images.go 33.8 KB
Newer Older
1
2
3
package server

import (
4
	"bufio"
5
	"bytes"
6
	"context"
7
8
9
10
	"crypto/sha256"
	"encoding/json"
	"errors"
	"fmt"
11
	"html/template"
12
13
14
15
	"io"
	"log"
	"net/http"
	"os"
Michael Yang's avatar
Michael Yang committed
16
	"path"
17
	"path/filepath"
Michael Yang's avatar
Michael Yang committed
18
	"reflect"
19
20
21
22
	"strconv"
	"strings"

	"github.com/jmorganca/ollama/api"
23
	"github.com/jmorganca/ollama/llm"
24
	"github.com/jmorganca/ollama/parser"
25
	"github.com/jmorganca/ollama/vector"
26
27
)

28
29
const MaxRetries = 3

30
31
32
33
type RegistryOptions struct {
	Insecure bool
	Username string
	Password string
Patrick Devine's avatar
Patrick Devine committed
34
	Token    string
35
36
}

37
type Model struct {
38
39
40
41
42
43
44
45
	Name         string `json:"name"`
	ModelPath    string
	AdapterPaths []string
	Template     string
	System       string
	Digest       string
	Options      map[string]interface{}
	Embeddings   []vector.Embedding
46
47
}

Bruce MacDonald's avatar
Bruce MacDonald committed
48
func (m *Model) Prompt(request api.GenerateRequest, embedding string) (string, error) {
49
50
51
52
53
54
	t := m.Template
	if request.Template != "" {
		t = request.Template
	}

	tmpl, err := template.New("").Parse(t)
55
56
57
58
59
	if err != nil {
		return "", err
	}

	var vars struct {
Michael Yang's avatar
Michael Yang committed
60
		First  bool
61
62
		System string
		Prompt string
63
		Embed  string
64
65
66

		// deprecated: versions <= 0.0.7 used this to omit the system prompt
		Context []int
67
68
	}

Michael Yang's avatar
Michael Yang committed
69
	vars.First = len(request.Context) == 0
70
71
	vars.System = m.System
	vars.Prompt = request.Prompt
Michael Yang's avatar
Michael Yang committed
72
	vars.Context = request.Context
Bruce MacDonald's avatar
Bruce MacDonald committed
73
	vars.Embed = embedding
74

75
76
77
78
	if request.System != "" {
		vars.System = request.System
	}

79
80
81
82
83
84
85
86
	var sb strings.Builder
	if err := tmpl.Execute(&sb, vars); err != nil {
		return "", err
	}

	return sb.String(), nil
}

87
88
89
90
91
92
93
94
95
96
97
type ManifestV2 struct {
	SchemaVersion int      `json:"schemaVersion"`
	MediaType     string   `json:"mediaType"`
	Config        Layer    `json:"config"`
	Layers        []*Layer `json:"layers"`
}

type Layer struct {
	MediaType string `json:"mediaType"`
	Digest    string `json:"digest"`
	Size      int    `json:"size"`
Michael Yang's avatar
Michael Yang committed
98
	From      string `json:"from,omitempty"`
99
100
}

Michael Yang's avatar
Michael Yang committed
101
type LayerReader struct {
102
	Layer
Michael Yang's avatar
Michael Yang committed
103
	io.Reader
104
105
106
}

type ConfigV2 struct {
107
108
109
110
111
112
	ModelFamily llm.ModelFamily `json:"model_family"`
	ModelType   llm.ModelType   `json:"model_type"`
	FileType    llm.FileType    `json:"file_type"`
	RootFS      RootFS          `json:"rootfs"`

	// required by spec
113
114
115
116
117
118
119
120
121
	Architecture string `json:"architecture"`
	OS           string `json:"os"`
}

type RootFS struct {
	Type    string   `json:"type"`
	DiffIDs []string `json:"diff_ids"`
}

Patrick Devine's avatar
Patrick Devine committed
122
123
124
125
126
127
128
129
130
func (m *ManifestV2) GetTotalSize() int {
	var total int
	for _, layer := range m.Layers {
		total += layer.Size
	}
	total += m.Config.Size
	return total
}

Patrick Devine's avatar
Patrick Devine committed
131
132
func GetManifest(mp ModelPath) (*ManifestV2, error) {
	fp, err := mp.GetManifestPath(false)
133
134
135
	if err != nil {
		return nil, err
	}
136

137
138
	if _, err = os.Stat(fp); err != nil {
		return nil, err
139
140
141
142
	}

	var manifest *ManifestV2

143
	bts, err := os.ReadFile(fp)
144
145
146
147
	if err != nil {
		return nil, fmt.Errorf("couldn't open file '%s'", fp)
	}

148
	if err := json.Unmarshal(bts, &manifest); err != nil {
149
150
151
152
153
154
155
		return nil, err
	}

	return manifest, nil
}

func GetModel(name string) (*Model, error) {
Patrick Devine's avatar
Patrick Devine committed
156
157
158
	mp := ParseModelPath(name)

	manifest, err := GetManifest(mp)
159
160
161
162
163
	if err != nil {
		return nil, err
	}

	model := &Model{
164
		Name:   mp.GetFullTagname(),
Jeffrey Morgan's avatar
Jeffrey Morgan committed
165
		Digest: manifest.Config.Digest,
166
167
168
	}

	for _, layer := range manifest.Layers {
Patrick Devine's avatar
Patrick Devine committed
169
		filename, err := GetBlobsPath(layer.Digest)
170
171
172
173
		if err != nil {
			return nil, err
		}

174
175
176
		switch layer.MediaType {
		case "application/vnd.ollama.image.model":
			model.ModelPath = filename
177
178
179
180
181
182
183
184
185
186
		case "application/vnd.ollama.image.embed":
			file, err := os.Open(filename)
			if err != nil {
				return nil, fmt.Errorf("failed to open file: %s", filename)
			}
			defer file.Close()

			if err = json.NewDecoder(file).Decode(&model.Embeddings); err != nil {
				return nil, err
			}
187
188
		case "application/vnd.ollama.image.adapter":
			model.AdapterPaths = append(model.AdapterPaths, filename)
189
190
191
192
193
194
195
196
197
		case "application/vnd.ollama.image.template":
			bts, err := os.ReadFile(filename)
			if err != nil {
				return nil, err
			}

			model.Template = string(bts)
		case "application/vnd.ollama.image.system":
			bts, err := os.ReadFile(filename)
198
199
200
			if err != nil {
				return nil, err
			}
201
202

			model.System = string(bts)
203
204
205
206
207
208
209
		case "application/vnd.ollama.image.prompt":
			bts, err := os.ReadFile(filename)
			if err != nil {
				return nil, err
			}

			model.Template = string(bts)
210
		case "application/vnd.ollama.image.params":
Michael Yang's avatar
Michael Yang committed
211
212
213
214
215
			params, err := os.Open(filename)
			if err != nil {
				return nil, err
			}
			defer params.Close()
216

