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This commit is contained in:
Dan Tsivinsky
2026-02-19 14:57:33 +03:00
commit 2bb6c5a8d6
4 changed files with 408 additions and 0 deletions
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1
.gitignore vendored Normal file
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*.tar

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go.mod Normal file
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module archiver
go 1.25.7
require (
github.com/PuerkitoBio/goquery v1.11.0
github.com/google/uuid v1.6.0
)
require (
github.com/andybalholm/cascadia v1.3.3 // indirect
golang.org/x/net v0.47.0 // indirect
)

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go.sum Normal file
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github.com/PuerkitoBio/goquery v1.11.0 h1:jZ7pwMQXIITcUXNH83LLk+txlaEy6NVOfTuP43xxfqw=
github.com/PuerkitoBio/goquery v1.11.0/go.mod h1:wQHgxUOU3JGuj3oD/QFfxUdlzW6xPHfqyHre6VMY4DQ=
github.com/andybalholm/cascadia v1.3.3 h1:AG2YHrzJIm4BZ19iwJ/DAua6Btl3IwJX+VI4kktS1LM=
github.com/andybalholm/cascadia v1.3.3/go.mod h1:xNd9bqTn98Ln4DwST8/nG+H0yuB8Hmgu1YHNnWw0GeA=
github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
golang.org/x/crypto v0.13.0/go.mod h1:y6Z2r+Rw4iayiXXAIxJIDAJ1zMW4yaTpebo8fPOliYc=
golang.org/x/crypto v0.19.0/go.mod h1:Iy9bg/ha4yyC70EfRS8jz+B6ybOBKMaSxLj6P6oBDfU=
golang.org/x/crypto v0.23.0/go.mod h1:CKFgDieR+mRhux2Lsu27y0fO304Db0wZe70UKqHu0v8=
golang.org/x/crypto v0.31.0/go.mod h1:kDsLvtWBEx7MV9tJOj9bnXsPbxwJQ6csT/x4KIN4Ssk=
golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
golang.org/x/mod v0.12.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
golang.org/x/mod v0.15.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
golang.org/x/mod v0.17.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
golang.org/x/net v0.6.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
golang.org/x/net v0.10.0/go.mod h1:0qNGK6F8kojg2nk9dLZ2mShWaEBan6FAoqfSigmmuDg=
golang.org/x/net v0.15.0/go.mod h1:idbUs1IY1+zTqbi8yxTbhexhEEk5ur9LInksu6HrEpk=
golang.org/x/net v0.21.0/go.mod h1:bIjVDfnllIU7BJ2DNgfnXvpSvtn8VRwhlsaeUTyUS44=
golang.org/x/net v0.25.0/go.mod h1:JkAGAh7GEvH74S6FOH42FLoXpXbE/aqXSrIQjXgsiwM=
golang.org/x/net v0.33.0/go.mod h1:HXLR5J+9DxmrqMwG9qjGCxZ+zKXxBru04zlTvWlWuN4=
golang.org/x/net v0.47.0 h1:Mx+4dIFzqraBXUugkia1OOvlD6LemFo1ALMHjrXDOhY=
golang.org/x/net v0.47.0/go.mod h1:/jNxtkgq5yWUGYkaZGqo27cfGZ1c5Nen03aYrrKpVRU=
golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.3.0/go.mod h1:FU7BRWz2tNW+3quACPkgCx/L+uEAv1htQ0V83Z9Rj+Y=
golang.org/x/sync v0.6.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
golang.org/x/sync v0.7.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
golang.org/x/sync v0.10.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.8.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
golang.org/x/sys v0.20.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
golang.org/x/sys v0.28.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
golang.org/x/telemetry v0.0.0-20240228155512-f48c80bd79b2/go.mod h1:TeRTkGYfJXctD9OcfyVLyj2J3IxLnKwHJR8f4D8a3YE=
golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
golang.org/x/term v0.8.0/go.mod h1:xPskH00ivmX89bAKVGSKKtLOWNx2+17Eiy94tnKShWo=
golang.org/x/term v0.12.0/go.mod h1:owVbMEjm3cBLCHdkQu9b1opXd4ETQWc3BhuQGKgXgvU=
golang.org/x/term v0.17.0/go.mod h1:lLRBjIVuehSbZlaOtGMbcMncT+aqLLLmKrsjNrUguwk=
golang.org/x/term v0.20.0/go.mod h1:8UkIAJTvZgivsXaD6/pH6U9ecQzZ45awqEOzuCvwpFY=
