Regression in #914

[papandreou]

A project of mine has been using htmlparser2 since 3.7.3, but when I upgrade from 7.0.0 to 7.1.0 or above, every test fails with this error:

     Uncaught TypeError: this.buffer.charCodeAt is not a function
      at Tokenizer.parse (node_modules/htmlparser2/lib/Tokenizer.js:628:33)
      at Tokenizer.write (node_modules/htmlparser2/lib/Tokenizer.js:111:14)
      at Parser.write (node_modules/htmlparser2/lib/Parser.js:382:24)
      at Transform.<anonymous> (lib/expressExtractHeaders.js:165:28)
      at Transform.Readable.read (_stream_readable.js:507:10)
      at flow (_stream_readable.js:1007:34)
      at resume_ (_stream_readable.js:988:3)
      at processTicksAndRejections (internal/process/task_queues.js:84:21)

Here's a failing build: https://github.com/papandreou/express-extractheaders/runs/3980571638?check_suite_focus=true#step:5:1615

I bisected it down to this commit:

a2eae5164a58e8957a6b7d968d81b03ca44cb375 is the first bad commit
commit a2eae5164a58e8957a6b7d968d81b03ca44cb375
Author: Felix Böhm <[email protected]>
Date:   Mon Aug 23 13:00:32 2021 +0100

    refactor(tokenizer): Remove unused branches, improve test coverage (#914)
    
    `Tokenizer`'s `option` argument can no longer be `null`, and we no longer check for unknown states.

 src/Tokenizer.ts                                   | 36 +++++++++-------------
 src/__fixtures__/Events/37-entity-in-title.json    |  2 +-
 .../Events/41-trailing-legacy-entity.json          | 10 ++++++
 .../Events/42-trailing-numeric-entity.json         | 10 ++++++
 4 files changed, 36 insertions(+), 22 deletions(-)
 create mode 100644 src/__fixtures__/Events/41-trailing-legacy-entity.json
 create mode 100644 src/__fixtures__/Events/42-trailing-numeric-entity.json

[fb55]

Thanks for the report! #914 removed the ability to pass buffers to the parser, which was accidentally supported before.

There are some edge-cases when passing buffers directly to htmlparser2 — see #128. htmlparser2/lib/WritableStream solves this by using a string decoder.

I will reinstate support for parsing buffers here, but in a deprecated state. This will be dropped in the next major release. Hope this is a good compromise!

[papandreou]

Thanks a lot for looking into it! I've put out express-extractheaders 4.0.1 that avoids buffers so I'm prepared for the next major release :)