I am having a piece of visual C++ code (firebreath) that retrieves data from a visual C# application. The communication works fine for negative cases(returns value without out parameter) but in positive case(returns value with out parameter) the following error is shown.
Error: Error calling method on NPObject!
I guess the problem is in the out parameter of Visual C# application. Can anyone help me in this?? Kindly use the below code for reference.
ngContent.js: (js to call firebreath function)
function GetDetails(param1, param2) {
try {
return document.getElementById("nGCall").ReturnDetails(param1, param2);
}
catch (e) {
alert("Exception Occured " + e.message);
}
};
nGAPI.cpp: (Firebreath function to call C# application)
FB::VariantList nGAPI::ReturnDetails(std::wstring& param1, std::wstring& param2)
{
try {
InetGuardNPAPI *CSharpInterface = NULL;
//Open interface to C#
CoInitialize(NULL);
HRESULT hr = CoCreateInstance(CLSID_netGuardIEBHO, NULL, CLSCTX_INPROC_SERVER, IID_InetGuardNPAPI, reinterpret_cast<void**>(&CSharpInterface));
BSTR out1= NULL;
BSTR out2= NULL;
BSTR out3= NULL;
BSTR out4= NULL;
int returns = CSharpInterface->NPGetDetails(param1.c_str(), param2.c_str(), &out1, &out2, &out3, &out4);
if (out1 != NULL && out2 != NULL) {
return FB::variant_list_of(out1)(out2)(out3)(out4);
} else {
return FB::variant_list_of();
}
} catch (...) {
MessageBoxW(NULL, L"Exception occured.", L"NG", NULL);
return FB::variant_list_of();
}
nGHost.cs: (Visual C# application)
public int NPGetDetails(string param1, string param2, out string out1, out string out2, out string out3, out string out4)
{
int retValue = 0;
out1 = null;
out2 = null;
out3 = null;
out4 = null;
bool userIdentified = IdentifyUser(ngDB, out ngdata);
if (!userIdentified)
return retValue;
try {
out1 = ngdata.abc;
out2 = ngdata.def;
out3 = ngdata.ghi;
out4 = ngdata.jkl;
retValue = 1;
} catch (Exception ex) {
MessageBox.Show(ex.Message);
}
return retValue;
}
Thanks in advance.
The error you're getting indicates that an exception was thrown. Unfortunately the browsers stopped exposing exceptions when they switched to out of process plugins. I'd recommend attaching a debugger and stepping through to see what is actually happening; alternately, add some logging.
Related
My Java code should return user login as a String, but on Javascript side I'm receiving a strange Resource object whose numbered attributes each contains one char.
Here is my Java code:
#PostMapping(path = "/account/reset_password/finish", produces = MediaType.TEXT_PLAIN_VALUE)
#Timed
public ResponseEntity<String> finishPasswordReset(#RequestBody KeyAndPasswordVM keyAndPassword) {
if (!checkPasswordLength(keyAndPassword.getNewPassword())) {
return new ResponseEntity<>("Incorrect password", HttpStatus.BAD_REQUEST);
}
return userService.completePasswordReset(keyAndPassword.getNewPassword(), keyAndPassword.getKey()).map(
user -> new ResponseEntity<String>(user.getLogin(), HttpStatus.OK)).orElse(
new ResponseEntity<>(HttpStatus.INTERNAL_SERVER_ERROR));
}
Javascript controller code:
Auth.resetPasswordFinish({key: $stateParams.key, newPassword: vm.resetAccount.password}).then(function (userLogin) {
vm.success = 'OK';
console.log("userLogin="+userLogin);
}).catch(function () {
vm.success = null;
vm.error = 'ERROR';
});
The console prints:
userLogin=[object Object]
which is not very interesting.
Inspecting the received object gives:
One can see that each char of the String is a numbered attribute of the Resource object.
