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Ifc.js: wasm streaming compile failed: LinkError: import object field 'a' is not a Memory

I am reading IFC files and ifc.js seemed like a solid option although I am not so experienced with javascript but I thought it could be a good opportunity to learn about it.
I followed the documentation example that can be food here ``https://ifcjs.github.io/info/docs/Hello%20world```.
I packed the app inside of a django project and everything is fine until I try to load up a file.
I am getting the following error:
RuntimeError: abort(LinkError: import object field 'a' is not a Memory). Build with -s ASSERTIONS=1 for more info.
On my browser debugger, the error links to the following class of my bundle.js file
class IFCLoader extends Loader {
constructor(manager) {
super(manager);
this.ifcManager = new IFCManager();
}
load(url, onLoad, onProgress, onError) {
const scope = this;
const loader = new FileLoader(scope.manager);
this.onProgress = onProgress;
loader.setPath(scope.path);
loader.setResponseType('arraybuffer');
loader.setRequestHeader(scope.requestHeader);
loader.setWithCredentials(scope.withCredentials);
loader.load(url, async function (buffer) {
try {
if (typeof buffer == 'string') {
throw new Error('IFC files must be given as a buffer!');
}
onLoad(await scope.parse(buffer));
} catch (e) {
if (onError) {
onError(e);
} else {
console.error(e);
}
I have no clue how to correct this issue and any help would be highly appreciated. I am happy to post additional files or code if needed. Thanks

Change extension from .ff to .ff.js improve speed?

Ey! I recently made a small framework to build my small webpages and projects on top.
Today i'm checking a lot of articles about tricks to speed up stuff. I'm interested in improve xhr speed.
I been reading and found some file extensions get usually cached by default and others don't.
I use a filename.ff special extension on my frameworks to known what files i want to fech when accessing a resource.
As a live example
https://bugs.stringmanolo.ga/#projects/fastframework is being downloaded from https://github.com/StringManolo/bugWriteups/blob/master/projects/fastframework/fastframework.ff using XHR when you click the fastframework link in this page https://bugs.stringmanolo.ga/#projects
My question is:
If i change the extension from fastframework.ff to fastframework.ff.js is the file getting cached by the browser and then it will be downloaded faster? Also will be working offline? Or it's already cached? Changing the framework code to use .ff.js isn't going to make a diference at all?

I finally solved it in a better way using service workers and cache api.
I let you the code i used here, so maybe is helpfull to someone in the future.
ff.js (ff is a ff = {} object)
/*** Cache Service Workers Code */
ff.cache = {}
ff.cache.resources = [];
ff.cache.start = function(swName, ttl) {
let tl = 0;
tl = localStorage.cacheTTL;
if (+tl) {
const now = new Date();
if (now.getTime() > +localStorage.cacheTTL) {
localStorage.cacheTTL = 0;
caches.delete("cachev1").then(function() {
});
}
} else {
navigator.serviceWorker.register(swName, {
scope: './'
})
.then(function(reg) {
caches.open("cachev1")
.then(function(cache) {
cache.addAll(ff.cache.resources)
.then(function() {
localStorage.cacheTTL = +(new Date().getTime()) + +ttl;
});
});
})
.catch(function(err) {
});
}
};
ff.cache.clean = function() {
caches.delete("cachev1").then(function() {
});
};
/* End Cache Service Workers Code ***/
cache.js (this is the service worker intercepting the requests)
self.addEventListener('fetch', (e) => {
e.respondWith(caches.match(e.request).then((response) => {
if(response)
return response
else
return fetch(e.request)
}) )
})
main.js (this is the main file included into the index.html file)
ff.cache.resources = [
"./logs/dev/historylogs.ff",
"./blogEntries/xss/xss1.ff",
"./blogEntries/xss/w3schoolsxss1.ff",
"./blogEntries/csrf/w3schoolscsrf1.ff",
"./projects/fastframework/fastframework.ff",
"./projects/jex/jex.ff",
"./ff.js",
"./main.js",
"./main.css",
"./index.html",
"./resources/w3schoolspayload.png",
"./resources/w3schoolsxsslanscape.png",
"./resources/w3schoolsxss.png"];
ff.cache.start("./cache.js", 104800000);
/* 604800000 milliseconds equals 1 week */
You can test it live in https://bugs.stringmanolo.ga/index.html is hosted from github repo in case you need to see more code.

