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context_accept.go
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/
context_accept.go
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package echo
import (
"strings"
"github.com/webx-top/echo/param"
)
var (
acceptFlagComma = ','
acceptFlagSemicolon = ';'
acceptFlagSlash = '/'
acceptFlagPlus = '+'
acceptFlagDot = '.'
acceptFlagWhitespace = ' '
acceptFlagEqual = '='
)
func NewAccepts(accept string) *Accepts {
a := &Accepts{Raw: accept}
return a
}
type Accepts struct {
Raw string
Type []*Accept
Params param.StringMap
}
func (a *Accepts) Simple(n int) *Accepts {
accept := strings.SplitN(a.Raw, `;`, 2)[0]
accepts := strings.SplitN(accept, `,`, n)
a.Type = make([]*Accept, len(accepts))
for k, r := range accepts {
c := NewAccept()
c.Raw = strings.TrimSpace(r)
c.Mime = c.Raw
a.Type[k] = c
}
return a
}
func (a *Accepts) Advance() *Accepts {
var (
r []rune
c = NewAccept()
isVendor bool
subtype []rune
rootype []rune
stared bool
)
cleanUp := func() {
if c == nil {
return
}
c.Subtype = append(c.Subtype, string(subtype))
c.Mime = c.Type + `/` + string(r)
c.Raw = string(rootype)
isVendor = false
stared = false
a.Type = append(a.Type, c)
c = NewAccept()
r = []rune{}
subtype = []rune{}
rootype = []rune{}
}
//application/vnd.example.v2+json
//application/json, text/javascript, */*; q=0.01
for _, v := range a.Raw {
if v == acceptFlagWhitespace {
continue
}
if v == acceptFlagSlash { // /
c.Type = string(r)
r = []rune{}
stared = true
subtype = []rune{}
rootype = append(rootype, v)
continue
}
if v == acceptFlagDot { // .
s := string(r)
if s == `vnd` {
isVendor = true
} else {
if isVendor {
c.Vendor = append(c.Vendor, s)
} else {
subtype = append(subtype, v)
}
}
r = []rune{}
rootype = append(rootype, v)
continue
}
if v == acceptFlagPlus { // +
if isVendor {
c.Vendor = append(c.Vendor, string(r))
} else {
c.Subtype = append(c.Subtype, string(subtype))
}
isVendor = false
r = []rune{}
subtype = []rune{}
rootype = append(rootype, v)
continue
}
if v == acceptFlagComma { // ,
cleanUp()
continue
}
if v == acceptFlagSemicolon { // ;
cleanUp()
c = nil
break
}
r = append(r, v)
if stared {
subtype = append(subtype, v)
}
rootype = append(rootype, v)
}
cleanUp()
return a
}
type Accept struct {
Raw string
Type string
Subtype []string
Mime string
Vendor []string
}
func NewAccept() *Accept {
return &Accept{}
}