229 lines
4.8 KiB
Go
229 lines
4.8 KiB
Go
package main
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import (
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"crypto/sha1"
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"database/sql"
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"encoding/base64"
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"encoding/json"
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"encoding/xml"
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"fmt"
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"html"
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"io"
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"io/ioutil"
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"log"
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"net/http"
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"github.com/dchest/uniuri"
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"github.com/ewhal/pygments"
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_ "github.com/go-sql-driver/mysql"
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"github.com/gorilla/mux"
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)
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const (
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ADDRESS = "http://localhost:9900"
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LENGTH = 6
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PASTEARGS = ADDRESS + "/p/{PASTE}/(python|language)\n"
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URLARGS = ADDRESS + "save/XML|JSON\n"
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SOURCE = "Source: https://github.com/ewhal/Pastebin\n"
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TEXT = "$ <command> | curl -F 'p=<-' " + ADDRESS + "\n" + PASTEARGS + URLARGS + SOURCE
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PORT = ":9900"
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USERNAME = ""
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PASS = ""
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NAME = ""
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DATABASE = USERNAME + ":" + PASS + "@/" + NAME + "?charset=utf8"
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)
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type Response struct {
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ID string `json:"id"`
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HASH string `json:"hash"`
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URL string `json:"url"`
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SIZE int `json:"size"`
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DELKEY string `json:"delkey"`
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}
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func check(err error) {
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if err != nil {
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fmt.Println(err)
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}
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}
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func generateName() string {
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s := uniuri.NewLen(LENGTH)
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db, err := sql.Open("mysql", DATABASE)
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check(err)
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query, err := db.Query("select id from pastebin")
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for query.Next() {
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var id string
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err := query.Scan(&id)
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if err != nil {
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}
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if id == s {
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generateName()
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}
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}
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db.Close()
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return s
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}
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func hash(paste []byte) string {
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hasher := sha1.New()
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hasher.Write(paste)
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sha := base64.URLEncoding.EncodeToString(hasher.Sum(nil))
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return sha
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}
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func save(raw []byte) []string {
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p := raw[86 : len(raw)-46]
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db, err := sql.Open("mysql", DATABASE)
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check(err)
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sha := hash(p)
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query, err := db.Query("select id, hash, data, delkey from pastebin")
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for query.Next() {
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var id, hash, paste, delkey string
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err := query.Scan(&id, &hash, &paste, &delkey)
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check(err)
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if hash == sha {
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url := ADDRESS + "/p/" + id
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return []string{id, hash, url, paste, delkey}
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}
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}
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id := generateName()
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url := ADDRESS + "/p/" + id
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delKey := uniuri.NewLen(40)
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paste := html.EscapeString(string(p))
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stmt, err := db.Prepare("INSERT INTO pastebin(id, hash, data, delkey) values(?,?,?,?)")
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check(err)
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_, err = stmt.Exec(id, sha, paste, delKey)
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check(err)
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db.Close()
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return []string{id, sha, url, paste, delKey}
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}
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func delHandler(w http.ResponseWriter, r *http.Request) {
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vars := mux.Vars(r)
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paste := vars["pasteId"]
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delkey := vars["delKey"]
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db, err := sql.Open("mysql", DATABASE)
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check(err)
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stmt, err := db.Prepare("delete from pastebin where delkey=? id=?")
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check(err)
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res, err := stmt.Exec(html.EscapeString(delkey), html.EscapeString(paste))
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check(err)
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affect, err := res.RowsAffected()
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check(err)
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io.WriteString(w, string(affect))
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db.Close()
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}
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func saveHandler(w http.ResponseWriter, r *http.Request) {
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vars := mux.Vars(r)
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output := vars["output"]
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switch r.Method {
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case "POST":
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buf, err := ioutil.ReadAll(r.Body)
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if err != nil {
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http.Error(w, err.Error(), 500)
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}
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values := save(buf)
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b := &Response{
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ID: values[0],
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HASH: values[1],
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URL: values[2],
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SIZE: len(values[3]),
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DELKEY: values[4],
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}
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switch output {
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case "json":
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w.Header().Set("Content-Type", "application/json")
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err := json.NewEncoder(w).Encode(b)
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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case "xml":
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x, err := xml.MarshalIndent(b, "", " ")
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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w.Header().Set("Content-Type", "application/xml")
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w.Write(x)
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default:
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io.WriteString(w, b.URL+"\n")
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io.WriteString(w, "delete key: "+b.DELKEY+"\n")
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}
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}
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}
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func rootHandler(w http.ResponseWriter, r *http.Request) {
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io.WriteString(w, TEXT)
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}
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func langHandler(w http.ResponseWriter, r *http.Request) {
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vars := mux.Vars(r)
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paste := vars["pasteId"]
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lang := vars["lang"]
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s := getPaste(paste)
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highlight := pygments.Highlight(html.UnescapeString(s), html.EscapeString(lang), "html", "full, style=autumn,linenos=True, lineanchors=True,anchorlinenos=True,", "utf-8")
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io.WriteString(w, highlight)
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}
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func getPaste(paste string) string {
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param1 := html.EscapeString(paste)
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db, err := sql.Open("mysql", DATABASE)
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var s string
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err = db.QueryRow("select data from pastebin where id=?", param1).Scan(&s)
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db.Close()
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check(err)
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if err == sql.ErrNoRows {
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return "Error invalid paste"
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} else {
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return html.UnescapeString(s)
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}
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}
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func pasteHandler(w http.ResponseWriter, r *http.Request) {
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vars := mux.Vars(r)
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paste := vars["pasteId"]
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s := getPaste(paste)
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io.WriteString(w, s)
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}
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func main() {
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router := mux.NewRouter().StrictSlash(true)
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router.HandleFunc("/", rootHandler)
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router.HandleFunc("/p/{pasteId}", pasteHandler)
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router.HandleFunc("/p/{pasteId}/{lang}", langHandler)
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router.HandleFunc("/save", saveHandler)
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router.HandleFunc("/save/{output}", saveHandler)
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router.HandleFunc("/del/{pasteId}/{delKey}", delHandler)
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err := http.ListenAndServe(PORT, router)
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if err != nil {
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log.Fatal(err)
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}
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}
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