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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 <apr_thread_cond.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_request.h"
#include "h2_session.h"
#include "h2_stream.h"
#include "h2_from_h1.h"
#include "h2_response.h"
#include "h2_task_output.h"
#include "h2_task.h"
#include "h2_util.h"
h2_task_output *h2_task_output_create(h2_task *task, apr_pool_t *pool)
{
h2_task_output *output = apr_pcalloc(pool, sizeof(h2_task_output));
if (output) {
output->task = task;
output->state = H2_TASK_OUT_INIT;
output->from_h1 = h2_from_h1_create(task->stream_id, pool);
if (!output->from_h1) {
return NULL;
}
}
return output;
}
void h2_task_output_destroy(h2_task_output *output)
{
if (output->from_h1) {
h2_from_h1_destroy(output->from_h1);
output->from_h1 = NULL;
}
}
static apr_status_t open_if_needed(h2_task_output *output, ap_filter_t *f,
apr_bucket_brigade *bb)
{
if (output->state == H2_TASK_OUT_INIT) {
h2_response *response;
output->state = H2_TASK_OUT_STARTED;
response = h2_from_h1_get_response(output->from_h1);
if (!response) {
if (f) {
/* This happens currently when ap_die(status, r) is invoked
* by a read request filter.
*/
ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, f->c,
"h2_task_output(%s): write without response "
"for %s %s %s",
output->task->id, output->task->request->method,
output->task->request->authority,
output->task->request->path);
f->c->aborted = 1;
}
if (output->task->io) {
apr_thread_cond_broadcast(output->task->io);
}
return APR_ECONNABORTED;
}
output->trailers_passed = !!response->trailers;
return h2_mplx_out_open(output->task->mplx, output->task->stream_id,
response, f, bb, output->task->io);
}
return APR_EOF;
}
static apr_table_t *get_trailers(h2_task_output *output)
{
if (!output->trailers_passed) {
h2_response *response = h2_from_h1_get_response(output->from_h1);
if (response->trailers) {
output->trailers_passed = 1;
return response->trailers;
}
}
return NULL;
}
void h2_task_output_close(h2_task_output *output)
{
open_if_needed(output, NULL, NULL);
if (output->state != H2_TASK_OUT_DONE) {
h2_mplx_out_close(output->task->mplx, output->task->stream_id,
get_trailers(output));
output->state = H2_TASK_OUT_DONE;
}
}
int h2_task_output_has_started(h2_task_output *output)
{
return output->state >= H2_TASK_OUT_STARTED;
}
/* Bring the data from the brigade (which represents the result of the
* request_rec out filter chain) into the h2_mplx for further sending
* on the master connection.
*/
apr_status_t h2_task_output_write(h2_task_output *output,
ap_filter_t* f, apr_bucket_brigade* bb)
{
apr_status_t status;
if (APR_BRIGADE_EMPTY(bb)) {
ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, f->c,
"h2_task_output(%s): empty write", output->task->id);
return APR_SUCCESS;
}
status = open_if_needed(output, f, bb);
if (status != APR_EOF) {
ap_log_cerror(APLOG_MARK, APLOG_TRACE1, status, f->c,
"h2_task_output(%s): opened and passed brigade",
output->task->id);
return status;
}
ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, f->c,
"h2_task_output(%s): write brigade", output->task->id);
return h2_mplx_out_write(output->task->mplx, output->task->stream_id,
f, bb, get_trailers(output), output->task->io);
}
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