Mirth Connect: Javascript Reader - Error listing files in dir (shared folder)

I have a trouble when accessing domain's shared folder by Javascript Reader.
it was still running fine until one day it got an error(as below) at catch block.
I restarted the Mirth Service and it works again.
It repeated that many times.
Does anyone know the cause and how to fix it?
Thank you!
My code and the error are as below
Code:
try {
var username = sharedAuth.username;
// If domain exist, login by domain
if (!isEmpty(sharedAuth.domain)) {
username = sharedAuth.domain+'#'+sharedAuth.username;
}
// Domain user format: DOMAIN#user
var options = new com.mirth.connect.connectors.file.FileSystemConnectionOptions(false, username, sharedAuth.password, null);
//logger.debug('=============222====='+username);
var fileConn = new com.mirth.connect.connectors.file.filesystems.SmbFileConnection(sharedHost, options, 5000);
//logger.debug('=============333====='+fileConn);
var arrayFileList = [];
if (fileConn != null) {
var fileList = fileConn.listFiles(sharedPath, '^(ORM|PHY|MDM|ADT|ORU-RPT)_\\w{2}_\\d{14,100}.xml$', true, false);
...
}
} catch (e) {
logger.error('[Source] Error: '+e.message);
logger.error(e);
} finally {
fileConn.destroy();
}
Error:
ERROR 2020-09-24 10:25:31,030 [JavaScript Reader JavaScript Task on ProcessHISOutputXML_SMB_v3_WOR (71600861-ed6f-4004-a8b3-cc7d059f6f5c) < pool-1-thread-1] ProcessHISOutputXML_SMB_v3_WOR-js-connector: [Source] Error: com.mirth.connect.connectors.file.FileConnectorException: Error listing files in dir [his_ris] for pattern [^(ORM|PHY|MDM|ADT|ORU-RPT)_\w{2}_\d{14,100}.xml$]
ERROR 2020-09-24 10:25:31,031 [JavaScript Reader JavaScript Task on ProcessHISOutputXML_SMB_v3_WOR (71600861-ed6f-4004-a8b3-cc7d059f6f5c) < pool-1-thread-1] ProcessHISOutputXML_SMB_v3_WOR-js-connector: JavaException: com.mirth.connect.connectors.file.FileConnectorException: Error listing files in dir [his_ris] for pattern [^(ORM|PHY|MDM|ADT|ORU-RPT)_\w{2}_\d{14,100}.xml$]

What release of Mirth are you on? There was a bug in 3.9.0 that caused memory leaks in the SMB reader library, see https://github.com/nextgenhealthcare/connect/issues/4387.

How do I write a LZ compressed string to text file using JXA?

I am trying to write a JXA script in Apple Script Editor, that compresses a string using the LZ algorithm and writes it to a text (JSON) file:
var story = "Once upon a time in Silicon Valley..."
var storyC = LZString.compress(story)
var data_to_write = "{\x22test\x22\x20:\x20\x22"+storyC+"\x22}"
app.displayAlert(data_to_write)
var desktopString = app.pathTo("desktop").toString()
var file = `${desktopString}/test.json`
writeTextToFile(data_to_write, file, true)
Everything works, except that the LZ compressed string is just transformed to a set of "?" by the time it reaches the output file, test.json.
It should look like:
{"test" : "㲃냆੠Њޱᐈ攀렒삶퓲ٔ쀛䳂䨀푖㢈Ӱນꀀ"}
Instead it looks like:
{"test" : "????????????????????"}
I have a feeling the conversion is happening in the app.write command used by the writeTextToFile() function (which I pulled from an example in Apple's Mac Automation Scripting Guide):
var app = Application.currentApplication()
app.includeStandardAdditions = true
function writeTextToFile(text, file, overwriteExistingContent) {
try {
// Convert the file to a string
var fileString = file.toString()
// Open the file for writing
var openedFile = app.openForAccess(Path(fileString), { writePermission: true })
// Clear the file if content should be overwritten
if (overwriteExistingContent) {
app.setEof(openedFile, { to: 0 })
}
// Write the new content to the file
app.write(text, { to: openedFile, startingAt: app.getEof(openedFile) })
// Close the file
app.closeAccess(openedFile)
// Return a boolean indicating that writing was successful
return true
}
catch(error) {
try {
// Close the file
app.closeAccess(file)
}
catch(error) {
// Report the error is closing failed
console.log(`Couldn't close file: ${error}`)
}
// Return a boolean indicating that writing was successful
return false
}
}
Is there a substitute command for app.write that maintains the LZ compressed string / a better way to accomplish what I am trying to do?
In addition, I am using the readFile() function (also from the Scripting Guide) to load the LZ string back into the script:
function readFile(file) {
// Convert the file to a string
var fileString = file.toString()
// Read the file and return its contents
return app.read(Path(fileString))
}
But rather than returning:
{"test" : "㲃냆੠Њޱᐈ攀렒삶퓲ٔ쀛䳂䨀푖㢈Ӱນꀀ"}
It is returning:
"{\"test\" : \"㲃냆੠Њޱᐈ攀렒삶퓲ٔ쀛䳂䨀푖㢈Ӱນꀀ\"}"
Does anybody know a fix for this too?
I know that it is possible to use Cocoa in JXA scripts, so maybe the solution lies therein?
I am just getting to grips with JavaScript so I'll admit trying to grasp Objective-C or Swift is way beyond me right now.
I look forward to any solutions and/or pointers that you might be able to provide me. Thanks in advance!

