サーバーをgolang+MongoDBでフロントをVue.js
基本的な処理を色々メモ。
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package main import ( "encoding/json" "fmt" "html/template" "io/ioutil" "log" "net/http" "os" "path/filepath" "gopkg.in/mgo.v2" ) func JsonMongo1(w http.ResponseWriter, r *http.Request) { info := &mgo.DialInfo{ Addrs: []string{"localhost:27017"}, Database: "name_store", Username: "shiro", Password: "123", Source: "admin", } //通常 //session, err := mgo.Dial("localhost:27017") //認証 session, err := mgo.DialWithInfo(info) if err != nil { return } defer session.Close() c := session.DB("name_store").C("names") t := []T{} //1件取得 //if err := c.Find(bson.M{"name": "taro"}).One(&t); != nil{ // log.Print(err) //} if err := c.Find(nil).All(&t); err != nil { log.Print(err) } w.Header().Set("content-type", "application/json;charset=UTF-8") w.WriteHeader(http.StatusOK) if err := json.NewEncoder(w).Encode(t); err != nil { return } } func TemplateHtml(w http.ResponseWriter, r *http.Request) { p, err := os.Executable() if err != nil { return } t := template.Must(template.ParseFiles(filepath.FromSlash(filepath.Dir(p) + "/index.html"))) if err := t.Execute(w, nil); err != nil { return } } func TemplateText(w http.ResponseWriter, r *http.Request) { p, err := os.Executable() if err != nil { return } f, err := ioutil.ReadFile(filepath.FromSlash(filepath.Dir(p) + "/vue.html")) if err != nil { return } fmt.Fprint(w, string(f)) } func FromPost(w http.ResponseWriter, r *http.Request) { info := &mgo.DialInfo{ Addrs: []string{"localhost:27017"}, Database: "name_store", Username: "shiro", Password: "123", Source: "admin", } body, err := ioutil.ReadAll(r.Body) if err != nil { log.Print(err) } t := []T{} if err := json.Unmarshal(body, &t); err != nil { log.Print(err) } //認証 session, err := mgo.DialWithInfo(info) if err != nil { log.Print(err) } defer session.Close() c := session.DB("name_store").C("names") err = c.Insert(&t[0]) if err != nil { log.Print(err) } } func main() { http.HandleFunc("/1", RequestParams) http.HandleFunc("/2", QueryKeyValue) http.HandleFunc("/3", ResponseJson) http.HandleFunc("/4", JsonMongo1) http.HandleFunc("/5", TemplateHtml) http.HandleFunc("/6", TemplateText) http.HandleFunc("/7", FromPost) if err := http.ListenAndServe(":9000", nil); err != nil { log.Fatal(err) } } func RequestParams(w http.ResponseWriter, r *http.Request) { if r.Method != http.MethodGet { return } fmt.Fprintf(w, "%s\n", r.URL.Host) fmt.Fprintf(w, "%s\n", r.URL.Path) fmt.Fprintf(w, "%s\n", r.URL.RawQuery) } func QueryKeyValue(w http.ResponseWriter, r *http.Request) { if r.Method != http.MethodGet { return } for key, value := range r.URL.Query() { fmt.Fprintf(w, "key: %s\n", key) for i, v := range value { fmt.Fprintf(w, "value[%d]: %s\n", i, v) } } } type T struct { ID json.Number Name string } func ResponseJson(w http.ResponseWriter, r *http.Request) { t := T{ ID: "1", Name: "taro", } w.Header().Set("content-type", "application/json;charset=UTF-8") w.WriteHeader(http.StatusOK) if err := json.NewEncoder(w).Encode(t); err != nil { return } } |
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<!DOCTYPE html> <html> <head> <meta charset="UTF-8" /> <title>title</title> <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script> <script src="https://unpkg.com/axios/dist/axios.min.js"></script> </head> <body> <div id="app"> <input type="button" v-on:click="fetchData" value="Get"> <input type="button" v-on:click="insertData" value="Up"> <br> <table> <tr v-for="i in res" v-bind:id="i.ID"> <td>{{ i.ID }}</td> <td>{{ i.Name }}</td> </tr> </table> <input type="text" v-bind:value="v"> <input type="range" max="1" min="0" step="0.25" v-model="v"> </div> <script> let vm = new Vue({ el: '#app', data:{ v: 0, res: [ {"ID":1, "Name":"taro"}, {"ID":2, "Name":"jiro"} ] }, methods:{ insertData(){ console.log(vm.res); axios .post('http://localhost:9000/7',vm.res) .then(response => { console.log(response.status) }) }, fetchData(){ axios .get('http://localhost:9000/4') .then(response => { //forceUpdateでリアクティブになる //vm.res[1] = response.data; //vm.$forceUpdate(); console.log(response.status) //vm.resは配列 //レスポンスのjsonが配列ではない場合の指定の方法 //Vue.set(vm.res, 1, response.data); //配列の場合の指定の方法(vm.resが全て置き換わる) Vue.set(vm, 'res', response.data) }) } } }) </script> </body> </html> |