1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
2 /* soup-form.c : utility functions for HTML forms */
5 * Copyright 2008 Red Hat, Inc.
14 #include "soup-form.h"
20 * @short_description: HTML form handling
21 * @see_also: #SoupMultipart
23 * libsoup contains several help methods for processing HTML forms as
25 * url="http://www.w3.org/TR/html401/interact/forms.html#h-17.13">the
26 * HTML 4.01 specification</ulink>.
30 * SOUP_FORM_MIME_TYPE_URLENCODED:
32 * A macro containing the value
33 * <literal>"application/x-www-form-urlencoded"</literal>; the default
34 * MIME type for POSTing HTML form data.
40 * SOUP_FORM_MIME_TYPE_MULTIPART:
42 * A macro containing the value
43 * <literal>"multipart/form-data"</literal>; the MIME type used for
44 * posting form data that contains files to be uploaded.
49 #define XDIGIT(c) ((c) <= '9' ? (c) - '0' : ((c) & 0x4F) - 'A' + 10)
50 #define HEXCHAR(s) ((XDIGIT (s[1]) << 4) + XDIGIT (s[2]))
53 form_decode (char *part)
57 s = d = (unsigned char *)part;
60 if (!g_ascii_isxdigit (s[1]) ||
61 !g_ascii_isxdigit (s[2]))
76 * @encoded_form: data of type "application/x-www-form-urlencoded"
78 * Decodes @form, which is an urlencoded dataset as defined in the
81 * Return value: (element-type utf8 utf8) (transfer full): a hash
82 * table containing the name/value pairs from @encoded_form, which you
83 * can free with g_hash_table_destroy().
86 soup_form_decode (const char *encoded_form)
88 GHashTable *form_data_set;
89 char **pairs, *eq, *name, *value;
92 form_data_set = g_hash_table_new_full (g_str_hash, g_str_equal,
94 pairs = g_strsplit (encoded_form, "&", -1);
95 for (i = 0; pairs[i]; i++) {
97 eq = strchr (name, '=');
103 if (!value || !form_decode (name) || !form_decode (value)) {
108 g_hash_table_replace (form_data_set, name, value);
112 return form_data_set;
116 * soup_form_decode_multipart:
117 * @msg: a #SoupMessage containing a "multipart/form-data" request body
118 * @file_control_name: (allow-none): the name of the HTML file upload control, or %NULL
119 * @filename: (out) (allow-none): return location for the name of the uploaded file, or %NULL
120 * @content_type: (out) (allow-none): return location for the MIME type of the uploaded file, or %NULL
121 * @file: (out) (allow-none): return location for the uploaded file data, or %NULL
123 * Decodes the "multipart/form-data" request in @msg; this is a
124 * convenience method for the case when you have a single file upload
125 * control in a form. (Or when you don't have any file upload
126 * controls, but are still using "multipart/form-data" anyway.) Pass
127 * the name of the file upload control in @file_control_name, and
128 * soup_form_decode_multipart() will extract the uploaded file data
129 * into @filename, @content_type, and @file. All of the other form
130 * control data will be returned (as strings, as with
131 * soup_form_decode()) in the returned #GHashTable.
133 * You may pass %NULL for @filename, @content_type and/or @file if you do not
134 * care about those fields. soup_form_decode_multipart() may also
135 * return %NULL in those fields if the client did not provide that
136 * information. You must free the returned filename and content-type
137 * with g_free(), and the returned file data with soup_buffer_free().
139 * If you have a form with more than one file upload control, you will
140 * need to decode it manually, using soup_multipart_new_from_message()
141 * and soup_multipart_get_part().
143 * Return value: (element-type utf8 utf8) (transfer full): a hash
144 * table containing the name/value pairs (other than
145 * @file_control_name) from @msg, which you can free with
146 * g_hash_table_destroy(). On error, it will return %NULL.
