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/* ======================================================================
* Copyright (c) 1998-1999 The Johns Hopkins University.
* All rights reserved.
* The following code was written by Theo Schlossnagle for use in the
* Backhand project at The Center for Networking and Distributed Systems
* at The Johns Hopkins University.
* Please refer to the LICENSE file before using this software.
* ======================================================================
*/
/* The following routines were adapted shamelessly from the apache source */
static int b_getline(char *s, int n, BUFF *in, int fold) {
char *pos=s, next;
int retval, total=0;
do {
retval=ap_bgets(pos, n, in);
if (retval <= 0)
return ((retval < 0) && (total == 0)) ? -1 : total;
pos += (retval - 1);
total += retval;
n -= retval;
if (pos[0] == '\n') {
while (pos > (s + 1) && (pos[-1] == ' ' || pos[-1] == '\t'))
--pos, --total, ++n;
pos[0] = '\0';
--total;
++n;
} else
return total;
} while (fold && (retval != 1) && (n > 1)
&& (ap_blookc(&next, in) == 1)
&& ((next == ' ') || (next == '\t')));
return total;
}
static int b_get_mime_headers_out(BUFF *myconn, request_rec *r, table **t_h,
table **t_c) {
char field[DEFAULT_LIMIT_REQUEST_FIELDSIZE + 2];
char *value, *copy;
int len, numheaders=-1;
unsigned int fields_read=0;
table *tmp_headers;
table *cookie_headers;
tmp_headers = ap_make_table(r->pool, 50);
cookie_headers = ap_make_table(r->pool, 2);
*t_h = tmp_headers;
*t_c = cookie_headers;
if(b_getline(field, sizeof(field), myconn, 0)<=0) return -1;
if((value = strchr(field, ' '))!=NULL) {
r->status = atoi(value+1);
field[sizeof(field)-1] = '\0';
r->status_line = ap_pstrdup(r->pool,value+1);
}
numheaders++;
while((len = b_getline(field, sizeof(field), myconn, 1)) > 0) {
if(r->server->limit_req_fields &&
(++fields_read > r->server->limit_req_fields)) {
r->status = HTTP_BAD_REQUEST;
return numheaders;
}
if(len > r->server->limit_req_fieldsize) {
r->status = HTTP_BAD_REQUEST;
return numheaders;
}
copy = ap_palloc(r->pool, len + 1);
memcpy(copy, field, len + 1);
if(!(value = strchr(copy, ':'))) {
r->status = HTTP_BAD_REQUEST;
return numheaders;
}
value[0] = '\0';
++value;
while(value[0] == ' ' || value[0] == '\t')
++value;
if (!strcasecmp(copy, "Set-Cookie")) {
ap_table_addn(cookie_headers, copy, value);
} else {
ap_table_addn(tmp_headers, copy, value);
}
numheaders++;
}
return numheaders;
}
static long b_get_chunk_size(char *b)
{
long chunksize = 0;
while (ap_isxdigit(*b)) {
int xvalue = 0;
if (*b >= '0' && *b <= '9')
xvalue = *b - '0';
else if (*b >= 'A' && *b <= 'F')
xvalue = *b - 'A' + 0xa;
else if (*b >= 'a' && *b <= 'f')
xvalue = *b - 'a' + 0xa;
chunksize = (chunksize << 4) | xvalue;
++b;
}
return chunksize;
}
static long get_response_block(BUFF *sconn, request_rec *r, int *remaining,
char *buffer, int bufsiz)
{
int c;
long len_read, len_to_read;
long chunk_start = 0;
bufsiz -= 2;
if (*remaining == 0) { /* Start of new chunk */
chunk_start = b_getline(buffer, bufsiz, sconn, 0);
if ((chunk_start <= 0) || (chunk_start >= (bufsiz - 1))
|| !ap_isxdigit(*buffer)) {
*remaining = -1;
return -1;
}
len_to_read = b_get_chunk_size(buffer);
if(len_to_read < 0) {
r->connection->keepalive = -1;
*remaining = -1;
return -1;
}
if (len_to_read == 0) { /* Last chunk indicated, get footers */
*remaining = -1; /* Indicate footers in-progress */
}
else {
*remaining = len_to_read;
}
buffer[chunk_start++] = CR;
buffer[chunk_start++] = LF;
buffer += chunk_start;
bufsiz -= chunk_start;
}
/* When REQUEST_CHUNKED_PASS, we are */
if (*remaining == -1) { /* reading footers until empty line */
len_read = chunk_start;
while ((bufsiz > 1) &&
((len_read = b_getline(buffer, bufsiz, sconn, 1)) > 0)) {
if (len_read != (bufsiz - 1)) {
buffer[len_read++] = CR; /* Restore footer line end */
buffer[len_read++] = LF;
}
chunk_start += len_read;
buffer += len_read;
bufsiz -= len_read;
}
if (len_read < 0) {
/* keepalive = -1; */
return -2;
}
if (len_read == 0) { /* Indicates an empty line */
buffer[0] = CR;
buffer[1] = LF;
chunk_start += 2;
*remaining = -2;
}
/* r->read_length += chunk_start;*/
return chunk_start;
}
/* When REQUEST_CHUNKED_PASS, we */
if (*remaining == -2) { /* finished footers when last called */
*remaining = 0; /* so now we must signal EOF */
return 0;
}
/* Otherwise, we are in the midst of reading a chunk of data */
len_to_read = (*remaining > bufsiz) ? bufsiz : *remaining;
len_read = ap_bread(sconn, buffer, len_to_read);
if (len_read <= 0) {
return -2;
}
*remaining -= len_read;
if (*remaining == 0) { /* End of chunk, get trailing CRLF */
if ((c = ap_bgetc(sconn)) == CR) {
c = ap_bgetc(sconn);
}
if (c != LF) {
return -2;
}
buffer[len_read++] = CR;
buffer[len_read++] = LF;
}
/* r->read_length += (chunk_start + len_read);*/
return (chunk_start + len_read);
}
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