summaryrefslogtreecommitdiffstats
path: root/web/server/h2o/streaming.c
diff options
context:
space:
mode:
Diffstat (limited to 'web/server/h2o/streaming.c')
-rw-r--r--web/server/h2o/streaming.c382
1 files changed, 0 insertions, 382 deletions
diff --git a/web/server/h2o/streaming.c b/web/server/h2o/streaming.c
deleted file mode 100644
index 063e487af..000000000
--- a/web/server/h2o/streaming.c
+++ /dev/null
@@ -1,382 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-or-later
-
-#include "streaming.h"
-#include "connlist.h"
-#include "h2o_utils.h"
-#include "streaming/common.h"
-
-static int pending_write_reqs = 0;
-
-#define H2O2STREAM_BUF_SIZE (1024 * 1024)
-
-// h2o_stream_conn_t related functions
-void h2o_stream_conn_t_init(h2o_stream_conn_t *conn)
-{
- memset(conn, 0, sizeof(*conn));
- conn->rx = rbuf_create(H2O2STREAM_BUF_SIZE);
- conn->tx = rbuf_create(H2O2STREAM_BUF_SIZE);
-
- pthread_mutex_init(&conn->rx_buf_lock, NULL);
- pthread_mutex_init(&conn->tx_buf_lock, NULL);
- pthread_cond_init(&conn->rx_buf_cond, NULL);
- // no need to check for NULL as rbuf_create uses mallocz internally
-}
-
-void h2o_stream_conn_t_destroy(h2o_stream_conn_t *conn)
-{
- rbuf_free(conn->rx);
- rbuf_free(conn->tx);
-
- freez(conn->url);
- freez(conn->user_agent);
-
- pthread_mutex_destroy(&conn->rx_buf_lock);
- pthread_mutex_destroy(&conn->tx_buf_lock);
- pthread_cond_destroy(&conn->rx_buf_cond);
-}
-
-// streaming upgrade related functions
-int is_streaming_handshake(h2o_req_t *req)
-{
- /* method */
- if (!h2o_memis(req->input.method.base, req->input.method.len, H2O_STRLIT("GET")))
- return 1;
-
- if (!h2o_memis(req->path_normalized.base, req->path_normalized.len, H2O_STRLIT(NETDATA_STREAM_URL))) {
- return 1;
- }
-
- /* upgrade header */
- if (req->upgrade.base == NULL || !h2o_lcstris(req->upgrade.base, req->upgrade.len, H2O_STRLIT(NETDATA_STREAM_PROTO_NAME)))
- return 1;
-
- // TODO consider adding some key in form of random number
- // to prevent caching on route especially if TLS is not used
- // e.g. client sends random number
- // server replies with it xored
-
- return 0;
-}
-
-static void stream_on_close(h2o_stream_conn_t *conn);
-void stream_process(h2o_stream_conn_t *conn, int initial);
-
-void stream_on_complete(void *user_data, h2o_socket_t *sock, size_t reqsize)
-{
- h2o_stream_conn_t *conn = user_data;
-
- /* close the connection on error */
- if (sock == NULL) {
- stream_on_close(conn);
- return;
- }
-
- conn->sock = sock;
- sock->data = conn;
-
- conn_list_insert(&conn_list, conn);
-
- h2o_buffer_consume(&sock->input, reqsize);
- stream_process(conn, 1);
-}
-
-// handling of active streams
-static void stream_on_close(h2o_stream_conn_t *conn)
-{
- if (conn->sock != NULL)
- h2o_socket_close(conn->sock);
-
- conn_list_remove_conn(&conn_list, conn);
-
- pthread_mutex_lock(&conn->rx_buf_lock);
- conn->shutdown = 1;
