simple-http-server-beast-boost/main.cpp at main · GyroPower/simple-http-server-beast-boost · 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
#include <boost/beast/core.hpp>
#include <boost/beast/http.hpp>
#include <boost/asio.hpp>
#include <iostream>
#include <fstream>
#include <sstream>


namespace beast = boost::beast;
namespace http = beast::http;
namespace net = boost::asio;
using tcp = net::ip::tcp;


std::string read_file(const std::string& filePath)
{
    std::ifstream file(filePath);

    if(!file.is_open())
    {
        throw std::runtime_error("Could not open file: " + filePath);
    }

    std::stringstream buffer;
    buffer << file.rdbuf();
    return buffer.str();
}

void set_responseHtml(http::response<http::string_body>& res,
    const std::string& file_nameLoc)
{
    std::string html_context = read_file("index.html");

    res.result(http::status::ok);
    res.set(http::field::server, "Beast");
    res.set(http::field::content_type, "text/html");
    res.body() = html_context;


}

void main_view(http::request<http::string_body>& req,
    http::response<http::string_body>& res)
{
    set_responseHtml(res, "index.htlm");
    res.version(req.version());
    res.keep_alive(req.keep_alive());
    res.prepare_payload();
}

void get_request(http::request<http::string_body>& req,
    http::response<http::string_body>& res)
{
    res.result(http::status::ok);
    res.set(http::field::content_type, "application/json");
    res.body() = R"({"message": "This is a GET request"})";
    res.version(req.version());
    res.keep_alive(req.keep_alive());
    res.prepare_payload();
}

void post_request(http::request<http::string_body>& req,
    http::response<http::string_body>& res)
{
    res.result(http::status::ok);
    res.set(http::field::content_type, "application/json");
    res.body() = R"({"message": "This is a POST request"})";
    res.version(req.version());
    res.keep_alive(req.keep_alive());
    res.prepare_payload();
}

void handle_request(beast::string_view doc_root,
    http::request<http::string_body> req,
    http::response<http::string_body>& res)
{

    if(req.method() == http::verb::get && req.target() == "/")
    {
        main_view(req, res);
    }
    else if(req.method() == http::verb::get && req.target() == "/api")
        get_request(req, res);
    else if(req.method() == http::verb::post && req.target() == "/api")
        post_request(req, res);


}

void do_session(tcp::socket& socket)
{
    bool close = false;
    boost::system::error_code ec;
    try{
        beast::flat_buffer buffer;
        http::request<http::string_body> req;

        http::read(socket, buffer, req, ec);


        if(ec == http::error::end_of_stream)
            close = true;
        else if(ec)
        {
            std::cerr<<"Read Error: " << ec.message() << "\n";
            return;
        }


        http::response<http::string_body> res;
        handle_request(".",req,res);

        http::write(socket, res, ec);

        if(ec)
        {
            std::cerr << "Write Error: " << ec.message() << "\n";
            return;
        }

        if(res.need_eof())
            close = true;

        if(close)
        {
            boost::system::error_code ec_close;
            socket.shutdown(tcp::socket::shutdown_send, ec_close);
        }
    }
    catch (std::exception& e)
    {
        std::cerr << "Exception: " << e.what() << "\n";
    }
}


int main()
{
    try{
        net::io_context io_context;
        tcp::acceptor acceptor(io_context, {tcp::v4(), 5050});

        for(;;)
        {
            tcp::socket socket(io_context);
            acceptor.accept(socket);
            do_session(socket);
        }
    }
    catch(std::exception& e){
        std::cerr << "Error: " << e.what() << "\n";
    }

    return 0;
}