/HTTPS connections
if
(
useUpstreamProxy
)
var
hostname
=
useUpstreamProxy
?
externalProxy
.
HostName
:
remoteHostName
;
var
port
=
useUpstreamProxy
?
externalProxy
.
Port
:
remotePort
;
var
ipHostEntry
=
await
Dns
.
GetHostEntryAsync
(
hostname
);
if
(
ipHostEntry
==
null
||
ipHostEntry
.
AddressList
.
Length
==
0
)
{
await
tcpClient
.
ConnectAsync
(
externalProxy
.
HostName
,
externalProxy
.
Port
);
throw
new
Exception
(
$"Could not resolve the hostname
{
hostname
}
"
);
}
else
var
ipAddresses
=
ipHostEntry
.
AddressList
.
OrderBy
(
x
=>
rnd
.
Next
()).
ToArray
();
for
(
int
i
=
0
;
i
<
ipAddresses
.
Length
;
i
++)
{
await
tcpClient
.
ConnectAsync
(
remoteHostName
,
remotePort
);
try
{
await
tcpClient
.
ConnectAsync
(
ipAddresses
[
i
],
port
);
break
;
}
catch
(
Exception
e
)
{
if
(
i
==
ipAddresses
.
Length
-
1
)
{
throw
new
Exception
(
$"Could not resolve the hostname
{
hostname
}
"
,
e
);
}
}
}
await
proxyServer
.
InvokeConnectionCreateEvent
(
tcpClient
,
false
);
...
...
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