how to proguard prevent from stripping array - android-proguard

I have implemented gooeymenu in a layout file:
<com.mschwartz.dailyflightbuddy.ui.GooeyMenu
android:id="#+id/gooeymenu"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_below="#id/btn_text_cockpit"
android:layout_centerInParent="true"
android:alpha="0.8"
app:center_drawable="#drawable/ic_settings_white_48dp"
app:hide_on_start="true"
app:itemorientation="LEFT"
app:menu_reference="#array/gooeymenu_command_array" />
The menu_reference tag points to a file res/values/array.xml with the following content:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<array name="gooeymenu_command_array">
<item>#drawable/gooey_info_item</item>
<item>#drawable/gooey_zoom_item</item>
<item>#drawable/gooey_center_item</item>
<item>#drawable/gooey_city_item</item>
<item>#drawable/gooey_airport_item</item>
<item>#drawable/gooey_configure_item</item>
</array>
</resources>
When running in the debugger everything works fine but when running from the stripped production version gooeymenu does not show any items.
I have tried to add several commands to proguard-rules.pro including the following:
-keepclassmembers class com.mschwartz.dailyflightbuddy.R$array {
*;
}
-keepclassmembers class **.R$* {
public static <fields>;
}
but without any luck so far. So my questions are:
How can I verify if the fields have really been stripped from the
production apk or how can I make sure if a field (or more common a class/method) is included?
How can I command proguard to add the fields?

The problem was that I use an ObjectAnimator which changes the property of an object by referencing the method by its name:
'ObjectAnimator animShowAlpha = ObjectAnimator.ofFloat(circlePoint, "Alpha", 0.0f, 1.0f);'
proguard however mangles the names of the objects and hence the method CirclePoint.setAlpha(..) was renamed to a(..). So the solution was to add a line to proguard to prevent renaming the methods of the class CirclePoint:
-keep class com.mschwartz.dailyflightbuddy.ui.GooeyMenu$CirclePoint { *; }
That's it.
btw. To see if proguard renames a method or not the file 'app/build/outputs/mapping/release/mapping.txt' is of great help (and self-explanatory).

Related

Must add reference to WindowsBase.dll to use RenderTargetBitmap.Render method?

I'm currently working on a WPF application that uses a plotting library called Live Charts for WPF. I want to save a PNG of my graph, which is described on their github page Save Plot Example also discussed at this stackoverflow question here. The problem is adding a reference to the windows base assembly.
`
private void SaveToPng(FrameworkElement visual, string filename)
{
var encoder = new PngBitmapEncoder();
EncodeVisual(visual, filename, encoder);
}
private static void EncodeVisual(FrameworkElement visual, string fileName, BitmapEncoder encoder)
{
var bitmap = new RenderTargetBitmap((int)visual.ActualWidth, (int)visual.ActualHeight, 96, 96, PixelFormats.Pbgra32);
//bitmap.Render();
bitmap.Render(visual);
var frame = BitmapFrame.Create(bitmap);
encoder.Frames.Add(frame);
using (var stream = File.Create(fileName)) encoder.Save(stream);
}
`
I have tried to add this dll as a reference which is located at C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.0, but when I do this it does not work. It is actually implicitly included in the project, so that may be why I can add it explicitly like I did with the PresentationCore.dll and PresentationFramework.dll which were also required and solved a few errors. The error states: the type 'System.Windows.Freezable' is defined in an assembly that is not referenced. You must add a reference to assembly 'WindowsBase, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. This is shown by hovering over the call to bitmap.Render(visual), and when hovering over encoder.Save(stream) as shown in the picture and in the above code. I believe resolving this dependency would fix the problem, but I cannot figure out how. Thank you.
Picture of Project
Discovered what I believe is the answer to the problem. I was creating the SaveToPNG and EncodeVisual methods inside of a class library which would be used in the WPF project. The class library is unable to accept WindowsBase as an explicit reference, but the WPF project itself can. It will take some restructuring of the code to implement this in the WPF project itself, but it seems to be the way to resolve this problem.
I am using .NET 6. Here is the contents of my csproj file in my class library:
<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="Current" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<PropertyGroup />
<ItemGroup>
<Compile Update="Core Library\Port.cs">
<SubType>Component</SubType>
</Compile>
</ItemGroup>
</Project>
I did not see the attributes that you spoke of, and autocomplete could not reference them in this file. Inside of the IDE (Rider) I was able to target net6.0-windows in the properties menu of the project. I then reinserted the code into the class library, but the same error still occurred. I agree with you that it shouldn't be necessary to reference WindowsBase, which isn't necessary when placing the code in the wpf project itself, but in the class library I also had to reference PresentationCore and PresentationFramework, which did take care of multiple errors.

