447 lines
12 KiB
C++
447 lines
12 KiB
C++
/* Copyright (c) 2013-2018 the Civetweb developers
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* Copyright (c) 2013 No Face Press, LLC
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* License http://opensource.org/licenses/mit-license.php MIT License
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*/
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// Simple example program on how to use Embedded C++ interface.
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#include "CivetServer.h"
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#include <cstring>
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#ifdef _WIN32
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#include <windows.h>
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#else
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#include <unistd.h>
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#endif
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#define DOCUMENT_ROOT "."
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#define PORT "8081"
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#define EXAMPLE_URI "/example"
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#define EXIT_URI "/exit"
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/* Exit flag for main loop */
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volatile bool exitNow = false;
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class ExampleHandler : public CivetHandler
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{
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public:
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bool
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handleGet(CivetServer *server, struct mg_connection *conn)
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{
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mg_printf(conn,
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"HTTP/1.1 200 OK\r\nContent-Type: "
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"text/html\r\nConnection: close\r\n\r\n");
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mg_printf(conn, "<html><body>\r\n");
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mg_printf(conn,
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"<h2>This is an example text from a C++ handler</h2>\r\n");
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mg_printf(conn,
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"<p>To see a page from the A handler <a "
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"href=\"a\">click here</a></p>\r\n");
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mg_printf(conn,
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"<form action=\"a\" method=\"get\">"
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"To see a page from the A handler with a parameter "
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"<input type=\"submit\" value=\"click here\" "
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"name=\"param\" \\> (GET)</form>\r\n");
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mg_printf(conn,
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"<form action=\"a\" method=\"post\">"
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"To see a page from the A handler with a parameter "
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"<input type=\"submit\" value=\"click here\" "
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"name=\"param\" \\> (POST)</form>\r\n");
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mg_printf(conn,
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"<p>To see a page from the A/B handler <a "
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"href=\"a/b\">click here</a></p>\r\n");
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mg_printf(conn,
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"<p>To see a page from the *.foo handler <a "
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"href=\"xy.foo\">click here</a></p>\r\n");
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mg_printf(conn,
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"<p>To see a page from the WebSocket handler <a "
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"href=\"ws\">click here</a></p>\r\n");
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mg_printf(conn,
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"<p>To exit <a href=\"%s\">click here</a></p>\r\n",
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EXIT_URI);
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mg_printf(conn, "</body></html>\r\n");
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return true;
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}
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};
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class ExitHandler : public CivetHandler
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{
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public:
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bool
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handleGet(CivetServer *server, struct mg_connection *conn)
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{
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mg_printf(conn,
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"HTTP/1.1 200 OK\r\nContent-Type: "
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"text/plain\r\nConnection: close\r\n\r\n");
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mg_printf(conn, "Bye!\n");
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exitNow = true;
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return true;
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}
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};
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class AHandler : public CivetHandler
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{
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private:
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bool
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handleAll(const char *method,
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CivetServer *server,
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struct mg_connection *conn)
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{
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std::string s = "";
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mg_printf(conn,
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"HTTP/1.1 200 OK\r\nContent-Type: "
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"text/html\r\nConnection: close\r\n\r\n");
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mg_printf(conn, "<html><body>");
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mg_printf(conn, "<h2>This is the A handler for \"%s\" !</h2>", method);
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if (CivetServer::getParam(conn, "param", s)) {
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mg_printf(conn, "<p>param set to %s</p>", s.c_str());
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} else {
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mg_printf(conn, "<p>param not set</p>");
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}
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mg_printf(conn, "</body></html>\n");
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return true;
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}
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public:
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bool
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handleGet(CivetServer *server, struct mg_connection *conn)
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{
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return handleAll("GET", server, conn);
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}
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bool
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handlePost(CivetServer *server, struct mg_connection *conn)
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{
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return handleAll("POST", server, conn);
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}
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};
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class ABHandler : public CivetHandler
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{
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public:
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bool
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handleGet(CivetServer *server, struct mg_connection *conn)
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{
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mg_printf(conn,
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"HTTP/1.1 200 OK\r\nContent-Type: "
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"text/html\r\nConnection: close\r\n\r\n");
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mg_printf(conn, "<html><body>");
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mg_printf(conn, "<h2>This is the AB handler!!!</h2>");
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mg_printf(conn, "</body></html>\n");
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return true;
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}
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};
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class FooHandler : public CivetHandler
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{
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public:
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bool
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handleGet(CivetServer *server, struct mg_connection *conn)
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{
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/* Handler may access the request info using mg_get_request_info */
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const struct mg_request_info *req_info = mg_get_request_info(conn);
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mg_printf(conn,
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"HTTP/1.1 200 OK\r\nContent-Type: "
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"text/html\r\nConnection: close\r\n\r\n");
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mg_printf(conn, "<html><body>\n");
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mg_printf(conn, "<h2>This is the Foo GET handler!!!</h2>\n");
