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[GH-ISSUE #1341] scripting always fails with reference to __mapSwiftArrayToJSObject unless async #1334

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opened 2026-03-03 19:50:36 +03:00 by kerem · 6 comments

kerem commented

2026-03-03 19:50:36 +03:00

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Originally created by @ddissett on GitHub (Aug 31, 2022).
Original GitHub issue: https://github.com/ProxymanApp/Proxyman/issues/1341

Originally assigned to: @NghiaTranUIT on GitHub.

Proxyman version? (Ex. Proxyman 1.4.3)

Version 3.8.0 (30800)

macOS Version? (Ex. mac 10.14)

10.14.6 (18G9323)

Steps to reproduce

Fresh install
create sync scripting item targeting any https: page that includes onResponse() and/or onRequest() function(s):

function onRequest(context, url, request) {
console.log(request);
return request;
}

function onResponse(context, url, request, response) {
console.log(response);
return response;
}

Expected behavior

request and/or response on* function is called and request and/or response object is logged to the console what that page is loaded thru the proxy

Screenshots (optional)

Instead the function(s) fail with the following errors:

01:22:15.071: [onRequest] with Request ID=165
Run onRequest() func as normal (sync) mode
❌Error: ReferenceError: Can't find variable: __mapSwiftArrayToJSObject

01:22:15.227: [onResponse] with Request ID=165
Run onResponse() func as normal (sync) mode
❌Error: ReferenceError: Can't find variable: __mapSwiftArrayToJSObject

This happens for every script I've tried to create both in the public and Setapp versions of Proxyman.

If I change the functions to async, I do not get the error message, but the onRequest and/or onResponse functions don't appear to run.

Originally created by @ddissett on GitHub (Aug 31, 2022). Original GitHub issue: https://github.com/ProxymanApp/Proxyman/issues/1341 Originally assigned to: @NghiaTranUIT on GitHub. ### Proxyman version? (Ex. Proxyman 1.4.3) Version 3.8.0 (30800) ### macOS Version? (Ex. mac 10.14) 10.14.6 (18G9323) ### Steps to reproduce 1) Fresh install 2) create sync scripting item targeting any https: page that includes onResponse() and/or onRequest() function(s): function onRequest(context, url, request) { console.log(request); return request; } function onResponse(context, url, request, response) { console.log(response); return response; } ### Expected behavior request and/or response on* function is called and request and/or response object is logged to the console what that page is loaded thru the proxy ### Screenshots (optional) ![CleanShot 2022-08-31 at 01 24 46](https://user-images.githubusercontent.com/80232560/187634008-dd438bf5-fa35-476b-ae12-62591abe6ce3.jpg) Instead the function(s) fail with the following errors: ---------------------------------- 01:22:15.071: [onRequest] with Request ID=165 Run onRequest() func as normal (sync) mode ❌Error: ReferenceError: Can't find variable: __mapSwiftArrayToJSObject ---------------------------------- 01:22:15.227: [onResponse] with Request ID=165 Run onResponse() func as normal (sync) mode ❌Error: ReferenceError: Can't find variable: __mapSwiftArrayToJSObject This happens for every script I've tried to create both in the public and Setapp versions of Proxyman. If I change the functions to async, I do not get the error message, but the onRequest and/or onResponse functions don't appear to run.

kerem commented

2026-03-03 19:50:37 +03:00

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Owner

@NghiaTranUIT commented on GitHub (Aug 31, 2022):

Thanks for the report @ddissett, but I could not reproduce it with a POST Request (JSON Both).

If you don't mind, what kind of your request?

Have Query?
Body Type (JSON, form, Text, Raw Data, ...)
Content-Type of the Request/Response Header.

I'd like to investigate it 👍

@NghiaTranUIT commented on GitHub (Aug 31, 2022): Thanks for the report @ddissett, but I could not reproduce it with a POST Request (JSON Both). <img width="1840" alt="Screen Shot 2022-08-31 at 15 38 51" src="https://user-images.githubusercontent.com/5878421/187635588-2272064b-dc73-491a-bb19-8ef3456efd89.png"> If you don't mind, what kind of your request? - Have Query? - Body Type (JSON, form, Text, Raw Data, ...) - Content-Type of the Request/Response Header. I'd like to investigate it 👍

kerem commented

2026-03-03 19:50:37 +03:00

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Owner

@ddissett commented on GitHub (Sep 19, 2022):

Hello, sorry for the delayed response. Here is some more information. I am able to reproduce the problem with just about any request. Therefore, here is a very simple example with a request against the web server running on my mac:

GET /~ddissett/ HTTP/1.1
Host: continuity
Upgrade-Insecure-Requests: 1
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.6,2 Safari/605.1.15
Accept-Language: en-US,en;q=0.9
Accept-Encoding: gzip, deflate
Connection: keep-alive
Pragma: no-cache
Cache-Control: no-cache

Here is the response headers:

HTTP/1.1 200 OK
Date: Mon, 19 Sep 2022 17:04:47 GMT
Server: Apache/2.4.34 (Unix) LibreSSL/2.5.5 mod_perl/2.0.9 Perl/v5.18.4
Keep-Alive: timeout=5, max=100
Connection: Keep-Alive
Transfer-Encoding: chunked
Content-Type: text/html;charset=UTF-8
Expires: 0
Cache-Control: no-cache

I've attached a screenshot of the script and console output. Note: the first two items in the console (10:04:36) are from the displayed script but with async function rather than function on lines 1 and 6. I don't know if this is related, but note that the request and response objects logged in lines 2 and 7 are not in the log. In fact, I can't get an async function to do anything it seems. The next two log items (10:04:47) show the problem at hand (no async in front of the function def).

