package main
import (
 "net/http"
)
func main() {
 //路由处理绑定
 http.HandleFunc("/", Hander)
 //监听8080端口
 http.ListenAndServe(":8080", nil)
}
func Hander(w http.ResponseWriter, req *http.Request) {
 //设置 http请求状态
 w.WriteHeader(500)
 //写入页面数据
 w.Write([]byte("xiaochuan"))
}

const (
 StatusContinue   = 100
 StatusSwitchingProtocols = 101
 StatusOK     = 200
 StatusCreated    = 201
 StatusAccepted    = 202
 StatusNonAuthoritativeInfo = 203
 StatusNoContent   = 204
 StatusResetContent   = 205
 StatusPartialContent  = 206
 StatusMultipleChoices = 300
 StatusMovedPermanently = 301
 StatusFound    = 302
 StatusSeeOther   = 303
 StatusNotModified  = 304
 StatusUseProxy   = 305
 StatusTemporaryRedirect = 307
 StatusBadRequest     = 400
 StatusUnauthorized     = 401
 StatusPaymentRequired    = 402
 StatusForbidden     = 403
 StatusNotFound      = 404
 StatusMethodNotAllowed    = 405
 StatusNotAcceptable    = 406
 StatusProxyAuthRequired   = 407
 StatusRequestTimeout    = 408
 StatusConflict      = 409
 StatusGone       = 410
 StatusLengthRequired    = 411
 StatusPreconditionFailed   = 412
 StatusRequestEntityTooLarge  = 413
 StatusRequestURITooLong   = 414
 StatusUnsupportedMediaType   = 415
 StatusRequestedRangeNotSatisfiable = 416
 StatusExpectationFailed   = 417
 StatusTeapot      = 418
 StatusInternalServerError  = 500
 StatusNotImplemented   = 501
 StatusBadGateway    = 502
 StatusServiceUnavailable  = 503
 StatusGatewayTimeout   = 504
 StatusHTTPVersionNotSupported = 505
 // New HTTP status codes from RFC 6585. Not exported yet in Go 1.1.
 // See discussion at https://codereview.appspot.com/7678043/
 statusPreconditionRequired   = 428
 statusTooManyRequests    = 429
 statusRequestHeaderFieldsTooLarge = 431
 statusNetworkAuthenticationRequired = 511
)

package main
import (
 "net/http"
)
func main() {
 //路由处理绑定
 http.HandleFunc("/", Hander)
 //监听8080端口
 http.ListenAndServe(":8080", nil)
}
func Hander(w http.ResponseWriter, req *http.Request) {
 //设置 http请求状态 为500
 w.WriteHeader(http.StatusInternalServerError)
 //写入页面数据
 w.Write([]byte("xiaochuan"))
}

// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package http
// HTTP status codes, defined in RFC 2616.
const (
 StatusContinue   = 100
 StatusSwitchingProtocols = 101
 StatusOK     = 200
 StatusCreated    = 201
 StatusAccepted    = 202
 StatusNonAuthoritativeInfo = 203
 StatusNoContent   = 204
 StatusResetContent   = 205
 StatusPartialContent  = 206
 StatusMultipleChoices = 300
 StatusMovedPermanently = 301
 StatusFound    = 302
 StatusSeeOther   = 303
 StatusNotModified  = 304
 StatusUseProxy   = 305
 StatusTemporaryRedirect = 307
 StatusBadRequest     = 400
 StatusUnauthorized     = 401
 StatusPaymentRequired    = 402
 StatusForbidden     = 403
 StatusNotFound      = 404
 StatusMethodNotAllowed    = 405
 StatusNotAcceptable    = 406
 StatusProxyAuthRequired   = 407
 StatusRequestTimeout    = 408
 StatusConflict      = 409
 StatusGone       = 410
 StatusLengthRequired    = 411
 StatusPreconditionFailed   = 412
 StatusRequestEntityTooLarge  = 413
 StatusRequestURITooLong   = 414
 StatusUnsupportedMediaType   = 415
 StatusRequestedRangeNotSatisfiable = 416
 StatusExpectationFailed   = 417
 StatusTeapot      = 418
 StatusPreconditionRequired   = 428
 StatusTooManyRequests    = 429
 StatusRequestHeaderFieldsTooLarge = 431
 StatusUnavailableForLegalReasons = 451
 StatusInternalServerError   = 500
 StatusNotImplemented    = 501
 StatusBadGateway     = 502
 StatusServiceUnavailable   = 503
 StatusGatewayTimeout    = 504
 StatusHTTPVersionNotSupported  = 505
 StatusNetworkAuthenticationRequired = 511
)
var statusText = map[int]string{
 StatusContinue:   "Continue",
 StatusSwitchingProtocols: "Switching Protocols",
 StatusOK:     "OK",
 StatusCreated:    "Created",
 StatusAccepted:    "Accepted",
 StatusNonAuthoritativeInfo: "Non-Authoritative Information",
 StatusNoContent:   "No Content",
 StatusResetContent:   "Reset Content",
 StatusPartialContent:  "Partial Content",
 StatusMultipleChoices: "Multiple Choices",
 StatusMovedPermanently: "Moved Permanently",
 StatusFound:    "Found",
 StatusSeeOther:   "See Other",
 StatusNotModified:  "Not Modified",
 StatusUseProxy:   "Use Proxy",
 StatusTemporaryRedirect: "Temporary Redirect",
 StatusBadRequest:     "Bad Request",
 StatusUnauthorized:     "Unauthorized",
 StatusPaymentRequired:    "Payment Required",
 StatusForbidden:     "Forbidden",
 StatusNotFound:      "Not Found",
 StatusMethodNotAllowed:    "Method Not Allowed",
 StatusNotAcceptable:    "Not Acceptable",
 StatusProxyAuthRequired:   "Proxy Authentication Required",
 StatusRequestTimeout:    "Request Timeout",
 StatusConflict:      "Conflict",
 StatusGone:       "Gone",
 StatusLengthRequired:    "Length Required",
 StatusPreconditionFailed:   "Precondition Failed",
 StatusRequestEntityTooLarge:  "Request Entity Too Large",
 StatusRequestURITooLong:   "Request URI Too Long",
 StatusUnsupportedMediaType:   "Unsupported Media Type",
 StatusRequestedRangeNotSatisfiable: "Requested Range Not Satisfiable",
 StatusExpectationFailed:   "Expectation Failed",
 StatusTeapot:      "I'm a teapot",
 StatusPreconditionRequired:   "Precondition Required",
 StatusTooManyRequests:    "Too Many Requests",
 StatusRequestHeaderFieldsTooLarge: "Request Header Fields Too Large",
 StatusUnavailableForLegalReasons: "Unavailable For Legal Reasons",
 StatusInternalServerError:   "Internal Server Error",
 StatusNotImplemented:    "Not Implemented",
 StatusBadGateway:     "Bad Gateway",
 StatusServiceUnavailable:   "Service Unavailable",
 StatusGatewayTimeout:    "Gateway Timeout",
 StatusHTTPVersionNotSupported:  "HTTP Version Not Supported",
 StatusNetworkAuthenticationRequired: "Network Authentication Required",
}
// 返回httpcode对应的 状态码描述信息
// 返回空字符串表示状态码 unknown
func StatusText(code int) string {
 return statusText[code]
}