kot.pink
1package knotserver
2
3import (
4 "compress/gzip"
5 "context"
6 "crypto/hmac"
7 "crypto/sha256"
8 "encoding/hex"
9 "encoding/json"
10 "errors"
11 "fmt"
12 "log"
13 "net/http"
14 "net/url"
15 "os"
16 "path/filepath"
17 "strconv"
18 "strings"
19 "sync"
20 "time"
21
22 securejoin "github.com/cyphar/filepath-securejoin"
23 "github.com/gliderlabs/ssh"
24 "github.com/go-chi/chi/v5"
25 gogit "github.com/go-git/go-git/v5"
26 "github.com/go-git/go-git/v5/plumbing"
27 "github.com/go-git/go-git/v5/plumbing/object"
28 "tangled.sh/tangled.sh/core/hook"
29 "tangled.sh/tangled.sh/core/knotserver/db"
30 "tangled.sh/tangled.sh/core/knotserver/git"
31 "tangled.sh/tangled.sh/core/patchutil"
32 "tangled.sh/tangled.sh/core/types"
33)
34
35func (h *Handle) Index(w http.ResponseWriter, r *http.Request) {
36 w.Write([]byte("This is a knot server. More info at https://tangled.sh"))
37}
38
39func (h *Handle) Capabilities(w http.ResponseWriter, r *http.Request) {
40 w.Header().Set("Content-Type", "application/json")
41
42 capabilities := map[string]any{
43 "pull_requests": map[string]any{
44 "format_patch": true,
45 "patch_submissions": true,
46 "branch_submissions": true,
47 "fork_submissions": true,
48 },
49 }
50
51 jsonData, err := json.Marshal(capabilities)
52 if err != nil {
53 http.Error(w, "Failed to serialize JSON", http.StatusInternalServerError)
54 return
55 }
56
57 w.Write(jsonData)
58}
59
60func (h *Handle) RepoIndex(w http.ResponseWriter, r *http.Request) {
61 path, _ := securejoin.SecureJoin(h.c.Repo.ScanPath, didPath(r))
62 l := h.l.With("path", path, "handler", "RepoIndex")
63 ref := chi.URLParam(r, "ref")
64 ref, _ = url.PathUnescape(ref)
65
66 gr, err := git.Open(path, ref)
67 if err != nil {
68 plain, err2 := git.PlainOpen(path)
69 if err2 != nil {
70 l.Error("opening repo", "error", err2.Error())
71 notFound(w)
72 return
73 }
74 branches, _ := plain.Branches()
75
76 log.Println(err)
77
78 if errors.Is(err, plumbing.ErrReferenceNotFound) {
79 resp := types.RepoIndexResponse{
80 IsEmpty: true,
81 Branches: branches,
82 }
83 writeJSON(w, resp)
84 return
85 } else {
86 l.Error("opening repo", "error", err.Error())
87 notFound(w)
88 return
89 }
90 }
91
92 var (
93 commits []*object.Commit
94 total int
95 branches []types.Branch
96 files []types.NiceTree
97 tags []*git.TagReference
98 )
99
100 var wg sync.WaitGroup
101 errorsCh := make(chan error, 5)
102
103 wg.Add(1)
104 go func() {
105 defer wg.Done()
106 cs, err := gr.Commits(0, 60)
107 if err != nil {
108 errorsCh <- fmt.Errorf("commits: %w", err)
109 return
110 }
111 commits = cs
112 }()
113
114 wg.Add(1)
115 go func() {
116 defer wg.Done()
117 t, err := gr.TotalCommits()
118 if err != nil {
119 errorsCh <- fmt.Errorf("calculating total: %w", err)
120 return
121 }
122 total = t
123 }()
124
125 wg.Add(1)
126 go func() {
127 defer wg.Done()
128 bs, err := gr.Branches()
129 if err != nil {
130 errorsCh <- fmt.Errorf("fetching branches: %w", err)
131 return
132 }
133 branches = bs
134 }()
135
136 wg.Add(1)
137 go func() {
138 defer wg.Done()
139 ts, err := gr.Tags()
140 if err != nil {
141 errorsCh <- fmt.Errorf("fetching tags: %w", err)
142 return
143 }
144 tags = ts
145 }()
146
147 wg.Add(1)
148 go func() {
149 defer wg.Done()
150 fs, err := gr.FileTree(r.Context(), "")
151 if err != nil {
152 errorsCh <- fmt.Errorf("fetching filetree: %w", err)
153 return
154 }
155 files = fs
156 }()
157
158 wg.Wait()
159 close(errorsCh)
160
161 // show any errors
162 for err := range errorsCh {
163 l.Error("loading repo", "error", err.Error())
164 writeError(w, err.Error(), http.StatusInternalServerError)
165 return
166 }
167
168 rtags := []*types.TagReference{}
169 for _, tag := range tags {
170 tr := types.TagReference{
171 Tag: tag.TagObject(),
172 }
173
174 tr.Reference = types.Reference{
175 Name: tag.Name(),
176 Hash: tag.Hash().String(),
177 }
178
179 if tag.Message() != "" {
180 tr.Message = tag.Message()
181 }
182
183 rtags = append(rtags, &tr)
184 }
185
186 var readmeContent string
187 var readmeFile string
188 for _, readme := range h.c.Repo.Readme {
189 content, _ := gr.FileContent(readme)
190 if len(content) > 0 {
191 readmeContent = string(content)
192 readmeFile = readme
193 }
194 }
195
196 if ref == "" {
197 mainBranch, err := gr.FindMainBranch()
198 if err != nil {
199 writeError(w, err.Error(), http.StatusInternalServerError)
200 l.Error("finding main branch", "error", err.Error())
201 return
202 }
203 ref = mainBranch
204 }
205
206 resp := types.RepoIndexResponse{
207 IsEmpty: false,
