Add support for partially uploaded files

Summary:
Ref T7149. This flags allocated but incomplete files and doesn't explode when trying to download them.

Files are marked complete when the last chunk is uploaded.

I added a key on `<authorPHID, isPartial>` so we can show you a list of partially uploaded files and prompt you to resume them at some point down the road.

Test Plan: Massaged debugging settings and uploaded README.md very slowly in 32b chunks. Saw the file lose its "Partial" flag when the last chunk finished.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: joshuaspence, epriestley

Maniphest Tasks: T7149

Differential Revision: https://secure.phabricator.com/D12063

resources/sql/autopatches/20150312.filechunk.2.sql

@@ -0,0 +1,2 @@
+ALTER TABLE {$NAMESPACE}_file.file
+  ADD isPartial BOOL NOT NULL DEFAULT 0;

resources/sql/autopatches/20150312.filechunk.3.sql

@@ -0,0 +1,2 @@
+ALTER TABLE {$NAMESPACE}_file.file
+  ADD KEY `key_partial` (authorPHID, isPartial);

src/applications/files/conduit/FileAllocateConduitAPIMethod.php

@@ -53,7 +53,7 @@ final class FileAllocateConduitAPIMethod
         $hash,
         $properties);
 
-      if ($file && !$force_chunking) {
+      if ($file) {
         return array(
           'upload' => false,
           'filePHID' => $file->getPHID(),
@@ -70,7 +70,7 @@ final class FileAllocateConduitAPIMethod
 
       if ($file) {
         return array(
-          'upload' => $file->isPartial(),
+          'upload' => (bool)$file->getIsPartial(),
           'filePHID' => $file->getPHID(),
         );
       }
@@ -103,7 +103,7 @@ final class FileAllocateConduitAPIMethod
         // Otherwise, this is a large file and we need to perform a chunked
         // upload.
 
-        $chunk_properties = array();
+        $chunk_properties = $properties;
 
         if ($hash) {
           $chunk_properties += array(

src/applications/files/conduit/FileConduitAPIMethod.php

@@ -89,6 +89,16 @@ abstract class FileConduitAPIMethod extends ConduitAPIMethod {
     return $data;
   }
 
+  protected function loadAnyMissingChunk(
+    PhabricatorUser $viewer,
+    PhabricatorFile $file) {
+
+    return $this->newChunkQuery($viewer, $file)
+      ->withIsComplete(false)
+      ->setLimit(1)
+      ->execute();
+  }
+
   private function newChunkQuery(
     PhabricatorUser $viewer,
     PhabricatorFile $file) {
@@ -106,4 +116,5 @@ abstract class FileConduitAPIMethod extends ConduitAPIMethod {
       ->withChunkHandles(array($file->getStorageHandle()));
   }
 
+
 }

src/applications/files/conduit/FileUploadChunkConduitAPIMethod.php

@@ -57,16 +57,19 @@ final class FileUploadChunkConduitAPIMethod
 
     // NOTE: These files have a view policy which prevents normal access. They
     // are only accessed through the storage engine.
-    $file = PhabricatorFile::newFromFileData(
+    $chunk_data = PhabricatorFile::newFromFileData(
       $data,
       array(
         'name' => $file->getMonogram().'.chunk-'.$chunk->getID(),
         'viewPolicy' => PhabricatorPolicies::POLICY_NOONE,
       ));
 
-    $chunk->setDataFilePHID($file->getPHID())->save();
+    $chunk->setDataFilePHID($chunk_data->getPHID())->save();
 
-    // TODO: If all chunks are up, mark the file as complete.
+    $missing = $this->loadAnyMissingChunk($viewer, $file);
+    if (!$missing) {
+      $file->setIsPartial(0)->save();
+    }
 
     return null;
   }

src/applications/files/controller/PhabricatorFileDataController.php

@@ -5,6 +5,7 @@ final class PhabricatorFileDataController extends PhabricatorFileController {
   private $phid;
   private $key;
   private $token;
+  private $file;
 
   public function willProcessRequest(array $data) {
     $this->phid = $data['phid'];
@@ -16,20 +17,9 @@ final class PhabricatorFileDataController extends PhabricatorFileController {
     return false;
   }
 
-  protected function checkFileAndToken($file) {
-    if (!$file) {
-      return new Aphront404Response();
-    }
-
-    if (!$file->validateSecretKey($this->key)) {
-      return new Aphront403Response();
-    }
-
-    return null;
-  }
-
   public function processRequest() {
     $request = $this->getRequest();
+    $viewer = $this->getViewer();
 
     $alt = PhabricatorEnv::getEnvConfig('security.alternate-file-domain');
     $base_uri = PhabricatorEnv::getEnvConfig('phabricator.base-uri');
@@ -44,32 +34,22 @@ final class PhabricatorFileDataController extends PhabricatorFileController {
       // Alternate files domain isn't configured or it's set
       // to the same as the default domain
 
