We need <sys/time.h> for gettimeofday(), not <time.h>.
[privoxy.git] / cgiedit.c
index c50ad20..2fb01ee 100644 (file)
--- a/cgiedit.c
+++ b/cgiedit.c
@@ -1,4 +1,4 @@
-const char cgiedit_rcs[] = "$Id: cgiedit.c,v 1.44 2006/12/09 13:49:16 fabiankeil Exp $";
+const char cgiedit_rcs[] = "$Id: cgiedit.c,v 1.50 2007/03/29 11:40:34 fabiankeil Exp $";
 /*********************************************************************
  *
  * File        :  $Source: /cvsroot/ijbswa/current/cgiedit.c,v $
@@ -15,7 +15,7 @@ const char cgiedit_rcs[] = "$Id: cgiedit.c,v 1.44 2006/12/09 13:49:16 fabiankeil
  *
  *                Stick to the short names in this file for consistency.
  *
- * Copyright   :  Written by and Copyright (C) 2001 the SourceForge
+ * Copyright   :  Written by and Copyright (C) 2001-2007 the SourceForge
  *                Privoxy team. http://www.privoxy.org/
  *
  *                Based on the Internet Junkbuster originally written
@@ -42,6 +42,30 @@ const char cgiedit_rcs[] = "$Id: cgiedit.c,v 1.44 2006/12/09 13:49:16 fabiankeil
  *
  * Revisions   :
  *    $Log: cgiedit.c,v $
+ *    Revision 1.50  2007/03/29 11:40:34  fabiankeil
+ *    Divide @filter-params@ into @client-header-filter-params@
+ *    @content-filter-params@ and @server-header-filter-params@.
+ *
+ *    Revision 1.49  2007/03/20 15:16:34  fabiankeil
+ *    Use dedicated header filter actions instead of abusing "filter".
+ *    Replace "filter-client-headers" and "filter-client-headers"
+ *    with "server-header-filter" and "client-header-filter".
+ *
+ *    Revision 1.48  2007/02/13 14:35:25  fabiankeil
+ *    Replace hash escaping code to prevent
+ *    crashes, memory and file corruption.
+ *
+ *    Revision 1.47  2006/12/28 18:04:25  fabiankeil
+ *    Fixed gcc43 conversion warnings.
+ *
+ *    Revision 1.46  2006/12/27 18:44:52  fabiankeil
+ *    Stop shadowing string.h's index().
+ *
+ *    Revision 1.45  2006/12/21 12:57:48  fabiankeil
+ *    Add config option "split-large-forms"
+ *    to work around the browser bug reported
+ *    in BR #1570678.
+ *
  *    Revision 1.44  2006/12/09 13:49:16  fabiankeil
  *    Fix configure option --disable-toggle.
  *    Thanks to Peter Thoenen for reporting this.
@@ -450,8 +474,7 @@ struct editable_file
 {
    struct file_line * lines;  /**< The contents of the file.  A linked list of lines. */
    const char * filename;     /**< Full pathname - e.g. "/etc/privoxy/wibble.action". */
-   const char * identifier;   /**< Filename stub - e.g. "wibble".  Use for CGI param. */
-                              /**< Pre-encoded with url_encode() for ease of use. */
+   int identifier;            /**< The file name's position in csp->config->actions_file[]. */
    const char * version_str;  /**< Last modification time, as a string.  For CGI param. */
                               /**< Can be used in URL without using url_param(). */
    unsigned version;          /**< Last modification time - prevents chaos with
@@ -474,7 +497,6 @@ struct editable_file
 jb_err edit_read_file(struct client_state *csp,
                       const struct map *parameters,
                       int require_version,
-                      const char *suffix,
                       struct editable_file **pfile);
 jb_err edit_write_file(struct editable_file * file);
 void   edit_free_file(struct editable_file * file);
@@ -510,13 +532,6 @@ static int match_actions_file_header_line(const char * line, const char * name);
 static jb_err split_line_on_equals(const char * line, char ** pname, char ** pvalue);
 
