52 lines
1.5 KiB
Go
52 lines
1.5 KiB
Go
package middleware
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import (
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"log"
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"net/http"
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"runtime/debug"
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"time"
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)
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// JSONContentType sets the Content-Type header to application/json for all
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// requests handled by the wrapped handler.
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func JSONContentType(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Content-Type", "application/json")
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next.ServeHTTP(w, r)
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})
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}
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// responseRecorder wraps http.ResponseWriter to capture the status code.
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type responseRecorder struct {
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http.ResponseWriter
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statusCode int
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}
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func (rr *responseRecorder) WriteHeader(code int) {
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rr.statusCode = code
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rr.ResponseWriter.WriteHeader(code)
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}
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// Logger logs each HTTP request with method, path, status code, and duration.
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func Logger(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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start := time.Now()
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rec := &responseRecorder{ResponseWriter: w, statusCode: http.StatusOK}
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next.ServeHTTP(rec, r)
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log.Printf("%s %s %d %s", r.Method, r.URL.Path, rec.statusCode, time.Since(start))
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})
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}
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// Recoverer recovers from panics in downstream handlers and returns a 500
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// Internal Server Error response.
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func Recoverer(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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defer func() {
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if err := recover(); err != nil {
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log.Printf("panic recovered: %v\n%s", err, debug.Stack())
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http.Error(w, `{"error":"internal server error"}`, http.StatusInternalServerError)
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}
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}()
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next.ServeHTTP(w, r)
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})
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}
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