static int read_chunk(http_resp *a_resp, http_trans_conn *a_conn)
{
char *l_end_chunk_hdr = NULL;
int l_len = 0;
int i = 0;
int j = 0;
char *l_ptr = NULL;
// int l_left_to_read = 0;
int l_rv = 0;
if (a_conn->chunk_len == 0)
{
/* check to make sure that the pattern is in the
buffer */
do
{
#if GHTTP_DEBUG
j = a_conn->io_buf_alloc > 16 ? 16 : a_conn->io_buf_alloc;
for(i=0; i<j; i++)
printf("%02x ", a_conn->io_buf[i]);
printf("\n");
#endif
if ((l_end_chunk_hdr =
http_trans_buf_has_patt(a_conn->io_buf, a_conn->io_buf_alloc,
"\r\n", 2)) == NULL)
{
ghttpDebug("l_end_chunk_hdr is null \n");
l_rv = http_trans_read_into_buf(a_conn);
if (l_rv == HTTP_TRANS_ERR)
return HTTP_TRANS_ERR;
/* check to see if the remote end hung up. */
if ((l_rv == HTTP_TRANS_DONE) && (a_conn->last_read == 0))
return HTTP_TRANS_ERR;
if ((a_conn->sync == HTTP_TRANS_ASYNC) && (l_rv == HTTP_TRANS_NOT_DONE)){
a_conn->io_buf_flush_en = 0;
return HTTP_TRANS_NOT_DONE;
}
}
ghttpDebug("l_end_chunk_hdr: %u \n", l_end_chunk_hdr ? (unsigned int)(l_end_chunk_hdr - a_conn->io_buf) : 0);
}
while (l_end_chunk_hdr == NULL);
/* set the begining at the start of the buffer */
l_ptr = a_conn->io_buf;
/* eat the hex value of the chunk */
while ((l_ptr < l_end_chunk_hdr) &&
(((tolower(*l_ptr) <= 'f') && (tolower(*l_ptr) >= 'a')) ||
((*l_ptr <= '9') && (*l_ptr >= '0'))))
{
ghttpDebug("chunk char: %c \n", *l_ptr);
l_ptr++;
}
/* get the length of the hex number */
l_len = l_ptr - a_conn->io_buf;
if (l_len == 0)
{
a_conn->chunk_len = -1;
a_conn->errstr = GHTTP_ERROR_TRANS_CHUNK_LENGTH;
return HTTP_TRANS_ERR;
}
/* walk the size adding the values as you go along. */
for (i=0, j=l_len-1; i < l_len; i++, j--)
{
if ((tolower(a_conn->io_buf[i]) <= 'f') && (tolower(a_conn->io_buf[i]) >= 'a'))
a_conn->chunk_len += (tolower(a_conn->io_buf[i]) - 0x57) << (4*j);
else
a_conn->chunk_len += (tolower(a_conn->io_buf[i]) - 0x30) << (4*j);
}
/* reset the pointer past the end of the header */
http_trans_buf_clip(a_conn, l_end_chunk_hdr + 2);
a_conn->chunk_unread_len = 0;
if(a_conn->chunk_len > 0){
/* figure out how much we need to read */
a_conn->chunk_unread_len = a_conn->chunk_len - a_conn->io_buf_alloc+2;
}
ghttpDebug("chunk_len: %d; chunk_unread_len: %d \n", a_conn->chunk_len, a_conn->chunk_unread_len);
}
/* check to see if it's the last chunk. If not then add it.*/
if (a_conn->chunk_len != 0)
{
ghttpDebug("chunk_len: %d; chunk_unread_len: %d \n", a_conn->chunk_len, a_conn->chunk_unread_len);
/* check to make sure that we actually need to read anything in. */
if (a_conn->chunk_unread_len > 0)
{
/* append it */
do
{
a_conn->io_buf_io_left = a_conn->chunk_unread_len;
a_conn->io_buf_io_done = 0;
l_rv = http_trans_read_into_buf(a_conn);
if(a_conn->last_read > 0)
a_conn->chunk_unread_len -= a_conn->last_read;
if (l_rv == HTTP_TRANS_ERR)
return HTTP_TRANS_ERR;
/* check and see if the server hung up. */
if ((l_rv == HTTP_TRANS_DONE) && (a_conn->last_read == 0))
return HTTP_TRANS_ERR;
if ((a_conn->sync == HTTP_TRANS_ASYNC) && (l_rv == HTTP_TRANS_NOT_DONE))
return HTTP_TRANS_NOT_DONE;
}
while (l_rv == HTTP_TRANS_NOT_DONE);
}
}
ghttpDebug("chunk_len: %d; chunk_unread_len: %d \n", a_conn->chunk_len, a_conn->chunk_unread_len);
if(a_conn->chunk_unread_len < 0 && a_conn->chunk_len != 0)
{
#if GHTTP_DEBUG
j = a_conn->io_buf_alloc - a_conn->chunk_len;
j = j > 16 ? (a_conn->chunk_len + 16) : a_conn->io_buf_alloc;
printf("[%02x] ", a_conn->io_buf[a_conn->chunk_len-1]);
