128 lines
2.7 KiB
Go
128 lines
2.7 KiB
Go
package v1
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import (
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"fmt"
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"io"
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"io/ioutil"
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"log"
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"os"
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"os/exec"
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"syscall"
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"time"
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"github.com/osuripple/api/common"
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)
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// MetaRestartGET restarts the API with Zero Downtime™.
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func MetaRestartGET(md common.MethodData) (r common.Response) {
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proc, err := os.FindProcess(syscall.Getpid())
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if err != nil {
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r.Code = 500
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r.Message = "couldn't find process. what the fuck?"
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return
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}
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r.Code = 200
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r.Message = "brb"
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go func() {
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time.Sleep(time.Second)
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proc.Signal(syscall.SIGUSR2)
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}()
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return
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}
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// MetaKillGET kills the API process. NOTE TO EVERYONE: NEVER. EVER. USE IN PROD.
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// Mainly created because I couldn't bother to fire up a terminal, do htop and kill the API each time.
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func MetaKillGET(md common.MethodData) (r common.Response) {
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proc, err := os.FindProcess(syscall.Getpid())
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if err != nil {
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r.Code = 500
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r.Message = "couldn't find process. what the fuck?"
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return
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}
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const form = "02/01/2006"
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r.Code = 200
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// yes
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r.Message = fmt.Sprintf("RIP ripple API %s - %s", upSince.Format(form), time.Now().Format(form))
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go func() {
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time.Sleep(time.Second)
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proc.Kill()
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}()
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return
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}
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var upSince time.Time
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// MetaUpSinceGET retrieves the moment the API application was started.
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// Mainly used to get if the API was restarted.
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func MetaUpSinceGET(md common.MethodData) common.Response {
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return common.Response{
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Code: 200,
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Data: upSince.UnixNano(),
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}
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}
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// MetaUpdateGET updates the API to the latest version, and restarts it.
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func MetaUpdateGET(md common.MethodData) common.Response {
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if f, err := os.Stat(".git"); err == os.ErrNotExist || !f.IsDir() {
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return common.Response{
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Code: 500,
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Message: "repo is not using git",
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}
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}
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go func() {
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// go get
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// -u: update all dependencies (including API source)
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// -d: stop after downloading deps
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if !execCommand("go", "get", "-u", "-d") {
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return
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}
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if !execCommand("go", "build") {
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return
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}
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proc, err := os.FindProcess(syscall.Getpid())
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if err != nil {
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log.Println(err)
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return
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}
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proc.Signal(syscall.SIGUSR2)
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}()
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return common.Response{
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Code: 200,
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Message: "Started updating! " + surpriseMe(),
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}
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}
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func execCommand(command string, args ...string) bool {
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cmd := exec.Command(command, args...)
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cmd.Env = os.Environ()
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stdout, err := cmd.StdoutPipe()
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if err != nil {
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log.Println(err)
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return false
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}
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stderr, err := cmd.StderrPipe()
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if err != nil {
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log.Println(err)
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return false
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}
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if err := cmd.Start(); err != nil {
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log.Println(err)
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return false
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}
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data, err := ioutil.ReadAll(stderr)
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if err != nil {
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log.Println(err)
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return false
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}
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// Bob. We got a problem.
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if len(data) != 0 {
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log.Println(string(data))
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return false
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}
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io.Copy(os.Stdout, stdout)
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cmd.Wait()
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stdout.Close()
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return true
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}
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