-      // load the file with permissions checks;
-      $file = id(new PhabricatorFileQuery())
-        ->setViewer($request->getUser())
-        ->withPHIDs(array($this->phid))
-        ->executeOne();
-
-      $error_response = $this->checkFileAndToken($file);
-      if ($error_response) {
-        return $error_response;
+      $response = $this->loadFile($viewer);
+      if ($response) {
+        return $response;
       }
+      $file = $this->getFile();
 
       // when the file is not CDNable, don't allow cache
       $cache_response = $file->getCanCDN();
     } else if ($req_domain != $alt_domain) {
       // Alternate domain is configured but this request isn't using it
 
-      // load the file with permissions checks;
-      $file = id(new PhabricatorFileQuery())
-        ->setViewer($request->getUser())
-        ->withPHIDs(array($this->phid))
-        ->executeOne();
-
-      $error_response = $this->checkFileAndToken($file);
-      if ($error_response) {
-        return $error_response;
+      $response = $this->loadFile($viewer);
+      if ($response) {
+        return $response;
       }
+      $file = $this->getFile();
 
       // if the user can see the file, generate a token;
       // redirect to the alt domain with the token;
@@ -82,18 +62,15 @@ final class PhabricatorFileDataController extends PhabricatorFileController {
         ->setURI($token_uri);
 
     } else {
-      // We are using the alternate domain
+      // We are using the alternate domain. We don't have authentication
+      // on this domain, so we bypass policy checks when loading the file.
 
-      // load the file, bypassing permission checks;
-      $file = id(new PhabricatorFileQuery())
-        ->setViewer(PhabricatorUser::getOmnipotentUser())
-        ->withPHIDs(array($this->phid))
-        ->executeOne();
-
-      $error_response = $this->checkFileAndToken($file);
-      if ($error_response) {
-        return $error_response;
+      $bypass_policies = PhabricatorUser::getOmnipotentUser();
+      $response = $this->loadFile($bypass_policies);
+      if ($response) {
+        return $response;
       }
+      $file = $this->getFile();
 
       $acquire_token_uri = id(new PhutilURI($file->getViewURI()))
         ->setDomain($main_domain);
@@ -205,4 +182,44 @@ final class PhabricatorFileDataController extends PhabricatorFileController {
     return $uri;
   }
 
+  private function loadFile(PhabricatorUser $viewer) {
+    $file = id(new PhabricatorFileQuery())
+      ->setViewer($viewer)
+      ->withPHIDs(array($this->phid))
+      ->executeOne();
+
+    if (!$file) {
+      return new Aphront404Response();
+    }
+
+    if (!$file->validateSecretKey($this->key)) {
+      return new Aphront403Response();
+    }
+
+    if ($file->getIsPartial()) {
+      // We may be on the CDN domain, so we need to use a fully-qualified URI
+      // here to make sure we end up back on the main domain.
+      $info_uri = PhabricatorEnv::getURI($file->getInfoURI());
+
+      return $this->newDialog()
+        ->setTitle(pht('Partial Upload'))
+        ->appendParagraph(
+          pht(
+            'This file has only been partially uploaded. It must be '.
+            'uploaded completely before you can download it.'))
+        ->addCancelButton($info_uri);
+    }
+
+    $this->file = $file;
+
+    return null;
+  }
+
+  private function getFile() {
+    if (!$this->file) {
+      throw new Exception(pht('Call loadFile() before getFile()!'));
+    }
+    return $this->file;
+  }
+
 }

src/applications/files/controller/PhabricatorFileInfoController.php

@@ -52,11 +52,21 @@ final class PhabricatorFileInfoController extends PhabricatorFileController {
     $ttl = $file->getTTL();
     if ($ttl !== null) {
       $ttl_tag = id(new PHUITagView())
-        ->setType(PHUITagView::TYPE_OBJECT)
+        ->setType(PHUITagView::TYPE_STATE)
+        ->setBackgroundColor(PHUITagView::COLOR_YELLOW)
         ->setName(pht('Temporary'));
       $header->addTag($ttl_tag);
     }
 
+    $partial = $file->getIsPartial();
+    if ($partial) {
+      $partial_tag = id(new PHUITagView())
+        ->setType(PHUITagView::TYPE_STATE)
+        ->setBackgroundColor(PHUITagView::COLOR_ORANGE)
+        ->setName(pht('Partial Upload'));
+      $header->addTag($partial_tag);
+    }
+
     $actions = $this->buildActionView($file);
     $timeline = $this->buildTransactionView($file);
     $crumbs = $this->buildApplicationCrumbs();
@@ -126,21 +136,27 @@ final class PhabricatorFileInfoController extends PhabricatorFileController {
       ->setObjectURI($this->getRequest()->getRequestURI())
       ->setObject($file);
 
