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cleanup: more spreading out of files

This commit is contained in:
Vincent Batts 2013-02-08 23:52:40 -05:00
parent f05e47e0a1
commit c616327fc6
3 changed files with 446 additions and 429 deletions

33
hash.go Normal file
View file

@ -0,0 +1,33 @@
package main
import (
"crypto/md5"
"fmt"
"hash/adler32"
"io"
"time"
)
/* Convinience method for getting md5 sum of a string */
func GetMd5FromString(blob string) (sum []byte) {
h := md5.New()
defer h.Reset()
io.WriteString(h,blob)
return h.Sum(nil)
}
/* Convinience method for getting md5 sum of some bytes */
func GetMd5FromBytes(blob []byte) (sum []byte) {
h := md5.New()
defer h.Reset()
h.Write(blob)
return h.Sum(nil)
}
/* get a small, decently unique hash */
func GetSmallHash() (small_hash string) {
h := adler32.New()
io.WriteString(h, fmt.Sprintf("%d", time.Now().Unix()))
return fmt.Sprintf("%X", h.Sum(nil))
}

429
imgsrv.go
View file

@ -8,21 +8,13 @@ package main
*/ */
import ( import (
"crypto/md5"
"flag" "flag"
"fmt" "fmt"
"hash/adler32"
"io"
"labix.org/v2/mgo" "labix.org/v2/mgo"
"labix.org/v2/mgo/bson"
"log" "log"
"math/rand"
"mime"
"net/http"
"net/url" "net/url"
"os" "os"
"path/filepath" "path/filepath"
"strings"
"time" "time"
) )
@ -72,427 +64,6 @@ type File struct {
ContentType string "contentType,omitempty" ContentType string "contentType,omitempty"
} }
/* return a <a href/> for a given filename
and root is the relavtive base of the explicit link.
*/
func linkToFile(root string, filename string) (html string) {
return fmt.Sprintf("<a href='%s/f/%s'>%s</a>",
root,
filename,
filename)
}
/* return the sections of the URI Path.
This will disregard the leading '/'
*/
func chunkURI(uri string) (chunks []string) {
var str string
if (uri[0] == '/') {
str = uri[1:]
} else {
str = uri
}
return strings.Split(str, "/")
}
/* given an url.URL.RawQuery, get a dictionary in return */
func parseRawQuery(qry string) (params map[string]string) {
qryChunks := strings.Split(qry, "&")
params = make(map[string]string, len(qryChunks))
for _, chunk := range qryChunks {
p := strings.SplitN(chunk, "=", 2)
if (len(p) == 2) {
params[p[0]] = p[1]
}
}
return params
}
/* kindof a common log type output */
func LogRequest(r *http.Request, statusCode int) {
var addr string
var user_agent string
user_agent = ""
addr = r.RemoteAddr
for k, v := range r.Header {
if k == "User-Agent" {
user_agent = strings.Join(v, " ")
}
if k == "X-Forwarded-For" {
addr = strings.Join(v," ")
}
}
fmt.Printf("%s - - [%s] \"%s %s\" \"%s\" %d %d\n",
addr,
time.Now(),
r.Method,
r.URL.Path,
user_agent,
statusCode,
r.ContentLength )
}
/* Convinience method for getting md5 sum of a string */
func getMd5FromString(blob string) (sum []byte) {
h := md5.New()
defer h.Reset()
io.WriteString(h,blob)
return h.Sum(nil)
}
/* Convinience method for getting md5 sum of some bytes */
func getMd5FromBytes(blob []byte) (sum []byte) {
h := md5.New()
defer h.Reset()
h.Write(blob)
return h.Sum(nil)
}
/* get a small, decently unique hash */
func getSmallHash() (small_hash string) {
h := adler32.New()
io.WriteString(h, fmt.Sprintf("%d", time.Now().Unix()))
return fmt.Sprintf("%X", h.Sum(nil))
}
func serverErr(w http.ResponseWriter, r *http.Request, e error) {
log.Printf("Error: %s", e)
LogRequest(r,503)
fmt.Fprintf(w,"Error: %s", e)
http.Error(w, "Service Unavailable", 503)
return
}
/*
GET /f/
GET /f/:name
*/
// Show a page of most recent images, and tags, and uploaders ...