217
			// parse model options parameters into a map so that we can see which fields have been specified explicitly
218
			if err = json.NewDecoder(params).Decode(&model.Options); err != nil {
219
220
				return nil, err
			}
221
222
223
224
225
226
		}
	}

	return model, nil
}

227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
func filenameWithPath(path, f string) (string, error) {
	// if filePath starts with ~/, replace it with the user's home directory.
	if strings.HasPrefix(f, "~/") {
		parts := strings.Split(f, "/")
		home, err := os.UserHomeDir()
		if err != nil {
			return "", fmt.Errorf("failed to open file: %v", err)
		}

		f = filepath.Join(home, filepath.Join(parts[1:]...))
	}

	// if filePath is not an absolute path, make it relative to the modelfile path
	if !filepath.IsAbs(f) {
		f = filepath.Join(filepath.Dir(path), f)
	}

	return f, nil
}

247
func CreateModel(ctx context.Context, name string, path string, fn func(resp api.ProgressResponse)) error {
248
249
	mf, err := os.Open(path)
	if err != nil {
250
		fn(api.ProgressResponse{Status: fmt.Sprintf("couldn't open modelfile '%s'", path)})
251
		return fmt.Errorf("failed to open file: %w", err)
252
	}
253
	defer mf.Close()
254

255
	fn(api.ProgressResponse{Status: "parsing modelfile"})
256
257
258
259
260
	commands, err := parser.Parse(mf)
	if err != nil {
		return err
	}

261
262
263
264
265
	config := ConfigV2{
		Architecture: "amd64",
		OS:           "linux",
	}

Michael Yang's avatar
Michael Yang committed
266
	var layers []*LayerReader
267
	params := make(map[string][]string)
268
	embed := EmbeddingParams{fn: fn}
269
	for _, c := range commands {
270
		log.Printf("[%s] - %s\n", c.Name, c.Args)
271
272
		switch c.Name {
		case "model":
273
			fn(api.ProgressResponse{Status: "looking for model"})
274
			embed.model = c.Args
Michael Yang's avatar
Michael Yang committed
275
276
			mp := ParseModelPath(c.Args)
			mf, err := GetManifest(mp)
277
			if err != nil {
278
279
280
				modelFile, err := filenameWithPath(path, c.Args)
				if err != nil {
					return err
281
				}
282
				if _, err := os.Stat(modelFile); err != nil {
283
284
285
					// the model file does not exist, try pulling it
					if errors.Is(err, os.ErrNotExist) {
						fn(api.ProgressResponse{Status: "pulling model file"})
286
						if err := PullModel(ctx, c.Args, &RegistryOptions{}, fn); err != nil {
287
288
							return err
						}
289
						mf, err = GetManifest(ParseModelPath(c.Args))
290
291
292
293
294
295
296
						if err != nil {
							return fmt.Errorf("failed to open file after pull: %v", err)
						}
					} else {
						return err
					}
				} else {
297
					embed.model = modelFile
298
299
					// create a model from this specified file
					fn(api.ProgressResponse{Status: "creating model layer"})
300
					file, err := os.Open(modelFile)
301
302
303
304
305
					if err != nil {
						return fmt.Errorf("failed to open file: %v", err)
					}
					defer file.Close()

306
307
308
309
310
311
312
313
314
315
316
317
					ggml, err := llm.DecodeGGML(file, llm.ModelFamilyLlama)
					if err != nil {
						return err
					}

					config.ModelFamily = ggml.ModelFamily
					config.ModelType = ggml.ModelType
					config.FileType = ggml.FileType

					// reset the file
					file.Seek(0, io.SeekStart)

318
319
320
321
322
323
					l, err := CreateLayer(file)
					if err != nil {
						return fmt.Errorf("failed to create layer: %v", err)
					}
					l.MediaType = "application/vnd.ollama.image.model"
					layers = append(layers, l)
324
				}
325
			}
326

327
			if mf != nil {
328
329
330
331
332
333
				log.Printf("manifest = %#v", mf)
				for _, l := range mf.Layers {
					newLayer, err := GetLayerWithBufferFromLayer(l)
					if err != nil {
						return err
					}
Michael Yang's avatar
Michael Yang committed
334
					newLayer.From = mp.GetNamespaceRepository()
335
336
337
					layers = append(layers, newLayer)
				}
			}
338
339
		case "embed":
			embedFilePath, err := filenameWithPath(path, c.Args)
Michael Yang's avatar
Michael Yang committed
340
341
342
			if err != nil {
				return err
			}
343
			embed.files = append(embed.files, embedFilePath)
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
		case "adapter":
			fn(api.ProgressResponse{Status: fmt.Sprintf("creating model %s layer", c.Name)})

			fp := c.Args
			if strings.HasPrefix(fp, "~/") {
				parts := strings.Split(fp, "/")
				home, err := os.UserHomeDir()
				if err != nil {
					return fmt.Errorf("failed to open file: %v", err)
				}

				fp = filepath.Join(home, filepath.Join(parts[1:]...))
			}

			// If filePath is not an absolute path, make it relative to the modelfile path
			if !filepath.IsAbs(fp) {
				fp = filepath.Join(filepath.Dir(path), fp)
			}