Configuration file

I need to read some property from configuration file. I don't want to store the property file inside the location. What is best practice
For example, if execute as follows
java -jar payara-micro.jar --deploy demo.jar
I want to keep the parameter file where payara-micro.jar located. I need to read the property file inside the war file. How to achieve it.
Thank you.
You may first start payara-micro with --rootDir path option. Payara treats this dir as working, so it creates `config' dir there. Then just edit domain.xml file as you need and start payara-micro again. All resources you create will be available at you beans as usual. For example you may add some properties like this:
...
<resources>
<jdbc-resource pool-name="DerbyPool" jndi-name="jdbc/__default" object-type="system-all" />
<jdbc-connection-pool is-isolation-level-guaranteed="false" name="DerbyPool" datasource-classname="org.apache.derby.jdbc.EmbeddedDataSource" res-type="javax.sql.DataSource">
<property name="databaseName" value="${com.sun.aas.instanceRoot}/lib/databases/embedded_default" />
<property name="connectionAttributes" value=";create=true" />
</jdbc-connection-pool>
<connector-connection-pool max-pool-size="250" steady-pool-size="1" name="jms/__defaultConnectionFactory-Connection-Pool" resource-adapter-name="jmsra" connection-definition-name="javax.jms.ConnectionFactory"></connector-connection-pool>
<connector-resource pool-name="jms/__defaultConnectionFactory-Connection-Pool" jndi-name="jms/__defaultConnectionFactory" object-type="system-all-req"></connector-resource>
<context-service description="context service" jndi-name="concurrent/__defaultContextService" object-type="system-all"></context-service>
<managed-executor-service maximum-pool-size="200" core-pool-size="1" long-running-tasks="true" keep-alive-seconds="300" hung-after-seconds="300" task-queue-capacity="20000" jndi-name="concurrent/__defaultManagedExecutorService" object-type="system-all"></managed-executor-service>
<managed-scheduled-executor-service core-pool-size="1" long-running-tasks="true" keep-alive-seconds="300" hung-after-seconds="300" jndi-name="concurrent/__defaultManagedScheduledExecutorService" object-type="system-all"></managed-scheduled-executor-service>
<managed-thread-factory description="thread factory" jndi-name="concurrent/__defaultManagedThreadFactory" object-type="system-all"></managed-thread-factory>
<custom-resource factory-class="org.glassfish.resources.custom.factory.PropertiesFactory" res-type="java.util.Properties" jndi-name="myconf">
<property name="some.my.property" value="some.value"></property>
</custom-resource>
</resources>
(see custom-resource tag)
Then just inject it into you bean:
#Resource(type=java.util.Properties.class, name="myconf")
private final Properties parameters;
Also you may specify --domainConfig file to keep configuration anywhere you want.
Use --help to see full options list.
You can pass system properties to the payara micro using a command line argument, like this:
java -jar payara-micro.jar --deploy app.war --systemProperties=sys.properties
Also check out the Payara micro documentation about this option.
You can pass system properties configured in domain.xml file. This overrides the default domain.xml.
java -jar payara-micro.jar --domainConfig domain.xml --deploy app.war
You can get the default domain.xml from the payara-micro.jar

how to call testng.xml from java main method?