func routeFilesGET(w http.ResponseWriter, r *http.Request) {
uriChunks := chunkURI(r.URL.Path)
if ( len(uriChunks) > 2 ) {
LogRequest(r,404)
http.NotFound(w,r)
return
}
if (len(uriChunks) == 2 && len(uriChunks[1]) > 0) {
log.Printf("Searching for [%s] ...", uriChunks[1])
query := gfs.Find(bson.M{"filename": uriChunks[1] })
c, err := query.Count()
// preliminary checks, if they've passed an image name
if (err != nil) {
serverErr(w,r,err)
return
}
log.Printf("Results for [%s] = %d", uriChunks[1], c)
if (c == 0) {
LogRequest(r,404)
http.NotFound(w,r)
return
}
ext := filepath.Ext(uriChunks[1])
w.Header().Set("Content-Type", mime.TypeByExtension(ext))
w.Header().Set("Cache-Control", "max-age=315360000")
w.WriteHeader(http.StatusOK)
file, err := gfs.Open(uriChunks[1])
if (err != nil) {
serverErr(w,r,err)
return
}
io.Copy(w,file) // send the contents of the file in the body
} else {
// TODO show a list of recent uploads? ...
}
LogRequest(r,200)
}
/*
POST /f/[:name][?k=v&k=v]
*/
// Create the file by the name in the path and/or parameter?
// add keywords from the parameters
// look for an image in the r.Body
func routeFilesPOST(w http.ResponseWriter, r *http.Request) {
uriChunks := chunkURI(r.URL.Path)
if (len(uriChunks) > 2 &&
((len(uriChunks) == 2 && len(uriChunks[1]) == 0) &&
len(r.URL.RawQuery) == 0 )) {
LogRequest(r,403)
http.Error(w, "Not Acceptable", 403)
return
}
var filename string
info := Info{
Ip: r.RemoteAddr,
Random: rand.Int63(),
}
if (len(uriChunks) == 2 && len(uriChunks[1]) != 0) {
filename = uriChunks[1]
}
params := parseRawQuery(r.URL.RawQuery)
var p_ext string
for k,v := range params {
switch {
case (k == "filename"):
filename = v
case (k == "ext"):
if (v[0] != '.') {
p_ext = fmt.Sprintf(".%s", v)
} else {
p_ext = v
}
case (k == "k" || k == "key" || k == "keyword"):
info.Keywords = append(info.Keywords[:], v)
case (k == "keys" || k == "keywords"):
for _, key := range strings.Split(v, ",") {
info.Keywords = append(info.Keywords[:], key)
}
}
}
if (len(filename) == 0) {
str := getSmallHash()
if (len(p_ext) == 0) {
filename = fmt.Sprintf("%s.jpg", str)
} else {
filename = fmt.Sprintf("%s%s", str, p_ext)
}
}
exists, err := HasFileByFilename(filename)
if (err == nil && !exists) {
file, err := gfs.Create(filename)
if (err != nil) {
serverErr(w,r,err)
return
}
n, err := io.Copy(file, r.Body)
if (err != nil) {
serverErr(w,r,err)
return
}
if (n != r.ContentLength) {
log.Printf("WARNING: [%s] content-length (%d), content written (%d)",
filename,
r.ContentLength,
n)
}
file.Close()
} else if (exists) {
log.Printf("[%s] already exists", filename)
} else {
serverErr(w,r,err)
return
}
io.WriteString(w,
fmt.Sprintf("%s%s/f/%s\n", r.URL.Scheme, r.URL.Host, filename))
LogRequest(r,200)
}
func routeFilesPUT(w http.ResponseWriter, r *http.Request) {
// update the file by the name in the path and/or parameter?
