97 lines
2.1 KiB
Go
97 lines
2.1 KiB
Go
package routes
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import (
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"errors"
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"fmt"
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"foobar/metrics"
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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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type wrappedWriter struct {
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http.ResponseWriter
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statusCode int
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}
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func (w *wrappedWriter) WriteHeader(statusCode int) {
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w.ResponseWriter.WriteHeader(statusCode)
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w.statusCode = statusCode
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}
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func logging(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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wrapped := &wrappedWriter{
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ResponseWriter: w,
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statusCode: http.StatusOK,
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}
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var panicked bool
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err := recoverServeHTTP(next, wrapped, r)
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if err != nil {
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wrapped.Write([]byte("500 error"))
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log.Println(err)
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panicked = true
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}
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var (
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latency = time.Since(start)
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path = r.URL.Path
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statusCode = wrapped.statusCode
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)
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if path == "/metrics" && statusCode == 200 {
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return
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}
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log.Printf("%v %v %v %v", wrapped.statusCode, r.Method, r.URL.Path, latency)
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metrics.ResponseLatencyObserve(latency, statusCode, panicked, r)
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})
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}
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func recoverServeHTTP(next http.Handler, w http.ResponseWriter, r *http.Request) (e error) {
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defer func() {
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if rec := recover(); rec != nil {
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var err error
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switch v := rec.(type) {
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case error:
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err = v
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default:
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err = fmt.Errorf("%v", v)
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}
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stack := debug.Stack()
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w.WriteHeader(http.StatusInternalServerError)
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e = errors.Join(err, fmt.Errorf(string(stack)))
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}
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}()
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next.ServeHTTP(w, r)
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return
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}
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func logError(err error) {
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if err == nil {
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log.Printf("LOG: Erro Nulo!?\n")
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} else {
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log.Printf("LOG: %s\n", err.Error())
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}
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log.Println(string(debug.Stack()))
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}
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func logInternalError(w http.ResponseWriter, err error) {
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logError(err)
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http.Error(w, `500`, http.StatusInternalServerError)
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}
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func httpErrorf(w http.ResponseWriter, status int, formatString string, format ...interface{}) {
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http.Error(w, fmt.Sprintf(formatString, format...), status)
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}
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func formValueMissing(field string, r *http.Request) error {
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return fmt.Errorf(
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"campo '%s' em formulário não pôde ser encontrado. Content-Type: %s",
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field,
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r.Header.Get("Content-Type"),
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)
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}
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