pure-cpp-web-server/web_server.cpp at main · zulqarDOTnet/pure-cpp-web-server · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
// @Author Zulqarnain Z.
// @HireMe https://www.fiverr.com/zulqar

#include <fstream>
#include <iostream>

#include <boost/asio.hpp>
#include <boost/bind/bind.hpp>
#include <boost/thread.hpp>

#include "src/config.hpp"
#include "src/header.hpp"
#include "src/encode.hpp"
#include "src/protect.hpp"
#include "src/mime.hpp"

namespace fs = std::filesystem;
namespace ba = boost::asio;
using ba::ip::tcp;

class Session : public std::enable_shared_from_this<Session>
{
public:
    Session(ba::io_context &io_context, ba::strand<ba::io_context::executor_type> &strand, tcp::socket socket, const std::unordered_map<std::string, std::string> &domain_doc_roots, const std::string &doc_root)
        : strand_(strand),
          socket_(std::move(socket)),
          domain_doc_roots_(domain_doc_roots),
          doc_root_(doc_root)
    {
        //
    }

    void start()
    {
        do_read();
    }

private:
    void send_file_content(std::string content)
    {
        // Create a shared pointer to the content string
        auto content_ptr = std::make_shared<std::string>(std::move(content));
        auto self(shared_from_this());

        // Start asynchronous operation to write the content to the socket
        ba::async_write(socket_, ba::buffer(*content_ptr), boost::asio::bind_executor(strand_, [this, self, content_ptr](boost::system::error_code ec, std::size_t)
                                                                                      {
        if (!ec) {
            // The content has been successfully sent
            //std::cout << "Content has been sent successfully." << std::endl;
        } else {
            std::ostringstream response;
            response << "HTTP/1.1 500 Internal Server Error\r\n";
            response << "Content-Type: text/html\r\n\r\n";
            response << "<html><body><h1>500 Internal Server Error</h1></body></html>";
            ba::async_write(socket_, ba::buffer(response.str()), boost::asio::bind_executor(strand_, [this, self, content_ptr](boost::system::error_code ec, std::size_t) {}));
            //std::cerr << "Error sending content: " << ec.message() << std::endl;
        } }));
    }

    void serve_file(const std::string &path, const std::string &encoding)
    {
        std::string sanitized_path = sanitize_path(path);
        std::string full_path = doc_root_.back() == '/' ? doc_root_ : doc_root_ + "/";
        full_path += (sanitized_path.find("/") == 0) ? sanitized_path.substr(1) : sanitized_path;

        // Use filesystem to check if the path is a directory
        if (fs::is_directory(full_path))
        {
            full_path += "/index.html";
        }

        // Debugging output
        // std::cout << "Attempting to serve file: " << full_path << std::endl;

        std::ifstream file(full_path, std::ios::binary);
        if (!file)
        {
            // File not found, respond with 404
            std::ostringstream response;
            response << "HTTP/1.1 404 Not Found\r\n";
            response << "Server: zulqarDOTnet_C++/1.2.0 (Unix)\r\n";
            response << "Content-Type: text/html\r\n\r\n";
            response << "<html><body><h1>404 Not Found</h1></body></html>";
            ba::async_write(socket_, ba::buffer(response.str()), boost::asio::bind_executor(strand_, [self = shared_from_this()](boost::system::error_code ec, std::size_t)
                                                                                            {
            if (ec) {
                std::cerr << "Error sending response: " << ec.message() << std::endl;
            } }));
        }
        else
        {
            // Determine the MIME type
            std::string mime_type = get_mime_type(full_path);

            // Define cache expiry times
            const std::string cache_control_html = "public, max-age=14400, immutable";        // 4 hours for HTML
            const std::string cache_control_image = "public, max-age=86400, must-revalidate"; // 24 hours for images

            // Select the cache control header based on the MIME type
            std::string cache_control;
            if (mime_type == "text/html" || mime_type == "application/xhtml+xml")
            {
                cache_control = cache_control_html;
            }
            else if (mime_type == "image/png" || mime_type == "image/jpeg" || mime_type == "image/gif" || mime_type == "image/avif" || mime_type == "image/webp")
            {
                cache_control = cache_control_image;
            }
            else
            {
                // Default or other MIME types
                cache_control = "public, max-age=3600, must-revalidate"; // 1 hour for others
            }

