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|
package app
import (
"encoding/base64"
"io"
"net/http"
u "net/url"
"os"
"strconv"
"strings"
"syscall"
"text/template"
"time"
"git.macaw.me/skunky/devianter"
"golang.org/x/net/html"
)
/* INTERNAL */
func exit(msg string, code int) {
println(msg)
os.Exit(code)
}
func try(e error) {
if e != nil {
println(e.Error())
}
}
func try_with_exitstatus(err error, code int) {
if err != nil {
exit(err.Error(), code)
}
}
// some crap for frontend
func (s skunkyart) ExecuteTemplate(file string, data any) {
var buf strings.Builder
tmp := template.New(file)
tmp, e := tmp.Parse(Templates[file])
try(e)
try(tmp.Execute(&buf, &data))
wr(s.Writer, buf.String())
}
func UrlBuilder(strs ...string) string {
var str strings.Builder
l := len(strs)
str.WriteString(Host)
str.WriteString(CFG.BasePath)
for n, x := range strs {
str.WriteString(x)
if n+1 < l && !(strs[n+1][0] == '?' || strs[n+1][0] == '&') && !(x[0] == '?' || x[0] == '&') {
str.WriteString("/")
}
}
return str.String()
}
func (s skunkyart) ReturnHTTPError(status int) {
s.Writer.WriteHeader(status)
var msg strings.Builder
msg.WriteString(`<html><link rel="stylesheet" href="`)
msg.WriteString(UrlBuilder("stylesheet"))
msg.WriteString(`" /><h1>`)
msg.WriteString(strconv.Itoa(status))
msg.WriteString(" - ")
msg.WriteString(http.StatusText(status))
msg.WriteString("</h1></html>")
wr(s.Writer, msg.String())
}
type Downloaded struct {
Headers http.Header
Status int
Body []byte
}
func Download(url string) (d Downloaded) {
cli := &http.Client{}
if CFG.DownloadProxy != "" {
u, e := u.Parse(CFG.DownloadProxy)
try(e)
cli.Transport = &http.Transport{Proxy: http.ProxyURL(u)}
}
req, e := http.NewRequest("GET", url, nil)
try(e)
req.Header.Set("User-Agent", "Mozilla/5.0 (X11; Linux x86_64; rv:123.0) Gecko/20100101 Firefox/123.0.0")
resp, e := cli.Do(req)
try(e)
defer resp.Body.Close()
b, e := io.ReadAll(resp.Body)
try(e)
d.Body = b
d.Status = resp.StatusCode
d.Headers = resp.Header
return
}
// caching
func (s skunkyart) DownloadAndSendMedia(subdomain, path string) {
var url strings.Builder
url.WriteString("https://images-wixmp-")
url.WriteString(subdomain)
url.WriteString(".wixmp.com/")
url.WriteString(path)
url.WriteString("?token=")
url.WriteString(s.Args.Get("token"))
if CFG.Cache.Enabled {
fname := CFG.Cache.Path + "/" + base64.StdEncoding.EncodeToString([]byte(subdomain+path))
file, e := os.Open(fname)
if e != nil {
dwnld := Download(url.String())
if dwnld.Status == 200 && dwnld.Headers["Content-Type"][0][:5] == "image" {
try(os.WriteFile(fname, dwnld.Body, 0700))
s.Writer.Write(dwnld.Body)
}
} else {
file, e := io.ReadAll(file)
try(e)
s.Writer.Write(file)
}
} else if CFG.Proxy {
dwnld := Download(url.String())
s.Writer.Write(dwnld.Body)
} else {
s.Writer.WriteHeader(403)
s.Writer.Write([]byte("Sorry, butt proxy on this instance are disabled."))
