imgsrv/server.go

842 lines
19 KiB
Go

package main
import (
"encoding/json"
"fmt"
"io"
"log"
"mime"
"net/http"
"os"
"path/filepath"
"strings"
"time"
"github.com/vbatts/go-httplog"
"github.com/vbatts/imgsrv/assets"
"github.com/vbatts/imgsrv/config"
"github.com/vbatts/imgsrv/dbutil"
_ "github.com/vbatts/imgsrv/dbutil/mongo"
"github.com/vbatts/imgsrv/hash"
"github.com/vbatts/imgsrv/types"
"github.com/vbatts/imgsrv/util"
)
var (
defaultPageLimit int = 25
maxBytes int64 = 1024 * 512
serverConfig config.Config
du dbutil.Handler
)
// Run as the file/image server
func runServer(c *config.Config) {
serverConfig = *c
var duConfig interface{}
var ok bool
if du, ok = dbutil.Handles[serverConfig.DbHandler]; !ok {
log.Fatalf("DbHandler %q not found", serverConfig.DbHandler)
}
if serverConfig.DbHandler == "mongo" {
duConfig = struct {
Seed string
User string
Pass string
DbName string
}{
serverConfig.MongoHost,
serverConfig.MongoUsername,
serverConfig.MongoPassword,
serverConfig.MongoDbName,
}
}
if err := du.Init(json.Marshal(duConfig)); err != nil {
log.Fatal(err)
}
defer du.Close() // TODO this ought to catch a signal to cleanup
http.HandleFunc("/", routeRoot)
http.HandleFunc("/favicon.ico", func(w http.ResponseWriter, r *http.Request) {
httplog.DefaultFavIcon.ServeHTTP(w, r)
})
http.HandleFunc("/assets/", routeAssets)
http.HandleFunc("/upload", routeUpload)
http.HandleFunc("/urlie", routeGetFromUrl)
http.HandleFunc("/all", routeAll)
http.HandleFunc("/f/", routeFiles)
http.HandleFunc("/v/", routeViews)
http.HandleFunc("/k/", routeKeywords)
http.HandleFunc("/md5/", routeMD5s)
http.HandleFunc("/ext/", routeExt)
http.HandleFunc("/ip/", routeIPs)
addr := fmt.Sprintf("%s:%s", c.Ip, c.Port)
log.Printf("Serving on %s ...", addr)
log.Fatal(http.ListenAndServe(addr, nil))
}
func serverErr(w http.ResponseWriter, r *http.Request, e error) {
httplog.LogRequest(r, 503)
log.Printf("Error: %s", e)
w.WriteHeader(503)
//ErrorPage(w, err)
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, "/")
}
func routeViewsGET(w http.ResponseWriter, r *http.Request) {
uriChunks := chunkURI(r.URL.Path)
if len(uriChunks) > 2 {
httplog.LogRequest(r, 404)
http.NotFound(w, r)
return
}
w.Header().Set("Content-Type", "text/html")
if len(uriChunks) == 2 && len(uriChunks[1]) > 0 {
file, err := du.GetFileByFilename(uriChunks[1])
if err != nil {
serverErr(w, r, err)
return
}
err = ImageViewPage(w, file)
if err != nil {
log.Printf("error: %s", err)
}
} else {
// no filename given, show them the full listing
http.Redirect(w, r, "/all", 302)
}
httplog.LogRequest(r, 200)
}
/*
GET /f/
GET /f/:name
*/
// Show a page of most recent images, and tags, and uploaders ...