+    $can_download = !$file->getIsPartial();
+
     if ($file->isViewableInBrowser()) {
       $view->addAction(
         id(new PhabricatorActionView())
           ->setName(pht('View File'))
           ->setIcon('fa-file-o')
-          ->setHref($file->getViewURI()));
+          ->setHref($file->getViewURI())
+          ->setDisabled(!$can_download)
+          ->setWorkflow(!$can_download));
     } else {
       $view->addAction(
         id(new PhabricatorActionView())
           ->setUser($viewer)
-          ->setRenderAsForm(true)
-          ->setDownload(true)
+          ->setRenderAsForm($can_download)
+          ->setDownload($can_download)
           ->setName(pht('Download File'))
           ->setIcon('fa-download')
-          ->setHref($file->getViewURI()));
+          ->setHref($file->getViewURI())
+          ->setDisabled(!$can_download)
+          ->setWorkflow(!$can_download));
     }
 
     $view->addAction(

src/applications/files/query/PhabricatorFileChunkQuery.php

@@ -6,6 +6,7 @@ final class PhabricatorFileChunkQuery
   private $chunkHandles;
   private $rangeStart;
   private $rangeEnd;
+  private $isComplete;
   private $needDataFiles;
 
   public function withChunkHandles(array $handles) {
@@ -19,6 +20,11 @@ final class PhabricatorFileChunkQuery
     return $this;
   }
 
+  public function withIsComplete($complete) {
+    $this->isComplete = $complete;
+    return $this;
+  }
+
   public function needDataFiles($need) {
     $this->needDataFiles = $need;
     return $this;
@@ -104,6 +110,18 @@ final class PhabricatorFileChunkQuery
         $this->rangeEnd);
     }
 
+    if ($this->isComplete !== null) {
+      if ($this->isComplete) {
+        $where[] = qsprintf(
+          $conn_r,
+          'dataFilePHID IS NOT NULL');
+      } else {
+        $where[] = qsprintf(
+          $conn_r,
+          'dataFilePHID IS NULL');
+      }
+    }
+
     $where[] = $this->buildPagingClause($conn_r);
 
     return $this->formatWhereClause($where);

src/applications/files/storage/PhabricatorFile.php

@@ -51,6 +51,7 @@ final class PhabricatorFile extends PhabricatorFileDAO
   protected $ttl;
   protected $isExplicitUpload = 1;
   protected $viewPolicy = PhabricatorPolicies::POLICY_USER;
+  protected $isPartial = 0;
 
   private $objects = self::ATTACHABLE;
   private $objectPHIDs = self::ATTACHABLE;
@@ -67,6 +68,7 @@ final class PhabricatorFile extends PhabricatorFileDAO
 
     return id(new PhabricatorFile())
       ->setViewPolicy($view_policy)
+      ->setIsPartial(0)
       ->attachOriginalFile(null)
       ->attachObjects(array())
       ->attachObjectPHIDs(array());
@@ -91,6 +93,7 @@ final class PhabricatorFile extends PhabricatorFileDAO
         'ttl' => 'epoch?',
         'isExplicitUpload' => 'bool?',
         'mailKey' => 'bytes20',
+        'isPartial' => 'bool',
       ),
       self::CONFIG_KEY_SCHEMA => array(
         'key_phid' => null,
@@ -110,6 +113,9 @@ final class PhabricatorFile extends PhabricatorFileDAO
         'key_dateCreated' => array(
           'columns' => array('dateCreated'),
         ),
+        'key_partial' => array(
+          'columns' => array('authorPHID', 'isPartial'),
+        ),
       ),
     ) + parent::getConfiguration();
   }
@@ -294,6 +300,7 @@ final class PhabricatorFile extends PhabricatorFileDAO
     $file->setStorageEngine($engine->getEngineIdentifier());
     $file->setStorageHandle(PhabricatorFileChunk::newChunkHandle());
     $file->setStorageFormat(self::STORAGE_FORMAT_RAW);
+    $file->setIsPartial(1);
 
     $file->readPropertiesFromParameters($params);
 
@@ -628,10 +635,17 @@ final class PhabricatorFile extends PhabricatorFileDAO
     }
     $parts[] = $name;
 
-    $path = implode('/', $parts);
+    $path = '/'.implode('/', $parts);
 
+    // If this file is only partially uploaded, we're just going to return a
+    // local URI to make sure that Ajax works, since the page is inevitably
+    // going to give us an error back.
+    if ($this->getIsPartial()) {
+      return PhabricatorEnv::getURI($path);
+    } else {
       return PhabricatorEnv::getCDNURI($path);
     }
+  }
 
   /**
    * Get the CDN URI for this file, including a one-time-use security token.
@@ -1170,11 +1184,6 @@ final class PhabricatorFile extends PhabricatorFileDAO
       ->setURI($uri);
   }
 
-  public function isPartial() {
-    // TODO: Placeholder for resumable uploads.
-    return false;
-  }
-
 
 /* -(  PhabricatorApplicationTransactionInterface  )------------------------- */