diff --git a/app/src/main/java/com/stardust/scriptdroid/network/download/DownloadManager.java b/app/src/main/java/com/stardust/scriptdroid/network/download/DownloadManager.java
index d978d025..69b7e8da 100644
--- a/app/src/main/java/com/stardust/scriptdroid/network/download/DownloadManager.java
+++ b/app/src/main/java/com/stardust/scriptdroid/network/download/DownloadManager.java
@@ -111,7 +111,7 @@ public class DownloadManager {
             mInputStream = body.byteStream();
             long total = body.contentLength();
             long read = 0;
-            while (read < total) {
+            while (true) {
                 if (!mStatus.get()) {
                     onCancel();
                     return;
@@ -122,7 +122,9 @@ public class DownloadManager {
                 }
                 read += len;
                 mFileOutputStream.write(buffer, 0, len);
-                mProgress.onNext((int) (100 * read / total));
+                if (total > 0) {
+                    mProgress.onNext((int) (100 * read / total));
+                }
             }
             mProgress.onComplete();
             recycle();
diff --git a/app/src/main/java/com/stardust/scriptdroid/ui/common/ScriptOperations.java b/app/src/main/java/com/stardust/scriptdroid/ui/common/ScriptOperations.java
index 16bbfcf0..8de68229 100644
--- a/app/src/main/java/com/stardust/scriptdroid/ui/common/ScriptOperations.java
+++ b/app/src/main/java/com/stardust/scriptdroid/ui/common/ScriptOperations.java
@@ -28,6 +28,7 @@ import com.stardust.scriptdroid.model.script.ScriptFile;
 import com.stardust.scriptdroid.model.script.Scripts;
 import com.stardust.scriptdroid.storage.file.StorageFileProvider;
 import com.stardust.scriptdroid.network.download.DownloadManager;
+import com.stardust.scriptdroid.tool.SimpleObserver;
 import com.stardust.scriptdroid.ui.filechooser.FileChooserDialogBuilder;
 import com.stardust.scriptdroid.ui.shortcut.ShortcutCreateActivity;
 import com.stardust.scriptdroid.ui.timing.TimedTaskSettingActivity_;
@@ -274,18 +275,22 @@ public class ScriptOperations {
         DownloadManager.getInstance().download(url, path)
                 .observeOn(AndroidSchedulers.mainThread())
                 .doOnNext(progressDialog::setProgress)
-                .doOnComplete(() -> {
-                    progressDialog.dismiss();
-                    subject.onNext(new ScriptFile(path));
-                    subject.onComplete();
-                })
-                .doOnError(error -> {
-                    Log.e(LOG_TAG, "Download failed", error);
-                    progressDialog.dismiss();
-                    showMessage(R.string.text_download_failed);
-                    subject.onError(error);
-                })
-                .subscribe();
+                .subscribe(new SimpleObserver<Integer>() {
+                    @Override
+                    public void onComplete() {
+                        progressDialog.dismiss();
+                        subject.onNext(new ScriptFile(path));
+                        subject.onComplete();
+                    }
+
+                    @Override
+                    public void onError(Throwable error) {
+                        Log.e(LOG_TAG, "Download failed", error);
+                        progressDialog.dismiss();
+                        showMessage(R.string.text_download_failed);
+                        subject.onError(error);
+                    }
+                });
         return subject;
     }
 
diff --git a/app/src/main/java/com/stardust/scriptdroid/ui/main/community/CommunityWebView.java b/app/src/main/java/com/stardust/scriptdroid/ui/main/community/CommunityWebView.java
index faedb0f6..35aac2c4 100644
--- a/app/src/main/java/com/stardust/scriptdroid/ui/main/community/CommunityWebView.java
+++ b/app/src/main/java/com/stardust/scriptdroid/ui/main/community/CommunityWebView.java
@@ -5,6 +5,7 @@ import android.net.Uri;
 import android.support.design.widget.BottomSheetDialog;
 import android.support.design.widget.Snackbar;
 import android.util.AttributeSet;
+import android.view.View;
 import android.webkit.ValueCallback;
 import android.webkit.WebView;
 
@@ -21,6 +22,7 @@ import java.util.regex.Pattern;
 
 import butterknife.OnClick;
 import butterknife.Optional;
+import io.reactivex.Observable;
 import io.reactivex.android.schedulers.AndroidSchedulers;
 
 /**
@@ -55,7 +57,6 @@ public class CommunityWebView extends EWebView {
                 .title(fileName)
                 .item(R.id.save, R.drawable.ic_file_download_black_48dp, R.string.text_download)
                 .item(R.id.run, R.drawable.ic_play_arrow_white_48dp, R.string.text_run)
-                .item(R.id.edit, R.drawable.ic_edit_white_24dp, R.string.text_save_and_edit)
                 .bindItemClick(this)
                 .build());
         mBottomSheetDialog.show();
@@ -68,19 +69,12 @@ public class CommunityWebView extends EWebView {
         new ScriptOperations(getContext(), CommunityWebView.this)
                 .download(mUrl)
                 .observeOn(AndroidSchedulers.mainThread())
+                .onErrorResumeNext(Observable.empty())
                 .subscribe(file ->
                         Snackbar.make(CommunityWebView.this, getResources().getString(R.string.format_file_downloaded, file.getPath())
-                                , Snackbar.LENGTH_SHORT).show());
-    }
-
-    @Optional
-    @OnClick(R.id.edit)
-    void saveAndEdit() {
-        dismissBottomSheetDialog();
-        new ScriptOperations(getContext(), CommunityWebView.this)
-                .download(mUrl)
-                .observeOn(AndroidSchedulers.mainThread())
-                .subscribe(Scripts::edit);
+                                , Snackbar.LENGTH_LONG)
+                                .setAction(R.string.text_open, v -> Scripts.edit(file))
+                                .show());
     }
 
     @Optional
@@ -90,6 +84,7 @@ public class CommunityWebView extends EWebView {
         new ScriptOperations(getContext(), CommunityWebView.this)
                 .temporarilyDownload(mUrl)
                 .observeOn(AndroidSchedulers.mainThread())
+                .onErrorResumeNext(Observable.empty())
                 .subscribe(file -> {
                     Snackbar.make(CommunityWebView.this, R.string.text_start_running, Snackbar.LENGTH_SHORT).show();
                     Scripts.run(file);
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 42f2ed51..0eafa6cb 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -325,4 +325,5 @@
     <string name="no_apk_builder_plugin">没有安装打包插件，是否立即下载？</string>
     <string name="text_apk_builder_plugin_unavailable">打包插件不可用</string>
     <string name="text_detail">详情</string>
+    <string name="text_open">打开</string>
 </resources>