if i run my code in mozilla firefox after i click scan in UI select source window is opened and then it crashed.
bt the same code if i run on chrome it scan the image in the scanner after that if i click the scan on the new window it scan properly and crashed during file transfer and chrome tell a error message "a plugin (shockwave flash) isnt responding "
what may be the prob
function onScan(no_of_pages)
{
if (DWObject)
{
if (DWObject.SourceCount > 0)
{
DWObject.SelectSource();
DWObject.IfDisableSourceAfterAcquire = true;
DWObject.AcquireImage();
DWObject.MaxImagesInBuffer = no_of_pages;
}
else
alert("No TWAIN compatible drivers detected.");
}
}
function Dynamsoft_ChangeConfig(config){
config.onPrintMsg = g_DWT_PrintMsg;
}
function g_DWT_PrintMsg(strMessage) {
alert(strMessage);
}
function OnPostTransferCallback()
{
try{
if(DWObject.MaxImagesInBuffer == DWObject.HowManyImagesInBuffer)
{
DWObject.CloseSource();
sendToFlash() ;
}else
{
//TBD
}
}catch(err){
alert(err.message);
}
}
//Call back function from the
function sendToFlash()
{
try{
var flashMovie = window.document.flashContent;
flashMovie.sendToActionScript(DWObject.HowManyImagesInBuffer);
//document.getElementById("ICANSWF").sendToActionScript();
}catch(err){
alert(err.message);
}
}
//call from flash for uploading documents
function onUpload(serialNo)
{
//alert("upload the file");
var imageArr = new Array();
try{
var imageName;
var uploadPage;
var serverHost;
var CurrentPathName = unescape(location.pathname); // get current PathName in plain ASCII
var CurrentPath = CurrentPathName.substring(0, CurrentPathName.lastIndexOf("/") + 1);
uploadPage = CurrentPath+"TempUpload.php";
//uploadPage = CurrentPath+"UploadDocument.php";
//serverHost = "blabla";
//window.Plugin.HTTPPort =1451;
serverHost = "our host";
DWObject.HTTPPort = 80;
DWObject.IfSSL = false;
//alert(Plugin.HowManyImagesInBuffer);
for(var i=0;i < DWObject.HowManyImagesInBuffer;i++)
{
imageName = serialNo+"_"+(i+1)+".png";
DWObject.HTTPUploadThroughPost(serverHost,i,uploadPage,imageName);
if (DWObject.ErrorCode == 0)
{
//alert(imageName);
imageArr.push({"label":imageName,"source":"http://"+serverHost+":"+DWObject.HTTPPort+"/icanindonesia/AppData/Temp/"+imageName}); //Push image name and location in an array
}
else //succeded
{
alert(DWObject.ErrorString);
//imageArr[i] = imageName;
//alert(imageArr[i]);
}
}
}catch(err){
//alert("onUpload");
alert(err.message);
}
console.log(imageArr);
return imageArr;
}
function startDownload(url)
{
//var url='.zip';
window.open(url,'Download');
}
function openDocument(url){
window.open(url, '_blank',"ican image viewer");
}
#priya, this is Rachel from Dynamsoft.Thanks for using our Dynamic Web TWAIN SDK. Which version of Firefox and Chrome are you using? We now also have newer version of Dynamic Web TWAIN which you may try. Please contact our support team to get better help.
Related
I need to check current version of Installed Application and Playstore application version. If it is not same app should navigate to Playstore .
im using xam.Plugin.LatestVersion(2.1.0) To get the latestversion number of application from play console. unfortunately not getting latest version number of application from play store. The below code im using.
private async void ChekAppVersion()
{
try
{
latestVersionNumber = await CrossLatestVersion.Current.GetLatestVersionNumber();
installedVersionNumber = CrossLatestVersion.Current.InstalledVersionNumber;
if (installedVersionNumber != latestVersionNumber)
{
await DisplayAlert("New Version", "There is a new version of this app available. Please update now?", "Ok");
await CrossLatestVersion.Current.OpenAppInStore();
ChekAppVersion();
}
else
{
}
}
catch (Exception ex)
{
}
}
Im getting the installedVersionNumber, but im unable to get the latestVersionNumber(Playstore).
