Chrome runtime sendmessage

Author: s | 2025-04-24

Introduction to Chrome Runtime SendMessage API. The Chrome Runtime SendMessage API is a pivotal tool in the world of browser extensions, offering a streamlined

sendMessage and onMessage.addListener works fine in Chrome

Download demo - 84.4 KB Download source - 136.2 KBIntroductionThis topic focuses on two things: What is the difference between SendMessage and PostMessage How to use SendMessage, PostMessage with WM_KEYDOWN. The way to find LParam and RParam parametersTo understand what is the difference between SendMessage and PostMessage, please look at the below table.What is the Difference between SendMessage, PostMessage SendMessage PostMessage Sends the specified message to a window or windows. The SendMessage function calls the window procedure for the specified window and does not return until the window procedure has processed the message (from MSDN) Places (posts) a message in the message queue associated with the thread that created the specified window and returns without waiting for the thread to process the message (from MSDN) Sequentially Not sequentially synchronous asynchronous How to Use SendMessage, PostMessage?Parameters? HWND is a handle you want to seed message to this window WPARAM, you can view here: The virtual-key code of the nonsystem key. LPARAM, you can know through Notepad program and Microsoft spy++How to Find LParam First, you must download Microsoft spy++. If you install Microsoft Visual 2012, Microsoft spy ++ will be integrated I will demo how to get LParam with VK_KEYDOWN, value through some basic steps (Same as, you can do it with VK_DOWN, VK_LEFT, .... key) Now open Notepad by run -> notepad Open your Microsoft Spy ++ (Built-in Microsoft Visual Studio 2012 ++) Next, Click to menu Spy -> FindWindows, using cross circle on the red frame. Drag this cross circle to Notepad on this edit area: Click choose Messages properties same as the below picture. Then click ok. Let's press RETURN key to Edit Area, you can easily see WM_KEYDOWN message on Microsoft Spy++ Dash Broad. Then, right click to that message and choose properties, you can easily know LParam); [return: MarshalAs(UnmanagedType.Bool)] [DllImport("user32.dll", SetLastError = true)] private static extern bool PostMessage(IntPtr hWnd, WM Msg, IntPtr wParam, IntPtr lParam); public static int AddFont(string fontFilePath) { FileInfo fontFile = new FileInfo(fontFilePath); if (!fontFile.Exists) { return 0; } try { int retVal = AddFontResource(fontFilePath); //This version of SendMessage is a blocking call until all windows respond. //long result = SendMessage(HWND_BROADCAST, WM.FONTCHANGE, IntPtr.Zero, IntPtr.Zero); //Alternatively PostMessage instead of SendMessage to prevent application hang bool posted = PostMessage(HWND_BROADCAST, WM.FONTCHANGE, IntPtr.Zero, IntPtr.Zero); return retVal; } catch { return 0; } } public static int RemoveFont(string fontFileName) { //FileInfo fontFile = new FileInfo(fontFileName); //if (!fontFile.Exists) //{ // return false; //} try { int retVal = RemoveFontResource(fontFileName); //This version of SendMessage is a blocking call until all windows respond. //long result = SendMessage(HWND_BROADCAST, WM.FONTCHANGE, IntPtr.Zero, IntPtr.Zero); //Alternatively PostMessage instead of SendMessage to prevent application hang bool posted = PostMessage(HWND_BROADCAST, WM.FONTCHANGE, IntPtr.Zero, IntPtr.Zero); return retVal; } catch { return 0; } } public enum WM : uint { NULL = 0x0000, CREATE = 0x0001, DESTROY = 0x0002, MOVE = 0x0003, SIZE = 0x0005, ACTIVATE = 0x0006, SETFOCUS = 0x0007, KILLFOCUS = 0x0008, ENABLE = 0x000A, SETREDRAW = 0x000B, SETTEXT = 0x000C, GETTEXT = 0x000D, GETTEXTLENGTH = 0x000E, PAINT = 0x000F, CLOSE = 0x0010, QUERYENDSESSION = 0x0011, QUERYOPEN = 0x0013, ENDSESSION = 0x0016, QUIT = 0x0012, ERASEBKGND = 0x0014, SYSCOLORCHANGE = 0x0015, SHOWWINDOW = 0x0018, WININICHANGE = 0x001A, SETTINGCHANGE = WM.WININICHANGE, DEVMODECHANGE = 0x001B, ACTIVATEAPP = 0x001C, FONTCHANGE = 0x001D, TIMECHANGE = 0x001E, CANCELMODE = 0x001F, SETCURSOR = 0x0020, MOUSEACTIVATE = 0x0021, CHILDACTIVATE = 0x0022, QUEUESYNC = 0x0023, GETMINMAXINFO = 0x0024, PAINTICON = 0x0026, ICONERASEBKGND = 0x0027, NEXTDLGCTL = 0x0028, SPOOLERSTATUS = 0x002A, DRAWITEM = 0x002B, MEASUREITEM = 0x002C, DELETEITEM = 0x002D, VKEYTOITEM = 0x002E, CHARTOITEM = 0x002F, SETFONT = 0x0030, GETFONT = 0x0031, SETHOTKEY = 0x0032, GETHOTKEY =

