我刚刚开始学习 Web 开发、Go 和 Ajax，但我无法看出哪里出了问题。我试图简单地在客户端和服务器之间来回发送数据。对于 Ajax 请求，我将数据从表单发送到服务器，但它似乎没有到达服务器，因为日志没有打印“在 posthandler”，这让我认为 ajax 请求有问题。附件是 main.go、index.html 和 js/getData.js 以及所有相关代码。main.gopackage mainimport ( "fmt" "net/http" "io/ioutil" "log")var INDEX_HTML []bytefunc main(){ fmt.Println("starting server on http://localhost:8888/\nvalue 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")}索引.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.jsfunction 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();}
1 回答
慕仙森
TA贡献1827条经验 获得超7个赞
有两件事：
没有处理程序呈现资源（在本例中为 js/ .）
由于“提交”HTML 元素，表单本身被提交。
这是您更新的代码
main.go
package main
import (
"fmt"
"io/ioutil"
"log"
"net/http"
)
var INDEX_HTML []byte
func main() {
fmt.Println("starting server on http://localhost:8888/\nvalue is %s", "asdf")
http.HandleFunc("/", IndexHandler)
http.HandleFunc("/post", PostHandler)
serveSingle("/js/getData.js", "./js/getData.js")
http.ListenAndServe(":8888", nil)
}
func serveSingle(pattern string, filename string) {
http.HandleFunc(pattern, func(w http.ResponseWriter, r *http.Request) {
http.ServeFile(w, r, filename)
})
}
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")
}
索引.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="button" name="button" id="button" value="Send" onclick="loadXMLDoc()"/>
</form>
<div id="fromserver">
</div>
</body>
</html>
- 1 回答
- 0 关注
- 169 浏览
添加回答
举报
0/150
提交
取消