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> A small C++/Go/… proxy Got any recommendations for lightweight proxies that can run on macOS and serve other devices in the home?

• oefrha 2y ago
  https://github.com/elazarl/goproxy https://github.com/elazarl/goproxy is pretty nice Go library for writing proxies, I used it once. Supports both HTTPS passthrough and MITM. Here's a trivial example MITMing connections to www.google.com and rejecting requests to https://www.google.com/maps https://www.google.com/maps while allowing everything else through: package main import ( "log" "net/http" "strings" "github.com/elazarl/goproxy" ) func main() { proxy := goproxy.NewProxyHttpServer() proxy.Verbose = true proxy.OnRequest(goproxy.DstHostIs("www.google.com")).HandleConnect(goproxy.AlwaysMitm) proxy.OnRequest(goproxy.DstHostIs("www.google.com")).DoFunc(func(r *http.Request, ctx *goproxy.ProxyCtx) (*http.Request, *http.Response) { if strings.HasPrefix(r.URL.Path, "/maps") { return r, goproxy.NewResponse(r, "text/plain", 403, "Forbidden") } return r, nil }) log.Fatal(http.ListenAndServe(":8080", proxy)) } Try: curl -k -x localhost:8080 https://www.google.com/ curl -k -x localhost:8080 https://www.google.com/maps curl -x localhost:8080 https://www.apple.com/ -k is to ignore cert error; note how we don't need it for apple.com due to passthrough. Remember to use your own cert rather than the hardcoded one in "production" (a trusted network like your home of course, probably a bad idea to expose it on the open Internet).