Javascript Auth code:
function resetPasswordFinish (keyAndPassword, callback) {
var cb = callback || angular.noop;
return PasswordResetFinish.save(keyAndPassword, function (userLogin) {
return cb(userLogin);
}, function (err) {
return cb(err);
}).$promise;
}
This one is just passing the parameter to the callback function.
Do you know how to receive a plain String instead of this Resource object? I apologize if this is a trivial question.
I know that doing this will work in order to retrieve the user login:
var i = 0;
var userLoginToString = "";
while (typeof userLogin[String(i)] !== 'undefined') {
userLoginToString += String(userLogin[String(i)]);
i += 1;
}
however I don't think that this is the intended way to use this Resource object.
Im not to sure what I'm doing wrong. In my app I'm trying to have it remember a previous password entered into the textfield on submit. From research done using shared preferences saving the variable even if the app it restarted. Top of my code:
public class AK_Voucher_access extends BT_fragment{
View thisScreensView = null;
String errormessage = "";
String errormessageTextColor = "";
String errormessageText = "";
String rememberTextText = "";
String rememberTextTextColor = "";
String voucherTextfieldPlaceholder = "";
String voucherTextfieldSecureTextEntry = "";
boolean voucherTextfieldSecureTextEntryBool = false;
String iphoneImage = "";
String ipadImage = "";
String errormessageInvalid = "";
String errormessageRemember = "";
private TextView errormessageTextView = null;
private EditText voucherTextfieldEditText = null;
private ImageView imageView = null;
private Button submitButton = null;
private Switch rememberSwitch = null;
private Drawable myHeaderImageDrawable = null;
private String alphaImage = "", pass;
private static BT_item screenObjectToLoad = null;
private static final String PASSVALUE = "value";
//private static final String appPassword = "appPassword";
Context context;
To retrieve textfield when set:
if (rememberSwitch.isChecked()) {
BT_debugger.showIt(fragmentName + ":rememberSwitch is ON");
SharedPreferences settings = context.getSharedPreferences(PASSVALUE, MODE_PRIVATE);
String rpass= settings.getString("rpassword","");
if (rpass!=null) {
voucherTextfieldEditText.setText(rpass);
} else {
voucherTextfieldEditText.setText("nono");
}
}
else {
BT_debugger.showIt(fragmentName + ":rememberSwitch is OFF");
// switchStatus.setText("Switch is currently OFF");
}
Then my code to save the String on submit:
if (loadScreenNickname.length() > 1 && !loadScreenNickname.equalsIgnoreCase("none")) {
// before we launch the next screen...
if (!rememberSwitch.isChecked()) {
voucherTextfieldEditText.setText("");
}
if (rememberSwitch.isChecked()){
//voucherTextfieldEditText.setText("");
String pass = voucherTextfieldEditText.getText().toString();
BT_debugger.showIt(pass + ":CODE");
SharedPreferences settings = context.getSharedPreferences(PASSVALUE, MODE_PRIVATE);
settings.edit().putString("rpassword", pass).apply();
rememberSwitch.setChecked(true);
}
errormessageTextView.setVisibility(View.GONE);
errormessageTextView.invalidate();
//loadScreenObject(null, thisScreen);
try {
loadScreenWithNickname(loadScreenNickname);
foundIt = 1;
} catch (Exception ex){
Log.e ("eTutorPrism Error", "Caught this exception " + ex);
ex.printStackTrace();
}
break;
}
}
However overtime I run the plugin within my app I receive this error in the logcat:
E/UncaughtException: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.SharedPreferences android.content.Context.getSharedPreferences(java.lang.String, int)' on a null object reference
at com.asfapp.ui.bt_plugins.AK_Voucher_access.onCreateView(AK_Voucher_access.java:210)
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.asfapp, PID: 24771
java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.SharedPreferences android.content.Context.getSharedPreferences(java.lang.String, int)' on a null object reference
at com.asfapp.ui.bt_plugins.AK_Voucher_access.onCreateView(AK_Voucher_access.java:210)
Not to sure whats wrong with the code this time but anything should help.
use this code to get SharedPreference in fragment
SharedPreferences preferences = this.getActivity().getSharedPreferences("myPref", Context.MODE_PRIVATE);
do you define the context?