- pthread_cond_broadcast(&conn->rx_buf_cond);
- pthread_mutex_unlock(&conn->rx_buf_lock);
-
- h2o_stream_conn_t_destroy(conn);
- freez(conn);
-}
-
-static void on_write_complete(h2o_socket_t *sock, const char *err)
-{
- h2o_stream_conn_t *conn = sock->data;
-
- if (err != NULL) {
- stream_on_close(conn);
- error_report("Streaming connection error \"%s\"", err);
- return;
- }
-
- pthread_mutex_lock(&conn->tx_buf_lock);
-
- rbuf_bump_tail(conn->tx, conn->tx_buf.len);
-
- conn->tx_buf.base = NULL;
- conn->tx_buf.len = 0;
-
- pthread_mutex_unlock(&conn->tx_buf_lock);
-
- stream_process(conn, 0);
-}
-
-static void stream_on_recv(h2o_socket_t *sock, const char *err)
-{
- h2o_stream_conn_t *conn = sock->data;
-
- if (err != NULL) {
- stream_on_close(conn);
- error_report("Streaming connection error \"%s\"", err);
- return;
- }
- stream_process(conn, 0);
-}
-
-#define PARSE_DONE 1
-#define PARSE_ERROR -1
-#define GIMME_MORE_OF_DEM_SWEET_BYTEZ 0
-
-#define STREAM_METHOD "STREAM "
-#define USER_AGENT "User-Agent: "
-
-#define NEED_MIN_BYTES(buf, bytes) \
-if (rbuf_bytes_available(buf) < bytes) \
- return GIMME_MORE_OF_DEM_SWEET_BYTEZ;
-
-// TODO check in streaming code this is probably defined somewhere already
-#define MAX_LEN_STREAM_HELLO (1024*2)
-
-static int process_STREAM_X_HTTP_1_1(http_stream_parse_state_t *parser_state, rbuf_t buf, char **url, char **user_agent)
-{
- int idx;
- switch(*parser_state) {
- case HTTP_STREAM:
- NEED_MIN_BYTES(buf, strlen(STREAM_METHOD));
- if (rbuf_memcmp_n(buf, H2O_STRLIT(STREAM_METHOD))) {
- error_report("Expected \"%s\"", STREAM_METHOD);
- return PARSE_ERROR;
- }
- rbuf_bump_tail(buf, strlen(STREAM_METHOD));
- *parser_state = HTTP_URL;
- /* FALLTHROUGH */
- case HTTP_URL:
- if (!rbuf_find_bytes(buf, " ", 1, &idx)) {
- if (rbuf_bytes_available(buf) >= MAX_LEN_STREAM_HELLO) {
- error_report("The initial \"STREAM [URL]" HTTP_1_1 "\" over max of %d", MAX_LEN_STREAM_HELLO);
- return PARSE_ERROR;
- }
- }
- *url = mallocz(idx + 1);
- rbuf_pop(buf, *url, idx);
- (*url)[idx] = 0;
-
- *parser_state = HTTP_PROTO;
- /* FALLTHROUGH */
- case HTTP_PROTO:
- NEED_MIN_BYTES(buf, strlen(HTTP_1_1));
- if (rbuf_memcmp_n(buf, H2O_STRLIT(HTTP_1_1))) {
- error_report("Expected \"%s\"", HTTP_1_1);
- return PARSE_ERROR;
- }
- rbuf_bump_tail(buf, strlen(HTTP_1_1));
- *parser_state = HTTP_USER_AGENT_KEY;
- /* FALLTHROUGH */
- case HTTP_USER_AGENT_KEY:
- // and OF COURSE EVERYTHING is passed in URL except
- // for user agent which we need and is passed as HTTP header
- // not worth writing a parser for this so we manually extract
- // just the single header we need and skip everything else
- if (!rbuf_find_bytes(buf, USER_AGENT, strlen(USER_AGENT), &idx)) {
- if (rbuf_bytes_available(buf) >= (size_t)(rbuf_get_capacity(buf) * 0.9)) {
- error_report("The initial \"STREAM [URL]" HTTP_1_1 "\" over max of %d", MAX_LEN_STREAM_HELLO);