208 Ref: ref,
209 Commits: commits,
210 Description: getDescription(path),
211 Readme: readmeContent,
212 ReadmeFileName: readmeFile,
213 Files: files,
214 Branches: branches,
215 Tags: rtags,
216 TotalCommits: total,
217 }
218
219 writeJSON(w, resp)
220 return
221}
222
223func (h *Handle) RepoTree(w http.ResponseWriter, r *http.Request) {
224 treePath := chi.URLParam(r, "*")
225 ref := chi.URLParam(r, "ref")
226 ref, _ = url.PathUnescape(ref)
227
228 l := h.l.With("handler", "RepoTree", "ref", ref, "treePath", treePath)
229
230 path, _ := securejoin.SecureJoin(h.c.Repo.ScanPath, didPath(r))
231 gr, err := git.Open(path, ref)
232 if err != nil {
233 notFound(w)
234 return
235 }
236
237 files, err := gr.FileTree(r.Context(), treePath)
238 if err != nil {
239 writeError(w, err.Error(), http.StatusInternalServerError)
240 l.Error("file tree", "error", err.Error())
241 return
242 }
243
244 resp := types.RepoTreeResponse{
245 Ref: ref,
246 Parent: treePath,
247 Description: getDescription(path),
248 DotDot: filepath.Dir(treePath),
249 Files: files,
250 }
251
252 writeJSON(w, resp)
253 return
254}
255
256func (h *Handle) BlobRaw(w http.ResponseWriter, r *http.Request) {
257 treePath := chi.URLParam(r, "*")
258 ref := chi.URLParam(r, "ref")
259 ref, _ = url.PathUnescape(ref)
260
261 l := h.l.With("handler", "BlobRaw", "ref", ref, "treePath", treePath)
262
263 path, _ := securejoin.SecureJoin(h.c.Repo.ScanPath, didPath(r))
264 gr, err := git.Open(path, ref)
265 if err != nil {
266 notFound(w)
267 return
268 }
269
270 contents, err := gr.RawContent(treePath)
271 if err != nil {
272 writeError(w, err.Error(), http.StatusBadRequest)
273 l.Error("file content", "error", err.Error())
274 return
275 }
276
277 mimeType := http.DetectContentType(contents)
278
279 // exception for svg
280 if filepath.Ext(treePath) == ".svg" {
281 mimeType = "image/svg+xml"
282 }
283
284 if !strings.HasPrefix(mimeType, "image/") && !strings.HasPrefix(mimeType, "video/") {
285 l.Error("attempted to serve non-image/video file", "mimetype", mimeType)
286 writeError(w, "only image and video files can be accessed directly", http.StatusForbidden)
287 return
288 }
289
290 w.Header().Set("Cache-Control", "public, max-age=86400") // cache for 24 hours
291 w.Header().Set("ETag", fmt.Sprintf("%x", sha256.Sum256(contents)))
292 w.Header().Set("Content-Type", mimeType)
293 w.Write(contents)
294}
295
296func (h *Handle) Blob(w http.ResponseWriter, r *http.Request) {
297 treePath := chi.URLParam(r, "*")
298 ref := chi.URLParam(r, "ref")
299 ref, _ = url.PathUnescape(ref)
300
301 l := h.l.With("handler", "Blob", "ref", ref, "treePath", treePath)
302
303 path, _ := securejoin.SecureJoin(h.c.Repo.ScanPath, didPath(r))
304 gr, err := git.Open(path, ref)
305 if err != nil {
306 notFound(w)
307 return
308 }
309
310 var isBinaryFile bool = false
311 contents, err := gr.FileContent(treePath)
312 if errors.Is(err, git.ErrBinaryFile) {
313 isBinaryFile = true
314 } else if errors.Is(err, object.ErrFileNotFound) {
315 notFound(w)
316 return
317 } else if err != nil {
318 writeError(w, err.Error(), http.StatusInternalServerError)
319 return
320 }
321
322 bytes := []byte(contents)
323 // safe := string(sanitize(bytes))
324 sizeHint := len(bytes)
325
326 resp := types.RepoBlobResponse{
327 Ref: ref,
328 Contents: string(bytes),
329 Path: treePath,
330 IsBinary: isBinaryFile,
331 SizeHint: uint64(sizeHint),
332 }
333
334 h.showFile(resp, w, l)
335}
336
337func (h *Handle) Archive(w http.ResponseWriter, r *http.Request) {
338 name := chi.URLParam(r, "name")
339 file := chi.URLParam(r, "file")
340
341 l := h.l.With("handler", "Archive", "name", name, "file", file)
342
343 // TODO: extend this to add more files compression (e.g.: xz)
344 if !strings.HasSuffix(file, ".tar.gz") {
345 notFound(w)
346 return
347 }
348
349 ref := strings.TrimSuffix(file, ".tar.gz")
350
351 // This allows the browser to use a proper name for the file when
352 // downloading
353 filename := fmt.Sprintf("%s-%s.tar.gz", name, ref)
354 setContentDisposition(w, filename)
355 setGZipMIME(w)
356
357 path, _ := securejoin.SecureJoin(h.c.Repo.ScanPath, didPath(r))
358 gr, err := git.Open(path, ref)
359 if err != nil {
360 notFound(w)
361 return
362 }
363
364 gw := gzip.NewWriter(w)
365 defer gw.Close()
366
367 prefix := fmt.Sprintf("%s-%s", name, ref)
368 err = gr.WriteTar(gw, prefix)
369 if err != nil {
370 // once we start writing to the body we can't report error anymore
371 // so we are only left with printing the error.
