since: 2.66


g_uri_parse_params (
  const gchar* params,
  gssize length,
  const gchar* separators,
  GUriParamsFlags flags,
  GError** error


Many URI schemes include one or more attribute/value pairs as part of the URI value. This method can be used to parse them into a hash table. When an attribute has multiple occurrences, the last value is the final returned value. If you need to handle repeated attributes differently, use GUriParamsIter.

The params string is assumed to still be %-encoded, but the returned values will be fully decoded. (Thus it is possible that the returned values may contain = or separators, if the value was encoded in the input.) Invalid %-encoding is treated as with the G_URI_FLAGS_PARSE_RELAXED rules for g_uri_parse(). (However, if params is the path or query string from a GUri that was parsed without G_URI_FLAGS_PARSE_RELAXED and G_URI_FLAGS_ENCODED, then you already know that it does not contain any invalid encoding.)

G_URI_PARAMS_WWW_FORM is handled as documented for g_uri_params_iter_init().

If G_URI_PARAMS_CASE_INSENSITIVE is passed to flags, attributes will be compared case-insensitively, so a params string attr=123&Attr=456 will only return a single attribute–value pair, Attr=456. Case will be preserved in the returned attributes.

If params cannot be parsed (for example, it contains two separators characters in a row), then error is set and NULL is returned.

Available since: 2.66



Type: const gchar*

A %-encoded string containing attribute=value parameters.

The data is owned by the caller of the function.
The value is a NUL terminated UTF-8 string.

Type: gssize

The length of params, or -1 if it is nul-terminated.


Type: const gchar*

The separator byte character set between parameters. (usually &, but sometimes ; or both &;). Note that this function works on bytes not characters, so it can’t be used to delimit UTF-8 strings for anything but ASCII characters. You may pass an empty set, in which case no splitting will occur.

The data is owned by the caller of the function.
The value is a NUL terminated UTF-8 string.

Type: GUriParamsFlags

Flags to modify the way the parameters are handled.


Type: GError **

The return location for a recoverable error.

The argument can be NULL.
If the return location is not NULL, then you must initialize it to a NULL GError*.
The argument will left initialized to NULL by the function if there are no errors.
In case of error, the argument will be set to a newly allocated GError; the caller will take ownership of the data, and be responsible for freeing it.

Return value

Type: GHashTable

A hash table of attribute/value pairs, with both names and values
fully-decoded; or `NULL` on error.

The caller of the function takes ownership of the data, and is responsible for freeing it.