 /* Internal parameter parsing functions */
-static jb_err get_file_name_param(struct client_state *csp,
-                                  const struct map *parameters,
-                                  const char *param_name,
-                                  const char *suffix,
-                                  char **pfilename,
-                                  const char **pparam);
-
 static jb_err get_url_spec_param(struct client_state *csp,
                                  const struct map *parameters,
                                  const char *name,
@@ -554,6 +569,10 @@ static char *section_target(const unsigned sectionid);
  *                allocated string of the form #l<n>, for use in link
  *                targets.
  *
+ *                XXX: The hash should be moved into the templates
+ *                to make this function more generic and render
+ *                stringify() obsolete.
+ *
  * Parameters  :
  *          1  :  sectionid = start line number of section
  *
@@ -571,6 +590,27 @@ static char *section_target(const unsigned sectionid)
 }
 
 
+/*********************************************************************
+ *
+ * Function    :  stringify
+ *
+ * Description :  Convert a number into a dynamically allocated string.
+ *
+ * Parameters  :
+ *          1  :  number = The number to convert.
+ *
+ * Returns     :  String with link target, or NULL if out of memory
+ *
+ *********************************************************************/
+static char *stringify(const int number)
+{
+   char buf[6];
+
+   snprintf(buf, sizeof(buf), "%i", number);
+   return strdup(buf);
+}
+
+
 /*********************************************************************
  *
  * Function    :  map_copy_parameter_html
@@ -668,6 +708,7 @@ static jb_err map_copy_parameter_url(struct map *out,
 }
 #endif /* 0 - unused function */
 
+
 /*********************************************************************
  *
  * Function    :  cgi_edit_actions_url_form
@@ -681,7 +722,7 @@ static jb_err map_copy_parameter_url(struct map *out,
  *          3  :  parameters = map of cgi parameters
  *
  * CGI Parameters
- *           f : (filename) Identifies the file to edit
+ *           i : (action index) Identifies the file to edit
  *           v : (version) File's last-modified time
  *           p : (pattern) Line number of pattern to edit
  *
@@ -752,7 +793,7 @@ jb_err cgi_edit_actions_url_form(struct client_state *csp,
       return JB_ERR_MEMORY;
    }
 
-   err = map(exports, "f", 1, file->identifier, 1);
+   err = map(exports, "f", 1, stringify(file->identifier), 0);
    if (!err) err = map(exports, "v", 1, file->version_str, 1);
    if (!err) err = map(exports, "p", 1, url_encode(lookup(parameters, "p")), 0);
    if (!err) err = map(exports, "u", 1, html_encode(cur_line->unprocessed), 0);
@@ -841,7 +882,7 @@ jb_err cgi_edit_actions_add_url_form(struct client_state *csp,
  *          3  :  parameters = map of cgi parameters
  *
  * CGI Parameters :
- *           f : (filename) Identifies the file to edit
+ *           f : (number)  The action file identifier.
  *           v : (version) File's last-modified time
  *           p : (pattern) Line number of pattern to edit
  *
@@ -912,11 +953,12 @@ jb_err cgi_edit_actions_remove_url_form(struct client_state *csp,
       return JB_ERR_MEMORY;
    }
 
-   err = map(exports, "f", 1, file->identifier, 1);
+   err = map(exports, "f", 1, stringify(file->identifier), 0);
    if (!err) err = map(exports, "v", 1, file->version_str, 1);
    if (!err) err = map(exports, "p", 1, url_encode(lookup(parameters, "p")), 0);
    if (!err) err = map(exports, "u", 1, html_encode(cur_line->unprocessed), 0);
    if (!err) err = map(exports, "jumptarget", 1, section_target(section_start_line_number), 0);
+   if (!err) err = map(exports, "actions-file", 1, html_encode(file->filename), 0);
 
    edit_free_file(file);
 
@@ -990,7 +1032,7 @@ jb_err edit_write_file(struct editable_file * file)
             {
                /* Must quote '#' characters */
                int numhash = 0;
-               int len;
+               size_t len;
                char * src;
                char * dest;
                char * str;
@@ -1005,29 +1047,44 @@ jb_err edit_write_file(struct editable_file * file)
                assert(numhash > 0);
 
                /* Allocate new memory for string */
-               len = strlen(cur_line->unprocessed);
-               if (NULL == (str = malloc((size_t) len + 1 + numhash)))
+               len = strlen(cur_line->unprocessed) + (size_t)numhash;
+               if (NULL == (str = malloc(len + 1)))
                {
                   /* Uh oh, just trashed file! */
                   fclose(fp);
                   return JB_ERR_MEMORY;
                }
 
