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http-server-request.c
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http-server-request.c
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/* Copyright (c) 2013-2017 Dovecot authors, see the included COPYING file */
#include "lib.h"
#include "ioloop.h"
#include "ostream.h"
#include "istream-private.h"
#include "http-server-private.h"
/*
* Logging
*/
static inline void
http_server_request_debug(struct http_server_request *req,
const char *format, ...) ATTR_FORMAT(2, 3);
static inline void
http_server_request_debug(struct http_server_request *req,
const char *format, ...)
{
struct http_server *server = req->server;
va_list args;
if (server->set.debug) {
va_start(args, format);
i_debug("http-server: request %s: %s",
http_server_request_label(req),
t_strdup_vprintf(format, args));
va_end(args);
}
}
/*
* Request
*/
struct http_server_request *
http_server_request_new(struct http_server_connection *conn)
{
static unsigned int id_counter = 0;
pool_t pool;
struct http_server_request *req;
pool = pool_alloconly_create(MEMPOOL_GROWING"http_server_request", 4096);
req = p_new(pool, struct http_server_request, 1);
req->pool = pool;
req->refcount = 1;
req->conn = conn;
req->server = conn->server;
req->id = ++id_counter;
http_server_connection_add_request(conn, req);
return req;
}
void http_server_request_ref(struct http_server_request *req)
{
i_assert(req->refcount > 0);
req->refcount++;
}
bool http_server_request_unref(struct http_server_request **_req)
{
struct http_server_request *req = *_req;
struct http_server_connection *conn = req->conn;
i_assert(req->refcount > 0);
*_req = NULL;
if (--req->refcount > 0)
return TRUE;
http_server_request_debug(req, "Free");
if (req->state < HTTP_SERVER_REQUEST_STATE_FINISHED) {
req->state = HTTP_SERVER_REQUEST_STATE_ABORTED;
http_server_connection_remove_request(conn, req);
}
if (req->destroy_callback != NULL) {
req->destroy_callback(req->destroy_context);
req->destroy_callback = NULL;
}
if (req->response != NULL)
http_server_response_free(req->response);
pool_unref(&req->pool);
return FALSE;
}
void http_server_request_destroy(struct http_server_request **_req)
{
struct http_server_request *req = *_req;
struct http_server *server = req->server;
http_server_request_debug(req, "Destroy");
/* just make sure the request ends in a proper state */
if (req->state < HTTP_SERVER_REQUEST_STATE_FINISHED)
req->state = HTTP_SERVER_REQUEST_STATE_ABORTED;
if (server->ioloop)
io_loop_stop(server->ioloop);
if (req->delay_destroy) {
req->destroy_pending = TRUE;
} else if (req->destroy_callback != NULL) {
void (*callback)(void *) = req->destroy_callback;
req->destroy_callback = NULL;
callback(req->destroy_context);
}
http_server_request_unref(_req);
}
void http_server_request_set_destroy_callback(struct http_server_request *req,
void (*callback)(void *),
void *context)
{
req->destroy_callback = callback;
req->destroy_context = context;
}
void http_server_request_abort(struct http_server_request **_req,
const char *reason)
{
struct http_server_request *req = *_req;
struct http_server_connection *conn = req->conn;
if (req->state >= HTTP_SERVER_REQUEST_STATE_FINISHED)
return;
http_server_request_debug(req, "Abort");
req->conn = NULL;
if (req->state < HTTP_SERVER_REQUEST_STATE_FINISHED) {
if (conn != NULL) {
http_server_connection_remove_request(conn, req);
if (!conn->closed) {
/* send best-effort response if appropriate */
if (!conn->output_locked &&
req->state >= HTTP_SERVER_REQUEST_STATE_PROCESSING &&
req->state < HTTP_SERVER_REQUEST_STATE_SENT_RESPONSE) {
static const char *response =
"HTTP/1.1 500 Internal Server Error\r\n"
"Content-Length: 0\r\n"
"\r\n";
(void)o_stream_send(conn->conn.output,
response, strlen(response));
}
/* close the connection */
http_server_connection_close(&conn, reason);
}
}
req->state = HTTP_SERVER_REQUEST_STATE_ABORTED;
}
if (req->response != NULL &&
!req->response->payload_blocking) {
http_server_response_free(req->response);
req->response = NULL;
}
http_server_request_destroy(_req);
}
const struct http_request *
http_server_request_get(struct http_server_request *req)
{
return &req->req;
}
pool_t
http_server_request_get_pool(struct http_server_request *req)
{
return req->pool;
}
struct http_server_response *
http_server_request_get_response(struct http_server_request *req)
