Basic IDN/IRI support

src/host.c

@@ -716,7 +716,7 @@ lookup_host (const char *host, int flags)
     {
       char *str = NULL, *name;
 
-      if (opt.enable_iri && (name = idn_decode (host)) != NULL)
+      if (opt.enable_iri && (name = idn_decode ((char *) host)) != NULL)
         {
           int len = strlen (host) + strlen (name) + 4;
           str = xmalloc (len);

src/html-url.c

@@ -274,6 +274,7 @@ append_url (const char *link_uri,
   struct urlpos *newel;
   const char *base = ctx->base ? ctx->base : ctx->parent_base;
   struct url *url;
+  bool utf8_encode = false;
 
   if (!base)
     {
@@ -292,7 +293,7 @@ append_url (const char *link_uri,
           return NULL;
         }
 
-      url = url_parse (link_uri, NULL);
+      url = url_parse (link_uri, NULL, &utf8_encode);
       if (!url)
         {
           DEBUGP (("%s: link \"%s\" doesn't parse.\n",
@@ -311,7 +312,7 @@ append_url (const char *link_uri,
       DEBUGP (("%s: merge(\"%s\", \"%s\") -> %s\n",
                ctx->document_file, base, link_uri, complete_uri));
 
-      url = url_parse (complete_uri, NULL);
+      url = url_parse (complete_uri, NULL, &utf8_encode);
       if (!url)
         {
           DEBUGP (("%s: merged link \"%s\" doesn't parse.\n",
@@ -549,9 +550,9 @@ tag_handle_meta (int tagid, struct taginfo *tag, struct map_context *ctx)
       if (!mcharset)
         return;
 
-      logprintf (LOG_VERBOSE, "Meta tag charset : %s\n", quote (mcharset));
+      /*logprintf (LOG_VERBOSE, "Meta tag charset : %s\n", quote (mcharset));*/
 
-      /* sXXXav: Not used yet */
+      set_current_charset (mcharset);
       xfree (mcharset);
     }
   else if (name && 0 == strcasecmp (name, "robots"))
@@ -660,6 +661,7 @@ get_urls_file (const char *file)
   struct file_memory *fm;
   struct urlpos *head, *tail;
   const char *text, *text_end;
+  bool utf8_encode = false;
 
   /* Load the file.  */
   fm = read_file (file);
@@ -711,7 +713,7 @@ get_urls_file (const char *file)
           url_text = merged;
         }
 
-      url = url_parse (url_text, &up_error_code);
+      url = url_parse (url_text, &up_error_code, &utf8_encode);
       if (!url)
         {
           logprintf (LOG_NOTQUIET, _("%s: Invalid URL %s: %s\n"),

src/http.c

@@ -2055,7 +2055,7 @@ File %s already there; not retrieving.\n\n"), quote (hs->local_file));
 
           /* Try to get remote encoding if needed */
           if (opt.enable_iri && !opt.encoding_remote)
-            /* xxx = */ parse_charset (tmp2);
+            set_current_charset (parse_charset (tmp2));
         }
     }
   hs->newloc = resp_header_strdup (resp, "Location");

src/iri.c

@@ -41,6 +41,8 @@ as that of the covered work.  */
 #include "utils.h"
 #include "iri.h"
 
+char *remote;
+char *current;
 
 static iconv_t locale2utf8;
 
@@ -80,7 +82,7 @@ parse_charset (char *str)
       return NULL;
     }
 
-  logprintf (LOG_VERBOSE, "parse_charset: %s\n", quote (charset));
+  /*logprintf (LOG_VERBOSE, "parse_charset: %s\n", quote (charset));*/
 
   return charset;
 }
@@ -222,15 +224,29 @@ do_conversion (iconv_t cd, char *in, size_t inlen, char **out)
 
 /* Try to ASCII encode UTF-8 host. Return the new domain on success or NULL
    on error. */
-char *idn_encode (char *host)
+char *
+idn_encode (char *host, bool utf8_encoded)
 {
   char *new;
   int ret;
 
+  /* Encode to UTF-8 if not done using current remote */
+  if (!utf8_encoded)
+    {
+      if (!remote_to_utf8 ((const char *) host, (const char **) &new))
+        {
+          /* Nothing to encode or an error occured */
+          return NULL;
+        }
+
+      host = new;
+    }
+
   /* toASCII UTF-8 NULL terminated string */
   ret = idna_to_ascii_8z (host, &new, 0);
   if (ret != IDNA_SUCCESS)
     {
+      /* sXXXav : free new when needed ! */
       logprintf (LOG_VERBOSE, "idn_encode failed (%d): %s\n", ret,
                  quote (idna_strerror (ret)));
       return NULL;
@@ -241,7 +257,8 @@ char *idn_encode (char *host)
 
