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The docker client expects to read the OSType header from the `/_ping` response in order to determine the OS type of the server, for example, when running `docker run --device=/dev/fuse ...` https://github.com/moby/moby/blob/master/client/ping.go#L57 Signed-off-by: chnrxn <cohawk@yahoo.com>
32 lines
898 B
Go
32 lines
898 B
Go
package compat
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import (
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"fmt"
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"net/http"
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"runtime"
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"github.com/containers/buildah"
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)
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// Ping returns headers to client about the service
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//
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// This handler must always be the same for the compatibility and libpod URL trees!
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// Clients will use the Header availability to test which backend engine is in use.
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// Note: Additionally handler supports GET and HEAD methods
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func Ping(w http.ResponseWriter, r *http.Request) {
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// Note: API-Version and Libpod-API-Version are set in handler_api.go
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w.Header().Set("BuildKit-Version", "")
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w.Header().Set("Builder-Version", "")
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w.Header().Set("Docker-Experimental", "true")
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w.Header().Set("Cache-Control", "no-cache")
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w.Header().Set("OSType", runtime.GOOS)
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w.Header().Set("Pragma", "no-cache")
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w.Header().Set("Libpod-Buildah-Version", buildah.Version)
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w.WriteHeader(http.StatusOK)
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if r.Method == http.MethodGet {
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fmt.Fprint(w, "OK")
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}
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}
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