[svn] Implemented new -K / --backup-converted / backup_converted = on option.

ChangeLog

@@ -1,3 +1,7 @@
+2000-02-18  Dan Harkless  <dan-wget@dilvish.speed.net>
+
+	* TODO: When -K is used with -N, check local X.orig against server X.
+
 1998-06-23  Dave Love  <d.love@dl.ac.uk>
 
 	* configure.in (exext): Define.

TODO

@@ -76,3 +76,6 @@ particular order.  Not all of them are user-visible changes.
 * Implement more HTTP/1.1 bells and whistles (ETag, Content-MD5 etc.)
 
 * Support SSL encryption through SSLeay or OpenSSL.
+
+* When -K is used with -N, check local file X.orig (if extant) against server 
+  file X.

doc/ChangeLog

@@ -1,3 +1,7 @@
+2000-02-18  Dan Harkless  <dan-wget@dilvish.speed.net>
+
+	* wget.texi (-K / --backup-converted): Documented this new option.
+
 1998-09-10  Hrvoje Niksic  <hniksic@srce.hr>
 
 	* wget.texi (HTTP Options): Warn against masquerading as Mozilla.

doc/wget.texi

@@ -832,6 +832,11 @@ Note that only at the end of the download can Wget know which links have
 been downloaded.  Because of that, much of the work done by @samp{-k}
 will be performed at the end of the downloads.
 
+@cindex backing up converted files
+@item -K
+@itemx --backup-converted
+When converting a file, back up the original version with a @samp{.orig} suffix.
+
 @item -m
 @itemx --mirror
 Turn on options suitable for mirroring.  This option turns on recursion
@@ -1511,6 +1516,10 @@ Enable/disable continuation of the retrieval, the same as @samp{-c}
 Enable/disable going to background, the same as @samp{-b} (which enables 
 it).
 
+@item backup_converted = on/off
+Enable/disable saving pre-converted files with the suffix @samp{.orig}
+-- the same as @samp{-K} (which enables it).
+
 @c @item backups = @var{number}
 @c #### Document me!
 @item base = @var{string}

src/ChangeLog

@@ -1,3 +1,16 @@
+2000-02-18  Dan Harkless  <dan-wget@dilvish.speed.net>
+
+	* init.c (backup_converted): Added this new option.
+
+	* main.c (-K / --backup-converted): Added this new option.
+
+	* options.h (backup_converted): Added this new option.
+
+	* url.c (convert_links): When backup_converted is specified, save
+	file X as X.orig before converting.
+
+	* url.h (urlpos): Fixed typo -- said "Rekative" instead of "Relative".
+
 1998-09-21  Hrvoje Niksic  <hniksic@srce.hr>
 
 	* version.c: Wget 1.5.3 is released.

src/init.c

@@ -84,6 +84,7 @@ static struct {
   { "addhostdir",	&opt.add_hostdir,	cmd_boolean },
   { "alwaysrest",	&opt.always_rest,	cmd_boolean }, /* deprecated */
   { "background",	&opt.background,	cmd_boolean },
+  { "backupconverted",	&opt.backup_converted,	cmd_boolean },
   { "backups",		&opt.backups,		cmd_number },
   { "base",		&opt.base_href,		cmd_string },
   { "cache",		&opt.proxy_cache,	cmd_boolean },

src/main.c

@@ -173,6 +173,7 @@ Recursive retrieval:\n\
   -l,  --level=NUMBER          maximum recursion depth (0 to unlimit).\n\
        --delete-after          delete downloaded files.\n\
   -k,  --convert-links         convert non-relative links to relative.\n\
+  -K,  --backup-converted      before converting file X, back up as X.orig.\n\
   -m,  --mirror                turn on options suitable for mirroring.\n\
   -nr, --dont-remove-listing   don\'t remove `.listing\' files.\n\
 \n"), _("\
@@ -202,6 +203,7 @@ main (int argc, char *const *argv)
     { "background", no_argument, NULL, 'b' },
     { "continue", no_argument, NULL, 'c' },
     { "convert-links", no_argument, NULL, 'k' },
+    { "backup-converted", no_argument, NULL, 'K' },
     { "debug", no_argument, NULL, 'd' },
     { "dont-remove-listing", no_argument, NULL, 21 },
     { "email-address", no_argument, NULL, 'E' }, /* undocumented (debug) */
@@ -286,7 +288,7 @@ main (int argc, char *const *argv)
   initialize ();
 