			// create a model from this specified file
			fn(api.ProgressResponse{Status: "creating model layer"})

			file, err := os.Open(fp)
			if err != nil {
				return fmt.Errorf("failed to open file: %v", err)
			}
			defer file.Close()

			l, err := CreateLayer(file)
			if err != nil {
				return fmt.Errorf("failed to create layer: %v", err)
			}
			l.MediaType = "application/vnd.ollama.image.adapter"
			layers = append(layers, l)
Bruce MacDonald's avatar
Bruce MacDonald committed
378
379
380
381
382
383
384
385
386
387
388
389
		case "license":
			fn(api.ProgressResponse{Status: fmt.Sprintf("creating model %s layer", c.Name)})
			mediaType := fmt.Sprintf("application/vnd.ollama.image.%s", c.Name)

			layer, err := CreateLayer(strings.NewReader(c.Args))
			if err != nil {
				return err
			}

			layer.MediaType = mediaType
			layers = append(layers, layer)
		case "template", "system", "prompt":
390
			fn(api.ProgressResponse{Status: fmt.Sprintf("creating model %s layer", c.Name)})
391
			// remove the layer if one exists
392
393
			mediaType := fmt.Sprintf("application/vnd.ollama.image.%s", c.Name)
			layers = removeLayerFromLayers(layers, mediaType)
394

395
			layer, err := CreateLayer(strings.NewReader(c.Args))
396
			if err != nil {
397
				return err
398
			}
399
400
401

			layer.MediaType = mediaType
			layers = append(layers, layer)
402
		default:
403
404
			// runtime parameters, build a list of args for each parameter to allow multiple values to be specified (ex: multiple stop tokens)
			params[c.Name] = append(params[c.Name], c.Args)
405
406
407
408
		}
	}

	// Create a single layer for the parameters
Michael Yang's avatar
Michael Yang committed
409
	if len(params) > 0 {
410
		fn(api.ProgressResponse{Status: "creating parameter layer"})
411
		layers = removeLayerFromLayers(layers, "application/vnd.ollama.image.params")
412
		formattedParams, err := formatParams(params)
413
414
415
		if err != nil {
			return fmt.Errorf("couldn't create params json: %v", err)
		}
416
417
418
419
420
421
422

		bts, err := json.Marshal(formattedParams)
		if err != nil {
			return err
		}

		l, err := CreateLayer(bytes.NewReader(bts))
423
424
425
426
427
		if err != nil {
			return fmt.Errorf("failed to create layer: %v", err)
		}
		l.MediaType = "application/vnd.ollama.image.params"
		layers = append(layers, l)
428
429

		// apply these parameters to the embedding options, in case embeddings need to be generated using this model
430
		embed.opts = formattedParams
431
432
	}

433
434
435
436
437
438
439
	// generate the embedding layers
	embeddingLayers, err := embeddingLayers(embed)
	if err != nil {
		return err
	}
	layers = append(layers, embeddingLayers...)

440
441
442
443
444
445
446
447
448
449
450
	digests, err := getLayerDigests(layers)
	if err != nil {
		return err
	}

	var manifestLayers []*Layer
	for _, l := range layers {
		manifestLayers = append(manifestLayers, &l.Layer)
	}

	// Create a layer for the config object
451
	fn(api.ProgressResponse{Status: "creating config layer"})
452
	cfg, err := createConfigLayer(config, digests)
453
454
455
456
457
	if err != nil {
		return err
	}
	layers = append(layers, cfg)

Michael Yang's avatar
Michael Yang committed
458
	if err := SaveLayers(layers, fn, false); err != nil {
459
460
461
462
		return err
	}

	// Create the manifest
463
	fn(api.ProgressResponse{Status: "writing manifest"})
464
465
466
467
468
	err = CreateManifest(name, cfg, manifestLayers)
	if err != nil {
		return err
	}

469
	fn(api.ProgressResponse{Status: "success"})
470
471
472
	return nil
}

473
474
type EmbeddingParams struct {
	model string
475
	opts  map[string]interface{}
476
477
478
479
480
481
482
483
	files []string // paths to files to embed
	fn    func(resp api.ProgressResponse)
}

// embeddingLayers loads the associated LLM and generates the embeddings to be stored from an input file
func embeddingLayers(e EmbeddingParams) ([]*LayerReader, error) {
	layers := []*LayerReader{}
	if len(e.files) > 0 {
484
485
486
487
488
		// check if the model is a file path or a model name
		model, err := GetModel(e.model)
		if err != nil {
			if !strings.Contains(err.Error(), "couldn't open file") {
				return nil, fmt.Errorf("unexpected error opening model to generate embeddings: %v", err)
489
			}
490
491
			// the model may be a file path, create a model from this file
			model = &Model{ModelPath: e.model}
492
493
		}

494
		if err := load(model, e.opts, defaultSessionDuration); err != nil {
495
496
497
			return nil, fmt.Errorf("load model to generate embeddings: %v", err)
		}

498
		// this will be used to check if we already have embeddings for a file
499
		modelInfo, err := os.Stat(model.ModelPath)
500
		if err != nil {
Bruce MacDonald's avatar
Bruce MacDonald committed
501
			return nil, fmt.Errorf("failed to get model file info: %v", err)
502
503
		}

Bruce MacDonald's avatar
Bruce MacDonald committed
504
505
506
		addedFiles := make(map[string]bool) // keep track of files that have already been added
		for _, filePattern := range e.files {
			matchingFiles, err := filepath.Glob(filePattern)
507
			if err != nil {
Bruce MacDonald's avatar
Bruce MacDonald committed
508
				return nil, fmt.Errorf("could not find files with pattern %s: %w", filePattern, err)
509
510
			}

Bruce MacDonald's avatar
Bruce MacDonald committed
511
512
			for _, filePath := range matchingFiles {
				if addedFiles[filePath] {
513
514
					continue
				}
Bruce MacDonald's avatar
Bruce MacDonald committed
515
				addedFiles[filePath] = true
Bruce MacDonald's avatar
Bruce MacDonald committed
516
				// check if we already have embeddings for this file path
517
				layerIdentifier := fmt.Sprintf("%s:%s:%s:%d", filePath, e.model, modelInfo.ModTime().Format("2006-01-02 15:04:05"), modelInfo.Size())
Bruce MacDonald's avatar
Bruce MacDonald committed
518
519
520
521
522
523
				digest, _ := GetSHA256Digest(strings.NewReader(layerIdentifier))
				existing, err := existingFileEmbeddings(digest)
				if err != nil {
					return nil, fmt.Errorf("failed to check existing embeddings for file %s: %v", filePath, err)
				}