 /* Try to decode an ASCII encoded host. Return the new domain in the locale on
    success or NULL on error. */
-char *idn_decode (char *host)
+char *
+idn_decode (char *host)
 {
   char *new;
   int ret;
@@ -257,4 +274,87 @@ char *idn_decode (char *host)
   return new;
 }
 
+/* Return a new string */
+bool
+remote_to_utf8 (const char *str, const char **new)
+{
+  char *remote;
+  iconv_t cd;
+  bool ret = false;
+
+  if (opt.encoding_remote)
+    remote = opt.encoding_remote;
+  else if (current)
+    remote = current;
+  else
+    return false;
+
+  cd = iconv_open ("UTF-8", remote);
+  if (cd == (iconv_t)(-1))
+    return false;
+
+  if (do_conversion (cd, (char *) str, strlen ((char *) str), (char **) new))
+    ret = true;
+
+  iconv_close (cd);
+
+  /* Test if something was converted */
+  if (!strcmp (str, *new))
+    {
+      xfree ((char *) *new);
+      return false;
+    }
+
+  return ret;
+}
+
+char *get_remote_charset (void)
+{
+  return remote;
+}
+
+char *get_current_charset (void)
+{
+  return current;
+}
+
+void set_current_charset (char *charset)
+{
+  /*printf("[ current = `%s'\n", charset);*/
+
+  if (current)
+    xfree (current);
+
+  current = charset ? xstrdup (charset) : NULL;
+}
+
+void set_current_as_locale (void)
+{
+  /*printf("[ current = locale = `%s'\n", opt.locale);*/
+  if (current)
+    xfree (current);
+
+  /* sXXXav : assert opt.locale NULL ? */
+  current = xstrdup (opt.locale);
+}
+
+void
+set_remote_charset (char *charset)
+{
+  /*printf("[ remote = `%s'\n", charset);*/
+  if (remote)
+    xfree (remote);
+
+  remote = charset ? xstrdup (charset) : NULL;
+}
+
+void
+set_remote_as_current (void)
+{
+  /*printf("[ remote = current = `%s'\n", current);*/
+  if (remote)
+    xfree (remote);
+
+  remote = current ? xstrdup (current) : NULL;
+}
 

src/iri.h

@@ -36,8 +36,16 @@ char *parse_charset (char *str);
 char *find_locale (void);
 bool check_encoding_name (char *encoding);
 const char *locale_to_utf8 (const char *str);
-char *idn_encode (char *host);
+char *idn_encode (char *host, bool utf8_encoded);
 char *idn_decode (char *host);
+char *get_remote_charset (void);
+char *get_current_charset (void);
+void set_current_charset (char *charset);
+void set_current_as_locale (void);
+void set_current_charset (char *charset);
+void set_remote_charset (char *charset);
+void set_remote_as_current (void);
+bool remote_to_utf8 (const char *str, const char **new);
 
 #else /* ENABLE_IRI */
 
@@ -45,8 +53,16 @@ char *idn_decode (char *host);
 #define find_locale()               NULL
 #define check_encoding_name(str)    false
 #define locale_to_utf8(str)         (str)
-#define idn_encode(str)             NULL
+#define idn_encode(str,encoded)     NULL
 #define idn_decode(str)             NULL
+#define get_remote_charset()        NULL
+#define get_current_charset()       NULL
+#define set_current_charset(str)
+#define set_current_as_locale()
+#define set_current_charset(str)
+#define set_remote_charset(str)
+#define set_remote_as_current()
+#define remote_to_utf8(a,b)         false
 
 #endif /* ENABLE_IRI */
 #endif /* IRI_H */

src/main.c

@@ -1067,16 +1067,16 @@ for details.\n\n"));
 #ifdef ENABLE_IRI
   if (opt.enable_iri)
     {
-      if (opt.locale && !check_encoding_name(opt.locale))
+      if (opt.locale && !check_encoding_name (opt.locale))
         opt.locale = NULL;
 
       if (!opt.locale)
         opt.locale = find_locale ();
 
-      if (opt.encoding_remote && !check_encoding_name(opt.encoding_remote))
+      if (opt.encoding_remote && !check_encoding_name (opt.encoding_remote))
         opt.encoding_remote = NULL;
 
-      logprintf (LOG_VERBOSE, "Locale = %s\n", quote (opt.locale));
+      /*logprintf (LOG_VERBOSE, "Locale = %s\n", quote (opt.locale));*/
     }
 #else
   if (opt.enable_iri || opt.locale || opt.encoding_remote)
@@ -1190,6 +1190,8 @@ WARNING: Can't reopen standard output in binary mode;\n\
       char *filename = NULL, *redirected_URL = NULL;
       int dt;
 
