feat(models): pull models from urls (#2750)

* feat(models): pull models from urls

When using `run` now we can point directly to hf models via URL, for
instance:

```bash
local-ai run
huggingface://TheBloke/TinyLlama-1.1B-Chat-v0.3-GGUF/tinyllama-1.1b-chat-v0.3.Q2_K.gguf
```

Will pull the gguf model and place it in the models folder - of course
this depends on the fact that the gguf file should be automatically
detected by our guesser mechanism in order to this to make effective.

Similarly now galleries can refer to single files in the API requests.

This also changes the download code and `yaml` files now are treated in
the same way, so now config files are saved with the appropriate name
(and not hashed anymore).

Signed-off-by: Ettore Di Giacinto <mudler@localai.io>

* Adapt tests

Signed-off-by: Ettore Di Giacinto <mudler@localai.io>

---------

Signed-off-by: Ettore Di Giacinto <mudler@localai.io>

pkg/startup/model_preload.go

@@ -3,6 +3,7 @@ package startup
 import (
 	"errors"
 	"fmt"
+	"net/url"
 	"os"
 	"path/filepath"
 	"strings"
@@ -77,19 +78,35 @@ func InstallModels(galleries []config.Gallery, modelLibraryURL string, modelPath
 
 			log.Info().Msgf("[startup] installed model from OCI repository: %s", ociName)
 		case downloader.LooksLikeURL(url):
-			log.Debug().Msgf("[startup] resolved model to download: %s", url)
+			log.Debug().Msgf("[startup] downloading %s", url)
+
+			// Extract filename from URL
+			fileName, e := filenameFromUrl(url)
+			if e != nil || fileName == "" {
+				fileName = utils.MD5(url)
+				if strings.HasSuffix(url, ".yaml") || strings.HasSuffix(url, ".yml") {
+					fileName = fileName + ".yaml"
+				}
+				log.Warn().Err(e).Str("url", url).Msg("error extracting filename from URL")
+				//err = errors.Join(err, e)
+				//continue
+			}
 
-			// md5 of model name
-			md5Name := utils.MD5(url)
+			modelPath := filepath.Join(modelPath, fileName)
+
+			if e := utils.VerifyPath(fileName, modelPath); e != nil {
+				log.Error().Err(e).Str("filepath", modelPath).Msg("error verifying path")
+				err = errors.Join(err, e)
+				continue
+			}
 
 			// check if file exists
-			if _, e := os.Stat(filepath.Join(modelPath, md5Name)); errors.Is(e, os.ErrNotExist) {
-				modelDefinitionFilePath := filepath.Join(modelPath, md5Name) + ".yaml"
-				e := downloader.DownloadFile(url, modelDefinitionFilePath, "", 0, 0, func(fileName, current, total string, percent float64) {
+			if _, e := os.Stat(modelPath); errors.Is(e, os.ErrNotExist) {
+				e := downloader.DownloadFile(url, modelPath, "", 0, 0, func(fileName, current, total string, percent float64) {
 					utils.DisplayDownloadFunction(fileName, current, total, percent)
 				})
 				if e != nil {
-					log.Error().Err(e).Str("url", url).Str("filepath", modelDefinitionFilePath).Msg("error downloading model")
+					log.Error().Err(e).Str("url", url).Str("filepath", modelPath).Msg("error downloading model")
 					err = errors.Join(err, e)
 				}
 			}
@@ -150,3 +167,20 @@ func installModel(galleries []config.Gallery, modelName, modelPath string, downl
 
 	return nil, true
 }
+
+func filenameFromUrl(urlstr string) (string, error) {
+	// strip anything after @
+	if strings.Contains(urlstr, "@") {
+		urlstr = strings.Split(urlstr, "@")[0]
+	}
+
+	u, err := url.Parse(urlstr)
+	if err != nil {
+		return "", fmt.Errorf("error due to parsing url: %w", err)
+	}
+	x, err := url.QueryUnescape(u.EscapedPath())
+	if err != nil {
+		return "", fmt.Errorf("error due to escaping: %w", err)
+	}
+	return filepath.Base(x), nil
+}

pkg/startup/model_preload_test.go

@@ -20,7 +20,7 @@ var _ = Describe("Preload test", func() {
 			tmpdir, err := os.MkdirTemp("", "")
 			Expect(err).ToNot(HaveOccurred())
 			libraryURL := "https://raw.githubusercontent.com/mudler/LocalAI/master/embedded/model_library.yaml"
-			fileName := fmt.Sprintf("%s.yaml", "1701d57f28d47552516c2b6ecc3cc719")
+			fileName := fmt.Sprintf("%s.yaml", "phi-2")
 
 			InstallModels([]config.Gallery{}, libraryURL, tmpdir, true, nil, "phi-2")
 
@@ -36,7 +36,7 @@ var _ = Describe("Preload test", func() {
 			tmpdir, err := os.MkdirTemp("", "")
 			Expect(err).ToNot(HaveOccurred())
 			url := "https://raw.githubusercontent.com/mudler/LocalAI/master/examples/configurations/phi-2.yaml"
-			fileName := fmt.Sprintf("%s.yaml", utils.MD5(url))
+			fileName := fmt.Sprintf("%s.yaml", "phi-2")
 
 			InstallModels([]config.Gallery{}, "", tmpdir, true, nil, url)
 
@@ -79,5 +79,19 @@ var _ = Describe("Preload test", func() {
 
 			Expect(string(content)).To(ContainSubstring("name: mistral-openorca"))
 		})
+		It("downloads from urls", func() {
+			tmpdir, err := os.MkdirTemp("", "")
+			Expect(err).ToNot(HaveOccurred())
+			url := "huggingface://TheBloke/TinyLlama-1.1B-Chat-v0.3-GGUF/tinyllama-1.1b-chat-v0.3.Q2_K.gguf"
+			fileName := fmt.Sprintf("%s.gguf", "tinyllama-1.1b-chat-v0.3.Q2_K")
+
+			err = InstallModels([]config.Gallery{}, "", tmpdir, false, nil, url)
+			Expect(err).ToNot(HaveOccurred())
+
+			resultFile := filepath.Join(tmpdir, fileName)
+
+			_, err = os.Stat(resultFile)
+			Expect(err).ToNot(HaveOccurred())
+		})
 	})
 })