-               /* Loop through string from end */
-               src  = cur_line->unprocessed + len;
-               dest = str + len + numhash;
-               for ( ; len >= 0; len--)
+               /* Copy string but quote hashes */
+               src  = cur_line->unprocessed;
+               dest = str;
+               while (*src)
                {
-                  if ((*dest-- = *src--) == '#')
+                  if (*src == '#')
                   {
-                     *dest-- = '\\';
+                     *dest++ = '\\';
                      numhash--;
                      assert(numhash >= 0);
                   }
+                  *dest++ = *src++;
                }
+               *dest = '\0';
+
                assert(numhash == 0);
-               assert(src  + 1 == cur_line->unprocessed);
-               assert(dest + 1 == str);
+               assert(strlen(str) == len);
+               assert(str == dest - len);
+               assert(src - len <= cur_line->unprocessed);
+
+               if ((strlen(str) != len) || (numhash != 0))
+               {
+                  /*
+                   * Escaping didn't work as expected, go spread the news.
+                   * Only reached in non-debugging builds.
+                   */
+                  log_error(LOG_LEVEL_ERROR,
+                     "Looks like hash escaping failed. %s might be corrupted now.",
+                     file->filename);
+               }
 
                if (fputs(str, fp) < 0)
                {
@@ -1110,8 +1167,6 @@ void edit_free_file(struct editable_file * file)
    }
 
    edit_free_file_lines(file->lines);
-   freez(file->filename);
-   freez(file->identifier);
    freez(file->version_str);
    file->version = 0;
    file->parse_error_text = NULL; /* Statically allocated */
@@ -1288,7 +1343,7 @@ static jb_err split_line_on_equals(const char * line, char ** pname, char ** pva
       name_end--;
    }
 
-   name_len = name_end - line + 1; /* Length excluding \0 */
+   name_len = (size_t)(name_end - line) + 1; /* Length excluding \0 */
    if (NULL == (*pname = (char *) malloc(name_len + 1)))
    {
       return JB_ERR_MEMORY;
@@ -1706,13 +1761,11 @@ jb_err edit_read_file_lines(FILE *fp, struct file_line ** pfile, int *newline)
  *          1  :  csp = Current client state (buffers, headers, etc...)
  *          2  :  parameters = map of cgi parameters.
  *          3  :  require_version = true to check "ver" parameter.
- *          4  :  suffix = File extension, e.g. ".action".
- *          5  :  pfile = Destination for the file.  Will be set
+ *          4  :  pfile = Destination for the file.  Will be set
  *                        to NULL on error.
  *
  * CGI Parameters :
- *    filename :  The name of the file to read, without the
- *                path or ".action" extension.
+ *           f :  The action file identifier.
  *         ver :  (Only if require_version is nonzero)
  *                Timestamp of the actions file.  If wrong, this
  *                function fails with JB_ERR_MODIFIED.
@@ -1731,19 +1784,18 @@ jb_err edit_read_file_lines(FILE *fp, struct file_line ** pfile, int *newline)
 jb_err edit_read_file(struct client_state *csp,
                       const struct map *parameters,
                       int require_version,
-                      const char *suffix,
                       struct editable_file **pfile)
 {
    struct file_line * lines;
    FILE * fp;
    jb_err err;
-   char * filename;
-   const char * identifier;
+   const char * filename = NULL;
    struct editable_file * file;
    unsigned version = 0;
    struct stat statbuf[1];
    char version_buf[22];
    int newline = NEWLINE_UNKNOWN;
+   int i;
 
    assert(csp);
    assert(parameters);
@@ -1751,17 +1803,24 @@ jb_err edit_read_file(struct client_state *csp,
 
    *pfile = NULL;
 
-   err = get_file_name_param(csp, parameters, "f", suffix,
-                             &filename, &identifier);
-   if (err)
+   if ((JB_ERR_OK == get_number_param(csp, parameters, "f", &i))
+      && (i < MAX_AF_FILES) && (NULL != csp->config->actions_file[i]))
    {
-      return err;
+      /*
+       * i is guaranteed to be non-negative because
+       * get_number_param returned JB_ERR_OK.
+       *
+       * XXX: This comment wouldn't be necessary if
+       * get_number_param's fourth parameter would simply
+       * be changed to unsigned. I don't see the point of
+       * overloading its meaning to signal problems.
+       */
+      filename = csp->config->actions_file[i];
    }
 