func routeFilesGET(w http.ResponseWriter, r *http.Request) {
var err error
uriChunks := chunkURI(r.URL.Path)
if len(uriChunks) > 2 {
httplog.LogRequest(r, 404)
http.NotFound(w, r)
return
}
err = r.ParseForm()
if err != nil {
serverErr(w, r, err)
return
}
filename := strings.ToLower(uriChunks[1])
// if the Request got here by a delete request, confirm it
if (len(r.Form["delete"]) > 0 && r.Form["delete"][0] == "true") && (len(r.Form["confirm"]) > 0 && r.Form["confirm"][0] == "true") {
httplog.LogRequest(r, 200)
routeFilesDELETE(w, r)
return
} else if len(r.Form["delete"]) > 0 && r.Form["delete"][0] == "true" {
httplog.LogRequest(r, 200)
err = DeleteFilePage(w, filename)
if err != nil {
serverErr(w, r, err)
return
}
return
}
if len(uriChunks) == 2 && len(filename) > 0 {
log.Printf("Searching for [%s] ...", filename)
c, err := du.CountFiles(filename)
// preliminary checks, if they've passed an image name
if err != nil {
serverErr(w, r, err)
return
}
log.Printf("Results for [%s] = %d", filename, c)
if c == 0 {
httplog.LogRequest(r, 404)
http.NotFound(w, r)
return
}
ext := filepath.Ext(filename)
w.Header().Set("Content-Type", mime.TypeByExtension(ext))
w.Header().Set("Cache-Control", "max-age=315360000")
w.WriteHeader(http.StatusOK)
file, err := du.Open(filename)
if err != nil {
serverErr(w, r, err)
return
}
io.Copy(w, file) // send the contents of the file in the body
} else {
// no filename given, show them the full listing
http.Redirect(w, r, "/all", 302)
}
httplog.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) {
httplog.LogRequest(r, 403)
http.Error(w, "Not Acceptable", 403)
return
}
var filename string
info := types.Info{
Ip: r.RemoteAddr,
Random: hash.Rand64(),
TimeStamp: time.Now(),
}
err := r.ParseMultipartForm(maxBytes)
if err != nil {
serverErr(w, r, err)
return
}
// Keep it DRY?
if r.MultipartForm != nil {
routeUpload(w, r)
return
}
filename = r.FormValue("filename")
if len(filename) == 0 && len(uriChunks) == 2 && len(uriChunks[1]) != 0 {
filename = strings.ToLower(uriChunks[1])
}
log.Printf("%s\n", filename)
var p_ext string
p_ext = r.FormValue("ext")
if len(filename) > 0 && len(p_ext) == 0 {
p_ext = filepath.Ext(filename)
} else if len(p_ext) > 0 && strings.HasPrefix(p_ext, ".") {
p_ext = fmt.Sprintf(".%s", p_ext)
}
for _, word := range []string{
"k", "key", "keyword",
"keys", "keywords",
} {
v := r.FormValue(word)
if len(v) > 0 {
if strings.Contains(v, ",") {
for _, word := range strings.Split(v, ",") {
info.Keywords = append(info.Keywords, strings.Trim(word, " "))
}
} else {
info.Keywords = append(info.Keywords, strings.Trim(v, " "))
}
}
}
if len(filename) == 0 {
str := hash.GetSmallHash()
if len(p_ext) == 0 {
filename = fmt.Sprintf("%s.jpg", str)
} else {
filename = fmt.Sprintf("%s%s", str, p_ext)
}
}
exists, err := du.HasFileByFilename(filename)
if err == nil && !exists {
file, err := du.Create(filename)
defer file.Close()
if err != nil {
serverErr(w, r, err)
return
}
file.SetMeta(&info)
// copy the request body into the gfs file
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)
}
} else if exists {
if r.Method == "PUT" {
// TODO nothing will get here presently. Workflow needs more review
file, err := du.Open(filename)
defer file.Close()
if err != nil {
serverErr(w, r, err)
return
}
var mInfo types.Info
err = file.GetMeta(&mInfo)
if err != nil {
log.Printf("ERROR: failed to get metadata for %s. %s\n", filename, err)
}
mInfo.Keywords = append(mInfo.Keywords, info.Keywords...)
