英文:
Simple Java HTTP Server application that responds in JSONP
问题
以下是翻译好的内容：
我想创建一个非常简单的HTTP服务器，使用Java并进行JSONP响应。
以下是代码：
public static void main(String[] args) throws Exception {
HttpServer server = HttpServer.create(new InetSocketAddress(8500), 0);
HttpContext context = server.createContext("/test");
context.setHandler(Sample::handleRequest);
server.start();
System.out.println("服务器已启动，端口号：8500");
}
private static void handleRequest(HttpExchange exchange) throws IOException {
JSONObject json = new JSONObject("{\"weight\":\"23400\"}");
exchange.getResponseHeaders().add("Access-Control-Allow-Origin", "*");
exchange.getResponseHeaders().add("Access-Control-Allow-Headers", "origin, content-type, accept, authorization");
exchange.getResponseHeaders().add("Access-Control-Allow-Credentials", "true");
exchange.getResponseHeaders().add("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS, HEAD");
exchange.getResponseHeaders().set("Content-Type", "application/json; charset=UTF-8");
exchange.sendResponseHeaders(200, json.toString().getBytes().length);
OutputStream os = exchange.getResponseBody();
os.write(json.toString().getBytes());
os.close();
}
客户端代码：
$(document).ready(function () {
$.ajax({
url: 'http://localhost:8500/test/',
type: "GET",
dataType: "jsonp",
data: { no: 120 },
contentType: 'application/json',
success: function (data) {
$('#txtWeight').val(data);
},
error: function (err) {
console.log(err);
}
});
});
我遇到的问题与HTTP处理程序有关。Chrome返回：
跨源读取阻止（CORB）阻止了带有文本/纯文本 MIME 类型的跨源响应 http://localhost:8500/test/?callback=jQuery34109210173679568667_1603222391566&no=120&_=1603222391567
请您查看一下，告诉我是否有什么问题？
英文:
I want to create a very simple HTTP server Java with JSONP responds.
Here is the code:
public static void main(String[] args) throws Exception {
HttpServer server = HttpServer.create(new InetSocketAddress(8500), 0);
HttpContext context = server.createContext("/test");
context.setHandler(Sample::handleRequest);
server.start();
System.out.println("Server started on port 8500");
}
private static void handleRequest(HttpExchange exchange) throws IOException {
JSONObject json = new JSONObject("{\"weight\":\"23400\"}");
exchange.getResponseHeaders().add("Access-Control-Allow-Origin", "*");
exchange.getResponseHeaders().add("Access-Control-Allow-Headers","origin, content-type, accept, authorization");
exchange.getResponseHeaders().add("Access-Control-Allow-Credentials", "true");
exchange.getResponseHeaders().add("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS, HEAD");
exchange.getResponseHeaders().set("contentType", "application/json; charset=UTF-8");
exchange.sendResponseHeaders(200, json.toString().getBytes().length);
OutputStream os = exchange.getResponseBody();
os.write(json.toString().getBytes());
os.close();
}
and client:
$(document).ready(function () {
$.ajax({
url: 'http://localhost:8500/test/',
type: "GET",
dataType: "jsonp",
data: { no: 120 },
contentType: 'application/json',
success: function (data) {
$('#txtWeight').val(data);
},
error: function (err) {
console.log( err);
}
});
});
The problem that I have is related to the HTTP Handler. The Chrome returns:
Cross-Origin Read Blocking (CORB) blocked cross-origin response http://localhost:8500/test/?callback=jQuery34109210173679568667_1603222391566&no=120&_=1603222391567 with MIME type text/plain
Could you please have a look and tell me if something is wrong?
答案1
得分: 1
你需要将代码中的"*"替换为你在标头中收到的"Origin"。问题与Chrome相关，与Java无关。
private static void handleRequest(final HttpExchange exchange) throws IOException {
final String json = "{\"weight\":\"23400\"}";
final String origin = exchange.getRequestHeaders().getFirst("Origin");
if (origin != null) exchange.getResponseHeaders().add("Access-Control-Allow-Origin", origin);
exchange.getResponseHeaders().add("Access-Control-Allow-Headers", "origin, content-type, accept, authorization");
exchange.getResponseHeaders().add("Access-Control-Allow-Credentials", "true");
exchange.getResponseHeaders().add("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS, HEAD");
exchange.getResponseHeaders().set("Content-Type", "application/json; charset=UTF-8");
exchange.sendResponseHeaders(200, json.getBytes().length);
try (OutputStream os = exchange.getResponseBody()) {
os.write(json.getBytes());
os.flush();
}
exchange.close();
}
英文:
you need to replace "*" with the "Origin" you received in the header.
The problem is Chrome related and not java related.
private static void handleRequest(final HttpExchange exchange) throws IOException {
final String json = "{\"weight\":\"23400\"}";
final String origin = exchange.getRequestHeaders().getFirst("Origin");
if(origin != null) exchange.getResponseHeaders().add("Access-Control-Allow-Origin", origin);
exchange.getResponseHeaders().add("Access-Control-Allow-Headers","origin, content-type, accept, authorization");
exchange.getResponseHeaders().add("Access-Control-Allow-Credentials", "true");
exchange.getResponseHeaders().add("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS, HEAD");
exchange.getResponseHeaders().set("contentType", "application/json; charset=UTF-8");
exchange.sendResponseHeaders(200, json.getBytes().length);
try(OutputStream os = exchange.getResponseBody()) {
os.write(json.getBytes());
os.flush();
}
exchange.close();
}
通过集体智慧和协作来改善编程学习和解决问题的方式。致力于成为全球开发者共同参与的知识库，让每个人都能够通过互相帮助和分享经验来进步。
评论