1 #include "client_https.hpp"
2 #include "server_https.hpp"
3 #include <future>
4
5 // Added for the json-example
6 #define BOOST_SPIRIT_THREADSAFE
7 #include <boost/property_tree/json_parser.hpp>
8 #include <boost/property_tree/ptree.hpp>
9
10 // Added for the default_resource example
11 #include "crypto.hpp"
12 #include <algorithm>
13 #include <boost/filesystem.hpp>
14 #include <fstream>
15 #include <vector>
16
17 using namespace std;
18 // Added for the json-example:
19 using namespace boost::property_tree;
20
21 using HttpsServer = SimpleWeb::Server<SimpleWeb::HTTPS>;
22 using HttpsClient = SimpleWeb::Client<SimpleWeb::HTTPS>;
23
main()24 int main() {
25 // HTTPS-server at port 8080 using 1 thread
26 // Unless you do more heavy non-threaded processing in the resources,
27 // 1 thread is usually faster than several threads
28 HttpsServer server("server.crt", "server.key");
29 server.config.port = 8080;
30
31 // Add resources using path-regex and method-string, and an anonymous function
32 // POST-example for the path /string, responds the posted string
33 server.resource["^/string$"]["POST"] = [](shared_ptr<HttpsServer::Response> response, shared_ptr<HttpsServer::Request> request) {
34 // Retrieve string:
35 auto content = request->content.string();
36 // request->content.string() is a convenience function for:
37 // stringstream ss;
38 // ss << request->content.rdbuf();
39 // auto content=ss.str();
40
41 *response << "HTTP/1.1 200 OK\r\nContent-Length: " << content.length() << "\r\n\r\n"
42 << content;
43
44
45 // Alternatively, use one of the convenience functions, for instance:
46 // response->write(content);
47 };
48
49 // POST-example for the path /json, responds firstName+" "+lastName from the posted json
50 // Responds with an appropriate error message if the posted json is not valid, or if firstName or lastName is missing
51 // Example posted json:
52 // {
53 // "firstName": "John",
54 // "lastName": "Smith",
55 // "age": 25
56 // }
57 server.resource["^/json$"]["POST"] = [](shared_ptr<HttpsServer::Response> response, shared_ptr<HttpsServer::Request> request) {
58 try {
59 ptree pt;
60 read_json(request->content, pt);
61
62 auto name = pt.get<string>("firstName") + " " + pt.get<string>("lastName");
63
64 *response << "HTTP/1.1 200 OK\r\n"
65 << "Content-Length: " << name.length() << "\r\n\r\n"
66 << name;
67 }
68 catch(const exception &e) {
69 *response << "HTTP/1.1 400 Bad Request\r\nContent-Length: " << strlen(e.what()) << "\r\n\r\n"
70 << e.what();
71 }
72
73
74 // Alternatively, using a convenience function:
75 // try {
76 // ptree pt;
77 // read_json(request->content, pt);
78
79 // auto name=pt.get<string>("firstName")+" "+pt.get<string>("lastName");
80 // response->write(name);
81 // }
82 // catch(const exception &e) {
83 // response->write(SimpleWeb::StatusCode::client_error_bad_request, e.what());
84 // }
85 };
86
87 // GET-example for the path /info
88 // Responds with request-information
89 server.resource["^/info$"]["GET"] = [](shared_ptr<HttpsServer::Response> response, shared_ptr<HttpsServer::Request> request) {
90 stringstream stream;
91 stream << "<h1>Request from " << request->remote_endpoint().address().to_string() << ":" << request->remote_endpoint().port() << "</h1>";
92
93 stream << request->method << " " << request->path << " HTTP/" << request->http_version;
94
95 stream << "<h2>Query Fields</h2>";
96 auto query_fields = request->parse_query_string();
97 for(auto &field : query_fields)
98 stream << field.first << ": " << field.second << "<br>";
99
100 stream << "<h2>Header Fields</h2>";
101 for(auto &field : request->header)
102 stream << field.first << ": " << field.second << "<br>";
103
104 response->write(stream);
105 };
106
107 // GET-example for the path /match/[number], responds with the matched string in path (number)
108 // For instance a request GET /match/123 will receive: 123
109 server.resource["^/match/([0-9]+)$"]["GET"] = [](shared_ptr<HttpsServer::Response> response, shared_ptr<HttpsServer::Request> request) {
110 response->write(request->path_match[1].str());
111 };
112
113 // GET-example simulating heavy work in a separate thread
114 server.resource["^/work$"]["GET"] = [](shared_ptr<HttpsServer::Response> response, shared_ptr<HttpsServer::Request> /*request*/) {
115 thread work_thread([response] {
116 this_thread::sleep_for(chrono::seconds(5));
117 response->write("Work done");
118 });
119 work_thread.detach();
120 };
121
122 // Default GET-example. If no other matches, this anonymous function will be called.
123 // Will respond with content in the web/-directory, and its subdirectories.