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mg_printf(conn,
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"<p>The request was:<br><pre>%s %s HTTP/%s</pre></p>\n",
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req_info->request_method,
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req_info->request_uri,
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req_info->http_version);
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mg_printf(conn, "</body></html>\n");
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return true;
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}
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bool
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handlePost(CivetServer *server, struct mg_connection *conn)
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{
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/* Handler may access the request info using mg_get_request_info */
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const struct mg_request_info *req_info = mg_get_request_info(conn);
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long long rlen, wlen;
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long long nlen = 0;
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long long tlen = req_info->content_length;
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char buf[1024];
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mg_printf(conn,
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"HTTP/1.1 200 OK\r\nContent-Type: "
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"text/html\r\nConnection: close\r\n\r\n");
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mg_printf(conn, "<html><body>\n");
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mg_printf(conn, "<h2>This is the Foo POST handler!!!</h2>\n");
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mg_printf(conn,
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"<p>The request was:<br><pre>%s %s HTTP/%s</pre></p>\n",
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req_info->request_method,
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req_info->request_uri,
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req_info->http_version);
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mg_printf(conn, "<p>Content Length: %li</p>\n", (long)tlen);
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mg_printf(conn, "<pre>\n");
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while (nlen < tlen) {
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rlen = tlen - nlen;
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if (rlen > sizeof(buf)) {
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rlen = sizeof(buf);
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}
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rlen = mg_read(conn, buf, (size_t)rlen);
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if (rlen <= 0) {
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break;
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}
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wlen = mg_write(conn, buf, (size_t)rlen);
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if (wlen != rlen) {
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break;
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}
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nlen += wlen;
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}
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mg_printf(conn, "\n</pre>\n");
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mg_printf(conn, "</body></html>\n");
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return true;
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}
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#define fopen_recursive fopen
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bool
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handlePut(CivetServer *server, struct mg_connection *conn)
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{
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/* Handler may access the request info using mg_get_request_info */
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const struct mg_request_info *req_info = mg_get_request_info(conn);
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long long rlen, wlen;
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long long nlen = 0;
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long long tlen = req_info->content_length;
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FILE * f;
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char buf[1024];
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int fail = 0;
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#ifdef _WIN32
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_snprintf(buf, sizeof(buf), "D:\\somewhere\\%s\\%s", req_info->remote_user, req_info->local_uri);
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buf[sizeof(buf)-1] = 0;
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if (strlen(buf)>255) {
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/* Windows will not work with path > 260 (MAX_PATH), unless we use
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* the unicode API. However, this is just an example code: A real
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* code will probably never store anything to D:\\somewhere and
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* must be adapted to the specific needs anyhow. */
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fail = 1;
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f = NULL;
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} else {
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f = fopen_recursive(buf, "wb");
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}
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#else
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snprintf(buf, sizeof(buf), "~/somewhere/%s/%s", req_info->remote_user, req_info->local_uri);
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buf[sizeof(buf)-1] = 0;
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if (strlen(buf)>1020) {
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/* The string is too long and probably truncated. Make sure an
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* UTF-8 string is never truncated between the UTF-8 code bytes.
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* This example code must be adapted to the specific needs. */
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fail = 1;
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f = NULL;
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} else {
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f = fopen_recursive(buf, "w");
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}
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#endif
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if (!f) {
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fail = 1;
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} else {
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while (nlen < tlen) {
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rlen = tlen - nlen;
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if (rlen > sizeof(buf)) {
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rlen = sizeof(buf);
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}
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rlen = mg_read(conn, buf, (size_t)rlen);
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if (rlen <= 0) {
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fail = 1;
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break;
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}
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wlen = fwrite(buf, 1, (size_t)rlen, f);
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if (wlen != rlen) {
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fail = 1;
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break;
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}
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nlen += wlen;
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}
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fclose(f);
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}
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if (fail) {
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mg_printf(conn,
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"HTTP/1.1 409 Conflict\r\n"
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"Content-Type: text/plain\r\n"
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"Connection: close\r\n\r\n");
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} else {
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mg_printf(conn,
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"HTTP/1.1 201 Created\r\n"
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"Content-Type: text/plain\r\n"
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"Connection: close\r\n\r\n");
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}
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return true;
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}
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};
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class WsStartHandler : public CivetHandler
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{
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public:
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bool
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handleGet(CivetServer *server, struct mg_connection *conn)
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{
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mg_printf(conn,
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"HTTP/1.1 200 OK\r\nContent-Type: text/html\r\nConnection: "
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"close\r\n\r\n");
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mg_printf(conn, "<!DOCTYPE html>\n");
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mg_printf(conn, "<html>\n<head>\n");
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mg_printf(conn, "<meta charset=\"UTF-8\">\n");
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mg_printf(conn, "<title>Embedded websocket example</title>\n");
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#ifdef USE_WEBSOCKET
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/* mg_printf(conn, "<script type=\"text/javascript\"><![CDATA[\n"); ...
