static apr_status_t serf_limit_readline(serf_bucket_t *bucket,
int acceptable, int *found,
const char **data, apr_size_t *len)
{
limit_context_t *ctx = bucket->data;
apr_status_t status;
if (!ctx->remaining) {
*len = 0;
return APR_EOF;
}
status = serf_bucket_readline(ctx->stream, acceptable, found, data, len);
if (!SERF_BUCKET_READ_ERROR(status)) {
ctx->remaining -= *len;
}
/* If we have met our limit and don't have a status, return EOF. */
if (!ctx->remaining && !status) {
status = APR_EOF;
}
return status;
}
static apr_status_t serf_aggregate_readline(serf_bucket_t *bucket,
int acceptable, int *found,
const char **data, apr_size_t *len)
{
aggregate_context_t *ctx = bucket->data;
apr_status_t status;
cleanup_aggregate(ctx, bucket->allocator);
do {
serf_bucket_t *head;
*len = 0;
if (!ctx->list) {
if (ctx->hold_open) {
return ctx->hold_open(ctx->hold_open_baton, bucket);
}
else {
return APR_EOF;
}
}
head = ctx->list->bucket;
status = serf_bucket_readline(head, acceptable, found,
data, len);
if (SERF_BUCKET_READ_ERROR(status))
return status;
if (status == APR_EOF) {
bucket_list_t *next_list;
/* head bucket is empty, move to to-be-cleaned-up list. */
next_list = ctx->list->next;
ctx->list->next = ctx->done;
ctx->done = ctx->list;
ctx->list = next_list;
/* If we have no more in our list, return EOF. */
if (!ctx->list) {
if (ctx->hold_open) {
return ctx->hold_open(ctx->hold_open_baton, bucket);
}
else {
return APR_EOF;
}
}
/* we read something, so bail out and let the appl. read again. */
if (*len)
status = APR_SUCCESS;
}
/* continue with APR_SUCCESS or APR_EOF and no data read yet. */
} while (!*len && status != APR_EAGAIN);
return status;
}
static apr_status_t serf_barrier_readline(serf_bucket_t *bucket,
int acceptable, int *found,
const char **data, apr_size_t *len)
{
barrier_context_t *ctx = bucket->data;
return serf_bucket_readline(ctx->stream, acceptable, found, data, len);
}
static apr_status_t serf_response_readline(serf_bucket_t *bucket,
int acceptable, int *found,
const char **data, apr_size_t *len)
{
response_context_t *ctx = bucket->data;
apr_status_t rv;
rv = wait_for_body(bucket, ctx);
if (rv) {
return rv;
}
/* Delegate to the stream bucket to do the readline. */
return serf_bucket_readline(ctx->body, acceptable, found, data, len);
}
static apr_status_t serf_chunk_readline(serf_bucket_t *bucket,
int acceptable, int *found,
const char **data, apr_size_t *len)
{
chunk_context_t *ctx = bucket->data;
apr_status_t status;
status = serf_bucket_readline(ctx->chunk, acceptable, found, data, len);
/* Mask EOF from aggregate bucket. */
if (APR_STATUS_IS_EOF(status) && ctx->state == STATE_CHUNK) {
status = APR_EAGAIN;
ctx->state = STATE_FETCH;
}
return status;
}
apr_status_t serf_linebuf_fetch(
serf_linebuf_t *linebuf,
serf_bucket_t *bucket,
int acceptable)
{
/* If we had a complete line, then assume the caller has used it, so
* we can now reset the state.
*/
if (linebuf->state == SERF_LINEBUF_READY) {
linebuf->state = SERF_LINEBUF_EMPTY;
/* Reset the line_used, too, so we don't have to test the state
* before using this value.
*/
linebuf->used = 0;
linebuf->line[0] = '\0';
}
while (1) {
apr_status_t status;
const char *data;
apr_size_t len;
if (linebuf->state == SERF_LINEBUF_CRLF_SPLIT) {
/* On the previous read, we received just a CR. The LF might
* be present, but the bucket couldn't see it. We need to
* examine a single character to determine how to handle the
* split CRLF.
*/
status = serf_bucket_peek(bucket, &data, &len);
if (SERF_BUCKET_READ_ERROR(status))
return status;
if (len > 0) {
if (*data == '\n') {
/* We saw the second part of CRLF. We don't need to
* save that character, so do an actual read to suck
* up that character.
*/
/* ### check status */
(void) serf_bucket_read(bucket, 1, &data, &len);
}
/* else:
* We saw the first character of the next line. Thus,
* the current line is terminated by the CR. Just
* ignore whatever we peeked at. The next reader will
* see it and handle it as appropriate.
*/
/* Whatever was read, the line is now ready for use. */
linebuf->state = SERF_LINEBUF_READY;
} else {
/* no data available, try again later. */
return APR_EAGAIN;
}
}
else {
int found;
status = serf_bucket_readline(bucket, acceptable, &found,
&data, &len);
if (SERF_BUCKET_READ_ERROR(status)) {
return status;
}
/* Some bucket types (socket) might need an extra read to find
out EOF state, so they'll return no data in that read. This
means we're done reading, return what we got. */
if (APR_STATUS_IS_EOF(status) && len == 0) {
return status;
}
if (linebuf->used + len + 1 > sizeof(linebuf->line)) {
return SERF_ERROR_LINE_TOO_LONG;
}
/* Note: our logic doesn't change for SERF_LINEBUF_PARTIAL. That
* only affects how we fill the buffer. It is a communication to
* our caller on whether the line is ready or not.
*/
/* If we didn't see a newline, then we should mark the line
* buffer as partially complete.
*/
if (found == SERF_NEWLINE_NONE) {
linebuf->state = SERF_LINEBUF_PARTIAL;
}
else if (found == SERF_NEWLINE_CRLF_SPLIT) {
linebuf->state = SERF_LINEBUF_CRLF_SPLIT;
/* Toss the partial CR. We won't ever need it. */
if (len > 0)
--len;
}
else {
/* We got a newline (of some form). We don't need it
* in the line buffer, so back up the length. Then
* mark the line as ready.
*/
len -= 1 + (found == SERF_NEWLINE_CRLF);
linebuf->state = SERF_LINEBUF_READY;
}
/* The C99 standard (7.21.1/2) requires valid data pointer
* even for zero length array for all functions unless explicitly
* stated otherwise. So don't copy data even most mempy()
* implementations have special handling for zero length copy. */
if (len > 0) {
/* ### it would be nice to avoid this copy if at all possible,
### and just return the a data/len pair to the caller. we're
### keeping it simple for now. */
memcpy(&linebuf->line[linebuf->used], data, len);
linebuf->line[linebuf->used + len] = '\0';
linebuf->used += len;
}
}
/* If we saw anything besides "success. please read again", then
* we should return that status. If the line was completed, then
* we should also return.
*/
if (status || linebuf->state == SERF_LINEBUF_READY)
return status;
/* We got APR_SUCCESS and the line buffer is not complete. Let's
* loop to read some more data.
*/
}
/* NOTREACHED */
}