{
return req->response;
}
int http_server_request_get_auth(struct http_server_request *req,
struct http_auth_credentials *credentials)
{
const char *auth;
auth = http_request_header_get(&req->req, "Authorization");
if (auth == NULL)
return 0;
if (http_auth_parse_credentials
((const unsigned char *)auth, strlen(auth), credentials) < 0)
return -1;
return 1;
}
bool http_server_request_is_finished(struct http_server_request *req)
{
return req->response != NULL ||
req->state == HTTP_SERVER_REQUEST_STATE_ABORTED;
}
void http_server_request_halt_payload(struct http_server_request *req)
{
i_assert(req->state <= HTTP_SERVER_REQUEST_STATE_QUEUED);
req->payload_halted = TRUE;
}
void http_server_request_continue_payload(struct http_server_request *req)
{
i_assert(req->state <= HTTP_SERVER_REQUEST_STATE_QUEUED);
req->payload_halted = FALSE;
if (req->req.expect_100_continue && !req->sent_100_continue)
http_server_connection_trigger_responses(req->conn);
}
void http_server_request_ready_to_respond(struct http_server_request *req)
{
http_server_request_debug(req, "Ready to respond");
req->state = HTTP_SERVER_REQUEST_STATE_READY_TO_RESPOND;
http_server_connection_trigger_responses(req->conn);
}
void http_server_request_submit_response(struct http_server_request *req)
{
struct http_server_connection *conn = req->conn;
i_assert(conn != NULL && req->response != NULL && req->response->submitted);
switch (req->state) {
case HTTP_SERVER_REQUEST_STATE_NEW:
case HTTP_SERVER_REQUEST_STATE_QUEUED:
case HTTP_SERVER_REQUEST_STATE_PAYLOAD_IN:
case HTTP_SERVER_REQUEST_STATE_PROCESSING:
if (!http_server_request_is_complete(req)) {
http_server_request_debug(req, "Not ready to respond");
req->state = HTTP_SERVER_REQUEST_STATE_SUBMITTED_RESPONSE;
break;
}
http_server_request_ready_to_respond(req);
break;
case HTTP_SERVER_REQUEST_STATE_ABORTED:
break;
default:
i_unreached();
}
}
void http_server_request_finished(struct http_server_request *req)
{
struct http_server_connection *conn = req->conn;
struct http_server_response *resp = req->response;
http_server_tunnel_callback_t tunnel_callback = resp->tunnel_callback;
void *tunnel_context = resp->tunnel_context;
http_server_request_debug(req, "Finished");
i_assert(req->state < HTTP_SERVER_REQUEST_STATE_FINISHED);
req->state = HTTP_SERVER_REQUEST_STATE_FINISHED;
http_server_connection_remove_request(conn, req);
conn->stats.response_count++;
if (tunnel_callback == NULL && (req->req.connection_close || resp->close)) {
if (resp->close) {
http_server_connection_close(&conn,
t_strdup_printf("Server closed connection: %u %s",
resp->status, resp->reason));
} else {
http_server_connection_close(&conn,
"Client requested connection close");
}
http_server_request_destroy(&req);
return;
}
http_server_request_destroy(&req);
if (tunnel_callback != NULL) {
http_server_connection_tunnel(&conn, tunnel_callback, tunnel_context);
return;
}
http_server_connection_trigger_responses(conn);
}
static struct http_server_response *
http_server_request_create_fail_response(struct http_server_request *req,
unsigned int status, const char *reason)
{
struct http_server_response *resp;
req->failed = TRUE;
i_assert(status / 100 != 1 && status != 204 && status != 304);
resp = http_server_response_create(req, status, reason);
if (!http_request_method_is(&req->req, "HEAD")) {
http_server_response_add_header
(resp, "Content-Type", "text/plain; charset=utf-8");
reason = t_strconcat(reason, "\r\n", NULL);
http_server_response_set_payload_data
(resp, (const unsigned char *)reason, strlen(reason));
}
return resp;
}
static void
http_server_request_fail_full(struct http_server_request *req,
unsigned int status, const char *reason, bool close)
{
struct http_server_response *resp;
req->failed = TRUE;
resp = http_server_request_create_fail_response(req, status, reason);
if (close)
http_server_response_submit_close(resp);
else
http_server_response_submit(resp);
}
void http_server_request_fail(struct http_server_request *req,
unsigned int status, const char *reason)
{
http_server_request_fail_full(req, status, reason,
req->conn->input_broken);
}
void http_server_request_fail_close(struct http_server_request *req,
unsigned int status, const char *reason)
{
http_server_request_fail_full(req, status, reason, TRUE);
}
void http_server_request_fail_auth(struct http_server_request *req,
