refactor: move around handler

monorepo
Varun Patil 2023-10-21 11:27:25 -07:00
parent 9f50cae0b1
commit 48ed209d59
3 changed files with 286 additions and 264 deletions

View File

@ -1,5 +1,13 @@
package main
import (
"encoding/json"
"io/ioutil"
"log"
"os"
"os/exec"
)
type Config struct {
// Is this server configured?
Configured bool
@ -48,3 +56,50 @@ type Config struct {
// Use GOP size workaround for streaming (NVENC)
UseGopSize bool `json:"useGopSize"`
}
func (c *Config) FromFile(path string) {
// load json config
content, err := ioutil.ReadFile(path)
if err != nil {
log.Fatal("Error when opening file: ", err)
}
err = json.Unmarshal(content, &c)
if err != nil {
log.Fatal("Error loading config file", err)
}
// Set config as loaded
c.Configured = true
c.Print()
}
func (c *Config) AutoDetect() {
// Auto-detect ffmpeg and ffprobe paths
if c.FFmpeg == "" || c.FFprobe == "" {
ffmpeg, err := exec.LookPath("ffmpeg")
if err != nil {
log.Fatal("Could not find ffmpeg")
}
ffprobe, err := exec.LookPath("ffprobe")
if err != nil {
log.Fatal("Could not find ffprobe")
}
c.FFmpeg = ffmpeg
c.FFprobe = ffprobe
}
// Auto-choose tempdir
if c.TempDir == "" {
c.TempDir = os.TempDir() + "/go-vod"
}
// Print updated config
c.Print()
}
func (c *Config) Print() {
log.Printf("%+v\n", c)
}

223
handler.go 100644
View File

@ -0,0 +1,223 @@
package main
import (
"encoding/json"
"io/ioutil"
"log"
"net/http"
"os"
"strings"
"sync"
)
type Handler struct {
c *Config
server *http.Server
managers map[string]*Manager
mutex sync.RWMutex
close chan string
exitCode int
}
func NewHandler(c *Config) *Handler {
h := &Handler{
c: c,
managers: make(map[string]*Manager),
close: make(chan string),
exitCode: 0,
}
// Recreate tempdir
os.RemoveAll(c.TempDir)
os.MkdirAll(c.TempDir, 0755)
return h
}
func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
// Check version if monitoring is enabled
if h.c.VersionMonitor && !h.versionOk(w, r) {
return
}
url := r.URL.Path
parts := make([]string, 0)
// log.Println("Serving", url)
// Break url into parts
for _, part := range strings.Split(url, "/") {
if part != "" {
parts = append(parts, part)
}
}
// Serve actual file from manager
if len(parts) < 3 {
log.Println("Invalid URL", url)
w.WriteHeader(http.StatusBadRequest)
return
}
// Get streamid and chunk
streamid := parts[0]
path := "/" + strings.Join(parts[1:len(parts)-1], "/")
chunk := parts[len(parts)-1]
// Check if POST request to create temp file
if r.Method == "POST" && len(parts) >= 2 && parts[1] == "create" {
var err error
path, err = h.createTempFile(w, r, parts)
if err != nil {
return
}
}
// Check if test request
if chunk == "test" {
w.Header().Set("Content-Type", "application/json")
// check if test file is readable
size := 0
info, err := os.Stat(path)
if err == nil {
size = int(info.Size())
}
json.NewEncoder(w).Encode(map[string]interface{}{
"version": VERSION,
"size": size,
})
return
}
// Check if configuration request
if r.Method == "POST" && chunk == "config" {
w.Header().Set("Content-Type", "application/json")
// read new config
body, err := ioutil.ReadAll(r.Body)
if err != nil {
log.Println("Error reading body", err)
w.WriteHeader(http.StatusInternalServerError)
return
}
// Unmarshal config
if err := json.Unmarshal(body, h.c); err != nil {
log.Println("Error unmarshaling config", err)
w.WriteHeader(http.StatusInternalServerError)
return
}
// Set config as loaded
h.c.Configured = true
// Print loaded config
log.Printf("%+v\n", h.c)
return
}
// Check if configured
if !h.c.Configured {
w.WriteHeader(http.StatusServiceUnavailable)
return
}
// Check if valid
if streamid == "" || path == "" {
w.WriteHeader(http.StatusBadRequest)
return
}
// Get existing manager or create new one
manager := h.getManager(path, streamid)
if manager == nil {
manager = h.createManager(path, streamid)
}
// Failed to create manager
if manager == nil {
w.WriteHeader(http.StatusInternalServerError)
return
}
// Serve chunk if asked for
if chunk != "" && chunk != "ignore" {
manager.ServeHTTP(w, r, chunk)
}
}
func (h *Handler) versionOk(w http.ResponseWriter, r *http.Request) bool {
expected := r.Header.Get("X-Go-Vod-Version")
if len(expected) > 0 && expected != VERSION {
log.Println("Version mismatch", expected, VERSION)
// Try again in some time
w.WriteHeader(http.StatusServiceUnavailable)
// Exit with status code 12
h.exitCode = 12
h.Close()
return false
}
return true
}
func (h *Handler) getManager(path string, streamid string) *Manager {
h.mutex.RLock()
defer h.mutex.RUnlock()
m := h.managers[streamid]
if m == nil || m.path != path {
return nil
}
return m
}
func (h *Handler) createManager(path string, streamid string) *Manager {
manager, err := NewManager(h.c, path, streamid, h.close)
if err != nil {
log.Println("Error creating manager", err)
freeIfTemp(path)
return nil
}
h.mutex.Lock()
defer h.mutex.Unlock()
old := h.managers[streamid]
if old != nil {
old.Destroy()
}
h.managers[streamid] = manager
return manager
}
func (h *Handler) removeManager(streamid string) {
h.mutex.Lock()
defer h.mutex.Unlock()
delete(h.managers, streamid)
}
func (h *Handler) Start() {
go func() {
err := h.server.ListenAndServe()
if err != nil {
log.Fatal("Error starting server", err)
}
}()
for {
id := <-h.close
if id == "" {
return
}
h.removeManager(id)
}
}
func (h *Handler) Close() {
h.close <- ""
}