            // Get the file size
            file.seekg(0, std::ios::end);
            std::size_t file_size = file.tellg();
            file.seekg(0, std::ios::beg);

            // Read the entire file into a string
            std::string file_content;
            file_content.resize(file_size);
            file.read(&file_content[0], file_size);

            // Check the Accept-Encoding header and compress accordingly
            // std::string encoding = "";
            // std::string encoding = "zstd";
            // std::string encoding = "gzip";
            // std::string encoding = "deflate";
            // std::string encoding = "br";
            std::string compressed_content;

            if (encoding.find("zstd") != std::string::npos)
            {
                compressed_content = compress_zstd(file_content);
                mime_type += "\r\nContent-Encoding: zstd";
            }
            else if (encoding.find("gzip") != std::string::npos)
            {
                compressed_content = compress_gzip(file_content);
                mime_type += "\r\nContent-Encoding: gzip";
            }
            else if (encoding.find("deflate") != std::string::npos)
            {
                compressed_content = compress_deflate(file_content);
                mime_type += "\r\nContent-Encoding: deflate";
            }
            else if (encoding.find("br") != std::string::npos)
            {
                compressed_content = compress_brotli(file_content);
                mime_type += "\r\nContent-Encoding: br";
            }
            else
            {
                compressed_content = file_content; // No compression
            }

            // Update the file size to the size of the compressed content
            file_size = compressed_content.size();

            // Build the response headers
            std::ostringstream response;
            response << "HTTP/1.1 200 OK\r\n";
            response << "Server: zulqarDOTnet_C++/1.2.0 (Unix)\r\n";
            response << "Content-Type: " << mime_type << "\r\n";
            response << "Cache-Control: " << cache_control << "\r\n";
            response << "Content-Length: " << file_size << "\r\n\r\n";

            // Send the headers
            ba::async_write(socket_, ba::buffer(response.str()), boost::asio::bind_executor(strand_, [this, self = shared_from_this(), compressed_content](boost::system::error_code ec, std::size_t) mutable
                                                                                            {
            if (!ec) {
                // If headers were successfully sent, send the file content
                send_file_content(std::move(compressed_content));
                // Clear the compressed_content to free memory
                compressed_content.clear();
            } else {
                std::cerr << "Error sending headers: " << ec.message() << std::endl;
            } }));
        }
    }

    // ... [Other methods like handle_read, serve_file, etc.] ...
    void handle_read(const boost::system::error_code &error, std::size_t bytes_transferred)
    {
        if (!error)
        {
            // Convert the streambuf data to a std::istream object
            std::istream request_stream(&request_buf_);
            std::string request_line;
            std::getline(request_stream, request_line);

            // Parse the request line
            std::istringstream request_ss(request_line);
            std::string method, path, version;
            request_ss >> method >> path >> version;

            // Read the rest of the request headers
            std::string headers;
            std::string header_line;
            while (std::getline(request_stream, header_line) && header_line != "\r")
            {
                headers += header_line + "\n";
            }

            // Parse the Host header to determine the domain
            std::string host = get_host(headers);
            doc_root_ = domain_doc_roots_[host]; // Update the doc_root_ based on the domain

            // Check the HTTP method
            if (method == "GET")
            {
                // Get the accepted encodings from the request headers
                std::string encoding = get_accepted_encoding(headers);

                // Sanitize the path and serve the file
                serve_file(path, encoding); // Pass the encoding to the serve_file method
            }
            else
            {
                // Handle other HTTP methods (e.g., POST, PUT)
                std::ostringstream response;
                response << "HTTP/1.1 405 Method Not Allowed\r\n";
                response << "Content-Type: text/html\r\n\r\n";
                response << "<html><body><h1>405 Method Not Allowed</h1></body></html>";
                ba::write(socket_, ba::buffer(response.str()));
            }
        }
        else
        {
            std::ostringstream response;
            response << "HTTP/1.1 500 Internal Server Error\r\n";
            response << "Content-Type: text/html\r\n\r\n";
            response << "<html><body><h1>500 Internal Server Error</h1></body></html>";
            ba::write(socket_, ba::buffer(response.str()));
            // std::cerr << "Error in handle_read: " << error.message() << std::endl;
        }
    }

    void do_read()
    {
        auto self(shared_from_this());
        ba::async_read_until(socket_, request_buf_, "\r\n\r\n",
                             boost::asio::bind_executor(strand_,
                                                        boost::bind(&Session::handle_read, self,
                                                                    boost::asio::placeholders::error,
                                                                    boost::asio::placeholders::bytes_transferred)));
    }

