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upload.go
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upload.go
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package main
import "bytes"
import "crypto/md5"
import "encoding/json"
import "flag"
import "fmt"
import "html/template"
import "log"
import "net/http"
import "os"
import "os/exec"
import "path"
import "strconv"
import "sync"
import "time"
import "encoding/base64"
import "math/rand"
import "errors"
import "encoding/gob"
import "io"
import "github.com/mkb218/egonest/src/echonest"
func mapKey(in interface{}, k string) interface{} {
if m, ok := in.(map[string]interface{}); ok {
if v, ok := m[k]; ok {
return v
}
}
return nil
}
var tmpLock sync.Mutex
var tmpnamesize = base64.URLEncoding.EncodedLen(8)
func mktemp(prefix string) (*os.File, error) {
tmpLock.Lock()
defer tmpLock.Unlock()
for {
namen := rand.Int63()
var b []byte
for i := 0; i < 8; i++ {
b = append(b, byte(namen>>uint(i*8) & 0xff))
}
c := make([]byte, tmpnamesize)
base64.URLEncoding.Encode(c, b)
p := path.Join(os.TempDir(), string(c))
if f, err := os.OpenFile(p, os.O_CREATE|os.O_EXCL|os.O_RDWR, 0666); err == nil {
return f, nil
} else {
log.Println("couldn't create tmp file", namen, "reason",err)
if !os.IsExist(err) {
return nil, err
}
}
}
panic("unreachable")
}
type SegmentID struct {
Id string
Index int
}
var allSegsLock sync.RWMutex
var allSegs struct {
Segs map[SegmentID]Segment
// timbre [12]bucket
// Pitch [12]Bucket
}
func initAllSegs() {
allSegsLock.Lock()
defer allSegsLock.Unlock()
r, err := os.Open(path.Join(MapGobPath, "allsegs"))
if err != nil {
log.Println("error opening map gob file", err)
allSegs.Segs = make(map[SegmentID]Segment)
return
}
defer r.Close()
g := gob.NewDecoder(r)
err = g.Decode(&allSegs)
if err != nil {
log.Println("error decoding allSegs", err)
}
for k, v := range allSegs.Segs {
fi, err := os.Stat(v.File)
if err != nil || fi.IsDir() {
delete(allSegs.Segs, k)
}
}
log.Println("decoded", len(allSegs.Segs), "segments")
}
func AddToAllSegs(in []Segment) {
allSegsLock.Lock()
defer allSegsLock.Unlock()
for _, r := range in {
allSegs.Segs[r.SegmentID] = r
for i := 0; i < 12; i++ {
// bucketnum := int(r.Timbre[i] / allSegs.timbre[i].width)
// allSegs.timbre[i].Segments[bucketnum] = append(allSegs.timbre[i].Segments[bucketnum], r.SegmentID)
// bucketnum := int(r.Pitches[i] / allSegs.Pitch[i].Width)
// allSegs.Pitch[i].Segments[bucketnum] = append(allSegs.Pitch[i].Segments[bucketnum], r.SegmentID)
}
}
// balanceAllBuckets()
// dump to gobfile
w, err := os.Create(path.Join(MapGobPath, "allsegs"))
if err != nil {
log.Println("error creating gobfile for allsegs", err)
return
}
defer w.Close()
g := gob.NewEncoder(w)
err = g.Encode(&allSegs)
if err != nil {
log.Println("error writing gobfile for allsegs", err)
}
}
type UploadRequest struct {
Data []byte
Filetype string
Add bool
Playback bool
Fma_url string
}
func minOf(i, j int64) int64 {
if i < j {
return i
}
return j
}
func fminOf(i, j float64) float64 {
if i < j {
return i
}
return j
}
func fmaxOf(i, j float64) float64 {
if i > j {
return i
}
return j
}
var UploadChan chan UploadRequest
var MapGobPath string
var samplepath string
var echonestkey string
type md5toid struct {
Ids map[md5sum]string
}
type md5sum [16]byte
var Md5toidLock sync.Mutex
var Md5toid md5toid = md5toid{Ids:make(map[md5sum]string)}
func InitIDForChecksum() {
Md5toidLock.Lock()
defer Md5toidLock.Unlock()
r, err := os.Open(path.Join(MapGobPath, "md5map"))
if err != nil {
log.Println("error opening map gob file", err)
return
}
defer r.Close()
g := gob.NewDecoder(r)
g.Decode(&Md5toid)
log.Println("decoded", len(Md5toid.Ids), "md5s")
}
