Go simple read database

/* go-sqlite3 is cgo package. If you want to build your app using go-sqlite3, you need gcc. However, after you have built and installed go-sqlite3 with go install github.com/mattn/go-sqlite3 (which requires gcc), you can build your app without relying on gcc in future. Important: because this is a CGO enabled package, you are required to set the environment variable CGO_ENABLED=1 and have a gcc compile present within your path. */

package main

import (
	"database/sql"
	"fmt"
	"io"
	"log"
	"net/http"

	_ "github.com/mattn/go-sqlite3"
)

var databasePath = "./data.db3"

type SoInfo struct {
    
	id          int
	build_id    int
	branch      string
	resversion  string
	currenttime string
}

func checkError(err error) {
    
	if err != nil {
    
		log.Fatal(err)
	}
}

func handler(w http.ResponseWriter, r *http.Request) {
    
	r.ParseForm()
	if len(r.Form) > 0 {
    
		job_name := r.Form.Get("job_name")
		if len(job_name) != 0 {
    
			db, err := sql.Open("sqlite3", databasePath)
			checkError(err)
			defer db.Close()

			sql := fmt.Sprintf("select id,build_id,branch,resversion,currenttime from so_records where job_name='%s' order by cast(build_id as '999999') desc limit 20", job_name)
			rows, err := db.Query(sql)
			checkError(err)
			defer rows.Close()
			for rows.Next() {
    
				var line SoInfo
				rows.Scan(&line.id, &line.build_id, &line.branch, &line.resversion, &line.currenttime)
				stringLine := fmt.Sprintf("BuildID: %d | BRANCH: %s | RESVERSION:%s | Time: %s | ID: %d\n", line.build_id, line.branch, line.resversion, line.currenttime, line.id)
				io.WriteString(w, stringLine)
			}
		}
	}
}

func main() {
    
	http.HandleFunc("/findso", handler)
	err := http.ListenAndServe(":8080", nil)
	if err != nil {
    
		log.Fatal("ListenAndServe: ", err)
	}
}