-   if (stat(filename, statbuf) < 0)
+   if (filename == NULL || stat(filename, statbuf) < 0)
    {
       /* Error, probably file not found. */
-      free(filename);
       return JB_ERR_FILE;
    }
    version = (unsigned) statbuf->st_mtime;
@@ -1772,7 +1831,6 @@ jb_err edit_read_file(struct client_state *csp,
       err = get_number_param(csp, parameters, "v", &specified_version);
       if (err)
       {
-         free(filename);
          return err;
       }
 
@@ -1784,7 +1842,6 @@ jb_err edit_read_file(struct client_state *csp,
 
    if (NULL == (fp = fopen(filename,"rb")))
    {
-      free(filename);
       return JB_ERR_FILE;
    }
 
@@ -1794,14 +1851,12 @@ jb_err edit_read_file(struct client_state *csp,
 
    if (err)
    {
-      free(filename);
       return err;
    }
 
    file = (struct editable_file *) zalloc(sizeof(*file));
    if (err)
    {
-      free(filename);
       edit_free_file_lines(lines);
       return err;
    }
@@ -1810,13 +1865,7 @@ jb_err edit_read_file(struct client_state *csp,
    file->newline = newline;
    file->filename = filename;
    file->version = version;
-   file->identifier = url_encode(identifier);
-
-   if (file->identifier == NULL)
-   {
-      edit_free_file(file);
-      return JB_ERR_MEMORY;
-   }
+   file->identifier = i;
 
    /* Correct file->version_str */
    freez(file->version_str);
@@ -1856,8 +1905,7 @@ jb_err edit_read_file(struct client_state *csp,
  *                        to NULL on error.
  *
  * CGI Parameters :
- *    filename :  The name of the actions file to read, without the
- *                path or ".action" extension.
+ *           f :  The actions file identifier.
  *         ver :  (Only if require_version is nonzero)
  *                Timestamp of the actions file.  If wrong, this
  *                function fails with JB_ERR_MODIFIED.
@@ -1887,7 +1935,7 @@ jb_err edit_read_actions_file(struct client_state *csp,
 
    *pfile = NULL;
 
-   err = edit_read_file(csp, parameters, require_version, ".action", &file);
+   err = edit_read_file(csp, parameters, require_version, &file);
    if (err)
    {
       /* Try to handle if possible */
@@ -1934,6 +1982,10 @@ jb_err edit_read_actions_file(struct client_state *csp,
 }
 
 
+#if 0
+/*
+ * Currently not needed, but may become useful again in the future.
+ */
 /*********************************************************************
  *
  * Function    :  get_file_name_param
@@ -1984,7 +2036,7 @@ static jb_err get_file_name_param(struct client_state *csp,
    char *name;
    char *fullpath;
    char ch;
-   int len;
+   size_t len;
 
    assert(csp);
    assert(parameters);
@@ -2048,6 +2100,7 @@ static jb_err get_file_name_param(struct client_state *csp,
 
    return JB_ERR_OK;
 }
+#endif /*0*/
 
 
 /*********************************************************************
@@ -2241,7 +2294,7 @@ static jb_err map_radio(struct map * exports,
       }
    }
 
-   *p = value;
+   *p = (char)value;
    return map(exports, buf, 0, "checked", 1);
 }
 
@@ -2326,7 +2379,7 @@ jb_err cgi_error_parse(struct client_state *csp,
       return JB_ERR_MEMORY;
    }
 
-   err = map(exports, "f", 1, file->identifier, 1);
+   err = map(exports, "f", 1, stringify(file->identifier), 0);
    if (!err) err = map(exports, "parse-error", 1, html_encode(file->parse_error_text), 0);
 
    cur_line = file->parse_error;
@@ -2392,7 +2445,7 @@ jb_err cgi_error_file(struct client_state *csp,
 
 /*********************************************************************
  *
- * Function    :  cgi_error_file
+ * Function    :  cgi_error_file_read_only
  *
  * Description :  CGI function that is called when a file cannot be
  *                opened for writing by the CGI editor.
@@ -2660,13 +2713,14 @@ jb_err cgi_edit_actions_list(struct client_state *csp,
 
    /* Set up global exports */
 
-   if (!err) err = map(exports, "f", 1, file->identifier, 1);
+   if (!err) err = map(exports, "actions-file", 1, html_encode(file->filename), 0);
+   if (!err) err = map(exports, "f", 1, stringify(file->identifier), 0);
    if (!err) err = map(exports, "v", 1, file->version_str, 1);
 
