app/AlbumSources/BackblazeB2Source.php

@@ -2,7 +2,6 @@
 
 namespace App\AlbumSources;
 
-use App\Album;
 use App\Photo;
 use App\Services\BackblazeB2Service;
 use App\Storage;
@@ -10,15 +9,26 @@ use Guzzle\Http\EntityBody;
 
 class BackblazeB2Source extends AlbumSourceBase implements IAlbumSource
 {
+    const BUCKET_TYPE_AUTO = 0;
+    const BUCKET_TYPE_PRIVATE = 1;
+    const BUCKET_TYPE_PUBLIC = 2;
+
     /**
      * @var BackblazeB2Service
      */
     private $backblaze;
 
-    public function __construct()
-    {
-        $this->backblaze = new BackblazeB2Service();
-    }
+    /**
+     * Type of bucket which determines what type of URLs to generate to images.
+     * @var integer
+     */
+    private $bucketType;
+
+    /**
+     * Token used to download files from a private bucket.
+     * @var string
+     */
+    private $downloadToken;
 
     /**
      * Deletes an entire album's media contents.
@@ -68,7 +78,31 @@ class BackblazeB2Source extends AlbumSourceBase implements IAlbumSource
      */
     public function getUrlToPhoto(Photo $photo, $thumbnail = null)
     {
-        // TODO: Implement getUrlToPhoto() method.
+        $client = $this->getClient();
+        $storagePathToFile = $this->getPathToPhoto($photo, $thumbnail);
+
+        /*
+         * From https://www.backblaze.com/b2/docs/b2_download_file_by_name.html:
+         * The base URL to use comes from the b2_authorize_account call, and looks something like
+         * https://f345.backblazeb2.com. The "f" in the URL stands for "file", and the number is the cluster
+         * number containing your account. To this base, you add "file/", your bucket name, a "/", and then the
+         * name of the file. The file name may itself include more "/" characters.
+         */
+        $fileDownloadUrl = sprintf('%s/file/%s/%s', $client->getDownloadUrl(), $this->configuration->container_name, $storagePathToFile);
+
+        switch ($this->bucketType)
+        {
+            case self::BUCKET_TYPE_PRIVATE:
+                if (is_null($this->downloadToken))
+                {
+                    $this->downloadToken = $client->getDownloadAuthToken();
+                }
+
+                return sprintf('%s?Authorization=%s', $fileDownloadUrl, $this->downloadToken);
+
+            case self::BUCKET_TYPE_PUBLIC:
+                return $fileDownloadUrl;
+        }
     }
 
     /**
@@ -88,15 +122,39 @@ class BackblazeB2Source extends AlbumSourceBase implements IAlbumSource
     public function setConfiguration(Storage $configuration)
     {
         parent::setConfiguration($configuration);
-
-        $this->backblaze->setCredentials(decrypt($configuration->access_key), decrypt($configuration->secret_key));
     }
 
     private function getClient()
     {
+        if (is_null($this->backblaze))
+        {
+            $this->backblaze = new BackblazeB2Service();
+            $this->backblaze->setCredentials(decrypt($this->configuration->access_key), decrypt($this->configuration->secret_key));
             $this->backblaze->authorizeAccount();
             $this->backblaze->setBucketName($this->configuration->container_name);
 
+            if (intval($this->configuration->b2_bucket_type) == self::BUCKET_TYPE_AUTO)
+            {
+                /* Auto-detect the type of bucket in use on B2 */
+
+                switch ($this->backblaze->getBucketType())
+                {
+                    case 'allPrivate':
+                        $this->configuration->b2_bucket_type = self::BUCKET_TYPE_PRIVATE;
+                        break;
+
+                    case 'allPublic':
+                        $this->configuration->b2_bucket_type = self::BUCKET_TYPE_PUBLIC;
+                        break;
+                }
+
+                $this->configuration->save();
+            }
+
+            // Set the bucket type
+            $this->bucketType = $this->configuration->b2_bucket_type;
+        }
+
         return $this->backblaze;
     }
 

app/Http/Controllers/Admin/StorageController.php

@@ -88,7 +88,8 @@ class StorageController extends Controller
             'container_name',
             'cdn_url',
             'access_key',
-            'secret_key'
+            'secret_key',
+            'b2_bucket_type'
         ]));
         $storage->is_active = true;
         $storage->is_default = (strtolower($request->get('is_default')) == 'on');
@@ -217,7 +218,8 @@ class StorageController extends Controller
             'container_name',
             'cdn_url',
             'access_key',
-            'secret_key'
+            'secret_key',
+            'b2_bucket_type'
         ]));
         $storage->is_active = (strtolower($request->get('is_active')) == 'on');
         $storage->is_default = (strtolower($request->get('is_default')) == 'on');

app/Services/BackblazeB2Service.php

@@ -10,14 +10,46 @@ class BackblazeB2Service
      */
     private $accountApiUrl;
 
+    /**
+     * ID of the account in Backblaze B2.
+     * @var string
+     */
     private $accountID;
 
+    /**
+     * The base URL for public access to the account's files.
+     * @var string
+     */
+    private $downloadUrl;
+
+    /**
+     * Authorisation header for authenticating to the API.
+     * @var string
+     */
     private $authHeader;
 
+    /**
+     * Authorisation token for accessing the API post-authentication.
+     * @var string
+     */
     private $authToken;
 
+    /**
+     * ID of the bucket.
+     * @var string
+     */
     private $bucketId;
 