Please help on this.
They have removed the version from div, now it's displayed with js, but data is still there inside a <script> tag. My current fixed code is:
private bool _lockCheckUpdates;
public async Task<bool> CheckNeedUpdate()
{
if (Connectivity.NetworkAccess != NetworkAccess.Internet || _lockCheckUpdates)
return false;
_lockCheckUpdates = true;
try
{
HttpClient myClient = CreateClient();
if (Device.RuntimePlatform == Device.Android)
{
var bundle = "com.todo.app"; //ANDROID BUNDLE NAME HERE
string url = $"https://play.google.com/store/apps/details?id={bundle}&hl=en";
string raw = await myClient.GetStringAsync(new Uri(url));
var doc = new HtmlDocument();
doc.LoadHtml(raw);
var scripts = doc.DocumentNode.Descendants()
.Where(n => n.Name == "script" && n.InnerText.Contains("AF_initDataCallback({key: 'ds:4'"))
.ToArray();
var script = scripts.First().InnerText;
var engine = new Jurassic.ScriptEngine();
var eval = "(function() { var AF_initDataCallback = function(p) { return p.data[1][2][140][0][0][0]; }; return " + script + " })()";
var result = engine.Evaluate(eval);
//var json = JSONObject.Stringify(engine, result); //for debug, check in browser console with JSON.parse(json)
var remote = $"{result}".ToDouble();
var local = App.Version.ToDouble();
return local < remote;
}
else if (Device.RuntimePlatform == Device.iOS)
{
var bundle = "com.todo.app";//iOS BUNDLE NAME HERE
string url = $"http://itunes.apple.com/lookup?bundleId={bundle}";
string raw = await myClient.GetStringAsync(new Uri(url));
var dto = JsonConvert.DeserializeObject<AppStoreRecord>(raw);
double local = App.Version.ToDouble();
if (dto.ResultCount > 0)
{
double remote = dto.Results[0].Version.ToDouble();
return remote > local;
}
}
}
catch (Exception e)
{
Logger.Error("CheckNeedUpdate", e);
}
finally
{
_lockCheckUpdates = false;
}
return false;
}
Using nugets
Jurassic to evaluate the script on page,
HtmlAgilityPack to parse html,
Xamarin.Essentials to check if we are online,
and AppoMobi.Specials for .ToDouble() etc
I hope this could also be useful to fix https://github.com/edsnider/latestversionplugin/issues/43 :)
The plugin you are using no longer works for Android https://github.com/edsnider/latestversionplugin/issues/43
You will need to find a new way to get the desired information.
PR has been made on this plugin... it works again ;-)
Intro
We're developing this javascript based web application that is supposed to print receipts using the epson javascript sdk.
Right now we've got this poc where multiple printers can be added to the app and where receipts can be printed per individual printer.
The problem is that the receipt will ONLY be printer from the last added printer.
Further investigating tells us that the sdk just uses the last added (connected) printer. This can be seen at the following images.
In the first image there are 2 printers setup. Notice the different ip addresses.
In the second image we log what EpsonPrinter instance is being used while printing. Notice the ip address is clearly the first printer.
In the third image we trace the network. Notice the ip address that is actually used (ignore the error).
We created our own EpsonPrinter class that can be found here or here below.
