5 * \defgroup LocaleHeaderParser Parse the browser http locale headers and set the NLS stuff.
6 * \ingroup WebcitHttpServer
10 #include "webserver.h"
14 #define NUM_LANGS 8 /**< how many different locales do we know? */
15 #define SEARCH_LANG 20 /**< how many langs should we parse? */
17 /** actual supported locales */
18 char *AvailLang[NUM_LANGS] = {
29 locale_t wc_locales[NUM_LANGS]; /**< here we keep the parsed stuff */
31 /** Keep information about one locale */
32 typedef struct _lang_pref{
33 char lang[16]; /**< the language locale string */
34 char region[16]; /**< the region locale string */
35 long priority; /**< which priority does it have */
36 int availability; /**< do we know it? */
37 int selectedlang; /**< is this the selected language? */
40 /* \brief parse browser locale header
41 * seems as most browsers just do a one after coma value even if more than 10 locales are available. Sample strings:
43 * Accept-Language: sq;q=1.0,de;q=0.9,as;q=0.8,ar;q=0.7,bn;q=0.6,zh-cn;q=0.5,kn;q=0.4,ch;q=0.3,fo;q=0.2,gn;q=0.1,ce;q=0.1,ie;q=0.1
45 * Accept-Language: 'de-de,en-us;q=0.7,en;q=0.3'
46 * Accept-Language: de,en-ph;q=0.8,en-us;q=0.5,de-at;q=0.3
47 * Accept-Language: de,en-us;q=0.9,it;q=0.9,de-de;q=0.8,en-ph;q=0.7,de-at;q=0.7,zh-cn;q=0.6,cy;q=0.5,ar-om;q=0.5,en-tt;q=0.4,xh;q=0.3,nl-be;q=0.3,cs;q=0.2,sv;q=0.1,tk;q=0.1
48 * \param LocaleString the string from the browser http headers
51 void httplang_to_locale(char *LocaleString)
53 LangStruct wanted_locales[SEARCH_LANG];
58 /* size_t len = strlen(LocaleString); */
65 safestrncpy(search, LocaleString, sizeof search);
66 nParts=num_tokens(search,',');
67 for (i=0; ((i<nParts)&&(i<SEARCH_LANG)); i++)
74 ls=&wanted_locales[i];
76 extract_token(&buf[0],search, i,',',16);
77 /** we are searching, if this list item has something like ;q=n*/
78 if (num_tokens(&buf[0],'=')>1) {
80 extract_token(&sbuf[0],&buf[0], 1,'=',16);
81 sbuflen=strlen(&sbuf[0]);
82 for (k=0; k<sbuflen; k++) if (sbuf[k]=='.') sbuf[k]='0';
83 ls->priority=atol(&sbuf[0]);
88 /** get the locale part */
89 extract_token(&sbuf[0],&buf[0],0,';',16);
90 /** get the lang part, which should be allways there */
91 extract_token(&ls->lang[0],&sbuf[0],0,'-',16);
92 /** get the area code if any. */
93 if (num_tokens(&sbuf[0],'-')>1) {
94 extract_token(&ls->region[0],&sbuf[0],1,'-',16);
96 else { /** no ara code? use lang code */
97 blen=strlen(&ls->lang[0]);
98 memcpy(&ls->region[0], ls->lang,blen);
99 ls->region[blen]='\0';
100 } /** area codes are uppercase */
101 blen=strlen(&ls->region[0]);
102 for (j=0; j<blen; j++)
104 int chars=toupper(ls->region[j]);
105 ls->region[j]=(char)chars;/** \todo ?! */
107 sprintf(&lbuf[0],"%s_%s",&ls->lang[0],&ls->region[0]);
109 /** check if we have this lang */
112 for (j=0; j<NUM_LANGS; j++) {
114 /** match against the LANG part */
115 result=strcasecmp(&ls->lang[0], AvailLang[j]);
116 if ((result<0)&&(result<ls->availability)){
117 ls->availability=result;
120 /** match against lang and locale */
121 if (0==strcasecmp(&lbuf[0], AvailLang[j])){
132 for (i=0; ((i<nParts)&&(i<SEARCH_LANG)); i++) {
133 ls=&wanted_locales[i];
134 if ((ls->availability<=0)&&
135 (av<ls->availability)&&
136 (prio<ls->priority)&&
137 (ls->selectedlang!=-1)) {
138 nBest=ls->selectedlang;
144 /** fall back to C */
147 WC->selected_language=nBest;
148 lprintf(9, "language found: %s\n", AvailLang[WC->selected_language]);
151 /* TODO: we skip the language weighting so far. */
152 /* Accept-Language: 'de-de,en-us;q=0.7,en;q=0.3' */
153 /* Accept-Language: de,en-ph;q=0.8,en-us;q=0.5,de-at;q=0.3 */
154 //void httplang_to_locale(char *LocaleString)
156 // char selected_locale[16];
159 // int num_accept = 0;
161 // lprintf(9, "languageAccept: %s\n", LocaleString);
163 // strcpy(selected_locale, "C");
164 // num_accept = num_tokens(LocaleString, ',');
166 // for (i=num_accept-1; i>=0; --i) {
167 // extract_token(lang, LocaleString, i, ',', sizeof lang);
169 // /* Strip out the weights; we don't use them. Also convert
170 // * hyphens to underscores.
