/
main.go
145 lines (111 loc) · 2.77 KB
/
main.go
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package main
import (
"database/sql"
"fmt"
"io"
"net/http"
_ "github.com/go-sql-driver/mysql"
)
var db *sql.DB
var err error
func main() {
db, err = sql.Open("mysql", "awsuser:mypassword@tcp(mydbinstance.cakwl95bxza0.us-west-1.rds.amazonaws.com:3306)/test02?charset=utf8")
check(err)
defer db.Close()
err = db.Ping()
check(err)
http.HandleFunc("/", index)
http.HandleFunc("/amigos", amigos)
http.HandleFunc("/create", create)
http.HandleFunc("/insert", insert)
http.HandleFunc("/read", read)
http.HandleFunc("/update", update)
http.HandleFunc("/delete", del)
http.HandleFunc("/drop", drop)
http.Handle("/favicon.ico", http.NotFoundHandler())
err := http.ListenAndServe(":8080", nil)
check(err)
}
func index(w http.ResponseWriter, req *http.Request) {
_, err := io.WriteString(w, "at index")
check(err)
}
func amigos(w http.ResponseWriter, req *http.Request) {
rows, err := db.Query(`SELECT aName FROM amigos;`)
check(err)
defer rows.Close()
// data to be used in query
var s, name string
s = "RETRIEVED RECORDS:\n"
// query
for rows.Next() {
err = rows.Scan(&name)
check(err)
s += name + "\n"
}
fmt.Fprintln(w, s)
}
func create(w http.ResponseWriter, req *http.Request) {
stmt, err := db.Prepare(`CREATE TABLE customer (name VARCHAR(20));`)
check(err)
defer stmt.Close()
r, err := stmt.Exec()
check(err)
n, err := r.RowsAffected()
check(err)
fmt.Fprintln(w, "CREATED TABLE customer", n)
}
func insert(w http.ResponseWriter, req *http.Request) {
stmt, err := db.Prepare(`INSERT INTO customer VALUES ("James");`)
check(err)
defer stmt.Close()
r, err := stmt.Exec()
check(err)
n, err := r.RowsAffected()
check(err)
fmt.Fprintln(w, "INSERTED RECORD", n)
}
func read(w http.ResponseWriter, req *http.Request) {
rows, err := db.Query(`SELECT * FROM customer;`)
check(err)
defer rows.Close()
var name string
for rows.Next() {
err = rows.Scan(&name)
check(err)
fmt.Fprintln(w, "RETRIEVED RECORD:", name)
}
}
func update(w http.ResponseWriter, req *http.Request) {
stmt, err := db.Prepare(`UPDATE customer SET name="Jimmy" WHERE name="James";`)
check(err)
defer stmt.Close()
r, err := stmt.Exec()
check(err)
n, err := r.RowsAffected()
check(err)
fmt.Fprintln(w, "UPDATED RECORD", n)
}
func del(w http.ResponseWriter, req *http.Request) {
stmt, err := db.Prepare(`DELETE FROM customer WHERE name="Jimmy";`)
check(err)
defer stmt.Close()
r, err := stmt.Exec()
check(err)
n, err := r.RowsAffected()
check(err)
fmt.Fprintln(w, "DELETED RECORD", n)
}
func drop(w http.ResponseWriter, req *http.Request) {
stmt, err := db.Prepare(`DROP TABLE customer;`)
check(err)
defer stmt.Close()
_, err = stmt.Exec()
check(err)
fmt.Fprintln(w, "DROPPED TABLE customer")
}
func check(err error) {
if err != nil {
fmt.Println(err)
}
}