EpsonPrinter
export default class EpsonPrinter {
name = null
ipAddress = null
port = null
deviceId = null
crypto = false
buffer = false
eposdev = null
printer = null
intervalID = null
restry = 0
constructor (props) {
const {
name = 'Epson printer',
ipAddress,
port = 8008,
deviceId = 'local_printer',
crypto = false,
buffer = false
} = props
this.name = name
this.ipAddress = ipAddress
this.port = port
this.deviceId = deviceId
this.crypto = crypto
this.buffer = buffer
this.eposdev = new window.epson.ePOSDevice()
this.eposdev.onreconnecting = this.onReconnecting
this.eposdev.onreconnect = this.onReconnect
this.eposdev.ondisconnect = this.onDisconnect
this.connect()
}
onReconnecting = () => {
this.consoleLog('reconnecting')
}
onReconnect = () => {
this.consoleLog('reconnect')
}
onDisconnect = () => {
this.consoleLog('disconnect')
if (this.intervalID === null ){
this.intervalID = setInterval(() => this.reconnect(), 5000)
}
}
connect = () => {
this.consoleLog('connect')
this.eposdev.ondisconnect = null
this.eposdev.disconnect()
this.eposdev.connect(this.ipAddress, this.port, this.connectCallback)
}
reconnect = () => {
this.consoleLog('(Re)connect')
this.eposdev.connect(this.ipAddress, this.port, this.connectCallback)
}
connectCallback = (data) => {
clearInterval(this.intervalID)
this.intervalID = null
this.eposdev.ondisconnect = this.onDisconnect
if (data === 'OK' || data === 'SSL_CONNECT_OK') {
this.createDevice()
} else {
setTimeout(() => this.reconnect(), 5000)
}
}
createDevice = () => {
console.log('create device, try: ' + this.restry)
const options = {
crypto: this.crypto,
buffer: this.buffer
}
this.eposdev.createDevice(this.deviceId, this.eposdev.DEVICE_TYPE_PRINTER, options, this.createDeviceCallback)
}
createDeviceCallback = (deviceObj, code) => {
this.restry++
if (code === 'OK') {
this.printer = deviceObj
this.printer.onreceive = this.onReceive
} else if (code === 'DEVICE_IN_USE') {
if (this.restry < 5) {
setTimeout(() => this.createDevice(), 3000)
}
}
}
onReceive = (response) => {
this.consoleLog('on receive: ', response)
let message = `Print ${this.name} ${response.success ? 'success' : 'failute'}\n`
message += `Code: ${response.code}\n`
message += `Status: \n`
if (response.status === this.printer.ASB_NO_RESPONSE) { message += ' No printer response\n' }
if (response.status === this.printer.ASB_PRINT_SUCCESS) { message += ' Print complete\n' }
if (response.status === this.printer.ASB_DRAWER_KICK) { message += ' Status of the drawer kick number 3 connector pin = "H"\n' }
if (response.status === this.printer.ASB_OFF_LINE) { message += ' Offline status\n' }
if (response.status === this.printer.ASB_COVER_OPEN) { message += ' Cover is open\n' }
if (response.status === this.printer.ASB_PAPER_FEED) { message += ' Paper feed switch is feeding paper\n' }
if (response.status === this.printer.ASB_WAIT_ON_LINE) { message += ' Waiting for online recovery\n' }
if (response.status === this.printer.ASB_PANEL_SWITCH) { message += ' Panel switch is ON\n' }
if (response.status === this.printer.ASB_MECHANICAL_ERR) { message += ' Mechanical error generated\n' }
if (response.status === this.printer.ASB_AUTOCUTTER_ERR) { message += ' Auto cutter error generated\n' }
if (response.status === this.printer.ASB_UNRECOVER_ERR) { message += ' Unrecoverable error generated\n' }
if (response.status === this.printer.ASB_AUTORECOVER_ERR) { message += ' Auto recovery error generated\n' }
if (response.status === this.printer.ASB_RECEIPT_NEAR_END) { message += ' No paper in the roll paper near end detector\n' }
if (response.status === this.printer.ASB_RECEIPT_END) { message += ' No paper in the roll paper end detector\n' }
if (response.status === this.printer.ASB_SPOOLER_IS_STOPPED) { message += ' Stop the spooler\n' }
if (!response.success) {
alert(message)
// TODO: error message?
} else {
// TODO: success -> remove from queue
}
}
printReceipt = () => {
this.consoleLog(`Print receipt, `, this)
try {
if (!this.printer) {
throw `No printer created for ${this.name}`
}
this.printer.addPulse(this.printer.DRAWER_1, this.printer.PULSE_100)
this.printer.addText(`Printed from: ${this.name}\n`)
this.printer.send()
} catch (err) {
let message = `Print ${this.name} failure\n`
message += `Error: ${err}`
alert(message)
}
}
consoleLog = (...rest) => {
console.log(`${this.name}: `, ...rest)
}
}
Poc
The full working poc can be found here.
Epson javascript sdk
2.9.0
Does anyone have any experience with the epson sdk? It it supposed to be able to support multiple connections on the same time? Please let use know.
