Corroder
Grandmaster Cheater Supreme
 Reputation: 75
Joined: 10 Apr 2015
Posts: 1668
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 Posted: Sat Apr 25, 2020 9:58 am Post subject: Trying creating a WebView. CE faild to load libraries. |
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I am trying to make Web Page Viewer adapted to CE Lua scripting environments.
I made ones using Lua 5.3.5 scripting and using WebView.dll + Cjson.dll from Lua JLS 5.3.5 as framework libraries. It's work fine when execute using Lua 5.3.5
| Code: | -- test.lua (webview script Lua 5.3.5 example)
local webviewLib = require('webview')
-- Default web content
local url = [[data:text/html,<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html dir="ltr">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta http-equiv="Content-Style-Type" content="text/css">
<link rel="top" href="./index.php?sid=ab3b4da2ec9bef9773a781137cad6616" title="Cheat Engine Forum Index" />
--- some HTML code until...
</html>
]]
local requestFunctionMap = {
fullscreen = function(value, _, _, _, webview)
webviewLib.fullscreen(webview, value == 'true')
end,
title = function(value, _, _, _, webview)
webviewLib.title(webview, value)
end,
terminate = function(_, _, _, _, webview)
webviewLib.terminate(webview, true)
end,
evalLua = function(value, evalJs, callJs, context, webview)
local f, err = load('local evalJs, callJs, context, webview = ...; '..value)
if f then
return f(evalJs, callJs, context, webview)
else
print('Error', err, 'while loading', value)
end
end,
evalJs = function(value, _, _, _, webview)
webviewLib.eval(webview, value, true)
end,
}
-- Parse command line arguments
local urlArg = arg[1]
if urlArg and urlArg ~= '' then
if urlArg == '-h' or urlArg == '/?' or urlArg == '--help' then
print('Launchs a WebView using the specified URL')
print('Optional arguments: url title width height resizable')
os.exit(0)
end
local protocol = string.match(urlArg, '^([^:]+):.+$')
if protocol == 'http' or protocol == 'https' or protocol == 'file' or protocol == 'data' then
url = urlArg
elseif string.match(urlArg, '^.:\\.+$') or string.match(urlArg, '^/.+$') then
url = 'file://'..tostring(urlArg)
else
print('Invalid URL, to launch a file please use an absolute path')
os.exit(22)
end
end
local title = arg[2] or 'Web View'
local width = arg[3] or 800
local height = arg[4] or 600
local resizable = arg[5] ~= 'false'
local verbose = arg[6] == 'true'
-- Creates the web view
local webview = webviewLib.new(url, title, width, height, resizable)
-- Defines a context that will be shared across Lua calls
local context = {}
-- Setup a Lua function to evaluates JS code
local function evalJs(value)
webviewLib.eval(webview, value, true)
end
-- Setup a Lua function to call JS function,
-- the Lua function arguments are JSON encoded then passed to the JS function
local callJs, jsonLibLoaded, jsonLib
jsonLibLoaded, jsonLib = pcall(require, 'cjson')
if not jsonLibLoaded then
jsonLibLoaded, jsonLib = pcall(require, 'dkjson')
end
if not jsonLibLoaded then
print('Fail to find suitable JSON Lua module')
jsonLib = nil
end
if jsonLib then
callJs = function(functionName, ...)
local args = {...}
local jsArgs = {}
for _, arg in ipairs(args) do
table.insert(jsArgs, jsonLib.encode(arg))
end
local jsString = functionName..'('..table.concat(jsArgs, ',')..')'
webviewLib.eval(webview, jsString, true)
end
end
-- Registers the web view callback that handles the JS requests coming from window.external.invoke()
webviewLib.callback(webview, function(request)
local flag, name, value = string.match(request, '^([%+%-%*]?)([^:]+):(.*)$')
if name then
if flag == '' then
-- Look for the specified request
local fn = requestFunctionMap[name]
if fn then
if verbose then
print('Calling '..name..' with', value)
end
local s, r = pcall(fn, value, evalJs, callJs, context, webview, jsonLib)
if not s then
print('Fail to execute '..name..' due to', r)
end
else
print('Unknown function', name)
end
elseif flag == '-' then
requestFunctionMap[name] = nil
elseif flag == '+' or flag == '*' then
-- Registering the new request using the specified Lua code
local injected = 'local value, evalJs, callJs, context, webview = ...; '
if flag == '*' then
injected = 'local jsonValue, evalJs, callJs, context, webview, jsonLib = ...; local value = jsonLib.decode(jsonValue); '
end
local fn, err = load(injected..value)
requestFunctionMap[name] = fn
if fn then
if verbose then
print('Loaded '..name..' as', value)
end
else
print('Error', err, 'while loading', value)
end
else
print('Invalid flag', flag)
end
else
print('Invalid request', request)
end
end)
-- Runs the web view event loop
webviewLib.loop(webview)
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-- result as attached image
Problem:
Can not use in CE 7.1 : event webview.dll has placed on CE clibs32 or clibs64 folder (I am on windows 7 64bit)
| Code: | local webviewLib = require('webview') -- failed to load or not found
-- or maybe use: (?)
package.loadlib('E:\\ webview.dll','luaopen_webview') |
Any solutions?
| Description: |
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| Filesize: |
78.05 KB |
| Viewed: |
2058 Time(s) |
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