I am just starting with learning web development, Go, and Ajax but I am having trouble seeing what is going wrong. I am trying to simply send data back and forth between the client and the server. With the Ajax request, I am sending data from the form to the server but it does not seem to reach the server because the log doesn't print "in posthandler" which leads me to think something is wrong with the ajax request. Attached is the main.go, index.html, and js/getData.js with all the relevant code.
main.go
package main
import (
"fmt"
"net/http"
"io/ioutil"
"log"
)
var INDEX_HTML []byte
func main(){
fmt.Println("starting server on http://localhost:8888/
value is %s", value)
http.HandleFunc("/", IndexHandler)
http.HandleFunc("/post", PostHandler)
http.ListenAndServe(":8888", nil)
}
func IndexHandler(w http.ResponseWriter, r *http.Request){
log.Println("GET /")
w.Write(INDEX_HTML)
}
func PostHandler(w http.ResponseWriter, r *http.Request){
r.ParseForm()
log.Println("in posthandler", r.Form)
var value = r.FormValue("textfield")
w.Write([]byte(value))
}
func init(){
INDEX_HTML, _ = ioutil.ReadFile("./html/index.html")
}
index.html
<!doctype html>
<html>
<head>
<title>Page Title</title>
<script src="js/getData.js"></script>
</head>
<body>
<form action="/post" method="post">
<textarea type="text" name="input" id="textfield"></textarea>
<br />
<input type="submit" name="button" id="button" value="Send" onclick="loadXMLDoc()"/>
</form>
<div id="fromserver">
</div>
</body>
</html>
js/getData.js
function loadXMLDoc() {
var xmlhttp;
xmlhttp=new XMLHttpRequest();
xmlhttp.onreadystatechange=function()
{
if (xmlhttp.readyState==4 && xmlhttp.status==200)
{
document.getElementById("fromserver").innerHTML=xmlhttp.responseText;
}
}
xmlhttp.open("POST","post",true);
xmlhttp.send();
}
