forked from Deniska728/web-server
-
Notifications
You must be signed in to change notification settings - Fork 0
/
HTTP_protocol.cpp
255 lines (221 loc) · 5.75 KB
/
HTTP_protocol.cpp
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
#include "stdafx.h"
#if ! defined(_WIN32)
#include <sys/socket.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <sys/types.h>
#include <pwd.h>
#else
#pragma comment(lib,"Ws2_32.lib")
#include <winsock2.h>
#include <WS2tcpip.h>
#include <io.h>
#define write _write
#define close _close
#endif
#include <string>
#include <fstream>
#include <sstream>
#include <vector>
using namespace std;
extern string http_root_folder;
string Get_HTML(string filename, int &response_code)
{
string response;
string fullpath = http_root_folder + filename;
ifstream input(fullpath);
if (input.fail())
{
response = "<html><body><h1>Web Page " + filename + " not found!</h1>\r\n";
response_code = 404;
}
else
{
stringstream sstr;
while (input >> sstr.rdbuf());
response = sstr.str();
response_code = 200;
}
return response;
}
void response_on_get_request(int client, string pagename)
{
int response_code;
string html;
printf("GET %s\n", pagename.c_str());
if (pagename == "/")
pagename = "/index.html";
bool binary = true;
string ext = pagename.substr(pagename.find_first_of(".") + 1);
string content_type;
if (ext == "html" || ext == "htm")
{
content_type = "text/html";
binary = false;
}
else if (ext == "gif")
content_type = "image/gif";
else if (ext == "png")
content_type = "image/png";
else if (ext == "jpg")
content_type = "image/jpeg";
else if (ext == "css")
{
content_type = "text/css";
binary = false;
}
else if (ext == "xml")
{
content_type = "application/xml";
binary = false;
}
else if (ext == "ico")
content_type = "image/png";
else
{
content_type = "application/octet-stream";
fprintf(stderr, "Cannot detect content type: %s\n", pagename.c_str());
}
html = Get_HTML(pagename, response_code);
std::stringstream len;
len << html.length();
string http_response = "HTTP/1.1 " + std::to_string(response_code) + " OK\r\n";
http_response += "Date: Wen 27 Nov 2018 17:30:15 GMT\r\n";
http_response += "Server: MyCoolServer/0.0.2\r\n";
http_response += "Content-Length: " + len.str() + "\r\n";
http_response += "Content-Type: " + content_type + "\r\n";
http_response += "Connection: Closed\r\n";
http_response += "\r\n";
http_response += html;
send(client, http_response.c_str(), http_response.length(), 0);
}
vector <string> split(const string &s, char delimiter)
{
vector<string> tokens;
string token;
istringstream tokenStream(s);
while (getline(tokenStream, token, delimiter)) {
tokens.push_back(token);
}
return tokens;
}
// Some of HTTP session options
string host_option;
int port_option;
bool keep_alive;
string cache_control_option;
string user_agent;
string accept_encoding;
string accept_languages;
string referer;
string upgrade_insecure_requests;
vector<string> accept_format_list;
void parse_accepting_formats(string formats)
{
accept_format_list.clear();
vector <string> option = split(formats, ';');
for (vector <string>::iterator item = option.begin(); item != option.end(); item++)
{
vector <string> subitems = split(*item, ',');
for (vector <string>::iterator subitem = subitems.begin(); subitem != subitems.end(); subitem++)
{
bool is_format = subitem->find("/") != std::string::npos;
if (is_format)
{
accept_format_list.push_back(*subitem);
}
}
}
}
void parse_request_options(vector <string> lines)
{
for (int i = 1; i < lines.size(); i++)
{
vector <string> option = split(lines[i], ':');
if (option.size() < 2)
break;
string value = option[1];
if (value[0] == ' ')
value = value.erase(0, 1);
if (option[0] == "\nHost")
{
host_option = value;
if (option.size() > 2)
port_option = std::atoi(option[2].c_str());
// printf("Host: '%s:%d'\n", host_option.c_str(), port_option);
}
else if (option[0] == "\nConnection")
{
if (value == "keep-alive")
{
printf("Keep alive connection option\n");
keep_alive = true;
}
else
printf("TODO: parse connection type: '%s'\n", value.c_str());
}
else if (option[0] == "\nUser-Agent")
user_agent = value;
else if (option[0] == "\nAccept")
parse_accepting_formats(value);
else if (option[0] == "\nAccept-Encoding")
accept_encoding = value;
else if (option[0] == "\nAccept-Language")
accept_languages = value;
else if (option[0] == "\nCache-Control")
cache_control_option = value;
else if (option[0] == "\nUpgrade-Insecure-Requests")
upgrade_insecure_requests = value;
else if (option[0] == "\nReferer")
{
referer = value;
printf("Referer: '%s'\n", value.c_str());
}
else if (option[0] == "\nPragma")
printf("Pragma: '%s'\n", value.c_str());
else
printf("Unknown option - %s: %s\n", option[0].c_str(), value.c_str());
}
puts("\n");
}
void serve(int client)
{
char http_request[4096];
int read_size;
do
{
keep_alive = false;
read_size = recv(client, http_request, sizeof(http_request), 0);
if (read_size < 0)
{
perror("Unable read socket");
exit(-1);
}
http_request[read_size] = 0;
vector<string> lines = split(http_request, '\r');
parse_request_options(lines);
if (lines.size() > 0)
{
vector <string> request_header = split(lines[0], ' ');
string request_type = request_header[0];
if (request_type == "GET")
{
response_on_get_request(client, request_header[1]);
}
else
{
printf("Request '%s' not supported\n", request_type.c_str());
}
}
else
{
fprintf(stdout, "Got empty request\n");
}
} while (false); // keep_alive);
#if ! defined(_WIN32)
exit(0);
#else
closesocket(client);
#pragma comment(user, "TODO: multithread")
#endif
}