For the ones looking for a way to handle multiple printers using this SDK. We came up with the following work around:
We created a separated 'printer app' that is responsible for handling ONE printer connection and hosted it online. We then 'load' this printer app into our app that needs multiple connections using Iframes. Communication between app and printer app is done by means of window.PostMessage API to, for example, initialise the printer with the correct printer connection and providing data that has to be printed.
It takes some effort but was the most stable solution we could come up with handling multiple connections.
If anyone else comes up with a better approach please let me know!
You can checkout our printer app here for inspiration (inspect the app because it doesn't show much visiting it just like that).
For use your class EpsonPrinter, i add also myPrinters class after your class:
class myPrinters {
printers = null;
cantidad = 0;
constructor() {
console.log("Creo la coleccion de printers");
this.printers = [];
}
inicializarConeccionImpresora(idImpresora, ip, puerto, _deviceId) {
let ipAddress = ip;
let port = puerto;
let deviceId = _deviceId;
console.log("Agrego una impresora");
let myPrinter = new EpsonPrinter(ipAddress);
myPrinter.port = port;
myPrinter.deviceId = deviceId;
myPrinter.id = idImpresora;
console.log('Id impresora antes de connect es: ' + idImpresora);
myPrinter.connect();
this.printers[this.cantidad] = myPrinter;
this.cantidad ++;
}
imprimirPruebaJS(idImpresora) {
let printer = null;
let printerTemp = null
for(var i = 0; i < this.printers.length; i++) {
printerTemp = this.printers[i];
if (printerTemp.id == idImpresora) {
printer = printerTemp.printer;
}
}
if (printer == null) {
console.log("La impresora no esta iniciada en clase myPrinters");
return;
}
printer.addText('Hola mundo texto normal\n');
printer.addFeed();
printer.addCut(printer.CUT_FEED);
}
}
call myPrinters class in this way :
myEpsonPrinters = new myPrinters();
myEpsonPrinters.inicializarConeccionImpresora(1, '192.168.0.51', 8008, 'local_printer');
myEpsonPrinters.inicializarConeccionImpresora(2, '192.168.0.52', 8008, 'local_printer');
myEpsonPrinters.imprimirPruebaJS(1)
or
myEpsonPrinters.imprimirPruebaJS(2)
Test it and tell me.
Juan
Just create multiple objects for printing simple as this
this.eposdev = [];
let printersCnt = 3;
let self = this;
for(let i=1 ; i <= printersCnt ; i++){
this.eposdev[i] = new window.epson.ePOSDevice()
this.eposdev[i].onreconnecting = function (){
this.consoleLog('reConnecting')
}
this.eposdev[i].onreconnect = function (){
this.consoleLog('onReconnect')
}
this.eposdev[i].ondisconnect = function (){
this.consoleLog('onDisconnect')
}
}
function connect(printerKey) => {
this.consoleLog('connect')
this.eposdev.ondisconnect = null
this.eposdev.disconnect()
this.eposdev.connect(self.ipAddress[printerKey], self.port[printerKey], function(){
clearInterval(self.intervalID)
self.intervalID = null
self.eposdev[i].ondisconnect = self.ondisconnect
if (data === 'OK' || data === 'SSL_CONNECT_OK') {
console.log('create device, try: ' + self.restry)
const options = {
crypto: self.crypto,
buffer: self.buffer
}
self.eposdev[printerKey].createDevice(self.deviceId, self.eposdev[printerKey].DEVICE_TYPE_PRINTER, options, function(deviceObj, code){
this.restry++
if (code === 'OK') {
self.printer[printerKey] = deviceObj
self.printer.onreceive = function(){
console.log("onreceive");
}
} else if (code === 'DEVICE_IN_USE') {
if (self.restry < 5) {
setTimeout(() => self.createDevice(printerKey), 3000)
}
})
}
} else {
setTimeout(() => self.reconnect(printerKey), 5000)
}
})
}
Epson says that with version 2.12.0 you can add more than one printer.
