CODEWITHSUNDEEP
delphiindyproxy-server
Codder71
Codder71

Reputation: 23

Indy HTTP Proxy Server, how to set a password?

I'm thinking of writing a Proxy Server. When I specify and activate the port using the TIdHTTPProxyServer component, the proxy server works properly. It's okay so far, but I can't password it and I can't open an IPv6 proxy. It's just an IPv4 proxy. I couldn't find much documentation on this.

Upvotes: 0

Views: 287

Answers (1)

Remy Lebeau
Remy Lebeau

Reputation: 596497

I can't password it

TIdHTTPProxyServer does not currently implement any authentication of its own.

HTTP authentication between the client and target server is handled transparently between the two of them, TIdHTTPProxyServer is not involved in that process.

If you want to password-protect the proxy itself, you will have to manually handle authentication in the proxy's OnHTTPBeforeCommand event. Check the client's request headers (in the event's AContext.Headers property) for a Proxy-Authorization header, and if it is not present, or its credentials fail, then manually send the client (via the AContext.Connection property) an HTTP 407 response containing an appropriate Proxy-Authenticate header, and then raise an exception (or disconnect the AContext.Connection) to stop processing the current proxy request.

I can't open an IPv6 proxy. It's just an IPv4 proxy.

TIdHTTPProxyServer can handle both IPv4 and IPv6, but it will require some manual setup.

Whichever IP version Indy is compiled for by default is specified in the global ID_DEFAULT_IP_VERSION constant in Indy's IdGlobal unit (it is set to IPv4, unless Indy is compiled with IdIPv6 defined in IdCompilerDefines.inc).

Listening IP/port pairs can be configured in the proxy's Bindings collection. You can specify an IPVersion for each binding. The IPVersion is set to ID_DEFAULT_IP_VERSION by default.

If you don't specify any Bindings entries, the proxy's DefaultPort property is used instead. The proxy will then open either 1 or 2 listening ports, depending on platform and OS capabilities. If 1 port is opened, it will use ID_DEFAULT_IP_VERSION. If 2 ports are opened, 1 will be IPv4 and 1 will be IPv6.

So, if you want control over the setup of the listening IP/ports, don't leave the Bindings empty.

Once a client has connected to a listening port, the TIdHTTPProxyServerContext.OutboundClient object that is used to connect to the next HTTP server will use ID_DEFAULT_IP_VERSION by default. You can override this in the proxy's OnHTTPBeforeCommand event, by casting the event's AContext.OutboundClient property to TIdTCPClient and then setting its IPVersion property.

Upvotes: 1

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