Context context;
i didnt see the value of context here.
maybe this is the reason why its return NullPointerException
you should define it with activity or context.
And you can also do this instead make context var:
getApplicationContext().getSharedPreferences()
Or
getActivity().getSharedPreferences()
try
Context context = getApplicationContext();
SharedPreferences settings = context.getSharedPreferences(PASSVALUE, context.MODE_PRIVATE);
You're getting NullPointerException because context is undefined. Either define it before calling your context.getSharedPreference() or use another way such as getApplicationContext().getSharedPreference() .
I implemented the WKScriptMessageHandler protocol and I have defined the userContentController(:didReceiveScriptMessage:) method.
When there is a error in the Javascript, I get (in the WKScriptMessage object) something not really useful like:
{
col = 0;
file = "";
line = 0;
message = "Script error.";
type = error;
}
On the other hand, if I open the Safari Web Inspector, I can see the real error which is (for instance):
TypeError: FW.Ui.Modal.sho is not a function. (In 'FW.Ui.Modal.sho', 'FW.Ui.Modal.sho' is undefined)
Is there a way to get that error back in my native code?
EDIT:
Just to clarify, the javascript code is written by a javascript developer (who doesn't have access to the native source code, so he can't debug the app via Xcode). The code he writes it's then pushed to the iOS app (downloaded from an enterprise app store).
You can wrap the expression in a try catch block before evaluating it. Then have the JavaScript return the error message if it fails. Here is an example taken from the Turbolinks-iOS adapter, available on GitHub.
extension WKWebView {
func callJavaScriptFunction(functionExpression: String, withArguments arguments: [AnyObject?] = [], completionHandler: ((AnyObject?) -> ())? = nil) {
guard let script = scriptForCallingJavaScriptFunction(functionExpression, withArguments: arguments) else {
NSLog("Error encoding arguments for JavaScript function `%#'", functionExpression)
return
}
evaluateJavaScript(script) { (result, error) in
if let result = result as? [String: AnyObject] {
if let error = result["error"] as? String, stack = result["stack"] as? String {
NSLog("Error evaluating JavaScript function `%#': %#\n%#", functionExpression, error, stack)
} else {
completionHandler?(result["value"])
}
} else if let error = error {
self.delegate?.webView(self, didFailJavaScriptEvaluationWithError: error)
}
}
}
private func scriptForCallingJavaScriptFunction(functionExpression: String, withArguments arguments: [AnyObject?]) -> String? {
guard let encodedArguments = encodeJavaScriptArguments(arguments) else { return nil }
return
"(function(result) {\n" +
" try {\n" +
" result.value = " + functionExpression + "(" + encodedArguments + ")\n" +
" } catch (error) {\n" +
" result.error = error.toString()\n" +
" result.stack = error.stack\n" +
" }\n" +
" return result\n" +
"})({})"
}
private func encodeJavaScriptArguments(arguments: [AnyObject?]) -> String? {
let arguments = arguments.map { $0 == nil ? NSNull() : $0! }
if let data = try? NSJSONSerialization.dataWithJSONObject(arguments, options: []),
string = NSString(data: data, encoding: NSUTF8StringEncoding) as? String {
return string[string.startIndex.successor() ..< string.endIndex.predecessor()]
}
return nil
}
}
I'm developing a game on cordova that uses facebook integration. I have a facebook game canvas running on a secure site.
The friend request works fine on the web site version (returns more than 25 results, as I'm iterating the paging.next url that is also returned).
However, on the cordova build (android) it only ever returns the first result set of 25. It does still have the page.next url JSON field but it just returns a response object with a type=website.
Has anyone else come across this?
After quite a lot of digging I found an issue with the way requests are handled in the FacebookLib for Android. The current version of the com.phonegap.plugins.facebookconnect plugin uses Android FacebookSDK 3.21.1 so I'm not sure if this will still be an issue with v4.
