net/http: Transport.Proxy fails with HTTPS

[3052]

Go version

go version go1.24.0 windows/amd64

Output of go env in your module/workspace:

set AR=ar
set CC=gcc
set CGO_CFLAGS=-O2 -g
set CGO_CPPFLAGS=
set CGO_CXXFLAGS=-O2 -g
set CGO_ENABLED=0
set CGO_FFLAGS=-O2 -g
set CGO_LDFLAGS=-O2 -g
set CXX=g++
set GCCGO=gccgo
set GO111MODULE=
set GOAMD64=v1
set GOARCH=amd64
set GOAUTH=netrc
set GOBIN=
set GOCACHE=C:\Users\Steven\AppData\Local\go-build
set GOCACHEPROG=
set GODEBUG=
set GOENV=C:\Users\Steven\AppData\Roaming\go\env
set GOEXE=.exe
set GOEXPERIMENT=
set GOFIPS140=off
set GOFLAGS=
set GOGCCFLAGS=-m64 -fno-caret-diagnostics -Qunused-arguments -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=C:\Windows\TEMP\go-build1974498014=/tmp/go-build -gno-record-gcc-switches
set GOHOSTARCH=amd64
set GOHOSTOS=windows
set GOINSECURE=
set GOMOD=NUL
set GOMODCACHE=C:\Users\Steven\go\pkg\mod
set GONOPROXY=
set GONOSUMDB=
set GOOS=windows
set GOPATH=C:\Users\Steven\go
set GOPRIVATE=
set GOPROXY=direct
set GOROOT=D:\go
set GOSUMDB=off
set GOTELEMETRY=off
set GOTELEMETRYDIR=C:\Users\Steven\AppData\Roaming\go\telemetry
set GOTMPDIR=
set GOTOOLCHAIN=auto
set GOTOOLDIR=D:\go\pkg\tool\windows_amd64
set GOVCS=
set GOVERSION=go1.24.0
set GOWORK=
set PKG_CONFIG=pkg-config

What did you do?

this code works fine:

package main

import (
   "net/http"
   "net/url"
   "os"
)

func main() {
   var port http.Transport
   http.DefaultClient.Transport = &port
   get()
   port.Proxy = http.ProxyURL(&url.URL{
      Scheme: "http", Host: "127.0.0.1:8080",
   })
   get()
}

func get() error {
   resp, err := http.Get("http://httpbingo.org/get")
   if err != nil {
      return err
   }
   return resp.Write(os.Stdout)
}

but if I use HTTPS instead the proxy is not used:

resp, err := http.Get("https://httpbingo.org/get")

[gabyhelp]

Related Issues

• net/http: Error fetching URL: Get "http://www.google.com": proxyconnect tcp: dial tcp: lookup http: no such host #61436 (closed)
• net/http: http client not support `socks://` proxy #65766 (closed)
• net/http: provide better error message when proxy is misconfigured #29809
• net/http: DefaultTransport documentation should describe HTTPS_PROXY #32649 (closed)
• net/url: proxy settings will be ignored when user credentials have a % sign in it #38166 (closed)
• net/http: allow customizing proxy CONNECT url #45460
• x/net/http2: Transport ignores net/http.Transport.Proxy once connected #25793
• affected/package: net/http #61047 (closed)
• net/http: http.Transport Clone() bug #52713 (closed)

Related Discussions

• HTTPS proxy issue using CONNECT method

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