I have testng.xml file created.
Is there any way to run this file from java main method?
Something like -
Class test {
public static void main ( String [ ] args)
{
Run(testng.xml);
}
}
You can run testng directly from commandline, probably make a bat file on top of it or use jenkins to trigger it. Refer here
or
If you want it in main, then you can try
TestListenerAdapter tla = new TestListenerAdapter();
TestNG testng = new TestNG();
List<String> suites = Lists.newArrayList();
suites.add("c:/tests/testng1.xml");//path to xml..
suites.add("c:/tests/testng2.xml");
testng.setTestSuites(suites);
testng.run();
Please try below code and make sure you have testNG jar added in your jar manifest file.
public static void main(String[] args)
{
org.testng.TestNG.main(args);
}
now you can pass all the parameters to your jar which are same for testNG jar file.
e.g.
java -jar yourjar.jar testng.xml
or
java -jar yourjar.jar -testclass org.test.xyz.java
This work for me. More details here.
// Create object of TestNG Class
TestNG runner=new TestNG();
// Create a list of String
List<String> suitefiles=new ArrayList<String>();
// Add xml file which you have to execute
suitefiles.add("C:\\Automation Test\\Git\\vne_automation\\testng.xml");
// now set xml file for execution
runner.setTestSuites(suitefiles);
// finally execute the runner using run method
runner.run();
Hope this helps!
All the answers above works like a charm but there is one limitation that
it would run unless and untill you remove the scope tag in pom.xml
In pom.xml there would be maven dependancy for testNg and in there
there would be one scope tag which limits our jar to only upto test
Just remove that one
I didn't get any error and XML path is correct. But It just end execution with failed test cases. It does not open firefox browser.
I am using testng annotation (i.e. #Before Suite,#Test, #group etc ) inside classes whereas it successfully execute using Testng Suite in eclipse.
<!-- suite name="Example" parallel="methods" thread-count="2" parallel="false" preserve-order="true"> -->
<suite name="Example Donate System" verbose='1'>
<test name="Agency" >
<packages>
<package name="com.Donatesystem.AgencyController" />
</packages>
</test>
</suite>

Can I force the installer project to use the .config file from the built solution instead of the original one?

