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dummy_server.go
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dummy_server.go
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package http_helper
import (
"fmt"
"net"
"net/http"
"strconv"
"sync/atomic"
"testing"
"github.com/gruntwork-io/terratest/modules/logger"
)
// RunDummyServer runs a dummy HTTP server on a unique port that will return the given text. Returns the Listener for the server, the
// port it's listening on, or an error if something went wrong while trying to start the listener. Make sure to call
// the Close() method on the Listener when you're done!
func RunDummyServer(t *testing.T, text string) (net.Listener, int) {
listener, port, err := RunDummyServerE(t, text)
if err != nil {
t.Fatal(err)
}
return listener, port
}
// RunDummyServerE runs a dummy HTTP server on a unique port that will return the given text. Returns the Listener for the server, the
// port it's listening on, or an error if something went wrong while trying to start the listener. Make sure to call
// the Close() method on the Listener when you're done!
func RunDummyServerE(t *testing.T, text string) (net.Listener, int, error) {
port := getNextPort()
// Create new serve mux so that multiple handlers can be created
server := http.NewServeMux()
server.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
fmt.Fprintf(w, text)
})
logger.Logf(t, "Starting dummy HTTP server in port %d that will return the text '%s'", port, text)
listener, err := net.Listen("tcp", ":"+strconv.Itoa(port))
if err != nil {
return nil, 0, fmt.Errorf("error listening: %s", err)
}
go http.Serve(listener, server)
return listener, port, err
}
// RunDummyServerWithHandlers runs a dummy HTTP server on a unique port that will serve given handlers. Returns the Listener for the server,
// the port it's listening on, or an error if something went wrong while trying to start the listener. Make sure to call
// the Close() method on the Listener when you're done!
func RunDummyServerWithHandlers(t *testing.T, handlers map[string]func(http.ResponseWriter, *http.Request)) (net.Listener, int) {
listener, port, err := RunDummyServerWithHandlersE(t, handlers)
if err != nil {
t.Fatal(err)
}
return listener, port
}
// RunDummyServerWithHandlersE runs a dummy HTTP server on a unique port that will server given handlers. Returns the Listener for the server,
// the port it's listening on, or an error if something went wrong while trying to start the listener. Make sure to call
// the Close() method on the Listener when you're done!
func RunDummyServerWithHandlersE(t *testing.T, handlers map[string]func(http.ResponseWriter, *http.Request)) (net.Listener, int, error) {
port := getNextPort()
for path, handler := range handlers {
http.HandleFunc(path, handler)
}
logger.Logf(t, "Starting dummy HTTP server in port %d", port)
listener, err := net.Listen("tcp", ":"+strconv.Itoa(port))
if err != nil {
return nil, 0, fmt.Errorf("error listening: %s", err)
}
go http.Serve(listener, nil)
return listener, port, err
}
// DO NOT ACCESS THIS VARIABLE DIRECTLY. See getNextPort() below.
var testServerPort int32 = 8080
// Since we run tests in parallel, we need to ensure that each test runs on a different port. This function returns a
// unique port by atomically incrementing the testServerPort variable.
func getNextPort() int {
return int(atomic.AddInt32(&testServerPort, 1))
}