151 soup_form_decode_multipart (SoupMessage *msg, const char *file_control_name,
152 char **filename, char **content_type,
155 SoupMultipart *multipart;
156 GHashTable *form_data_set, *params;
157 SoupMessageHeaders *part_headers;
158 SoupBuffer *part_body;
159 char *disposition, *name;
162 g_return_val_if_fail (SOUP_IS_MESSAGE (msg), NULL);
164 multipart = soup_multipart_new_from_message (msg->request_headers,
172 *content_type = NULL;
176 form_data_set = g_hash_table_new_full (g_str_hash, g_str_equal,
178 for (i = 0; i < soup_multipart_get_length (multipart); i++) {
179 soup_multipart_get_part (multipart, i, &part_headers, &part_body);
180 if (!soup_message_headers_get_content_disposition (
181 part_headers, &disposition, ¶ms))
183 name = g_hash_table_lookup (params, "name");
184 if (g_ascii_strcasecmp (disposition, "form-data") != 0 ||
186 g_free (disposition);
187 g_hash_table_destroy (params);
191 if (file_control_name && !strcmp (name, file_control_name)) {
193 *filename = g_strdup (g_hash_table_lookup (params, "filename"));
195 *content_type = g_strdup (soup_message_headers_get_content_type (part_headers, NULL));
197 *file = soup_buffer_copy (part_body);
199 g_hash_table_insert (form_data_set,
201 g_strndup (part_body->data,
205 g_free (disposition);
206 g_hash_table_destroy (params);
209 soup_multipart_free (multipart);
210 return form_data_set;
214 append_form_encoded (GString *str, const char *in)
216 const unsigned char *s = (const unsigned char *)in;
220 g_string_append_c (str, '+');
222 } else if (!g_ascii_isalnum (*s) && (*s != '-') && (*s != '_')
224 g_string_append_printf (str, "%%%02X", (int)*s++);
226 g_string_append_c (str, *s++);
231 encode_pair (GString *str, const char *name, const char *value)
233 g_return_if_fail (name != NULL);
234 g_return_if_fail (value != NULL);
237 g_string_append_c (str, '&');
238 append_form_encoded (str, name);
239 g_string_append_c (str, '=');
240 append_form_encoded (str, value);
245 * @first_field: name of the first form field
246 * @...: value of @first_field, followed by additional field names
247 * and values, terminated by %NULL.
249 * Encodes the given field names and values into a value of type
250 * "application/x-www-form-urlencoded", as defined in the HTML 4.01
253 * This method requires you to know the names of the form fields (or
254 * at the very least, the total number of fields) at compile time; for
255 * working with dynamic forms, use soup_form_encode_hash() or
256 * soup_form_encode_datalist().
258 * Return value: the encoded form
261 soup_form_encode (const char *first_field, ...)
266 va_start (args, first_field);
267 encoded = soup_form_encode_valist (first_field, args);
274 * soup_form_encode_hash:
275 * @form_data_set: (element-type utf8 utf8): a hash table containing
276 * name/value pairs (as strings)
278 * Encodes @form_data_set into a value of type
279 * "application/x-www-form-urlencoded", as defined in the HTML 4.01
282 * Note that the HTML spec states that "The control names/values are
283 * listed in the order they appear in the document." Since this method
284 * takes a hash table, it cannot enforce that; if you care about the
285 * ordering of the form fields, use soup_form_encode_datalist().
287 * Return value: the encoded form
290 soup_form_encode_hash (GHashTable *form_data_set)
292 GString *str = g_string_new (NULL);
294 gpointer name, value;
296 g_hash_table_iter_init (&iter, form_data_set);
297 while (g_hash_table_iter_next (&iter, &name, &value))
298 encode_pair (str, name, value);
299 return g_string_free (str, FALSE);
303 datalist_encode_foreach (GQuark key_id, gpointer value, gpointer str)
305 encode_pair (str, g_quark_to_string (key_id), value);
309 * soup_form_encode_datalist:
310 * @form_data_set: a datalist containing name/value pairs
312 * Encodes @form_data_set into a value of type
313 * "application/x-www-form-urlencoded", as defined in the HTML 4.01
314 * spec. Unlike soup_form_encode_hash(), this preserves the ordering
315 * of the form elements, which may be required in some situations.
317 * Return value: the encoded form
320 soup_form_encode_datalist (GData **form_data_set)
322 GString *str = g_string_new (NULL);
324 g_datalist_foreach (form_data_set, datalist_encode_foreach, str);
325 return g_string_free (str, FALSE);
329 * soup_form_encode_valist:
330 * @first_field: name of the first form field
331 * @args: pointer to additional values, as in soup_form_encode()
333 * See soup_form_encode(). This is mostly an internal method, used by
334 * various other methods such as soup_uri_set_query_from_fields() and
335 * soup_form_request_new().