172 // for (j=0; j<strlen(lang); ++j) {
173 // if (lang[j] == '-') lang[j] = '_';
174 // if (lang[j] == ';') lang[j] = 0;
177 // for (j=0; j<NUM_LANGS; ++j) {
178 // if (!strncasecmp(lang, AvailLang[j], strlen(lang))) {
179 // strcpy(selected_locale, AvailLang[j]);
184 // lprintf(9, "language found: %s\n", selected_locale);
185 // set_selected_language(selected_locale);
190 * \brief show the language chooser on the login dialog
191 * depending on the browser locale change the sequence of the
194 void offer_languages(void) {
197 wprintf("<select name=\"language\" size=\"1\">\n");
199 for (i=0; i < NUM_LANGS; ++i) {
200 wprintf("<option %s value=%s>%s</option>\n",
201 ((WC->selected_language == i) ? "selected" : ""),
207 wprintf("</select>\n");
211 * \brief Set the selected language for this session.
212 * \param lang the locale to set.
214 void set_selected_language(char *lang) {
217 for (i=0; i<NUM_LANGS; ++i) {
218 if (!strcasecmp(lang, AvailLang[i])) {
219 WC->selected_language = i;
225 * \brief Activate the selected language for this session.
227 void go_selected_language(void) {
228 if (WC->selected_language < 0) return;
229 uselocale(wc_locales[WC->selected_language]); /** switch locales */
230 textdomain(textdomain(NULL)); /** clear the cache */
234 * \brief Deactivate the selected language for this session.
236 void stop_selected_language(void) {
237 uselocale(LC_GLOBAL_LOCALE); /** switch locales */
238 textdomain(textdomain(NULL)); /** clear the cache */
243 * \brief Create a locale_t for each available language
245 void initialize_locales(void) {
247 locale_t Empty_Locale;
250 /* create default locale */
251 Empty_Locale = newlocale(LC_ALL_MASK, NULL, NULL);
253 for (i = 0; i < NUM_LANGS; ++i) {
255 sprintf(buf, "%s", AvailLang[i]); // locale 0 (C) is ascii, not utf-8
258 sprintf(buf, "%s.UTF8", AvailLang[i]);
260 wc_locales[i] = newlocale(
261 (LC_MESSAGES_MASK|LC_TIME_MASK),
263 (((i > 0) && (wc_locales[0] != NULL)) ? wc_locales[0] : Empty_Locale)
265 if (wc_locales[i] == NULL) {
266 lprintf(1, "Error configuring locale for %s: %s\n",
272 lprintf(3, "Configured available locale: %s\n", buf);
278 #else /* ENABLE_NLS */
279 /** \brief dummy for non NLS enabled systems */
280 void offer_languages(void) {
281 wprintf("English (US)");
284 /** \brief dummy for non NLS enabled systems */
285 void set_selected_language(char *lang) {
288 /** \brief dummy for non NLS enabled systems */
289 void go_selected_language(void) {
292 /** \brief dummy for non NLS enabled systems */
293 void stop_selected_language(void) {
296 #endif /* ENABLE_NLS */