forked from Odinman/ogo
/
http_middleware.go
344 lines (297 loc) · 7.68 KB
/
http_middleware.go
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package ogo
import (
"fmt"
"mime"
"net/http"
//"path/filepath"
"runtime/debug"
"strings"
"time"
"github.com/Odinman/ogo/utils"
"github.com/dustin/randbo"
"github.com/zenazn/goji/web"
)
// Key to use when setting the request ID.
const (
//固定参数名称
_PARAM_FIELDS = "fields"
_PARAM_PAGE = "page"
_PARAM_PERPAGE = "per_page"
_PARAM_DATE = "date"
_PARAM_START = "start"
_PARAM_END = "end"
_PARAM_ORDERBY = "orderby"
//特殊前缀
_PPREFIX_NOT = '!'
_PPREFIX_LIKE = '~'
// 查询类型
_CTYPE_IS = 0
_CTYPE_NOT = 1
_CTYPE_LIKE = 2
_CTYPE_JOIN = 3
OriginalRemoteAddrKey = "originalRemoteAddr"
)
var (
xForwardedFor = http.CanonicalHeaderKey("X-Forwarded-For")
xRealIP = http.CanonicalHeaderKey("X-Real-IP")
contentType = http.CanonicalHeaderKey("Content-Type")
contentDisposition = http.CanonicalHeaderKey("Content-Disposition")
contentMD5 = http.CanonicalHeaderKey("Content-MD5")
rcHolder func(c web.C, w http.ResponseWriter, r *http.Request) *RESTContext
)
/* {{{ func EnvInit(c *web.C, h http.Handler) http.Handler
* 初始化环境
*/
func EnvInit(c *web.C, h http.Handler) http.Handler {
fn := func(w http.ResponseWriter, r *http.Request) {
ac := new(Access) //access日志信息
ac.Time = time.Now()
ac.Method = r.Method
ac.URI = r.RequestURI
ac.Proto = r.Proto
ac.Host = r.Host
ac.InHeader = &r.Header
// env
if c.Env == nil {
//c.Env = make(map[string]interface{})
c.Env = make(map[interface{}]interface{})
}
// make rand string(for debug, session...)
buf := make([]byte, 16)
randbo.New().Read(buf) //号称最快的随机字符串
ac.Session = fmt.Sprintf("%x", buf)
c.Env[RequestIDKey] = ac.Session
c.Env[LogPrefixKey] = "[" + ac.Session[:10] + "]" //只显示前十位
Trace("[%s] [%s %s] started", ac.Session[:10], r.Method, r.RequestURI)
lw := utils.WrapWriter(w)
pathPieces := strings.Split(r.URL.Path, "/")
for off, piece := range pathPieces {
if piece != "" {
if off == 1 {
c.Env[EndpointKey] = piece
}
if off == 2 && piece[0] != '@' { //@开头是selector
c.Env[RowkeyKey] = piece
}
if off > 1 && piece[0] == '@' {
c.Env[SelectorKey] = piece
}
}
}
// real ip(处理在代理服务器之后的情况)
if rip := realIP(r); rip != "" {
c.Env[OriginalRemoteAddrKey] = r.RemoteAddr
r.RemoteAddr = rip
}
ac.IP = r.RemoteAddr
//init RESTContext
var rcErr error
var rc *RESTContext
rc, rcHolder, rcErr = RCHolder(*c, w, r)
rc.Access = ac
rc.Access.ReqLength = len(rc.RequestBody)
if rcErr != nil {
rc.RESTBadRequest(rcErr)
return
}
h.ServeHTTP(lw, r)
}
return http.HandlerFunc(fn)
}
/* }}} */
/* {{{ func Defer(c *web.C, h http.Handler) http.Handler
* recovers from panics
*/
func Defer(c *web.C, h http.Handler) http.Handler {
fn := func(w http.ResponseWriter, r *http.Request) {
rc := rcHolder(*c, w, r)
defer func() {
if err := recover(); err != nil {
rc.Critical("[%s %s] %v", r.Method, r.URL.Path, err)
//debug.PrintStack()
rc.Critical("%s", debug.Stack())
//http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
rc.HTTPError(http.StatusInternalServerError)
}
// save access log here
ac := rc.Access
ac.Duration = time.Now().Sub(ac.Time).String()
ac.Status = rc.Status
ac.OutHeader = w.Header()
ac.RepLength = rc.ContentLength
if sb := rc.GetEnv(SaveBodyKey); sb != nil && sb.(bool) == true {
//可以由应用程序决定是否记录body
ac.ReqBody = string(rc.RequestBody)
}
//ac.App = string(rc.RequestBody)