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* xhtml style */
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mg_printf(conn, "<script>\n");
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mg_printf(
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conn,
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"var i=0\n"
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"function load() {\n"
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" var wsproto = (location.protocol === 'https:') ? 'wss:' : 'ws:';\n"
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" connection = new WebSocket(wsproto + '//' + window.location.host + "
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"'/websocket');\n"
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" websock_text_field = "
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"document.getElementById('websock_text_field');\n"
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" connection.onmessage = function (e) {\n"
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" websock_text_field.innerHTML=e.data;\n"
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" i=i+1;"
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" connection.send(i);\n"
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" }\n"
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" connection.onerror = function (error) {\n"
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" alert('WebSocket error');\n"
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" connection.close();\n"
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" }\n"
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"}\n");
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/* mg_printf(conn, "]]></script>\n"); ... xhtml style */
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mg_printf(conn, "</script>\n");
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mg_printf(conn, "</head>\n<body onload=\"load()\">\n");
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mg_printf(
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conn,
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"<div id='websock_text_field'>No websocket connection yet</div>\n");
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#else
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mg_printf(conn, "</head>\n<body>\n");
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mg_printf(conn, "Example not compiled with USE_WEBSOCKET\n");
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#endif
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mg_printf(conn, "</body>\n</html>\n");
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return 1;
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}
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};
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#ifdef USE_WEBSOCKET
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class WebSocketHandler : public CivetWebSocketHandler {
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virtual bool handleConnection(CivetServer *server,
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const struct mg_connection *conn) {
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printf("WS connected\n");
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return true;
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}
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virtual void handleReadyState(CivetServer *server,
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struct mg_connection *conn) {
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printf("WS ready\n");
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const char *text = "Hello from the websocket ready handler";
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mg_websocket_write(conn, MG_WEBSOCKET_OPCODE_TEXT, text, strlen(text));
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}
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virtual bool handleData(CivetServer *server,
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struct mg_connection *conn,
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int bits,
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char *data,
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size_t data_len) {
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printf("WS got %lu bytes: ", (long unsigned)data_len);
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fwrite(data, 1, data_len, stdout);
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printf("\n");
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mg_websocket_write(conn, MG_WEBSOCKET_OPCODE_TEXT, data, data_len);
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return (data_len<4);
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}
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virtual void handleClose(CivetServer *server,
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const struct mg_connection *conn) {
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printf("WS closed\n");
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}
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};
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#endif
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int
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main(int argc, char *argv[])
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{
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mg_init_library(0);
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const char *options[] = {
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"document_root", DOCUMENT_ROOT, "listening_ports", PORT, 0};
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std::vector<std::string> cpp_options;
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for (int i=0; i<(sizeof(options)/sizeof(options[0])-1); i++) {
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cpp_options.push_back(options[i]);
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}
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// CivetServer server(options); // <-- C style start
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CivetServer server(cpp_options); // <-- C++ style start
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ExampleHandler h_ex;
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server.addHandler(EXAMPLE_URI, h_ex);
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ExitHandler h_exit;
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server.addHandler(EXIT_URI, h_exit);
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AHandler h_a;
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server.addHandler("/a", h_a);
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ABHandler h_ab;
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server.addHandler("/a/b", h_ab);
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WsStartHandler h_ws;
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server.addHandler("/ws", h_ws);
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#ifdef NO_FILES
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/* This handler will handle "everything else", including
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* requests to files. If this handler is installed,
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* NO_FILES should be set. */
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FooHandler h_foo;
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server.addHandler("", h_foo);
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printf("See a page from the \"all\" handler at http://localhost:%s/\n", PORT);
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#else
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FooHandler h_foo;
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server.addHandler("**.foo", h_foo);
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printf("Browse files at http://localhost:%s/\n", PORT);
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#endif
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#ifdef USE_WEBSOCKET
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WebSocketHandler h_websocket;
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server.addWebSocketHandler("/websocket", h_websocket);
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printf("Run websocket example at http://localhost:%s/ws\n", PORT);
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#endif
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printf("Run example at http://localhost:%s%s\n", PORT, EXAMPLE_URI);
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printf("Exit at http://localhost:%s%s\n", PORT, EXIT_URI);
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while (!exitNow) {
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#ifdef _WIN32
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Sleep(1000);
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#else
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sleep(1);
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#endif
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}
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printf("Bye!\n");
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mg_exit_library();
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return 0;
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}
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