372 l.Error("writing tar file", "error", err.Error())
373 return
374 }
375
376 err = gw.Flush()
377 if err != nil {
378 // once we start writing to the body we can't report error anymore
379 // so we are only left with printing the error.
380 l.Error("flushing?", "error", err.Error())
381 return
382 }
383}
384
385func (h *Handle) Log(w http.ResponseWriter, r *http.Request) {
386 ref := chi.URLParam(r, "ref")
387 ref, _ = url.PathUnescape(ref)
388
389 path, _ := securejoin.SecureJoin(h.c.Repo.ScanPath, didPath(r))
390
391 l := h.l.With("handler", "Log", "ref", ref, "path", path)
392
393 gr, err := git.Open(path, ref)
394 if err != nil {
395 notFound(w)
396 return
397 }
398
399 // Get page parameters
400 page := 1
401 pageSize := 30
402
403 if pageParam := r.URL.Query().Get("page"); pageParam != "" {
404 if p, err := strconv.Atoi(pageParam); err == nil && p > 0 {
405 page = p
406 }
407 }
408
409 if pageSizeParam := r.URL.Query().Get("per_page"); pageSizeParam != "" {
410 if ps, err := strconv.Atoi(pageSizeParam); err == nil && ps > 0 {
411 pageSize = ps
412 }
413 }
414
415 // convert to offset/limit
416 offset := (page - 1) * pageSize
417 limit := pageSize
418
419 commits, err := gr.Commits(offset, limit)
420 if err != nil {
421 writeError(w, err.Error(), http.StatusInternalServerError)
422 l.Error("fetching commits", "error", err.Error())
423 return
424 }
425
426 total := len(commits)
427
428 resp := types.RepoLogResponse{
429 Commits: commits,
430 Ref: ref,
431 Description: getDescription(path),
432 Log: true,
433 Total: total,
434 Page: page,
435 PerPage: pageSize,
436 }
437
438 writeJSON(w, resp)
439 return
440}
441
442func (h *Handle) Diff(w http.ResponseWriter, r *http.Request) {
443 ref := chi.URLParam(r, "ref")
444 ref, _ = url.PathUnescape(ref)
445
446 l := h.l.With("handler", "Diff", "ref", ref)
447
448 path, _ := securejoin.SecureJoin(h.c.Repo.ScanPath, didPath(r))
449 gr, err := git.Open(path, ref)
450 if err != nil {
451 notFound(w)
452 return
453 }
454
455 diff, err := gr.Diff()
456 if err != nil {
457 writeError(w, err.Error(), http.StatusInternalServerError)
458 l.Error("getting diff", "error", err.Error())
459 return
460 }
461
462 resp := types.RepoCommitResponse{
463 Ref: ref,
464 Diff: diff,
465 }
466
467 writeJSON(w, resp)
468 return
469}
470
471func (h *Handle) Tags(w http.ResponseWriter, r *http.Request) {
472 path, _ := securejoin.SecureJoin(h.c.Repo.ScanPath, didPath(r))
473 l := h.l.With("handler", "Refs")
474
475 gr, err := git.Open(path, "")
476 if err != nil {
477 notFound(w)
478 return
479 }
480
481 tags, err := gr.Tags()
482 if err != nil {
483 // Non-fatal, we *should* have at least one branch to show.
484 l.Warn("getting tags", "error", err.Error())
485 }
486
487 rtags := []*types.TagReference{}
488 for _, tag := range tags {
489 tr := types.TagReference{
490 Tag: tag.TagObject(),
491 }
492
493 tr.Reference = types.Reference{
494 Name: tag.Name(),
495 Hash: tag.Hash().String(),
496 }
497
498 if tag.Message() != "" {
499 tr.Message = tag.Message()
500 }
501
502 rtags = append(rtags, &tr)
503 }
504
505 resp := types.RepoTagsResponse{
506 Tags: rtags,
507 }
508
509 writeJSON(w, resp)
510 return
511}
512
513func (h *Handle) Branches(w http.ResponseWriter, r *http.Request) {
514 path, _ := securejoin.SecureJoin(h.c.Repo.ScanPath, didPath(r))
515
516 gr, err := git.PlainOpen(path)
517 if err != nil {
518 notFound(w)
519 return
520 }
521
522 branches, _ := gr.Branches()
523
524 resp := types.RepoBranchesResponse{
525 Branches: branches,
526 }
527
528 writeJSON(w, resp)
529 return
530}
531
532func (h *Handle) Branch(w http.ResponseWriter, r *http.Request) {
533 path, _ := securejoin.SecureJoin(h.c.Repo.ScanPath, didPath(r))
534 branchName := chi.URLParam(r, "branch")
535 branchName, _ = url.PathUnescape(branchName)
536
537 l := h.l.With("handler", "Branch")
538
539 gr, err := git.PlainOpen(path)
540 if err != nil {
541 notFound(w)
542 return
543 }
544
545 ref, err := gr.Branch(branchName)
546 if err != nil {
547 l.Error("getting branch", "error", err.Error())
548 writeError(w, err.Error(), http.StatusInternalServerError)
549 return
550 }
551
552 commit, err := gr.Commit(ref.Hash())
553 if err != nil {
554 l.Error("getting commit object", "error", err.Error())
555 writeError(w, err.Error(), http.StatusInternalServerError)
556 return
557 }
558
559 defaultBranch, err := gr.FindMainBranch()
560 isDefault := false
