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[project @ 2004-08-08 19:13:40 by bursa]

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Fix form submitting with an empty file upload. Update form_textarea_value(). Purge xcalloc() etc from form.c and handle memory exhaustion.

svn path=/import/netsurf/; revision=1195
This commit is contained in:
James Bursa 2004-08-08 19:13:40 +00:00
parent 94103b8c96
commit 8337acfc78
3 changed files with 166 additions and 86 deletions
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15
desktop/browser.c
View File

@ -1638,12 +1638,20 @@ void browser_form_submit(struct browser_window *bw, struct form *form,
assert(form);
assert(bw->current_content->type == CONTENT_HTML);
success = form_successful_controls(form, submit_button);
if (!form_successful_controls(form, submit_button, &success)) {
warn_user("NoMemory", 0);
return;
}
base = bw->current_content->data.html.base_url;
switch (form->method) {
case method_GET:
data = form_url_encode(success);
if (!data) {
form_free_successful(success);
warn_user("NoMemory", 0);
return;
}
url = xcalloc(1, strlen(form->action) + strlen(data) + 2);
if(form->action[strlen(form->action)-1] == '?') {
sprintf(url, "%s%s", form->action, data);
@ -1659,6 +1667,11 @@ void browser_form_submit(struct browser_window *bw, struct form *form,
case method_POST_URLENC:
data = form_url_encode(success);
if (!data) {
form_free_successful(success);
warn_user("NoMemory", 0);
return;
}
url = url_join(form->action, base);
if (!url)
break;

