Method write50x

internal/nodes/http_request_error.go:68–119

(err error, statusCode int, enMessage string, zhMessage string, canTryStale bool)

}

func (this *HTTPRequest) write50x(err error, statusCode int, enMessage string, zhMessage string, canTryStale bool) {
	if err != nil {
		this.addError(err)
	}

	// 尝试从缓存中恢复
	if canTryStale &&
		this.cacheCanTryStale &&
		this.web.Cache.Stale != nil &&
		this.web.Cache.Stale.IsOn &&
		(len(this.web.Cache.Stale.Status) == 0 || lists.ContainsInt(this.web.Cache.Stale.Status, statusCode)) {
		var ok = this.doCacheRead(true)
		if ok {
			return
		}
	}

	// 显示自定义页面
	if this.doPage(statusCode) {
		return
	}

	// 内置HTML模板
	var pageContent = configutils.ParseVariables(httpStatusPageTemplate, func(varName string) (value string) {
		switch varName {
		case "status":
			return types.String(statusCode)
		case "statusMessage":
			return http.StatusText(statusCode)
		case "requestId":
			return this.requestId
		case "message":
			var acceptLanguages = this.RawReq.Header.Get("Accept-Language")
			if len(acceptLanguages) > 0 {
				var index = strings.Index(acceptLanguages, ",")
				if index > 0 {
					var firstLanguage = acceptLanguages[:index]
					if firstLanguage == "zh-CN" {
						return "网站出了一点小问题，原因：" + zhMessage + "。"
					}
				}
			}
			return "The site is unavailable now, cause: " + enMessage + "."
		}
		return this.Format("${" + varName + "}")
	})

	this.ProcessResponseHeaders(this.writer.Header(), statusCode)
	this.writer.WriteHeader(statusCode)

	_, _ = this.writer.Write([]byte(pageContent))
}