rc.Debug("[%s %s] end:%d in %s", ac.Method, ac.URI, ac.Status, ac.Duration)
// save access
rc.SaveAccess()
}()
h.ServeHTTP(w, r)
}
return http.HandlerFunc(fn)
}
/* }}} */
/* {{{ func Mime(c *web.C, h http.Handler) http.Handler
* mimetype相关处理
*/
func Mime(c *web.C, h http.Handler) http.Handler {
fn := func(w http.ResponseWriter, r *http.Request) {
rc := rcHolder(*c, w, r)
if cs := r.Header.Get(contentMD5); cs != "" {
rc.SetEnv(ContentMD5Key, cs)
}
// 看content-type
if ct := r.Header.Get(contentType); ct != "" {
rc.SetEnv(MimeTypeKey, ct)
}
if cd := r.Header.Get(contentDisposition); cd != "" {
//以传入的Disposition为主
if t, m, e := mime.ParseMediaType(cd); e == nil {
rc.Info("disposition: %s, mediatype: %s", cd, t)
rc.SetEnv(DispositionMTKey, t)
//if fname, ok := m["filename"]; ok {
// if mt := mime.TypeByExtension(filepath.Ext(fname)); mt != "" {
// rc.SetEnv(MimeTypeKey, mt)
// }
//}
for k, v := range m {
dk := DispositionPrefix + k + "_"
rc.Debug("disposition key: %s, value: %v", dk, v)
rc.SetEnv(dk, v)
}
}
}
h.ServeHTTP(w, r)
}
return http.HandlerFunc(fn)
}
/* }}} */
/* {{{ func ParseParams(c *web.C, h http.Handler) http.Handler {
*
*/
func ParseParams(c *web.C, h http.Handler) http.Handler {
fn := func(w http.ResponseWriter, r *http.Request) {
rc := rcHolder(*c, w, r)
// 解析参数
r.ParseForm()
// 根据ogo规则解析参数
var cType int
var p, pp string
rc.setTimeRangeFromStartEnd()
for k, v := range r.Form {
rc.Trace("key: %s, value: %s", k, v)
//根据参数名第一个字符来判断条件类型
prefix := k[0] //param prefix
switch prefix {
case _PPREFIX_NOT:
rc.Trace("having prefix not: %s", k)
k = k[1:]
cType = _CTYPE_NOT
rc.Trace("key change to: %s, condition type: %d", k, cType)
case _PPREFIX_LIKE:
k = k[1:]
cType = _CTYPE_LIKE
default:
cType = _CTYPE_IS
// do nothing
}
switch k { //处理参数
case _PARAM_DATE:
rc.setTimeRangeFromDate(v)
case _PARAM_ORDERBY:
rc.setOrderBy(v)
case _PARAM_FIELDS:
//过滤字段
rc.SetEnv(FieldsKey, v)
case _PARAM_PERPAGE:
if len(v) > 0 {
pp = v[0]
}
case _PARAM_PAGE: //分页信息
if len(v) > 0 {
p = v[0]
}
default:
//除了以上的特别字段,其他都是条件查询
var cv interface{}
var con, jc *Condition
var err error
if len(v) > 1 {
cv = v
} else {
//cv = v[0]
//处理逗号情况
if strings.Contains(v[0], ",") {
cv = strings.Split(v[0], ",")
} else {
cv = v[0]
}
}
//如果参数中包含".",代表有关联查询
if strings.Contains(k, ".") {
js := strings.SplitN(k, ".", 2)
if js[0] != "" && js[1] != "" {
k = js[0]
jc = new(Condition)
jc.Field = js[1]
switch cType {
case _CTYPE_IS:
jc.Is = cv
case _CTYPE_NOT:
jc.Not = cv
case _CTYPE_LIKE:
jc.Like = cv
default:
}
//查询类型变为join
rc.Trace("join: %s, %s; con: %v", k, jc.Field, jc)
cType = _CTYPE_JOIN
}
}
if con, err = rc.GetCondition(k); err != nil {
//没有这个condition,初始化
con = new(Condition)
rc.setCondition(k, con)
}
con.Field = k
switch cType {
case _CTYPE_IS:
con.Is = cv
case _CTYPE_NOT:
con.Not = cv
case _CTYPE_LIKE:
con.Like = cv
case _CTYPE_JOIN:
rc.Trace("field: %s, join condition: %v", k, jc)
con.Join = jc
default:
}
rc.Trace("con: %v", con)
}
}
//记录分页信息
rc.SetEnv(PaginationKey, NewPagination(p, pp))
h.ServeHTTP(w, r)
}
return http.HandlerFunc(fn)
}
/* }}} */
/* {{{ func realIP(r *http.Request) string
* 获取真实IP
*/
func realIP(r *http.Request) string {
var ip string
if xff := r.Header.Get(xForwardedFor); xff != "" {
i := strings.Index(xff, ", ")
if i == -1 {
i = len(xff)
}
ip = xff[:i]
} else if xrip := r.Header.Get(xRealIP); xrip != "" {
ip = xrip
}
return ip
}
/* }}} */