blob: 1893b12fad465474899c8c5ae18b7c1f41fb5fa1 [file] [log] [blame]
/* 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 <stddef.h>
#include <apr_atomic.h>
#include <apr_thread_cond.h>
#include <apr_strings.h>
#include <httpd.h>
#include <http_core.h>
#include <http_connection.h>
#include <http_protocol.h>
#include <http_request.h>
#include <http_log.h>
#include <http_vhost.h>
#include <util_filter.h>
#include <ap_mpm.h>
#include <mod_core.h>
#include <scoreboard.h>
#include "h2_private.h"
#include "h2.h"
#include "h2_bucket_beam.h"
#include "h2_conn.h"
#include "h2_config.h"
#include "h2_ctx.h"
#include "h2_from_h1.h"
#include "h2_h2.h"
#include "h2_mplx.h"
#include "h2_request.h"
#include "h2_session.h"
#include "h2_stream.h"
#include "h2_task.h"
#include "h2_worker.h"
#include "h2_util.h"
/*******************************************************************************
* task input handling
******************************************************************************/
static int input_ser_header(void *ctx, const char *name, const char *value)
{
h2_task *task = ctx;
apr_brigade_printf(task->input.bb, NULL, NULL, "%s: %s\r\n", name, value);
return 1;
}
static void make_chunk(h2_task *task, apr_bucket_brigade *bb,
apr_bucket *first, apr_uint64_t chunk_len,
apr_bucket *tail)
{
/* Surround the buckets [first, tail[ with new buckets carrying the
* HTTP/1.1 chunked encoding format. If tail is NULL, the chunk extends
* to the end of the brigade. */
char buffer[128];
apr_bucket *c;
int len;
len = apr_snprintf(buffer, H2_ALEN(buffer),
"%"APR_UINT64_T_HEX_FMT"\r\n", chunk_len);
c = apr_bucket_heap_create(buffer, len, NULL, bb->bucket_alloc);
APR_BUCKET_INSERT_BEFORE(first, c);
c = apr_bucket_heap_create("\r\n", 2, NULL, bb->bucket_alloc);
if (tail) {
APR_BUCKET_INSERT_BEFORE(tail, c);
}
else {
APR_BRIGADE_INSERT_TAIL(bb, c);
}
}
static apr_status_t input_handle_eos(h2_task *task, request_rec *r,
apr_bucket *b)
{
apr_status_t status = APR_SUCCESS;
apr_bucket_brigade *bb = task->input.bb;
apr_table_t *t = task->request? task->request->trailers : NULL;
if (task->input.chunked) {
task->input.tmp = apr_brigade_split_ex(bb, b, task->input.tmp);
if (t && !apr_is_empty_table(t)) {
status = apr_brigade_puts(bb, NULL, NULL, "0\r\n");
apr_table_do(input_ser_header, task, t, NULL);
status = apr_brigade_puts(bb, NULL, NULL, "\r\n");
}
else {
status = apr_brigade_puts(bb, NULL, NULL, "0\r\n\r\n");
}
APR_BRIGADE_CONCAT(bb, task->input.tmp);
}
else if (r && t && !apr_is_empty_table(t)){
/* trailers passed in directly. */
apr_table_overlap(r->trailers_in, t, APR_OVERLAP_TABLES_SET);
}
task->input.eos_written = 1;
return status;
}
static apr_status_t input_append_eos(h2_task *task, request_rec *r)
{
apr_status_t status = APR_SUCCESS;
apr_bucket_brigade *bb = task->input.bb;
apr_table_t *t = task->request? task->request->trailers : NULL;
if (task->input.chunked) {
if (t && !apr_is_empty_table(t)) {
status = apr_brigade_puts(bb, NULL, NULL, "0\r\n");
apr_table_do(input_ser_header, task, t, NULL);
status = apr_brigade_puts(bb, NULL, NULL, "\r\n");
}
else {
status = apr_brigade_puts(bb, NULL, NULL, "0\r\n\r\n");
}
}
else if (r && t && !apr_is_empty_table(t)){
/* trailers passed in directly. */
apr_table_overlap(r->trailers_in, t, APR_OVERLAP_TABLES_SET);
}
APR_BRIGADE_INSERT_TAIL(bb, apr_bucket_eos_create(bb->bucket_alloc));
task->input.eos_written = 1;
return status;
}
static apr_status_t input_read(h2_task *task, 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_bucket *b, *next, *first_data;
apr_off_t bblen = 0;
ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, f->c,
"h2_task(%s): read, mode=%d, block=%d, readbytes=%ld",
task->id, mode, block, (long)readbytes);
if (mode == AP_MODE_INIT) {
return ap_get_brigade(f->c->input_filters, bb, mode, block, readbytes);
}
if (f->c->aborted || !task->request) {
return APR_ECONNABORTED;
}
if (!task->input.bb) {
if (!task->input.eos_written) {
input_append_eos(task, f->r);
return APR_SUCCESS;
}
return APR_EOF;
}
/* Cleanup brigades from those nasty 0 length non-meta buckets
* that apr_brigade_split_line() sometimes produces. */
for (b = APR_BRIGADE_FIRST(task->input.bb);
b != APR_BRIGADE_SENTINEL(task->input.bb); b = next) {
next = APR_BUCKET_NEXT(b);
if (b->length == 0 && !APR_BUCKET_IS_METADATA(b)) {
apr_bucket_delete(b);
}
}
while (APR_BRIGADE_EMPTY(task->input.bb) && !task->input.eos) {
/* Get more input data for our request. */
ap_log_cerror(APLOG_MARK, APLOG_TRACE1, status, f->c,
"h2_task(%s): get more data from mplx, block=%d, "
"readbytes=%ld, queued=%ld",
task->id, block, (long)readbytes, (long)bblen);
/* Override the block mode we get called with depending on the input's
* setting. */
if (task->input.beam) {
status = h2_beam_receive(task->input.beam, task->input.bb, block,
H2MIN(readbytes, 32*1024));
}
else {
status = APR_EOF;
}
ap_log_cerror(APLOG_MARK, APLOG_TRACE2, status, f->c,
"h2_task(%s): read returned", task->id);
if (APR_STATUS_IS_EAGAIN(status)
&& (mode == AP_MODE_GETLINE || block == APR_BLOCK_READ)) {
/* chunked input handling does not seem to like it if we
* return with APR_EAGAIN from a GETLINE read...
* upload 100k test on test-ser.example.org hangs */
status = APR_SUCCESS;
}
else if (APR_STATUS_IS_EOF(status)) {
task->input.eos = 1;
}
else if (status != APR_SUCCESS) {
return status;
}
/* Inspect the buckets received, detect EOS and apply
* chunked encoding if necessary */
h2_util_bb_log(f->c, task->stream_id, APLOG_TRACE2,
"input.beam recv raw", task->input.bb);
first_data = NULL;
bblen = 0;
for (b = APR_BRIGADE_FIRST(task->input.bb);
b != APR_BRIGADE_SENTINEL(task->input.bb); b = next) {
next = APR_BUCKET_NEXT(b);
if (APR_BUCKET_IS_METADATA(b)) {
if (first_data && task->input.chunked) {
make_chunk(task, task->input.bb, first_data, bblen, b);
first_data = NULL;
bblen = 0;
}
if (APR_BUCKET_IS_EOS(b)) {
task->input.eos = 1;
input_handle_eos(task, f->r, b);
h2_util_bb_log(f->c, task->stream_id, APLOG_TRACE2,
"input.bb after handle eos",
task->input.bb);
}
}
else if (b->length == 0) {
apr_bucket_delete(b);
}
else {
if (!first_data) {
first_data = b;
}
bblen += b->length;
}
}
if (first_data && task->input.chunked) {
make_chunk(task, task->input.bb, first_data, bblen, NULL);
}
if (h2_task_logio_add_bytes_in) {
h2_task_logio_add_bytes_in(f->c, bblen);
}
}
if (task->input.eos) {
if (!task->input.eos_written) {
input_append_eos(task, f->r);
}
if (APR_BRIGADE_EMPTY(task->input.bb)) {
return APR_EOF;
}
}
h2_util_bb_log(f->c, task->stream_id, APLOG_TRACE2,
"task_input.bb", task->input.bb);
if (APR_BRIGADE_EMPTY(task->input.bb)) {
ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, f->c,
"h2_task(%s): no data", task->id);
return (block == APR_NONBLOCK_READ)? APR_EAGAIN : APR_EOF;
}
if (mode == AP_MODE_EXHAUSTIVE) {
/* return all we have */
APR_BRIGADE_CONCAT(bb, task->input.bb);
}
else if (mode == AP_MODE_READBYTES) {
status = h2_brigade_concat_length(bb, task->input.bb, readbytes);
}
else if (mode == AP_MODE_SPECULATIVE) {
status = h2_brigade_copy_length(bb, task->input.bb, readbytes);
}
else if (mode == AP_MODE_GETLINE) {
/* we are reading a single LF line, e.g. the HTTP headers.