    /* Discourage private additions to default.action */
 
    if (!err) err = map_conditional(exports, "default-action",
-                                   (strcmp("default", lookup(parameters, "f")) == 0));
+                                   (strstr("default.action", file->filename) != NULL));
    if (err)
    {
       edit_free_file(file);
@@ -3027,7 +3081,7 @@ jb_err cgi_edit_actions_for_url(struct client_state *csp,
       return JB_ERR_MEMORY;
    }
 
-   err = map(exports, "f", 1, file->identifier, 1);
+   err = map(exports, "f", 1, stringify(file->identifier), 0);
    if (!err) err = map(exports, "v", 1, file->version_str, 1);
    if (!err) err = map(exports, "s", 1, url_encode(lookup(parameters, "s")), 0);
 
@@ -3080,13 +3134,19 @@ jb_err cgi_edit_actions_for_url(struct client_state *csp,
    }
 
    if (0 == have_filters)
+   {
       err = map(exports, "filter-params", 1, "", 1);
+   }
    else
    {
-      /* We have some entries in the filter list */
-      char * result;
-      int index = 0;
-      char * filter_template;
+      /*
+       * List available filters and their settings.
+       */
+      char *content_filter_params;
+      char *server_header_filter_params;
+      char *client_header_filter_params;
+      char *filter_template;
+      int filter_identifier = 0;
 
       err = template_load(csp, &filter_template, "edit-actions-for-url-filter", 0);
       if (err)
@@ -3102,7 +3162,9 @@ jb_err cgi_edit_actions_for_url(struct client_state *csp,
 
       err = template_fill(&filter_template, exports);
 
-      result = strdup("");
+      content_filter_params = strdup("");
+      server_header_filter_params = strdup("");
+      client_header_filter_params = strdup("");
 
       for (i = 0; i < MAX_AF_FILES; i++)
       {
@@ -3112,12 +3174,49 @@ jb_err cgi_edit_actions_for_url(struct client_state *csp,
             for (;(!err) && (filter_group != NULL); filter_group = filter_group->next)
             {
                char current_mode = 'x';
+               char number[20];
+               int multi_action_index = 0;
                struct list_entry *filter_name;
-               char * this_line;
                struct map *line_exports;
-               char number[20];
+               char *this_line;
+               char *filter_type;
+               char *abbr_filter_type;
+               char *anchor;
+               char **current_params;
+
+               switch (filter_group->type)
+               {
+                  case FT_CONTENT_FILTER:
+                     /* XXX: Should we call it content-filter instead? */
+                     filter_type = "filter"; 
+                     abbr_filter_type = "F";
+                     multi_action_index = ACTION_MULTI_FILTER;
+                     anchor = "FILTER";
+                     current_params = &content_filter_params;
+                     break;
+                  case FT_SERVER_HEADER_FILTER:
+                     filter_type = "server-header-filter"; 
+                     abbr_filter_type = "S"; 
+                     multi_action_index = ACTION_MULTI_SERVER_HEADER_FILTER;
+                     current_params = &server_header_filter_params;
+                     anchor = "SERVER-HEADER-FILTER"; /* XXX: no documentation available yet */
+                     break;
+                  case FT_CLIENT_HEADER_FILTER:
+                     filter_type = "client-header-filter"; 
+                     abbr_filter_type = "C"; 
+                     multi_action_index = ACTION_MULTI_CLIENT_HEADER_FILTER;
+                     current_params = &client_header_filter_params;
+                     anchor = "CLIENT-HEADER-FILTER"; /* XXX: no documentation available yet */
+                     break;
+                  default:
+                     log_error(LOG_LEVEL_FATAL,
+                        "cgi_edit_actions_for_url: Unknown filter type: %u for filter %s.",
+                        filter_group->type, filter_group->name);
+                     /* Not reached. */
+               }
+               assert(multi_action_index);
 
-               filter_name = cur_line->data.action->multi_add[ACTION_MULTI_FILTER]->first;
+               filter_name = cur_line->data.action->multi_add[multi_action_index]->first;
                while ((filter_name != NULL)
                    && (0 != strcmp(filter_group->name, filter_name->str)))
                {
@@ -3130,7 +3229,7 @@ jb_err cgi_edit_actions_for_url(struct client_state *csp,
                }
                else
                {
-                  filter_name = cur_line->data.action->multi_remove[ACTION_MULTI_FILTER]->first;
+                  filter_name = cur_line->data.action->multi_remove[multi_action_index]->first;
                   while ((filter_name != NULL)
                       && (0 != strcmp(filter_group->name, filter_name->str)))
                   {
@@ -3143,14 +3242,14 @@ jb_err cgi_edit_actions_for_url(struct client_state *csp,
                }
 