I use Xamarin-CrossDownloadManager (https://github.com/SimonSimCity/Xamarin-CrossDownloadManager) and I need waiting for download a file. I have this code:
private static async Task<bool> FileDownloadedTest(string LinkToFile, string PathFile)
{
var downloadManager = CrossDownloadManager.Current;
CrossDownloadManager.Current.PathNameForDownloadedFile = new System.Func<IDownloadFile, string>(file => {
return PathFile;
});
{
await DeleteFile(PathFile);
var file = downloadManager.CreateDownloadFile(LinkToFile);
await Task.Run(() => downloadManager.Start(file, true)); //why this not wait???
}
bool FileExist = await IsFileExist(PathFile);
return FileExist;
}
Why it not wait for finish download action? How to do it?
On library site they wrote, that I can watch the IDownloadManager.Queue to get information when the file is downloaded. But, I don't know how to use this in my method... Can you help me?
PS: Sorry for my english, I'm still learning it ;)
With that library, there is no callback or event published for when a file is finished downloading, but you can do a simple check and wait some more loop.
await Task.Run(async () =>
{
var downloadManager = CrossDownloadManager.Current;
var file = downloadManager.CreateDownloadFile(someFileBasedUrl);
downloadManager.Start(file);
bool isDownloading = true;
while (isDownloading)
{
await Task.Delay(10 * 1000);
isDownloading = IsDownloading(file);
}
});
The IsDownloading method:
bool IsDownloading(IDownloadFile file)
{
if (file == null) return false;
switch (file.Status)
{
case DownloadFileStatus.INITIALIZED:
case DownloadFileStatus.PAUSED:
case DownloadFileStatus.PENDING:
case DownloadFileStatus.RUNNING:
return true;
case DownloadFileStatus.COMPLETED:
case DownloadFileStatus.CANCELED:
case DownloadFileStatus.FAILED:
return false;
default:
throw new ArgumentOutOfRangeException();
}
}
Re: https://github.com/SimonSimCity/Xamarin-CrossDownloadManager/blob/develop/Sample/DownloadExample/Downloader.cs#L46
I don't know why IDownloadFile.Status = COMPLETED not working, but i found solve problem:
await Task.Run(() =>
{
var downloadManager = CrossDownloadManager.Current;
var file = downloadManager.CreateDownloadFile(LinkToFile);
downloadManager.Start(file);
while (file.Status == DownloadFileStatus.INITIALIZED)
{
while (file.TotalBytesExpected > file.TotalBytesWritten)
{
Debug.WriteLine(file.Status);
}
}
});
Somebody know why DownloadFileStatus.INITIALIZED working, but DownloadFileStatus.COMPLETED not?
SushiHangover's answer above worked great, and I combined it with ACR User Dialog's package (https://github.com/aritchie/userdialogs) to show a nice loading progress screen to the user while waiting for the download to complete. This works nicely on Android (I couldn't test iOS yet).
...
var downloadManager = CrossDownloadManager.Current;
var fileToDownload = downloadManager.CreateDownloadFile(args.Url);
downloadManager.Start(fileToDownload, true);
args.Cancel = true;
UserDialogs.Instance.Progress("Downloading").Show();
bool isDownloading = true;
while (isDownloading)
{
await Task.Delay(100);
if (fileToDownload.TotalBytesExpected > 0)
{
UserDialogs.Instance.Progress().PercentComplete = (int)(fileToDownload.TotalBytesWritten / fileToDownload.TotalBytesExpected * 100);
Console.WriteLine(("DOWNLOAD PROGRESS: " + fileToDownload.TotalBytesWritten / fileToDownload.TotalBytesExpected * 100).ToString() + "%");
}
isDownloading = IsDownloading(fileToDownload);
}
UserDialogs.Instance.Progress().Hide();
//Below code opens the download location after download has completed.