golang.org/x/term v0.27.0/go.mod h1:iMsnZpn0cago0GOrHO2+Y7u7JPn5AylBrcoWkElMTSM=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
golang.org/x/text v0.9.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=
golang.org/x/text v0.13.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
golang.org/x/text v0.15.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
golang.org/x/text v0.21.0/go.mod h1:4IBbMaMmOPCJ8SecivzSH54+73PCFmPWxNTLm+vZkEQ=
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
golang.org/x/tools v0.13.0/go.mod h1:HvlwmtVNQAhOuCjW7xxvovg8wbNq7LwfXh/k7wXUl58=
golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d/go.mod h1:aiJjzUbINMkxbQROHiO6hDPo2LHcIPhhQsa9DLh0yGk=
golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=

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main.go Normal file
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package main
import (
"archive/tar"
"bytes"
"fmt"
"io"
"log"
"mime"
"net/http"
"net/url"
"os"
"path"
"strings"
"github.com/PuerkitoBio/goquery"
"github.com/google/uuid"
)
func fetchUrl(url string) ([]byte, error) {
resp, err := http.Get(url)
if err != nil {
return nil, fmt.Errorf("failed to fetch url: %v", err)
}
defer resp.Body.Close()
data, err := io.ReadAll(resp.Body)
if err != nil {
return nil, fmt.Errorf("failed to read response: %v", err)
}
return data, nil
}
type TarFile struct {
Name string
Body []byte
}
func createTarball(files []TarFile) (bytes.Buffer, error) {
var buf bytes.Buffer
tw := tar.NewWriter(&buf)
for _, file := range files {
hdr := &tar.Header{
Name: file.Name,
Mode: 0644,
Size: int64(len(file.Body)),
}
if err := tw.WriteHeader(hdr); err != nil {
return buf, fmt.Errorf("failed to write tar header: %v", err)
}
// TODO: sometimes this fails with "write too long" as file written is larger than header size says it is
// don't know why yet, need to sleep
// good luck, future me
if _, err := tw.Write(file.Body); err != nil {
return buf, fmt.Errorf("failed to write file to tarball: %v", err)
}
}
if err := tw.Close(); err != nil {
return buf, fmt.Errorf("failed to close tar writer: %v", err)
}
return buf, nil
}
func findAllLinks(html []byte, baseUrl string) ([]TarFile, error) {
doc, err := goquery.NewDocumentFromReader(bytes.NewReader(html))
if err != nil {
return nil, fmt.Errorf("failed to create document from reader: %v", err)
}
files := []TarFile{}
doc.Find("head link").Each(func(i int, s *goquery.Selection) {
url := s.AttrOr("href", "")
if url == "" {
return
}
fileName := url
if strings.HasPrefix(url, "/") {
url = baseUrl + url
}
data, err := fetchUrl(url)
if err != nil {
log.Printf("failed to fetch url: %v\n", err)
return
}
files = append(files, TarFile{
Name: fileName,
Body: data,
})
})
doc.Find("script").Each(func(i int, s *goquery.Selection) {
src := s.AttrOr("src", "")
if src == "" {
return
}
fileName := src
if strings.HasPrefix(src, "/") {
src = baseUrl + src
}
data, err := fetchUrl(src)
if err != nil {
log.Printf("failed to fetch url: %v\n", err)
return
}
files = append(files, TarFile{
Name: fileName,
Body: data,
})
})
doc.Find("img").Each(func(i int, s *goquery.Selection) {
src := s.AttrOr("src", "")
if src == "" {
return
}
fileName := src
if strings.HasPrefix(src, "/") {
src = baseUrl + src
}
data, err := fetchUrl(src)
if err != nil {
log.Printf("failed to fetch url: %v\n", err)
return
}
files = append(files, TarFile{
Name: fileName,
Body: data,
})
})
return files, nil
}
type ReplaceFile struct {
Name string
Url string
}
func replaceLinks(buf *bytes.Buffer, files []ReplaceFile, baseUrl string) error {
doc, err := goquery.NewDocumentFromReader(buf)
if err != nil {
