5 * \defgroup LocaleHeaderParser Parse the browser http locale headers and set the NLS stuff.
6 * \ingroup WebcitHttpServer
9 /** we need _GNU_SOURCE for various functions arround the NLS-Stuff */
12 #include "webserver.h"
16 #define NUM_LANGS 5 /**< how many different locales do we know? */
17 #define SEARCH_LANG 20 /**< how many langs should we parse? */
19 /** actual supported locales */
20 char *AvailLang[NUM_LANGS] = {
28 locale_t wc_locales[NUM_LANGS]; /**< here we keep the parsed stuff */
30 /** Keep information about one locale */
31 typedef struct _lang_pref{
32 char lang[16]; /**< the language locale string */
33 char region[16]; /**< the region locale string */
34 long priority; /**< which priority does it have */
35 int availability; /**< do we know it? */
36 int selectedlang; /**< is this the selected language? */
39 /* \brief parse browser locale header
40 * seems as most browsers just do a one after coma value even if more than 10 locales are available. Sample strings:
42 * 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
44 * Accept-Language: 'de-de,en-us;q=0.7,en;q=0.3'
45 * Accept-Language: de,en-ph;q=0.8,en-us;q=0.5,de-at;q=0.3
46 * 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
47 * \param LocaleString the string from the browser http headers
50 void httplang_to_locale(char *LocaleString)
52 LangStruct wanted_locales[SEARCH_LANG];
57 size_t len = strlen(LocaleString);
62 char *search = (char *) malloc(len);
63 // locale_t my_Locale;
64 // locale_t my_Empty_Locale;
66 memcpy(search, LocaleString, len);
68 nParts=num_tokens(search,',');
69 for (i=0; ((i<nParts)&&(i<SEARCH_LANG)); i++)
76 ls=&wanted_locales[i];
78 extract_token(&buf[0],search, i,',',16);
79 /** we are searching, if this list item has something like ;q=n*/
80 if (num_tokens(&buf[0],'=')>1) {
82 extract_token(&sbuf[0],&buf[0], 1,'=',16);
83 sbuflen=strlen(&sbuf[0]);
84 for (k=0; k<sbuflen; k++) if (sbuf[k]=='.') sbuf[k]='0';
85 ls->priority=atol(&sbuf[0]);
90 /** get the locale part */
91 extract_token(&sbuf[0],&buf[0],0,';',16);
92 /** get the lang part, which should be allways there */
93 extract_token(&ls->lang[0],&sbuf[0],0,'-',16);
94 /** get the area code if any. */
95 if (num_tokens(&sbuf[0],'-')>1) {
96 extract_token(&ls->region[0],&sbuf[0],1,'-',16);
98 else { /** no ara code? use lang code */
99 blen=strlen(&ls->lang[0]);
100 memcpy(&ls->region[0], ls->lang,blen);
101 ls->region[blen]='\0';
102 } /** area codes are uppercase */
103 blen=strlen(&ls->region[0]);
104 for (j=0; j<blen; j++)
106 int chars=toupper(ls->region[j]);
107 ls->region[j]=(char)chars;/** \todo ?! */
109 sprintf(&lbuf[0],"%s_%s",&ls->lang[0],&ls->region[0]);
111 /** check if we have this lang */
114 for (j=0; j<NUM_LANGS; j++) {
116 /** match against the LANG part */
117 result=strcasecmp(&ls->lang[0], AvailLang[j]);
118 if ((result<0)&&(result<ls->availability)){
119 ls->availability=result;
122 /** match against lang and locale */
123 if (0==strcasecmp(&lbuf[0], AvailLang[j])){
134 for (i=0; ((i<nParts)&&(i<SEARCH_LANG)); i++)
136 ls=&wanted_locales[i];
137 if ((ls->availability<=0)&&
138 (av<ls->availability)&&
139 (prio<ls->priority)&&
140 (ls->selectedlang!=-1)){
141 nBest=ls->selectedlang;
146 if (nBest==-1) /** fall back to C */
148 WC->selected_language=nBest;
149 lprintf(9, "language found: %s\n", AvailLang[WC->selected_language]);
150 // set_selected_language(selected_locale);
153 /* TODO: we skip the language weightening so far. */
154 /* Accept-Language: 'de-de,en-us;q=0.7,en;q=0.3' */
155 /* Accept-Language: de,en-ph;q=0.8,en-us;q=0.5,de-at;q=0.3 */
156 //void httplang_to_locale(char *LocaleString)
158 // char selected_locale[16];
161 // int num_accept = 0;
163 // lprintf(9, "languageAccept: %s\n", LocaleString);
165 // strcpy(selected_locale, "C");
166 // num_accept = num_tokens(LocaleString, ',');
168 // for (i=num_accept-1; i>=0; --i) {
169 // extract_token(lang, LocaleString, i, ',', sizeof lang);
171 // /* Strip out the weights; we don't use them. Also convert
172 // * hyphens to underscores.
174 // for (j=0; j<strlen(lang); ++j) {
175 // if (lang[j] == '-') lang[j] = '_';
176 // if (lang[j] == ';') lang[j] = 0;
179 // for (j=0; j<NUM_LANGS; ++j) {
180 // if (!strncasecmp(lang, AvailLang[j], strlen(lang))) {
181 // strcpy(selected_locale, AvailLang[j]);
186 // lprintf(9, "language found: %s\n", selected_locale);
187 // set_selected_language(selected_locale);
192 * \brief show the language chooser on the login dialog
193 * depending on the browser locale change the sequence of the
196 void offer_languages(void) {
199 wprintf("<select name=\"language\" size=\"1\">\n");
201 for (i=0; i < NUM_LANGS; ++i) {
202 wprintf("<option %s value=%s>%s</option>\n",
203 ((WC->selected_language == i) ? "selected" : ""),
209 wprintf("</select>\n");
213 * \brief Set the selected language for this session.
214 * \param lang the locale to set.
216 void set_selected_language(char *lang) {
219 for (i=0; i<NUM_LANGS; ++i) {
220 if (!strcasecmp(lang, AvailLang[i])) {
221 WC->selected_language = i;
227 * \brief Activate the selected language for this session.
229 void go_selected_language(void) {
230 if (WC->selected_language < 0) return;
231 uselocale(wc_locales[WC->selected_language]); /** switch locales */
232 textdomain(textdomain(NULL)); /** clear the cache */
236 * \brief Deactivate the selected language for this session.
238 void stop_selected_language(void) {
239 uselocale(LC_GLOBAL_LOCALE); /** switch locales */
240 textdomain(textdomain(NULL)); /** clear the cache */
245 * \brief Create a locale_t for each available language
247 void initialize_locales(void) {
249 locale_t Empty_Locale;
252 /* create default locale */
253 Empty_Locale = newlocale(LC_ALL_MASK, NULL, NULL);
255 for (i = 0; i < NUM_LANGS; ++i) {
256 sprintf(buf, "%s.UTF8", AvailLang[i]);
257 wc_locales[i] = newlocale(LC_MESSAGES_MASK /* |LC_TIME_MASK FIXME */ ,
265 #else /* ENABLE_NLS */
266 /** \brief dummy for non NLS enabled systems */
267 void offer_languages(void) {
268 wprintf("English (US)");
271 /** \brief dummy for non NLS enabled systems */
272 void set_selected_language(char *lang) {
275 /** \brief dummy for non NLS enabled systems */
276 void go_selected_language(void) {
279 /** \brief dummy for non NLS enabled systems */
280 void stop_selected_language(void) {
283 #endif /* ENABLE_NLS */