file.SetMeta(&mInfo)
} else {
log.Printf("[%s] already exists", filename)
}
} else {
serverErr(w, r, err)
return
}
if strings.Contains(r.Header.Get("Accept"), "text/html") {
io.WriteString(w,
fmt.Sprintf("<a href=\"/f/%s\">/f/%s</a>\n", filename, filename))
} else {
io.WriteString(w, fmt.Sprintf("/f/%s\n", filename))
}
httplog.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
httplog.LogRequest(r, 418)
}
func routeFilesDELETE(w http.ResponseWriter, r *http.Request) {
uriChunks := chunkURI(r.URL.Path)
if (len(uriChunks) > 2) || (len(uriChunks) == 2 && len(uriChunks[1]) == 0) {
httplog.LogRequest(r, 400)
http.Error(w, "Bad Syntax", 400)
return
}
exists, err := du.HasFileByFilename(uriChunks[1])
if err != nil {
serverErr(w, r, err)
return
}
if exists {
err = du.Remove(uriChunks[1])
if err != nil {
serverErr(w, r, err)
return
}
httplog.LogRequest(r, 302)
http.Redirect(w, r, "/", 302)
} else {
httplog.LogRequest(r, 404)
http.NotFound(w, r)
}
// delete the name in the path and/or parameter?
}
func routeViews(w http.ResponseWriter, r *http.Request) {
switch {
case r.Method == "GET":
routeViewsGET(w, r)
default:
httplog.LogRequest(r, 404)
http.NotFound(w, r)
return
}
}
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:
httplog.LogRequest(r, 404)
http.NotFound(w, r)
return
}
}
func routeRoot(w http.ResponseWriter, r *http.Request) {
if r.Method != "GET" {
httplog.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")
var files []types.File
files, err := du.GetFiles(defaultPageLimit)
if err != nil {
serverErr(w, r, err)
return
}
err = ListFilesPage(w, files)
if err != nil {
log.Printf("error: %s", err)
}
httplog.LogRequest(r, 200)
}
func routeAll(w http.ResponseWriter, r *http.Request) {
if r.Method != "GET" {
httplog.LogRequest(r, 404)
http.NotFound(w, r)
return
}
w.Header().Set("Content-Type", "text/html")
// Show a page of all the images
var files []types.File
files, err := du.GetFiles(-1)
if err != nil {
serverErr(w, r, err)
return
}
err = ListFilesPage(w, files)
if err != nil {
log.Printf("error: %s", err)
}
httplog.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") {
httplog.LogRequest(r, 404)
http.NotFound(w, r)
return
} else if len(uriChunks) == 1 || (len(uriChunks) == 2 && len(uriChunks[1]) == 0) {
// Path: /k/
// show a tag cloud!
kc, err := du.GetKeywords()
if err != nil {
serverErr(w, r, err)
return
}
err = ListTagCloudPage(w, kc)
if err != nil {
serverErr(w, r, err)
}
return
}
log.Printf("K: %s (%d)", uriChunks, len(uriChunks))
if uriChunks[len(uriChunks)-1] == "r" {
// Path: /k/
// TODO determine how to show a random image by keyword ...