Bruce MacDonald's avatar
Bruce MacDonald committed
524
525
				// TODO: check file type
				f, err := os.Open(filePath)
526
				if err != nil {
Bruce MacDonald's avatar
Bruce MacDonald committed
527
					return nil, fmt.Errorf("could not open embed file: %w", err)
528
				}
Bruce MacDonald's avatar
Bruce MacDonald committed
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
				scanner := bufio.NewScanner(f)
				scanner.Split(bufio.ScanLines)

				data := []string{}
				for scanner.Scan() {
					data = append(data, scanner.Text())
				}
				f.Close()

				// the digest of the file is set here so that the client knows a new operation is in progress
				fileDigest, _ := GetSHA256Digest(bytes.NewReader([]byte(filePath)))

				embeddings := []vector.Embedding{}
				for i, d := range data {
					if strings.TrimSpace(d) == "" {
						continue
					}
					e.fn(api.ProgressResponse{
						Status:    fmt.Sprintf("creating embeddings for file %s", filePath),
						Digest:    fileDigest,
						Total:     len(data) - 1,
						Completed: i,
					})
Bruce MacDonald's avatar
Bruce MacDonald committed
552
553
554
555
556
					if len(existing[d]) > 0 {
						// already have an embedding for this line
						embeddings = append(embeddings, vector.Embedding{Data: d, Vector: existing[d]})
						continue
					}
557
					embed, err := loaded.llm.Embedding(d)
Bruce MacDonald's avatar
Bruce MacDonald committed
558
					if err != nil {
559
560
						log.Printf("failed to generate embedding for '%s' line %d: %v", filePath, i+1, err)
						continue
Bruce MacDonald's avatar
Bruce MacDonald committed
561
562
					}
					embeddings = append(embeddings, vector.Embedding{Data: d, Vector: embed})
563
564
				}

Bruce MacDonald's avatar
Bruce MacDonald committed
565
566
567
568
569
				b, err := json.Marshal(embeddings)
				if err != nil {
					return nil, fmt.Errorf("failed to encode embeddings: %w", err)
				}
				r := bytes.NewReader(b)
570

Bruce MacDonald's avatar
Bruce MacDonald committed
571
572
573
574
				layer := &LayerReader{
					Layer: Layer{
						MediaType: "application/vnd.ollama.image.embed",
						Digest:    digest,
Bruce MacDonald's avatar
Bruce MacDonald committed
575
						Size:      r.Len(),
Bruce MacDonald's avatar
Bruce MacDonald committed
576
577
578
					},
					Reader: r,
				}
579

Bruce MacDonald's avatar
Bruce MacDonald committed
580
581
				layers = append(layers, layer)
			}
582
583
584
585
586
		}
	}
	return layers, nil
}

Bruce MacDonald's avatar
Bruce MacDonald committed
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
// existingFileEmbeddings checks if we already have embeddings for a file and loads them into a look-up map
func existingFileEmbeddings(digest string) (map[string][]float64, error) {
	path, err := GetBlobsPath(digest)
	if err != nil {
		return nil, fmt.Errorf("embeddings blobs path: %w", err)
	}
	existingFileEmbeddings := make(map[string][]float64)
	if _, err := os.Stat(path); err == nil {
		// already have some embeddings for this file, load embeddings previously generated
		file, err := os.Open(path)
		if err != nil {
			return nil, fmt.Errorf("failed to open existing embedding file: %s", err)
		}
		defer file.Close()

		existing := []vector.Embedding{}
		if err = json.NewDecoder(file).Decode(&existing); err != nil {
			return nil, err
		}
		for _, e := range existing {
			existingFileEmbeddings[e.Data] = e.Vector
		}
	}
	return existingFileEmbeddings, nil
}

Michael Yang's avatar
Michael Yang committed
613
func removeLayerFromLayers(layers []*LayerReader, mediaType string) []*LayerReader {
614
615
616
617
618
619
620
621
622
623
	j := 0
	for _, l := range layers {
		if l.MediaType != mediaType {
			layers[j] = l
			j++
		}
	}
	return layers[:j]
}

624
func SaveLayers(layers []*LayerReader, fn func(resp api.ProgressResponse), force bool) error {
625
626
	// Write each of the layers to disk
	for _, layer := range layers {
Patrick Devine's avatar
Patrick Devine committed
627
		fp, err := GetBlobsPath(layer.Digest)
628
629
630
		if err != nil {
			return err
		}
631
632

		_, err = os.Stat(fp)
Bruce MacDonald's avatar
Bruce MacDonald committed
633
634
		// note: embed layers are always written since their digest doesnt indicate anything about the contents
		if os.IsNotExist(err) || force || layer.MediaType == "application/vnd.ollama.image.embed" {
635
636
			fn(api.ProgressResponse{Status: fmt.Sprintf("writing layer %s", layer.Digest)})

637
638
639
640
641
642
643
			out, err := os.Create(fp)
			if err != nil {
				log.Printf("couldn't create %s", fp)
				return err
			}
			defer out.Close()

Michael Yang's avatar
Michael Yang committed
644
			if _, err = io.Copy(out, layer.Reader); err != nil {
645
646
				return err
			}
Michael Yang's avatar
Michael Yang committed
647

648
		} else {
649
			fn(api.ProgressResponse{Status: fmt.Sprintf("using already created layer %s", layer.Digest)})
650
651
652
653
654
655
		}
	}

	return nil
}

Michael Yang's avatar
Michael Yang committed
656
func CreateManifest(name string, cfg *LayerReader, layers []*Layer) error {
Patrick Devine's avatar
Patrick Devine committed
657
658
	mp := ParseModelPath(name)

659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
	manifest := ManifestV2{
		SchemaVersion: 2,
		MediaType:     "application/vnd.docker.distribution.manifest.v2+json",
		Config: Layer{
			MediaType: cfg.MediaType,
			Size:      cfg.Size,
			Digest:    cfg.Digest,
		},
		Layers: layers,
	}

	manifestJSON, err := json.Marshal(manifest)
	if err != nil {
		return err
	}

Patrick Devine's avatar
Patrick Devine committed
675
	fp, err := mp.GetManifestPath(true)
676
677
678
	if err != nil {
		return err
	}
679
	return os.WriteFile(fp, manifestJSON, 0o644)
680
681
}