Intent intent = new Intent(DownloadManager.ActionViewDownloads);
intent.AddFlags(ActivityFlags.NewTask);
Android.App.Application.Context.StartActivity(intent);
return;
}
}
}
bool IsDownloading(IDownloadFile file)
{
if (file == null) return false;
switch (file.Status)
{
case DownloadFileStatus.INITIALIZED:
case DownloadFileStatus.PAUSED:
case DownloadFileStatus.PENDING:
case DownloadFileStatus.RUNNING:
return true;
case DownloadFileStatus.COMPLETED:
case DownloadFileStatus.CANCELED:
case DownloadFileStatus.FAILED:
return false;
default:
throw new ArgumentOutOfRangeException();
}
}
I try to unregister stylesheet:
try {
var StyleService = Cc["#mozilla.org/content/style-sheet-service;1"].getService(Ci.nsIStyleSheetService);
StyleService.unregisterSheet(url, StyleService.USER_SHEET);
} catch (e){
console.log(e);
}
var isRegistered = StyleService.sheetRegistered(url, StyleService.USER_SHEET);
if (isRegistered) {
console.log("styleSheet unregister check is failed url:" + url.path);
}
One stylesheet i generate Services.io.newURI("data:text/css,"+ encodeURIComponent(content), null, null);
And it unregisters fine. But another file located on ProfD directory fails on isRegistered check.
var styleFile = FileUtils.getFile(FS.ProfileName, [FS.DirName, this.CSS_FILE_PATH]);
this.injectCssUrl = IoService.newFileURI(styleFile).QueryInterface(Ci.nsIFileURL);
Why it unregister?
var sss = Components.classes['#mozilla.org/content/style-sheet-service;1'].getService(Components.interfaces.nsIStyleSheetService);
var ios = Components.classes['#mozilla.org/network/io-service;1'].getService(Components.interfaces.nsIIOService);
try {
sss.unregisterSheet(cssUri, sss.USER_SHEET);
} catch (ex) {}
var css = 'setting .preferences-alignment{ display:flex; flex-direction:row-reverse; align-items:center; }';
//var cssEnc = 'data:text/css;base64,' + window.btoa(css);
var cssEnc = encodeURIComponent(css);
var cssUri = makeURI('data:text/css,' + cssEnc);
sss.loadAndRegisterSheet(cssUri, sss.USER_SHEET);
if you want to use a file then something like
var appliedURI;
function startup(aData, aReason) {
var path = aData.resourceURI.spec + 'no_icon.css'; //or in your case styleFile.path
appliedURI = Services.io.newURI(path, null, null);
sss.loadAndRegisterSheet(appliedURI, sss.USER_SHEET);
}
function shutdown(aData, aReason) {
if (aReason == APP_SHUTDOWN) return;
sss.unregisterSheet(appliedURI, sss.USER_SHEET);
}
My problem was that i register the same style several times. After i unregister style each time before register again all works normaly
Hey i have been able to write an nsIStreamListener listener to listen on responses and get the response text following tutorials at nsitraceablechannel-intercept-http-traffic .But i am unable to modify the response sent to browser.Actually if i return the reponse and sent back to chain it reflects in firebug but not in browser.
What i am guessing is we will have to replace default listener rather than listening in the chain.I cant get any docs anywhere which explains how to do this.
Could anyone give me some insight into this.This is mainly for education purposes.
Thanks in advance
Edit : As of now i have arrived at a little solutions i am able to do this
var old;
function TracingListener() {}
TracingListener.prototype = {
originalListener: null,
receivedData: null, //will be an array for incoming data.
//For the listener this is step 1.
onStartRequest: function (request, context) {
this.receivedData = []; //initialize the array
//Pass on the onStartRequest call to the next listener in the chain -- VERY IMPORTANT
//old.onStartRequest(request, context);
},
//This is step 2. This gets called every time additional data is available
onDataAvailable: function (request, context, inputStream, offset, count) {
var binaryInputStream = CCIN("#mozilla.org/binaryinputstream;1",
"nsIBinaryInputStream");
binaryInputStream.setInputStream(inputStream);
var storageStream = CCIN("#mozilla.org/storagestream;1",
"nsIStorageStream");
//8192 is the segment size in bytes, count is the maximum size of the stream in bytes
storageStream.init(8192, count, null);
var binaryOutputStream = CCIN("#mozilla.org/binaryoutputstream;1",
"nsIBinaryOutputStream");
binaryOutputStream.setOutputStream(storageStream.getOutputStream(0));
// Copy received data as they come.
