renamed example files

http_examples.cpp

@@ -0,0 +1,151 @@
+#include "server_http.hpp"
+#include "client_http.hpp"
+
+//Added for the json-example
+#include <boost/property_tree/ptree.hpp>
+#include <boost/property_tree/json_parser.hpp>
+
+//Added for the default_resource example
+#include<fstream>
+
+using namespace std;
+using namespace SimpleWeb;
+//Added for the json-example:
+using namespace boost::property_tree;
+
+//TODO Client: support Chunked transfer encoding
+//TODO Client<HTTPS>
+
+int main() {
+    //HTTP-server at port 8080 using 4 threads
+    Server<HTTP> server(8080, 4);
+    
+    //Add resources using regular expression for path, a method-string, and an anonymous function
+    //POST-example for the path /string, responds the posted string
+    //  If C++14: use 'auto' instead of 'shared_ptr<Server<HTTPS>::Request>'
+    server.resource["^/string/?$"]["POST"]=[](ostream& response, shared_ptr<Server<HTTP>::Request> request) {
+        //Retrieve string from istream (*request.content)
+        stringstream ss;
+        request->content >> ss.rdbuf();
+        string content=ss.str();
+        
+        response << "HTTP/1.1 200 OK\r\nContent-Length: " << content.length() << "\r\n\r\n" << content;
+    };
+    
+    //POST-example for the path /json, responds firstName+" "+lastName from the posted json
+    //Responds with an appropriate error message if the posted json is not valid, or if firstName or lastName is missing
+    //Example posted json:
+    //{
+    //  "firstName": "John",
+    //  "lastName": "Smith",
+    //  "age": 25
+    //}
+    server.resource["^/json/?$"]["POST"]=[](ostream& response, shared_ptr<Server<HTTP>::Request> request) {
+        try {
+            ptree pt;
+            read_json(request->content, pt);
+
+            string name=pt.get<string>("firstName")+" "+pt.get<string>("lastName");
+
+            response << "HTTP/1.1 200 OK\r\nContent-Length: " << name.length() << "\r\n\r\n" << name;
+        }
+        catch(exception& e) {
+            response << "HTTP/1.1 400 Bad Request\r\nContent-Length: " << strlen(e.what()) << "\r\n\r\n" << e.what();
+        }
+    };
+    
+    //GET-example for the path /info
+    //Responds with request-information
+    server.resource["^/info/?$"]["GET"]=[](ostream& response, shared_ptr<Server<HTTP>::Request> request) {
+        stringstream content_stream;
+        content_stream << "<h1>Request:</h1>";
+        content_stream << request->method << " " << request->path << " HTTP/" << request->http_version << "<br>";
+        for(auto& header: request->header) {
+            content_stream << header.first << ": " << header.second << "<br>";
+        }
+        
+        //find length of content_stream (length received using content_stream.tellp())
+        content_stream.seekp(0, ios::end);
+        
+        response <<  "HTTP/1.1 200 OK\r\nContent-Length: " << content_stream.tellp() << "\r\n\r\n" << content_stream.rdbuf();
+    };
+    
+    //GET-example for the path /match/[number], responds with the matched string in path (number)
+    //For instance a request GET /match/123 will receive: 123
+    server.resource["^/match/([0-9]+)/?$"]["GET"]=[](ostream& response, shared_ptr<Server<HTTP>::Request> request) {
+        string number=request->path_match[1];
+        response << "HTTP/1.1 200 OK\r\nContent-Length: " << number.length() << "\r\n\r\n" << number;
+    };
+    
+    //Default GET-example. If no other matches, this anonymous function will be called. 
+    //Will respond with content in the web/-directory, and its subdirectories.
+    //Default file: index.html
+    //Can for instance be used to retrieve an HTML 5 client that uses REST-resources on this server
+    server.default_resource["^/?(.*)$"]["GET"]=[](ostream& response, shared_ptr<Server<HTTP>::Request> request) {
+        string filename="web/";
+        
+        string path=request->path_match[1];
+        
+        //Remove all but the last '.' (so we can't leave the web-directory)
+        size_t last_pos=path.rfind(".");
+        size_t current_pos=0;
+        size_t pos;
+        while((pos=path.find('.', current_pos))!=string::npos && pos!=last_pos) {
+            current_pos=pos;
+            path.erase(pos, 1);
+            last_pos--;
+        }
+        
+        filename+=path;
+        ifstream ifs;
+        //A simple platform-independent file-or-directory check do not exist, but this works in most of the cases:
+        if(filename.find('.')==string::npos) {
+            if(filename[filename.length()-1]!='/')
+                filename+='/';
+            filename+="index.html";
+        }
+        ifs.open(filename, ifstream::in);
+        
+        if(ifs) {
+            ifs.seekg(0, ios::end);
+            size_t length=ifs.tellg();
+            
+            ifs.seekg(0, ios::beg);
+
+            //The file-content is copied to the response-stream. Should not be used for very large files.
+            response << "HTTP/1.1 200 OK\r\nContent-Length: " << length << "\r\n\r\n" << ifs.rdbuf();
+
+            ifs.close();
+        }
+        else {
+            string content="Could not open file "+filename;
+            response << "HTTP/1.1 400 Bad Request\r\nContent-Length: " << content.length() << "\r\n\r\n" << content;
+        }
+    };
+    
+    thread server_thread([&server](){
+        //Start WS-server
+        server.start();
+    });
+    
+    //Wait for server to start so that the client can connect
+    this_thread::sleep_for(chrono::seconds(1));
+    
+    //Client examples
+    Client<HTTP> client("localhost:8080");
+    auto r1=client.request("GET", "/match/123");
+    cout << r1->content.rdbuf() << endl;
+
+    string json="{\"firstName\": \"John\",\"lastName\": \"Smith\",\"age\": 25}";
+    stringstream ss(json);    
+    auto r2=client.request("POST", "/string", ss);
+    cout << r2->content.rdbuf() << endl;
+    
+    ss.str(json);
+    auto r3=client.request("POST", "/json", ss);
+    cout << r3->content.rdbuf() << endl;
+    
+    server_thread.join();
+    
+    return 0;
+}