Michael Yang's avatar
Michael Yang committed
682
func GetLayerWithBufferFromLayer(layer *Layer) (*LayerReader, error) {
Patrick Devine's avatar
Patrick Devine committed
683
	fp, err := GetBlobsPath(layer.Digest)
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
	if err != nil {
		return nil, err
	}

	file, err := os.Open(fp)
	if err != nil {
		return nil, fmt.Errorf("could not open blob: %w", err)
	}
	defer file.Close()

	newLayer, err := CreateLayer(file)
	if err != nil {
		return nil, err
	}
	newLayer.MediaType = layer.MediaType
	return newLayer, nil
}

702
703
// formatParams converts specified parameter options to their correct types
func formatParams(params map[string][]string) (map[string]interface{}, error) {
704
705
706
	opts := api.Options{}
	valueOpts := reflect.ValueOf(&opts).Elem() // names of the fields in the options struct
	typeOpts := reflect.TypeOf(opts)           // types of the fields in the options struct
Michael Yang's avatar
Michael Yang committed
707

708
	// build map of json struct tags to their types
Michael Yang's avatar
Michael Yang committed
709
710
711
712
713
714
715
716
	jsonOpts := make(map[string]reflect.StructField)
	for _, field := range reflect.VisibleFields(typeOpts) {
		jsonTag := strings.Split(field.Tag.Get("json"), ",")[0]
		if jsonTag != "" {
			jsonOpts[jsonTag] = field
		}
	}

717
	out := make(map[string]interface{})
Michael Yang's avatar
Michael Yang committed
718
	// iterate params and set values based on json struct tags
719
	for key, vals := range params {
Michael Yang's avatar
Michael Yang committed
720
721
722
723
724
		if opt, ok := jsonOpts[key]; ok {
			field := valueOpts.FieldByName(opt.Name)
			if field.IsValid() && field.CanSet() {
				switch field.Kind() {
				case reflect.Float32:
725
					floatVal, err := strconv.ParseFloat(vals[0], 32)
Michael Yang's avatar
Michael Yang committed
726
					if err != nil {
727
						return nil, fmt.Errorf("invalid float value %s", vals)
Michael Yang's avatar
Michael Yang committed
728
729
					}

730
					out[key] = floatVal
Michael Yang's avatar
Michael Yang committed
731
				case reflect.Int:
732
					intVal, err := strconv.ParseInt(vals[0], 10, 0)
Michael Yang's avatar
Michael Yang committed
733
					if err != nil {
734
						return nil, fmt.Errorf("invalid int value %s", vals)
Michael Yang's avatar
Michael Yang committed
735
736
					}

737
					out[key] = intVal
Michael Yang's avatar
Michael Yang committed
738
				case reflect.Bool:
739
					boolVal, err := strconv.ParseBool(vals[0])
Michael Yang's avatar
Michael Yang committed
740
					if err != nil {
741
						return nil, fmt.Errorf("invalid bool value %s", vals)
Michael Yang's avatar
Michael Yang committed
742
743
					}

744
					out[key] = boolVal
Michael Yang's avatar
Michael Yang committed
745
				case reflect.String:
746
					out[key] = vals[0]
747
				case reflect.Slice:
748
749
					// TODO: only string slices are supported right now
					out[key] = vals
Michael Yang's avatar
Michael Yang committed
750
751
752
753
754
755
756
				default:
					return nil, fmt.Errorf("unknown type %s for %s", field.Kind(), key)
				}
			}
		}
	}

757
	return out, nil
758
759
}

Michael Yang's avatar
Michael Yang committed
760
func getLayerDigests(layers []*LayerReader) ([]string, error) {
761
762
763
764
765
766
767
768
769
770
771
	var digests []string
	for _, l := range layers {
		if l.Digest == "" {
			return nil, fmt.Errorf("layer is missing a digest")
		}
		digests = append(digests, l.Digest)
	}
	return digests, nil
}

// CreateLayer creates a Layer object from a given file
Michael Yang's avatar
Michael Yang committed
772
773
func CreateLayer(f io.ReadSeeker) (*LayerReader, error) {
	digest, size := GetSHA256Digest(f)
774
	f.Seek(0, io.SeekStart)
775

Michael Yang's avatar
Michael Yang committed
776
	layer := &LayerReader{
777
778
779
780
781
		Layer: Layer{
			MediaType: "application/vnd.docker.image.rootfs.diff.tar",
			Digest:    digest,
			Size:      size,
		},
Michael Yang's avatar
Michael Yang committed
782
		Reader: f,
783
784
785
786
787
	}

	return layer, nil
}

Patrick Devine's avatar
Patrick Devine committed
788
789
790
791
792
793
794
795
796
797
798
func CopyModel(src, dest string) error {
	srcPath, err := ParseModelPath(src).GetManifestPath(false)
	if err != nil {
		return err
	}
	destPath, err := ParseModelPath(dest).GetManifestPath(true)
	if err != nil {
		return err
	}

	// copy the file
Michael Yang's avatar
Michael Yang committed
799
	input, err := os.ReadFile(srcPath)
Patrick Devine's avatar
Patrick Devine committed
800
801
802
803
804
	if err != nil {
		fmt.Println("Error reading file:", err)
		return err
	}

Michael Yang's avatar
Michael Yang committed
805
	err = os.WriteFile(destPath, input, 0o644)
Patrick Devine's avatar
Patrick Devine committed
806
807
808
809
810
811
812
813
	if err != nil {
		fmt.Println("Error reading file:", err)
		return err
	}

	return nil
}

814
func DeleteModel(name string) error {
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
	mp := ParseModelPath(name)

	manifest, err := GetManifest(mp)
	if err != nil {
		return err
	}
	deleteMap := make(map[string]bool)
	for _, layer := range manifest.Layers {
		deleteMap[layer.Digest] = true
	}
	deleteMap[manifest.Config.Digest] = true

	fp, err := GetManifestPath()
	if err != nil {
		return err
	}
	err = filepath.Walk(fp, func(path string, info os.FileInfo, err error) error {
		if err != nil {
			return err
		}
		if !info.IsDir() {
			path := path[len(fp)+1:]
			slashIndex := strings.LastIndex(path, "/")
			if slashIndex == -1 {
				return nil
			}
			tag := path[:slashIndex] + ":" + path[slashIndex+1:]
			fmp := ParseModelPath(tag)

			// skip the manifest we're trying to delete
			if mp.GetFullTagname() == fmp.GetFullTagname() {
				return nil
			}