func GetIDForChecksum(m md5sum) (val string, ok bool) {
Md5toidLock.Lock()
defer Md5toidLock.Unlock()
val, ok = Md5toid.Ids[m]
return
}
func AddIDForChecksum(m md5sum, id string) {
Md5toidLock.Lock()
defer Md5toidLock.Unlock()
Md5toid.Ids[m] = id
// dump to gobfile
w, err := os.Create(path.Join(MapGobPath, "md5map"))
if err != nil {
log.Println("error creating gobfile for map", err)
return
}
defer w.Close()
g := gob.NewEncoder(w)
err = g.Encode(&Md5toid)
if err != nil {
log.Println("error writing gobfile for md5toid", err)
}
}
type Segment struct {
SegmentID
Start float64
Duration float64
LoudnessStart float64
LoudnessMax float64
Confidence float64
BeatDistance float64
Pitches [12]float64
Timbre [12]float64
File string
RootLoudnessMax float64
RootLoudnessStart float64
RootDuration float64
Distance float64
}
type Analysis struct {
Artist, Title string
Segments []Segment
Last time.Time
}
type ID2AnalysisResults struct {
Ids map[string]Analysis
}
var id2analysisLock sync.Mutex
var id2analysis = ID2AnalysisResults{Ids:make(map[string]Analysis)}
func InitSegmentsForChecksum() {
id2analysisLock.Lock()
defer id2analysisLock.Unlock()
r, err := os.Open(path.Join(MapGobPath, "idamap"))
if err != nil {
log.Println("error opening idamap gob file", err)
return
}
defer r.Close()
g := gob.NewDecoder(r)
g.Decode(&id2analysis)
log.Println("decoded", len(id2analysis.Ids), "ids")
}
func GetSegmentsForID(id string) (s Analysis, ok bool) {
id2analysisLock.Lock()
defer id2analysisLock.Unlock()
s, ok = id2analysis.Ids[id]
if (s.Last.UnixNano() > 0) && (time.Now().Sub(s.Last) > (30 * 24 * time.Hour)) {
log.Println("expired")
delete(id2analysis.Ids,id)
return Analysis{}, false
}
return
}
func SetSegmentsForID(id string, segments Analysis) {
id2analysisLock.Lock()
defer id2analysisLock.Unlock()
id2analysis.Ids[id] = segments
// write to gob
w, err := os.Create(path.Join(MapGobPath, "idamap"))
if err != nil {
log.Println("error creating gobfile for idamap", err)
return
}
defer w.Close()
g := gob.NewEncoder(w)
err = g.Encode(&id2analysis)
if err != nil {
log.Println("error writing gobfile for idamap", err)
}
}
func DetailsForID(url, id string) (a Analysis, err error) {
// log.Println("DetailsForID", id, url)
response, err := http.Get(url)
if err != nil {
log.Println("couldn't get details for", id)
return Analysis{}, err
}
// log.Println("got", response.ContentLength, "bytes")
var details interface{}
j := json.NewDecoder(response.Body)
j.Decode(&details)
response.Body.Close()
artist := mapKey(mapKey(details, "meta"), "artist")
title := mapKey(mapKey(details, "meta"), "title")
switch t := artist.(type) {
case string:
a.Artist = t
log.Println("artist", artist)
// default:
// log.Println("no artist available")
}
switch t := title.(type) {
case string:
a.Title = t
log.Println("title", title)
default:
// log.Println("no title available")
}
jsegments, ok := mapKey(details, "segments").([]interface{})
if !ok {
log.Println("no segments available for", id)
return Analysis{}, err
}
jbeats, ok := mapKey(details, "beats").([]interface{})
if !ok {
log.Println("no beats available for", id)
return Analysis{}, err
}
jb0, ok := jbeats[0].(map[string]interface{})
jb1, ok := jbeats[1].(map[string]interface{})
jbeats = jbeats[2:]
b0, ok := jb0["start"].(float64)
if !ok {
log.Println("no beat start time")
b0 = 0
}
b1, ok := jb1["start"].(float64)
if !ok {
log.Println("no beat start time")
b1 = 0
}
a.Segments = make([]Segment, len(jsegments))
SEG: for index, is := range jsegments {
s := is.(map[string]interface{})
a.Segments[index].Id = id
a.Segments[index].Index = index
a.Segments[index].Start = s["start"].(float64)
a.Segments[index].Duration = s["duration"].(float64)
