This repository is a reproduction for an issue in the Go HTTP package which where data is incorrectly being shared across requests. I don't know if the problem is the client, or the server.
There are a few important things to note:
- This issue occurs when a Go HTTP server writes data in response to a HEAD request.
http.Flusheris not required, but it makes the reproduction more reliable.- This behaviour is only reproducible if the HTTP server makes a HTTP request and writes the response to the client. Just writing a plain string in-memory does not cause this. Making a request and writing anything other than the response also does not cause this.
Go issue: golang/go#68609
Run the server:
❯ go run github.com/uhthomas/go-unsolicited-http/cmd/server@mainRun the client:
❯ go run github.com/uhthomas/go-unsolicited-http/cmd/client@mainServer:
attempt 0
attempt 1
2024/07/26 16:15:47 do: Head "http://localhost:8080": net/http: HTTP/1.x transport connection broken: malformed HTTP status code "html>"
exit status 1Client:
attempt 0
attempt 1
2024/07/26 16:15:47 do: Head "http://localhost:8080": net/http: HTTP/1.x transport connection broken: malformed HTTP status code "html>"
exit status 1Server:
1: 54 bytes written, err=<nil>
2: 0 bytes written, err=readfrom tcp [::1]:8080->[::1]:48336: write tcp [::1]:8080->[::1]:48336: write: broken pipe
3: 54 bytes written, err=<nil>
4: 54 bytes written, err=<nil>
5: 54 bytes written, err=<nil>
6: 54 bytes written, err=<nil>
7: 54 bytes written, err=<nil>
8: 54 bytes written, err=<nil>
9: 54 bytes written, err=<nil>
10: 0 bytes written, err=readfrom tcp [::1]:8080->[::1]:33742: write tcp [::1]:8080->[::1]:33742: write: broken pipeClient:
attempt 0
2024/07/26 16:17:17 Unsolicited response received on idle HTTP channel starting with "<!DOCTYPE html>\n<html>\n <head>\n <title>Thomas</tit"; err=<nil>
attempt 1
2024/07/26 16:17:17 Unsolicited response received on idle HTTP channel starting with "<!DOCTYPE html>\n<html>\n <head>\n <title>Thomas</tit"; err=<nil>
attempt 2
2024/07/26 16:17:17 Unsolicited response received on idle HTTP channel starting with "<!DOCTYPE html>\n<html>\n <head>\n <title>Thomas</tit"; err=<nil>
attempt 3
2024/07/26 16:17:17 Unsolicited response received on idle HTTP channel starting with "<!DOCTYPE html>\n<html>\n <head>\n <title>Thomas</tit"; err=<nil>
attempt 4
2024/07/26 16:17:17 Unsolicited response received on idle HTTP channel starting with "<!DOCTYPE html>\n<html>\n <head>\n <title>Thomas</tit"; err=<nil>
attempt 5
2024/07/26 16:17:17 Unsolicited response received on idle HTTP channel starting with "<!DOCTYPE html>\n<html>\n <head>\n <title>Thomas</tit"; err=<nil>
attempt 6
attempt 7
2024/07/26 16:17:18 do: Head "http://localhost:8080": net/http: HTTP/1.x transport connection broken: malformed HTTP status code "html>"
exit status 1
``