I am using the solution to this question in order to apply configuration changes to App.config in a Winforms project. I also have an installer project for the project that creates an installable *.msi file. The problem is, the config file bundled in the installers is the original, un-transformed config file. So we're not getting the production connection strings in the production installer even though the config file for the built winforms project has all the correct transformations applied.
Is there any way to force the installer project to use the output of project build?
First of all: it is impossible to make the Setup Project point to another app.config file by using the Primary output option. So my solution is going to be a work around. I hope you find it useful in your situation.
Overview:
The basic idea is:
Remove the forced app.config from the Setup Project;
Add a file pointing to the app.config, manually;
Use MSBuild to get into the vdproj file, and change it to match the real output of the transformed app.config.
Some drawbacks are:
The setup project only gets updated, if the project it deploys build. ahhh... not a real drawback!
You need MSBuild 4.0... this can also be worked around!
Need a custom Task, called FileUpdate... it is open source and has installer.
Lets Work:
1) Go to your Setup Project, and select the Primary Output object, right click and go to Properties. There you will find the Exclude Filter... add a filter for *.config, so it will remove the hard-coded app.config.
2) Right click your Setup Project in the Solution Explorer -> Add -> File... select any file that ends with .config.
3) Download MSBuild Community Tasks Project, I recomend the msi installer.
4) Unload your project (the csproj) and replace the code from the other question with this one:
Code:
<UsingTask TaskName="TransformXml" AssemblyFile="$(MSBuildExtensionsPath)\Microsoft\VisualStudio\v10.0\Web\Microsoft.Web.Publishing.Tasks.dll" />
<Import Project="$(MSBuildExtensionsPath)\MSBuildCommunityTasks\MSBuild.Community.Tasks.Targets" />
<Target Name="AfterCompile" Condition="exists('app.$(Configuration).config')">
<!-- Generate transformed app config in the intermediate directory -->
<TransformXml Source="app.config" Destination="$(IntermediateOutputPath)$(TargetFileName).config" Transform="app.$(Configuration).config" />
<!-- Force build process to use the transformed configuration file from now on. -->
<ItemGroup>
<AppConfigWithTargetPath Remove="app.config" />
<AppConfigWithTargetPath Include="$(IntermediateOutputPath)$(TargetFileName).config">
<TargetPath>$(TargetFileName).config</TargetPath>
</AppConfigWithTargetPath>
</ItemGroup>
<PropertyGroup>
<SetupProjectPath>$(MSBuildProjectDirectory)\$(IntermediateOutputPath)$(TargetFileName).config</SetupProjectPath>
</PropertyGroup>
<!-- Change the following so that this Task can find your vdproj file -->
<FileUpdate Files="$(MSBuildProjectDirectory)\..\Setup1\Setup1.vdproj"
Regex="(.SourcePath. = .8:).*\.config(.)"
ReplacementText="$1$(SetupProjectPath.Replace(`\`,`\\`))$2" />
<FileUpdate Files="$(MSBuildProjectDirectory)\..\Setup1\Setup1.vdproj"
Regex="(.TargetName. = .8:).*\.config(.)"
ReplacementText="$1$(TargetFileName).config$2" />
</Target>
5) The previous code must be changed, so that it can find your vdproj file. I have placed a comment in the code, indicating where you need to make the change.
Now, everytime you build your main project, the MSBuild will change the Setup project, so that it uses the correct app.config file. It may have drawbacks, but this solution can be polished and become better. If you need leave a comment, and I'll try to respond ASAP.
Resources I Used
MSBuild 4.0 is needed because I need to use String's Replace function, to replace single "\" to double "\" in the path. See
MSBuild Property Functions for details about using function in MSBuild.
I learned about the FileUpdate Task in this other question. The official project is MSBuild Community Tasks Project.
These two topics were important to my findings:
Trying to include configuration specific app.config files in a setup project
Problems with setup project - am I thick?
Another solution I've found is not to use the transformations but just have a separate config file, e.g. app.Release.config. Then add this line to your csproj file.
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|x86' ">
<AppConfig>App.Release.config</AppConfig>
</PropertyGroup>
This will force the deployment project to use the correct config file when packaging.
I combined the best of the following answers to get a fully working solution without using any external tools at all:
1. Setup App.Config transformations
Source: https://stackoverflow.com/a/5109530
In short:
Manually add additional .config files for each build configuration and edit the raw project file to include them similar to this:
<Content Include="App.config" />
<Content Include="App.Debug.config" >
<DependentUpon>App.config</DependentUpon>
</Content>
<Content Include="App.Release.config" >
<DependentUpon>App.config</DependentUpon>
</Content>
Then include the following XML at the end of the project file, just before the closing </project> tag:
<UsingTask TaskName="TransformXml" AssemblyFile="$(MSBuildExtensionsPath)\Microsoft\VisualStudio\v$(VisualStudioVersion)\Web\Microsoft.Web.Publishing.Tasks.dll" />
<Target Name="AfterCompile" Condition="exists('app.$(Configuration).config')">
<TransformXml Source="app.config" Destination="$(IntermediateOutputPath)$(TargetFileName).config" Transform="app.$(Configuration).config" />
<ItemGroup>
<AppConfigWithTargetPath Remove="app.config" />
<AppConfigWithTargetPath Include="$(IntermediateOutputPath)$(TargetFileName).config">
<TargetPath>$(TargetFileName).config</TargetPath>
</AppConfigWithTargetPath>
</ItemGroup>
</Target>
Finally edit the additional .config files to include the respective transformations for each build configuration:
<?xml version="1.0" encoding="utf-8"?>
<configuration xmlns:xdt="http://schemas.microsoft.com/XML-Document-Transform">
<!-- transformations here-->
</configuration>
2. Include the appropriate .config in the setup project
First, add a command in the postbuild event of your main project to move the appropriate transformed .config file to a neutral location (e.g. the main bin\ directory):
copy /y "$(TargetDir)$(TargetFileName).config" "$(ProjectDir)bin\$(TargetFileName).config"
(Source: https://stackoverflow.com/a/26521986)
Open the setup project and click the "Primary output..." node to display the properties window. There, add an ExludeFilter "*.config" to exclude the default (untransformed) .config file.
(Source: https://stackoverflow.com/a/6908477)
Finally add the transformed .config file (from the postbuild event) to the setup project (Add > File).
Done.
You can now freely add build configurations and corresponding config transforms and your setup project will always include the appropriate .config for the active configuration.
I accomplished this in a different manner with no external tools:
I added a post-build event that copied the target files to a 'neutral' directory (the root of the /bin folder in the project) and then added this file to the .vdproj. The deployment project now picks up whatever the latest built version is:
Post Build Command:
copy /y "$(TargetDir)$(TargetFileName).config" "$(ProjectDir)bin\$(TargetFileName).config"
This worked for what I needed without any external tools, and works nicely with SlowCheetah transformations.
Based off Alec's answer, here is a similar element that you can use along with the transformations and still get their full benefit:
<ItemGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
<Content Include="$(OutputPath)$(AssemblyName).dll.config">
<InProject>false</InProject>
<Link>$(AssemblyName).dll.config</Link>
</Content>
</ItemGroup>
This way, you can use the SlowCheetah transforms or the built-in ones to transform your .config file, and then go into your Visual Studio Deployment Project (or other) and include the Content from the affected project in your Add -> Project Output... page easily, with minimal changes.
None of the above solutions or any articles worked for me in deployment/setup project. Spent many days to figure out the right solution. Finally this approach worked for me.
Pre requisites
I've used utility called cct.exe to transform file explicitly. You can download from here
http://ctt.codeplex.com/
I've used custom installer in setup project to capture installation events.
Follow these steps to achieve app config transformation
1) Add your desired config files to your project and modify your .csproj file like these
<Content Include="app.uat.config">
<DependentUpon>app.config</DependentUpon>
</Content>
<Content Include="app.training.config">
<DependentUpon>app.config</DependentUpon>
</Content>
<Content Include="app.live.config">
<DependentUpon>app.config</DependentUpon>
</Content>
I've added them as content so that they can be copied to output directory.
2) Add cct.exe to your project which you downloaded.
3) Add custom installer to your project which should look like this
[RunInstaller(true)]
public partial class CustomInstaller : System.Configuration.Install.Installer
{
string currentLocation = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
string[] transformationfiles = Directory.GetFiles(Path.GetDirectoryNam(Assembly.GetExecutingAssembly().Location), "app.*.config");
public CustomInstaller()
{
InitializeComponent();
// Attach the 'Committed' event.
this.Committed += new InstallEventHandler(MyInstaller_Committed);
this.AfterInstall += new InstallEventHandler(CustomInstaller_AfterInstall);
}
void CustomInstaller_AfterInstall(object sender, InstallEventArgs e)
{
try
{
Directory.SetCurrentDirectory(currentLocation);
var environment = Context.Parameters["Environment"];
var currentconfig = transformationfiles.Where(x => x.Contains(environment)).First();
if (currentconfig != null)
{
FileInfo finfo = new FileInfo(currentconfig);
if (finfo != null)
{
var commands = string.Format(#"/C ctt.exe s:yourexename.exe.config t:{0} d:yourexename.exe.config ", finfo.Name);
using (System.Diagnostics.Process execute = new System.Diagnostics.Process())
{
execute.StartInfo.FileName = "cmd.exe";
execute.StartInfo.RedirectStandardError = true;
execute.StartInfo.RedirectStandardInput = true;
execute.StartInfo.RedirectStandardOutput = true;
execute.StartInfo.UseShellExecute = false;
execute.StartInfo.CreateNoWindow = true;
execute.StartInfo.Arguments = commands;
execute.Start();
}
}
}
}
catch
{
// Do nothing...
}
}
// Event handler for 'Committed' event.
private void MyInstaller_Committed(object sender, InstallEventArgs e)
{
XmlDocument doc = new XmlDocument();
var execonfigPath = currentLocation + #"\yourexe.exe.config";
var file = File.OpenText(execonfigPath);
var xml = file.ReadToEnd();
file.Close();
doc.LoadXml(FormatXmlString(xml));
doc.Save(execonfigPath);
foreach (var filename in transformationfiles)
File.Delete(filename);
}
private static string FormatXmlString(string xmlString)
{
System.Xml.Linq.XElement element = System.Xml.Linq.XElement.Parse(xmlString);
return element.ToString();
}
}
Here I am using two event handlers CustomInstaller_AfterInstall in which I am loading correct config file and transforming .
In MyInstaller_Committed I am deleting transformation files which we don't need on client machine once we apply has been applied. I am also indenting transformed file because cct simply transforms elements were aligned ugly.
4) Open your setup project and add project output content file so that setup can copy config files like app.uat.config,app.live.config etc into client machine.
In previous step this snippet will load all available config files but we need supply right transform file
string[] transformationfiles = Directory.GetFiles(Path.GetDirectoryNam
(Assembly.GetExecutingAssembly().Location), "app.*.config");
For that I've added UI dialog on setup project to get the current config. The dialog gives options for user to select environment like "Live" "UAT" "Test" etc .
Now pass the selected environment to your custom installer and filter them.
It will become lengthy article if I explain on how to add dialog,how to set up params etc so please google them. But idea is to transform user selected environment.
The advantage of this approach is you can use same setup file for any environment.
Here is the summary:
Add config files
Add cct exe file
Add custom installer
Apply transformation on exe.config under after install event
Delete transformation files from client's machine
Modify setup project in such a way that
set up should copy all config files(project output content) and cct.exe into output directory
configure UI dialog with radio buttons (Test,Live,UAT..)
pass the selected value to custom installer
Solution might look lengthy but have no choice because MSI always copy app.config and doesn't care about project build events and transformations. slowcheetah works only with clickonce not setup project
The question is old, but the following could still help many folks out there.
I would simply use Wix WiFile.exe to replace the concerned file in the msi this way (for the sake of this example, we call your msi yourPackage.msi):
Step 1. From command prompt run: WiFile.exe "yourPackage.msi" /x "app.exe.config."
The above will extract the "wrong" app.exe.config file from the msi and place it the same directory as your msi;
Step 2. Place the new (prod) config file (must have the same name as the extracted file: app.exe.config) in same location as your msi;
This means that you are overwritting the app.exe.config that has just been extracted in step 1 above, with your new (production config file);
Step 3. From command prompt run: WiFile.exe "yourPackage.msi" /u "app.exe.config."
THAT'S ALL!
The above can be done in a few seconds. You could automate the task if you wanted, for instance, by running it as batch or else.
After running step 3 above, your msi will contain the new config file, which will now be installed at your clients' when they run the setup.