* this has the nasty side effect to split the bucket, even
* though it ends with CRLF and creates a 0 length bucket */
status = apr_brigade_split_line(bb, task->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(%s): getline: %s",
task->id, buffer);
}
}
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,
APLOGNO(02942)
"h2_task, unsupported READ mode %d", mode);
status = APR_ENOTIMPL;
}
if (APLOGctrace1(f->c)) {
apr_brigade_length(bb, 0, &bblen);
ap_log_cerror(APLOG_MARK, APLOG_TRACE1, status, f->c,
"h2_task(%s): return %ld data bytes",
task->id, (long)bblen);
}
return status;
}
/*******************************************************************************
* task output handling
******************************************************************************/
static apr_status_t open_response(h2_task *task)
{
h2_response *response;
response = h2_from_h1_get_response(task->output.from_h1);
if (!response) {
/* This happens currently when ap_die(status, r) is invoked
* by a read request filter. */
ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, task->c, APLOGNO(03204)
"h2_task(%s): write without response for %s %s %s",
task->id,
task->request->method,
task->request->authority,
task->request->path);
task->c->aborted = 1;
return APR_ECONNABORTED;
}
if (h2_task_logio_add_bytes_out) {
/* count headers as if we'd do a HTTP/1.1 serialization */
task->output.written = h2_util_table_bytes(response->headers, 3)+1;
h2_task_logio_add_bytes_out(task->c, task->output.written);
}
ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, task->c, APLOGNO(03348)
"h2_task(%s): open response to %s %s %s",
task->id, task->request->method,
task->request->authority,
task->request->path);
return h2_mplx_out_open(task->mplx, task->stream_id, response);
}
static apr_status_t send_out(h2_task *task, apr_bucket_brigade* bb)
{
apr_off_t written, left;
apr_status_t status;
apr_brigade_length(bb, 0, &written);
ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, task->c,
"h2_task(%s): write response body (%ld bytes)",
task->id, (long)written);
status = h2_beam_send(task->output.beam, bb,
task->blocking? APR_BLOCK_READ
: APR_NONBLOCK_READ);
if (APR_STATUS_IS_EAGAIN(status)) {
apr_brigade_length(bb, 0, &left);
written -= left;
status = APR_SUCCESS;
}
if (status == APR_SUCCESS) {
task->output.written += written;
if (h2_task_logio_add_bytes_out) {
h2_task_logio_add_bytes_out(task->c, written);
}
}
return status;
}
/* 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.