272
main.go
View File

@ -1,238 +1,13 @@
package main
import (
"encoding/json"
"fmt"
"io/ioutil"
"log"
"net/http"
"os"
"os/exec"
"strings"
"sync"
)
const (
VERSION = "0.1.19"
)
type Handler struct {
c *Config
managers map[string]*Manager
mutex sync.RWMutex
close chan string
server *http.Server
exitCode int
}
func NewHandler(c *Config) *Handler {
h := &Handler{
c: c,
managers: make(map[string]*Manager),
close: make(chan string),
exitCode: 0,
}
// Recreate tempdir
os.RemoveAll(c.TempDir)
os.MkdirAll(c.TempDir, 0755)
return h
}
func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
url := r.URL.Path
parts := make([]string, 0)
// log.Println("Serving", url)
// Check version if monitoring is enabled
if h.c.VersionMonitor {
expected := r.Header.Get("X-Go-Vod-Version")
if len(expected) > 0 && expected != VERSION {
log.Println("Version mismatch", expected, VERSION)
// Try again in some time
w.WriteHeader(http.StatusServiceUnavailable)
// Exit with status code 65
h.exitCode = 12
h.Close()
return
}
}
// Break url into parts
for _, part := range strings.Split(url, "/") {
if part != "" {
parts = append(parts, part)
}
}
// Serve actual file from manager
if len(parts) < 3 {
log.Println("Invalid URL", url)
w.WriteHeader(http.StatusBadRequest)
return
}
// Get streamid and chunk
streamid := parts[0]
path := "/" + strings.Join(parts[1:len(parts)-1], "/")
chunk := parts[len(parts)-1]
// Check if POST request to create temp file
if r.Method == "POST" && len(parts) >= 2 && parts[1] == "create" {
var err error
path, err = h.createTempFile(w, r, parts)
if err != nil {
return
}
}
// Check if test request
if chunk == "test" {
w.Header().Set("Content-Type", "application/json")
// check if test file is readable
size := 0
info, err := os.Stat(path)
if err == nil {
size = int(info.Size())
}
json.NewEncoder(w).Encode(map[string]interface{}{
"version": VERSION,
"size": size,
})
return
}
// Check if configuration request
if r.Method == "POST" && chunk == "config" {
w.Header().Set("Content-Type", "application/json")
// read new config
body, err := ioutil.ReadAll(r.Body)
if err != nil {
log.Println("Error reading body", err)
w.WriteHeader(http.StatusInternalServerError)
return
}
// Unmarshal config
if err := json.Unmarshal(body, h.c); err != nil {
log.Println("Error unmarshaling config", err)
w.WriteHeader(http.StatusInternalServerError)
return
}
// Set config as loaded
h.c.Configured = true
// Print loaded config
log.Printf("%+v\n", h.c)
return
}
// Check if configured
if !h.c.Configured {
w.WriteHeader(http.StatusServiceUnavailable)
return
}
// Check if valid
if streamid == "" || path == "" {
w.WriteHeader(http.StatusBadRequest)
return
}
// Get existing manager or create new one
manager := h.getManager(path, streamid)
