摘要：
In routes.go: router.Handler(http.MethodGet, "/debug/vars", expvar.Handler()) func main() { expvar.NewString("version").Set(version) ... func main() {
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摘要：
package main import ( "log" "net/http" ) const html = ` <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> </head> <body> <h1>Simple CORS<
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