// update/add keywords from the parameters
// look for an image in the r.Body
LogRequest(r,200)
}
func routeFilesDELETE(w http.ResponseWriter, r *http.Request) {
uriChunks := chunkURI(r.URL.Path)
if ( len(uriChunks) > 2 ) {
LogRequest(r,404)
http.NotFound(w,r)
return
} else if (len(uriChunks) == 2 && len(uriChunks[1]) == 0) {
}
exists, err := HasFileByFilename(uriChunks[1])
if (err != nil) {
serverErr(w,r,err)
return
}
if (exists) {
err = gfs.Remove(uriChunks[1])
if (err != nil) {
serverErr(w,r,err)
return
}
LogRequest(r,200)
} else {
LogRequest(r,404)
http.NotFound(w,r)
}
// delete the name in the path and/or parameter?
}
func routeFiles(w http.ResponseWriter, r *http.Request) {
switch {
case r.Method == "GET":
routeFilesGET(w,r)
case r.Method == "PUT":
routeFilesPUT(w,r)
case r.Method == "POST":
routeFilesPOST(w,r)
case r.Method == "DELETE":
routeFilesDELETE(w,r)
default:
LogRequest(r,404)
http.NotFound(w,r)
return
}
}
func routeRoot(w http.ResponseWriter, r *http.Request) {
if (r.Method != "GET") {
LogRequest(r,404)
http.NotFound(w,r)
return
}
// Show a page of most recent images, and tags, and uploaders ...
w.Header().Set("Content-Type", "text/html")
//iter := gfs.Find(bson.M{"uploadDate": bson.M{"$gt": time.Now().Add(-time.Hour)}}).Limit(10).Iter()
iter := gfs.Find(nil).Sort("-uploadDate").Limit(10).Iter()
writeList(w, iter)
LogRequest(r,200)
}
func routeAll(w http.ResponseWriter, r *http.Request) {
if (r.Method != "GET") {
LogRequest(r,404)
http.NotFound(w,r)
return
}
w.Header().Set("Content-Type", "text/html")
// Show a page of all the images
iter := gfs.Find(nil).Iter()
writeList(w, iter)
LogRequest(r,200)
}
/*
GET /k/
GET /k/:name
GET /k/:name/r
Show a page of all the keyword tags, and then the images
If /k/:name/r then show a random image by keyword name
Otherwise 404
*/
func routeKeywords(w http.ResponseWriter, r *http.Request) {
uriChunks := chunkURI(r.URL.Path)
if (r.Method != "GET" ||
len(uriChunks) > 3 ||
(len(uriChunks) == 3 && uriChunks[2] != "r")) {
LogRequest(r,404)
http.NotFound(w,r)
return
}
log.Printf("K: %s (%d)", uriChunks, len(uriChunks))
params := parseRawQuery(r.URL.RawQuery)
log.Printf("K: params: %s", params)
var iter *mgo.Iter
if (len(uriChunks) == 1) {
// show a sorted list of tag name links
iter = gfs.Find(bson.M{"metadata": bson.M{"keywords": uriChunks[1] } }).Sort("$natural").Limit(100).Iter()
} else if (len(uriChunks) == 2) {
iter = gfs.Find(bson.M{"metadata": bson.M{"keywords": uriChunks[1] } }).Limit(10).Iter()
} else if (uriChunks[2] == "r") {
// TODO determine how to show a random image by keyword ...
