simple go crud api

Gopkg.lock

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+# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'.
+
+
+[[projects]]
+  digest = "1:58c033da727ebd5a6769209e479cac9a6e4dab53c879631af3d8161423099d57"
+  name = "github.com/go-chi/chi"
+  packages = [
+    ".",
+    "middleware",
+  ]
+  pruneopts = "UT"
+  revision = "da24bba8dcd4021cafac38724bf10dccc97c3e36"
+  version = "v4.0.2"
+
+[[projects]]
+  digest = "1:ec6f9bf5e274c833c911923c9193867f3f18788c461f76f05f62bb1510e0ae65"
+  name = "github.com/go-sql-driver/mysql"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "72cd26f257d44c1114970e19afddcd812016007e"
+  version = "v1.4.1"
+
+[[projects]]
+  digest = "1:c25289f43ac4a68d88b02245742347c94f1e108c534dda442188015ff80669b3"
+  name = "google.golang.org/appengine"
+  packages = ["cloudsql"]
+  pruneopts = "UT"
+  revision = "b2f4a3cf3c67576a2ee09e1fe62656a5086ce880"
+  version = "v1.6.1"
+
+[solve-meta]
+  analyzer-name = "dep"
+  analyzer-version = 1
+  input-imports = [
+    "github.com/go-chi/chi",
+    "github.com/go-chi/chi/middleware",
+    "github.com/go-sql-driver/mysql",
+  ]
+  solver-name = "gps-cdcl"
+  solver-version = 1

Gopkg.toml

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+# Gopkg.toml example
+#
+# Refer to https://golang.github.io/dep/docs/Gopkg.toml.html
+# for detailed Gopkg.toml documentation.
+#
+# required = ["github.com/user/thing/cmd/thing"]
+# ignored = ["github.com/user/project/pkgX", "bitbucket.org/user/project/pkgA/pkgY"]
+#
+# [[constraint]]
+#   name = "github.com/user/project"
+#   version = "1.0.0"
+#
+# [[constraint]]
+#   name = "github.com/user/project2"
+#   branch = "dev"
+#   source = "github.com/myfork/project2"
+#
+# [[override]]
+#   name = "github.com/x/y"
+#   version = "2.4.0"
+#
+# [prune]
+#   non-go = false
+#   go-tests = true
+#   unused-packages = true
+
+
+[[constraint]]
+  name = "github.com/go-chi/chi"
+  version = "4.0.2"
+
+[[constraint]]
+  name = "github.com/go-sql-driver/mysql"
+  version = "1.4.1"
+
+[prune]
+  go-tests = true
+  unused-packages = true

helpers.go

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+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"time"
+)
+
+func catch(err error) {
+	if err != nil {
+		panic(err)
+	}
+}
+
+func respondWithError(w http.ResponseWriter, code int, msg string) {
+	respondwithJSON(w, code, map[string]string{"message": msg})
+}
+
+func respondwithJSON(w http.ResponseWriter, code int, payload interface{}) {
+	response, _ := json.Marshal(payload)
+	fmt.Println(payload)
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(code)
+	w.Write(response)
+}
+
+// Logger ...
+func Logger() http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		fmt.Println(time.Now(), r.Method, r.URL)
+		router.ServeHTTP(w, r)
+	})
+}

main.go

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+package main
+
+import (
+	"database/sql"
+	"encoding/json"
+	"fmt"
+	"net/http"
+
+	"github.com/go-chi/chi"
+	"github.com/go-chi/chi/middleware"
+	_ "github.com/go-sql-driver/mysql"
+)
+
+var router *chi.Mux
+var db *sql.DB
+
+const (
+	dbName = "go-mysql-crud"
+	dbPass = ""
+	dbHost = "localhost"
+	dbPort = "3306"
+)
+
+func routers() *chi.Mux {
+	router.Get("/posts", AllPosts)
+	router.Get("/posts/{id}", DetailPost)
+	router.Post("/posts", CreatePost)
+	router.Put("/posts/{id}", UpdatePost)
+	router.Delete("/posts/{id}", DeletePost)
+
+	return router
+}
+
+func init() {
+	router = chi.NewRouter()
+	router.Use(middleware.Recoverer)
+
+	dbSource := fmt.Sprintf("root:%s@tcp(%s:%s)/%s?charset=utf8", dbPass, dbHost, dbPort, dbName)
+	fmt.Println(dbSource)
+	var err error
+	db, err = sql.Open("mysql", dbSource)
+
+	catch(err)
+}
+
+// Post ...
+type Post struct {
+	ID      int    `json:"id"`
+	Title   string `json:"title"`
+	Content string `json:"content"`
+}
+
+// CreatePost ...
+func CreatePost(w http.ResponseWriter, r *http.Request) {
+	var post Post
+	json.NewDecoder(r.Body).Decode(&post)
+
+	query, err := db.Prepare("Insert posts SET title=?, content=?")
+	catch(err)
+
+	_, er := query.Exec(post.Title, post.Content)
+	catch(er)
+	defer query.Close()
+
+	respondwithJSON(w, http.StatusCreated, map[string]string{"message": "successfully created"})
+}
+
+// UpdatePost ...
+func UpdatePost(w http.ResponseWriter, r *http.Request) {
+	var post Post
+	id := chi.URLParam(r, "id")
+	json.NewDecoder(r.Body).Decode(&post)
+
+	query, err := db.Prepare("Update posts set title=?, content=? where id=?")
+	catch(err)
+	_, er := query.Exec(post.Title, post.Content, id)
+	catch(er)
+
+	defer query.Close()
+
+	respondwithJSON(w, http.StatusOK, map[string]string{"message": "update successfully"})
+}
+
+// DeletePost ...
+func DeletePost(w http.ResponseWriter, r *http.Request) {
+	id := chi.URLParam(r, "id")
+
+	query, err := db.Prepare("delete from post where id=?")
+	catch(err)
+	_, er := query.Exec(id)
+	catch(er)
+	query.Close()
+
+	respondwithJSON(w, http.StatusOK, map[string]string{"message": "deleted successfully"})
+}
+
+// AllPosts ...
+func AllPosts(w http.ResponseWriter, r *http.Request) {
+	errors := []error{}
+	payload := []Post{}
+
+	rows, err := db.Query("Select id, title, content From posts")
+	catch(err)
+
+	defer rows.Close()
+
+	for rows.Next() {
+		data := Post{}
+
+		er := rows.Scan(&data.ID, &data.Title, &data.Content)
+
+		if er != nil {
+			errors = append(errors, er)
+		}
+		payload = append(payload, data)
+	}
+
+	respondwithJSON(w, http.StatusOK, payload)
+}
+
+// DetailPost ...
+func DetailPost(w http.ResponseWriter, r *http.Request) {
+	payload := Post{}
+	id := chi.URLParam(r, "id")
+
+	row := db.QueryRow("Select if, title, content From posts where id=?", id)
+
+	err := row.Scan(
+		&payload.ID,
+		&payload.Title,
+		&payload.Content,
+	)
+
+	if err != nil {
+		respondWithError(w, http.StatusNotFound, "no rows in result set")
+		return
+	}
+
+	respondwithJSON(w, http.StatusOK, payload)
+}
+
+//
+func main() {
+	routers()
+	http.ListenAndServe(":8005", Logger())
+}