561 if err != nil {
562 l.Error("getting default branch", "error", err.Error())
563 // do not quit though
564 } else if defaultBranch == branchName {
565 isDefault = true
566 }
567
568 resp := types.RepoBranchResponse{
569 Branch: types.Branch{
570 Reference: types.Reference{
571 Name: ref.Name().Short(),
572 Hash: ref.Hash().String(),
573 },
574 Commit: commit,
575 IsDefault: isDefault,
576 },
577 }
578
579 writeJSON(w, resp)
580 return
581}
582
583func (h *Handle) Keys(w http.ResponseWriter, r *http.Request) {
584 l := h.l.With("handler", "Keys")
585
586 switch r.Method {
587 case http.MethodGet:
588 keys, err := h.db.GetAllPublicKeys()
589 if err != nil {
590 writeError(w, err.Error(), http.StatusInternalServerError)
591 l.Error("getting public keys", "error", err.Error())
592 return
593 }
594
595 data := make([]map[string]any, 0)
596 for _, key := range keys {
597 j := key.JSON()
598 data = append(data, j)
599 }
600 writeJSON(w, data)
601 return
602
603 case http.MethodPut:
604 pk := db.PublicKey{}
605 if err := json.NewDecoder(r.Body).Decode(&pk); err != nil {
606 writeError(w, "invalid request body", http.StatusBadRequest)
607 return
608 }
609
610 _, _, _, _, err := ssh.ParseAuthorizedKey([]byte(pk.Key))
611 if err != nil {
612 writeError(w, "invalid pubkey", http.StatusBadRequest)
613 }
614
615 if err := h.db.AddPublicKey(pk); err != nil {
616 writeError(w, err.Error(), http.StatusInternalServerError)
617 l.Error("adding public key", "error", err.Error())
618 return
619 }
620
621 w.WriteHeader(http.StatusNoContent)
622 return
623 }
624}
625
626func (h *Handle) NewRepo(w http.ResponseWriter, r *http.Request) {
627 l := h.l.With("handler", "NewRepo")
628
629 data := struct {
630 Did string `json:"did"`
631 Name string `json:"name"`
632 DefaultBranch string `json:"default_branch,omitempty"`
633 }{}
634
635 if err := json.NewDecoder(r.Body).Decode(&data); err != nil {
636 writeError(w, "invalid request body", http.StatusBadRequest)
637 return
638 }
639
640 if data.DefaultBranch == "" {
641 data.DefaultBranch = h.c.Repo.MainBranch
642 }
643
644 did := data.Did
645 name := data.Name
646 defaultBranch := data.DefaultBranch
647
648 if err := validateRepoName(name); err != nil {
649 l.Error("creating repo", "error", err.Error())
650 writeError(w, err.Error(), http.StatusBadRequest)
651 return
652 }
653
654 relativeRepoPath := filepath.Join(did, name)
655 repoPath, _ := securejoin.SecureJoin(h.c.Repo.ScanPath, relativeRepoPath)
656 err := git.InitBare(repoPath, defaultBranch)
657 if err != nil {
658 l.Error("initializing bare repo", "error", err.Error())
659 if errors.Is(err, gogit.ErrRepositoryAlreadyExists) {
660 writeError(w, "That repo already exists!", http.StatusConflict)
661 return
662 } else {
663 writeError(w, err.Error(), http.StatusInternalServerError)
664 return
665 }
666 }
667
668 // add perms for this user to access the repo
669 err = h.e.AddRepo(did, ThisServer, relativeRepoPath)
670 if err != nil {
671 l.Error("adding repo permissions", "error", err.Error())
672 writeError(w, err.Error(), http.StatusInternalServerError)
673 return
674 }
675
676 hook.SetupRepo(
677 hook.Config(
678 hook.WithScanPath(h.c.Repo.ScanPath),
679 hook.WithInternalApi(h.c.Server.InternalListenAddr),
680 ),
681 repoPath,
682 )
683
684 w.WriteHeader(http.StatusNoContent)
685}
686
687func (h *Handle) RepoForkAheadBehind(w http.ResponseWriter, r *http.Request) {
688 l := h.l.With("handler", "RepoForkSync")
689
690 data := struct {
691 Did string `json:"did"`
692 Source string `json:"source"`
693 Name string `json:"name,omitempty"`
694 HiddenRef string `json:"hiddenref"`
695 }{}
696
697 if err := json.NewDecoder(r.Body).Decode(&data); err != nil {
698 writeError(w, "invalid request body", http.StatusBadRequest)
699 return
700 }
701
702 did := data.Did
703 source := data.Source
704
705 if did == "" || source == "" {
706 l.Error("invalid request body, empty did or name")
707 w.WriteHeader(http.StatusBadRequest)
708 return
709 }
710
711 var name string
712 if data.Name != "" {
713 name = data.Name
714 } else {
715 name = filepath.Base(source)
716 }
717
718 branch := chi.URLParam(r, "branch")
719 branch, _ = url.PathUnescape(branch)
720
721 relativeRepoPath := filepath.Join(did, name)
722 repoPath, _ := securejoin.SecureJoin(h.c.Repo.ScanPath, relativeRepoPath)
723
724 gr, err := git.PlainOpen(repoPath)
725 if err != nil {