A graph result with a paging url is used to request the next page however using the entire url, which includes the https://graph.facebook.com/ as well as the usual graphAction causes an incorrect result set to be returned. However I determined that if you remove the schema and host parts it will be correct.
I modified the ConnectPlugin.java to check that any schema and host is removed from the graphAction. Seems to work well now.
ConnectPlugin.java before:
private void makeGraphCall() {
Session session = Session.getActiveSession();
Request.Callback graphCallback = new Request.Callback() {
#Override
public void onCompleted(Response response) {
if (graphContext != null) {
if (response.getError() != null) {
graphContext.error(getFacebookRequestErrorResponse(response.getError()));
} else {
GraphObject graphObject = response.getGraphObject();
JSONObject innerObject = graphObject.getInnerJSONObject();
graphContext.success(innerObject);
}
graphPath = null;
graphContext = null;
}
}
};
//If you're using the paging URLs they will be URLEncoded, let's decode them.
try {
graphPath = URLDecoder.decode(graphPath, "UTF-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
String[] urlParts = graphPath.split("\\?");
String graphAction = urlParts[0];
Request graphRequest = Request.newGraphPathRequest(null, graphAction, graphCallback);
Bundle params = graphRequest.getParameters();
if (urlParts.length > 1) {
String[] queries = urlParts[1].split("&");
for (String query : queries) {
int splitPoint = query.indexOf("=");
if (splitPoint > 0) {
String key = query.substring(0, splitPoint);
String value = query.substring(splitPoint + 1, query.length());
params.putString(key, value);
if (key.equals("access_token")) {
if (value.equals(session.getAccessToken())) {
Log.d(TAG, "access_token URL: " + value);
Log.d(TAG, "access_token SESSION: " + session.getAccessToken());
}
}
}
}
}
params.putString("access_token", session.getAccessToken());
graphRequest.setParameters(params);
graphRequest.executeAsync();
}
ConnectPlugin.java after:
private void makeGraphCall() {
Session session = Session.getActiveSession();
Request.Callback graphCallback = new Request.Callback() {
#Override
public void onCompleted(Response response) {
if (graphContext != null) {
if (response.getError() != null) {
graphContext.error(getFacebookRequestErrorResponse(response.getError()));
} else {
GraphObject graphObject = response.getGraphObject();
JSONObject innerObject = graphObject.getInnerJSONObject();
graphContext.success(innerObject);
}
graphPath = null;
graphContext = null;
}
}
};
//If you're using the paging URLs they will be URLEncoded, let's decode them.
try {
graphPath = URLDecoder.decode(graphPath, "UTF-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
String[] urlParts = graphPath.split("\\?");
String graphAction = urlParts[0];
///////////////////////
// SECTION ADDED
///////////////////////
final String GRAPH_BASE_URL = "https://graph.facebook.com/";
if(graphAction.indexOf(GRAPH_BASE_URL)==0) {
URL graphUrl = null;
try {
graphUrl = new URL(graphAction);
} catch (MalformedURLException e) {
e.printStackTrace();
}
graphAction = graphUrl.getPath();
}
///////////////////////
// END SECTION ADDED
///////////////////////
Request graphRequest = Request.newGraphPathRequest(null, graphAction, graphCallback);
Bundle params = graphRequest.getParameters();
if (urlParts.length > 1) {
String[] queries = urlParts[1].split("&");
for (String query : queries) {
int splitPoint = query.indexOf("=");
if (splitPoint > 0) {
String key = query.substring(0, splitPoint);
String value = query.substring(splitPoint + 1, query.length());
params.putString(key, value);
if (key.equals("access_token")) {
if (value.equals(session.getAccessToken())) {
Log.d(TAG, "access_token URL: " + value);
Log.d(TAG, "access_token SESSION: " + session.getAccessToken());
}
}
}
}
}
params.putString("access_token", session.getAccessToken());
graphRequest.setParameters(params);
graphRequest.executeAsync();
}
There's no way to know that you call their api from cordova vs website, so it's some problem on your side, maybe you use some different implementation of the api on corodva and website, so that cordova sends a pagination request or send to other api version which does pagination.
everyone.
