[英]Unable to read custom http headers in javascript onreadystatechange?
當我試圖讀取自定義 http headers.i 時,我正在為空。
澤西認證資源:-
@Path("/redirect")
public class RedirectDemo {
@POST
@Consumes(MediaType. APPLICATION_JSON )
public Response getRedirect(@Context ServletContext context,UserTO user) {
UriBuilder builder = UriBuilder.fromPath(context.getContextPath());
System. out .println("User name is:"+user.getUserName());
System. out .println("Password is:"+user.getPassword());
builder.path("/main.html");
return Response
.status(Response.Status. SEE_OTHER )
.header(HttpHeaders. AUTHORIZATION ,"Response authorize")
.header("Access-Control-Allow-Origin", "*")
.header("Access-Control-Allow-Methods", "GET, POST,
DELETE, PUT")
.header("Access-Control-Expose-
Headers",HttpHeaders. AUTHORIZATION )
.header(HttpHeaders. LOCATION , builder.build())
.build();
}
}
登錄 – 頁面 :-
<! DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Login</title>
</head>
<body>
<div class="container-test">
<h3>
<strong>iDNS</strong>
</h3>
</div>
<div class="container">
<form class="form-signin" id="loginForm" name="loginForm"
action="/JerseyPageRedirection/redirect/redirect" method="post"
id="login_form">
<div class="errmsg text-center"></div>
<label for="inputEmail">Email address</label> <input
type="email"
id="emailId" class="form-control" name="emailId"<label
type="password"
placeholder="Email address" required autofocus> <br>
for="inputPassword">Password</label> <input
id="password" class="form-control" name="password"
placeholder="Password" required> <br>
<!-- id="login-submit" -->
<button type="button" class="btn btn-lg btn-primary btn-block"
onclick="doLogin()">Sign in</button>
</form>
</div>
<script>
function doLogin() {
var userName = window
.btoa(document.getElementById('emailId').value);
var password = window
.btoa(document.getElementById('password').value);
var formData = JSON.stringify({
userName : userName,
password : password
});
var xhr = new XMLHttpRequest();
xhr.open("POST", "/JerseyPageRedirection/redirect/redirect");
xhr.setRequestHeader("Content-type", "application/json");
xhr.send(formData);
xhr.onreadystatechange = function() {
console.log(xhr.getResponseHeader("Authorization"));//null
window.location.href = xhr.responseURL;//Redirect works
}
}
</script>
</body>
</html>
標題:-
問題 :-
I am unable read Authorization header content.
我只想在 javascript 中讀取標頭值。 提前致謝。
如果有人仍在尋找答案,您需要在響應旁邊設置“Access-Control-Expose-Headers”。 例如:
Access-Control-Expose-Headers: Content-Type,Authorization,X-RateLimit-Limit,X-RateLimit-Remaining,X-RateLimit-Reset
改變你的回調:
xhr.onreadystatechange = function() {
if(xhr.readyState == 4){//if you are looking only for HTTP 200, then add condition xhr.status == 200
console.log(xhr.getResponseHeader("Authorization"));//will get your response header
window.location.href = xhr.responseURL;//Redirect works
}
}
注意: readyState
保存XMLHttpRequest
的狀態。 從 0 到 4 的變化:
0:請求未初始化
1:服務器連接建立
2:收到請求
3:處理請求
4:請求完成,響應准備好
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