log.Println("random isn't built yet")
httplog.LogRequest(r, 404)
return
}
var (
files []types.File
err error
)
if len(uriChunks) == 2 {
// Path: /k/:name
log.Println(uriChunks[1])
files, err = du.FindFilesByKeyword(uriChunks[1])
if err != nil {
serverErr(w, r, err)
return
}
}
log.Printf("collected %d files", len(files))
err = ListFilesPage(w, files)
if err != nil {
log.Printf("error: %s", err)
}
httplog.LogRequest(r, 200)
}
func routeMD5s(w http.ResponseWriter, r *http.Request) {
uriChunks := chunkURI(r.URL.Path)
if r.Method != "GET" {
httplog.LogRequest(r, 404)
http.NotFound(w, r)
return
} else if len(uriChunks) != 2 {
// Path: /md5/
kc, err := du.GetKeywords()
if err != nil {
serverErr(w, r, err)
return
}
err = ListTagCloudPage(w, kc)
if err != nil {
serverErr(w, r, err)
}
return
}
files, err := du.FindFilesByMd5(uriChunks[1])
if err != nil {
serverErr(w, r, err)
return
}
err = ListFilesPage(w, files)
if err != nil {
log.Printf("error: %s", err)
}
httplog.LogRequest(r, 200)
}
/*
GET /ext/
GET /ext/:name
GET /ext/:name/r
Show a page of file extensions, and allow paging by ext
If /ext/name/r then show a random image by keyword name
Otherwise 404
*/
func routeExt(w http.ResponseWriter, r *http.Request) {
uriChunks := chunkURI(r.URL.Path)
if r.Method != "GET" ||
len(uriChunks) > 3 ||
(len(uriChunks) == 3 && uriChunks[2] != "r") {
httplog.LogRequest(r, 404)
http.NotFound(w, r)
return
} else if len(uriChunks) == 1 || (len(uriChunks) == 2 && len(uriChunks[1]) == 0) {
// Path: /ext/
// tag cloud of extensions used
ic, err := du.GetExtensions()
if err != nil {
serverErr(w, r, err)
return
}
log.Printf("ext: %#v", ic)
err = ListTagCloudPage(w, ic)
if err != nil {
serverErr(w, r, err)
}
return
}
ext := strings.ToLower(uriChunks[1])
ext_pat := fmt.Sprintf("%s$", ext)
files, err := du.FindFilesByPatt(ext_pat)
if err != nil {
serverErr(w, r, err)
return
}
log.Printf("collected %d files, with ext %s", len(files), ext)
err = ListFilesPage(w, files)
if err != nil {
log.Printf("error: %s", err)
}
httplog.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" {
httplog.LogRequest(r, 404)
http.NotFound(w, r)
return
}
httplog.LogRequest(r, 200)
}
/*
GET /urlie
POST /urlie
*/
func routeGetFromUrl(w http.ResponseWriter, r *http.Request) {
if r.Method == "GET" {
err := UrliePage(w)
if err != nil {
log.Printf("error: %s", err)
}
httplog.LogRequest(r, 200)
return
}
if r.Method == "POST" {
var (
err error
stored_filename string
local_filename string
useRandName bool = false
info types.Info
)
info = types.Info{
Ip: r.RemoteAddr,
Random: hash.Rand64(),
TimeStamp: time.Now(),
}
log.Println(info)
err = r.ParseMultipartForm(1024 * 5)
if err != nil {
serverErr(w, r, err)
return
}
log.Printf("%q", r.MultipartForm.Value)
for k, v := range r.MultipartForm.Value {
if k == "keywords" {
info.Keywords = append(info.Keywords, strings.Split(v[0], ",")...)
} else if k == "url" {
local_filename, err = util.FetchFileFromURL(v[0])
if err != nil {
serverErr(w, r, err)
return
} else if len(local_filename) == 0 {
httplog.LogRequest(r, 404)
http.NotFound(w, r)
return
}
// Yay, hopefully we got an image!