for(i=a_conn->chunk_len; i<j; i++)
printf("%02x ", a_conn->io_buf[i]);
printf("\n");
#endif
set_tmpbody(a_resp, a_conn, a_conn->chunk_len + 2);
a_conn->chunk_len = 0;
return HTTP_TRANS_NOT_DONE;
}
if (a_conn->chunk_unread_len == 0 && a_conn->chunk_len != 0){
a_conn->chunk_len = 0;
return HTTP_TRANS_NOT_DONE;
}
/* we only get here if there was an error. */
if (a_conn->chunk_len == 0)
return HTTP_TRANS_DONE;
return HTTP_TRANS_ERR;
}
int http_resp_read_headers(http_resp *a_resp, http_trans_conn *a_conn)
{
char *l_start_body = NULL;
int l_rv = 0;
int l_done = 0;
int l_return = HTTP_TRANS_DONE;
char *l_start_header = NULL;
int l_header_len = 0;
char *l_last_header = NULL;
int l_last_header_len = 0;
char *l_start_value = NULL;
int l_value_len = 0;
char *l_cur_ptr = NULL;
char *l_ptr = NULL;
header_state l_state = reading_header;
/* check to see if we need to jump in somewhere */
if (a_conn->sync == HTTP_TRANS_ASYNC)
{
if (a_resp->header_state == http_resp_reading_header)
goto http_resp_reading_header_jump;
}
/* start reading headers */
do
{
a_resp->header_state = http_resp_reading_header;
http_resp_reading_header_jump:
/* read in the buffer */
l_rv = http_trans_read_into_buf(a_conn);
/* check for an error */
if (l_rv == HTTP_TRANS_ERR)
{
a_conn->errstr = "Failed to read http response line";
l_return = HTTP_TRANS_ERR;
goto ec;
}
/* check to see if the end of headers string is in the buffer */
l_start_body = http_trans_buf_has_patt(a_conn->io_buf, a_conn->io_buf_alloc, "\r\n\r\n", 4);
if (l_start_body != NULL)
l_done = 1;
if ((l_done == 0) && (a_conn->sync == HTTP_TRANS_ASYNC) && (l_rv == HTTP_TRANS_NOT_DONE))
return HTTP_TRANS_NOT_DONE;
/* yes, that !l_done is ther because in the case of a 100
continue we well get back up to this loop without doing a
successful read. */
if ((!l_done) && (l_rv == HTTP_TRANS_DONE) && (a_conn->last_read == 0))
{
a_conn->errstr = "Short read while reading http response headers";
return HTTP_TRANS_ERR;
}
}
while (l_done == 0);
/* parse out the response header */
/* check to make sure that there's enough that came back */
if ((a_conn->io_buf_alloc) < 14)
{
a_conn->errstr = "The http response line was too short.";
l_return = HTTP_TRANS_ERR;
goto ec;
}
l_ptr = a_conn->io_buf;
/* can you say PARANOID? I thought you could. */
if (strncmp(l_ptr, "HTTP", 4) != 0)
{
a_conn->errstr = "The http response line did not begin with \"HTTP\"";
l_return = HTTP_TRANS_ERR;
goto ec;
}
if ((isdigit(l_ptr[5]) == 0) || /* http ver */
(l_ptr[6] != '.') ||
(isdigit(l_ptr[7]) == 0) ||
(l_ptr[8] != ' ') || /* space */
(isdigit(l_ptr[9]) == 0) || /* code */
(isdigit(l_ptr[10]) == 0) ||
(isdigit(l_ptr[11]) == 0) ||
(l_ptr[12] != ' ')) /* space */
{
a_conn->errstr = "Error parsing http response line";
l_return = HTTP_TRANS_ERR;
goto ec;
}
/* convert char into int */
a_resp->http_ver = (l_ptr[5] - 0x30);
a_resp->http_ver += ((l_ptr[7] - 0x30) / 10.0);
/* convert the response into an int */
a_resp->status_code = ((l_ptr[9] - 0x30)*100);
a_resp->status_code += ((l_ptr[10] - 0x30)*10);
a_resp->status_code += (l_ptr[11] - 0x30);
/* get the length of the reason_phrase */
l_cur_ptr = &l_ptr[13];
/* you can't overrun this because you already know that
there has to be a '\r' above from searching from the
end of the headers */
while (*l_cur_ptr != '\r')
l_cur_ptr++;
/* make sure to free the buffer if it's already allocated */
if (a_resp->reason_phrase)
{
free(a_resp->reason_phrase);