337 * Return value: the encoded form
340 soup_form_encode_valist (const char *first_field, va_list args)
342 GString *str = g_string_new (NULL);
343 const char *name, *value;
346 value = va_arg (args, const char *);
347 while (name && value) {
348 encode_pair (str, name, value);
350 name = va_arg (args, const char *);
352 value = va_arg (args, const char *);
355 return g_string_free (str, FALSE);
359 soup_form_request_for_data (const char *method, const char *uri_string,
365 uri = soup_uri_new (uri_string);
369 if (!strcmp (method, "GET")) {
371 uri->query = form_data;
373 msg = soup_message_new_from_uri (method, uri);
374 } else if (!strcmp (method, "POST") || !strcmp (method, "PUT")) {
375 msg = soup_message_new_from_uri (method, uri);
377 soup_message_set_request (
378 msg, SOUP_FORM_MIME_TYPE_URLENCODED,
380 form_data, strlen (form_data));
382 g_warning ("invalid method passed to soup_form_request_new");
386 msg = soup_message_new_from_uri (method, uri);
394 * soup_form_request_new:
395 * @method: the HTTP method, either "GET" or "POST"
396 * @uri: the URI to send the form data to
397 * @first_field: name of the first form field
398 * @...: value of @first_field, followed by additional field names
399 * and values, terminated by %NULL.
401 * Creates a new %SoupMessage and sets it up to send the given data
402 * to @uri via @method. (That is, if @method is "GET", it will encode
403 * the form data into @uri's query field, and if @method is "POST", it
404 * will encode it into the %SoupMessage's request_body.)
406 * Return value: (transfer full): the new %SoupMessage
409 soup_form_request_new (const char *method, const char *uri,
410 const char *first_field, ...)
415 va_start (args, first_field);
416 form_data = soup_form_encode_valist (first_field, args);
419 return soup_form_request_for_data (method, uri, form_data);
423 * soup_form_request_new_from_hash:
424 * @method: the HTTP method, either "GET" or "POST"
425 * @uri: the URI to send the form data to
426 * @form_data_set: (element-type utf8 utf8): the data to send to @uri
428 * Creates a new %SoupMessage and sets it up to send @form_data_set to
429 * @uri via @method, as with soup_form_request_new().
431 * Return value: (transfer full): the new %SoupMessage
434 soup_form_request_new_from_hash (const char *method, const char *uri,
435 GHashTable *form_data_set)
437 return soup_form_request_for_data (
438 method, uri, soup_form_encode_hash (form_data_set));
442 * soup_form_request_new_from_datalist:
443 * @method: the HTTP method, either "GET" or "POST"
444 * @uri: the URI to send the form data to
445 * @form_data_set: the data to send to @uri
447 * Creates a new %SoupMessage and sets it up to send @form_data_set to
448 * @uri via @method, as with soup_form_request_new().
450 * Return value: (transfer full): the new %SoupMessage
453 soup_form_request_new_from_datalist (const char *method, const char *uri,
454 GData **form_data_set)
456 return soup_form_request_for_data (
457 method, uri, soup_form_encode_datalist (form_data_set));
461 * soup_form_request_new_from_multipart:
462 * @uri: the URI to send the form data to
463 * @multipart: a "multipart/form-data" #SoupMultipart
465 * Creates a new %SoupMessage and sets it up to send @multipart to
468 * To send a <literal>"multipart/form-data"</literal> POST, first
469 * create a #SoupMultipart, using %SOUP_FORM_MIME_TYPE_MULTIPART as
470 * the MIME type. Then use soup_multipart_append_form_string() and
471 * soup_multipart_append_form_file() to add the value of each form
472 * control to the multipart. (These are just convenience methods, and
473 * you can use soup_multipart_append_part() if you need greater
474 * control over the part headers.) Finally, call
475 * soup_form_request_new_from_multipart() to serialize the multipart
476 * structure and create a #SoupMessage.
478 * Return value: (transfer full): the new %SoupMessage
483 soup_form_request_new_from_multipart (const char *uri,
484 SoupMultipart *multipart)
488 msg = soup_message_new ("POST", uri);
489 #if ENABLE(TIZEN_EXT)
492 soup_multipart_to_message (multipart, msg->request_headers,