I'm get some trouble in ActiveX programming with ATL. I try to make a activex which can async-download files from http server to local folder and after download it will invoke javascript callback function.
My solution: run a thread M to monitor download thread D, when D is finish the job, M is going to terminal themself and invoke IDispatch inferface to call javascript function.
**************** THERE IS MY CODE: ****************
/* javascript code */
funciton download() {
var xfm = new ActiveXObject("XFileMngr.FileManager.1");
xfm.download(
'http://somedomain/somefile','localdev:\\folder\localfile',function(msg){alert(msg);});
}
/* C++ code */
// main routine
STDMETHODIMP CFileManager::download(BSTR url, BSTR local, VARIANT scriptCallback)
{
CString csURL(url);
CString csLocal(local);
CAsyncDownload download;
download.Download(this, csURL, csLocal, scriptCallback);
return S_OK;
}
// parts of CAsyncDownload.h
typedef struct tagThreadData {
CAsyncDownload* pThis;
} THREAD_DATA, *LPTHREAD_DATA;
class CAsyncDownload :
public IBindStatusCallback
{
private:
LPUNKNOWN pcaller;
CString csRemoteFile;
CString csLocalFile;
CComPtr<IDispatch> spCallback;
public:
void onDone(HRESULT hr);
HRESULT Download(LPUNKNOWN caller, CString& csRemote, CString& csLocal, VARIANT callback);
static DWORD __stdcall ThreadProc(void* param);
};
// parts of CAsyncDownload.cpp
void CAsyncDownload::onDone(HRESULT hr) {
if(spCallback) {
TRACE(TEXT("invoke callback function\n"));
CComVariant vParams[1];
vParams[0] = "callback is working!";
DISPPARAMS params = { vParams, NULL, 1, 0 };
HRESULT hr = spCallback->Invoke(0,
IID_NULL,
LOCALE_USER_DEFAULT,
DISPATCH_METHOD,
¶ms, NULL, NULL, NULL);
if(FAILED(hr)) {
CString csBuffer;
csBuffer.Format(TEXT("invoke failed, result value: %d \n"),hr);
TRACE(csBuffer);
}else {
TRACE(TEXT("invoke was successful\n"));
}
}
}
HRESULT CAsyncDownload::Download(LPUNKNOWN caller, CString& csRemote, CString& csLocal, VARIANT callback) {
CoInitializeEx(NULL, COINIT_MULTITHREADED);
csRemoteFile = csRemote;
csLocalFile = csLocal;
pcaller = caller;
switch(callback.vt){
case VT_DISPATCH:
case VT_VARIANT:{
spCallback = callback.pdispVal;
}
break;
default:{
spCallback = NULL;
}
}
LPTHREAD_DATA pData = new THREAD_DATA;
pData->pThis = this;
// create monitor thread M
HANDLE hThread = CreateThread(NULL, 0, ThreadProc, (void*)(pData), 0, NULL);
if(!hThread) {
delete pData;
return HRESULT_FROM_WIN32(GetLastError());
}
WaitForSingleObject(hThread, INFINITE);
CloseHandle(hThread);
CoUninitialize();
return S_OK;
}
DWORD __stdcall CAsyncDownload::ThreadProc(void* param) {
LPTHREAD_DATA pData = (LPTHREAD_DATA)param;
// here, we will create http download thread D
// when download job is finish, call onDone method;
pData->pThis->onDone(S_OK);
delete pData;
return 0;
}
**************** CODE FINISH ****************
OK, above is parts of my source code, if I call onDone method in sub-thread,
I will get OLE ERROR(-2147418113 (8000FFFF) Catastrophic failure.).
Did I miss something? please help me to figure it out.
IE's JavaScript engine is single-threaded and so is ATL's event raising code. Have the subthread post a message to the thread in which the ActiveX is created (e.g. to the handle of the ActiceX window if there is one), then raise the event.