var data = binaryInputStream.readBytes(count);
this.receivedData.push(data);
binaryOutputStream.writeBytes(data, count);
//Pass it on down the chain
//old.onDataAvailable(request, context,storageStream.newInputStream(0), offset, count);
},
onStopRequest: function (request, context, statusCode) {
try {
//QueryInterface into HttpChannel to access originalURI and requestMethod properties
request.QueryInterface(Ci.nsIHttpChannel);
//Combine the response into a single string
var responseSource = this.receivedData.join('');
//edit data as needed
responseSource = "test";
console.log(responseSource);
} catch (e) {
//standard function to dump a formatted version of the error to console
dumpError(e);
}
var stream = Cc["#mozilla.org/io/string-input-stream;1"]
.createInstance(Ci.nsIStringInputStream);
stream.setData(responseSource, -1);
//Pass it to the original listener
//old.originalListener=null;
old.onStartRequest(channel, context);
old.onDataAvailable(channel, context, stream, 0, stream.available());
old.onStopRequest(channel, context, statusCode);
},
QueryInterface: function (aIID) {
if (aIID.equals(Ci.nsIStreamListener) ||
aIID.equals(Ci.nsISupports)) {
return this;
}
throw components.results.NS_NOINTERFACE;
},
readPostTextFromRequest: function (request, context) {
try {
var is = request.QueryInterface(Ci.nsIUploadChannel).uploadStream;
if (is) {
var ss = is.QueryInterface(Ci.nsISeekableStream);
var prevOffset;
if (ss) {
prevOffset = ss.tell();
ss.seek(Ci.nsISeekableStream.NS_SEEK_SET, 0);
}
// Read data from the stream..
var charset = "UTF-8";
var text = this.readFromStream(is, charset, true);
if (ss && prevOffset == 0)
ss.seek(Ci.nsISeekableStream.NS_SEEK_SET, 0);
return text;
} else {
dump("Failed to Query Interface for upload stream.\n");
}
} catch (exc) {
dumpError(exc);
}
return null;
},
readFromStream: function (stream, charset, noClose) {
var sis = CCSV("#mozilla.org/binaryinputstream;1",
"nsIBinaryInputStream");
sis.setInputStream(stream);
var segments = [];
for (var count = stream.available(); count; count = stream.available())
segments.push(sis.readBytes(count));
if (!noClose)
sis.close();
var text = segments.join("");
return text;
}
}
httpRequestObserver = {
observe: function (request, aTopic, aData) {
if (typeof Cc == "undefined") {
var Cc = components.classes;
}
if (typeof Ci == "undefined") {
var Ci = components.interfaces;
}
if (aTopic == "http-on-examine-response") {
request.QueryInterface(Ci.nsIHttpChannel);
console.log(request.statusCode);
var newListener = new TracingListener();
request.QueryInterface(Ci.nsITraceableChannel);
channel = request;
//newListener.originalListener
//add new listener as default and save old one
old = request.setNewListener(newListener);
old.originalListener = null;
var threadManager = Cc["#mozilla.org/thread-manager;1"]
.getService(Ci.nsIThreadManager);
threadManager.currentThread.dispatch(newListener, Ci.nsIEventTarget.DISPATCH_NORMAL);
}
},
QueryInterface: function (aIID) {
if (typeof Cc == "undefined") {
var Cc = components.classes;
}
if (typeof Ci == "undefined") {
var Ci = components.interfaces;
}
if (aIID.equals(Ci.nsIObserver) ||
aIID.equals(Ci.nsISupports)) {
return this;
}
throw components.results.NS_NOINTERFACE;
},
};
var observerService = Cc["#mozilla.org/observer-service;1"]
.getService(Ci.nsIObserverService);
observerService.addObserver(httpRequestObserver,
"http-on-examine-response", false);
This example works for me on Firefox 34 (current nightly): https://github.com/Noitidart/demo-nsITraceableChannel
I downloaded the xpi, edited bootstrap.js to modify the stream:
132 // Copy received data as they come.
133 var data = binaryInputStream.readBytes(count);
134 data = data.replace(/GitHub/g, "TEST");
135 this.receivedData.push(data);
installed the XPI then reloaded the github page. It read "TEST" in the footer.
The version of code you posted doesn't actually pass the results back to the old listener, so that's the first thing that ought to be changed.
It also may have interacted with Firebug or another extension badly. It's a good idea to try reproducing the problem in a clean profile (with only your extension installed).