/
godevicedetect.go
203 lines (182 loc) · 5.38 KB
/
godevicedetect.go
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package godevicedetect
import (
"encoding/json"
"fmt"
"hash/crc32"
"log"
"net/http"
"strings"
"github.com/Shaked/godevicedetect/platform"
"github.com/Shaked/user-agents/packages/go/gouseragents"
"github.com/gorilla/context"
)
const (
UnknownOs = "UnknownOs"
UnknownVersion = "UnknownVersion"
)
type PreCompiledHandler struct{}
type Compiled struct {
hashFunc string
userAgents map[string]platform.Device
}
//func() platform.Device
func (p *PreCompiledHandler) compile() *Compiled {
type BrowserX struct {
Name string `json:name,string,omitempty`
Version json.Number `json:version,Number,omitempty`
}
type EngineX struct {
Name string `json:name,string,omitempty`
Version json.Number `json:version,Number,omitempty`
}
type PlatformX struct {
Name string `json:name,string,omitempty`
Version json.Number `json:version,Number,omitempty`
Build string `json:build,string,omitempty`
Model string `json:model,string,omitempty`
}
type X struct {
Brand string `json:brand,string,omitempty`
Type string `json:type,string,omitempty`
Platform *PlatformX `json:platform,omitempty`
Engine *EngineX `json:engine,omitempty`
Browsers []*BrowserX `json:browsers,omitempty`
Browser *BrowserX `json:browser,omitempty`
}
v := struct {
Meta map[string]string `json:meta,omitempty`
UserAgents map[string]X `json:userAgents,omitempty`
}{}
err := json.Unmarshal([]byte(gouseragents.CompiledUserAgents), &v)
if nil != err {
panic(err)
}
c := &Compiled{}
hash := v.Meta["hash"]
c.hashFunc = hash
userAgents := map[string]platform.Device{}
var device platform.Device
for key, deviceInfo := range v.UserAgents {
deviceName := deviceInfo.Brand
switch deviceInfo.Type {
case "desktop":
device = platform.NewDesktop(deviceName)
if nil != deviceInfo.Platform {
device.SetPlatform(platform.NewPlatform(
deviceInfo.Platform.Name,
string(deviceInfo.Platform.Version),
))
}
break
case "tv":
device = platform.NewTv(deviceName)
break
case "tablet":
device = platform.NewTablet(deviceName)
break
case "app":
case "mobile":
device = platform.NewMobile(deviceName)
if nil != deviceInfo.Platform {
a := platform.NewPlatform(
deviceInfo.Platform.Name,
string(deviceInfo.Platform.Version),
)
a.SetBuild(string(deviceInfo.Platform.Build))
a.SetModel(string(deviceInfo.Platform.Model))
device.SetPlatform(a)
}
case "bot":
device = platform.NewBot(deviceName)
break
case "glass":
device = platform.NewGlass(deviceName)
break
default:
panic("WTF :" + deviceInfo.Type)
}
userAgents[key] = device
}
c.userAgents = userAgents
return c
}
type DeviceDetect struct {
r *http.Request
meta *Compiled
}
func NewDeviceDetect(r *http.Request, p *PreCompiledHandler) *DeviceDetect {
meta := p.compile()
return &DeviceDetect{r: r, meta: meta}
}
func (d *DeviceDetect) FindByUserAgent(userAgent string) platform.Device {
key := UserAgentToKey(strings.ToLower(userAgent))
f, ok := d.meta.userAgents[fmt.Sprint(key)]
if ok {
return f
}
log.Println("Unknown")
return platform.NewUnknown(userAgent)
}
func (d *DeviceDetect) PlatformType() platform.Device {
return d.FindByUserAgent(d.r.Header.Get("User-Agent"))
}
// Vars returns the route variables for the current request, if any.
func Platform(r *http.Request) platform.Device {
rv := context.Get(r, "Platform")
device := rv.(platform.Device)
return device
}
type PlatformHandler interface {
Mobile(w http.ResponseWriter, r *http.Request, d *platform.DeviceMobile)
Tablet(w http.ResponseWriter, r *http.Request, d *platform.DeviceTablet)
Desktop(w http.ResponseWriter, r *http.Request, d *platform.DeviceDesktop)
Tv(w http.ResponseWriter, r *http.Request, d *platform.DeviceTv)
Watch(w http.ResponseWriter, r *http.Request, d *platform.DeviceWatch)
Bot(w http.ResponseWriter, r *http.Request, d *platform.DeviceBot)
Glass(w http.ResponseWriter, r *http.Request, d *platform.DeviceGlass)
Unknown(w http.ResponseWriter, r *http.Request, d *platform.DeviceUnknown)
}
func Handler(h PlatformHandler, p *PreCompiledHandler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
m := NewDeviceDetect(r, p)
d := m.FindByUserAgent(r.Header.Get("User-Agent"))
switch t := m.PlatformType().(type) {
case *platform.DeviceTablet:
h.Tablet(w, r, d.(*platform.DeviceTablet))
break
case *platform.DeviceMobile:
h.Mobile(w, r, d.(*platform.DeviceMobile))
break
case *platform.DeviceTv:
h.Tv(w, r, d.(*platform.DeviceTv))
break
case *platform.DeviceWatch:
h.Watch(w, r, d.(*platform.DeviceWatch))
break
case *platform.DeviceDesktop:
h.Desktop(w, r, d.(*platform.DeviceDesktop))
break
case *platform.DeviceBot:
h.Bot(w, r, d.(*platform.DeviceBot))
break
case *platform.DeviceGlass:
h.Glass(w, r, d.(*platform.DeviceGlass))
break
case *platform.DeviceUnknown:
h.Unknown(w, r, d.(*platform.DeviceUnknown))
break
default:
panic(fmt.Sprintf("Type %v doesn't exist", t))
}
})
}
func HandlerMux(s *http.ServeMux, p *PreCompiledHandler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
m := NewDeviceDetect(r, p)
context.Set(r, "Platform", m.PlatformType())
s.ServeHTTP(w, r)
})
}
func UserAgentToKey(userAgent string) uint32 {
return crc32.ChecksumIEEE([]byte(userAgent))
}