commit 89c69cc1ff6f77f43369fac5a73f927217abb770 · kot.pink/core

+69

knotserver/archive.go

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       package knotserver

     

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       import (

     

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       	"compress/gzip"

     

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       	"fmt"

     

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       	"net/http"

     

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       	"strings"

     

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       	securejoin "github.com/cyphar/filepath-securejoin"

     

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       	"github.com/go-chi/chi/v5"

     

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       	"github.com/go-git/go-git/v5/plumbing"

     

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       	"tangled.org/core/knotserver/git"

     

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       )

     

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       func (h *Knot) Archive(w http.ResponseWriter, r *http.Request) {

     

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       	var (

     

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       		did  = chi.URLParam(r, "did")

     

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       		name = chi.URLParam(r, "name")

     

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       		ref  = chi.URLParam(r, "ref")

     

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       	)

     

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       	repo, err := securejoin.SecureJoin(did, name)

     

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       	if err != nil {

     

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       		gitError(w, "repository not found", http.StatusNotFound)

     

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       		h.l.Error("git: failed to secure join repo path", "handler", "InfoRefs", "error", err)

     

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       		return

     

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       	}

     

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       	repoPath, err := securejoin.SecureJoin(h.c.Repo.ScanPath, repo)

     

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       	if err != nil {

     

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       		gitError(w, "repository not found", http.StatusNotFound)

     

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       		h.l.Error("git: failed to secure join repo path", "handler", "InfoRefs", "error", err)

     

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       		return

     

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       	}

     

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       	gr, err := git.Open(repoPath, ref)

     

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       	immutableLink := fmt.Sprintf(

     

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       		"https://%s/%s/%s/archive/%s",

     

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       		h.c.Server.Hostname,

     

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       		did,

     

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       		name,

     

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       		gr.Hash(),

     

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       	)

     

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       	safeRefFilename := strings.ReplaceAll(plumbing.ReferenceName(ref).Short(), "/", "-")

     

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       	filename := fmt.Sprintf("%s-%s.tar.gz", name, safeRefFilename)

     

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       	w.Header().Set("Content-Disposition", fmt.Sprintf("attachment; filename=\"%s\"", filename))

     

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       	w.Header().Set("Content-Type", "application/gzip")

     

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       	w.Header().Set("Link", fmt.Sprintf("<%s>; rel=\"immutable\"", immutableLink))

     

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       	gw := gzip.NewWriter(w)

     

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       	defer gw.Close()

     

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       	err = gr.WriteTar(gw, "")

     

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       	if err != nil {

     

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       		// once we start writing to the body we can't report error anymore

     

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       		// so we are only left with logging the error

     

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       		h.l.Error("writing tar file", "error", err)

     

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       		return

     

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       	}

     

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       	err = gw.Flush()

     

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       	if err != nil {

     

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       		// once we start writing to the body we can't report error anymore

     

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       		// so we are only left with logging the error

     

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       		h.l.Error("flushing", "error", err.Error())

     

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       		return

     

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       	}

     

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       }

knotserver/git/git.go

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       	return &g, nil

     

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       }

     

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       func (g *GitRepo) Hash() plumbing.Hash {

     

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       	return g.h

     

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       }

     

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       // re-open a repository and update references

     

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       func (g *GitRepo) Refresh() error {

     

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       	refreshed, err := PlainOpen(g.path)