                /* Generate a unique serial number */
-               snprintf(number, sizeof(number), "%x", index++);
+               snprintf(number, sizeof(number), "%x", filter_identifier++);
                number[sizeof(number) - 1] = '\0';
 
                line_exports = new_map();
                if (line_exports == NULL)
                {
                   err = JB_ERR_MEMORY;
-                  freez(result);
+                  freez(*current_params); /* XXX: really necessary? */
                }
                else
                {
@@ -3158,6 +3257,9 @@ jb_err cgi_edit_actions_for_url(struct client_state *csp,
                   if (!err) err = map(line_exports, "name",  1, filter_group->name, 1);
                   if (!err) err = map(line_exports, "description",  1, filter_group->description, 1);
                   if (!err) err = map_radio(line_exports, "this-filter", "ynx", current_mode);
+                  if (!err) err = map(line_exports, "filter-type", 1, filter_type, 1);
+                  if (!err) err = map(line_exports, "abbr-filter-type", 1, abbr_filter_type, 1);
+                  if (!err) err = map(line_exports, "anchor", 1, anchor, 1);
 
                   this_line = NULL;
                   if (!err)
@@ -3166,7 +3268,7 @@ jb_err cgi_edit_actions_for_url(struct client_state *csp,
                      if (this_line == NULL) err = JB_ERR_MEMORY;
                   }
                   if (!err) err = template_fill(&this_line, line_exports);
-                  string_join(&result, this_line);
+                  string_join(current_params, this_line);
 
                   free_map(line_exports);
                }
@@ -3175,13 +3277,14 @@ jb_err cgi_edit_actions_for_url(struct client_state *csp,
       }
       freez(filter_template);
 
-      if (!err)
-      {
-         err = map(exports, "filter-params", 1, result, 0);
-      }
-      else
+      if (!err) err = map(exports, "content-filter-params", 1, content_filter_params, 0);
+      if (!err) err = map(exports, "server-header-filter-params", 1, server_header_filter_params, 0);
+      if (!err) err = map(exports, "client-header-filter-params", 1, client_header_filter_params, 0);
+      if (err)
       {
-         freez(result);
+         freez(content_filter_params);
+         freez(server_header_filter_params);
+         freez(client_header_filter_params);
       }
    }
 
@@ -3232,7 +3335,7 @@ jb_err cgi_edit_actions_submit(struct client_state *csp,
    unsigned line_number;
    char target[1024];
    jb_err err;
-   int index;
+   int filter_identifier;
    const char * action_set_name;
    char ch;
    struct file_list * fl;
@@ -3276,9 +3379,9 @@ jb_err cgi_edit_actions_submit(struct client_state *csp,
    get_string_param(parameters, "p", &action_set_name);
    if (action_set_name != NULL)
    {
-      for (index = 0; index < MAX_AF_FILES; index++)
+      for (filter_identifier = 0; filter_identifier < MAX_AF_FILES; filter_identifier++)
       {
-         if (((fl = csp->actions_list[index]) != NULL) && ((b = fl->f) != NULL))
+         if (((fl = csp->actions_list[filter_identifier]) != NULL) && ((b = fl->f) != NULL))
          {
             for (b = b->next; NULL != b; b = b->next)
             {
@@ -3319,18 +3422,29 @@ jb_err cgi_edit_actions_submit(struct client_state *csp,
       cur_line->data.action->multi_remove_all[ACTION_MULTI_FILTER] = 0;
    }
 
-   for (index = 0; !err; index++)
+   for (filter_identifier = 0; !err; filter_identifier++)
    {
       char key_value[30];
       char key_name[30];
+      char key_type[30];
       const char *name;
-      char value;
+      char value; /*
+                   * Filter state. Valid states are: 'Y' (active),
+                   * 'N' (inactive) and 'X' (no change).
+                   * XXX: bad name.
+                   */
+      char type;  /*
+                   * Abbreviated filter type. Valid types are: 'F' (content filter),
+                   * 'S' (server-header filter) and 'C' (client-header filter).
+                   */
+      int multi_action_index = 0;
 