Chrome Extension: dealing with asynchronous sendMessage.

Minimal repro repo: happens with both v0.2.1 on npm and when built from commit 2537b23.SummaryIf a browser.runtime.onMessage callback does not return a Promise, browser.runtime.sendMessage will be rejected with the following error, causing noise in the console:"The message port closed before a response was received."WorkaroundEven if you don't want to send a response, always return a promisein your onMessage callback: { console.log("background: onMessage", message); // Add this line: return Promise.resolve("Dummy response to keep the console quiet");});">// background.jsbrowser.runtime.onMessage.addListener(message => { console.log("background: onMessage", message); // Add this line: return Promise.resolve("Dummy response to keep the console quiet");});You can also make the onMessage callback async to implicitly return a Promise (resolving to undefined in the below example). { console.log("background: onMessage", message);});">// background.js// Notice the `async` keyword.browser.runtime.onMessage.addListener(async message => { console.log("background: onMessage", message);});FilesCopied over for convenience from: ], "js": [ "browser-polyfill-master.js", "content.js" ] } ]}">{ "manifest_version": 2, "version": "0.0.0", "name": "Test", "background": { "scripts": [ "browser-polyfill-npm.js", "background.js" ] }, "content_scripts": [ { "matches": [ "" ], "js": [ "browser-polyfill-master.js", "content.js" ] } ]}// background.jsbrowser.runtime.onMessage.addListener(onMessage);function onMessage(message) { console.log("background: onMessage", message); // 1: Causes the following to be logged in content: // "The message port closed before a response was received." return undefined; // 2: Causes this response to be logged in content, as expected. // return Promise.resolve("response from background"); // 3: Causes this error to be logged in content, as expected. // return Promise.reject(new Error("Could not respond")); // 4: Causes nothing at all to be logged in content! // I guess it is waiting for the deprecated `sendResponse` parameter to be // called. // return true;} {// console.log("content: callback", response, chrome.runtime.lastError);// });// console.log(// "content: after chrome.runtime.sendMessage with callback",// chrome.runtime.lastError// );">// content.js// 1: Unless background returns a Promise in its onMessage, this promise is// rejected with:// "The message port closed before a response was received."browser.runtime .sendMessage("hello from content") .then(console.log, console.error);// 2: This does not seem to cause any errors:// chrome.runtime.sendMessage("hello from content");// console.log("content: after chrome.runtime.sendMessage", chrome.runtime.lastError);// 3: Inside the callback, `chrome.runtime.lastError` will be:// "The message port closed before a response was received."// It seems like if `sendMessage` defines a callback but the other end doesn't// respond, Chrome is treating that as an error. Which makes sense.// The question is how this should be handled in a Promise based API.// chrome.runtime.sendMessage("hello from content", response => {// console.log("content: callback", response, chrome.runtime.lastError);// });// console.log(// "content: after chrome.runtime.sendMessage with callback",// chrome.runtime.lastError// );Solution?Should the "The message port closed before a response was received." be detected, and the promise should be resolved with undefined?. Introduction to Chrome Runtime SendMessage API. The Chrome Runtime SendMessage API is a pivotal tool in the world of browser extensions, offering a streamlined The Chrome Runtime SendMessage API is a pivotal tool in the world of browser extensions, offering a streamlined approach to inter-component communication.

