func main() {
//initialize zmq... only once per address space
ctx := mongrel2.MustCreateContext()
//remember to close it
defer func() {
ctx.Close()
}()
//allocate the in and out channels that we'll be using
in := make(chan *mongrel2.HttpRequest)
out := make(chan *mongrel2.HttpResponse)
// this allocates the "raw" abstraction for talking to a mongrel server
// mongrel doc refers to this as a "handler"
handler := &mongrel2.HttpHandlerDefault{&mongrel2.RawHandlerDefault{}}
err := handler.Bind("sample2", ctx)
if err != nil {
fmt.Fprintf(os.Stderr, "error initializing mongrel connection (Bind):%s\n", err)
return
}
//loop forever taking anything mongrel2 sends to us and putting on a channel
go handler.ReadLoop(in)
//loop forever taking anything we put on the out channel and sending to mongrel
go handler.WriteLoop(out)
//lets read 3 messages
for i := 0; i < 3; i++ {
fmt.Printf("waiting on a message from on the in channel...\n")
//blocks!
req := <-in
//create a response to go back to the client
response := new(mongrel2.HttpResponse)
//note: copying the serverid and clientid to target the appropriate browser!
response.ServerId = req.ServerId
response.ClientId = []int{req.ClientId}
//make up a simple body for the user to see
b := fmt.Sprintf("<pre>howdy %s, with client %d!</pre>", req.ServerId, req.ClientId)
response.Body = &stringCloser{strings.NewReader(b)}
response.ContentLength = int64(len(b))
//send it via the channel
out <- response
}
//this is what we have to do to make sure the sent message gets delivered
//before we shut down. this waits 1.5 secs. if you want to get fancy you
//can access the ZMQ out socket and set the linger time to -1. then, when
//you close the context (due to the defer above) it will wait until the message
//is delivered
time.Sleep(1500000)
}
func main() {
//initialize zmq... only once per address space
ctx := mongrel2.MustCreateContext()
//remember to close it
defer func() {
ctx.Close()
}()
//Note: the HttpHandlerDefault is *both* an RawHandler and HttpHandler because
//it borrows the implementation of mongrel2.RawHandlerDefault. These interfaces
//are separated so that one can combine them any way you want, such as an object
//"foo" that is RawHandler, HttpHandler, and JSHandler at the same time. However
//the default implementations combine these together for convenience.
var implementation *mongrel2.HttpHandlerDefault
var httpInterface mongrel2.HttpHandler
var socketInterface mongrel2.RawHandler
var err error
implementation = &mongrel2.HttpHandlerDefault{&mongrel2.RawHandlerDefault{}}
httpInterface = implementation // to illustrate the types
socketInterface = implementation // to illustrate the types
//we want to work with the socket layer first
err = socketInterface.Bind("sample1", ctx)
if err != nil {
fmt.Fprintf(os.Stderr, "error initializing mongrel connection (Bind):%s\n", err)
return
}
fmt.Printf("waiting on a message from the mongrel2 server...\n")
//now we want to work with the http layer... this blocks waiting for a read
req, err := httpInterface.ReadMessage()
if err != nil {
fmt.Fprintf(os.Stderr, "error reading from mongrel connection:%s\n", err)
return
}
// there are many interesting fields in req, but we just print out a couple
fmt.Printf("server %s sent %s from client %d\n", req.ServerId, req.Path, req.ClientId)
//create a response to go back to the client
response := new(mongrel2.HttpResponse)
//note: copying the serverid and clientid to target the appropriate browser!
response.ServerId = req.ServerId
response.ClientId = []int{req.ClientId}
//make up a simple body for the user to see
b := fmt.Sprintf("<pre>hello there, %s with client %d!</pre>", req.ServerId, req.ClientId)
response.Body = &stringCloser{strings.NewReader(b)}
response.ContentLength = int64(len(b))
//send to the mongrel2 server (via the http interface) and it eventually ends up at the browser.
//This does NOT block waiting to send!
err = httpInterface.WriteMessage(response)
//this is what we have to do to make sure the sent message gets delivered
//before we shut down. this waits 1.5 secs. if you want to get fancy you
//can access the ZMQ out socket and set the linger time to -1. then, when
//you close the context (due to the defer above) it will wait until the message
//is delivered
time.Sleep(1500000)
}