232
render/form.c
View File

@ -2,7 +2,7 @@
* This file is part of NetSurf, http://netsurf.sourceforge.net/
* Licensed under the GNU General Public License,
* http://www.opensource.org/licenses/gpl-license
* Copyright 2003 James Bursa <bursa@users.sourceforge.net>
* Copyright 2004 James Bursa <bursa@users.sourceforge.net>
* Copyright 2003 Phil Mellor <monkeyson@users.sourceforge.net>
*/
@ -100,23 +100,28 @@ void form_free_control(struct form_control *control)
/**
* Identify 'successful' controls.
*
* \param form form to search for successful controls
* \param submit_button control used to submit the form, if any
* \parma successful_controls updated to point to linked list of
* form_successful_control, 0 if no controls
* \return true on success, false on memory exhaustion
*
* See HTML 4.01 section 17.13.2.
*/
struct form_successful_control *form_successful_controls(struct form *form,
struct form_control *submit_button)
bool form_successful_controls(struct form *form,
struct form_control *submit_button,
struct form_successful_control **successful_controls)
{
struct form_control *control;
struct form_option *option;
struct form_successful_control sentinel, *last_success;
struct form_successful_control sentinel, *last_success, *success_new;
char *value;
last_success = &sentinel;
sentinel.next = 0;
for (control = form->controls; control; control = control->next) {
struct form_successful_control *success_new;
bool add_val;
/* ignore disabled controls */
if (control->disabled)
continue;
@ -129,15 +134,20 @@ struct form_successful_control *form_successful_controls(struct form *form,
case GADGET_HIDDEN:
case GADGET_TEXTBOX:
case GADGET_PASSWORD:
add_val = true;
value = strdup(control->value);
if (!value)
goto no_memory;
break;
case GADGET_RADIO:
case GADGET_CHECKBOX:
/* ignore checkboxes and radio buttons which
* aren't selected
*/
add_val = control->selected;
* aren't selected */
if (!control->selected)
continue;
value = strdup(control->value);
if (!value)
goto no_memory;
break;
case GADGET_SELECT:
@ -145,31 +155,34 @@ struct form_successful_control *form_successful_controls(struct form *form,
for (option = control->data.select.items;
option != NULL;
option = option->next) {
if (option->selected) {
success_new = xcalloc(1, sizeof(*success_new));
success_new->file = false;
success_new->name = cnv_str_local_enc(control->name);
success_new->value = cnv_str_local_enc(option->value);
success_new->next = NULL;
last_success->next = success_new;
last_success = success_new;
}
if (!option->selected)
continue;
success_new = malloc(sizeof(*success_new));
if (!success_new)
goto no_memory;
success_new->file = false;
success_new->name = strdup(control->name);
success_new->value = strdup(option->value);
success_new->next = NULL;
last_success->next = success_new;
last_success = success_new;
if (!success_new->name ||
!success_new->value)
goto no_memory;
}
add_val = false;
continue;
break;
case GADGET_TEXTAREA:
/* textarea */
success_new = xcalloc(1, sizeof(*success_new));
success_new->file = false;
success_new->name = cnv_str_local_enc(control->name);
success_new->value = form_textarea_value(control);
success_new->next = 0;
last_success->next = success_new;
last_success = success_new;
add_val = false;
value = form_textarea_value(control);
if (!value)
goto no_memory;
if (value[0] == 0) {
free(value);
continue;
}
break;
case GADGET_IMAGE: {
@ -177,54 +190,85 @@ struct form_successful_control *form_successful_controls(struct form *form,
const size_t len = strlen(control->name) + 3;
/* x */
success_new = xcalloc(1, sizeof(*success_new));
success_new = malloc(sizeof(*success_new));
if (!success_new)
goto no_memory;
success_new->file = false;
success_new->name = xcalloc(1, len);
sprintf(success_new->name, "%s.x", control->name);
success_new->value = xcalloc(1, 20);
sprintf(success_new->value, "%i", control->data.image.mx);
success_new->name = malloc(len);
success_new->value = malloc(20);
if (!success_new->name ||
!success_new->value) {
free(success_new->name);
free(success_new->value);
free(success_new);
goto no_memory;
}
sprintf(success_new->name, "%s.x",
control->name);
sprintf(success_new->value, "%i",
control->data.image.mx);
success_new->next = 0;
last_success->next = success_new;
last_success = success_new;
/* y */
success_new = xcalloc(1, sizeof(*success_new));
success_new = malloc(sizeof(*success_new));
if (!success_new)
goto no_memory;
success_new->file = false;
success_new->name = xcalloc(1, len);
sprintf(success_new->name, "%s.y", control->name);
success_new->value = xcalloc(1, 20);
sprintf(success_new->value, "%i", control->data.image.my);
success_new->name = malloc(len);
success_new->value = malloc(20);
if (!success_new->name ||
!success_new->value) {
free(success_new->name);
free(success_new->value);
free(success_new);
goto no_memory;
}
sprintf(success_new->name, "%s.y",
control->name);
sprintf(success_new->value, "%i",
control->data.image.my);
