urlmatch.h

   1 #ifndef URL_MATCH_H
   2 #define URL_MATCH_H
   3
   4 #include "string-list.h"
   5
   6 struct url_info {
   7         /* normalized url on success, must be freed, otherwise NULL */
   8         char *url;
   9         /* if !url, a brief reason for the failure, otherwise NULL */
  10         const char *err;
  11
  12         /* the rest of the fields are only set if url != NULL */
  13
  14         size_t url_len;         /* total length of url (which is now normalized) */
  15         size_t scheme_len;      /* length of scheme name (excluding final :) */
  16         size_t user_off;        /* offset into url to start of user name (0 => none) */
  17         size_t user_len;        /* length of user name; if user_off != 0 but
  18                                    user_len == 0, an empty user name was given */
  19         size_t passwd_off;      /* offset into url to start of passwd (0 => none) */
  20         size_t passwd_len;      /* length of passwd; if passwd_off != 0 but
  21                                    passwd_len == 0, an empty passwd was given */
  22         size_t host_off;        /* offset into url to start of host name (0 => none) */
  23         size_t host_len;        /* length of host name;
  24                                  * file urls may have host_len == 0 */
  25         size_t port_off;        /* offset into url to start of port number (0 => none) */
  26         size_t port_len;        /* if a portnum is present (port_off != 0), it has
  27                                  * this length (excluding the leading ':') starting
  28                                  * from port_off (always 0 for file urls) */
  29         size_t path_off;        /* offset into url to the start of the url path;
  30                                  * this will always point to a '/' character
  31                                  * after the url has been normalized */
  32         size_t path_len;        /* length of path portion excluding any trailing
  33                                  * '?...' and '#...' portion; will always be >= 1 */
  34 };
  35
  36 char *url_normalize(const char *, struct url_info *);
  37
  38 struct urlmatch_item {
  39         size_t hostmatch_len;
  40         size_t pathmatch_len;
  41         char user_matched;
  42 };
  43
  44 struct urlmatch_config {
  45         struct string_list vars;
  46         struct url_info url;
  47         const char *section;
  48         const char *key;
  49
  50         void *cb;
  51         int (*collect_fn)(const char *var, const char *value, void *cb);
  52         int (*cascade_fn)(const char *var, const char *value, void *cb);
  53         /*
  54          * Compare the two matches, the one just discovered and the existing
  55          * best match and return a negative value if the found item is to be
  56          * rejected or a non-negative value if it is to be accepted.  If this
  57          * field is set to NULL, use the default comparison technique, which
  58          * checks to ses if found is better (according to the urlmatch
  59          * specificity rules) than existing.
  60          */
  61         int (*select_fn)(const struct urlmatch_item *found, const struct urlmatch_item *existing);
  62         /*
  63          * An optional callback to allow e.g. for partial URLs; it shall
  64          * return 1 or 0 depending whether `url` matches or not.
  65          */
  66         int (*fallback_match_fn)(const char *url, void *cb);
  67 };
  68
  69 #define URLMATCH_CONFIG_INIT { \
  70         .vars = STRING_LIST_INIT_DUP, \
  71 }
  72
  73 int urlmatch_config_entry(const char *var, const char *value, void *cb);
  74 void urlmatch_config_release(struct urlmatch_config *config);
  75
  76 #endif /* URL_MATCH_H */