- return PARSE_ERROR;
- }
- return GIMME_MORE_OF_DEM_SWEET_BYTEZ;
- }
- rbuf_bump_tail(buf, idx + strlen(USER_AGENT));
- *parser_state = HTTP_USER_AGENT_VALUE;
- /* FALLTHROUGH */
- case HTTP_USER_AGENT_VALUE:
- if (!rbuf_find_bytes(buf, "\r\n", 2, &idx)) {
- if (rbuf_bytes_available(buf) >= (size_t)(rbuf_get_capacity(buf) * 0.9)) {
- error_report("The initial \"STREAM [URL]" HTTP_1_1 "\" over max of %d", MAX_LEN_STREAM_HELLO);
- return PARSE_ERROR;
- }
- return GIMME_MORE_OF_DEM_SWEET_BYTEZ;
- }
-
- *user_agent = mallocz(idx + 1);
- rbuf_pop(buf, *user_agent, idx);
- (*user_agent)[idx] = 0;
-
- *parser_state = HTTP_HDR;
- /* FALLTHROUGH */
- case HTTP_HDR:
- if (!rbuf_find_bytes(buf, HTTP_HDR_END, strlen(HTTP_HDR_END), &idx)) {
- if (rbuf_bytes_available(buf) >= (size_t)(rbuf_get_capacity(buf) * 0.9)) {
- error_report("The initial \"STREAM [URL]" HTTP_1_1 "\" over max of %d", MAX_LEN_STREAM_HELLO);
- return PARSE_ERROR;
- }
- return GIMME_MORE_OF_DEM_SWEET_BYTEZ;
- }
- rbuf_bump_tail(buf, idx + strlen(HTTP_HDR_END));
-
- *parser_state = HTTP_DONE;
- return PARSE_DONE;
- case HTTP_DONE:
- error_report("Parsing is done. No need to call again.");
- return PARSE_DONE;
- default:
- error_report("Unknown parser state %d", (int)*parser_state);
- return PARSE_ERROR;
- }
-}
-
-#define SINGLE_WRITE_MAX (1024)
-
-void stream_process(h2o_stream_conn_t *conn, int initial)
-{
- int rc;
- struct web_client w;
-
- pthread_mutex_lock(&conn->tx_buf_lock);
- if (h2o_socket_is_writing(conn->sock) || rbuf_bytes_available(conn->tx)) {
- if (rbuf_bytes_available(conn->tx) && !conn->tx_buf.base) {
- conn->tx_buf.base = rbuf_get_linear_read_range(conn->tx, &conn->tx_buf.len);
- if (conn->tx_buf.base) {
- conn->tx_buf.len = MIN(conn->tx_buf.len, SINGLE_WRITE_MAX);
- h2o_socket_write(conn->sock, &conn->tx_buf, 1, on_write_complete);
- }
- }
- }
- pthread_mutex_unlock(&conn->tx_buf_lock);
-
- if (initial)
- h2o_socket_read_start(conn->sock, stream_on_recv);
-
- if (conn->sock->input->size) {
- size_t insert_max;
- pthread_mutex_lock(&conn->rx_buf_lock);
- char *insert_loc = rbuf_get_linear_insert_range(conn->rx, &insert_max);
- if (insert_loc == NULL) {
- pthread_cond_broadcast(&conn->rx_buf_cond);
- pthread_mutex_unlock(&conn->rx_buf_lock);
- return;
- }
- insert_max = MIN(insert_max, conn->sock->input->size);
- memcpy(insert_loc, conn->sock->input->bytes, insert_max);
- rbuf_bump_head(conn->rx, insert_max);
-
- h2o_buffer_consume(&conn->sock->input, insert_max);
-
- pthread_cond_broadcast(&conn->rx_buf_cond);
- pthread_mutex_unlock(&conn->rx_buf_lock);
- }
-
- switch (conn->state) {
- case STREAM_X_HTTP_1_1:
- // no conn->rx lock here as at this point we are still single threaded
- // until we call rrdpush_receiver_thread_spawn() later down
- rc = process_STREAM_X_HTTP_1_1(&conn->parse_state, conn->rx, &conn->url, &conn->user_agent);
