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Server.cpp
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Server.cpp
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#include <filesystem>
#include "Server.h"
#include <sys/socket.h>
#include <netinet/in.h>
#include <unistd.h>
#include <cstring>
#include "Request.h"
#include "Response.h"
#include "utils.h" // 此头文件需要后续创建，用于包含parse_request和format_response函数的声明
#include <csignal>
#include <fstream>
#include <sstream>
#include <iostream>
// the reason of this value's existence is that we need to close server_sockfd in handle_sigint
// this is the easiest way to do it; pass value to handle_sigint function is goddamn hard
int global_server_sockfd;
void handle_sigint(int sig) {
// print close ifo
std::cout << "Server is closed" << std::endl;
close(global_server_sockfd);
exit(0);
}
std::string Server::file_dir = "./filesSharing/";
Server::Server(const Config &config) : config(config) {
server_sockfd = create_server(config.port);
chat_room = ChatRoom(config.message_lifetime, config.message_rate_limit);
}
[[noreturn]] void Server::start() {
listen(server_sockfd, 5);
global_server_sockfd = server_sockfd;
signal(SIGINT, handle_sigint);
//print server info
std::cout << "Server is listening on port " << config.port << std::endl;
while (true) {
struct sockaddr_in client_addr{};
socklen_t client_addr_len = sizeof(client_addr);
int client_sockfd = accept(server_sockfd, (struct sockaddr *) &client_addr, &client_addr_len);
handle_request(client_sockfd);
::close(client_sockfd);
}
}
/*
* this code only handle ipv4 connection.
int Server::create_server(int port) {
int sockfd = socket(AF_INET, SOCK_STREAM, 0);
struct sockaddr_in server_addr{};
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(port);
server_addr.sin_addr.s_addr = htonl(INADDR_ANY);
bind(sockfd, (struct sockaddr *) &server_addr, sizeof(server_addr));
return sockfd;
}
*/
int Server::create_server(int port) {
int sockfd = socket(AF_INET6, SOCK_STREAM, 0);
struct sockaddr_in6 server_addr{};
server_addr.sin6_family = AF_INET6;
server_addr.sin6_port = htons(port);
server_addr.sin6_addr = in6addr_any;
// 这行代码允许 IPv4 流量在 IPv6 套接字上使用。
int no = 0;
if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_V6ONLY, (void *) &no, sizeof(no)) == -1) {
perror("setsockopt");
return -1;
}
if (bind(sockfd, (struct sockaddr *) &server_addr, sizeof(server_addr)) == -1) {
perror("bind");
return -1;
}
return sockfd;
}
void Server::handle_request(int client_sockfd) {
char buffer[4096];
memset(buffer, 0, sizeof(buffer));
recv(client_sockfd, buffer, sizeof(buffer) - 1, 0);
Request request = parse_request(std::string(buffer));
//print chat history
//print horizon line
std::cout << "--------chat history begin--------------" << std::endl;
std::cout << "chat history is " << chat_room.get_chat_history() << std::endl;
std::cout << "--------chat history end----------------" << std::endl;
Response response("", 200);
if (request.url == "/chatRoom") {
response = handle_chat_request(request);
// 请求的目录包含/filesSharing
} else if (request.url.find("/filesSharing") == 0) {
response = handle_file_request(request);
} else {
response.status = 404;
}
std::string response_str = format_response(response);
send(client_sockfd, response_str.c_str(), response_str.size(), 0);
std::cout << "----------response end------------------" << std::endl;
}
Response Server::handle_chat_request(const Request &request) {
std::string response_body;
int response_status;
// Assuming that chat_room has a method called add_message
if (chat_room.add_message(request.body)) {
response_body = request.body;
response_status = 200;
} else {
response_body = "Failed to add message";
response_status = 500;
}
response_body +=
R"delimiter(<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>发送HTTP请求</title>
<script>
function sendData() {
var input = document.getElementById("inputText").value;
var url = window.location.href;
var xhr = new XMLHttpRequest();
xhr.open("POST", url, true);
xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
xhr.onreadystatechange = function () {
if (xhr.readyState === 4 && xhr.status === 200) {
// 请求成功后的处理逻辑
console.log(xhr.responseText);
}
};
xhr.send(input);
}
function refreshPage() {
window.location.reload();
}
</script>
</head>
<body>
<pre>
current chat history is:
----------------------------------------
)delimiter"
+ chat_room.get_chat_history()
+ R"delimiter(
</pre>
<input type="text" id="inputText" autofocus>
<button onclick="sendData()">发送</button>
<button onclick="refreshPage()">刷新页面</button>
</body>
</html>)delimiter";
// 可以写的更好, 但是就10分分值, 不值得.