success_new->next = 0;
last_success->next = success_new;
last_success = success_new;
add_val = false;
continue;
break;
}
case GADGET_SUBMIT:
/* only the activated submit button is
* successful
*/
add_val = (control != submit_button) ? false : true;
* successful */
if (control != submit_button)
continue;
value = strdup(control->value);
if (!value)
goto no_memory;
break;
case GADGET_RESET:
/* ignore reset */
add_val = false;
continue;
break;
case GADGET_FILE:
/* file */
success_new = xcalloc(1, sizeof(*success_new));
if (!control->value)
continue;
success_new = malloc(sizeof(*success_new));
if (!success_new)
goto no_memory;
success_new->file = true;
success_new->name = cnv_str_local_enc(control->name);
success_new->value = cnv_str_local_enc(control->value);
success_new->name = strdup(control->name);
success_new->value = strdup(control->value);
success_new->next = 0;
last_success->next = success_new;
last_success = success_new;
if (!success_new->name || !success_new->value)
goto no_memory;
add_val = false;
continue;
break;
default:
@ -232,58 +276,65 @@ struct form_successful_control *form_successful_controls(struct form *form,
break;
}
/* all others added if they have a value */
if (add_val && control->value != NULL) {
success_new = xcalloc(1, sizeof(*success_new));
success_new->file = false;
success_new->name = cnv_str_local_enc(control->name);
success_new->value = cnv_str_local_enc(control->value);
success_new->next = NULL;
last_success->next = success_new;
last_success = success_new;
}
success_new = malloc(sizeof(*success_new));
if (!success_new)
goto no_memory;
success_new->file = false;
success_new->name = strdup(control->name);
success_new->value = value;
success_new->next = NULL;
last_success->next = success_new;
last_success = success_new;
if (!success_new->name)
goto no_memory;
}
return sentinel.next;
*successful_controls = sentinel.next;
return true;
no_memory:
warn_user("NoMemory", 0);
form_free_successful(sentinel.next);
return false;
}
/**
* Find the value for a textarea control.
*
* \param textarea control of type GADGET_TEXTAREA
* \return the value as a UTF-8 string on heap, or 0 on memory exhaustion
*/
char *form_textarea_value(struct form_control *textarea)
{
unsigned int len = 1;
unsigned int len = 0;
char *value, *s;
struct box *inline_container, *text_box;
struct box *text_box;
/* find required length */
for (inline_container = textarea->box->children;
inline_container != NULL;
inline_container = inline_container->next) {
for (text_box = inline_container->children;
text_box != NULL;
text_box = text_box->next) {
for (text_box = textarea->box->children->children; text_box;
text_box = text_box->next) {
if (text_box->type == BOX_INLINE)
len += text_box->length + 1;
}
len += 2;
else /* BOX_BR */
len += 2;
}
/* construct value */
s = value = xcalloc(1, len);
for (inline_container = textarea->box->children;
inline_container != NULL;
inline_container = inline_container->next) {
for (text_box = inline_container->children;
text_box != NULL;
text_box = text_box->next) {
s = value = malloc(len + 1);
if (!s)
return 0;
for (text_box = textarea->box->children->children; text_box;
text_box = text_box->next) {
if (text_box->type == BOX_INLINE) {
strncpy(s, text_box->text, text_box->length);
s += text_box->length;
*s++ = ' ';
} else { /* BOX_BR */
*s++ = '\r';
*s++ = '\n';
}
*s++ = '\r';
*s++ = '\n';
}
*s = 0;
@ -293,18 +344,33 @@ char *form_textarea_value(struct form_control *textarea)
/**
* Encode controls using application/x-www-form-urlencoded.
*
* \param control linked list of form_successful_control
* \return URL-encoded form, or 0 on memory exhaustion
*
* \todo encoding conversion
*/
char *form_url_encode(struct form_successful_control *control)
{
char *s = xcalloc(1, 0);
char *name, *value;
char *s = malloc(1), *s2;
unsigned int len = 0, len1;
if (!s)
return 0;
s[0] = 0;
for (; control; control = control->next) {
const char *name = curl_escape(control->name, 0);
const char *value = curl_escape(control->value, 0);
name = curl_escape(control->name, 0);
value = curl_escape(control->value, 0);
len1 = len + strlen(name) + strlen(value) + 2;
s = xrealloc(s, len1 + 1);
s2 = realloc(s, len1 + 1);
if (!s2) {
free(s);
return 0;
}
s = s2;
sprintf(s + len, "%s=%s&", name, value);
len = len1;
curl_free(name);

5
render/form.h
View File

@ -100,8 +100,9 @@ struct form_successful_control {
struct form_control *form_new_control(form_control_type type);
void form_add_control(struct form *form, struct form_control *control);
void form_free_control(struct form_control *control);
struct form_successful_control *form_successful_controls(struct form *form,
struct form_control *submit_button);
bool form_successful_controls(struct form *form,
struct form_control *submit_button,
struct form_successful_control **successful_controls);
char *form_url_encode(struct form_successful_control *control);
void form_free_successful(struct form_successful_control *control);