726 log.Println(err)
727 notFound(w)
728 return
729 }
730
731 forkCommit, err := gr.ResolveRevision(branch)
732 if err != nil {
733 l.Error("error resolving ref revision", "msg", err.Error())
734 writeError(w, fmt.Sprintf("error resolving revision %s", branch), http.StatusBadRequest)
735 return
736 }
737
738 sourceCommit, err := gr.ResolveRevision(data.HiddenRef)
739 if err != nil {
740 l.Error("error resolving hidden ref revision", "msg", err.Error())
741 writeError(w, fmt.Sprintf("error resolving revision %s", data.HiddenRef), http.StatusBadRequest)
742 return
743 }
744
745 status := types.UpToDate
746 if forkCommit.Hash.String() != sourceCommit.Hash.String() {
747 isAncestor, err := forkCommit.IsAncestor(sourceCommit)
748 if err != nil {
749 log.Printf("error resolving whether %s is ancestor of %s: %s", branch, data.HiddenRef, err)
750 return
751 }
752
753 if isAncestor {
754 status = types.FastForwardable
755 } else {
756 status = types.Conflict
757 }
758 }
759
760 w.Header().Set("Content-Type", "application/json")
761 json.NewEncoder(w).Encode(types.AncestorCheckResponse{Status: status})
762}
763
764func (h *Handle) RepoLanguages(w http.ResponseWriter, r *http.Request) {
765 repoPath, _ := securejoin.SecureJoin(h.c.Repo.ScanPath, didPath(r))
766 ref := chi.URLParam(r, "ref")
767 ref, _ = url.PathUnescape(ref)
768
769 l := h.l.With("handler", "RepoLanguages")
770
771 gr, err := git.Open(repoPath, ref)
772 if err != nil {
773 l.Error("opening repo", "error", err.Error())
774 notFound(w)
775 return
776 }
777
778 ctx, cancel := context.WithTimeout(r.Context(), 1*time.Second)
779 defer cancel()
780
781 sizes, err := gr.AnalyzeLanguages(ctx)
782 if err != nil {
783 l.Error("failed to analyze languages", "error", err.Error())
784 writeError(w, err.Error(), http.StatusNoContent)
785 return
786 }
787
788 resp := types.RepoLanguageResponse{Languages: sizes}
789
790 writeJSON(w, resp)
791}
792
793func (h *Handle) RepoForkSync(w http.ResponseWriter, r *http.Request) {
794 l := h.l.With("handler", "RepoForkSync")
795
796 data := struct {
797 Did string `json:"did"`
798 Source string `json:"source"`
799 Name string `json:"name,omitempty"`
800 }{}
801
802 if err := json.NewDecoder(r.Body).Decode(&data); err != nil {
803 writeError(w, "invalid request body", http.StatusBadRequest)
804 return
805 }
806
807 did := data.Did
808 source := data.Source
809
810 if did == "" || source == "" {
811 l.Error("invalid request body, empty did or name")
812 w.WriteHeader(http.StatusBadRequest)
813 return
814 }
815
816 var name string
817 if data.Name != "" {
818 name = data.Name
819 } else {
820 name = filepath.Base(source)
821 }
822
823 branch := chi.URLParam(r, "branch")
824 branch, _ = url.PathUnescape(branch)
825
826 relativeRepoPath := filepath.Join(did, name)
827 repoPath, _ := securejoin.SecureJoin(h.c.Repo.ScanPath, relativeRepoPath)
828
829 gr, err := git.PlainOpen(repoPath)
830 if err != nil {
831 log.Println(err)
832 notFound(w)
833 return
834 }
835
836 err = gr.Sync(branch)
837 if err != nil {
838 l.Error("error syncing repo fork", "error", err.Error())
839 writeError(w, err.Error(), http.StatusInternalServerError)
840 return
841 }
842
843 w.WriteHeader(http.StatusNoContent)
844}
845
846func (h *Handle) RepoFork(w http.ResponseWriter, r *http.Request) {
847 l := h.l.With("handler", "RepoFork")
848
849 data := struct {
850 Did string `json:"did"`
851 Source string `json:"source"`
852 Name string `json:"name,omitempty"`
853 }{}
854
855 if err := json.NewDecoder(r.Body).Decode(&data); err != nil {
856 writeError(w, "invalid request body", http.StatusBadRequest)
857 return
858 }
859
860 did := data.Did
861 source := data.Source
862
863 if did == "" || source == "" {
864 l.Error("invalid request body, empty did or name")
865 w.WriteHeader(http.StatusBadRequest)
866 return
867 }
868
869 var name string
870 if data.Name != "" {
871 name = data.Name
872 } else {
873 name = filepath.Base(source)
874 }
875
876 relativeRepoPath := filepath.Join(did, name)
877 repoPath, _ := securejoin.SecureJoin(h.c.Repo.ScanPath, relativeRepoPath)
878
879 err := git.Fork(repoPath, source)
880 if err != nil {
881 l.Error("forking repo", "error", err.Error())
882 writeError(w, err.Error(), http.StatusInternalServerError)
883 return
884 }
885
886 // add perms for this user to access the repo
887 err = h.e.AddRepo(did, ThisServer, relativeRepoPath)
888 if err != nil {