return {response_body, response_status};
}
std::string getFileList(const std::string &directoryPath) {
std::filesystem::path path(directoryPath);
std::string fileList;
if (std::filesystem::exists(path) && std::filesystem::is_directory(path)) {
for (const auto &entry: std::filesystem::directory_iterator(path)) {
fileList += entry.path().filename().string() + "\n";
}
}
return fileList;
}
Response Server::handle_file_request(const Request &request) {
std::string response_body;
int response_status;
response_status = 200;
if (request.method == "GET") {
if (request.url == "/filesSharing") {
response_body = getFileList("./filesSharing");
response_body =
R"delimiter(<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>文件上传示例</title>
</head>
<body>
<h1>文件上传示例; 需要花里胡哨的web也可以做.</h1>
<input type="file" id="fileInput">
<button id="uploadButton" onclick="upload()">上传文件</button>
<pre>
current files list is:
----------------------------------------
)delimiter"
+ response_body
+
R"delimiter(
</pre>
<script>
function upload() {
const fileInput = document.getElementById('fileInput');
const file = fileInput.files[0];
if (!file) {
alert('请选择要上传的文件！');
return;
}
// 禁用按钮
const uploadButton = document.getElementById('uploadButton');
uploadButton.disabled = true;
// 构造请求对象
const xhr = new XMLHttpRequest();
xhr.open('POST', '/filesSharing');
xhr.setRequestHeader('Content-Type', file.type); // 设置请求头，发送文件类型
xhr.onreadystatechange = function() {
if (xhr.readyState === 4) {
// 上传完成，启用按钮
uploadButton.disabled = false;
alert('文件上传成功！');
window.location.reload();
}
};
// 发送请求
xhr.setRequestHeader('Content-Disposition', 'filename=' + file.name);
xhr.send(file);
// 提示用户等待上传完成
alert('正在上传文件，请勿操作！');
}
</script>
</body>
</html>)delimiter";
return {response_body, response_status};
} else {
std::string content_type = "Content-Type: octet-stream\r\n";
std::string file_path = request.url;
std::ofstream file;
file.open("." + request.url, std::ios::in | std::ios::binary);
std::stringstream strstream;
strstream << file.rdbuf();
response_body = strstream.str();
return {response_body, content_type, response_status};
}
} else if (request.method == "POST") {
if (request.body.empty()) {
return {response_body, response_status};
}
auto pos = request.headers.find("Content-Length: ") + strlen("Content-Length: ");
auto content_length = request.headers.substr(pos, request.body.find("\r\n", pos) - pos);
// print content_length
std::cout << "----------------------------------------" << std::endl;
std::cout << "content_length: " << content_length << std::endl;
std::cout << "----------------------------------------" << std::endl;
// find string "filename=" in request.body from pos.
pos = request.headers.find("filename=") + 9;
std::string file_name = request.headers.substr(pos, request.headers.find("\r\n", pos) - pos);
//print file_name
std::cout << "----------------------------------------" << std::endl;
std::cout << "file_name: " << file_name << std::endl;
std::cout << "----------------------------------------" << std::endl;
std::ofstream OsWrite(file_dir + file_name, std::ofstream::trunc);
// std::cout << "am i writing?: "
// "\n file_dir"
// + file_dir + file_name
// << request.body;
OsWrite << request.body;
OsWrite << std::endl;
return {response_body, response_status};
}
return {response_body, response_status};
}
int Server::get_server_sockfd() const {
return server_sockfd;
}