forked from tcp.direct/tcp.ac
generating delete keys and outputting json successfully
This commit is contained in:
parent
c9bfc3a302
commit
3e54b47a98
11
gouidtest.go
11
gouidtest.go
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@ -1,11 +0,0 @@
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package main
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import (
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"fmt"
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"github.com/twharmon/gouid"
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)
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func main() {
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s := gouid.String(8)
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fmt.Println(s)
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}
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@ -0,0 +1,183 @@
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package main
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import(
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valid "github.com/asaskevich/govalidator"
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exifremove "github.com/scottleedavis/go-exif-remove"
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"github.com/twharmon/gouid"
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"github.com/gin-gonic/gin"
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"encoding/json"
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_ "image/gif"
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"crypto/md5"
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"io/ioutil"
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"net/http"
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"image"
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"bytes"
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"fmt"
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"io"
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)
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type Post struct {
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Imgurl string `json:"Imgurl"`
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Delkey string `json:"Delkey"`
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}
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func postUpload(c *gin.Context, id string, key string) {
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imgurl := baseUrl + "i/" + string(id)
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keyurl := baseUrl + "i/d/" + string(key)
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d := Post{
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Imgurl: imgurl,
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Delkey: keyurl,
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}
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var p []byte
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p, err := json.Marshal(d)
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if err != nil {
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errThrow(c, http.StatusInternalServerError, err.Error(), "internal error")
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return
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}
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c.JSON(200, string(p)) // they weren't the original uploader so they don't get a delete key
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return
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}
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func imgView(c *gin.Context) {
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rUid := c.Param("uid")
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fmt.Println("[imgView] Received request")
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if (valid.IsAlphanumeric(rUid)) {
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fmt.Println("[imgView][" + rUid + "] Request validated")
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fBytes, _ := imgDB.Get([]byte(rUid))
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if fBytes == nil {
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fmt.Println("[imgView] No data found for: " + rUid)
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errThrow(c, 404, "404", "File not found")
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return
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}
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fmt.Println("[imgView][" + rUid + "] Detecting image type")
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file := bytes.NewReader(fBytes)
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imageFormat, ok := checkImage(file)
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if !ok {
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errThrow(c, http.StatusBadRequest, "bad request", "content does not appear to be an image")
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return
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} else { fmt.Println("[imgView][" + rUid + "] " + imageFormat + " detected") }
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contentType := "image/" + imageFormat
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c.Data(200, contentType, fBytes)
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}
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}
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func imgPost(c *gin.Context) {
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var Scrubbed []byte
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f, err := c.FormFile("upload")
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if err != nil {
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errThrow(c, http.StatusBadRequest, err.Error(), "no file detected within request\n")
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}
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fmt.Println("[imgPost] detected new upload: " + f.Filename)
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file, err := f.Open()
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if err != nil {
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errThrow(c, http.StatusInternalServerError, err.Error(), "error processing file\n")
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}
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fmt.Println("[imgPost] verifying file is an image")
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imageFormat, ok := checkImage(file)
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if !ok {
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errThrow(c, http.StatusBadRequest, "400", "input does not appear to be an image")
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return
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} else { fmt.Println("[imgPost] " + imageFormat + " detected") }
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fmt.Println("[imgPost] dumping byte form of file")
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fbytes, err := ioutil.ReadAll(file)
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if imageFormat != "gif" {
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fmt.Println("[imgPost] scrubbing exif")
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Scrubbed, err = exifremove.Remove(fbytes)
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if err != nil {
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errThrow(c, http.StatusInternalServerError, err.Error(), "error scrubbing exif")
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return
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}
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} else {
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fmt.Println("[imgPost] skipping exif scrub for gif image")
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Scrubbed = fbytes
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}
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fmt.Println("[imgPost] calculating MD5 hash")
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Hashr := md5.New()
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Hashr.Write(Scrubbed)
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hash := Hashr.Sum(nil)
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fmt.Println("[imgPost] Checking for duplicate's in database")
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imgRef, _ := md5DB.Get(hash)
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if imgRef != nil {
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fmt.Println("[imgPost][" + string(imgRef) + "] duplicate file found in md5 database, returning URL for uid: " + string(imgRef))
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postUpload(c,string(imgRef),"nil") // they weren't the original uploader so they don't get a delete key
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return
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}
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fmt.Println("[imgPost] no duplicate md5s found, generating uid and delete key")
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uid := gouid.String(5)
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key := gouid.String(16) // generate delete key
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// lets make sure that we don't clash even though its highly unlikely
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for uidRef, _ := imgDB.Get([]byte(uid)); uidRef != nil; {
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fmt.Println("[imgPost] uid already exists! generating new...")