       /* Generate the keys */
-      snprintf(key_value, sizeof(key_value), "filter_r%x", index);
-      key_value[sizeof(key_value) - 1] = '\0';
-      snprintf(key_name, sizeof(key_name), "filter_n%x", index);
-      key_name[sizeof(key_name) - 1] = '\0';
+      snprintf(key_value, sizeof(key_value), "filter_r%x", filter_identifier);
+      key_value[sizeof(key_value) - 1] = '\0'; /* XXX: Why? */
+      snprintf(key_name, sizeof(key_name), "filter_n%x", filter_identifier);
+      key_name[sizeof(key_name) - 1] = '\0'; /* XXX: Why? */
+      snprintf(key_type, sizeof(key_type), "filter_t%x", filter_identifier);
 
       err = get_string_param(parameters, key_name, &name);
       if (err) break;
@@ -3341,26 +3455,45 @@ jb_err cgi_edit_actions_submit(struct client_state *csp,
          break;
       }
 
+      type = get_char_param(parameters, key_type);
+      switch (type)
+      {
+         case 'F':
+            multi_action_index = ACTION_MULTI_FILTER;
+            break;
+         case 'S':
+            multi_action_index = ACTION_MULTI_SERVER_HEADER_FILTER;
+            break;
+         case 'C':
+            multi_action_index = ACTION_MULTI_CLIENT_HEADER_FILTER;
+            break;
+         default:
+            log_error(LOG_LEVEL_ERROR,
+               "Unknown filter type: %c for filter %s. Filter ignored.", type, name);
+            continue;
+      }
+      assert(multi_action_index);
+
       value = get_char_param(parameters, key_value);
       if (value == 'Y')
       {
-         list_remove_item(cur_line->data.action->multi_add[ACTION_MULTI_FILTER], name);
-         if (!err) err = enlist(cur_line->data.action->multi_add[ACTION_MULTI_FILTER], name);
-         list_remove_item(cur_line->data.action->multi_remove[ACTION_MULTI_FILTER], name);
+         list_remove_item(cur_line->data.action->multi_add[multi_action_index], name);
+         if (!err) err = enlist(cur_line->data.action->multi_add[multi_action_index], name);
+         list_remove_item(cur_line->data.action->multi_remove[multi_action_index], name);
       }
       else if (value == 'N')
       {
-         list_remove_item(cur_line->data.action->multi_add[ACTION_MULTI_FILTER], name);
-         if (!cur_line->data.action->multi_remove_all[ACTION_MULTI_FILTER])
+         list_remove_item(cur_line->data.action->multi_add[multi_action_index], name);
+         if (!cur_line->data.action->multi_remove_all[multi_action_index])
          {
-            list_remove_item(cur_line->data.action->multi_remove[ACTION_MULTI_FILTER], name);
-            if (!err) err = enlist(cur_line->data.action->multi_remove[ACTION_MULTI_FILTER], name);
+            list_remove_item(cur_line->data.action->multi_remove[multi_action_index], name);
+            if (!err) err = enlist(cur_line->data.action->multi_remove[multi_action_index], name);
          }
       }
       else if (value == 'X')
       {
-         list_remove_item(cur_line->data.action->multi_add[ACTION_MULTI_FILTER], name);
-         list_remove_item(cur_line->data.action->multi_remove[ACTION_MULTI_FILTER], name);
+         list_remove_item(cur_line->data.action->multi_add[multi_action_index], name);
+         list_remove_item(cur_line->data.action->multi_remove[multi_action_index], name);
       }
    }
 
@@ -3412,13 +3545,13 @@ jb_err cgi_edit_actions_submit(struct client_state *csp,
       if (err == JB_ERR_FILE)
       {
          /* Read-only file. */
-         err = cgi_error_file_read_only(csp, rsp, file->identifier);
+         err = cgi_error_file_read_only(csp, rsp, file->filename);
       }
       edit_free_file(file);
       return err;
    }
 