javascript - Chrome extensions SendMessage - Could not

Skip to main content This browser is no longer supported. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. How to Use Rich Edit Text Operations Article08/21/2020 In this article -->An application can send messages to retrieve or find text in a rich edit control. You can retrieve either the selected text or a specified range of text.To get the selected text in a rich edit control, use the EM_GETSELTEXT message. The text is copied to the specified character array. You must ensure that the array is large enough to hold the selected text plus a terminating null character.To retrieve a specified range of text, use the EM_GETTEXTRANGE message. The TEXTRANGE structure used with this message specifies the text range to retrieve and points to a character array that receives the text. Here again, the application must ensure that the array is large enough for the specified text plus a terminating null character.You can search for a string in a rich edit control by using the EM_FINDTEXT or EM_FINDTEXTEX messages, or their Unicode equivalents, EM_FINDTEXTW and EM_FINDTEXTEXW. The FINDTEXT structure that is used with the nonextended versions specifies the text range to search and the string to search for. The extended versions use a FINDTEXTEX structure, which specifies the same information and also receives the start and end points of the character range of the found text. You can also specify such options as whether the search is case sensitive.What you need to knowTechnologiesWindows ControlsPrerequisitesC/C++Windows User Interface ProgrammingInstructionsUse a Rich Edit Text OperationThe following example function finds the specified text within the selected text in a rich edit control that supports Unicode. If the target is found, it becomes the new selection.BOOL FindTextInSelection(HWND hRich, WCHAR* target){ CHARRANGE selectionRange; SendMessage(hRich, EM_EXGETSEL, 0, (LPARAM)&selectionRange); FINDTEXTEX ftex; ftex.lpstrText = target; ftex.chrg.cpMin = selectionRange.cpMin; ftex.chrg.cpMax = selectionRange.cpMax; LRESULT lr = SendMessage(hRich, EM_FINDTEXTEXW, (WPARAM)FR_DOWN, (LPARAM) &ftex); if (lr >= 0) { LRESULT lr1 = SendMessage(hRich, EM_EXSETSEL, 0, (LPARAM)&ftex.chrgText); SendMessage(hRich, EM_HIDESELECTION, (LPARAM)FALSE, 0); return TRUE; } return FALSE; }RemarksMicrosoft Rich Edit 3.0 also supports the HexToUnicode Input Method Editor (IME) function, which allows a user to convert between hexadecimal and Unicode by using hot keys. For more information, see HexToUnicode IME. Using Rich Edit Controls Windows common controls demo (CppWindowsCommonControls) --> Feedback Additional resources In this article PackagedioVersion5.1.1Output of flutter doctor -v[✓] Flutter (Channel stable, 3.7.12, on macOS 13.3.1 22E261 darwin-arm64, locale en-TR) • Flutter version 3.7.12 on channel stable at /Users/ibrahim/tools/flutter • Upstream repository • Framework revision 4d9e56e694 (7 days ago), 2023-04-17 21:47:46 -0400 • Engine revision 1a65d409c7 • Dart version 2.19.6 • DevTools version 2.20.1[✓] Android toolchain - develop for Android devices (Android SDK version 32.1.0-rc1) • Android SDK at /Users/ibrahim/Library/Android/sdk • Platform android-33, build-tools 32.1.0-rc1 • Java binary at: /Users/ibrahim/Library/Application Support/JetBrains/Toolbox/apps/AndroidStudio/ch-0/222.4459.24.2221.9862592/Android Studio.app/Contents/jbr/Contents/Home/bin/java • Java version OpenJDK Runtime Environment (build 17.0.6+0-17.0.6b802.4-9586694) • All Android licenses accepted.[✓] Xcode - develop for iOS and macOS (Xcode 14.3) • Xcode at /Applications/Xcode.app/Contents/Developer • Build 14E222b • CocoaPods version 1.11.3[✓] Chrome - develop for the web • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome[✓] Android Studio (version 2022.1) • Android Studio at /Users/ibrahim/Library/Application Support/JetBrains/Toolbox/apps/AndroidStudio/ch-0/221.6008.13.2211.9619390/Android Studio.app/Contents • Flutter plugin can be installed from: 🔨 • Dart plugin can be installed from: 🔨 • Java version OpenJDK Runtime Environment (build 11.0.15+0-b2043.56-8887301)[✓] Android Studio (version 2022.2) • Android Studio at /Users/ibrahim/Library/Application Support/JetBrains/Toolbox/apps/AndroidStudio/ch-0/222.4459.24.2221.9862592/Android Studio.app/Contents • Flutter plugin can be installed from: 🔨 • Dart plugin can be installed from: 🔨 • Java version OpenJDK Runtime Environment (build 17.0.6+0-17.0.6b802.4-9586694)[✓] VS Code (version 1.77.3) • VS Code at /Applications/Visual Studio Code.app/Contents • Flutter extension can be installed from: 🔨 Connected device (3 available) • Iphone7 Ofis (mobile) • 2375e3716bb5cc7b915c93fa8e122f93f47e71d3 • ios • iOS 16.4.1 20E252 • macOS (desktop) • macos • darwin-arm64 • macOS 13.3.1 22E261 darwin-arm64 • Chrome (web) • chrome • web-javascript • Google Chrome