*/
static apr_status_t output_write(h2_task *task, ap_filter_t* f,
apr_bucket_brigade* bb)
{
apr_bucket *b;
apr_status_t status = APR_SUCCESS;
int flush = 0;
if (APR_BRIGADE_EMPTY(bb)) {
ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, task->c,
"h2_task(%s): empty write", task->id);
return APR_SUCCESS;
}
if (task->frozen) {
h2_util_bb_log(task->c, task->stream_id, APLOG_TRACE2,
"frozen task output write, ignored", bb);
while (!APR_BRIGADE_EMPTY(bb)) {
b = APR_BRIGADE_FIRST(bb);
if (AP_BUCKET_IS_EOR(b)) {
APR_BUCKET_REMOVE(b);
task->eor = b;
}
else {
apr_bucket_delete(b);
}
}
return APR_SUCCESS;
}
if (!task->output.beam) {
h2_beam_create(&task->output.beam, task->pool,
task->stream_id, "output", 0);
if (task->output.copy_files) {
ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, task->c,
"h2_task(%s): copy_files on", task->id);
h2_beam_on_file_beam(task->output.beam, h2_beam_no_files, NULL);
}
}
/* Attempt to write saved brigade first */
if (task->output.bb && !APR_BRIGADE_EMPTY(task->output.bb)) {
status = send_out(task, task->output.bb);
if (status != APR_SUCCESS) {
return status;
}
}
/* If there is nothing saved (anymore), try to write the brigade passed */
if ((!task->output.bb || APR_BRIGADE_EMPTY(task->output.bb))
&& !APR_BRIGADE_EMPTY(bb)) {
/* check if we have a flush before the end-of-request */
if (!task->output.response_open) {
for (b = APR_BRIGADE_FIRST(bb);
b != APR_BRIGADE_SENTINEL(bb);
b = APR_BUCKET_NEXT(b)) {
if (AP_BUCKET_IS_EOR(b)) {
break;
}
else if (APR_BUCKET_IS_FLUSH(b)) {
flush = 1;
}
}
}
status = send_out(task, bb);
if (status != APR_SUCCESS) {
return status;
}
}
/* If the passed brigade is not empty, save it before return */
if (!APR_BRIGADE_EMPTY(bb)) {
ap_log_cerror(APLOG_MARK, APLOG_DEBUG, status, task->c, APLOGNO(03405)
"h2_task(%s): could not write all, saving brigade",
task->id);
if (!task->output.bb) {
task->output.bb = apr_brigade_create(task->pool,
task->c->bucket_alloc);
}
return ap_save_brigade(f, &task->output.bb, &bb, task->pool);
}
if (!task->output.response_open
&& (flush || h2_beam_get_mem_used(task->output.beam) > (32*1024))) {
/* if we have enough buffered or we got a flush bucket, open
* the response now. */
status = open_response(task);
task->output.response_open = 1;
}
return status;
}
static apr_status_t output_finish(h2_task *task)
{
apr_status_t status = APR_SUCCESS;
if (!task->output.response_open) {
status = open_response(task);
task->output.response_open = 1;
}
return status;
}
/*******************************************************************************
* task slave connection filters
******************************************************************************/
static apr_status_t h2_filter_stream_input(ap_filter_t* filter,
apr_bucket_brigade* brigade,
ap_input_mode_t mode,
apr_read_type_e block,
apr_off_t readbytes)
{
h2_task *task = h2_ctx_cget_task(filter->c);
AP_DEBUG_ASSERT(task);
return input_read(task, filter, brigade, mode, block, readbytes);
}
static apr_status_t h2_filter_stream_output(ap_filter_t* filter,
apr_bucket_brigade* brigade)
{
h2_task *task = h2_ctx_cget_task(filter->c);
AP_DEBUG_ASSERT(task);
return output_write(task, filter, brigade);
}
static apr_status_t h2_filter_read_response(ap_filter_t* filter,
apr_bucket_brigade* bb)
{
h2_task *task = h2_ctx_cget_task(filter->c);
AP_DEBUG_ASSERT(task);
if (!task->output.from_h1) {
return APR_ECONNABORTED;
}
return h2_from_h1_read_response(task->output.from_h1, filter, bb);
}
/*******************************************************************************
* task things
******************************************************************************/
void h2_task_set_response(h2_task *task, h2_response *response)
{
AP_DEBUG_ASSERT(response);
AP_DEBUG_ASSERT(!task->response);
/* we used to clone the response into out own pool. But
* we have much tighter control over the EOR bucket nowadays,
* so just use the instance given */
task->response = response;
if (response->rst_error) {
h2_task_rst(task, response->rst_error);
}
}
int h2_task_can_redo(h2_task *task) {
if (task->submitted
|| (task->input.beam && h2_beam_was_received(task->input.beam))
|| !task->request) {
/* cannot repeat that. */
return 0;
}
return (!strcmp("GET", task->request->method)
|| !strcmp("HEAD", task->request->method)
|| !strcmp("OPTIONS", task->request->method));
}
void h2_task_redo(h2_task *task)
{
task->response = NULL;
task->rst_error = 0;
}
void h2_task_rst(h2_task *task, int error)
{
task->rst_error = error;
if (task->input.beam) {
h2_beam_abort(task->input.beam);
}
if (task->output.beam) {
h2_beam_abort(task->output.beam);
}
if (task->c) {
task->c->aborted = 1;
}
}
/*******************************************************************************
* Register various hooks
*/
static const char *const mod_ssl[] = { "mod_ssl.c", NULL};
static int h2_task_pre_conn(conn_rec* c, void *arg);
static int h2_task_process_conn(conn_rec* c);
APR_OPTIONAL_FN_TYPE(ap_logio_add_bytes_in) *h2_task_logio_add_bytes_in;
APR_OPTIONAL_FN_TYPE(ap_logio_add_bytes_out) *h2_task_logio_add_bytes_out;
void h2_task_register_hooks(void)
{
/* This hook runs on new connections before mod_ssl has a say.