+      set_current_as_locale ();
+
       if ((opt.recursive || opt.page_requisites)
           && (url_scheme (*t) != SCHEME_FTP || url_uses_proxy (*t)))
         {
@@ -1204,7 +1206,10 @@ WARNING: Can't reopen standard output in binary mode;\n\
           opt.follow_ftp = old_follow_ftp;
         }
       else
+        {
+          set_remote_as_current ();
           status = retrieve_url (*t, &filename, &redirected_URL, NULL, &dt, opt.recursive);
+        }
 
       if (opt.delete_after && file_exists_p(filename))
         {

src/recur.c

@@ -49,6 +49,7 @@ as that of the covered work.  */
 #include "res.h"
 #include "convert.h"
 #include "spider.h"
+#include "iri.h"
 
 /* Functions for maintaining the URL queue.  */
 
@@ -58,7 +59,7 @@ struct queue_element {
   int depth;                    /* the depth */
   bool html_allowed;            /* whether the document is allowed to
                                    be treated as HTML. */
-
+  char *remote_encoding;
   struct queue_element *next;   /* next element in queue */
 };
 
@@ -94,12 +95,18 @@ url_enqueue (struct url_queue *queue,
              const char *url, const char *referer, int depth, bool html_allowed)
 {
   struct queue_element *qel = xnew (struct queue_element);
+  char *charset = get_current_charset ();
   qel->url = url;
   qel->referer = referer;
   qel->depth = depth;
   qel->html_allowed = html_allowed;
   qel->next = NULL;
 
+  if (charset)
+    qel->remote_encoding = xstrdup (charset);
+  else
+    qel->remote_encoding = NULL;
+
   ++queue->count;
   if (queue->count > queue->maxcount)
     queue->maxcount = queue->count;
@@ -107,6 +114,8 @@ url_enqueue (struct url_queue *queue,
   DEBUGP (("Enqueuing %s at depth %d\n", url, depth));
   DEBUGP (("Queue count %d, maxcount %d.\n", queue->count, queue->maxcount));
 
+  /*printf ("[Enqueuing %s with %s\n", url, qel->remote_encoding);*/
+
   if (queue->tail)
     queue->tail->next = qel;
   queue->tail = qel;
@@ -132,6 +141,10 @@ url_dequeue (struct url_queue *queue,
   if (!queue->head)
     queue->tail = NULL;
 
+  set_remote_charset (qel->remote_encoding);
+  if (qel->remote_encoding)
+    xfree (qel->remote_encoding);
+
   *url = qel->url;
   *referer = qel->referer;
   *depth = qel->depth;
@@ -177,6 +190,7 @@ uerr_t
 retrieve_tree (const char *start_url)
 {
   uerr_t status = RETROK;
+  bool utf8_encode = false;
 
   /* The queue of URLs we need to load. */
   struct url_queue *queue;
@@ -186,7 +200,7 @@ retrieve_tree (const char *start_url)
   struct hash_table *blacklist;
 
   int up_error_code;
-  struct url *start_url_parsed = url_parse (start_url, &up_error_code);
+  struct url *start_url_parsed = url_parse (start_url, &up_error_code, &utf8_encode);
 
   if (!start_url_parsed)
     {
@@ -324,7 +338,7 @@ retrieve_tree (const char *start_url)
           if (children)
             {
               struct urlpos *child = children;
-              struct url *url_parsed = url_parsed = url_parse (url, NULL);
+              struct url *url_parsed = url_parsed = url_parse (url, NULL, &utf8_encode);
               char *referer_url = url;
               bool strip_auth = (url_parsed != NULL
                                  && url_parsed->user != NULL);
@@ -627,11 +641,12 @@ descend_redirect_p (const char *redirected, const char *original, int depth,
   struct url *orig_parsed, *new_parsed;
   struct urlpos *upos;
   bool success;
+  bool utf8_encode = false;
 
-  orig_parsed = url_parse (original, NULL);
+  orig_parsed = url_parse (original, NULL, &utf8_encode);
   assert (orig_parsed != NULL);
 
-  new_parsed = url_parse (redirected, NULL);
+  new_parsed = url_parse (redirected, NULL, &utf8_encode);
   assert (new_parsed != NULL);
 
   upos = xnew0 (struct urlpos);

src/retr.c

@@ -51,6 +51,7 @@ as that of the covered work.  */
 #include "hash.h"
 #include "convert.h"
 #include "ptimer.h"
+#include "iri.h"
 
 /* Total size of downloaded files.  Used to enforce quota.  */
 SUM_SIZE_INT total_downloaded_bytes;
@@ -612,6 +613,8 @@ retrieve_url (const char *origurl, char **file, char **newloc,
   char *saved_post_data = NULL;
   char *saved_post_file_name = NULL;
 