Sendmessage in Chrome not working - Unity Discussions

Has evolved into a full-fledged Git server. Android x86 has an active open-source community, which has made significant contributions to the project. The platform has been extensively tested on various devices, including Microtech e-tab Pro (2018), ASUS Eee PCs/Laptops, Viewsonic Viewpad 10, Dell Inspiron Mini Duo, Samsung Q1U, Viliv S5, Lenovo ThinkPad x61 Tablet, and many more, with shared test results benefiting the wider community.The latest stable release, Android-x86 8.1-r6, comes with a host of impressive features and improvements. It utilizes Kernel 4.19 with KMS (Kernel Mode Setting) enabled, enhancing graphics performance and display capabilities. Power Suspend and Resume (S3 mode) is supported, allowing devices to efficiently manage power states. Other notable features include Audio (ALSA), Bluetooth, G-sensor, V4l2 Camera support, mirror mode on external monitors, automatic mounting of external storage, external keyboards, and mouse wheel compatibility.Some upcoming developments include porting Android 10 (Q release) to the platform, upgrading the kernel to version 5.4, and implementing OpenGL ES hardware acceleration for Intel, Radeon, Nvidia, AMDGPU, and Virgl GPUs. ARChon RuntimeARChon Runtime is a remarkable platform designed specifically for Chrome, enabling developers to run Android apps on Windows, Linux, and other systems using the Chrome browser. The latest version, ARChon 2.1.0 Beta (ARC 41.4410.238.0), continues to refine and improve the experience of running Android apps on non-Android platforms.The platform offers a range of download options tailored to different devices and configurations. Users can select the appropriate version for their devices, such as Intel x86 Chrome 64-bit/Chrome OS 64-bit, 32-bit/Chrome OS 32-bit, or ARM (compatible with ARM-based Chromebooks).Setting up ARChon Runtime is a straightforward process. Users need to download the ARChon runtime and then extract it. Afterward, they can navigate to “chrome://extensions,” enable “Developer Mode,” and load the runtime. To test the capabilities of the platform, users can try out the sample app by downloading it, extracting it, loading it as an unpacked extension, and then pressing “Launch.”For converting Android apps to be compatible with ARChon, the platform provides useful tools to streamline the process. These tools include chromeos-apk (CLI app conversion tool), ARChon Packager (Android-based conversion tool), and twerk (Chrome-based conversion tool). Android StudioAndroid Studio is the official Integrated Development Environment (IDE) provided by Android for Android app development. While its primary purpose is to facilitate the creation of new Android apps from scratch, it can also be utilized for various modifications and technological integrations, including running Android apps on Linux.The

chrome extension sendmessage await until getdata

Data through WebSocketWebSocket code has a typical format. You can copy the code in tv_get_csv.py and make few changesSomething like thisIn the image Arrow_1 = scroll the cursor upArrow_2 click 'chart_create_session'Arrow_3 Text will apear. Observe the text and see the see the similarities b/w our codesendMessage(ws, "chart_create_session", [chart_session, ""]) #chart session is dynamically generated with this line chart_session = generateChartSession()Another example (felt above one wasn't that clear )In the above chart, Arrow_1 is pointing at a small red bar in websocket response- indicates message came from server & Arrow_2 pointing at green bar indicates message sending to the server. So in our code all our sendMessage() are copied from message in front of green barsLet's click Arrow_3Arrow_4 click there to expand the messageLet's get back to our code tv_get_csv.py where we are writing websocket sendMessage(), check this linesendMessage(ws, "create_series", [chart_session, "sds_1", "s1", "sds_sym_1", fr, bars])This is what exactly written at Arrow_4Similarly, observe other lines near to that line in the code and match with 'ws' tab in the browser. This is where changes will trigger 1st when Tradingview add or remove the features or change the user interface.. Introduction to Chrome Runtime SendMessage API. The Chrome Runtime SendMessage API is a pivotal tool in the world of browser extensions, offering a streamlined The Chrome Runtime SendMessage API is a pivotal tool in the world of browser extensions, offering a streamlined approach to inter-component communication.

