67 lines
1.9 KiB
Go
67 lines
1.9 KiB
Go
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package logging
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import (
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"context"
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"net/http"
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"github.com/rs/xid"
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)
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type key int
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const (
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// RequestIDKey is the context key that should store the request identifier.
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RequestIDKey key = iota
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// UserIDKey is the context key that should store the user identifier.
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UserIDKey
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)
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// NewRequestID creates a new request id using github.com/rs/xid.
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func NewRequestID() string {
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return xid.New().String()
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}
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// RequestID returns a new middleware that gets the given header and sets it
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// in the context so it can be written in the logger. If the header does not
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// exists or it's the empty string, it uses github.com/rs/xid to create a new
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// one.
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func RequestID(headerName string) func(next http.Handler) http.Handler {
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return func(next http.Handler) http.Handler {
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fn := func(w http.ResponseWriter, req *http.Request) {
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requestID := req.Header.Get(headerName)
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if requestID == "" {
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requestID = NewRequestID()
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req.Header.Set(headerName, requestID)
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}
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ctx := WithRequestID(req.Context(), requestID)
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next.ServeHTTP(w, req.WithContext(ctx))
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}
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return http.HandlerFunc(fn)
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}
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}
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// WithRequestID returns a new context with the given requestID added to the
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// context.
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func WithRequestID(ctx context.Context, requestID string) context.Context {
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return context.WithValue(ctx, RequestIDKey, requestID)
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}
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// GetRequestID returns the request id from the context if it exists.
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func GetRequestID(ctx context.Context) (string, bool) {
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v, ok := ctx.Value(RequestIDKey).(string)
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return v, ok
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}
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// WithUserID decodes the token, extracts the user from the payload and stores
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// it in the context.
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func WithUserID(ctx context.Context, userID string) context.Context {
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return context.WithValue(ctx, UserIDKey, userID)
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}
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// GetUserID returns the request id from the context if it exists.
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func GetUserID(ctx context.Context) (string, bool) {
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v, ok := ctx.Value(UserIDKey).(string)
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return v, ok
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}
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