使用c++实现,使用Socket API编写一个邮件服务器程序,该程序使用HTTP接收来自浏览器客户端的邮件,并保存在文件中,同时返回相应的http响应
时间: 2023-11-27 20:51:41 浏览: 82
为了实现这个邮件服务器程序,我们需要实现以下步骤:
1. 使用Socket API创建一个TCP服务器,监听HTTP请求端口(默认为80)。
2. 当有HTTP请求到达时,解析请求头,获取请求方法、路径和主机名等信息。
3. 如果请求方法为POST,且路径为邮件发送路径,解析POST请求体,获取邮件内容。
4. 将邮件内容保存在文件中,可以使用C++标准库的ofstream类实现。
5. 发送HTTP响应,响应状态码为200,响应体为一段HTML代码,通知用户邮件已经发送成功。
下面是完整的示例代码:
```c++
#include <iostream>
#include <fstream>
#include <sstream>
#include <cstring>
#include <cstdlib>
#include <cstdio>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
using namespace std;
const int MAX_CONNECTIONS = 10;
const int BUFFER_SIZE = 1024;
const char* RESPONSE_TEMPLATE = "<html><head><title>Mail sent</title></head><body><h1>Mail sent successfully</h1></body></html>";
const char* MAIL_PATH = "/mail";
void error(const char* msg) {
perror(msg);
exit(1);
}
int main(int argc, char* argv[]) {
int sockfd, newsockfd, portno;
socklen_t clilen;
char buffer[BUFFER_SIZE];
struct sockaddr_in serv_addr, cli_addr;
if (argc < 2) {
cerr << "ERROR, no port provided" << endl;
exit(1);
}
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd < 0) {
error("ERROR opening socket");
}
bzero((char*)&serv_addr, sizeof(serv_addr));
portno = atoi(argv[1]);
serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr = INADDR_ANY;
serv_addr.sin_port = htons(portno);
if (bind(sockfd, (struct sockaddr*)&serv_addr, sizeof(serv_addr)) < 0) {
error("ERROR on binding");
}
listen(sockfd, MAX_CONNECTIONS);
while (true) {
clilen = sizeof(cli_addr);
newsockfd = accept(sockfd, (struct sockaddr*)&cli_addr, &clilen);
if (newsockfd < 0) {
error("ERROR on accept");
}
bzero(buffer, BUFFER_SIZE);
read(newsockfd, buffer, BUFFER_SIZE - 1);
stringstream ss(buffer);
string method, path, http_version;
ss >> method >> path >> http_version;
string host_header;
while (true) {
getline(ss, host_header);
if (host_header.find("Host:") == 0) {
break;
}
}
string host = host_header.substr(6);
if (method == "POST" && path == MAIL_PATH) {
// Parse mail content
string mail_content;
while (true) {
bzero(buffer, BUFFER_SIZE);
int n = read(newsockfd, buffer, BUFFER_SIZE - 1);
if (n <= 0) {
break;
}
mail_content += buffer;
}
// Save mail to file
ofstream out("mail.txt", ios::app);
out << "From: " << host << endl;
out << "To: " << "admin@example.com" << endl;
out << "Content:" << endl;
out << mail_content << endl;
out.close();
// Send HTTP response
stringstream response_ss;
response_ss << "HTTP/1.1 200 OK\r\n";
response_ss << "Content-Type: text/html\r\n";
response_ss << "Content-Length: " << strlen(RESPONSE_TEMPLATE) << "\r\n";
response_ss << "\r\n";
response_ss << RESPONSE_TEMPLATE;
string response_str = response_ss.str();
write(newsockfd, response_str.c_str(), response_str.size());
} else {
// Send 404 Not Found
stringstream response_ss;
response_ss << "HTTP/1.1 404 Not Found\r\n";
response_ss << "Content-Type: text/plain\r\n";
response_ss << "Content-Length: 9\r\n";
response_ss << "\r\n";
response_ss << "Not Found";
string response_str = response_ss.str();
write(newsockfd, response_str.c_str(), response_str.size());
}
close(newsockfd);
}
close(sockfd);
return 0;
}
```
这个程序会在本地监听80端口,接收来自浏览器客户端的HTTP请求。如果请求路径为/mail,且请求方法为POST,那么程序会解析POST请求体,将邮件内容保存在mail.txt文件中,并返回一个HTTP响应,通知用户邮件发送成功。
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