http_get_lang

#include <net_config.h>

U8* http_get_lang (void);

The http_get_lang function retrieves the preferred language setting from the browser. You can use this information to implement automatic language selection for your embedded web pages.

The http_get_lang function is a system function that is in the RL-TCPnet library. The prototype is defined in net_config.h.

Note

• When a web browser requests a web page, it specifies the preferred language in the HTTP header that is sent to the web server. This information is processed by TCPnet and stored internally.
• You can set the language preference in Internet Explorer by selecting Tools -> Internet Options -> Languages. In Mozilla Firefox, you can set the language preference by selecting Tools -> Options -> Content -> Languages.

The http_get_lang function returns a pointer to the language code, which is a null-terminated string.

cgi_func

U16 cgi_func (U8 *env, U8 *buf, U16 buflen, U32 *pcgi) {
  U16 len = 0;
  U8 *lang;

  switch (env[0]) {
     ..
    case 'e':
      /* Browser Language - file 'language.cgi' */
      lang = http_get_lang();
      if (strcmp (lang, "en") == 0) {
        lang = "English";
      }
      else if (strcmp (lang, "en-us") == 0) {
        lang = "English USA";
      }
      else if (strcmp (lang, "de") == 0) {
        lang = "German";
      }
      else if (strcmp (lang, "de-at") == 0) {
        lang = "German AT";
      }
      else if (strcmp (lang, "fr") == 0) {
        lang = "French";
      }
      else {
        lang = "Unknown";
      }
      len = sprintf(buf,&env[2],lang,http_get_lang());
      break;
  }
  return (len);
}