/** @return -2 if no data was read but the caller should retry;
* -1 if an error occurred and *@a error was set; 0 at end of data;
* a positive number if that many bytes were read.
*
* @relates http_post */
static int
read_http_post_inline(struct http_post *http_post,
unsigned char buffer[], int max,
struct connection_state *error)
{
const unsigned char *post = http_post->post_data;
const unsigned char *end = (const unsigned char *)strchr((char *)post, FILE_CHAR);
int total = 0;
assert(http_post->post_fd < 0);
if_assert_failed { *error = connection_state(S_INTERNAL); return -1; }
if (!end)
end = (const unsigned char *)strchr((char *)post, '\0');
while (post < end && total < max) {
int h1, h2;
h1 = unhx(post[0]);
assertm(h1 >= 0 && h1 < 16, "h1 in the POST buffer is %d (%d/%c)", h1, post[0], post[0]);
if_assert_failed h1 = 0;
h2 = unhx(post[1]);
assertm(h2 >= 0 && h2 < 16, "h2 in the POST buffer is %d (%d/%c)", h2, post[1], post[1]);
if_assert_failed h2 = 0;
buffer[total++] = (h1<<4) + h2;
post += 2;
}
if (post != end || *end != FILE_CHAR) {
http_post->post_data = post;
return total;
}
http_post->file_read = 0;
end = (const unsigned char *)strchr((char *)(post + 1), FILE_CHAR);
assert(end);
http_post->post_fd = open((const char *)http_post->files[http_post->file_index].name,
O_RDONLY);
/* Be careful not to change errno here. */
if (http_post->post_fd < 0) {
http_post->post_data = post;
if (total > 0)
return total; /* retry the open on the next call */
else {
*error = connection_state_for_errno(errno);
return -1;
}
}
http_post->post_data = end + 1;
return total ? total : -2;
}
static void
decode_q_segment(struct string *str, unsigned char *in, unsigned char *end)
{
int c;
while ((c = *in++) != 0 && (in <= end)) {
if (c == '=') {
int d = *in++;
if (d == '\n' || !d)
break; /* drop trailing newline */
d = (unhx(d) << 4) | unhx(*in++);
add_format_to_string(str, "&#%d;", d);
continue;
}
if (c == '_') /* rfc2047 4.2 (2) */
c = 0x20;
add_char_to_string(str, c);
}
}