sendmessage - Message passing chrome extension - Stack

Returning. This state is a complete reader connection.Next, you will want identify the RFID tag. Look at the RunInventory function in the CRFIDRadioManager. This function sends tags for the read command to the RFID reader. It creates a thread for the read command.void CMainFrame::OnRfidRunInventory(){ pRFIDRadioManager->RunInventory(0, -1);}RFID_STATUS CRFIDRadioManager::RunInventory(int nModule, INT32 nCount){ RFID_STATUS status = RFID_STATUS_OK; if(m_listRadio.GetCount() > 0) { POSITION pos = m_listRadio.FindIndex(nModule); CRFIDRadio* pRadio = (CRFIDRadio*)m_listRadio.GetAt(pos); pRadio->m_nStopCountDown = nCount; pRadio->m_runStatus = RFID_INVENTORY; _oleStartDateTime = COleDateTime::GetCurrentTime(); Radio->Create(); } return status;}The packet parameter is the result information from the reader. The base structure is RFID_PACKET_COMMON. For detailed structure information, see the Interface Specification white paper in the Samsung Techwin homepage.The CRFIDRadioManager returns the parent CTagInfo object using the SetParent function.case RFID_PACKET_TYPE_18K6C_INVENTORY:{ RFID_PACKET_18K6C_INVENTORY *inv = (RFID_PACKET_18K6C_INVENTORY *)packet; int length = (MacToHost16(common->pkt_len)-1) * BYTES_PER_LEN_UNIT - (common->flags >> 6); if(common->flags & 0x01) break; int padding_byte = (int)(common->flags & 0xC0); POSITION pos = m_listRadio.FindIndex(0); CRFIDRadio* pRadio = (CRFIDRadio*)m_listRadio.GetAt(pos); if(pRadio->m_runStatus != RFID_INVENTORY) { CString strTemp = TEXT("Tag ID : "); CTagInfo lpTagInfo; lpTagInfo.SetTagMemory(inv->inv_data); strTemp += lpTagInfo.GetTagString(); theApp.m_pMainWnd->SendMessage(WM_TAG_ACCESS, (WPARAM)(LPCTSTR)strTemp, 0);#ifdef _WIN32_WCE if(m_radioBeepMode == RFID_RADIO_BEEP_MODE_ENABLE) m_waveBox->Play(0);#endif break; } CTagInfo* lpTagInfo = new CTagInfo(); lpTagInfo->SetTagMemory(inv->inv_data); lpTagInfo->SetTagReadCount(inv->count); lpTagInfo->SetTagTrialCount(inv->trial_count); lpTagInfo->SetTagAntenna(m_nAntenna); lpTagInfo->SetTagChannel(m_nChannel); lpTagInfo->SetTagRSSI(MacToHost16(inv->rssi)); lpTagInfo->SetTagLNAGain(MacToHost16(inv->ana_ctrl1)); lpTagInfo->SetTagReveiveTime(COleDateTime::GetCurrentTime());ifdef _WIN32_WCE if(m_radioBeepMode == RFID_RADIO_BEEP_MODE_ENABLE) _waveBox->Play(0);#endif m_pParent->SendMessage(WM_PROCESS_TAG, (WPARAM)lpTagInfo); break;}The CTagInfo object copies tag information from the RFID Reader. And, the CTagInfo object reconstructs PC, EPC, and other information using the ISO 18000-6C tag type.I do type cast from the packet parameter to the RFID_PACKET_18K6C_INVENTORY struct. And, I define the inv variance. I check the packet length and the flag for the right packet type. If the packet is right, I make a CTagInfo object for tag information. Finally, I return a CTagInfo object to the parent object using the SendMessage function. The complete source code is available from the download link above.