a.Segments[index].LoudnessStart = s["loudness_start"].(float64)
a.Segments[index].LoudnessMax = s["loudness_max"].(float64)
a.Segments[index].Confidence = s["confidence"].(float64)
if a.Segments[index].Start > b1 {
b0 = b1
if len(jbeats) > 0 {
jb := jbeats[0]
jbeats = jbeats[1:]
b1, ok = mapKey(jb,"start").(float64)
if !ok {
b1 = 0
}
}
}
a.Segments[index].BeatDistance = a.Segments[index].Start - b0
p, ok := s["pitches"].([]interface{})
if !ok {
log.Println("no pitch info")
continue
}
t, ok := s["timbre"].([]interface{})
if !ok {
log.Println("no timbre info")
continue
}
for i := 0; i < 12; i++ {
a.Segments[index].Pitches[i], ok = p[i].(float64)
if !ok {
log.Println("can't coerce p element to float64")
continue SEG
}
a.Segments[index].Timbre[i], ok = t[i].(float64)
if !ok {
log.Println("can't coerce t element to float64")
continue SEG
}
}
}
// log.Println("details OK")
a.Last = time.Now()
return a, nil
}
func UploadProc() {
log.Println("starting upload proc")
// read md5 to ID mapping
// read ID to analysis mapping
hasher := md5.New()
e := echonest.New()
if echonestkey != "" {
e.Key = echonestkey
}
for r := range UploadChan {
log.Println("got", len(r.Data), "bytes",r.Filetype,"add",r.Add, "playback", r.Playback)
// md5 data and see if we have analysis already
var m md5sum
hasher.Write(r.Data)
copy(m[:], hasher.Sum(nil))
hasher.Reset()
var id string
var ok bool
var a Analysis
var url string
var err error
if id, ok = GetIDForChecksum(m); !ok {
// log.Println("no id for md5", m)
// if not upload it to analyzer.
id, url, err = e.Upload(r.Filetype, r.Data)
if err != nil {
log.Println("error uploading track to EN", err)
continue
}
// log.Println("got ID", id, "url", url, "err", err)
// update md5 to id mapping
AddIDForChecksum(m, id)
}
// if it comes back with an ID that we have, then great!
// if not then fetch the detailed analysis
// update id to analysis mapping
if a, ok = GetSegmentsForID(id); !ok {
a, err = DetailsForID(url, id)
if err != nil {
log.Println("error getting details from EN", err)
continue
}
SetSegmentsForID(id, a)
}
go func() {
// if it's marked "add" open data with sox sub process (for mp3, mp4, and m4a support) to get raw samples
has := (a.Segments[0].File != "")
if r.Add && !has {
buf, err := openBuf(r.Data, r.Filetype)
if err != nil {
log.Println("couldn't get sox to run", err)
return
}
// put raw samples into files
for i := range a.Segments {
filename := id + "_" + strconv.Itoa(a.Segments[i].Index)
filename = path.Join(samplepath, filename)
file, err := os.Create(filename)
if err != nil {
log.Println("couldn't open file", filename, err)
continue
}
bytecount := int(a.Segments[i].Duration * float64(samplerate)) * 4 // 2 bytes per sample * 2 channels per frame
// log.Println(a.segments[i].Duration, bytecount)
_, err = file.Write(buf[:bytecount])
if err != nil {
log.Println("error writing sample", err)
}
file.Close()
a.Segments[i].File = filename
}
// add to all segments
// log.Println("adding to all segs")
go func() { attributionChan <- en_tuple{id, playq{a.Artist, a.Title, r.Fma_url} } }()
AddToAllSegs(a.Segments)
// log.Println("done adding to all segs")
}
// if request is marked "playback" add the ID to the request queue
if r.Playback {
RequestQueue <- id
}
}()
}
}
func openBuf(data []byte, filetype string) (obuf []byte, err error) {
p, err := exec.LookPath("sox")
if err != nil {
log.Fatalln("no sox installed!", err)
}
var c *exec.Cmd
var reader io.Reader
switch filetype {
case "mp3": fallthrough
case "wav": fallthrough
case "ogg": fallthrough
case "au":
reader = bytes.NewReader(data)
case "mp4": fallthrough
case "m4a":
// else write to tmpfile, then invoke sox, defer deletion of tmpfile. weak.
