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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 02:57:58 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 02:57:58 +0000
commitbe1c7e50e1e8809ea56f2c9d472eccd8ffd73a97 (patch)
tree9754ff1ca740f6346cf8483ec915d4054bc5da2d /web/server/h2o/http_server.c
parentInitial commit. (diff)
downloadnetdata-be1c7e50e1e8809ea56f2c9d472eccd8ffd73a97.tar.xz
netdata-be1c7e50e1e8809ea56f2c9d472eccd8ffd73a97.zip
Adding upstream version 1.44.3.upstream/1.44.3upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'web/server/h2o/http_server.c')
-rw-r--r--web/server/h2o/http_server.c410
1 files changed, 410 insertions, 0 deletions
diff --git a/web/server/h2o/http_server.c b/web/server/h2o/http_server.c
new file mode 100644
index 00000000..08ad120b
--- /dev/null
+++ b/web/server/h2o/http_server.c
@@ -0,0 +1,410 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "streaming/common.h"
+#include "http_server.h"
+
+#include "h2o.h"
+#include "h2o/http1.h"
+
+#include "streaming.h"
+#include "h2o_utils.h"
+
+static h2o_globalconf_t config;
+static h2o_context_t ctx;
+static h2o_accept_ctx_t accept_ctx;
+
+#define CONTENT_JSON_UTF8 H2O_STRLIT("application/json; charset=utf-8")
+#define CONTENT_TEXT_UTF8 H2O_STRLIT("text/plain; charset=utf-8")
+#define NBUF_INITIAL_SIZE_RESP (4096)
+#define API_V1_PREFIX "/api/v1/"
+#define API_V2_PREFIX "/api/v2/"
+#define HOST_SELECT_PREFIX "/host/"
+
+#define HTTPD_CONFIG_SECTION "httpd"
+#define HTTPD_ENABLED_DEFAULT false
+
+static void on_accept(h2o_socket_t *listener, const char *err)
+{
+ h2o_socket_t *sock;
+
+ if (err != NULL) {
+ return;
+ }
+
+ if ((sock = h2o_evloop_socket_accept(listener)) == NULL)
+ return;
+ h2o_accept(&accept_ctx, sock);
+}
+
+static int create_listener(const char *ip, int port)
+{
+ struct sockaddr_in addr;
+ int fd, reuseaddr_flag = 1;
+ h2o_socket_t *sock;
+
+ memset(&addr, 0, sizeof(addr));
+ addr.sin_family = AF_INET;
+ addr.sin_addr.s_addr = inet_addr(ip);
+ addr.sin_port = htons(port);
+
+ if ((fd = socket(AF_INET, SOCK_STREAM, 0)) == -1 ||
+ setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &reuseaddr_flag, sizeof(reuseaddr_flag)) != 0 ||
+ bind(fd, (struct sockaddr *)&addr, sizeof(addr)) != 0 || listen(fd, SOMAXCONN) != 0) {
+ if (fd != -1)
+ close(fd);
+ return -1;
+ }
+
+ sock = h2o_evloop_socket_create(ctx.loop, fd, H2O_SOCKET_FLAG_DONT_READ);
+ h2o_socket_read_start(sock, on_accept);
+
+ return 0;
+}
+
+static int ssl_init()
+{
+ if (!config_get_boolean(HTTPD_CONFIG_SECTION, "ssl", false))
+ return 0;
+
+ char default_fn[FILENAME_MAX + 1];
+
+ snprintfz(default_fn, FILENAME_MAX, "%s/ssl/key.pem", netdata_configured_user_config_dir);
+ const char *key_fn = config_get(HTTPD_CONFIG_SECTION, "ssl key", default_fn);
+
+ snprintfz(default_fn, FILENAME_MAX, "%s/ssl/cert.pem", netdata_configured_user_config_dir);
+ const char *cert_fn = config_get(HTTPD_CONFIG_SECTION, "ssl certificate", default_fn);
+
+#if OPENSSL_VERSION_NUMBER < OPENSSL_VERSION_110
+ accept_ctx.ssl_ctx = SSL_CTX_new(SSLv23_server_method());
+#else
+ accept_ctx.ssl_ctx = SSL_CTX_new(TLS_server_method());
+#endif
+ if (!accept_ctx.ssl_ctx) {
+ netdata_log_error("Could not allocate a new SSL_CTX");
+ return -1;
+ }
+