- if (rc == PARSE_ERROR) {
- error_report("error parsing the STREAM hello");
- break;
- }
- if (rc != PARSE_DONE)
- break;
- conn->state = STREAM_X_HTTP_1_1_DONE;
- /* FALLTHROUGH */
- case STREAM_X_HTTP_1_1_DONE:
- memset(&w, 0, sizeof(w));
- w.response.data = buffer_create(1024, NULL);
-
- // get client ip from the conn->sock
- struct sockaddr client;
- socklen_t len = h2o_socket_getpeername(conn->sock, &client);
- char peername[NI_MAXHOST];
- size_t peername_len = h2o_socket_getnumerichost(&client, len, peername);
- size_t cpy_len = sizeof(w.client_ip) < peername_len ? sizeof(w.client_ip) : peername_len;
- memcpy(w.client_ip, peername, cpy_len);
- w.client_ip[cpy_len - 1] = 0;
- w.user_agent = conn->user_agent;
-
- rc = rrdpush_receiver_thread_spawn(&w, conn->url, conn);
- if (rc != HTTP_RESP_OK) {
- error_report("HTTPD Failed to spawn the receiver thread %d", rc);
- conn->state = STREAM_CLOSE;
- stream_on_close(conn);
- } else {
- conn->state = STREAM_ACTIVE;
- }
- buffer_free(w.response.data);
- /* FALLTHROUGH */
- case STREAM_ACTIVE:
- break;
- default:
- error_report("Unknown conn->state");
- }
-}
-
-// read and write functions to be used by streaming parser
-int h2o_stream_write(void *ctx, const char *data, size_t data_len)
-{
- h2o_stream_conn_t *conn = (h2o_stream_conn_t *)ctx;
-
- pthread_mutex_lock(&conn->tx_buf_lock);
- size_t avail = rbuf_bytes_free(conn->tx);
- avail = MIN(avail, data_len);
- rbuf_push(conn->tx, data, avail);
- pthread_mutex_unlock(&conn->tx_buf_lock);
- __atomic_add_fetch(&pending_write_reqs, 1, __ATOMIC_SEQ_CST);
- return avail;
-}
-
-size_t h2o_stream_read(void *ctx, char *buf, size_t read_bytes)
-{
- int ret;
- h2o_stream_conn_t *conn = (h2o_stream_conn_t *)ctx;
-
- pthread_mutex_lock(&conn->rx_buf_lock);
- size_t avail = rbuf_bytes_available(conn->rx);
-
- if (!avail) {
- if (conn->shutdown) {
- pthread_mutex_unlock(&conn->rx_buf_lock);
- return -1;
- }
- pthread_cond_wait(&conn->rx_buf_cond, &conn->rx_buf_lock);
- if (conn->shutdown) {
- pthread_mutex_unlock(&conn->rx_buf_lock);
- return -1;
- }
- avail = rbuf_bytes_available(conn->rx);
- if (!avail) {
- pthread_mutex_unlock(&conn->rx_buf_lock);
- return 0;
- }
- }
-
- avail = MIN(avail, read_bytes);
-
- ret = rbuf_pop(conn->rx, buf, avail);
- pthread_mutex_unlock(&conn->rx_buf_lock);
-
- return ret;
-}
-
-// periodic check for pending write requests
-void check_tx_buf(h2o_stream_conn_t *conn)
-{
- pthread_mutex_lock(&conn->tx_buf_lock);
- if (rbuf_bytes_available(conn->tx)) {
- pthread_mutex_unlock(&conn->tx_buf_lock);
- stream_process(conn, 0);
- } else
- pthread_mutex_unlock(&conn->tx_buf_lock);
-}
-
-void h2o_stream_check_pending_write_reqs(void)
-{
- int _write_reqs = __atomic_exchange_n(&pending_write_reqs, 0, __ATOMIC_SEQ_CST);
- if (_write_reqs > 0)
- conn_list_iter_all(&conn_list, check_tx_buf);
-}