}
}
func InitCacheSystem() {
c := &CFG.Cache
os.Mkdir(CFG.Cache.Path, 0700)
for {
dir, e := os.Open(c.Path)
try(e)
stat, e := dir.Stat()
try(e)
dirnames, e := dir.Readdirnames(-1)
try(e)
for _, a := range dirnames {
a = c.Path + "/" + a
if c.Lifetime != 0 {
now := time.Now().UnixMilli()
f, _ := os.Stat(a)
stat := f.Sys().(*syscall.Stat_t)
time := time.Unix(stat.Ctim.Unix()).UnixMilli()
if time+c.Lifetime <= now {
try(os.RemoveAll(a))
}
}
if c.MaxSize != 0 && stat.Size() > c.MaxSize {
try(os.RemoveAll(a))
}
}
dir.Close()
time.Sleep(time.Second * time.Duration(CFG.Cache.UpdateInterval))
}
}
func CopyTemplatesToMemory() {
for _, dirname := range CFG.Dirs {
dir, e := os.ReadDir(dirname)
try_with_exitstatus(e, 1)
for _, x := range dir {
file, e := os.ReadFile(dirname + "/" + x.Name())
try_with_exitstatus(e, 1)
Templates[x.Name()] = string(file)
}
}
}
/* PARSING HELPERS */
func ParseMedia(media devianter.Media) string {
url := devianter.UrlFromMedia(media)
if len(url) != 0 && CFG.Proxy {
url = url[21:]
dot := strings.Index(url, ".")
return UrlBuilder("media", "file", url[:dot], url[dot+11:])
}
return url
}
func ConvertDeviantArtUrlToSkunkyArt(url string) (output string) {
if len(url) > 32 && url[27:32] != "stash" {
url = url[27:]
toart := strings.Index(url, "/art/")
if toart != -1 {
output = UrlBuilder("post", url[:toart], url[toart+5:])
}
}
return
}
func BuildUserPlate(name string) string {
var htm strings.Builder
htm.WriteString(`<div class="user-plate"><img src="`)
htm.WriteString(UrlBuilder("media", "emojitar", name, "?type=a"))
htm.WriteString(`"><a href="`)
htm.WriteString(UrlBuilder("group_user", "?type=about&q=", name))
htm.WriteString(`">`)
htm.WriteString(name)
htm.WriteString(`</a></div>`)
return htm.String()
}
func GetValueOfTag(t *html.Tokenizer) string {
for tt := t.Next(); ; {
switch tt {
default:
return ""
case html.TextToken:
return string(t.Text())
}
}
}
// навигация по страницам
type DeviationList struct {
Pages int
More bool
}
// FIXME: на некоротрых артах первая страница может вызывать полное отсутствие панели навигации.
func (s skunkyart) NavBase(c DeviationList) string {
// TODO: сделать понятнее
// навигация по страницам
var list strings.Builder
list.WriteString("<br>")
p := s.Page
// функция для генерации ссылок
prevrev := func(msg string, page int, onpage bool) {
if !onpage {
list.WriteString(`<a href="?p=`)
list.WriteString(strconv.Itoa(page))
if s.Type != 0 {
list.WriteString("&type=")
list.WriteRune(s.Type)
}
if s.Query != "" {
list.WriteString("&q=")
list.WriteString(s.Query)
}
if f := s.Args.Get("folder"); f != "" {
list.WriteString("&folder=")
list.WriteString(f)
}
list.WriteString(`">`)
list.WriteString(msg)
list.WriteString("</a> ")
} else {
list.WriteString(strconv.Itoa(page))
list.WriteString(" ")
}
}
// вперёд-назад
if p > 1 {
prevrev("<= Prev |", p-1, false)
} else {
p = 1
}
if c.Pages > 0 {
// назад
for x := p - 6; x < p && x > 0; x++ {
prevrev(strconv.Itoa(x), x, false)
}
// вперёд
for x := p; x <= p+6 && c.Pages > p+6; x++ {
if x == p {
prevrev("", x, true)
x++
}
if x > p {
prevrev(strconv.Itoa(x), x, false)
}
}
}
// вперёд-назад
if c.More {
prevrev("| Next =>", p+1, false)
}
return list.String()
}
|