+ SSL_CTX_set_options(accept_ctx.ssl_ctx, SSL_OP_NO_SSLv2);
+
+ /* load certificate and private key */
+ if (SSL_CTX_use_PrivateKey_file(accept_ctx.ssl_ctx, key_fn, SSL_FILETYPE_PEM) != 1) {
+ netdata_log_error("Could not load server key from \"%s\"", key_fn);
+ return -1;
+ }
+ if (SSL_CTX_use_certificate_file(accept_ctx.ssl_ctx, cert_fn, SSL_FILETYPE_PEM) != 1) {
+ netdata_log_error("Could not load certificate from \"%s\"", cert_fn);
+ return -1;
+ }
+
+ h2o_ssl_register_alpn_protocols(accept_ctx.ssl_ctx, h2o_http2_alpn_protocols);
+
+ netdata_log_info("SSL support enabled");
+
+ return 0;
+}
+
+// I did not find a way to do wildcard paths to make common handler for urls like:
+// /api/v1/info
+// /host/child/api/v1/info
+// /host/uuid/api/v1/info
+// ideally we could do something like "/*/api/v1/info" subscription
+// so we do it "manually" here with uberhandler
+static inline int _netdata_uberhandler(h2o_req_t *req, RRDHOST **host)
+{
+ if (!h2o_memis(req->method.base, req->method.len, H2O_STRLIT("GET")))
+ return -1;
+
+ static h2o_generator_t generator = { NULL, NULL };
+
+ h2o_iovec_t norm_path = req->path_normalized;
+
+ if (norm_path.len > strlen(HOST_SELECT_PREFIX) && !memcmp(norm_path.base, HOST_SELECT_PREFIX, strlen(HOST_SELECT_PREFIX))) {
+ h2o_iovec_t host_id; // host_id can be either and UUID or a hostname of the child
+
+ norm_path.base += strlen(HOST_SELECT_PREFIX);
+ norm_path.len -= strlen(HOST_SELECT_PREFIX);
+
+ host_id = norm_path;
+
+ size_t end_loc = h2o_strstr(host_id.base, host_id.len, "/", 1);
+ if (end_loc != SIZE_MAX) {
+ host_id.len = end_loc;
+ norm_path.base += end_loc;
+ norm_path.len -= end_loc;
+ }
+
+ char *c_host_id = iovec_to_cstr(&host_id);
+ *host = rrdhost_find_by_hostname(c_host_id);
+ if (!*host)
+ *host = rrdhost_find_by_guid(c_host_id);
+ if (!*host)
+ *host = find_host_by_node_id(c_host_id);
+ if (!*host) {
+ req->res.status = HTTP_RESP_BAD_REQUEST;
+ req->res.reason = "Wrong host id";
+ h2o_send_inline(req, H2O_STRLIT("Host id provided was not found!\n"));
+ freez(c_host_id);
+ return 0;
+ }
+ freez(c_host_id);
+
+ // we have to rewrite URL here in case this is not an api call
+ // so that the subsequent file upload handler can send the correct
+ // files to the client
+ // if this is not an API call we will abort this handler later
+ // and let the internal serve file handler of h2o care for things
+
+ if (end_loc == SIZE_MAX) {
+ req->path.len = 1;
+ req->path_normalized.len = 1;
+ } else {
+ size_t offset = norm_path.base - req->path_normalized.base;
+ req->path.len -= offset;
+ req->path.base += offset;
+ req->query_at -= offset;
+ req->path_normalized.len -= offset;
+ req->path_normalized.base += offset;
+ }
+ }
+
+ // workaround for a dashboard bug which causes sometimes urls like
+ // "//api/v1/info" to be caled instead of "/api/v1/info"
+ if (norm_path.len > 2 &&
+ norm_path.base[0] == '/' &&
+ norm_path.base[1] == '/' ) {
+ norm_path.base++;
+ norm_path.len--;
+ }
+
+ unsigned int api_version = 2;
+ size_t api_loc = h2o_strstr(norm_path.base, norm_path.len, H2O_STRLIT(API_V2_PREFIX));
+ if (api_loc == SIZE_MAX) {
+ api_version = 1;
+ api_loc = h2o_strstr(norm_path.base, norm_path.len, H2O_STRLIT(API_V1_PREFIX));
+ if (api_loc == SIZE_MAX)
+ return 1;