} else if k == "rand" {
useRandName = true
} else {
log.Printf("WARN: not sure what to do with param [%s = %s]", k, v)
}
}
exists, err := du.HasFileByFilename(filepath.Base(strings.ToLower(local_filename)))
if err != nil {
serverErr(w, r, err)
return
}
if exists || useRandName {
ext := filepath.Ext(local_filename)
str := hash.GetSmallHash()
stored_filename = fmt.Sprintf("%s%s", str, ext)
} else {
stored_filename = filepath.Base(local_filename)
}
file, err := du.Create(stored_filename)
defer file.Close()
if err != nil {
serverErr(w, r, err)
return
}
local_fh, err := os.Open(local_filename)
defer local_fh.Close()
if err != nil {
serverErr(w, r, err)
return
}
file.SetMeta(&info)
// copy the request body into the gfs file
n, err := io.Copy(file, local_fh)
if err != nil {
serverErr(w, r, err)
return
}
log.Printf("Wrote [%d] bytes from %s to %s", n, local_filename, stored_filename)
http.Redirect(w, r, fmt.Sprintf("/v/%s", stored_filename), 302)
} else {
httplog.LogRequest(r, 404)
http.NotFound(w, r)
return
}
httplog.LogRequest(r, 200) // if we make it this far, then log success
}
/*
GET /upload
POST /upload
*/
func routeUpload(w http.ResponseWriter, r *http.Request) {
if r.Method == "GET" {
// Show the upload form
httplog.LogRequest(r, 200) // if we make it this far, then log success
err := UploadPage(w)
if err != nil {
log.Printf("error: %s", err)
}
return
}
if r.Method == "POST" {
info := types.Info{
Ip: r.RemoteAddr,
Random: hash.Rand64(),
TimeStamp: time.Now(),
}
// handle the form posting to this route
err := r.ParseMultipartForm(maxBytes)
if err != nil {
serverErr(w, r, err)
return
}
useRandName := false
returnUrl := false
log.Printf("%q", r.MultipartForm.Value)
for k, v := range r.MultipartForm.Value {
if k == "keywords" {
info.Keywords = append(info.Keywords, strings.Split(v[0], ",")...)
} else if k == "rand" {
useRandName = true
} else if k == "returnUrl" {
returnUrl = true
} else {
log.Printf("WARN: not sure what to do with param [%s = %s]", k, v)
}
}
log.Printf("%#v", r.MultipartForm.File)
filehdr := r.MultipartForm.File["filename"][0]
filename := filehdr.Filename
exists, err := du.HasFileByFilename(filename)
if err != nil {
serverErr(w, r, err)
return
}
if exists || useRandName {
ext := filepath.Ext(filename)
str := hash.GetSmallHash()
filename = strings.ToLower(fmt.Sprintf("%s%s", str, ext))
}
file, err := du.Create(filename)
defer file.Close()
if err != nil {
log.Printf("Failed to create on gfs: %s", err)
serverErr(w, r, err)
return
}
file.SetMeta(&info)
multiFile, err := filehdr.Open()
if err != nil {
log.Printf("Failed to open from MultipartForm: %s", err)
return
}
n, err := io.Copy(file, multiFile)
if err != nil {
log.Printf("Failed copy from MultipartForm to gfs: %s", err)
serverErr(w, r, err)
return
}
if n != r.ContentLength {
log.Printf("WARNING: [%s] content-length (%d), content written (%d)",
filename,
r.ContentLength,
n)
}
if returnUrl {
fmt.Fprintf(w, "/v/%s", filename)
return
}
http.Redirect(w, r, fmt.Sprintf("/v/%s", filename), 302)
} else {
httplog.LogRequest(r, 404)
http.NotFound(w, r)
return
}
httplog.LogRequest(r, 200) // if we make it this far, then log success
}
func routeAssets(w http.ResponseWriter, r *http.Request) {
path, err := filepath.Rel("/assets", r.URL.Path)
if err != nil {
serverErr(w, r, err)
return
}
w.Header().Set("Cache-Control", "max-age=315360000, public")
w.Header().Set("Expires", time.Now().AddDate(1, 0, 0).UTC().Format(time.RFC1123))
switch path {
case "bootstrap.css":
w.Header().Set("Content-Type", "text/css")
fmt.Fprintf(w, "%s", assets.BootstrapCss())
case "bootstrap.js":
w.Header().Set("Content-Type", "text/javascript")
fmt.Fprintf(w, "%s", assets.BootstrapJs())
case "jquery.js":
w.Header().Set("Content-Type", "text/javascript")
fmt.Fprintf(w, "%s", assets.JqueryJs())
case "jqud.js":
w.Header().Set("Content-Type", "text/javascript")
fmt.Fprintf(w, "%s", assets.TagCloudJs())
default:
httplog.LogRequest(r, 404)
http.NotFound(w, r)
return
}
httplog.LogRequest(r, 200) // if we make it this far, then log success
}