+    /**
+     * Type of the bucket.
+     * @var integer
+     */
+    private $bucketType;
+
+    /**
+     * Configuration related to the Backblaze B2 service.
+     * @var \Illuminate\Config\Repository|mixed
+     */
     private $config;
 
     public function __construct()
@@ -39,12 +71,41 @@ class BackblazeB2Service
             $this->authToken = $result->authorizationToken;
             $this->accountApiUrl = $result->apiUrl;
             $this->accountID = $result->accountId;
+            $this->downloadUrl = $result->downloadUrl;
         }
     }
 
+    public function getBucketType()
+    {
+        return $this->bucketType;
+    }
+
+    public function getDownloadAuthToken()
+    {
+        $result = $this->sendRequest(
+            sprintf('%s/b2api/v2/b2_get_download_authorization', $this->accountApiUrl),
+            'POST',
+            [
+                'bucketId' => $this->bucketId,
+                'validDurationInSeconds' => intval($this->config['download_token_lifetime']),
+                'fileNamePrefix' => ''
+            ]
+        );
+
+        return $result->authorizationToken;
+    }
+
+    public function getDownloadUrl()
+    {
+        return $this->downloadUrl;
+    }
+
     public function setBucketName($bucketName)
     {
-        $this->bucketId = $this->getBucketIdFromName($bucketName);
+        $bucketDetails = $this->getBucketDetailsFromName($bucketName);
+
+        $this->bucketId = $bucketDetails->bucketId;
+        $this->bucketType = $bucketDetails->bucketType;
     }
 
     public function setCredentials($applicationKeyID, $applicationKey)
@@ -78,12 +139,17 @@ class BackblazeB2Service
         curl_setopt($ch, CURLOPT_POSTFIELDS, $fileContents);
 
         $result = curl_exec($ch);
+        $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
 
-        var_dump($result);
-        exit();
+        if ($httpCode != 200 && $httpCode != 304)
+        {
+            throw new \Exception(sprintf('Exception from Backblaze B2: %s', $result));
         }
 
-    private function getBucketIdFromName($bucketName)
+        curl_close($ch);
+    }
+
+    private function getBucketDetailsFromName($bucketName)
     {
         $result = $this->sendRequest(
             sprintf('%s/b2api/v2/b2_list_buckets', $this->accountApiUrl),
@@ -96,7 +162,7 @@ class BackblazeB2Service
 
         if (isset($result->buckets) && is_array($result->buckets) && count($result->buckets) >= 1)
         {
-            return $result->buckets[0]->bucketId;
+            return $result->buckets[0];
         }
 
         throw new \Exception(sprintf('The bucket \'%s\' was not found or your API key does not have access.', $bucketName));

app/Storage.php

@@ -30,7 +30,8 @@ class Storage extends Model
         'container_name',
         'cdn_url',
         'access_key',
-        'secret_key'
+        'secret_key',
+        'b2_bucket_type'
     ];
 
     public function albums()

config/services.php

@@ -15,7 +15,8 @@ return [
     */
 
     'backblaze_b2' => [
-        'auth_url' => 'https://api.backblazeb2.com/b2api/v2/b2_authorize_account'
+        'auth_url' => 'https://api.backblazeb2.com/b2api/v2/b2_authorize_account',
+        'download_token_lifetime' => 300
     ],
 
     'gitea' => [

database/migrations/2019_09_09_205137_add_backblaze_storage_columns.php

@@ -0,0 +1,34 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class AddBackblazeStorageColumns extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('storages', function (Blueprint $table)
+        {
+            $table->tinyInteger('b2_bucket_type')->default(0);
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('storages', function (Blueprint $table)
+        {
+            $table->dropColumn('b2_bucket_type');
+        });
+    }
+}

resources/lang/en/forms.php

@@ -101,6 +101,12 @@ return [
     'storage_application_key_id_label' => 'Application key ID:',
     'storage_application_key_label' => 'Application key:',
     'storage_auth_url_label' => 'Authentication URL:',
+    'storage_b2_bucket_type' => [
+        'autodetect' => 'Auto-detect',
+        'label' => 'Bucket type:',
+        'private' => 'Private',
+        'public' => 'Public'
+    ],
     'storage_bucket_name_label' => 'Bucket name:',
     'storage_cdn_url_label' => 'Public CDN URL (if supported and enabled):',
     'storage_container_name_label' => 'Container name:',

resources/views/themes/base/partials/admin_storages_backblaze_b2_options.blade.php

@@ -39,4 +39,20 @@
             @endif
         </div>
     </div>
+    <div class="col-md-6">
+        <div class="form-group">
+            <label class="form-control-label" for="b2-bucket-type">@lang('forms.storage_b2_bucket_type.label')</label>
+            <select class="form-control{{ $errors->has('b2_bucket_type') ? ' is-invalid' : '' }}" id="b2-bucket-type" name="b2_bucket_type">
+                <option value="0"{{ old('b2_bucket_type', $storage->b2_bucket_type) === 0 ? ' selected="selected"' : '' }}>@lang('forms.storage_b2_bucket_type.autodetect')</option>
+                <option value="1"{{ old('b2_bucket_type', $storage->b2_bucket_type) === 1 ? ' selected="selected"' : '' }}>@lang('forms.storage_b2_bucket_type.private')</option>
+                <option value="2"{{ old('b2_bucket_type', $storage->b2_bucket_type) === 2 ? ' selected="selected"' : '' }}>@lang('forms.storage_b2_bucket_type.public')</option>
+            </select>
+
+            @if ($errors->has('b2_bucket_type'))
+                <div class="invalid-feedback">
+                    <strong>{{ $errors->first('b2_bucket_type') }}</strong>
+                </div>
+            @endif
+        </div>
+    </div>
 </div>