return fmt.Errorf("failed to create document from buffer: %v", err)
}
for _, file := range files {
ext := path.Ext(file.Name)
if ext == ".js" {
s := doc.Find(fmt.Sprintf(`script[src="%s"]`, file.Name))
if s != nil {
src := s.AttrOr("src", "")
if !strings.HasPrefix(src, "/") {
continue
}
s.SetAttr("src", baseUrl+src)
}
} else if ext == ".png" || ext == ".jpeg" || ext == ".jpg" || ext == ".svg" || ext == ".webp" {
s := doc.Find(fmt.Sprintf(`img[src="%s"]`, file.Name))
if s != nil {
src := s.AttrOr("src", "")
if !strings.HasPrefix(src, "/") {
continue
}
s.SetAttr("src", baseUrl+src)
}
} else {
s := doc.Find(fmt.Sprintf(`head link[href="%s"]`, file.Name))
if s != nil {
href := s.AttrOr("href", "")
if !strings.HasPrefix(href, "/") {
continue
}
s.SetAttr("href", baseUrl+href)
}
}
}
h, err := doc.Html()
if err != nil {
return fmt.Errorf("failed to get new html: %v", err)
}
if _, err := io.Copy(buf, bytes.NewReader([]byte(h))); err != nil {
return fmt.Errorf("failed to overwrite buffer with new html: %v", err)
}
return nil
}
func main() {
mux := http.NewServeMux()
mux.HandleFunc("GET /", func(w http.ResponseWriter, r *http.Request) {
siteUrl := r.URL.Query().Get("url")
if siteUrl == "" {
http.Error(w, "url parameter is required", 400)
return
}
html, err := fetchUrl(siteUrl)
if err != nil {
http.Error(w, fmt.Sprintf("failed to fetch html: %v", err), 500)
return
}
files := []TarFile{
{Name: "index.html", Body: html},
}
u, err := url.Parse(siteUrl)
if err != nil {
http.Error(w, fmt.Sprintf("failed to parse url: %v", err), 500)
return
}
baseSiteUrl := fmt.Sprintf("%s://%s", u.Scheme, u.Host)
otherFiles, err := findAllLinks(html, baseSiteUrl)
if err != nil {
http.Error(w, fmt.Sprintf("failed to find & download other files: %v", err), 500)
return
}
files = append(files, otherFiles...)
buf, err := createTarball(files)
if err != nil {
http.Error(w, fmt.Sprintf("failed to create tarball: %v", err), 500)
return
}
uid, err := uuid.NewV7()
if err != nil {
http.Error(w, fmt.Sprintf("failed to generate uuid: %v", err), 500)
return
}
fName := fmt.Sprintf("%s.tar", uid.String())
f, err := os.OpenFile(fName, os.O_CREATE|os.O_RDWR, 0644)
if err != nil {
http.Error(w, fmt.Sprintf("failed to open tar file: %v", err), 500)
return
}
defer f.Close()
if _, err := f.Write(buf.Bytes()); err != nil {
http.Error(w, fmt.Sprintf("failed to write data to tar file: %v", err), 500)
return
}
fmt.Fprintf(w, "%s", uid.String())
})
mux.HandleFunc("GET /{uuid}/", func(w http.ResponseWriter, r *http.Request) {
uid := r.PathValue("uuid")
fName := fmt.Sprintf("%s.tar", uid)
f, err := os.OpenFile(fName, os.O_RDONLY, 0644)
if err != nil {
http.Error(w, fmt.Sprintf("failed to open tarball: %v", err), 404)
return
}
defer f.Close()
urlFileName := "/" + strings.Join(strings.Split(r.URL.Path, "/")[2:], "/")
if urlFileName == "/" {
urlFileName = "index.html"
}
files := []ReplaceFile{}
var buf bytes.Buffer
tr := tar.NewReader(f)
for {
hdr, err := tr.Next()
if err == io.EOF {
break
}
if err != nil {
http.Error(w, fmt.Sprintf("failed to read tarball: %v", err), 500)
return
}
if hdr.Name == urlFileName {
if _, err := io.Copy(&buf, tr); err != nil {
return
}
}
files = append(files, ReplaceFile{
Name: hdr.Name,
Url: hdr.Name,
})
}
if urlFileName == "index.html" {
replaceLinks(&buf, files, "/"+uid)
}
w.Header().Set("Content-Type", mime.TypeByExtension(path.Ext(urlFileName)))
if _, err := io.Copy(w, &buf); err != nil {
http.Error(w, err.Error(), 500)
}
})
log.Println("starting http server")
if err := http.ListenAndServe(":5000", mux); err != nil {
log.Fatalf("failed to start http server: %v\n", err)
}
}