missing various net/http packages in std

[Flo4604]

I am currently trying to build my net/http server and getting various errors

Running: tinygo build -o ./build/app.wasm -target wasm -no-debug ./cmd/main.go

package net/http/httptest is not in std
package net/http/httptrace is not in std
package net/http/cookiejar is not in std
package net/http/httputil is not in std

Anything I can do to bypass this?

[elewis787]

According to https://tinygo.org/docs/reference/lang-support/stdlib/#nethttphttptrace the packages you are trying to import are not supported.

Can you share more about what you are trying to do with the HTTP server? I see you are targeting wasm.

HTTP in WASM can be tricky. However, there are a few examples of how you can use wasip2 and a runtime such as wasmtime to run something close.

Here is one project https://github.com/rajatjindal/wasi-go-sdk/tree/main/examples. Wasmcloud, Spin, Wasmtime, and Extistim are a few tools you could look into if you are working with wasm server side.

If you are using wasm in the browser, that will be a different story.

[Flo4604]

I was trying to use https://github.com/syumai/workers, but my current HTTP Server has a lot more extra dependencies such as tracing, so I think its just not cut out for my case atm.

I will look into wasip2 and see if cloudflare has support for that. Thanks for the reply and sorry for not reading docs first

[inliquid]

I have same issue when trying to build module, which imports quite complex *.proto definitions:

$ tinygo build -o wasm/plugin.wasm -scheduler=none -target=wasip1 --no-debug ./wasm
../../../../pkg/mod/golang.org/x/net@v0.30.0/http2/transport.go:26:2: package net/http/httptrace is not in std (/home/***/.cache/tinygo/goroot-8cbcb1d9555609a60075264735fce03217a624835ebf583eb96aa0c5bf08e840/src/net/http/httptrace)
../../../../pkg/mod/google.golang.org/grpc@v1.66.0-dev/internal/transport/proxy.go:29:2: package net/http/httputil is not in std (/home/***/.cache/tinygo/goroot-8cbcb1d9555609a60075264735fce03217a624835ebf583eb96aa0c5bf08e840/src/net/http/httputil)

I think problem is there and needs to be fixed. Can we keep issue open, or should I open another one?

[elewis787]

@inliquid - I believe the main problem is the deps that are getting pulled in by grpc.

One solve for this would not be handled in tiny-go. Recently the tiny-go net package was updated to handle custom transports for HTTP. This was a core requirement for getting HTTP in wasi working IMO.

There might be something that could be done using a similar pattern but it will be in the packages uses x/net or grpc.

Otherwise, you are right these packages would need to be pulled over into tinygo - I haven't looked into that but my guess is that is fairly far out - just a guess tho.

I don't see a problem leaving this issue open - but I would also recommend looking here https://github.com/tinygo-org/net to see what we could do.

[inliquid]

Otherwise, you are right these packages would need to be pulled over into tinygo - I haven't looked into that but my guess is that is fairly far out - just a guess tho.

I would like to be able to just compile these dependencies into my Wasm modules. And I see a lot of progress, previously there were much more scaring compiler errors, now when reflect support is there, only those left. At the moment I have to regenerate these *.proto definitions using alternative generators. So can you please reopen it, and keep for tracking of similar issues? I understand that it's not that easy.

[inliquid]

Opened #4598.