* Its purpose is to prevent mod_ssl from touching our pseudo-connections
* for streams.
*/
ap_hook_pre_connection(h2_task_pre_conn,
NULL, mod_ssl, APR_HOOK_FIRST);
/* When the connection processing actually starts, we might
* take over, if the connection is for a task.
*/
ap_hook_process_connection(h2_task_process_conn,
NULL, NULL, APR_HOOK_FIRST);
ap_register_output_filter("H2_RESPONSE", h2_response_output_filter,
NULL, AP_FTYPE_PROTOCOL);
ap_register_input_filter("H2_TO_H1", h2_filter_stream_input,
NULL, AP_FTYPE_NETWORK);
ap_register_output_filter("H1_TO_H2", h2_filter_stream_output,
NULL, AP_FTYPE_NETWORK);
ap_register_output_filter("H1_TO_H2_RESP", h2_filter_read_response,
NULL, AP_FTYPE_PROTOCOL);
ap_register_output_filter("H2_TRAILERS", h2_response_trailers_filter,
NULL, AP_FTYPE_PROTOCOL);
}
/* post config init */
apr_status_t h2_task_init(apr_pool_t *pool, server_rec *s)
{
h2_task_logio_add_bytes_in = APR_RETRIEVE_OPTIONAL_FN(ap_logio_add_bytes_in);
h2_task_logio_add_bytes_out = APR_RETRIEVE_OPTIONAL_FN(ap_logio_add_bytes_out);
return APR_SUCCESS;
}
static int h2_task_pre_conn(conn_rec* c, void *arg)
{
h2_ctx *ctx;
if (!c->master) {
return OK;
}
ctx = h2_ctx_get(c, 0);
(void)arg;
if (h2_ctx_is_task(ctx)) {
ap_log_cerror(APLOG_MARK, APLOG_TRACE2, 0, c,
"h2_h2, pre_connection, found stream task");
/* Add our own, network level in- and output filters.
*/
ap_add_input_filter("H2_TO_H1", NULL, NULL, c);
ap_add_output_filter("H1_TO_H2", NULL, NULL, c);
}
return OK;
}
h2_task *h2_task_create(conn_rec *c, const h2_request *req,
h2_bucket_beam *input, h2_mplx *mplx)
{
apr_pool_t *pool;
h2_task *task;
apr_pool_create(&pool, c->pool);
task = apr_pcalloc(pool, sizeof(h2_task));
if (task == NULL) {
ap_log_cerror(APLOG_MARK, APLOG_ERR, APR_ENOMEM, c,
APLOGNO(02941) "h2_task(%ld-%d): create stream task",
c->id, req->id);
return NULL;
}
task->id = apr_psprintf(pool, "%ld-%d", c->id, req->id);
task->stream_id = req->id;
task->c = c;
task->mplx = mplx;
task->c->keepalives = mplx->c->keepalives;
task->pool = pool;
task->request = req;
task->ser_headers = req->serialize;
task->blocking = 1;
task->input.beam = input;
apr_thread_cond_create(&task->cond, pool);
h2_ctx_create_for(c, task);
return task;
}
void h2_task_destroy(h2_task *task)
{
if (task->output.beam) {
h2_beam_destroy(task->output.beam);
task->output.beam = NULL;
}
if (task->eor) {
apr_bucket_destroy(task->eor);
}
if (task->pool) {
apr_pool_destroy(task->pool);
}
}
void h2_task_set_io_blocking(h2_task *task, int blocking)
{
task->blocking = blocking;
}
apr_status_t h2_task_do(h2_task *task, apr_thread_t *thread)
{
AP_DEBUG_ASSERT(task);
task->input.block = APR_BLOCK_READ;
task->input.chunked = task->request->chunked;
task->input.eos = !task->request->body;
if (task->input.eos && !task->input.chunked && !task->ser_headers) {
/* We do not serialize/chunk and have eos already, no need to
* create a bucket brigade. */
task->input.bb = NULL;
task->input.eos_written = 1;
}
else {
task->input.bb = apr_brigade_create(task->pool, task->c->bucket_alloc);
if (task->ser_headers) {
ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, task->c,
"h2_task(%s): serialize request %s %s",
task->id, task->request->method, task->request->path);
apr_brigade_printf(task->input.bb, NULL,
NULL, "%s %s HTTP/1.1\r\n",