Generate and download file with jboss seam

I need to add an 'export' function to an existing web app using seam. The purpose is to export search results to a csv file. I have no problem generating a csv, but I do not know how the send the csv back to the user.
I do not want to store the csv on the server because that would be waisted storage space. How could I achieve this in jboss seam?
Use the Document Store Servlet provided by Seam.
Almost copying and pasting from the reference doc, declare the servlet in web.xml like this:
<servlet>
<servlet-name>Document Store Servlet</servlet-name>
<servlet-class>org.jboss.seam.document.DocumentStoreServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Document Store Servlet</servlet-name>
<url-pattern>/seam/docstore/*</url-pattern>
</servlet-mapping>
Then create a export.xhtml file with only <s:resource> tag:
<s:resource xmlns="http://www.w3.org/1999/xhtml"
xmlns:s="http://jboss.com/products/seam/taglib"
data="#{myComponent.csvData}"
contentType="application/vnd.ms-excel"
fileName="#{myComponent.csvFileName}"/>
Generate link for downloading the file in your page with <s:download>:
<s:download src="/csv/export.xhtml">
<h:outputText value="Download CSV"/>
<f:param name="param1" value="somevalue"/>
<f:param name="param2" value="someOtherValue"/>
</s:download>
Finally, implement getCsvData() and getCsvFileName() methods in your component:
// could be byte[], File or InputStream
public InputStream getCsvData() {
// generate data to be downloaded
}
public String getCsvFileName() {
return "myfile.csv";
}
Note that <s:download> propagates conversation (unless you set propagation=none). If you propagate the conversation context probably you won't need to pass any parameter. For large data set it may be preferable to not propagate the conversation and pass parameter to select the data in a request scoped component.
There's a couple of ways:
1) Check the Seam docs for info on using Seam-Excel to programmatically generate your file and then write it out using a mime-type set for CSV - this is all detailed in the docs.
However, I could not get this to work in the latest version of Seam, as it requires a response object, which used to be available from the Seam context but now only returns null.
2) Code the CSV file you want as an Excel xhtml template (see the Seam docs and example projects) and simply render this as normal using an tag.
I do this regularly and it works well, bar the restriction that you cannot supply a filename.
HTH.

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