124 // Default file: index.html
125 // Can for instance be used to retrieve an HTML 5 client that uses REST-resources on this server
126 server.default_resource["GET"] = [](shared_ptr<HttpsServer::Response> response, shared_ptr<HttpsServer::Request> request) {
127 try {
128 auto web_root_path = boost::filesystem::canonical("web");
129 auto path = boost::filesystem::canonical(web_root_path / request->path);
130 // Check if path is within web_root_path
131 if(distance(web_root_path.begin(), web_root_path.end()) > distance(path.begin(), path.end()) ||
132 !equal(web_root_path.begin(), web_root_path.end(), path.begin()))
133 throw invalid_argument("path must be within root path");
134 if(boost::filesystem::is_directory(path))
135 path /= "index.html";
136
137 SimpleWeb::CaseInsensitiveMultimap header;
138
139 // Uncomment the following line to enable Cache-Control
140 // header.emplace("Cache-Control", "max-age=86400");
141
142 #ifdef HAVE_OPENSSL
143 // Uncomment the following lines to enable ETag
144 // {
145 // ifstream ifs(path.string(), ifstream::in | ios::binary);
146 // if(ifs) {
147 // auto hash = SimpleWeb::Crypto::to_hex_string(SimpleWeb::Crypto::md5(ifs));
148 // header.emplace("ETag", "\"" + hash + "\"");
149 // auto it = request->header.find("If-None-Match");
150 // if(it != request->header.end()) {
151 // if(!it->second.empty() && it->second.compare(1, hash.size(), hash) == 0) {
152 // response->write(SimpleWeb::StatusCode::redirection_not_modified, header);
153 // return;
154 // }
155 // }
156 // }
157 // else
158 // throw invalid_argument("could not read file");
159 // }
160 #endif
161
162 auto ifs = make_shared<ifstream>();
163 ifs->open(path.string(), ifstream::in | ios::binary | ios::ate);
164
165 if(*ifs) {
166 auto length = ifs->tellg();
167 ifs->seekg(0, ios::beg);
168
169 header.emplace("Content-Length", to_string(length));
170 response->write(header);
171
172 // Trick to define a recursive function within this scope (for example purposes)
173 class FileServer {
174 public:
175 static void read_and_send(const shared_ptr<HttpsServer::Response> &response, const shared_ptr<ifstream> &ifs) {
176 // Read and send 128 KB at a time
177 static vector<char> buffer(131072); // Safe when server is running on one thread
178 streamsize read_length;
179 if((read_length = ifs->read(&buffer[0], static_cast<streamsize>(buffer.size())).gcount()) > 0) {
180 response->write(&buffer[0], read_length);
181 if(read_length == static_cast<streamsize>(buffer.size())) {
182 response->send([response, ifs](const SimpleWeb::error_code &ec) {
183 if(!ec)
184 read_and_send(response, ifs);
185 else
186 cerr << "Connection interrupted" << endl;
187 });
188 }
189 }
190 }
191 };
192 FileServer::read_and_send(response, ifs);
193 }
194 else
195 throw invalid_argument("could not read file");
196 }
197 catch(const exception &e) {
198 response->write(SimpleWeb::StatusCode::client_error_bad_request, "Could not open path " + request->path + ": " + e.what());
199 }
200 };
201
202 server.on_error = [](shared_ptr<HttpsServer::Request> /*request*/, const SimpleWeb::error_code & /*ec*/) {
203 // Handle errors here
204 // Note that connection timeouts will also call this handle with ec set to SimpleWeb::errc::operation_canceled
205 };
206
207 // Start server and receive assigned port when server is listening for requests
208 promise<unsigned short> server_port;
209 thread server_thread([&server, &server_port]() {
210 // Start server
211 server.start([&server_port](unsigned short port) {
212 server_port.set_value(port);
213 });
214 });
215 cout << "Server listening on port " << server_port.get_future().get() << endl
216 << endl;
217
218 // Client examples
219 string json_string = "{\"firstName\": \"John\",\"lastName\": \"Smith\",\"age\": 25}";
220
221 // Synchronous request examples
222 {
223 HttpsClient client("localhost:8080", false);
224 try {
225 cout << "Example GET request to https://localhost:8080/match/123" << endl;
226 auto r1 = client.request("GET", "/match/123");
227 cout << "Response content: " << r1->content.rdbuf() << endl // Alternatively, use the convenience function r1->content.string()
228 << endl;
229
230 cout << "Example POST request to https://localhost:8080/string" << endl;
231 auto r2 = client.request("POST", "/string", json_string);
232 cout << "Response content: " << r2->content.rdbuf() << endl
233 << endl;
234 }
235 catch(const SimpleWeb::system_error &e) {
236 cerr << "Client request error: " << e.what() << endl;
237 }
238 }
239
240 // Asynchronous request example
241 {
242 HttpsClient client("localhost:8080", false);
243 cout << "Example POST request to https://localhost:8080/json" << endl;
244 client.request("POST", "/json", json_string, [](shared_ptr<HttpsClient::Response> response, const SimpleWeb::error_code &ec) {
245 if(!ec)
246 cout << "Response content: " << response->content.rdbuf() << endl;
247 });
248 client.io_service->run();
249 }
250
251 server_thread.join();
252 }
253