889 l.Error("adding repo permissions", "error", err.Error())
890 writeError(w, err.Error(), http.StatusInternalServerError)
891 return
892 }
893
894 hook.SetupRepo(
895 hook.Config(
896 hook.WithScanPath(h.c.Repo.ScanPath),
897 hook.WithInternalApi(h.c.Server.InternalListenAddr),
898 ),
899 repoPath,
900 )
901
902 w.WriteHeader(http.StatusNoContent)
903}
904
905func (h *Handle) RemoveRepo(w http.ResponseWriter, r *http.Request) {
906 l := h.l.With("handler", "RemoveRepo")
907
908 data := struct {
909 Did string `json:"did"`
910 Name string `json:"name"`
911 }{}
912
913 if err := json.NewDecoder(r.Body).Decode(&data); err != nil {
914 writeError(w, "invalid request body", http.StatusBadRequest)
915 return
916 }
917
918 did := data.Did
919 name := data.Name
920
921 if did == "" || name == "" {
922 l.Error("invalid request body, empty did or name")
923 w.WriteHeader(http.StatusBadRequest)
924 return
925 }
926
927 relativeRepoPath := filepath.Join(did, name)
928 repoPath, _ := securejoin.SecureJoin(h.c.Repo.ScanPath, relativeRepoPath)
929 err := os.RemoveAll(repoPath)
930 if err != nil {
931 l.Error("removing repo", "error", err.Error())
932 writeError(w, err.Error(), http.StatusInternalServerError)
933 return
934 }
935
936 w.WriteHeader(http.StatusNoContent)
937
938}
939func (h *Handle) Merge(w http.ResponseWriter, r *http.Request) {
940 path, _ := securejoin.SecureJoin(h.c.Repo.ScanPath, didPath(r))
941
942 data := types.MergeRequest{}
943
944 if err := json.NewDecoder(r.Body).Decode(&data); err != nil {
945 writeError(w, err.Error(), http.StatusBadRequest)
946 h.l.Error("git: failed to unmarshal json patch", "handler", "Merge", "error", err)
947 return
948 }
949
950 mo := &git.MergeOptions{
951 AuthorName: data.AuthorName,
952 AuthorEmail: data.AuthorEmail,
953 CommitBody: data.CommitBody,
954 CommitMessage: data.CommitMessage,
955 }
956
957 patch := data.Patch
958 branch := data.Branch
959 gr, err := git.Open(path, branch)
960 if err != nil {
961 notFound(w)
962 return
963 }
964
965 mo.FormatPatch = patchutil.IsFormatPatch(patch)
966
967 if err := gr.MergeWithOptions([]byte(patch), branch, mo); err != nil {
968 var mergeErr *git.ErrMerge
969 if errors.As(err, &mergeErr) {
970 conflicts := make([]types.ConflictInfo, len(mergeErr.Conflicts))
971 for i, conflict := range mergeErr.Conflicts {
972 conflicts[i] = types.ConflictInfo{
973 Filename: conflict.Filename,
974 Reason: conflict.Reason,
975 }
976 }
977 response := types.MergeCheckResponse{
978 IsConflicted: true,
979 Conflicts: conflicts,
980 Message: mergeErr.Message,
981 }
982 writeConflict(w, response)
983 h.l.Error("git: merge conflict", "handler", "Merge", "error", mergeErr)
984 } else {
985 writeError(w, err.Error(), http.StatusBadRequest)
986 h.l.Error("git: failed to merge", "handler", "Merge", "error", err.Error())
987 }
988 return
989 }
990
991 w.WriteHeader(http.StatusOK)
992}
993
994func (h *Handle) MergeCheck(w http.ResponseWriter, r *http.Request) {
995 path, _ := securejoin.SecureJoin(h.c.Repo.ScanPath, didPath(r))
996
997 var data struct {
998 Patch string `json:"patch"`
999 Branch string `json:"branch"`
1000 }
1001
1002 if err := json.NewDecoder(r.Body).Decode(&data); err != nil {
1003 writeError(w, err.Error(), http.StatusBadRequest)
1004 h.l.Error("git: failed to unmarshal json patch", "handler", "MergeCheck", "error", err)
1005 return
1006 }
1007
1008 patch := data.Patch
1009 branch := data.Branch
1010 gr, err := git.Open(path, branch)
1011 if err != nil {
1012 notFound(w)
1013 return
1014 }
1015
1016 err = gr.MergeCheck([]byte(patch), branch)
1017 if err == nil {
1018 response := types.MergeCheckResponse{
1019 IsConflicted: false,
1020 }
1021 writeJSON(w, response)
1022 return
1023 }
1024
1025 var mergeErr *git.ErrMerge
1026 if errors.As(err, &mergeErr) {
1027 conflicts := make([]types.ConflictInfo, len(mergeErr.Conflicts))
1028 for i, conflict := range mergeErr.Conflicts {
1029 conflicts[i] = types.ConflictInfo{
1030 Filename: conflict.Filename,
1031 Reason: conflict.Reason,
1032 }
1033 }
1034 response := types.MergeCheckResponse{
1035 IsConflicted: true,
1036 Conflicts: conflicts,
1037 Message: mergeErr.Message,
1038 }
1039 writeConflict(w, response)
1040 h.l.Error("git: merge conflict", "handler", "MergeCheck", "error", mergeErr.Error())
1041 return
1042 }
1043 writeError(w, err.Error(), http.StatusInternalServerError)
