[Question]: Why are http examples incompatible with MicroPython urequests

[joyanhui]

Actions I've taken before I'm here

• I've thoroughly read the documentations about this problem but still have no answer.
• I've searched the Github Issues/Discussions but didn't find any similar problems that have been solved.
• I've searched the internet for this problem but didn't find anything helpful.

Questions with details

import urequests
response = urequests.get("http://10.1.1.75:9080/")
data = response.text
print(data)

Traceback (most recent call last):
  File "<stdin>", line 2, in <module>
  File "urequests.py", line 180, in get
  File "urequests.py", line 125, in request
OSError: [Errno 104] ECONNRESET

curl:

curl http://10.1.1.75:9080/
Hello World!%   

Code snippets (optional)

package main

import (
	"flag"
	"fmt"
	"log"
	"time"

	"github.com/evanphx/wildcat"
	"github.com/panjf2000/gnet/v2"
)

var (
	errMsg      = "Internal Server Error"
	errMsgBytes = []byte(errMsg)
)

type httpServer struct {
	gnet.BuiltinEventEngine

	addr      string
	multicore bool
	eng       gnet.Engine
}

type httpCodec struct {
	parser *wildcat.HTTPParser
	buf    []byte
}

func (hc *httpCodec) appendResponse() {
	hc.buf = append(hc.buf, "HTTP/1.1 200 OK\r\nServer: gnet\r\nContent-Type: text/plain\r\nDate: "...)
	hc.buf = time.Now().AppendFormat(hc.buf, "Mon, 02 Jan 2006 15:04:05 GMT")
	hc.buf = append(hc.buf, "\r\nContent-Length: 12\r\n\r\nHello World!"...)
}

func (hs *httpServer) OnBoot(eng gnet.Engine) gnet.Action {
	hs.eng = eng
	log.Printf("echo server with multi-core=%t is listening on %s\n", hs.multicore, hs.addr)
	return gnet.None
}

func (hs *httpServer) OnOpen(c gnet.Conn) ([]byte, gnet.Action) {
	c.SetContext(&httpCodec{parser: wildcat.NewHTTPParser()})
	return nil, gnet.None
}

func (hs *httpServer) OnTraffic(c gnet.Conn) gnet.Action {
	hc := c.Context().(*httpCodec)
	buf, _ := c.Next(-1)

pipeline:
	headerOffset, err := hc.parser.Parse(buf)
	if err != nil {
		c.Write(errMsgBytes)
		return gnet.Close
	}
	hc.appendResponse()
	bodyLen := int(hc.parser.ContentLength())
	if bodyLen == -1 {
		bodyLen = 0
	}
	buf = buf[headerOffset+bodyLen:]
	if len(buf) > 0 {
		goto pipeline
	}

	c.Write(hc.buf)
	hc.buf = hc.buf[:0]
	return gnet.None
}

func main() {
	var port int
	var multicore bool

	// Example command: go run main.go --port 8080 --multicore=true
	flag.IntVar(&port, "port", 9080, "server port")
	flag.BoolVar(&multicore, "multicore", true, "multicore")
	flag.Parse()

	hs := &httpServer{addr: fmt.Sprintf("tcp://:%d", port), multicore: multicore}

	// Start serving!
	log.Println("server exits:", gnet.Run(hs, hs.addr, gnet.WithMulticore(multicore)))
}