Name
easy:SetOpt_Resolver_Start_Function -- callback called before a new name resolve is started (V2.0)
Synopsis
easy:SetOpt_Resolver_Start_Function(resolver_start_cb[, userdata])
Function
Pass a callback function. This callback function gets called by libcurl every tim before a new resolve request is started. If you pass the optional userdata argument, the value you pass in userdata will be passed to your callback function as a second parameter. The userdata parameter can be of any type.

The callback must return 0 on success. Returning a non-zero value will cause the resolve to fail.

Inputs
resolver_start_cb
callback function
userdata
optional: user data to pass to callback function

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