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/* Copyright 2015 greenbytes GmbH (https://www.greenbytes.de)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <assert.h>
#include <httpd.h>
#include <http_core.h>
#include <http_log.h>
#include <http_connection.h>
#include "h2_private.h"
#include "h2_conn.h"
#include "h2_mplx.h"
#include "h2_session.h"
#include "h2_stream.h"
#include "h2_task_input.h"
#include "h2_task.h"
#include "h2_util.h"
static int is_aborted(ap_filter_t *f)
{
return (f->c->aborted);
}
static int ser_header(void *ctx, const char *name, const char *value)
{
h2_task_input *input = (h2_task_input*)ctx;
apr_brigade_printf(input->bb, NULL, NULL, "%s: %s\r\n", name, value);
return 1;
}
h2_task_input *h2_task_input_create(h2_task_env *env, apr_pool_t *pool,
apr_bucket_alloc_t *bucket_alloc)
{
h2_task_input *input = apr_pcalloc(pool, sizeof(h2_task_input));
if (input) {
input->env = env;
input->bb = NULL;
if (env->serialize_headers) {
input->bb = apr_brigade_create(pool, bucket_alloc);
apr_brigade_printf(input->bb, NULL, NULL, "%s %s HTTP/1.1\r\n",
env->method, env->path);
apr_table_do(ser_header, input, env->headers, NULL);
apr_brigade_puts(input->bb, NULL, NULL, "\r\n");
if (input->env->input_eos) {
APR_BRIGADE_INSERT_TAIL(input->bb, apr_bucket_eos_create(bucket_alloc));
}
}
else if (!input->env->input_eos) {
input->bb = apr_brigade_create(pool, bucket_alloc);
}
else {
/* We do not serialize and have eos already, no need to
* create a bucket brigade. */
}
if (APLOGcdebug(&env->c)) {
char buffer[1024];
apr_size_t len = sizeof(buffer)-1;
if (input->bb) {
apr_brigade_flatten(input->bb, buffer, &len);
}
buffer[len] = 0;
ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, &env->c,
"h2_task_input(%s): request is: %s",
env->id, buffer);
}
}
return input;
}
void h2_task_input_destroy(h2_task_input *input)
{
input->bb = NULL;
}
apr_status_t h2_task_input_read(h2_task_input *input,
ap_filter_t* f,
apr_bucket_brigade* bb,
ap_input_mode_t mode,
apr_read_type_e block,
apr_off_t readbytes)
{
apr_status_t status = APR_SUCCESS;
apr_off_t bblen = 0;
ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, f->c,
"h2_task_input(%s): read, block=%d, mode=%d, readbytes=%ld",
input->env->id, block, mode, (long)readbytes);
if (is_aborted(f)) {
ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, f->c,
"h2_task_input(%s): is aborted",
input->env->id);
return APR_ECONNABORTED;
}
if (mode == AP_MODE_INIT) {
return APR_SUCCESS;
}
if (input->bb) {
status = apr_brigade_length(input->bb, 1, &bblen);
if (status != APR_SUCCESS) {
ap_log_cerror(APLOG_MARK, APLOG_WARNING, status, f->c,
"h2_task_input(%s): brigade length fail",
input->env->id);
return status;
}
}
if ((bblen == 0) && input->env->input_eos) {
return APR_EOF;
}
while ((bblen == 0) || (mode == AP_MODE_READBYTES && bblen < readbytes)) {
/* Get more data for our stream from mplx.
*/
ap_log_cerror(APLOG_MARK, APLOG_TRACE1, status, f->c,
"h2_task_input(%s): get more data from mplx, block=%d, "
"readbytes=%ld, queued=%ld",
input->env->id, block,
(long)readbytes, (long)bblen);
/* Although we sometimes get called with APR_NONBLOCK_READs,
we seem to fill our buffer blocking. Otherwise we get EAGAIN,
return that to our caller and everyone throws up their hands,
never calling us again. */
status = h2_mplx_in_read(input->env->mplx, APR_BLOCK_READ,
input->env->stream_id, input->bb,
input->env->io);
ap_log_cerror(APLOG_MARK, APLOG_TRACE1, status, f->c,
"h2_task_input(%s): mplx in read returned",
input->env->id);
if (status != APR_SUCCESS) {
return status;
}
status = apr_brigade_length(input->bb, 1, &bblen);
if (status != APR_SUCCESS) {
return status;
}
if ((bblen == 0) && (block == APR_NONBLOCK_READ)) {
return h2_util_has_eos(input->bb, 0)? APR_EOF : APR_EAGAIN;
}
ap_log_cerror(APLOG_MARK, APLOG_TRACE1, status, f->c,
"h2_task_input(%s): mplx in read, %ld bytes in brigade",
input->env->id, (long)bblen);
}
ap_log_cerror(APLOG_MARK, APLOG_TRACE1, status, f->c,
"h2_task_input(%s): read, mode=%d, block=%d, "
"readbytes=%ld, queued=%ld",
input->env->id, mode, block,
(long)readbytes, (long)bblen);
if (!APR_BRIGADE_EMPTY(input->bb)) {
if (mode == AP_MODE_EXHAUSTIVE) {
/* return all we have */
return h2_util_move(bb, input->bb, readbytes, 0,
"task_input_read(exhaustive)");
}
else if (mode == AP_MODE_READBYTES) {
return h2_util_move(bb, input->bb, readbytes, 0,
"task_input_read(readbytes)");
}
else if (mode == AP_MODE_SPECULATIVE) {
/* return not more than was asked for */
return h2_util_copy(bb, input->bb, readbytes,
"task_input_read(speculative)");
}
else if (mode == AP_MODE_GETLINE) {
/* we are reading a single LF line, e.g. the HTTP headers */
status = apr_brigade_split_line(bb, input->bb, block,
HUGE_STRING_LEN);
if (APLOGctrace1(f->c)) {
char buffer[1024];
apr_size_t len = sizeof(buffer)-1;
apr_brigade_flatten(bb, buffer, &len);
buffer[len] = 0;
ap_log_cerror(APLOG_MARK, APLOG_TRACE1, status, f->c,
"h2_task_input(%s): getline: %s",
input->env->id, buffer);
}
return status;
}
else {
/* Hmm, well. There is mode AP_MODE_EATCRLF, but we chose not
* to support it. Seems to work. */
ap_log_cerror(APLOG_MARK, APLOG_ERR, APR_ENOTIMPL, f->c,
"h2_task_input, unsupported READ mode %d",
mode);
return APR_ENOTIMPL;
}
}
if (is_aborted(f)) {
return APR_ECONNABORTED;
}
return (block == APR_NONBLOCK_READ)? APR_EAGAIN : APR_EOF;
}
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