From 2bb6c5a8d60d79de9310208e0b5d4b1d4fe20dd2 Mon Sep 17 00:00:00 2001 From: Daniil Tsivinsky Date: Thu, 19 Feb 2026 14:57:33 +0300 Subject: [PATCH] init --- .gitignore | 1 + go.mod | 13 +++ go.sum | 73 ++++++++++++ main.go | 321 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 408 insertions(+) create mode 100644 .gitignore create mode 100644 go.mod create mode 100644 go.sum create mode 100644 main.go diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..d874ad6 --- /dev/null +++ b/.gitignore @@ -0,0 +1 @@ +*.tar diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..8485aec --- /dev/null +++ b/go.mod @@ -0,0 +1,13 @@ +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 +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..07e86be --- /dev/null +++ b/go.sum @@ -0,0 +1,73 @@ +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 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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= diff --git a/main.go b/main.go new file mode 100644 index 0000000..6b1b55c --- /dev/null +++ b/main.go @@ -0,0 +1,321 @@ +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) + } +}