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curl_formget: fix FILE * leak

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Properly deal with the fact that the last fread() call most probably is
a short read, and when using callbacks in fact all calls can be short
reads. No longer consider a file read done until it returns a 0 from the
read function.

Reported by: Aaron Orenstein
Bug: http://curl.haxx.se/mail/lib-2011-06/0048.html
This commit is contained in:
Daniel Stenberg 2011-06-13 22:32:00 +02:00
parent 85881f9f35
commit 0aedccc18a
3 changed files with 28 additions and 3 deletions
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11
lib/formdata.c
View file

@ -891,7 +891,7 @@ int curl_formget(struct curl_httppost *form, void *arg,
Curl_formclean(&data);
return -1;
}
} while(nread == sizeof(buffer));
} while(nread);
}
else {
if(ptr->length != append(arg, ptr->line, ptr->length)) {
@ -1306,6 +1306,11 @@ static size_t readfromfile(struct Form *form, char *buffer,
return 0;
else
nread = form->fread_func(buffer, 1, size, form->data->line);
if(nread > size)
/* the read callback can return a value larger than the buffer but
treat any such as no data in this case */
nread = 0;
}
else {
if(!form->fp) {
@ -1316,9 +1321,9 @@ static size_t readfromfile(struct Form *form, char *buffer,
}
nread = fread(buffer, 1, size, form->fp);
}
if(!nread || nread > size) {
if(!nread) {
/* this is the last chunk from the file, move on */
if(!callback) {
if(form->fp) {
fclose(form->fp);
form->fp = NULL;
}