xhr.open（）函数中的URL参数做什么？
我正在编写一些服务器软件，并且已经使用非常简单的HTML文件对其进行了测试。当我打开一个新的XMLHttpRequest POST请求时，URL参数似乎没有什么区别。谁能告诉我？如果有帮助，请参见以下代码：
浏览器HTML文件：
<!DOCTYPE html>
<html>
<body>
<title>This is a title!</title>
<p id="paragraph">
Hello World!
</p>
<script>
setTimeout(() => {
var http = new XMLHttpRequest();
var jsonToSend = {
"name": "Steve Smith",
"age": 25,
"isMale": true
};
http.open("POST", "", true);
http.setRequestHeader("Content-Type", "application/json");
http.send(JSON.stringify(jsonToSend));
}, 3000);
</script>
</body>
</html>
服务器代码（node.js）
const http = require("http");
const fs = require("fs");
const port = 80;
http.createServer((request, response) => {
if (request.method == "GET") {
try {
var newUrl = request.url.substring(1);
if (request.url == "/") {
newUrl = "test.html";
}
response.writeHead(200, "OK", {"Content-Type": "text/html"});
response.write(fs.readFileSync(newUrl).toString());
} catch (error) {
response.writeHead(404, "Not Found", {"Content-Type": "text/html"});
response.write("<h1>404 not found</h1>");
}
response.end();
} else if (request.method == "POST") {
var body = "";
request.on("data", (chunk) => {
body += chunk.toString();
});
request.on("end", () => {
console.log(JSON.parse(body));
response.statusCode = 200;
response.end(body);
});
}
console.log(request.method + ":");
console.log(" URL: " + request.url);
console.log(" Status code: " + response.statusCode);
}).listen(port, () => {
console.log("Listening on port " + port);
});
它设置请求的URL。
这似乎没有什么不同，因为您编写的Web服务器对于POST请求不关注URL。
xhr.open（）函数中的URL参数做什么？
我正在编写一些服务器软件，并且已经使用非常简单的HTML文件对其进行了测试。当我打开一个新的XMLHttpRequest POST请求时，URL参数似乎没有什么区别。谁能告诉我？如果有帮助，请参见以下代码：
浏览器HTML文件：
<!DOCTYPE html>
<html>
<body>
<title>This is a title!</title>
<p id="paragraph">
Hello World!
</p>
<script>
setTimeout(() => {
var http = new XMLHttpRequest();
var jsonToSend = {
"name": "Steve Smith",
"age": 25,
"isMale": true
};
http.open("POST", "", true);
http.setRequestHeader("Content-Type", "application/json");
http.send(JSON.stringify(jsonToSend));
}, 3000);
</script>
</body>
</html>
服务器代码（node.js）
const http = require("http");
const fs = require("fs");
const port = 80;
http.createServer((request, response) => {
if (request.method == "GET") {
try {
var newUrl = request.url.substring(1);
if (request.url == "/") {
newUrl = "test.html";
}
response.writeHead(200, "OK", {"Content-Type": "text/html"});
response.write(fs.readFileSync(newUrl).toString());
} catch (error) {
response.writeHead(404, "Not Found", {"Content-Type": "text/html"});
response.write("<h1>404 not found</h1>");
}
response.end();
} else if (request.method == "POST") {
var body = "";
request.on("data", (chunk) => {
body += chunk.toString();
});
request.on("end", () => {
console.log(JSON.parse(body));
response.statusCode = 200;
response.end(body);
});
}
console.log(request.method + ":");
console.log(" URL: " + request.url);
console.log(" Status code: " + response.statusCode);
}).listen(port, () => {
console.log("Listening on port " + port);
});
它设置请求的URL。
这似乎没有什么不同，因为您编写的Web服务器对于POST请求不关注URL。