const char *reason, const struct http_auth_challenge *chlng)
{
struct http_server_response *resp;
req->failed = TRUE;
if (reason == NULL)
reason = "Unauthenticated";
resp = http_server_request_create_fail_response(req, 401, reason);
http_server_response_add_auth(resp, chlng);
http_server_response_submit(resp);
}
void http_server_request_fail_auth_basic(struct http_server_request *req,
const char *reason, const char *realm)
{
struct http_auth_challenge chlng;
http_auth_basic_challenge_init(&chlng, realm);
http_server_request_fail_auth(req, reason, &chlng);
}
/*
* Payload input stream
*/
struct http_server_istream {
struct istream_private istream;
struct http_server_request *req;
ssize_t read_status;
};
static void
http_server_istream_switch_ioloop(struct istream_private *stream)
{
struct http_server_istream *hsristream =
(struct http_server_istream *)stream;
if (hsristream->istream.istream.blocking)
return;
http_server_connection_switch_ioloop(hsristream->req->conn);
}
static void
http_server_istream_read_any(struct http_server_istream *hsristream)
{
struct istream_private *stream = &hsristream->istream;
struct http_server *server = hsristream->req->server;
ssize_t ret;
if ((ret=i_stream_read_copy_from_parent
(&stream->istream)) > 0) {
hsristream->read_status = ret;
io_loop_stop(server->ioloop);
}
}
static ssize_t
http_server_istream_read(struct istream_private *stream)
{
struct http_server_istream *hsristream =
(struct http_server_istream *)stream;
struct http_server_request *req = hsristream->req;
struct http_server *server;
struct http_server_connection *conn;
bool blocking = stream->istream.blocking;
ssize_t ret;
if (req == NULL) {
/* request already gone (we shouldn't get here) */
stream->istream.stream_errno = EINVAL;
return -1;
}
i_stream_seek(stream->parent, stream->parent_start_offset +
stream->istream.v_offset);
server = hsristream->req->server;
conn = hsristream->req->conn;
ret = i_stream_read_copy_from_parent(&stream->istream);
if (ret == 0 && blocking) {
struct ioloop *prev_ioloop = current_ioloop;
struct io *io;
http_server_connection_ref(conn);
http_server_request_ref(req);
i_assert(server->ioloop == NULL);
server->ioloop = io_loop_create();
http_server_connection_switch_ioloop(conn);
if (blocking && req->req.expect_100_continue &&
!req->sent_100_continue)
http_server_connection_trigger_responses(conn);
hsristream->read_status = 0;
io = io_add_istream(&stream->istream,
http_server_istream_read_any, hsristream);
while (req->state < HTTP_SERVER_REQUEST_STATE_FINISHED &&
hsristream->read_status == 0) {
io_loop_run(server->ioloop);
}
io_remove(&io);
io_loop_set_current(prev_ioloop);
http_server_connection_switch_ioloop(conn);
io_loop_set_current(server->ioloop);
io_loop_destroy(&server->ioloop);
ret = hsristream->read_status;
if (!http_server_request_unref(&req))
hsristream->req = NULL;
http_server_connection_unref(&conn);
}
return ret;
}
static void
http_server_istream_destroy(struct iostream_private *stream)
{
struct http_server_istream *hsristream =
(struct http_server_istream *)stream;
uoff_t v_offset;
v_offset = hsristream->istream.parent_start_offset +
hsristream->istream.istream.v_offset;
if (hsristream->istream.parent->seekable ||
v_offset > hsristream->istream.parent->v_offset) {
/* get to same position in parent stream */
i_stream_seek(hsristream->istream.parent, v_offset);
}
i_stream_unref(&hsristream->istream.parent);
}
struct istream *
http_server_request_get_payload_input(struct http_server_request *req,
bool blocking)
{
struct http_server_istream *hsristream;
struct istream *payload = req->req.payload;
i_assert(req->payload_input == NULL);
hsristream = i_new(struct http_server_istream, 1);
hsristream->req = req;
hsristream->istream.max_buffer_size =
payload->real_stream->max_buffer_size;
hsristream->istream.stream_size_passthrough = TRUE;
hsristream->istream.read = http_server_istream_read;
hsristream->istream.switch_ioloop = http_server_istream_switch_ioloop;
hsristream->istream.iostream.destroy = http_server_istream_destroy;
hsristream->istream.istream.readable_fd = FALSE;
hsristream->istream.istream.blocking = blocking;
hsristream->istream.istream.seekable = FALSE;
req->payload_input = i_stream_create
(&hsristream->istream, payload, i_stream_get_fd(payload));
i_stream_unref(&req->req.payload);
return req->payload_input;
}