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uid = gouid.String(5)
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}
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for keyRef, _ := keyDB.Get([]byte(uid)); keyRef != nil; {
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fmt.Println("[imgPost] delete key already exists! generating new...")
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key = gouid.String(16)
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}
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md5DB.Put([]byte(hash),[]byte(uid)) // save md5 to db to prevent dupes in the future
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fmt.Println("[imgPost][" + uid + "] saving file to database")
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err = imgDB.Put([]byte(uid), []byte(Scrubbed))
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if err != nil {
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errThrow(c, http.StatusInternalServerError, err.Error(), "upload failed")
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return
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}
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err = keyDB.Put([]byte("i." + uid), []byte(key)) // add delete key to database with image prefix
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if err != nil {
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errThrow(c, http.StatusInternalServerError, err.Error(), "internal error")
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return
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}
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fmt.Println("[imgPost][" + uid + "] saved to database successfully, returning JSON")
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postUpload(c, uid, key)
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}
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func checkImage(r io.ReadSeeker) (string, bool) {
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_, fmt, err := image.Decode(r)
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_, err2 := r.Seek(0, 0)
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if err != nil || err2 != nil {
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return "", false
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}
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return fmt, true
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}
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func getSize(s io.Seeker) (size int64, err error) {
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if _, err = s.Seek(0, 0); err != nil {
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return
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}
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// 2 == from the end of the file
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if size, err = s.Seek(0, 2); err != nil {
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return
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}
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_, err = s.Seek(0, 0)
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return
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}
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157
main.go
157
main.go
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@ -1,30 +1,20 @@
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package main
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import (
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valid "github.com/asaskevich/govalidator"
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"github.com/scottleedavis/go-exif-remove"
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"gopkg.in/natefinch/lumberjack.v2"
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"github.com/prologic/bitcask"
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"github.com/twharmon/gouid"
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"github.com/gin-gonic/gin"
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_ "image/gif"
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"crypto/md5"
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"io/ioutil"
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"net/http"
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"image"
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"bytes"
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"fmt"
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"log"
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"io"
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)
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var imgDB *bitcask.Bitcask
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var md5DB *bitcask.Bitcask
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var keyDB *bitcask.Bitcask
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var urlDB *bitcask.Bitcask
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var txtDB *bitcask.Bitcask
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var errLog *log.Logger
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var baseUrl string = "https://tcp.ac/"
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var baseUrl string = "http://127.0.0.1:8081/"
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var debugBool bool = true
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func errThrow(c *gin.Context, respcode int, Error string, msg string) {
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@ -34,130 +24,6 @@ func errThrow(c *gin.Context, respcode int, Error string, msg string) {
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}
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}
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func imgView(c *gin.Context) {
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rUid := c.Param("uid")
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fmt.Println("[imgView] Received request")
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if (valid.IsAlphanumeric(rUid)) {
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fmt.Println("[imgView][" + rUid + "] Request validated")
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fBytes, _ := imgDB.Get([]byte(rUid))
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if fBytes == nil {
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fmt.Println("[imgView] No data found for: " + rUid)
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errThrow(c, 404, "404", "File not found")
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return
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}
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fmt.Println("[imgView][" + rUid + "] Detecting image type")
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file := bytes.NewReader(fBytes)
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imageFormat, ok := checkImage(file)
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if !ok {
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errThrow(c, http.StatusBadRequest, "bad request", "content does not appear to be an image")
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return
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} else { fmt.Println("[imgView][" + rUid + "] " + imageFormat + " detected") }
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contentType := "image/" + imageFormat
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c.Data(200, contentType, fBytes)
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}
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}
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func imgPost(c *gin.Context) {
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var Scrubbed []byte
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f, err := c.FormFile("upload")
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if err != nil {
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errThrow(c, http.StatusBadRequest, err.Error(), "no file detected within request")
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}
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fmt.Println("[imgPost] detected new upload: " + f.Filename)
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file, err := f.Open()