w, err := mktemp(filetype)
if err != nil {
log.Println("couldn't make tmp file", err)
return nil, err
}
defer func() { w.Close(); os.Remove(w.Name()) }()
var n int
n, err = w.Write(data)
if n != len(data) {
log.Println("couldn't write all data to tmp file!")
}
if err != nil {
log.Println("couldn't write to tmp file", w.Name(), err)
return nil, err
}
w.Seek(0, os.SEEK_SET)
reader = w
default:
return nil, errors.New("unrecognized filetype")
}
// use samplerate from args, 16 bits, big endian, two channels
c = exec.Command(p, "-t", filetype, "-", "-b", "16", "-c", "2", "-e", "signed-integer", "-t", "raw", "-r", strconv.Itoa(samplerate), "-B", "-")
c.Stdin = reader
errbuf := new(bytes.Buffer)
c.Stderr = errbuf
obuf, err = c.Output()
if err != nil {
log.Println("error running sox", err, string(errbuf.Bytes()))
return nil, err
}
return
}
var rander *rand.Rand
func init() {
flag.StringVar(&MapGobPath, "mapgobpath", "./gobs", "")
flag.StringVar(&samplepath, "samples", "./samples", "")
flag.StringVar(&echonestkey, "echonestkey", "", "")
UploadChan = make(chan UploadRequest,100)
gofuncs = append(gofuncs, UploadProc)
http.HandleFunc("/upload", UploadHandler)
rander = rand.New(rand.NewSource(time.Now().UnixNano()))
}
func UploadHandler(resp http.ResponseWriter, req *http.Request) {
t, fail := template.ParseFiles(path.Join(templateRoot, "upload_fail.html"))
if fail != nil {
log.Println("couldn't load template " + fail.Error())
}
// log.Println(req.Header)
log.Println("upload")
add := (req.FormValue("add") == "on")
playback := (req.FormValue("playback") == "on")
filetype := req.FormValue("filetype")
fma_url := req.FormValue("fma_url")
log.Println(add, playback, filetype, fma_url)
file, _, err := req.FormFile("filedata")
if !add && !playback {
if fail != nil {
fmt.Fprintf(resp, "Not only are my HTML templates missing, but you didn't tell me to do anything!")
} else {
t.Execute(resp, "If I can't add it to the library, and you don't want to hear it, why'd you bother uploading?")
}
return
}
if len(filetype) == 0 {
if fail != nil {
fmt.Fprintf(resp, "Not only are my HTML templates missing, but you didn't give me a filetype!")
} else {
t.Execute(resp, "I need a filetype!")
}
return
}
if err != nil {
if fail != nil {
fmt.Fprintf(resp, "Not only are my HTML templates missing, but there was an error uploading the file! %v", err)
} else {
t.Execute(resp, "There was an error uploading the file: "+err.Error())
}
return
}
// build the request to go into the channel
r := UploadRequest{make([]byte, req.ContentLength), filetype, add, playback, fma_url}
n, err := file.Read(r.Data)
if err != nil {
if fail != nil {
fmt.Fprintf(resp, "Not only are my HTML templates missing, but there was an error uploading the file! %v", err)
} else {
t.Execute(resp, "There was an error uploading the file: "+err.Error())
}
return
}
if n < len(r.Data) {
r.Data = r.Data[0:n]
}
// why wait?
go func () { UploadChan <- r } ()
t, err = template.ParseFiles(path.Join(templateRoot, "upload_success.html"))
t.Execute(resp, playback)
}