a_resp->reason_phrase = NULL;
}
/* allocate space for the reason phrase */
a_resp->reason_phrase = malloc((l_cur_ptr - (&l_ptr[13])) + 1);
memset(a_resp->reason_phrase, 0, ((l_cur_ptr - (&l_ptr[13])) + 1));
memcpy(a_resp->reason_phrase, &l_ptr[13], (l_cur_ptr - (&l_ptr[13])));
/* see if there are any headers. If there aren't any headers
then the end of the reason phrase is the same as the start body
as above. If that's the case then skip reading any headers. */
if (l_cur_ptr == l_start_body)
l_done = 1;
else
l_done = 0;
/* make sure that it's not a continue. */
if (a_resp->status_code == 100)
{
/* look for the next \r\n\r\n and cut it off */
char *l_end_continue = http_trans_buf_has_patt(a_conn->io_buf, a_conn->io_buf_alloc, "\r\n\r\n", 4);
if (!l_end_continue)
return HTTP_TRANS_ERR;
http_trans_buf_clip(a_conn, l_end_continue + 4);
l_start_body = NULL;
a_resp->status_code = 0;
l_done = 0;
if (a_conn->sync == HTTP_TRANS_ASYNC)
return HTTP_TRANS_NOT_DONE;
else
goto http_resp_reading_header_jump;
}
/* set the start past the end of the reason phrase,
checking if there's a CRLF after it. */
while ((*l_cur_ptr == '\r') || (*l_cur_ptr == '\n'))
l_cur_ptr++;
/* start parsing out the headers */
/* start at the beginning */
l_start_header = l_cur_ptr;
while (l_done == 0)
{
/* check to see if we're at the end of the
headers as determined above by the _patt() call */
if (l_cur_ptr == (l_start_body + 1))
break;
/* reading the header name */
if (l_state == reading_header)
{
/* check to see if there's leading whitespace.
If that's the case then it needs to be combined
from the previous header */
if (l_header_len == 0)
{
if ((*l_cur_ptr == ' ') || (*l_cur_ptr == '\t'))
{
/* bomb if it's the first header. That's not valid */
if ((l_last_header == NULL) || (l_last_header_len == 0))
{
a_conn->errstr = "The first http response header began with whitespace";
l_return = HTTP_TRANS_ERR;
goto ec;
}
l_cur_ptr++;
/* set it reading sep. sep will eat all of the write space */
l_state = reading_sep;
continue;
}
}
if (*l_cur_ptr == ':')
{
/* make sure that there's some header there */
if (l_header_len == 0)
{
a_conn->errstr = "An http response header was zero length";
l_return = HTTP_TRANS_ERR;
goto ec;
}
/* start reading the seperator */
l_state = reading_sep;
l_cur_ptr++;
}
/* make sure there's a seperator in
there somewhere */
else if (*l_cur_ptr == '\r')
{
a_conn->errstr = "Failed to find seperator in http response headers";
l_return = HTTP_TRANS_ERR;
goto ec;
}
else
{
l_cur_ptr++;
l_header_len++;
}
}
/* read the seperator */
else if(l_state == reading_sep)
{
/* walk until you get a non-whitespace character */
if ((*l_cur_ptr == ' ') || (*l_cur_ptr == '\t'))
l_cur_ptr++;
else
{
l_state = reading_value;
l_start_value = l_cur_ptr;
l_value_len = 0;
}
}
/* read the value */
else if(l_state == reading_value)
{
/* check to see if we've reached the end of the
value */
if ((*l_cur_ptr == '\r') || (*l_cur_ptr == '\n'))
{
/* check to see if this is a continuation of the last
header. If the header len is 0 and we've gotten to
this point then that's the case */
if (l_header_len == 0)
{
http_hdr_set_value_no_nts(a_resp->headers, l_last_header, l_last_header_len, l_start_value,
l_value_len);
}
else
{
http_hdr_set_value_no_nts(a_resp->headers, l_start_header, l_header_len, l_start_value,
l_value_len);
/* set the last header and the length so that a new line
that starts with spaces can figure out what header it applies to */