log.Println("random isn't built yet")
LogRequest(r,404)
return
}
writeList(w, iter)
LogRequest(r,200)
}
func writeList(w http.ResponseWriter, iter *mgo.Iter) {
var this_file File
fmt.Fprintf(w, "<ul>\n")
for iter.Next(&this_file) {
log.Println(this_file.Filename)
fmt.Fprintf(w, "<li>%s - %d</li>\n",
linkToFile("", this_file.Filename),
this_file.UploadDate.Year())
}
fmt.Fprintf(w, "</ul>\n")
}
// Show a page of all the uploader's IPs, and the images
func routeExt(w http.ResponseWriter, r *http.Request) {
if (r.Method != "GET") {
LogRequest(r,404)
http.NotFound(w,r)
return
}
LogRequest(r,200)
}
// Show a page of all the uploader's IPs, and the images
func routeIPs(w http.ResponseWriter, r *http.Request) {
if (r.Method != "GET") {
LogRequest(r,404)
http.NotFound(w,r)
return
}
LogRequest(r,200)
}
func initMongo() {
mongo_session, err := mgo.Dial(MongoHost)
if err != nil {
log.Panic(err)
}
images_db = mongo_session.DB(MongoDB)
if (len(MongoUsername) > 0 && len(MongoPassword) > 0) {
err = images_db.Login(MongoUsername, MongoPassword)
if (err != nil) {
log.Panic(err)
}
}
gfs = images_db.GridFS("fs")
}
/* Run as the image server */
func runServer(ip, port string) {
var addr = fmt.Sprintf("%s:%s", ip, port)
initMongo()
defer mongo_session.Close()
http.HandleFunc("/", routeRoot)
http.HandleFunc("/all", routeAll)
http.HandleFunc("/f/", routeFiles)
http.HandleFunc("/k/", routeKeywords)
http.HandleFunc("/ip/", routeIPs)
http.HandleFunc("/ext/", routeExt)
//http.HandleFunc("/md5/", routeMD5s)
log.Printf("Serving on %s ...", addr)
log.Fatal(http.ListenAndServe(addr, nil))
}
/* http://golang.org/doc/effective_go.html#init */ /* http://golang.org/doc/effective_go.html#init */
func init() { func init() {
flag.StringVar(&ConfigFile, flag.StringVar(&ConfigFile,

413
server.go Normal file
View file

@ -0,0 +1,413 @@
package main
import (
"fmt"
"io"
"labix.org/v2/mgo"
"labix.org/v2/mgo/bson"
"log"
"math/rand"
"mime"
"net/http"
"path/filepath"
"strings"
"time"
)
func serverErr(w http.ResponseWriter, r *http.Request, e error) {
log.Printf("Error: %s", e)
LogRequest(r,503)
fmt.Fprintf(w,"Error: %s", e)
http.Error(w, "Service Unavailable", 503)
return
}
/* return a <a href/> for a given filename
and root is the relavtive base of the explicit link.
*/
func linkToFile(root string, filename string) (html string) {
return fmt.Sprintf("<a href='%s/f/%s'>%s</a>",
root,
filename,
filename)
}
/* return the sections of the URI Path.
This will disregard the leading '/'
*/
func chunkURI(uri string) (chunks []string) {
var str string
if (uri[0] == '/') {
str = uri[1:]
} else {
str = uri
}
return strings.Split(str, "/")
}
/* given an url.URL.RawQuery, get a dictionary in return */
func parseRawQuery(qry string) (params map[string]string) {
qryChunks := strings.Split(qry, "&")
params = make(map[string]string, len(qryChunks))
for _, chunk := range qryChunks {
p := strings.SplitN(chunk, "=", 2)
if (len(p) == 2) {
params[p[0]] = p[1]
}
}
return params
}
/* kindof a common log type output */
func LogRequest(r *http.Request, statusCode int) {
var addr string
var user_agent string
user_agent = ""
addr = r.RemoteAddr
for k, v := range r.Header {
if k == "User-Agent" {
user_agent = strings.Join(v, " ")
}
if k == "X-Forwarded-For" {
addr = strings.Join(v," ")
}
}
fmt.Printf("%s - - [%s] \"%s %s\" \"%s\" %d %d\n",
addr,
time.Now(),
r.Method,
r.URL.Path,
user_agent,
statusCode,
r.ContentLength )
}
/*
GET /f/
GET /f/:name
*/
// Show a page of most recent images, and tags, and uploaders ...
func routeFilesGET(w http.ResponseWriter, r *http.Request) {
uriChunks := chunkURI(r.URL.Path)
if ( len(uriChunks) > 2 ) {
LogRequest(r,404)
http.NotFound(w,r)
return
}
if (len(uriChunks) == 2 && len(uriChunks[1]) > 0) {
log.Printf("Searching for [%s] ...", uriChunks[1])
query := gfs.Find(bson.M{"filename": uriChunks[1] })
c, err := query.Count()
// preliminary checks, if they've passed an image name
if (err != nil) {
serverErr(w,r,err)
return
}
log.Printf("Results for [%s] = %d", uriChunks[1], c)
if (c == 0) {
LogRequest(r,404)
http.NotFound(w,r)
return
}
ext := filepath.Ext(uriChunks[1])
w.Header().Set("Content-Type", mime.TypeByExtension(ext))
w.Header().Set("Cache-Control", "max-age=315360000")
w.WriteHeader(http.StatusOK)
file, err := gfs.Open(uriChunks[1])
if (err != nil) {
serverErr(w,r,err)
return
}
io.Copy(w,file) // send the contents of the file in the body
} else {
// TODO show a list of recent uploads? ...
