36 lines
1.2 KiB
Go
36 lines
1.2 KiB
Go
package middleware
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import (
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"net/http"
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"strings"
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"github.com/Sirupsen/logrus"
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"github.com/docker/docker/api/server/httputils"
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"github.com/docker/docker/pkg/version"
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"golang.org/x/net/context"
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)
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// NewUserAgentMiddleware creates a new UserAgent middleware.
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func NewUserAgentMiddleware(versionCheck string) Middleware {
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serverVersion := version.Version(versionCheck)
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return func(handler httputils.APIFunc) httputils.APIFunc {
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return func(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
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if strings.Contains(r.Header.Get("User-Agent"), "Docker-Client/") {
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userAgent := strings.Split(r.Header.Get("User-Agent"), "/")
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// v1.20 onwards includes the GOOS of the client after the version
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// such as Docker/1.7.0 (linux)
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if len(userAgent) == 2 && strings.Contains(userAgent[1], " ") {
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userAgent[1] = strings.Split(userAgent[1], " ")[0]
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}
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if len(userAgent) == 2 && !serverVersion.Equal(version.Version(userAgent[1])) {
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logrus.Debugf("Client and server don't have the same version (client: %s, server: %s)", userAgent[1], serverVersion)
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}
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}
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return handler(ctx, w, r, vars)
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}
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}
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}
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