119 lines
3.1 KiB
Go
119 lines
3.1 KiB
Go
package main
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import (
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"unsafe"
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"github.com/goplus/llgo/c"
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"github.com/goplus/llgo/c/libuv"
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"github.com/goplus/llgo/c/net"
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)
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var DEFAULT_PORT c.Int = 8080
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var DEFAULT_BACKLOG c.Int = 128
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type WriteReq struct {
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Req libuv.Write
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Buf libuv.Buf
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}
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func main() {
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// Initialize the default event loop
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var loop = libuv.DefaultLoop()
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// Initialize a TCP server
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var server libuv.Tcp
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libuv.InitTcp(loop, &server)
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// Set up the address to bind the server to
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var addr net.SockaddrIn
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libuv.Ip4Addr(c.Str("0.0.0.0"), DEFAULT_PORT, &addr)
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c.Printf(c.Str("Listening on %s:%d\n"), c.Str("0.0.0.0"), DEFAULT_PORT)
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// Bind the server to the specified address and port
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(&server).Bind((*net.SockAddr)(c.Pointer(&addr)), 0)
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res := (*libuv.Stream)(&server).Listen(DEFAULT_BACKLOG, OnNewConnection)
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if res != 0 {
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c.Fprintf(c.Stderr, c.Str("Listen error: %s\n"), libuv.Strerror((libuv.Errno(res))))
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return
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}
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// Start listening for incoming connections
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libuv.Run(loop, libuv.RUN_DEFAULT)
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}
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func FreeWriteReq(req *libuv.Write) {
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wr := (*WriteReq)(c.Pointer(req))
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// Free the buffer base and the WriteReq itself.
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c.Free(c.Pointer(wr.Buf.Base))
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c.Free(c.Pointer(wr))
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}
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func AllocBuffer(handle *libuv.Handle, suggestedSize uintptr, buf *libuv.Buf) {
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// Allocate memory for the buffer based on the suggested size.
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buf.Base = (*c.Char)(c.Malloc(suggestedSize))
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buf.Len = suggestedSize
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}
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func EchoWrite(req *libuv.Write, status c.Int) {
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if status != 0 {
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c.Fprintf(c.Stderr, c.Str("Write error: %s\n"), libuv.Strerror((libuv.Errno(status))))
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}
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FreeWriteReq(req)
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}
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func EchoRead(client *libuv.Stream, nread c.Long, buf *libuv.Buf) {
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if nread > 0 {
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req := (*WriteReq)(c.Malloc(unsafe.Sizeof(WriteReq{})))
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if req == nil {
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c.Fprintf(c.Stderr, c.Str("Failed to allocate memory for write request\n"))
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c.Free(c.Pointer(buf.Base))
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return
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}
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// Initialize the buffer with the data read.
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req.Buf = libuv.InitBuf(buf.Base, c.Uint(nread))
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// Write the data back to the client.
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(&req.Req).Write(client, &req.Buf, 1, EchoWrite)
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return
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}
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if nread < 0 {
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// Handle read errors and EOF.
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if (libuv.Errno)(nread) != libuv.EOF {
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c.Fprintf(c.Stderr, c.Str("Read error: %s\n"), libuv.Strerror((libuv.Errno)(nread)))
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}
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(*libuv.Handle)(c.Pointer(client)).Close(nil)
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}
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// Free the buffer if it's no longer needed.
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if buf.Base != nil {
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c.Free(c.Pointer(buf.Base))
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}
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}
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func OnNewConnection(server *libuv.Stream, status c.Int) {
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if status < 0 {
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c.Fprintf(c.Stderr, c.Str("New connection error: %s\n"), libuv.Strerror(libuv.Errno(status)))
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return
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}
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// Allocate memory for a new client.
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client := (*libuv.Tcp)(c.Malloc(unsafe.Sizeof(libuv.Tcp{})))
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if client == nil {
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c.Fprintf(c.Stderr, c.Str("Failed to allocate memory for client\n"))
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return
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}
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// Initialize the client TCP handle.
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if libuv.InitTcp(libuv.DefaultLoop(), client) < 0 {
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c.Fprintf(c.Stderr, c.Str("Failed to initialize client\n"))
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c.Free(c.Pointer(client))
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return
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}
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// Accept the new connection and start reading data.
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if server.Accept((*libuv.Stream)(client)) == 0 {
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(*libuv.Stream)(client).StartRead(AllocBuffer, EchoRead)
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} else {
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(*libuv.Handle)(c.Pointer(client)).Close(nil)
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}
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}
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