@ddissett commented on GitHub (Sep 19, 2022): Hello, sorry for the delayed response. Here is some more information. I am able to reproduce the problem with just about any request. Therefore, here is a very simple example with a request against the web server running on my mac: GET /~ddissett/ HTTP/1.1 Host: continuity Upgrade-Insecure-Requests: 1 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.6,2 Safari/605.1.15 Accept-Language: en-US,en;q=0.9 Accept-Encoding: gzip, deflate Connection: keep-alive Pragma: no-cache Cache-Control: no-cache Here is the response headers: HTTP/1.1 200 OK Date: Mon, 19 Sep 2022 17:04:47 GMT Server: Apache/2.4.34 (Unix) LibreSSL/2.5.5 mod_perl/2.0.9 Perl/v5.18.4 Keep-Alive: timeout=5, max=100 Connection: Keep-Alive Transfer-Encoding: chunked Content-Type: text/html;charset=UTF-8 Expires: 0 Cache-Control: no-cache I've attached a screenshot of the script and console output. Note: the first two items in the console (10:04:36) are from the displayed script but with `async function` rather than `function` on lines 1 and 6. I don't know if this is related, but note that the request and response objects logged in lines 2 and 7 are not in the log. In fact, I can't get an `async function` to do anything it seems. The next two log items (10:04:47) show the problem at hand (no `async` in front of the function def). ![image](https://user-images.githubusercontent.com/80232560/191080356-53c9b7a3-1696-439f-8b61-b653f3b9387e.png)

kerem commented

2026-03-03 19:50:37 +03:00

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Owner

@NghiaTranUIT commented on GitHub (Sep 20, 2022):

It seems that you're using very old macOS version, which is Intel Mac OS X 10_15_6.

I could not reproduce it on macOS 12.6, so it's guessed fixed. Please try this build: https://proxyman.s3.us-east-2.amazonaws.com/beta/Proxyman_3.10.0_Fix_scripting.dmg

I explicitly evaluate the __mapSwiftArrayToJSObject function, so it's always available.

@NghiaTranUIT commented on GitHub (Sep 20, 2022): It seems that you're using very old macOS version, which is Intel Mac OS X 10_15_6. I could not reproduce it on macOS 12.6, so it's guessed fixed. Please try this build: https://proxyman.s3.us-east-2.amazonaws.com/beta/Proxyman_3.10.0_Fix_scripting.dmg I explicitly evaluate the `__mapSwiftArrayToJSObject` function, so it's always available.

kerem commented

2026-03-03 19:50:37 +03:00

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Owner

@ddissett commented on GitHub (Sep 21, 2022):

Yes. I am using an upgraded Mac Pro 4,1 and Mojave is the last version of MacOS supported on that hardware. I plan on inkling OpenCore so I can run unsupported versions, but that is a big project from what I understand.

will try in the version you posted. Thank you!

@ddissett commented on GitHub (Sep 21, 2022): Yes. I am using an upgraded Mac Pro 4,1 and Mojave is the last version of MacOS supported on that hardware. I plan on inkling OpenCore so I can run unsupported versions, but that is a big project from what I understand. will try in the version you posted. Thank you!

kerem commented

2026-03-03 19:50:37 +03:00

Author

Owner

@ddissett commented on GitHub (Sep 21, 2022):

It still doesn't work with the version you posted and there's an additional error message now:

with async function:

----------------------------------
22:42:13.717: [onRequest] with Request ID=127
Run onRequest() func with async/await mode
❌Error: SyntaxError: Unexpected token '.' 
----------------------------------
22:42:13.747: [onResponse] with Request ID=127
Run onResponse() func with async/await mode

with no async:

----------------------------------
22:44:57.129: [onRequest] with Request ID=144
Run onRequest() func as normal (sync) mode
❌Error: ReferenceError: Can't find variable: __mapSwiftArrayToJSObject 
❌Error: SyntaxError: Unexpected token '.' 
----------------------------------
22:44:57.158: [onResponse] with Request ID=144
Run onResponse() func as normal (sync) mode
❌Error: ReferenceError: Can't find variable: __mapSwiftArrayToJSObject

@ddissett commented on GitHub (Sep 21, 2022): It still doesn't work with the version you posted and there's an additional error message now: with `async function`: ---------------------------------- 22:42:13.717: [onRequest] with Request ID=127 Run onRequest() func with async/await mode ❌Error: SyntaxError: Unexpected token '.' ---------------------------------- 22:42:13.747: [onResponse] with Request ID=127 Run onResponse() func with async/await mode with no `async`: ---------------------------------- 22:44:57.129: [onRequest] with Request ID=144 Run onRequest() func as normal (sync) mode ❌Error: ReferenceError: Can't find variable: __mapSwiftArrayToJSObject ❌Error: SyntaxError: Unexpected token '.' ---------------------------------- 22:44:57.158: [onResponse] with Request ID=144 Run onResponse() func as normal (sync) mode ❌Error: ReferenceError: Can't find variable: __mapSwiftArrayToJSObject

kerem commented

2026-03-03 19:50:38 +03:00

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Owner

@ddissett commented on GitHub (Apr 4, 2025):

I suggest this be closed not planned stale. Its no longer relevant to me and probably no one else. Thanks.

@ddissett commented on GitHub (Apr 4, 2025): I suggest this be closed not planned stale. Its no longer relevant to me and probably no one else. Thanks.