task->request->method, task->request->path);
apr_table_do(input_ser_header, task, task->request->headers, NULL);
apr_brigade_puts(task->input.bb, NULL, NULL, "\r\n");
}
if (task->input.eos) {
input_append_eos(task, NULL);
}
}
task->output.from_h1 = h2_from_h1_create(task->stream_id, task->pool);
ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, task->c,
"h2_task(%s): process connection", task->id);
task->c->current_thread = thread;
ap_run_process_connection(task->c);
if (task->frozen) {
ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, task->c,
"h2_task(%s): process_conn returned frozen task",
task->id);
/* cleanup delayed */
return APR_EAGAIN;
}
else {
ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, task->c,
"h2_task(%s): processing done", task->id);
return output_finish(task);
}
}
static apr_status_t h2_task_process_request(h2_task *task, conn_rec *c)
{
const h2_request *req = task->request;
conn_state_t *cs = c->cs;
request_rec *r;
ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, c,
"h2_task(%s): create request_rec", task->id);
r = h2_request_create_rec(req, c);
if (r && (r->status == HTTP_OK)) {
ap_update_child_status(c->sbh, SERVER_BUSY_WRITE, r);
if (cs) {
cs->state = CONN_STATE_HANDLER;
}
ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, c,
"h2_task(%s): start process_request", task->id);
ap_process_request(r);
if (task->frozen) {
ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, c,
"h2_task(%s): process_request frozen", task->id);
}
ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, c,
"h2_task(%s): process_request done", task->id);
/* After the call to ap_process_request, the
* request pool will have been deleted. We set
* r=NULL here to ensure that any dereference
* of r that might be added later in this function
* will result in a segfault immediately instead
* of nondeterministic failures later.
*/
if (cs)
cs->state = CONN_STATE_WRITE_COMPLETION;
r = NULL;
}
else if (!r) {
ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, c,
"h2_task(%s): create request_rec failed, r=NULL", task->id);
}
else {
ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, c,
"h2_task(%s): create request_rec failed, r->status=%d",
task->id, r->status);
}
return APR_SUCCESS;
}
static int h2_task_process_conn(conn_rec* c)
{
h2_ctx *ctx;
if (!c->master) {
return DECLINED;
}
ctx = h2_ctx_get(c, 0);
if (h2_ctx_is_task(ctx)) {
if (!ctx->task->ser_headers) {
ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, c,
"h2_h2, processing request directly");
h2_task_process_request(ctx->task, c);
return DONE;
}
ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, c,
"h2_task(%s), serialized handling", ctx->task->id);
}
else {
ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, c,
"slave_conn(%ld): has no task", c->id);
}
return DECLINED;
}
apr_status_t h2_task_freeze(h2_task *task)
{
if (!task->frozen) {
task->frozen = 1;
ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, task->c, APLOGNO(03406)
"h2_task(%s), frozen", task->id);
}
return APR_SUCCESS;
}
apr_status_t h2_task_thaw(h2_task *task)
{
if (task->frozen) {
task->frozen = 0;
ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, task->c, APLOGNO(03407)
"h2_task(%s), thawed", task->id);
}
task->detached = 1;
return APR_SUCCESS;
}
int h2_task_is_detached(h2_task *task)
{
return task->detached;
}