120 lines
2.8 KiB
Go
120 lines
2.8 KiB
Go
/*
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Copyright © 2019 Darko Luketic <info@icod.de>
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package server
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import (
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"bytes"
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"fmt"
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"net/http"
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"os/exec"
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"syscall"
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"time"
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"github.com/allegro/bigcache"
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"github.com/sirupsen/logrus"
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)
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type Handler struct {
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binary string
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baseParams []string
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uid int
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logger *logrus.Logger
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cache *bigcache.BigCache
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}
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func NewHandler(binary string, eviction time.Duration) *Handler {
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h := new(Handler)
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h.binary = binary
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h.uid = syscall.Getuid()
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h.baseParams = []string{
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"--disable-client-side-phishing-detection",
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"--disable-cloud-import",
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"--disable-default-apps",
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"--disable-dinosaur-easter-egg",
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"--disable-new-tab-first-run",
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"--disable-offer-upload-credit-cards",
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"--disable-signin-promo",
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"--disable-sync",
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"--disable-translate",
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"--hide-scrollbars",
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"--incognito",
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"--mute-audio",
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"--no-default-browser-check",
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"--no-first-run",
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"--noerrdialogs",
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"--password-store=basic",
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"--window-size=1280,1696",
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"--headless",
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"--disable-gpu",
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"--disable-software-rasterizer",
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"--dump-dom",
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}
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h.logger = logrus.StandardLogger()
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cacheConf := bigcache.DefaultConfig(eviction)
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cacheConf.HardMaxCacheSize = 500 * 1024 * 1024 // 500MB
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cache, e := bigcache.NewBigCache(cacheConf)
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if e != nil {
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h.logger.Fatal(e.Error())
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return nil
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}
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h.cache = cache
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return h
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}
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func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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b, e := h.FetchDom(fmt.Sprintf("https://%s%s", r.Host, r.RequestURI))
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if e != nil {
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h.logger.Error(e)
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if _, err := fmt.Fprintln(w, e.Error()); err != nil {
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h.logger.Error(e)
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return
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}
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return
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}
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if _, e := w.Write(b.Bytes()); e != nil {
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h.logger.Error(e)
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}
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}
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func (h *Handler) FetchDom(url string) (*bytes.Buffer, error) {
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b, e := h.cache.Get(url)
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if e != nil {
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if e == bigcache.ErrEntryNotFound {
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var params []string
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if h.uid == 0 {
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params = append(h.baseParams, "--no-sandbox")
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} else {
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params = h.baseParams
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}
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params = append(params, url)
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cmd := exec.Command(h.binary, params...)
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buf := bytes.NewBuffer(nil)
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cmd.Stdout = buf
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if e := cmd.Run(); e != nil {
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return nil, e
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}
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if e := h.cache.Set(url, buf.Bytes()); e != nil {
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h.logger.Error(e)
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}
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return buf, nil
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} else {
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return nil, e
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}
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}
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return bytes.NewBuffer(b), nil
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}
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