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context.go
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context.go
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package fastserver
import (
"bufio"
"bytes"
"encoding/json"
"fmt"
"github.com/valyala/fasthttp"
"net"
"net/http"
"strings"
)
type Context struct {
FastCtx *fasthttp.RequestCtx
idx int
Path string // 由于是从fasthttp 里面取过来的,不能够在其他的协程中使用
Method string
handlers []Handler
Params Params
RequestURI string
//values map[string]interface{}
}
func (c *Context) Run() {
for c.idx < len(c.handlers) {
hd := c.handlers[c.idx]
hd(c)
c.idx++
}
}
func (c *Context) Next() {
c.idx++
c.Run()
}
func (c *Context) reset() {
c.Params = c.Params[:0]
c.idx = 0
}
func (c *Context) Abort() {
c.idx = len(c.handlers)
}
func (c *Context) AbortWithStatusJson(status int, o interface{}) error {
c.Abort()
//c.FastCtx.SetStatusCode(status)
js, err := json.Marshal(o)
if err != nil {
return err
}
c.AbortWithData(status, js)
return nil
}
func (c *Context) AbortWithData(status int, data []byte) {
c.Abort()
c.FastCtx.SetStatusCode(status)
c.FastCtx.Write(data)
}
func (c *Context) SetUserValue(key string, val interface{}) {
c.FastCtx.SetUserValue(key, val)
}
func (c *Context) GetUserValue(key string) interface{} {
return c.FastCtx.Value(key)
}
func (c *Context) Redirect(uri string, statusCode int) {
c.FastCtx.Redirect(uri, statusCode)
}
// 获取标准的http request
func (c *Context) StdHttpRequest() *http.Request {
fc := c.FastCtx
req, _ := http.NewRequest(c.Method, c.RequestURI, bytes.NewReader(c.FastCtx.PostBody()))
//if err != nil {
// return nil, err
//}
fc.Request.Header.VisitAll(func(key, value []byte) {
k := stringOf(key)
v := stringOf(value)
req.Header.Set(k, v)
})
return req
}
const (
ContentTypeUrlEncode = "application/x-www-form-urlencoded"
ContentTypeApplicationJson = "application/json"
ContentTypeNone = "-"
)
func (c *Context) Bind(api *Api, model interface{}) error {
if model == nil {
return nil
}
contentType := string(c.FastCtx.Request.Header.Peek("Content-Type"))
if !strings.HasPrefix(contentType, api.ContentType) && api.ContentType != ContentTypeNone {
return fmt.Errorf("contentType should be Content-type:%s", api.ContentType)
}
var err error
if strings.HasPrefix(contentType, ContentTypeUrlEncode) || api.ContentType == ContentTypeNone {
err = bindArgs(c, model, true)
return err
}
if strings.HasPrefix(contentType, ContentTypeApplicationJson) {
err = unmarshalJson(c.FastCtx.PostBody(), model)
if err != nil {
return err
}
err = bindArgs(c, model, false)
}
return err
}
func unmarshalJson(data []byte, v interface{}) error {
d := json.NewDecoder(bytes.NewReader(data))
d.DisallowUnknownFields()
return d.Decode(v)
}
// 获取标准的 http responseWriter
func (c *Context) StdResponseWriter() http.ResponseWriter {
return newHttpRespW(c.FastCtx)
}
func (c *Context) SetResponseHeader(k, v string) {
c.FastCtx.Response.Header.Set(k, v)
}
func (c *Context) GetRequestHeader(key string) string {
return string(c.FastCtx.Request.Header.Peek(key))
}
func (c *Context) ClientProxyIP() string {
clientIP := c.GetRequestHeader("X-Forwarded-For")
clientIP = strings.TrimSpace(strings.Split(clientIP, ",")[0])
if clientIP == "" {
clientIP = strings.TrimSpace(c.GetRequestHeader("X-Real-Ip"))
}
if clientIP != "" {
return clientIP
}
if addr := c.GetRequestHeader("X-Appengine-Remote-Addr"); addr != "" {
return addr
}
return ""
}
func (c *Context) ClientIp() net.IP {
ip := c.ClientProxyIP()
if ip == "" {
return c.FastCtx.RemoteIP().To4()
}
ipn := net.ParseIP(ip)
if ipn != nil {
return ipn.To4()
}
return ipn
}
type H map[string]interface{}
type httpRespW struct {
ctx *fasthttp.RequestCtx
header http.Header
}
func (h *httpRespW) Hijack() (net.Conn, *bufio.ReadWriter, error) {
h.ctx.Hijack(func(c net.Conn) {
})
conn := h.ctx.Conn()
return conn, bufio.NewReadWriter(bufio.NewReader(conn), bufio.NewWriter(conn)), nil
}
func newHttpRespW(ctx *fasthttp.RequestCtx) http.ResponseWriter {
rw := &httpRespW{
ctx: ctx,
header: http.Header{},
}
return rw
}
func (h *httpRespW) Header() http.Header {
return h.header
}
func (h *httpRespW) Write(bytes []byte) (int, error) {
return h.ctx.Write(bytes)
}
func (h *httpRespW) WriteHeader(statusCode int) {
h.ctx.SetStatusCode(statusCode)
}