Java 从http服务器响应资源的正确方法
我有一个index.html页面：Java 从http服务器响应资源的正确方法,java,html,css,resources,httpserver,Java,Html,Css,Resources,Httpserver,我有一个index.html页面： <html> <head> <title>My Site</title> <link rel="stylesheet" type="text/css" href="css/example.css" /> </head> <body> <h2>Hello world</h2> <p
<html>
<head>
<title>My Site</title>
<link rel="stylesheet" type="text/css" href="css/example.css" />
</head>
<body>
<h2>Hello world</h2>
<p>Image:</p>
<img src="someimage.jpg" alt="W3Schools.com" width="104" height="142">
</body>
</html>
/assets//assets/someimage.jpgpageAsString.replace（“src=\”，“/assets/”）；href=“CSS/example.CSS”可能我做错了什么，而这种方法不好？我如何才能将index.html返回到客户端，并提供从服务器加载资源的能力？根据您的问题制作了快速单类项目。制作IMG和脚本标记：
package test.server;
import com.sun.net.httpserver.HttpExchange;
import com.sun.net.httpserver.HttpHandler;
import com.sun.net.httpserver.HttpServer;
import java.io.*;
import java.net.InetSocketAddress;
import java.net.URI;
public class MyHandler implements HttpHandler {
public void handle(HttpExchange t) throws IOException, IOException {
InputStream is = t.getRequestBody();
InputStreamReader isReader = new InputStreamReader(is);
BufferedReader reader = new BufferedReader(isReader);
StringBuffer sb = new StringBuffer();
String str;
while((str = reader.readLine())!= null){
sb.append(str);
}
String response = "<html>\n" +
"\n" +
"<head>\n" +
" <title>My Site</title>\n" +
" <link rel=\"stylesheet\" type=\"text/css\" href=\"css/example.css\" />\n" +
"</head>\n" +
"\n" +
"<body>\n" +
" <h2>Hello world</h2>\n" +
" <p>Image:</p>\n" +
" <img src=\"/assets/cat.jpg\" alt=\"W3Schools.com\" width=\"104\" height=\"142\">\n" +
" <script src=\"/assets/alert.js\"></script>\n" +
"</body>\n" +
"\n" +
"</html>";
t.sendResponseHeaders(200, response.length());
OutputStream os = t.getResponseBody();
os.write(response.getBytes());
os.close();
}
public static void main(String[] args) {
InetSocketAddress cd = new InetSocketAddress(8080);
HttpServer server = null;
try {
server = HttpServer.create(cd, 8080);
} catch (IOException e) {
e.printStackTrace();
}
server.createContext("/main", new MyHandler());
server.createContext("/assets/", new HttpHandler() {
@Override
public void handle(HttpExchange httpExchange) throws IOException {
String root = "!!! YOUR SITE ROOT IN FILE SYSTEM !!!";
URI uri = httpExchange.getRequestURI();
File file = new File(root + uri.getPath()).getCanonicalFile();
if (!file.getPath().startsWith(root)) {
// Suspected path traversal attack: reject with 403 error.
String response = "403 (Forbidden)\n";
httpExchange.sendResponseHeaders(403, response.length());
OutputStream os = httpExchange.getResponseBody();
os.write(response.getBytes());
os.close();
} else if (!file.isFile()) {
// Object does not exist or is not a file: reject with 404 error.
String response = "404 (Not Found)\n";
httpExchange.sendResponseHeaders(404, response.length());
OutputStream os = httpExchange.getResponseBody();
os.write(response.getBytes());
os.close();
} else {
// Object exists and is a file: accept with response code 200.
httpExchange.sendResponseHeaders(200, 0);
OutputStream os = httpExchange.getResponseBody();
FileInputStream fs = new FileInputStream(file);
final byte[] buffer = new byte[0x10000];
int count = 0;
while ((count = fs.read(buffer)) >= 0) {
os.write(buffer,0,count);
}
fs.close();
os.close();
}
}
});
server.setExecutor(null); // creates a default executor
server.start();
}
}
PS基于您使用哪种服务器？@Den Doeson
<img src="/assets/someimage.jpg" width="104" height="142">
package test.server;
import com.sun.net.httpserver.HttpExchange;
import com.sun.net.httpserver.HttpHandler;
import com.sun.net.httpserver.HttpServer;
import java.io.*;
import java.net.InetSocketAddress;
import java.net.URI;
public class MyHandler implements HttpHandler {
public void handle(HttpExchange t) throws IOException, IOException {
InputStream is = t.getRequestBody();
InputStreamReader isReader = new InputStreamReader(is);
BufferedReader reader = new BufferedReader(isReader);
StringBuffer sb = new StringBuffer();
String str;
while((str = reader.readLine())!= null){
sb.append(str);
}
String response = "<html>\n" +
"\n" +
"<head>\n" +
" <title>My Site</title>\n" +
" <link rel=\"stylesheet\" type=\"text/css\" href=\"css/example.css\" />\n" +
"</head>\n" +
"\n" +
"<body>\n" +
" <h2>Hello world</h2>\n" +
" <p>Image:</p>\n" +
" <img src=\"/assets/cat.jpg\" alt=\"W3Schools.com\" width=\"104\" height=\"142\">\n" +
" <script src=\"/assets/alert.js\"></script>\n" +
"</body>\n" +
"\n" +
"</html>";
t.sendResponseHeaders(200, response.length());
OutputStream os = t.getResponseBody();
os.write(response.getBytes());
os.close();
}
public static void main(String[] args) {
InetSocketAddress cd = new InetSocketAddress(8080);
HttpServer server = null;
try {
server = HttpServer.create(cd, 8080);
} catch (IOException e) {
e.printStackTrace();
}
server.createContext("/main", new MyHandler());
server.createContext("/assets/", new HttpHandler() {
@Override
public void handle(HttpExchange httpExchange) throws IOException {
String root = "!!! YOUR SITE ROOT IN FILE SYSTEM !!!";
URI uri = httpExchange.getRequestURI();
File file = new File(root + uri.getPath()).getCanonicalFile();
if (!file.getPath().startsWith(root)) {
// Suspected path traversal attack: reject with 403 error.
String response = "403 (Forbidden)\n";
httpExchange.sendResponseHeaders(403, response.length());
OutputStream os = httpExchange.getResponseBody();
os.write(response.getBytes());
os.close();
} else if (!file.isFile()) {
// Object does not exist or is not a file: reject with 404 error.
String response = "404 (Not Found)\n";
httpExchange.sendResponseHeaders(404, response.length());
OutputStream os = httpExchange.getResponseBody();
os.write(response.getBytes());
os.close();
} else {
// Object exists and is a file: accept with response code 200.
httpExchange.sendResponseHeaders(200, 0);
OutputStream os = httpExchange.getResponseBody();
FileInputStream fs = new FileInputStream(file);
final byte[] buffer = new byte[0x10000];
int count = 0;
while ((count = fs.read(buffer)) >= 0) {
os.write(buffer,0,count);
}
fs.close();
os.close();
}
}
});
server.setExecutor(null); // creates a default executor
server.start();
}
}
alert("I'm from inner file!");
console.log("I'm from inner file!");