1044 h.l.Error("git: failed to check merge", "handler", "MergeCheck", "error", err.Error())
1045}
1046
1047func (h *Handle) Compare(w http.ResponseWriter, r *http.Request) {
1048 rev1 := chi.URLParam(r, "rev1")
1049 rev1, _ = url.PathUnescape(rev1)
1050
1051 rev2 := chi.URLParam(r, "rev2")
1052 rev2, _ = url.PathUnescape(rev2)
1053
1054 l := h.l.With("handler", "Compare", "r1", rev1, "r2", rev2)
1055
1056 path, _ := securejoin.SecureJoin(h.c.Repo.ScanPath, didPath(r))
1057 gr, err := git.PlainOpen(path)
1058 if err != nil {
1059 notFound(w)
1060 return
1061 }
1062
1063 commit1, err := gr.ResolveRevision(rev1)
1064 if err != nil {
1065 l.Error("error resolving revision 1", "msg", err.Error())
1066 writeError(w, fmt.Sprintf("error resolving revision %s", rev1), http.StatusBadRequest)
1067 return
1068 }
1069
1070 commit2, err := gr.ResolveRevision(rev2)
1071 if err != nil {
1072 l.Error("error resolving revision 2", "msg", err.Error())
1073 writeError(w, fmt.Sprintf("error resolving revision %s", rev2), http.StatusBadRequest)
1074 return
1075 }
1076
1077 rawPatch, formatPatch, err := gr.FormatPatch(commit1, commit2)
1078 if err != nil {
1079 l.Error("error comparing revisions", "msg", err.Error())
1080 writeError(w, "error comparing revisions", http.StatusBadRequest)
1081 return
1082 }
1083
1084 writeJSON(w, types.RepoFormatPatchResponse{
1085 Rev1: commit1.Hash.String(),
1086 Rev2: commit2.Hash.String(),
1087 FormatPatch: formatPatch,
1088 Patch: rawPatch,
1089 })
1090 return
1091}
1092
1093func (h *Handle) NewHiddenRef(w http.ResponseWriter, r *http.Request) {
1094 l := h.l.With("handler", "NewHiddenRef")
1095
1096 forkRef := chi.URLParam(r, "forkRef")
1097 forkRef, _ = url.PathUnescape(forkRef)
1098
1099 remoteRef := chi.URLParam(r, "remoteRef")
1100 remoteRef, _ = url.PathUnescape(remoteRef)
1101
1102 path, _ := securejoin.SecureJoin(h.c.Repo.ScanPath, didPath(r))
1103 gr, err := git.PlainOpen(path)
1104 if err != nil {
1105 notFound(w)
1106 return
1107 }
1108
1109 err = gr.TrackHiddenRemoteRef(forkRef, remoteRef)
1110 if err != nil {
1111 l.Error("error tracking hidden remote ref", "msg", err.Error())
1112 writeError(w, "error tracking hidden remote ref", http.StatusBadRequest)
1113 return
1114 }
1115
1116 w.WriteHeader(http.StatusNoContent)
1117 return
1118}
1119
1120func (h *Handle) AddMember(w http.ResponseWriter, r *http.Request) {
1121 l := h.l.With("handler", "AddMember")
1122
1123 data := struct {
1124 Did string `json:"did"`
1125 }{}
1126
1127 if err := json.NewDecoder(r.Body).Decode(&data); err != nil {
1128 writeError(w, "invalid request body", http.StatusBadRequest)
1129 return
1130 }
1131
1132 did := data.Did
1133
1134 if err := h.db.AddDid(did); err != nil {
1135 l.Error("adding did", "error", err.Error())
1136 writeError(w, err.Error(), http.StatusInternalServerError)
1137 return
1138 }
1139 h.jc.AddDid(did)
1140
1141 if err := h.e.AddKnotMember(ThisServer, did); err != nil {
1142 l.Error("adding member", "error", err.Error())
1143 writeError(w, err.Error(), http.StatusInternalServerError)
1144 return
1145 }
1146
1147 if err := h.fetchAndAddKeys(r.Context(), did); err != nil {
1148 l.Error("fetching and adding keys", "error", err.Error())
1149 writeError(w, err.Error(), http.StatusInternalServerError)
1150 return
1151 }
1152
1153 w.WriteHeader(http.StatusNoContent)
1154}
1155
1156func (h *Handle) AddRepoCollaborator(w http.ResponseWriter, r *http.Request) {
1157 l := h.l.With("handler", "AddRepoCollaborator")
1158
1159 data := struct {
1160 Did string `json:"did"`
1161 }{}
1162
1163 ownerDid := chi.URLParam(r, "did")
1164 repo := chi.URLParam(r, "name")
1165
1166 if err := json.NewDecoder(r.Body).Decode(&data); err != nil {
1167 writeError(w, "invalid request body", http.StatusBadRequest)
1168 return
1169 }
1170
1171 if err := h.db.AddDid(data.Did); err != nil {
1172 l.Error("adding did", "error", err.Error())
1173 writeError(w, err.Error(), http.StatusInternalServerError)
1174 return
1175 }
1176 h.jc.AddDid(data.Did)
1177
1178 repoName, _ := securejoin.SecureJoin(ownerDid, repo)
1179 if err := h.e.AddCollaborator(data.Did, ThisServer, repoName); err != nil {
1180 l.Error("adding repo collaborator", "error", err.Error())
1181 writeError(w, err.Error(), http.StatusInternalServerError)
1182 return
1183 }
1184
1185 if err := h.fetchAndAddKeys(r.Context(), data.Did); err != nil {
1186 l.Error("fetching and adding keys", "error", err.Error())