-   snprintf(target, 1024, CGI_PREFIX "edit-actions-list?foo=%lu&f=%s#l%d",
+   snprintf(target, sizeof(target), CGI_PREFIX "edit-actions-list?foo=%lu&f=%i#l%d",
             (long) time(NULL), file->identifier, sectionid);
 
    edit_free_file(file);
@@ -3533,13 +3666,13 @@ jb_err cgi_edit_actions_url(struct client_state *csp,
       if (err == JB_ERR_FILE)
       {
          /* Read-only file. */
-         err = cgi_error_file_read_only(csp, rsp, file->identifier);
+         err = cgi_error_file_read_only(csp, rsp, file->filename);
       }
       edit_free_file(file);
       return err;
    }
 
-   snprintf(target, 1024, CGI_PREFIX "edit-actions-list?foo=%lu&f=%s#l%d",
+   snprintf(target, sizeof(target), CGI_PREFIX "edit-actions-list?foo=%lu&f=%i#l%d",
             (long) time(NULL), file->identifier, section_start_line_number);
 
    edit_free_file(file);
@@ -3662,13 +3795,13 @@ jb_err cgi_edit_actions_add_url(struct client_state *csp,
       if (err == JB_ERR_FILE)
       {
          /* Read-only file. */
-         err = cgi_error_file_read_only(csp, rsp, file->identifier);
+         err = cgi_error_file_read_only(csp, rsp, file->filename);
       }
       edit_free_file(file);
       return err;
    }
 
-   snprintf(target, 1024, CGI_PREFIX "edit-actions-list?foo=%lu&f=%s#l%d",
+   snprintf(target, sizeof(target), CGI_PREFIX "edit-actions-list?foo=%lu&f=%i#l%d",
             (long) time(NULL), file->identifier, sectionid);
 
    edit_free_file(file);
@@ -3773,13 +3906,13 @@ jb_err cgi_edit_actions_remove_url(struct client_state *csp,
       if (err == JB_ERR_FILE)
       {
          /* Read-only file. */
-         err = cgi_error_file_read_only(csp, rsp, file->identifier);
+         err = cgi_error_file_read_only(csp, rsp, file->filename);
       }
       edit_free_file(file);
       return err;
    }
 
-   snprintf(target, 1024, CGI_PREFIX "edit-actions-list?foo=%lu&f=%s#l%d",
+   snprintf(target, sizeof(target), CGI_PREFIX "edit-actions-list?foo=%lu&f=%i#l%d",
             (long) time(NULL), file->identifier, section_start_line_number);
 
    edit_free_file(file);
@@ -3895,13 +4028,13 @@ jb_err cgi_edit_actions_section_remove(struct client_state *csp,
       if (err == JB_ERR_FILE)
       {
          /* Read-only file. */
-         err = cgi_error_file_read_only(csp, rsp, file->identifier);
+         err = cgi_error_file_read_only(csp, rsp, file->filename);
       }
       edit_free_file(file);
       return err;
    }
 
-   snprintf(target, 1024, CGI_PREFIX "edit-actions-list?foo=%lu&f=%s",
+   snprintf(target, sizeof(target), CGI_PREFIX "edit-actions-list?foo=%lu&f=%i",
             (long) time(NULL), file->identifier);
 
    edit_free_file(file);
@@ -4064,13 +4197,13 @@ jb_err cgi_edit_actions_section_add(struct client_state *csp,
       if (err == JB_ERR_FILE)
       {
          /* Read-only file. */
-         err = cgi_error_file_read_only(csp, rsp, file->identifier);
+         err = cgi_error_file_read_only(csp, rsp, file->filename);
       }
       edit_free_file(file);
       return err;
    }
 
-   snprintf(target, 1024, CGI_PREFIX "edit-actions-list?foo=%lu&f=%s",
+   snprintf(target, sizeof(target), CGI_PREFIX "edit-actions-list?foo=%lu&f=%i",
             (long) time(NULL), file->identifier);
 
    edit_free_file(file);
@@ -4252,14 +4385,14 @@ jb_err cgi_edit_actions_section_swap(struct client_state *csp,
          if (err == JB_ERR_FILE)
          {
             /* Read-only file. */
-            err = cgi_error_file_read_only(csp, rsp, file->identifier);
+            err = cgi_error_file_read_only(csp, rsp, file->filename);
          }
          edit_free_file(file);
          return err;
       }
    } /* END if (section1 != section2) */
 
-   snprintf(target, 1024, CGI_PREFIX "edit-actions-list?foo=%lu&f=%s",
+   snprintf(target, sizeof(target), CGI_PREFIX "edit-actions-list?foo=%lu&f=%i",
             (long) time(NULL), file->identifier);
 
    edit_free_file(file);