Server:
public class Server04 {
private ServerSocket serverSocket ;
public static void main(String[] args) {
Server04 server = new Server04();
server.start();
}
//启动服务
public void start() {
try {
serverSocket = new ServerSocket(8888);
receive();
} catch (IOException e) {
e.printStackTrace();
System.out.println("服务器启动失败....");
}
}
//接受连接处理
public void receive() {
try {
Socket client = serverSocket.accept();
System.out.println("一个客户端建立了连接....");
//获取请求协议
Request request=new Request(client);
//关注了内容
Response response=new Response(client); //创建好了输出流
response.print("<html>"); //通过输出流输出
response.print("<head>");
response.print("<title>");
response.print("服务器响应成功");
response.print("</title>");
response.print("</head>");
response.print("<body>");
response.print("shsxt server终于回来了。。。。"+request.getParameter("uname"));
response.print("</body>");
response.print("</html>");
//关注了状态码
response.pushToBrowser(200);
} catch (IOException e) {
e.printStackTrace();
System.out.println("客户端错误");
}
}
//停止服务
public void stop() {
}
}
Request:
public class Request{
//协议信息
private String requestInfo;
//请求方式
private String method;
//请求url
private String url;
//请求参数
private String queryStr;
private final String CRLF = "\r\n";
private Map<String,List<String>> parameterMap;
public Request(Socket client) throws IOException {
this(client.getInputStream());
}
public Request(InputStream is) {
parameterMap=new HashMap<String,List<String>>();
byte[] datas = new byte[1024*1024];
int len;
try {
len = is.read(datas);
this.requestInfo = new String(datas,0,len);
} catch (IOException e) {
e.printStackTrace();
return ;
}
//分解字符串
parseRequestInfo();
}
private void parseRequestInfo() {
System.out.println("------分解-------");
System.out.println("---1、获取请求方式: 开头到第一个/------");
this.method = this.requestInfo.substring(0, this.requestInfo.indexOf("/")).toLowerCase();
this.method=this.method.trim();
System.out.println("---2、获取请求url: 第一个/ 到 HTTP/------");
System.out.println("---可能包含请求参数? 前面的为url------");
//1)、获取/的位置
int startIdx = this.requestInfo.indexOf("/")+1;
//2)、获取 HTTP/的位置
int endIdx = this.requestInfo.indexOf("HTTP/");
//3)、分割字符串
this.url = this.requestInfo.substring(startIdx, endIdx);
//4)、获取？的位置
int queryIdx =this.url.indexOf("?");
if(queryIdx>=0) {//表示存在请求参数,考虑在第一个位置的情况
String[] urlArray = this.url.split("\\?");
this.url =urlArray[0];
queryStr =urlArray[1];
}
System.out.println(this.url);
System.out.println("---3、获取请求参数:如果Get已经获取,如果是post可能在请求体中------");
if(method.equals("post")) {
String qStr =this.requestInfo.substring(this.requestInfo.lastIndexOf(CRLF)).trim();
System.out.println(qStr+"-->");
if(null==queryStr) {
queryStr =qStr;
}else {
queryStr +="&"+qStr;
}
}
queryStr = null==queryStr?"":queryStr;
System.out.println(method+"-->"+url+"-->"+queryStr);
//转成Map fav=1&fav=2&uname=shsxt&age=18&others=""
convertMap();
}
//处理请求参数为Map
private void convertMap()
{
//分割字符串
String[] keyValues=this.queryStr.split("&");
for(String queryStr:keyValues)
{
//再次分割字符串按=分
String[] kv=queryStr.split("=");
kv=Arrays.copyOf(kv, 2); //拷贝数组kv中的两个元素到kv
//获取key和value
String key=kv[0];
String value=kv[1]==null?null:decode(kv[1],"utf-8");
//存储到Map
if(!parameterMap.containsKey(key))//如果没有，就创建
{
parameterMap.put(key,new ArrayList<String>() );
}
parameterMap.get(key).add(value);
}
}
//通过name获取对应的多个值
public String[] getParameterValues(String key)
{
List<String> values=this.parameterMap.get(key);
if(null==values||values.size()<1)
{
return null;
}
return values.toArray(new String[0]); //将列表转成字符数组
}
//通过name获取对应的一个值
public String getParameter(String key)
{
String[] values= getParameterValues(key);
return values==null?null:values[0];
}
//处理中文
private String decode(String value,String enc)
{
try {
return java.net.URLDecoder.decode(value,enc);//第二个参数为字符集
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return null;
}
public String getMethod() {
return method;
}
public String getUrl() {
return url;
}
public String getQueryStr() {
return queryStr;
}
}
Response:
public class Response {
private BufferedWriter bw;
//正文
private StringBuilder content;
//协议头（状态行与请求头 回车）信息
private StringBuilder headInfo;
private int len; //正文的字节数
private final String BLANK =" ";
private final String CRLF = "\r\n";
private Response() {
content =new StringBuilder();
headInfo=new StringBuilder();
len =0;
}
public Response(Socket client) {
this();
try {
bw=new BufferedWriter(new OutputStreamWriter(client.getOutputStream()));
} catch (IOException e) {
e.printStackTrace();
headInfo = null;
}
}
public Response(OutputStream os) {
this();
bw=new BufferedWriter(new OutputStreamWriter(os));
}
//动态添加内容
public Response print(String info) {
content.append(info);
len+=info.getBytes().length;
return this;
}
public Response println(String info) {
content.append(info).append(CRLF);
len+=(info+CRLF).getBytes().length;
return this;
}
//推送响应信息
public void pushToBrowser(int code) throws IOException {
if(null ==headInfo) {
code = 505;
}
createHeadInfo(code);
bw.append(headInfo);
bw.append(content);
bw.flush();
}
//构建头信息
private void createHeadInfo(int code) {
//1、响应行: HTTP/1.1 200 OK
headInfo.append("HTTP/1.1").append(BLANK);
headInfo.append(code).append(BLANK);
switch(code) {
case 200:
headInfo.append("OK").append(CRLF);
break;
case 404:
headInfo.append("NOT FOUND").append(CRLF);
break;
case 505:
headInfo.append("SERVER ERROR").append(CRLF);
break;
}
//2、响应头(最后一行存在空行):
headInfo.append("Date:").append(new Date()).append(CRLF);
headInfo.append("Server:").append("shsxt Server/0.0.1;charset=GBK").append(CRLF);
headInfo.append("Content-type:text/html").append(CRLF);
headInfo.append("Content-length:").append(len).append(CRLF);
headInfo.append(CRLF);
}
}
