Worker Request - HTTP Header Size Limit

Developers Workers
1

Doing some rough and arbitrary testing I found that the workers have a request header limit of approximately 32kb.

I also found this:

Could someone confirm this and please add it to the FAQ? It’s rather useful.

Why? Uploading a file as the body, but you want to provide additional metadata. In your worker you will stream the file to storage, while entering the metadata in your DB.

2

Might be some general limit to make sure some system somewhere doesn’t get stuck going through cookies, but I can’t provide a definite answer.

What I can say for certain, though, is that this is common. See: Chen, Jianjun, et al. “Forwarding-Loop Attacks in Content Delivery Networks.” (2016), https://cybersecurity.uga.edu/publications/III.ndss2016.pdf,
Table 4, page 4

image

3 Likes