			// save (i.e. delete from the deleteMap) any files used in other manifests
			manifest, err := GetManifest(fmp)
			if err != nil {
				log.Printf("skipping file: %s", fp)
				return nil
			}
			for _, layer := range manifest.Layers {
				delete(deleteMap, layer.Digest)
			}
			delete(deleteMap, manifest.Config.Digest)
		}
		return nil
	})
Michael Yang's avatar
Michael Yang committed
862
863
864
	if err != nil {
		return err
	}
865
866
867
868

	// only delete the files which are still in the deleteMap
	for k, v := range deleteMap {
		if v {
869
			fp, err := GetBlobsPath(k)
870
			if err != nil {
871
872
873
874
875
				log.Printf("couldn't get file path for '%s': %v", k, err)
				continue
			}
			if err := os.Remove(fp); err != nil {
				log.Printf("couldn't remove file '%s': %v", fp, err)
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
				continue
			}
		}
	}

	fp, err = mp.GetManifestPath(false)
	if err != nil {
		return err
	}
	err = os.Remove(fp)
	if err != nil {
		log.Printf("couldn't remove manifest file '%s': %v", fp, err)
		return err
	}

	return nil
}

894
func PushModel(ctx context.Context, name string, regOpts *RegistryOptions, fn func(api.ProgressResponse)) error {
Patrick Devine's avatar
Patrick Devine committed
895
896
	mp := ParseModelPath(name)

897
898
	fn(api.ProgressResponse{Status: "retrieving manifest"})

Patrick Devine's avatar
Patrick Devine committed
899
	manifest, err := GetManifest(mp)
900
	if err != nil {
901
		fn(api.ProgressResponse{Status: "couldn't retrieve manifest"})
902
903
904
905
		return err
	}

	var layers []*Layer
Jeffrey Morgan's avatar
Jeffrey Morgan committed
906
	layers = append(layers, manifest.Layers...)
907
908
909
	layers = append(layers, &manifest.Config)

	for _, layer := range layers {
910
		exists, err := checkBlobExistence(ctx, mp, layer.Digest, regOpts)
911
912
913
914
915
		if err != nil {
			return err
		}

		if exists {
916
917
918
			fn(api.ProgressResponse{
				Status:    "using existing layer",
				Digest:    layer.Digest,
919
920
				Total:     layer.Size,
				Completed: layer.Size,
921
			})
922
			log.Printf("Layer %s already exists", layer.Digest)
923
924
925
			continue
		}

926
		fn(api.ProgressResponse{
927
928
929
			Status: "starting upload",
			Digest: layer.Digest,
			Total:  layer.Size,
930
		})
931

Michael Yang's avatar
Michael Yang committed
932
		location, err := startUpload(ctx, mp, layer, regOpts)
933
934
935
936
937
		if err != nil {
			log.Printf("couldn't start upload: %v", err)
			return err
		}

Michael Yang's avatar
Michael Yang committed
938
939
940
941
942
943
944
945
946
947
948
949
		if strings.HasPrefix(path.Base(location), "sha256:") {
			layer.Digest = path.Base(location)
			fn(api.ProgressResponse{
				Status:    "using existing layer",
				Digest:    layer.Digest,
				Total:     layer.Size,
				Completed: layer.Size,
			})
			continue
		}

		if err := uploadBlobChunked(ctx, mp, location, layer, regOpts, fn); err != nil {
950
951
952
			log.Printf("error uploading blob: %v", err)
			return err
		}
953
954
	}

955
	fn(api.ProgressResponse{Status: "pushing manifest"})
956
	url := fmt.Sprintf("%s/v2/%s/manifests/%s", mp.Registry, mp.GetNamespaceRepository(), mp.Tag)
957
958
959
960
961
962
963
964
965
	headers := map[string]string{
		"Content-Type": "application/vnd.docker.distribution.manifest.v2+json",
	}

	manifestJSON, err := json.Marshal(manifest)
	if err != nil {
		return err
	}

966
	resp, err := makeRequest(ctx, "PUT", url, headers, bytes.NewReader(manifestJSON), regOpts)
967
968
969
970
971
972
973
974
	if err != nil {
		return err
	}
	defer resp.Body.Close()

	// Check for success: For a successful upload, the Docker registry will respond with a 201 Created
	if resp.StatusCode != http.StatusCreated {
		body, _ := io.ReadAll(resp.Body)
975
		return fmt.Errorf("on push registry responded with code %d: %v", resp.StatusCode, string(body))
976
977
	}

978
	fn(api.ProgressResponse{Status: "success"})
979
980
981
982

	return nil
}

983
func PullModel(ctx context.Context, name string, regOpts *RegistryOptions, fn func(api.ProgressResponse)) error {
Patrick Devine's avatar
Patrick Devine committed
984
	mp := ParseModelPath(name)
985

986
	fn(api.ProgressResponse{Status: "pulling manifest"})
987

988
	manifest, err := pullModelManifest(ctx, mp, regOpts)
989
	if err != nil {
990
		return fmt.Errorf("pull model manifest: %s", err)
991
992
993
	}

	var layers []*Layer
Bruce MacDonald's avatar
Bruce MacDonald committed
994
	layers = append(layers, manifest.Layers...)
995
996
997
	layers = append(layers, &manifest.Config)

	for _, layer := range layers {
998
		if err := downloadBlob(ctx, mp, layer.Digest, regOpts, fn); err != nil {
999
1000
1001
1002
			return err
		}
	}

Michael Yang's avatar
Michael Yang committed
1003
1004
1005
	fn(api.ProgressResponse{Status: "verifying sha256 digest"})
	for _, layer := range layers {
		if err := verifyBlob(layer.Digest); err != nil {
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
			if errors.Is(err, errDigestMismatch) {
				// something went wrong, delete the blob
				fp, err := GetBlobsPath(layer.Digest)
				if err != nil {
					return err
				}
				if err := os.Remove(fp); err != nil {
					// log this, but return the original error
					log.Printf("couldn't remove file with digest mismatch '%s': %v", fp, err)
				}
			}
Michael Yang's avatar
Michael Yang committed
1017
1018
1019
1020
			return err
		}
	}

1021
	fn(api.ProgressResponse{Status: "writing manifest"})
1022

1023
	manifestJSON, err := json.Marshal(manifest)
1024
1025
1026
1027
	if err != nil {
		return err
	}