1187 writeError(w, err.Error(), http.StatusInternalServerError)
1188 return
1189 }
1190
1191 w.WriteHeader(http.StatusNoContent)
1192}
1193
1194func (h *Handle) DefaultBranch(w http.ResponseWriter, r *http.Request) {
1195 l := h.l.With("handler", "DefaultBranch")
1196 path, _ := securejoin.SecureJoin(h.c.Repo.ScanPath, didPath(r))
1197
1198 gr, err := git.Open(path, "")
1199 if err != nil {
1200 notFound(w)
1201 return
1202 }
1203
1204 branch, err := gr.FindMainBranch()
1205 if err != nil {
1206 writeError(w, err.Error(), http.StatusInternalServerError)
1207 l.Error("getting default branch", "error", err.Error())
1208 return
1209 }
1210
1211 writeJSON(w, types.RepoDefaultBranchResponse{
1212 Branch: branch,
1213 })
1214}
1215
1216func (h *Handle) SetDefaultBranch(w http.ResponseWriter, r *http.Request) {
1217 l := h.l.With("handler", "SetDefaultBranch")
1218 path, _ := securejoin.SecureJoin(h.c.Repo.ScanPath, didPath(r))
1219
1220 data := struct {
1221 Branch string `json:"branch"`
1222 }{}
1223
1224 if err := json.NewDecoder(r.Body).Decode(&data); err != nil {
1225 writeError(w, err.Error(), http.StatusBadRequest)
1226 return
1227 }
1228
1229 gr, err := git.PlainOpen(path)
1230 if err != nil {
1231 notFound(w)
1232 return
1233 }
1234
1235 err = gr.SetDefaultBranch(data.Branch)
1236 if err != nil {
1237 writeError(w, err.Error(), http.StatusInternalServerError)
1238 l.Error("setting default branch", "error", err.Error())
1239 return
1240 }
1241
1242 w.WriteHeader(http.StatusNoContent)
1243}
1244
1245func (h *Handle) Init(w http.ResponseWriter, r *http.Request) {
1246 l := h.l.With("handler", "Init")
1247
1248 if h.knotInitialized {
1249 writeError(w, "knot already initialized", http.StatusConflict)
1250 return
1251 }
1252
1253 data := struct {
1254 Did string `json:"did"`
1255 }{}
1256
1257 if err := json.NewDecoder(r.Body).Decode(&data); err != nil {
1258 l.Error("failed to decode request body", "error", err.Error())
1259 writeError(w, "invalid request body", http.StatusBadRequest)
1260 return
1261 }
1262
1263 if data.Did == "" {
1264 l.Error("empty DID in request", "did", data.Did)
1265 writeError(w, "did is empty", http.StatusBadRequest)
1266 return
1267 }
1268
1269 if err := h.db.AddDid(data.Did); err != nil {
1270 l.Error("failed to add DID", "error", err.Error())
1271 writeError(w, err.Error(), http.StatusInternalServerError)
1272 return
1273 }
1274 h.jc.AddDid(data.Did)
1275
1276 if err := h.e.AddKnotOwner(ThisServer, data.Did); err != nil {
1277 l.Error("adding owner", "error", err.Error())
1278 writeError(w, err.Error(), http.StatusInternalServerError)
1279 return
1280 }
1281
1282 if err := h.fetchAndAddKeys(r.Context(), data.Did); err != nil {
1283 l.Error("fetching and adding keys", "error", err.Error())
1284 writeError(w, err.Error(), http.StatusInternalServerError)
1285 return
1286 }
1287
1288 close(h.init)
1289
1290 mac := hmac.New(sha256.New, []byte(h.c.Server.Secret))
1291 mac.Write([]byte("ok"))
1292 w.Header().Add("X-Signature", hex.EncodeToString(mac.Sum(nil)))
1293
1294 w.WriteHeader(http.StatusNoContent)
1295}
1296
1297func (h *Handle) Health(w http.ResponseWriter, r *http.Request) {
1298 w.Write([]byte("ok"))
1299}
1300
1301func validateRepoName(name string) error {
1302 // check for path traversal attempts
1303 if name == "." || name == ".." ||
1304 strings.Contains(name, "/") || strings.Contains(name, "\\") {
1305 return fmt.Errorf("Repository name contains invalid path characters")
1306 }
1307
1308 // check for sequences that could be used for traversal when normalized
1309 if strings.Contains(name, "./") || strings.Contains(name, "../") ||
1310 strings.HasPrefix(name, ".") || strings.HasSuffix(name, ".") {
1311 return fmt.Errorf("Repository name contains invalid path sequence")
1312 }
1313
1314 // then continue with character validation
1315 for _, char := range name {
1316 if !((char >= 'a' && char <= 'z') ||
1317 (char >= 'A' && char <= 'Z') ||
1318 (char >= '0' && char <= '9') ||
1319 char == '-' || char == '_' || char == '.') {
1320 return fmt.Errorf("Repository name can only contain alphanumeric characters, periods, hyphens, and underscores")
1321 }
1322 }
1323
1324 // additional check to prevent multiple sequential dots
1325 if strings.Contains(name, "..") {
1326 return fmt.Errorf("Repository name cannot contain sequential dots")
1327 }
1328
1329 // if all checks pass
1330 return nil
1331}