After some further Googl'ing, I came across these two posts:
How can I write UTF-8 files using JavaScript for Mac Automation?
read file as class utf8
I have thus altered my script accordingly.
writeTextToFile() now looks like:
function writeTextToFile(text, file) {
// source: https://stackoverflow.com/a/44293869/11616368
var nsStr = $.NSString.alloc.initWithUTF8String(text)
var nsPath = $(file).stringByStandardizingPath
var successBool = nsStr.writeToFileAtomicallyEncodingError(nsPath, false, $.NSUTF8StringEncoding, null)
if (!successBool) {
throw new Error("function writeFile ERROR:\nWrite to File FAILED for:\n" + file)
}
return successBool
};
While readFile() looks like:
ObjC.import('Foundation')
const readFile = function (path, encoding) {
// source: https://github.com/JXA-Cookbook/JXA-Cookbook/issues/25#issuecomment-271204038
pathString = path.toString()
!encoding && (encoding = $.NSUTF8StringEncoding)
const fm = $.NSFileManager.defaultManager
const data = fm.contentsAtPath(pathString)
const str = $.NSString.alloc.initWithDataEncoding(data, encoding)
return ObjC.unwrap(str)
};
Both use Objective-C to overcome app.write and app.read's inability to handle UTF-8.

Using PhoneGap FileWriter.write for "big" files

I have a problem in my PhoneGap app. I would like to write a file of 15 MB. If I try the OS pulls more and more memory and the app crashes without message. I can reproduce this on android and blackberry tablets. Is there a way to implement the writing more efficient?
best regards
fe.createWriter(
(fw: any) => {
fw.onwriteend = (e) => {
fw.onwriteend = (e) => {
callback();
}
fw.write(data);
}
// write BOM (dead for now)
fw.write("");
},
(error: any) => {
alert("FileWriter Failed: " + error.code);
});
It's TypeScript, I hope JS developers won't struggle with this ;)

I found the answer.
Crash reason:
PhoneGap FileWrite.write cannot handle too big buffer, do not know exact size, I think
this issue is due to PG transfer data to iOS through URL Scheme, somehow it crash when
"URL" is too long.
How to fix it: write small block every time, code below:
function gotFileWriter(writer) {
function writeFinish() {
// ... your done code here...
}
var written = 0;
var BLOCK_SIZE = 1*1024*1024; // write 1M every time of write
function writeNext(cbFinish) {
var sz = Math.min(BLOCK_SIZE, data.byteLength - written);
var sub = data.slice(written, written+sz);
writer.write(sub);
written += sz;
writer.onwrite = function(evt) {
if (written < data.byteLength)
writeNext(cbFinish);
else
cbFinish();
};
}
writeNext(writeFinish);
}
UPDATE Aug 12,2014:
In my practice, the performance of saving file through Cordova FileSystem is not good, especially for large file(>5M) on phone, it takes a few seconds. If you are downloading file from server to local disk, you may want a "efficient and direct" way, try cordova-plugin-file-transfer plugin.

#Imskull's answer is the correct one ... i just want to put in the one for Blob (make sure it is blob and not arraybuffer) which is updated based on the one on top ... what i also added was a line to assure myself i am adding to the end of file ... it is more than enough to make ur app stop crashing (on ios mainly :P )
function gotFileWriter(writer) {
function writeFinish() {
// ... your done code here...
}
var written = 0;
var BLOCK_SIZE = 1*1024*1024; // write 1M every time of write
function writeNext(cbFinish) {
writer.onwrite = function(evt) {
if (written < data.size)
writeNext(cbFinish);
else
cbFinish();
};
if (written) writer.seek(writer.length);
writer.write(data.slice(written, written + Math.min(BLOCK_SIZE, data.size - written)));
written += Math.min(BLOCK_SIZE, data.size - written);
}
writeNext(writeFinish);
}