Patrick Devine's avatar
Patrick Devine committed
1028
	fp, err := mp.GetManifestPath(true)
1029
1030
1031
1032
	if err != nil {
		return err
	}

Bruce MacDonald's avatar
Bruce MacDonald committed
1033
	err = os.WriteFile(fp, manifestJSON, 0o644)
1034
1035
1036
1037
1038
	if err != nil {
		log.Printf("couldn't write to %s", fp)
		return err
	}

1039
	fn(api.ProgressResponse{Status: "success"})
1040
1041
1042
1043

	return nil
}

1044
func pullModelManifest(ctx context.Context, mp ModelPath, regOpts *RegistryOptions) (*ManifestV2, error) {
1045
	url := fmt.Sprintf("%s/v2/%s/manifests/%s", mp.Registry, mp.GetNamespaceRepository(), mp.Tag)
1046
1047
1048
1049
	headers := map[string]string{
		"Accept": "application/vnd.docker.distribution.manifest.v2+json",
	}

1050
	resp, err := makeRequest(ctx, "GET", url, headers, nil, regOpts)
1051
1052
1053
1054
1055
1056
1057
1058
	if err != nil {
		log.Printf("couldn't get manifest: %v", err)
		return nil, err
	}
	defer resp.Body.Close()

	// Check for success: For a successful upload, the Docker registry will respond with a 201 Created
	if resp.StatusCode != http.StatusOK {
1059
		if resp.StatusCode == http.StatusNotFound {
Bruce MacDonald's avatar
Bruce MacDonald committed
1060
			return nil, fmt.Errorf("model not found")
1061
		}
1062
		body, _ := io.ReadAll(resp.Body)
1063
		return nil, fmt.Errorf("on pull registry responded with code %d: %s", resp.StatusCode, body)
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
	}

	var m *ManifestV2
	if err := json.NewDecoder(resp.Body).Decode(&m); err != nil {
		return nil, err
	}

	return m, err
}

1074
1075
1076
1077
func createConfigLayer(config ConfigV2, layers []string) (*LayerReader, error) {
	config.RootFS = RootFS{
		Type:    "layers",
		DiffIDs: layers,
1078
1079
1080
1081
1082
1083
1084
	}

	configJSON, err := json.Marshal(config)
	if err != nil {
		return nil, err
	}

1085
	digest, size := GetSHA256Digest(bytes.NewBuffer(configJSON))
1086

Michael Yang's avatar
Michael Yang committed
1087
	layer := &LayerReader{
1088
1089
1090
1091
1092
		Layer: Layer{
			MediaType: "application/vnd.docker.container.image.v1+json",
			Digest:    digest,
			Size:      size,
		},
1093
		Reader: bytes.NewBuffer(configJSON),
1094
1095
1096
1097
1098
	}
	return layer, nil
}

// GetSHA256Digest returns the SHA256 hash of a given buffer and returns it, and the size of buffer
Michael Yang's avatar
Michael Yang committed
1099
1100
1101
1102
1103
1104
1105
1106
func GetSHA256Digest(r io.Reader) (string, int) {
	h := sha256.New()
	n, err := io.Copy(h, r)
	if err != nil {
		log.Fatal(err)
	}

	return fmt.Sprintf("sha256:%x", h.Sum(nil)), int(n)
1107
1108
}

Michael Yang's avatar
Michael Yang committed
1109
func startUpload(ctx context.Context, mp ModelPath, layer *Layer, regOpts *RegistryOptions) (string, error) {
1110
	url := fmt.Sprintf("%s/v2/%s/blobs/uploads/", mp.Registry, mp.GetNamespaceRepository())
Michael Yang's avatar
Michael Yang committed
1111
1112
1113
	if layer.From != "" {
		url = fmt.Sprintf("%s/v2/%s/blobs/uploads/?mount=%s&from=%s", mp.Registry, mp.GetNamespaceRepository(), layer.Digest, layer.From)
	}
1114

1115
	resp, err := makeRequest(ctx, "POST", url, nil, nil, regOpts)
1116
1117
1118
1119
1120
1121
1122
	if err != nil {
		log.Printf("couldn't start upload: %v", err)
		return "", err
	}
	defer resp.Body.Close()

	// Check for success
Michael Yang's avatar
Michael Yang committed
1123
	if resp.StatusCode != http.StatusAccepted && resp.StatusCode != http.StatusCreated {
1124
		body, _ := io.ReadAll(resp.Body)
1125
		return "", fmt.Errorf("on upload registry responded with code %d: %s", resp.StatusCode, body)
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
	}

	// Extract UUID location from header
	location := resp.Header.Get("Location")
	if location == "" {
		return "", fmt.Errorf("location header is missing in response")
	}

	return location, nil
}

// Function to check if a blob already exists in the Docker registry
1138
func checkBlobExistence(ctx context.Context, mp ModelPath, digest string, regOpts *RegistryOptions) (bool, error) {
1139
	url := fmt.Sprintf("%s/v2/%s/blobs/%s", mp.Registry, mp.GetNamespaceRepository(), digest)
1140

1141
	resp, err := makeRequest(ctx, "HEAD", url, nil, nil, regOpts)
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
	if err != nil {
		log.Printf("couldn't check for blob: %v", err)
		return false, err
	}
	defer resp.Body.Close()

	// Check for success: If the blob exists, the Docker registry will respond with a 200 OK
	return resp.StatusCode == http.StatusOK, nil
}

1152
func uploadBlobChunked(ctx context.Context, mp ModelPath, url string, layer *Layer, regOpts *RegistryOptions, fn func(api.ProgressResponse)) error {
1153
1154
1155
1156
	// TODO allow resumability
	// TODO allow canceling uploads via DELETE
	// TODO allow cross repo blob mount

Patrick Devine's avatar
Patrick Devine committed
1157
	fp, err := GetBlobsPath(layer.Digest)
1158
1159
1160
1161
	if err != nil {
		return err
	}

1162
1163
1164
1165
	f, err := os.Open(fp)
	if err != nil {
		return err
	}
Michael Yang's avatar
Michael Yang committed
1166
	defer f.Close()
1167