l_last_header = l_start_header;
l_last_header_len = l_header_len;
}
/* start eating the end of line */
l_state = reading_eol;
}
else
{
l_cur_ptr++;
l_value_len++;
}
}
/* read the eof */
else if(l_state == reading_eol)
{
/* eat the eol */
if ((*l_cur_ptr == '\r') || (*l_cur_ptr == '\n'))
l_cur_ptr++;
else
{
/* start reading a new header again. */
l_state = reading_header;
l_start_header = l_cur_ptr;
l_header_len = 0;
}
}
/* what state is this? */
else
{
a_conn->errstr = "Unknown state while reading http response headers";
l_return = HTTP_TRANS_ERR;
goto ec;
}
}
/* clip the buffer */
http_trans_buf_clip(a_conn, l_start_body + 4);
ghttpDebug("first body len : %d \n", a_conn->io_buf_alloc);
ec:
if(l_return == HTTP_TRANS_DONE)
a_resp->header_state = http_resp_header_end;
else
a_resp->header_state = http_resp_header_start;
return l_return;
}
static int
read_chunk(http_trans_conn *a_conn)
{
char *l_end_chunk_hdr = NULL;
int l_len = 0;
int i = 0;
int j = 0;
char *l_ptr = NULL;
int l_left_to_read = 0;
int l_rv = 0;
if (a_conn->chunk_len == 0)
{
/* check to make sure that the pattern is in the
buffer */
do {
if ((l_end_chunk_hdr =
http_trans_buf_has_patt(a_conn->io_buf, a_conn->io_buf_alloc,
"\r\n", 2)) == NULL)
{
l_rv = http_trans_read_into_buf(a_conn);
if (l_rv == HTTP_TRANS_ERR)
return HTTP_TRANS_ERR;
/* check to see if the remote end hung up. */
if ((l_rv == HTTP_TRANS_DONE) && (a_conn->last_read == 0))
return HTTP_TRANS_ERR;
if ((a_conn->sync == HTTP_TRANS_ASYNC) && (l_rv == HTTP_TRANS_NOT_DONE))
return HTTP_TRANS_NOT_DONE;
}
} while (l_end_chunk_hdr == NULL);
/* set the begining at the start of the buffer */
l_ptr = a_conn->io_buf;
/* eat the hex value of the chunk */
while ((l_ptr < l_end_chunk_hdr) &&
(((tolower(*l_ptr) <= 'f') && (tolower(*l_ptr) >= 'a')) ||
((*l_ptr <= '9') && (*l_ptr >= '0'))))
l_ptr++;
/* get the length of the hex number */
l_len = l_ptr - a_conn->io_buf;
if (l_len == 0)
{
a_conn->chunk_len = -1;
return HTTP_TRANS_ERR;
}
/* walk the size adding the values as you go along. */
for (i=0, j=l_len-1; i < l_len; i++, j--)
{
if ((tolower(a_conn->io_buf[i]) <= 'f') && (tolower(a_conn->io_buf[i]) >= 'a'))
a_conn->chunk_len += (tolower(a_conn->io_buf[i]) - 0x57) << (4*j);
else
a_conn->chunk_len += (tolower(a_conn->io_buf[i]) - 0x30) << (4*j);
}
/* reset the pointer past the end of the header */
http_trans_buf_clip(a_conn, l_end_chunk_hdr + 2);
}
/* check to see if it's the last chunk. If not then add it.*/
if (a_conn->chunk_len != 0)
{
/* figure out how much we need to read */
/* the + 2 is for the \r\n that always follows a chunk. */
l_left_to_read = a_conn->chunk_len - a_conn->io_buf_alloc + 2;
/* check to make sure that we actually need to read anything in. */
if (l_left_to_read > 0)
{
/* set the vars in the struct */
a_conn->io_buf_io_left = l_left_to_read;
a_conn->io_buf_io_done = 0;
/* append it */
do {
l_rv = http_trans_read_into_buf(a_conn);
if (l_rv == HTTP_TRANS_ERR)
return HTTP_TRANS_ERR;
/* check and see if the server hung up. */
if ((l_rv == HTTP_TRANS_DONE) && (a_conn->last_read == 0))
return HTTP_TRANS_ERR;
if ((a_conn->sync == HTTP_TRANS_ASYNC) && (l_rv == HTTP_TRANS_NOT_DONE))
return HTTP_TRANS_NOT_DONE;
} while (l_rv == HTTP_TRANS_NOT_DONE);
}
}
if (a_conn->io_buf_alloc >= a_conn->chunk_len + 2)
return HTTP_TRANS_DONE;
/* we only get here if there was an error. */
if (a_conn->chunk_len == 0)
return HTTP_TRANS_DONE;
return HTTP_TRANS_ERR;
}