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cmd/geth, cmd/utils: geth attach with custom headers (ethereum#25829)
This PR makes it possible to set custom headers, in particular for two scenarios: - geth attach - geth commands which can use --remotedb, e..g geth db inspect The ability to use custom headers is typically useful for connecting to cloud-apis, e.g. providing an infura- or alchemy key, or for that matter access-keys for environments behind cloudflare. Co-authored-by: Felix Lange <fjl@twurst.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,83 @@ | ||
| // Copyright 2022 The go-ethereum Authors | ||
| // This file is part of the go-ethereum library. | ||
| // | ||
| // The go-ethereum library is free software: you can redistribute it and/or modify | ||
| // it under the terms of the GNU Lesser General Public License as published by | ||
| // the Free Software Foundation, either version 3 of the License, or | ||
| // (at your option) any later version. | ||
| // | ||
| // The go-ethereum library is distributed in the hope that it will be useful, | ||
| // but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| // GNU Lesser General Public License for more details. | ||
| // | ||
| // You should have received a copy of the GNU Lesser General Public License | ||
| // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>. | ||
|
|
||
| package main | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "net" | ||
| "net/http" | ||
| "sync/atomic" | ||
| "testing" | ||
| ) | ||
|
|
||
| type testHandler struct { | ||
| body func(http.ResponseWriter, *http.Request) | ||
| } | ||
|
|
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| func (t *testHandler) ServeHTTP(out http.ResponseWriter, in *http.Request) { | ||
| t.body(out, in) | ||
| } | ||
|
|
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| // TestAttachWithHeaders tests that 'geth attach' with custom headers works, i.e | ||
| // that custom headers are forwarded to the target. | ||
| func TestAttachWithHeaders(t *testing.T) { | ||
| t.Parallel() | ||
| ln, err := net.Listen("tcp", "localhost:0") | ||
| if err != nil { | ||
| t.Fatal(err) | ||
| } | ||
| port := ln.Addr().(*net.TCPAddr).Port | ||
| testReceiveHeaders(t, ln, "attach", "-H", "first: one", "-H", "second: two", fmt.Sprintf("http://localhost:%d", port)) | ||
| // This way to do it fails due to flag ordering: | ||
| // | ||
| // testReceiveHeaders(t, ln, "-H", "first: one", "-H", "second: two", "attach", fmt.Sprintf("http://localhost:%d", port)) | ||
| // This is fixed in a follow-up PR. | ||
| } | ||
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|
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| // TestAttachWithHeaders tests that 'geth db --remotedb' with custom headers works, i.e | ||
| // that custom headers are forwarded to the target. | ||
| func TestRemoteDbWithHeaders(t *testing.T) { | ||
| t.Parallel() | ||
| ln, err := net.Listen("tcp", "localhost:0") | ||
| if err != nil { | ||
| t.Fatal(err) | ||
| } | ||
| port := ln.Addr().(*net.TCPAddr).Port | ||
| testReceiveHeaders(t, ln, "db", "metadata", "--remotedb", fmt.Sprintf("http://localhost:%d", port), "-H", "first: one", "-H", "second: two") | ||
| } | ||
|
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| func testReceiveHeaders(t *testing.T, ln net.Listener, gethArgs ...string) { | ||
| var ok uint32 | ||
| server := &http.Server{ | ||
| Addr: "localhost:0", | ||
| Handler: &testHandler{func(w http.ResponseWriter, r *http.Request) { | ||
| // We expect two headers | ||
| if have, want := r.Header.Get("first"), "one"; have != want { | ||
| t.Fatalf("missing header, have %v want %v", have, want) | ||
| } | ||
| if have, want := r.Header.Get("second"), "two"; have != want { | ||
| t.Fatalf("missing header, have %v want %v", have, want) | ||
| } | ||
| atomic.StoreUint32(&ok, 1) | ||
| }}} | ||
| go server.Serve(ln) | ||
| defer server.Close() | ||
| runGeth(t, gethArgs...).WaitExit() | ||
| if atomic.LoadUint32(&ok) != 1 { | ||
| t.Fatal("Test fail, expected invocation to succeed") | ||
| } | ||
| } |
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