1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
	totalUploaded := 0

	r, w := io.Pipe()
	defer r.Close()

	go func() {
		defer w.Close()
		for {
			n, err := io.CopyN(w, f, 1024*1024)
			if err != nil && !errors.Is(err, io.EOF) {
				fn(api.ProgressResponse{
					Status:    fmt.Sprintf("error copying pipe: %v", err),
					Digest:    layer.Digest,
					Total:     layer.Size,
					Completed: totalUploaded,
				})
				return
			}
1186

1187
			totalUploaded += int(n)
1188
1189

			fn(api.ProgressResponse{
1190
				Status:    fmt.Sprintf("uploading %s", layer.Digest),
1191
				Digest:    layer.Digest,
1192
1193
				Total:     layer.Size,
				Completed: totalUploaded,
1194
			})
1195
1196
1197
1198

			if totalUploaded >= layer.Size {
				return
			}
1199
		}
1200
	}()
1201

1202
	url = fmt.Sprintf("%s&digest=%s", url, layer.Digest)
1203

1204
1205
1206
1207
	headers := make(map[string]string)
	headers["Content-Type"] = "application/octet-stream"
	headers["Content-Range"] = fmt.Sprintf("0-%d", layer.Size-1)
	headers["Content-Length"] = strconv.Itoa(int(layer.Size))
1208

1209
	// finish the upload
1210
	resp, err := makeRequest(ctx, "PUT", url, headers, r, regOpts)
1211
1212
1213
1214
1215
1216
1217
1218
1219
	if err != nil {
		log.Printf("couldn't finish upload: %v", err)
		return err
	}
	defer resp.Body.Close()

	if resp.StatusCode != http.StatusCreated {
		body, _ := io.ReadAll(resp.Body)
		return fmt.Errorf("on finish upload registry responded with code %d: %v", resp.StatusCode, string(body))
1220
	}
1221
1222
1223
	return nil
}

1224
1225
1226
1227
1228
1229
func makeRequest(ctx context.Context, method, url string, headers map[string]string, body io.Reader, regOpts *RegistryOptions) (*http.Response, error) {
	retryCtx := ctx.Value("retries")
	var retries int
	var ok bool
	if retries, ok = retryCtx.(int); ok {
		if retries > MaxRetries {
Bruce MacDonald's avatar
Bruce MacDonald committed
1230
			return nil, fmt.Errorf("maximum retries hit; are you sure you have access to this resource?")
1231
1232
1233
		}
	}

1234
1235
1236
1237
1238
1239
1240
1241
	if !strings.HasPrefix(url, "http") {
		if regOpts.Insecure {
			url = "http://" + url
		} else {
			url = "https://" + url
		}
	}

Patrick Devine's avatar
Patrick Devine committed
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
	// make a copy of the body in case we need to try the call to makeRequest again
	var buf bytes.Buffer
	if body != nil {
		_, err := io.Copy(&buf, body)
		if err != nil {
			return nil, err
		}
	}

	bodyCopy := bytes.NewReader(buf.Bytes())

	req, err := http.NewRequest(method, url, bodyCopy)
1254
1255
1256
1257
	if err != nil {
		return nil, err
	}

Patrick Devine's avatar
Patrick Devine committed
1258
1259
1260
1261
	if regOpts.Token != "" {
		req.Header.Set("Authorization", "Bearer "+regOpts.Token)
	} else if regOpts.Username != "" && regOpts.Password != "" {
		req.SetBasicAuth(regOpts.Username, regOpts.Password)
1262
1263
	}

Patrick Devine's avatar
Patrick Devine committed
1264
1265
	for k, v := range headers {
		req.Header.Set(k, v)
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
	}

	client := &http.Client{
		CheckRedirect: func(req *http.Request, via []*http.Request) error {
			if len(via) >= 10 {
				return fmt.Errorf("too many redirects")
			}
			log.Printf("redirected to: %s\n", req.URL)
			return nil
		},
	}
	resp, err := client.Do(req)
	if err != nil {
		return nil, err
	}

Patrick Devine's avatar
Patrick Devine committed
1282
1283
1284
1285
	// if the request is unauthenticated, try to authenticate and make the request again
	if resp.StatusCode == http.StatusUnauthorized {
		auth := resp.Header.Get("Www-Authenticate")
		authRedir := ParseAuthRedirectString(string(auth))
1286
		token, err := getAuthToken(ctx, authRedir, regOpts)
Patrick Devine's avatar
Patrick Devine committed
1287
1288
1289
1290
1291
		if err != nil {
			return nil, err
		}
		regOpts.Token = token
		bodyCopy = bytes.NewReader(buf.Bytes())
1292
1293
		ctx = context.WithValue(ctx, "retries", retries+1)
		return makeRequest(ctx, method, url, headers, bodyCopy, regOpts)
Patrick Devine's avatar
Patrick Devine committed
1294
1295
	}

1296
1297
	return resp, nil
}
Michael Yang's avatar
Michael Yang committed
1298

Patrick Devine's avatar
Patrick Devine committed
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
func getValue(header, key string) string {
	startIdx := strings.Index(header, key+"=")
	if startIdx == -1 {
		return ""
	}

	// Move the index to the starting quote after the key.
	startIdx += len(key) + 2
	endIdx := startIdx

	for endIdx < len(header) {
		if header[endIdx] == '"' {
			if endIdx+1 < len(header) && header[endIdx+1] != ',' { // If the next character isn't a comma, continue
				endIdx++
				continue
			}
			break
		}
		endIdx++
	}
	return header[startIdx:endIdx]
}

func ParseAuthRedirectString(authStr string) AuthRedirect {
	authStr = strings.TrimPrefix(authStr, "Bearer ")

	return AuthRedirect{
		Realm:   getValue(authStr, "realm"),
		Service: getValue(authStr, "service"),
		Scope:   getValue(authStr, "scope"),
	}
}

1332
1333
var errDigestMismatch = fmt.Errorf("digest mismatch, file must be downloaded again")

Michael Yang's avatar
Michael Yang committed
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
func verifyBlob(digest string) error {
	fp, err := GetBlobsPath(digest)
	if err != nil {
		return err
	}

	f, err := os.Open(fp)
	if err != nil {
		return err
	}
	defer f.Close()

	fileDigest, _ := GetSHA256Digest(f)
	if digest != fileDigest {
1348
		return fmt.Errorf("%w: want %s, got %s", errDigestMismatch, digest, fileDigest)
Michael Yang's avatar
Michael Yang committed
1349
1350
1351
1352
	}

	return nil
}