/****************************************************************************** * snif.cpp 2000-05-28 AgF * * Demonstrating browser sniffer * ******************************************************************************/ #include // define cgi interface // The class BrowserSniffer detects the browser type and version number. // The type is returned in both name and type: // type name // ---------------------- // 0 Unknown // 1 Netscape // 2 Explorer // 3 Opera // 4 Amaya // ---------------------- // The version number is returned in version. class BrowserSniffer { public: BrowserSniffer(); // constructor char * name; // browser name (brand) int type; // browser type float version; // version number char * agent; // raw HTTP_USER_AGENT string private: int SearchFor(char * nm); // used by constructor }; BrowserSniffer::BrowserSniffer() { // the constructor does all the sniffing and sets name, type and version agent = getenv("HTTP_USER_AGENT"); if (!agent) agent = ""; name = "Unknown"; type = 0; version = 0; if (SearchFor("MSIE")) {name = "Explorer"; type = 2; return;} if (SearchFor("Opera")) {type = 3; return;} if (SearchFor("Amaya")) {type = 4; return;} if (SearchFor("Lynx")) {type = 0; return;} if (SearchFor("Mozilla")) { if (SearchFor("compatible")) { name = "Unknown"; type = 0;} else { name = "Netscape"; type = 1;}}} int BrowserSniffer::SearchFor(char * nm) { // search for the name nm and set name and versíon int len = strlen(nm); for (char * p = agent; *p; p++) { // search through string if (strncasecmp(p, nm, len) == 0) { // name found. search for version number name = nm; for (p++; *p; p++) { if (*p >= '0' && *p <= '9') { // number found version = atof(p); return 1;}} return 1;}} // not found return 0;} void main () { // create object BrowserSniffer browser; // output HTML code cout << "Browser sniffing\n"; cout << "\n\n"; cout << "

Browser sniffing

\n"; cout << "Browser type is " << browser.name << "
\n"; cout << "Version number is " << browser.version << ".\n"; cout << "";}