+  bool utf8_encoded = opt.enable_iri;
+
   /* If dt is NULL, use local storage.  */
   if (!dt)
     {
@@ -624,7 +627,8 @@ retrieve_url (const char *origurl, char **file, char **newloc,
   if (file)
     *file = NULL;
 
-  u = url_parse (url, &up_error_code);
+ second_try:
+  u = url_parse (url, &up_error_code, &utf8_encoded);
   if (!u)
     {
       logprintf (LOG_NOTQUIET, "%s: %s.\n", url, url_error (up_error_code));
@@ -632,6 +636,8 @@ retrieve_url (const char *origurl, char **file, char **newloc,
       return URLERROR;
     }
 
+  /*printf ("[Retrieving %s with %s (UTF-8=%d)\n", url, get_remote_charset (), utf8_encoded);*/
+
   if (!refurl)
     refurl = opt.referer;
 
@@ -645,8 +651,10 @@ retrieve_url (const char *origurl, char **file, char **newloc,
   proxy = getproxy (u);
   if (proxy)
     {
+      /* sXXXav : support IRI for proxy */
+      bool proxy_utf8_encode = false;
       /* Parse the proxy URL.  */
-      proxy_url = url_parse (proxy, &up_error_code);
+      proxy_url = url_parse (proxy, &up_error_code, &proxy_utf8_encode);
       if (!proxy_url)
         {
           logprintf (LOG_NOTQUIET, _("Error parsing proxy URL %s: %s.\n"),
@@ -721,8 +729,10 @@ retrieve_url (const char *origurl, char **file, char **newloc,
       xfree (mynewloc);
       mynewloc = construced_newloc;
 
+      utf8_encoded = opt.enable_iri;
+
       /* Now, see if this new location makes sense. */
-      newloc_parsed = url_parse (mynewloc, &up_error_code);
+      newloc_parsed = url_parse (mynewloc, &up_error_code, &utf8_encoded);
       if (!newloc_parsed)
         {
           logprintf (LOG_NOTQUIET, "%s: %s.\n", escnonprint_uri (mynewloc),
@@ -769,9 +779,15 @@ retrieve_url (const char *origurl, char **file, char **newloc,
       goto redirected;
     }
 
-  if (local_file)
+  /* Try to not encode in UTF-8 if fetching failed */
+  if (result != RETROK && utf8_encoded)
     {
-      if (*dt & RETROKF)
+      utf8_encoded = false;
+      /*printf ("[Fallbacking to non-utf8 for `%s'\n", url);*/
+      goto second_try;
+    }
+
+  if (local_file && *dt & RETROKF)
     {
       register_download (u->url, local_file);
       if (redirection_count && 0 != strcmp (origurl, u->url))
@@ -779,7 +795,6 @@ retrieve_url (const char *origurl, char **file, char **newloc,
       if (*dt & TEXTHTML)
         register_html (u->url, local_file);
     }
-    }
 
   if (file)
     *file = local_file ? local_file : NULL;
@@ -1021,8 +1036,8 @@ getproxy (struct url *u)
 bool
 url_uses_proxy (const char *url)
 {
-  bool ret;
-  struct url *u = url_parse (url, NULL);
+  bool ret, utf8_encode = false;
+  struct url *u = url_parse (url, NULL, &utf8_encode);
   if (!u)
     return false;
   ret = getproxy (u) != NULL;

src/url.c

@@ -641,7 +641,7 @@ static const char *parse_errors[] = {
    error, and if ERROR is not NULL, also set *ERROR to the appropriate
    error code. */
 struct url *
-url_parse (const char *url, int *error)
+url_parse (const char *url, int *error, bool *utf8_encode)
 {
   struct url *u;
   const char *p;
@@ -671,10 +671,13 @@ url_parse (const char *url, int *error)
       goto error;
     }
 
-  if (opt.enable_iri)
+  if (opt.enable_iri && *utf8_encode)
     {
+      const char *new;
       url_unescape ((char *) url);
-      url = locale_to_utf8(url);
+      *utf8_encode = remote_to_utf8 (url, &new);
+      if (*utf8_encode)
+        url = new;
     }
 
   url_encoded = reencode_escapes (url);
@@ -853,7 +856,7 @@ url_parse (const char *url, int *error)
 
   if (opt.enable_iri)
     {
-      char *new = idn_encode (u->host);
+      char *new = idn_encode (u->host, *utf8_encode);
       if (new)
         {
           xfree (u->host);

src/url.h

@@ -84,7 +84,7 @@ struct url
 
 char *url_escape (const char *);
 
-struct url *url_parse (const char *, int *);
+struct url *url_parse (const char *, int *, bool *);
 const char *url_error (int);
 char *url_full_path (const struct url *);
 void url_set_dir (struct url *, const char *);