}
LogRequest(r,200)
}
/*
POST /f/[:name][?k=v&k=v]
*/
// Create the file by the name in the path and/or parameter?
// add keywords from the parameters
// look for an image in the r.Body
func routeFilesPOST(w http.ResponseWriter, r *http.Request) {
uriChunks := chunkURI(r.URL.Path)
if (len(uriChunks) > 2 &&
((len(uriChunks) == 2 && len(uriChunks[1]) == 0) &&
len(r.URL.RawQuery) == 0 )) {
LogRequest(r,403)
http.Error(w, "Not Acceptable", 403)
return
}
var filename string
info := Info{
Ip: r.RemoteAddr,
Random: rand.Int63(),
}
if (len(uriChunks) == 2 && len(uriChunks[1]) != 0) {
filename = uriChunks[1]
}
params := parseRawQuery(r.URL.RawQuery)
var p_ext string
for k,v := range params {
switch {
case (k == "filename"):
filename = v
case (k == "ext"):
if (v[0] != '.') {
p_ext = fmt.Sprintf(".%s", v)
} else {
p_ext = v
}
case (k == "k" || k == "key" || k == "keyword"):
info.Keywords = append(info.Keywords[:], v)
case (k == "keys" || k == "keywords"):
for _, key := range strings.Split(v, ",") {
info.Keywords = append(info.Keywords[:], key)
}
}
}
if (len(filename) == 0) {
str := GetSmallHash()
if (len(p_ext) == 0) {
filename = fmt.Sprintf("%s.jpg", str)
} else {
filename = fmt.Sprintf("%s%s", str, p_ext)
}
}
exists, err := HasFileByFilename(filename)
if (err == nil && !exists) {
file, err := gfs.Create(filename)
if (err != nil) {
serverErr(w,r,err)
return
}
n, err := io.Copy(file, r.Body)
if (err != nil) {
serverErr(w,r,err)
return
}
if (n != r.ContentLength) {
log.Printf("WARNING: [%s] content-length (%d), content written (%d)",
filename,
r.ContentLength,
n)
}
file.Close()
} else if (exists) {
log.Printf("[%s] already exists", filename)
} else {
serverErr(w,r,err)
return
}
io.WriteString(w,
fmt.Sprintf("%s%s/f/%s\n", r.URL.Scheme, r.URL.Host, filename))
LogRequest(r,200)
}
func routeFilesPUT(w http.ResponseWriter, r *http.Request) {
// update the file by the name in the path and/or parameter?
// update/add keywords from the parameters
// look for an image in the r.Body
LogRequest(r,200)
}
func routeFilesDELETE(w http.ResponseWriter, r *http.Request) {
uriChunks := chunkURI(r.URL.Path)
if ( len(uriChunks) > 2 ) {
LogRequest(r,404)
http.NotFound(w,r)
return
} else if (len(uriChunks) == 2 && len(uriChunks[1]) == 0) {
}
exists, err := HasFileByFilename(uriChunks[1])
if (err != nil) {
serverErr(w,r,err)
return
}
if (exists) {
err = gfs.Remove(uriChunks[1])
if (err != nil) {
serverErr(w,r,err)
return
}
LogRequest(r,200)
} else {
LogRequest(r,404)
http.NotFound(w,r)
}
// delete the name in the path and/or parameter?
