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[GH-ISSUE #2170] [bug]: Cannot send request using Brave browser + Chrome extension #735

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opened 2026-03-16 16:55:03 +03:00 by kerem · 2 comments

kerem commented

2026-03-16 16:55:03 +03:00

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Originally created by @lucrnz on GitHub (Mar 16, 2022).
Original GitHub issue: https://github.com/hoppscotch/hoppscotch/issues/2170

Is there an existing issue for this?

I have searched the existing issues

Current behavior

When I open the site and try to do a get call against my local Python's http server, the request cannot be sent.

Here is the configuration for the extension.

As you can see the end-point is indeed working.

Developer console:

Here is an error log, that I could gather using dev tools:

{"message":"Failed to execute 'setRequestHeader' on 'XMLHttpRequest': '' is not a valid HTTP header field name.","name":"SyntaxError","stack":"Error: Failed to execute 'setRequestHeader' on 'XMLHttpRequest': '' is not a valid HTTP header field name.\\n at chrome-extension://amknoiejhlmhancpahfcfcfhllgkpbld/index.js:32:1948\\n at Object.g [as forEach] (chrome-extension://amknoiejhlmhancpahfcfcfhllgkpbld/index.js:4:1516)\\n at chrome-extension://amknoiejhlmhancpahfcfcfhllgkpbld/index.js:32:1865\\n at new Promise (<anonymous>)\\n at module.exports (chrome-extension://amknoiejhlmhancpahfcfcfhllgkpbld/index.js:32:379)\\n at module.exports (chrome-extension://amknoiejhlmhancpahfcfcfhllgkpbld/index.js:44:584)"}

Steps to reproduce

Open terminal, create a new folder, make a text file called "hello.txt".
Use python to invoke a simple http server on port 8000. python -m http.server --bind 127.0.0.1 8000
Open the hoppscotch application using the Brave browser (Don't forget to install the Hopscotch Chrome extension)
Try to do a request to the end-point http://localhost:8000/hello.txt
Error should appear.

Environment

Production

Version

Cloud

Originally created by @lucrnz on GitHub (Mar 16, 2022). Original GitHub issue: https://github.com/hoppscotch/hoppscotch/issues/2170 ### Is there an existing issue for this? - [X] I have searched the existing issues ### Current behavior When I open the site and try to do a get call against my local [Python's http server](https://docs.python.org/3/library/http.server.html), the request cannot be sent. ![image](https://user-images.githubusercontent.com/16143806/158660786-e88b3aa1-9ec2-4389-9276-22cc3b384bc1.png) Here is the configuration for the extension. ![image](https://user-images.githubusercontent.com/16143806/158660946-bdc96937-ecad-4cac-b5ab-5b2d39df57e1.png) As you can see the end-point is indeed working. ![image](https://user-images.githubusercontent.com/16143806/158661026-a4cb4d6a-4e51-4310-a743-2752a9275937.png) Developer console: ![image](https://user-images.githubusercontent.com/16143806/158661724-ff8e5426-51a0-4f88-98e7-800fcc2efade.png) Here is an error log, that I could gather using dev tools: ![image](https://user-images.githubusercontent.com/16143806/158661753-7f57b618-c462-44fc-8c8d-a6528c2e945f.png) `{"message":"Failed to execute 'setRequestHeader' on 'XMLHttpRequest': '' is not a valid HTTP header field name.","name":"SyntaxError","stack":"Error: Failed to execute 'setRequestHeader' on 'XMLHttpRequest': '' is not a valid HTTP header field name.\\n at chrome-extension://amknoiejhlmhancpahfcfcfhllgkpbld/index.js:32:1948\\n at Object.g [as forEach] (chrome-extension://amknoiejhlmhancpahfcfcfhllgkpbld/index.js:4:1516)\\n at chrome-extension://amknoiejhlmhancpahfcfcfhllgkpbld/index.js:32:1865\\n at new Promise (<anonymous>)\\n at module.exports (chrome-extension://amknoiejhlmhancpahfcfcfhllgkpbld/index.js:32:379)\\n at module.exports (chrome-extension://amknoiejhlmhancpahfcfcfhllgkpbld/index.js:44:584)"}` ### Steps to reproduce 1. Open terminal, create a new folder, make a text file called "hello.txt". 2. Use python to invoke a simple http server on port 8000. `python -m http.server --bind 127.0.0.1 8000` 3. Open the hoppscotch application using the [Brave browser](https://brave.com/) (Don't forget to install the Hopscotch Chrome extension) 4. Try to do a request to the end-point `http://localhost:8000/hello.txt` 5. Error should appear. ### Environment Production ### Version Cloud

kerem

2026-03-16 16:55:03 +03:00

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kerem commented

2026-03-16 16:55:19 +03:00

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@AndrewBastin commented on GitHub (Mar 16, 2022):

@lucie-cupcakes I am unable to reproduce this in my end, could be some weird type mismatch issue.

Can you switch to the Headers tab and completely clear all the headers defined in it ?

Or you can click on the Arrow to the side of the Send Icon and click on Clear all. This button clears the request configuration to the default one and should fix that in the mean time.

After doing either of the steps and running your request again, does your issue still persist ?

@AndrewBastin commented on GitHub (Mar 16, 2022): @lucie-cupcakes I am unable to reproduce this in my end, could be some weird type mismatch issue. Can you switch to the Headers tab and completely clear all the headers defined in it ? Or you can click on the Arrow to the side of the Send Icon and click on `Clear all`. This button clears the request configuration to the default one and should fix that in the mean time. After doing either of the steps and running your request again, does your issue still persist ? ![image](https://user-images.githubusercontent.com/9131943/158692038-8e0c16b3-7444-40a1-a054-4d81d816c860.png)

kerem commented

2026-03-16 16:55:24 +03:00

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@lucrnz commented on GitHub (Mar 16, 2022):

@AndrewBastin Thanks, that fixed my issue!
Maybe it was a bad cache or something.

@lucrnz commented on GitHub (Mar 16, 2022): @[AndrewBastin](https://github.com/AndrewBastin) Thanks, that fixed my issue! Maybe it was a bad cache or something. ![image](https://user-images.githubusercontent.com/16143806/158693697-f3f635f8-cddc-4d35-87c8-2d0e99e2088d.png)

kerem referenced this issue

2026-03-17 00:30:00 +03:00

[PR #735] [MERGED] chore(deps): bump ace-builds from 1.4.8 to 1.4.9 #2827