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if err != nil {
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errThrow(c, http.StatusInternalServerError, err.Error(), "error processing file")
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}
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fmt.Println("[imgPost] verifying file is an image")
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imageFormat, ok := checkImage(file)
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if !ok {
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errThrow(c, http.StatusBadRequest, "400", "input does not appear to be an image")
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return
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} else { fmt.Println("[imgPost] " + imageFormat + " detected") }
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fmt.Println("[imgPost] generating uid")
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uid := gouid.String(5)
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fmt.Println("[imgPost][" + uid + "] dumping byte form of file")
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fbytes, err := ioutil.ReadAll(file)
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if imageFormat != "gif" {
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fmt.Println("[imgPost][" + uid + "] scrubbing exif")
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Scrubbed, err = exifremove.Remove(fbytes)
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if err != nil {
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errThrow(c, http.StatusInternalServerError, err.Error(), "error scrubbing exif")
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return
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}
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} else {
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fmt.Println("[imgPost][" + uid + "] skipping exif scrub for gif image")
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Scrubbed = fbytes
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}
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fmt.Println("[imgPost][" + uid + "] calculating MD5 hash")
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Hashr := md5.New()
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Hashr.Write(Scrubbed)
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hash := Hashr.Sum(nil)
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fmt.Printf("[imgPost][%s] MD5: %x\n", uid, hash)
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fmt.Println("[imgPost][" + uid + "] Checking for duplicate's in database")
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imgRef, _ := md5DB.Get(hash)
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if imgRef == nil {
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fmt.Println("[imgPost][" + uid + "] no dupes found, storing md5 hash into md5 database with callback uid")
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md5DB.Put([]byte(hash),[]byte(uid))
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} else {
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fmt.Println("[imgPost][" + string(imgRef) + "] duplicate file found in md5 database, returning URL for uid: " + string(imgRef))
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c.String(200,baseUrl + "i/" + string(imgRef) + "\n")
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return
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}
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fmt.Println("[imgPost][" + uid + "] saving file to database")
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err = imgDB.Put([]byte(uid), []byte(Scrubbed))
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if err != nil {
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errThrow(c, http.StatusInternalServerError, err.Error(), "error saving file")
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fmt.Println(err.Error())
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return
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} else {
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fmt.Println("[imgPost][" + uid + "] saved to database successfully, returning new URL")
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c.String(200,baseUrl + "i/" + string(uid) + "\n")
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}
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}
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func checkImage(r io.ReadSeeker) (string, bool) {
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_, fmt, err := image.Decode(r)
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_, err2 := r.Seek(0, 0)
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if err != nil || err2 != nil {
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return "", false
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}
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return fmt, true
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}
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func getSize(s io.Seeker) (size int64, err error) {
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if _, err = s.Seek(0, 0); err != nil {
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return
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}
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// 2 == from the end of the file
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if size, err = s.Seek(0, 2); err != nil {
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return
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}
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_, err = s.Seek(0, 0)
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return
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}
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//////////////////////////////////////////////////////
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func txtPost(c *gin.Context) {
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@ -193,17 +59,20 @@ func init() {
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opts := []bitcask.Option {
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bitcask.WithMaxValueSize(24 / 1024 / 1024),
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}
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imgDB, _ = bitcask.Open("img.db", opts...)
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fmt.Println("Opening img.db")
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keyDB, _ = bitcask.Open("./data/key", opts...)
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fmt.Println("Initializing key database")
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md5DB, _ = bitcask.Open("md5.db", opts...) // this will probably only be for images
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fmt.Println("Opening md5.db")
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imgDB, _ = bitcask.Open("./data/img", opts...)
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fmt.Println("Initializing img database")
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txtDB, _ = bitcask.Open("txt.db")
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fmt.Println("Opening txt.db")
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md5DB, _ = bitcask.Open("./data/md5", opts...) // this will probably only be for images
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fmt.Println("Initializing md5 database")
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urlDB, _ = bitcask.Open("url.db")
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fmt.Println("Opening url.db")
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txtDB, _ = bitcask.Open("./data/txt")
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fmt.Println("Initializing txt database")
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urlDB, _ = bitcask.Open("./data/url")
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fmt.Println("Initializing url database")
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////////////////////////////////////
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}
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