    // Declare other member variables and methods as needed
    ba::strand<ba::io_context::executor_type> &strand_;
    tcp::socket socket_;
    ba::streambuf request_buf_;
    std::unordered_map<std::string, std::string> domain_doc_roots_;
    std::string doc_root_;
};

class WebServer
{
public:
    WebServer(ba::io_context &io_context, const std::unordered_map<std::string, std::string> &domain_doc_roots, short port,
              const std::string &ipv4_address,
              const std::string &ipv6_address)
        : io_context_(io_context),
          strand_(io_context.get_executor()),
          domain_doc_roots_(domain_doc_roots),
          acceptor_v4_(io_context_, ba::ip::tcp::endpoint(ba::ip::address::from_string(ipv4_address), port)),
          acceptor_v6_(io_context_, ba::ip::tcp::endpoint(ba::ip::address::from_string(ipv6_address), port))
    {
        acceptor_v4_.set_option(ba::ip::tcp::acceptor::reuse_address(true));
        acceptor_v6_.set_option(ba::ip::tcp::acceptor::reuse_address(true));
        start_accept();
    }

    void run()
    {
        // Run the io_context object to perform asynchronous operations
        io_context_.run();
    }

private:
    void start_accept()
    {
        // Create a new socket for the incoming connection
        auto socket_v4 = std::make_shared<ba::ip::tcp::socket>(io_context_);
        auto socket_v6 = std::make_shared<ba::ip::tcp::socket>(io_context_);

        // Start an asynchronous accept operation for IPv4
        acceptor_v4_.async_accept(*socket_v4,
                                  boost::asio::bind_executor(strand_,
                                                             boost::bind(&WebServer::handle_accept, this, socket_v4,
                                                                         boost::asio::placeholders::error)));

        // Start an asynchronous accept operation for IPv6
        acceptor_v6_.async_accept(*socket_v6,
                                  boost::asio::bind_executor(strand_,
                                                             boost::bind(&WebServer::handle_accept, this, socket_v6,
                                                                         boost::asio::placeholders::error)));
    }

    void handle_accept(std::shared_ptr<tcp::socket> socket, const boost::system::error_code &error)
    {
        if (!error)
        {
            // Start the session on the strand
            std::make_shared<Session>(io_context_, strand_, std::move(*socket), domain_doc_roots_, "./domains")->start();
        }
        start_accept();
    }

    // Declare other member variables and methods as needed
    ba::io_context &io_context_;
    ba::strand<ba::io_context::executor_type> strand_;
    tcp::acceptor acceptor_v4_;
    tcp::acceptor acceptor_v6_;
    std::unordered_map<std::string, std::string> domain_doc_roots_;
};

int main(int argc, char *argv[])
{
    try
    {

        if (argc != 3)
        {
            std::cerr << "Usage: " << argv[0] << " <ipv4_address> <ipv6_address>\n";
            return 1;
        }

        std::string ipv4_address = argv[1];
        std::string ipv6_address = argv[2];

        // Load the configuration
        auto [port, domain_doc_roots] = load_config("config.json");
        // std::cout << "Port: " << port << std::endl;
        for (const auto &[domain, doc_root] : domain_doc_roots)
        {
            // std::cout << "Domain: " << domain << " -> Document Root: " << doc_root << std::endl;
        }

        // Start the web server
        ba::io_context io_context;
        ba::strand<ba::io_context::executor_type> strand_(io_context.get_executor());
        WebServer server(io_context, domain_doc_roots, port, ipv4_address, ipv6_address);
        server.run();
    }
    catch (const std::exception &e)
    {
        std::cerr << "Error: " << e.what() << std::endl;
        return 1;
    }

    return 0;
}