   while ((c = getopt_long (argc, argv, "\
-hVqvdksxmNWrHSLcFbEY:g:T:U:O:l:n:i:o:a:t:D:A:R:P:B:e:Q:X:I:w:",
+hVqvdkKsxmNWrHSLcFbEY:g:T:U:O:l:n:i:o:a:t:D:A:R:P:B:e:Q:X:I:w:",
 			   long_options, (int *)0)) != EOF)
     {
       switch (c)
@@ -369,6 +371,9 @@ hVqvdksxmNWrHSLcFbEY:g:T:U:O:l:n:i:o:a:t:D:A:R:P:B:e:Q:X:I:w:",
 	case 'k':
 	  setval ("convertlinks", "on");
 	  break;
+	case 'K':
+	  setval ("backupconverted", "on");
+	  break;
 	case 'L':
 	  setval ("relativeonly", "on");
 	  break;

src/options.h

@@ -113,7 +113,9 @@ struct options
 #endif /* DEBUG */
 
   int timestamping;		/* Whether to use time-stamping. */
-  int backups;			/* Are backups made? */
+
+  int backup_converted;		/* Do we save pre-converted files as *.orig? */
+  int backups;			/* Are numeric backups made? */
 
   char *useragent;		/* Naughty User-Agent, which can be
 				   set to something other than

src/url.c

@@ -1366,9 +1366,10 @@ no_proxy_match (const char *host, const char **no_proxy)
 void
 convert_links (const char *file, urlpos *l)
 {
-  FILE *fp;
-  char *buf, *p, *p2;
-  long size;
+  FILE           *fp;
+  char           *buf, *p, *p2;
+  long           size;
+  static slist*  converted_files = NULL;
 
   logprintf (LOG_VERBOSE, _("Converting %s... "), file);
   /* Read from the file....  */
@@ -1382,6 +1383,54 @@ convert_links (const char *file, urlpos *l)
   /* ...to a buffer.  */
   load_file (fp, &buf, &size);
   fclose (fp);
+  if (opt.backup_converted)
+    /* Rather than just writing over the original .html file with the converted
+       version, save the former to *.orig. */
+    {
+      /* Construct the backup filename as the original name plus ".orig". */
+      size_t filename_len = strlen(file);
+      char*  filename_plus_orig_suffix = malloc(filename_len + sizeof(".orig"));
+      int    already_wrote_backup_file = 0;
+      slist* converted_file_ptr;
+
+      strcpy(filename_plus_orig_suffix, file);
+      strcpy(filename_plus_orig_suffix + filename_len, ".orig");
+
+      /* We can get called twice on the same URL thanks to the
+	 convert_all_links() call in main().  If we write the .orig file each
+	 time in such a case, it'll end up containing the first-pass conversion,
+	 not the original file. */
+      converted_file_ptr = converted_files;
+      while (converted_file_ptr != NULL)
+	if (strcmp(converted_file_ptr->string, file) == 0)
+	  {
+	    already_wrote_backup_file = 1;
+	    break;
+	  }
+	else
+	  converted_file_ptr = converted_file_ptr->next;
+
+      if (!already_wrote_backup_file)
+	{
+	  /* Rename <file> to <file>.orig before former gets written over. */
+	  if (rename(file, filename_plus_orig_suffix) != 0)
+	    logprintf (LOG_NOTQUIET, _("Cannot back up %s as %s: %s\n"),
+		       file, filename_plus_orig_suffix, strerror (errno));
+
+	  /* Remember that we've already written a .orig backup for this file.
+	     Note that we never free this memory since we need it till the
+	     convert_all_links() call, which is one of the last things the
+	     program does before terminating.  BTW, I'm not sure if it would be
+	     safe to just set converted_file_ptr->string to file below, rather
+	     than making a copy of the string... */
+	  converted_file_ptr = malloc(sizeof(slist));
+	  converted_file_ptr->string = strdup(file);
+	  converted_file_ptr->next = converted_files;
+	  converted_files = converted_file_ptr;
+	}
+
+      free(filename_plus_orig_suffix);
+    }
   /* Now open the file for writing.  */
   fp = fopen (file, "wb");
   if (!fp)

src/url.h

@@ -58,7 +58,7 @@ typedef struct _urlpos
   char *url;                   /* URL */
   char *local_name;            /* Local file to which it was saved */
   enum uflags flags;           /* Various flags */
-  int pos, size;               /* Rekative position in the buffer */
+  int pos, size;               /* Relative position in the buffer */
   struct _urlpos *next;        /* Next struct in list */
 } urlpos;