add download handler

Makefile

@@ -8,9 +8,5 @@ build: lint
 lint:
 	golangci-lint run --fix
 
-# .run-meilisearch:
-# 	docker-compose up -d meilisearch
-
 run: lint
-	# while [ "`curl --insecure -s -o /dev/null -w ''%{http_code}'' http://localhost:7700/health`" != "200" ]; do sleep 2; echo "waiting..."; done
 	go run main.go

handlers/download/handler.go

@@ -0,0 +1,47 @@
+package download
+
+import (
+	"fmt"
+	"librapi/services"
+	"net/http"
+	"path/filepath"
+
+	"github.com/rs/zerolog/log"
+)
+
+const URL = "/download"
+
+func Handler(bs services.IStore) func(http.ResponseWriter, *http.Request) {
+	return func(w http.ResponseWriter, r *http.Request) {
+		switch r.Method {
+		case http.MethodGet:
+			getDownload(w, r, bs)
+		default:
+			http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
+		}
+	}
+}
+
+func getDownload(w http.ResponseWriter, r *http.Request, bs services.IStore) {
+	queryParams := r.URL.Query()
+	downloadFiles, ok := queryParams["file"]
+	if !ok {
+		log.Error().Msg("file query param does not exist")
+		http.Error(w, "file does not exists", http.StatusBadRequest)
+		return
+	}
+
+	if len(downloadFiles) != 1 {
+		log.Error().Msg("only one file is allowed to download")
+		http.Error(w, "only one file is allowed to download", http.StatusBadRequest)
+		return
+	}
+
+	filename := downloadFiles[0]
+	filePath := filepath.Join(bs.GetStoreDir(), filename)
+
+	http.ServeFile(w, r, filePath)
+
+	w.Header().Set("Content-Disposition", fmt.Sprintf("attachment; filename=%s", filename))
+	w.Header().Set("Content-Type", "application/pdf")
+}

main.go

@@ -12,6 +12,7 @@ import (
 	"github.com/rs/zerolog"
 	"github.com/rs/zerolog/log"
 
+	"librapi/handlers/download"
 	"librapi/handlers/home"
 	"librapi/handlers/login"
 	"librapi/handlers/upload"
@@ -64,6 +65,7 @@ func main() {
 		server.NewHandler(home.URL, home.Handler(bs)),
 		server.NewHandler(upload.URL, upload.Handler(auth, bs)),
 		server.NewHandler(login.URL, login.Handler(auth)),
+		server.NewHandler(download.URL, download.Handler(bs)),
 	)
 	srv.Serve()
 

services/book_store.go

@@ -24,6 +24,7 @@ var (
 type IStore interface {
 	Save(bm *BookMetadata, content io.ReadCloser) error
 	Search(value string) ([]BookMetadata, error)
+	GetStoreDir() string
 }
 
 var _ IStore = (*BookStore)(nil)
@@ -168,6 +169,10 @@ func (bs *BookStore) Done() <-chan struct{} {
 	return chDone
 }
 
+func (bs *BookStore) GetStoreDir() string {
+	return bs.dir
+}
+
 func (bs *BookStore) Save(bm *BookMetadata, content io.ReadCloser) error {
 	bs.processing.Add(1)
 	defer bs.processing.Done()

templates/home.html.tpl

@@ -1,5 +1,5 @@
 {{ define "content" }}
-<h3>A simple API to store, search and download books.</h3>
+<h3>A simple API to store, search and download books, articles, etc...</h3>
 <div>No extra JS, CSS or fancy stuff. You click, you search, you found, you're happy.</div>
 <form action="/home" method="post" enctype="multipart/form-data">
   <div class="main-container">
@@ -27,17 +27,19 @@
 <table>
   <tr>
     <th>Name</th>
+    <th>Description</th>
     <th>Editor</th>
     <th>Authors</th>
     <th>Year</th>
   </tr>
   {{range .Results}}
   <tr>
-    <td><div style="margin: 10px;">{{.Name}}</div></td>
+    <td><div style="margin: 10px; word-wrap: break-word; width: 300px;">{{.Name}}</div></td>
+    <td><div style="margin: 10px; word-wrap: break-word; width: 300px;">{{.Description | noDesc}}</div></td>
     <td style="text-align: center;"><div style="margin: 10px;">{{.Editor}}</div></td>
-    <td style="text-align: center;"><div style="margin: 10px;">{{.Authors | join }}</div></td>
+    <td style="text-align: center; word-wrap: break-word; width: 300px;"><div style="margin: 10px;">{{.Authors | join }}</div></td>
     <td><div style="margin: 20px;">{{.Year}}</div></td>
-    <td><div style="margin: 20px;">{{.Path | bookUrl}}</div></td>
+    <td><div style="margin: 20px;"><a target="_blank" href="{{.Path | bookUrl}}">Download</a></div></td>
   </tr>
   {{ end }}
 </table>

templates/templates.go

@@ -39,7 +39,7 @@ var funcMap = template.FuncMap{
 		if len(s) == 0 {
 			return ""
 		} else {
-			return strings.Join(s, ",")
+			return strings.Join(s, ", ")
 		}
 	},
 	"filename": func(h *multipart.FileHeader) string {
@@ -56,7 +56,13 @@ var funcMap = template.FuncMap{
 	},
 	"bookUrl": func(path string) string {
 		_, filename := filepath.Split(path)
-		return fmt.Sprintf("https://books.thegux.fr/downloads/%s", filename)
+		return fmt.Sprintf("/download?file=%s", filename)
+	},
+	"noDesc": func(desc *string) string {
+		if desc == nil {
+			return ""
+		}
+		return *desc
 	},
 }