}
func routeFiles(w http.ResponseWriter, r *http.Request) {
switch {
case r.Method == "GET":
routeFilesGET(w,r)
case r.Method == "PUT":
routeFilesPUT(w,r)
case r.Method == "POST":
routeFilesPOST(w,r)
case r.Method == "DELETE":
routeFilesDELETE(w,r)
default:
LogRequest(r,404)
http.NotFound(w,r)
return
}
}
func routeRoot(w http.ResponseWriter, r *http.Request) {
if (r.Method != "GET") {
LogRequest(r,404)
http.NotFound(w,r)
return
}
// Show a page of most recent images, and tags, and uploaders ...
w.Header().Set("Content-Type", "text/html")
//iter := gfs.Find(bson.M{"uploadDate": bson.M{"$gt": time.Now().Add(-time.Hour)}}).Limit(10).Iter()
iter := gfs.Find(nil).Sort("-uploadDate").Limit(10).Iter()
writeList(w, iter)
LogRequest(r,200)
}
func routeAll(w http.ResponseWriter, r *http.Request) {
if (r.Method != "GET") {
LogRequest(r,404)
http.NotFound(w,r)
return
}
w.Header().Set("Content-Type", "text/html")
// Show a page of all the images
iter := gfs.Find(nil).Iter()
writeList(w, iter)
LogRequest(r,200)
}
/*
GET /k/
GET /k/:name
GET /k/:name/r
Show a page of all the keyword tags, and then the images
If /k/:name/r then show a random image by keyword name
Otherwise 404
*/
func routeKeywords(w http.ResponseWriter, r *http.Request) {
uriChunks := chunkURI(r.URL.Path)
if (r.Method != "GET" ||
len(uriChunks) > 3 ||
(len(uriChunks) == 3 && uriChunks[2] != "r")) {
LogRequest(r,404)
http.NotFound(w,r)
return
}
log.Printf("K: %s (%d)", uriChunks, len(uriChunks))
params := parseRawQuery(r.URL.RawQuery)
log.Printf("K: params: %s", params)
var iter *mgo.Iter
if (len(uriChunks) == 1) {
// show a sorted list of tag name links
iter = gfs.Find(bson.M{"metadata": bson.M{"keywords": uriChunks[1] } }).Sort("$natural").Limit(100).Iter()
} else if (len(uriChunks) == 2) {
iter = gfs.Find(bson.M{"metadata": bson.M{"keywords": uriChunks[1] } }).Limit(10).Iter()
} else if (uriChunks[2] == "r") {
// TODO determine how to show a random image by keyword ...
log.Println("random isn't built yet")
LogRequest(r,404)
return
}
writeList(w, iter)
LogRequest(r,200)
}
func writeList(w http.ResponseWriter, iter *mgo.Iter) {
var this_file File
fmt.Fprintf(w, "<ul>\n")
for iter.Next(&this_file) {
log.Println(this_file.Filename)
fmt.Fprintf(w, "<li>%s - %d</li>\n",
linkToFile("", this_file.Filename),
this_file.UploadDate.Year())
}
fmt.Fprintf(w, "</ul>\n")
}
// Show a page of all the uploader's IPs, and the images
func routeExt(w http.ResponseWriter, r *http.Request) {
if (r.Method != "GET") {
LogRequest(r,404)
http.NotFound(w,r)
return
}
LogRequest(r,200)
}
// Show a page of all the uploader's IPs, and the images
func routeIPs(w http.ResponseWriter, r *http.Request) {
if (r.Method != "GET") {
LogRequest(r,404)
http.NotFound(w,r)
return
}
LogRequest(r,200)
}
func initMongo() {
mongo_session, err := mgo.Dial(MongoHost)
if err != nil {
log.Panic(err)
}
images_db = mongo_session.DB(MongoDB)
if (len(MongoUsername) > 0 && len(MongoPassword) > 0) {
err = images_db.Login(MongoUsername, MongoPassword)
if (err != nil) {
log.Panic(err)
}
}
gfs = images_db.GridFS("fs")
}
/* Run as the image server */
func runServer(ip, port string) {
var addr = fmt.Sprintf("%s:%s", ip, port)
initMongo()
defer mongo_session.Close()
http.HandleFunc("/", routeRoot)
http.HandleFunc("/all", routeAll)
http.HandleFunc("/f/", routeFiles)
http.HandleFunc("/k/", routeKeywords)
http.HandleFunc("/ip/", routeIPs)
http.HandleFunc("/ext/", routeExt)
//http.HandleFunc("/md5/", routeMD5s)
log.Printf("Serving on %s ...", addr)
log.Fatal(http.ListenAndServe(addr, nil))
}