if manager == nil {
manager = h.createManager(path, streamid)
}
// Failed to create manager
if manager == nil {
w.WriteHeader(http.StatusInternalServerError)
return
}
// Serve chunk if asked for
if chunk != "" && chunk != "ignore" {
manager.ServeHTTP(w, r, chunk)
}
}
func (h *Handler) getManager(path string, streamid string) *Manager {
h.mutex.RLock()
defer h.mutex.RUnlock()
m := h.managers[streamid]
if m == nil || m.path != path {
return nil
}
return m
}
func (h *Handler) createManager(path string, streamid string) *Manager {
manager, err := NewManager(h.c, path, streamid, h.close)
if err != nil {
log.Println("Error creating manager", err)
freeIfTemp(path)
return nil
}
h.mutex.Lock()
defer h.mutex.Unlock()
old := h.managers[streamid]
if old != nil {
old.Destroy()
}
h.managers[streamid] = manager
return manager
}
func (h *Handler) removeManager(streamid string) {
h.mutex.Lock()
defer h.mutex.Unlock()
delete(h.managers, streamid)
}
func (h *Handler) watchClose() {
for {
id := <-h.close
if id == "" {
return
}
h.removeManager(id)
}
}
func (h *Handler) Close() {
h.close <- ""
}
func loadConfig(path string, c *Config) {
// load json config
content, err := ioutil.ReadFile(path)
if err != nil {
log.Fatal("Error when opening file: ", err)
}
err = json.Unmarshal(content, &c)
if err != nil {
log.Fatal("Error loading config file", err)
}
// Set config as loaded
c.Configured = true
// Print loaded config
log.Printf("%+v\n", c)
}
const VERSION = "0.1.19"
func main() {
// Build initial configuration
@ -255,51 +30,20 @@ func main() {
fmt.Print("go-vod " + VERSION)
return
} else {
// Config file
loadConfig(arg, c)
c.FromFile(arg) // config file
}
}
// Auto-detect ffmpeg and ffprobe paths
if c.FFmpeg == "" || c.FFprobe == "" {
ffmpeg, err := exec.LookPath("ffmpeg")
if err != nil {
log.Fatal("Could not find ffmpeg")
}
// Auto detect ffmpeg and ffprobe
c.AutoDetect()
ffprobe, err := exec.LookPath("ffprobe")
if err != nil {
log.Fatal("Could not find ffprobe")
}
c.FFmpeg = ffmpeg
c.FFprobe = ffprobe
}
// Auto-choose tempdir
if c.TempDir == "" {
c.TempDir = os.TempDir() + "/go-vod"
}
// Print config
log.Printf("%+v\n", c)
// Start server
// Build HTTP server
log.Println("Starting go-vod " + VERSION + " on " + c.Bind)
handler := NewHandler(c)
server := &http.Server{Addr: c.Bind, Handler: handler}
handler.server = server
handler.server = &http.Server{Addr: c.Bind, Handler: handler}
// Start listening on different thread
go func() {
err := server.ListenAndServe()
if err != nil {
log.Fatal("Error starting server", err)
}
}()
// Wait for handler exit
handler.watchClose()
// Start server and wait for handler exit
handler.Start()
log.Println("Exiting VOD server")
// Exit with status code