OpenMediaCenter/apiGo/api/ApiBase.go

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package api
import (
"bytes"
"encoding/json"
"fmt"
"gopkg.in/oauth2.v3"
"net/http"
"openmediacenter/apiGo/api/oauth"
)
const APIPREFIX = "/api"
const (
VideoNode = iota
TagNode = iota
SettingsNode = iota
ActorNode = iota
TVShowNode = iota
)
type HandlerInfo struct {
ID string
Token string
Data map[string]interface{}
}
type actionStruct struct {
Action string
}
type Handler struct {
action string
handler func(info *HandlerInfo) []byte
apiNode int
}
var handlers = make(map[string]Handler)
func AddHandler(action string, apiNode int, h func(info *HandlerInfo) []byte) {
// append new handler to the handlers
handlers[fmt.Sprintf("%s/%d", action, apiNode)] = Handler{action, h, apiNode}
}
func ServerInit() {
http.Handle(APIPREFIX+"/video", oauth.ValidateToken(handlefunc, VideoNode))
http.Handle(APIPREFIX+"/tags", oauth.ValidateToken(handlefunc, TagNode))
http.Handle(APIPREFIX+"/settings", oauth.ValidateToken(handlefunc, SettingsNode))
http.Handle(APIPREFIX+"/actor", oauth.ValidateToken(handlefunc, ActorNode))
http.Handle(APIPREFIX+"/tvshow", oauth.ValidateToken(handlefunc, TVShowNode))
// initialize oauth service and add corresponding auth routes
oauth.InitOAuth()
}
func handleAPICall(action string, requestBody string, apiNode int, info *HandlerInfo) []byte {
handler, ok := handlers[fmt.Sprintf("%s/%d", action, apiNode)]
if !ok {
// handler doesn't exist!
fmt.Printf("no handler found for Action: %d/%s\n", apiNode, action)
return nil
}
// check if info even exists
if info == nil {
info = &HandlerInfo{}
}
// parse the arguments
var args map[string]interface{}
err := json.Unmarshal([]byte(requestBody), &args)
if err != nil {
fmt.Printf("failed to decode arguments of action %s :: %s\n", action, requestBody)
} else {
// check if map has an action
if _, ok := args["action"]; ok {
delete(args, "action")
}
info.Data = args
}
// call the handler
return handler.handler(info)
}
func handlefunc(rw http.ResponseWriter, req *http.Request, node int, tokenInfo *oauth2.TokenInfo) {
// only allow post requests
if req.Method != "POST" {
return
}
buf := new(bytes.Buffer)
buf.ReadFrom(req.Body)
body := buf.String()
var t actionStruct
err := json.Unmarshal([]byte(body), &t)
if err != nil {
fmt.Println("failed to read action from request! :: " + body)
}
// load userid from received token object
id := (*tokenInfo).GetClientID()
userinfo := &HandlerInfo{
ID: id,
Token: (*tokenInfo).GetCode(),
}
rw.Write(handleAPICall(t.Action, body, node, userinfo))
}