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restApi.go
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restApi.go
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package main
import (
"fmt"
"log"
"net/http"
"github.com/gorilla/mux"
db "gopkg.in/gorethink/gorethink.v4"
config "restApi/config" //get database connection
"encoding/json"
)
var session *db.Session = config.GetSession()
type Person struct {
Id string `gorethink:"id,omitempty"`
Name string `gorethink:"name"`
Place string `gorethink:"place"`
}
func main() {
router := mux.NewRouter().StrictSlash(true)
router.HandleFunc("/", Index)
router.HandleFunc("/get", Get)
router.HandleFunc("/insert", Insert)
router.HandleFunc("/update", Update).Methods("POST")
router.HandleFunc("/delete/{id}", Delete)
log.Fatal(http.ListenAndServe(":8081", router))
}
func Index(w http.ResponseWriter, r *http.Request) {
createTable(w)
fmt.Fprintf(w, "Rest Api Golang")
}
func Get(w http.ResponseWriter, r *http.Request) {
fetchAllRecords(w)
recordCount(w)
}
func Insert(w http.ResponseWriter, r *http.Request) {
id := insertRecord(w)
printStr(w, id)
recordCount(w)
}
func Update(w http.ResponseWriter, r *http.Request) {
id := r.FormValue("id")
if id != "" {
// Update a record
updateRecord(w, id)
}
recordCount(w)
}
func Delete(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
if vars["id"] != "" {
// Delete a record
deleteRecord(w, vars["id"])
}
recordCount(w)
}
func createTable(w http.ResponseWriter) interface{} {
result, err := db.DB("test").TableCreate("people").RunWrite(session)
if err != nil {
fmt.Println(err)
}
printStr(w, "*** Create table result: ***")
printObj(w, result)
printStr(w, "\n")
return result
}
func insertRecord(w http.ResponseWriter) string {
var data = map[string]interface{}{
"Name": "David Davidson",
"Place": "Somewhere",
}
result, err := db.Table("people").Insert(data).RunWrite(session)
if err != nil {
fmt.Println(err)
return ""
}
printStr(w, "*** Insert result: ***")
printObj(w, result)
printStr(w, "\n")
return result.GeneratedKeys[0]
}
func updateRecord(w http.ResponseWriter, id string) {
var data = map[string]interface{}{
"Name": "Steve Stevenson",
"Place": "Anywhere",
}
result, err := db.Table("people").Get(id).Update(data).RunWrite(session)
if err != nil {
fmt.Println(err)
return
}
printStr(w, "*** Update result: ***")
printObj(w, result)
printStr(w, "\n")
}
func fetchOneRecord(w http.ResponseWriter) {
cursor, err := db.Table("people").Run(session)
if err != nil {
fmt.Println(err)
return
}
var person interface{}
cursor.One(&person)
cursor.Close()
printStr(w, "*** Fetch one record: ***")
printObj(w, person)
printStr(w, "\n")
}
func recordCount(w http.ResponseWriter) {
cursor, err := db.Table("people").Count().Run(session)
if err != nil {
fmt.Println(err)
return
}
var cnt int
cursor.One(&cnt)
cursor.Close()
printStr(w, "*** Count: ***")
printObj(w, cnt)
printStr(w, "\n")
}
func fetchAllRecords(w http.ResponseWriter) {
rows, err := db.Table("people").Run(session)
if err != nil {
fmt.Println(err)
return
}
// Read records into persons slice
var persons []Person
err2 := rows.All(&persons)
if err2 != nil {
fmt.Println(err2)
return
}
printStr(w, "*** Fetch all rows: ***")
for _, p := range persons {
printObj(w, p)
}
printStr(w, "\n")
}
func deleteRecord(w http.ResponseWriter, id string) {
result, err := db.Table("people").Get(id).Delete().Run(session)
if err != nil {
fmt.Println(err)
return
}
printStr(w, "*** Delete result: ***")
printObj(w, result)
printStr(w, "\n")
}
func printStr(w http.ResponseWriter, v string) {
//response to api
fmt.Fprintf(w, v)
//response to console
fmt.Println(v)
}
func printObj(w http.ResponseWriter, v interface{}) {
vBytes, _ := json.Marshal(v)
//response to api
json.NewEncoder(w).Encode(v)
//response to console
fmt.Println(string(vBytes))
}