add back full update

lib/main.js

@@ -95,7 +95,7 @@ export const cInfo = {
 
 function assertRelease() {
   if (__DEV__) {
-    throw new Error('react-native-update can only run on RELEASE version.');
+    throw new Error('react-native-update 只能在 RELEASE 版本中运行.');
   }
 }
 
@@ -138,7 +138,7 @@ export async function checkUpdate(APPKEY, isRetry) {
     });
   } catch (e) {
     if (isRetry) {
-      throw new Error('Could not connect to pushy server');
+      throw new Error('无法连接更新服务器，请检查网络连接后重试');
     }
     await tryBackupEndpoints(APPKEY);
     return checkUpdate(APPKEY, true);
@@ -209,6 +209,7 @@ export async function downloadUpdate(options, eventListeners) {
       );
     }
   }
+  let succeeded = false;
   if (options.diffUrl) {
     logger('downloading diff');
     try {
@@ -217,38 +218,45 @@ export async function downloadUpdate(options, eventListeners) {
         hash: options.hash,
         originHash: currentVersion,
       });
+      succeeded = true;
     } catch (e) {
       logger(`diff error: ${e.message}, try pdiff`);
-      try {
-        await Pushy.downloadPatchFromPackage({
-          updateUrl: options.pdiffUrl,
-          hash: options.hash,
-        });
-      } catch (e) {
-        progressHandler && progressHandler.remove();
-        report(options.hash, 'error');
-        throw e;
-      }
     }
-  } else if (options.pdiffUrl) {
+  }
+  if (!succeeded && options.pdiffUrl) {
     logger('downloading pdiff');
     try {
       await Pushy.downloadPatchFromPackage({
         updateUrl: options.pdiffUrl,
         hash: options.hash,
       });
+      succeeded = true;
     } catch (e) {
-      progressHandler && progressHandler.remove();
-      report(options.hash, 'error');
-      throw e;
+      logger(`pdiff error: ${e.message}, try full patch`);
     }
   }
+  if (!succeeded && options.updateUrl) {
+    logger('downloading full patch');
+    try {
+      await Pushy.downloadFullUpdate({
+        updateUrl: options.updateUrl,
+        hash: options.hash,
+      });
+      succeeded = true;
+    } catch (e) {
+      logger(`full patch error: ${e.message}`);
+    }
+  }
+  progressHandler && progressHandler.remove();
+  if (!succeeded) {
+    report(options.hash, 'error');
+    throw new Error('all update attempts failed');
+  }
   setLocalHashInfo(options.hash, {
     name: options.name,
     description: options.description,
     metaInfo: options.metaInfo,
   });
-  progressHandler && progressHandler.remove();
   downloadedHash = options.hash;
   return options.hash;
 }