+ }
+
+ // API_V1_PREFIX and API_V2_PREFIX are the same length
+ // but I did this just in case someone changes the length of the prefix in future
+ // so he will not be shot in the leg here
+ // until then compiler will optimize this out
+ size_t api_len = api_version == 1 ? strlen(API_V1_PREFIX) : strlen(API_V2_PREFIX);
+
+ h2o_iovec_t api_command = norm_path;
+ api_command.base += api_loc + api_len;
+ api_command.len -= api_loc + api_len;
+
+ if (!api_command.len)
+ return 1;
+
+ // this (emulating struct web_client) is a hack and will be removed
+ // in future PRs but needs bigger changes in old http_api_v1
+ // we need to make the web_client_api_request_v1 to be web server
+ // agnostic and remove the old webservers dependency creep into the
+ // individual response generators and thus remove the need to "emulate"
+ // the old webserver calling this function here and in ACLK
+ struct web_client w;
+ memset(&w, 0, sizeof(w));
+ w.response.data = buffer_create(NBUF_INITIAL_SIZE_RESP, NULL);
+ w.response.header = buffer_create(NBUF_INITIAL_SIZE_RESP, NULL);
+ w.url_query_string_decoded = buffer_create(NBUF_INITIAL_SIZE_RESP, NULL);
+ w.url_as_received = buffer_create(NBUF_INITIAL_SIZE_RESP, NULL);
+ w.acl = WEB_CLIENT_ACL_DASHBOARD;
+
+ char *path_c_str = iovec_to_cstr(&api_command);
+ char *path_unescaped = url_unescape(path_c_str);
+ buffer_strcat(w.url_as_received, iovec_to_cstr(&norm_path));
+ freez(path_c_str);
+
+ IF_HAS_URL_PARAMS(req) {
+ h2o_iovec_t query_params = URL_PARAMS_IOVEC_INIT_WITH_QUESTIONMARK(req);
+ char *query_c_str = iovec_to_cstr(&query_params);
+ char *query_unescaped = url_unescape(query_c_str);
+ freez(query_c_str);
+ buffer_strcat(w.url_query_string_decoded, query_unescaped);
+ freez(query_unescaped);
+ }
+
+//inline int web_client_api_request_v2(RRDHOST *host, struct web_client *w, char *url_path_endpoint) {
+ if (api_version == 2)
+ web_client_api_request_v2(*host, &w, path_unescaped);
+ else
+ web_client_api_request_v1(*host, &w, path_unescaped);
+ freez(path_unescaped);
+
+ h2o_iovec_t body = buffer_to_h2o_iovec(w.response.data);
+
+ // we move msg body to req->pool managed memory as it has to
+ // live until whole response has been encrypted and sent
+ // when req is finished memory will be freed with the pool
+ void *managed = h2o_mem_alloc_shared(&req->pool, body.len, NULL);
+ memcpy(managed, body.base, body.len);
+ body.base = managed;
+
+ req->res.status = HTTP_RESP_OK;
+ req->res.reason = "OK";
+ if (w.response.data->content_type == CT_APPLICATION_JSON)
+ h2o_add_header(&req->pool, &req->res.headers, H2O_TOKEN_CONTENT_TYPE, NULL, CONTENT_JSON_UTF8);
+ else
+ h2o_add_header(&req->pool, &req->res.headers, H2O_TOKEN_CONTENT_TYPE, NULL, CONTENT_TEXT_UTF8);
+ h2o_start_response(req, &generator);
+ h2o_send(req, &body, 1, H2O_SEND_STATE_FINAL);
+
+ buffer_free(w.response.data);
+ buffer_free(w.response.header);
+ buffer_free(w.url_query_string_decoded);
+ buffer_free(w.url_as_received);
+
+ return 0;
+}
+
+static int netdata_uberhandler(h2o_handler_t *self, h2o_req_t *req)
+{
+ UNUSED(self);
+ RRDHOST *host = localhost;
+
+ int ret = _netdata_uberhandler(req, &host);
+
+ if (!ret) {
+ char host_uuid_str[UUID_STR_LEN];
+
+ if (host != NULL)
+ uuid_unparse_lower(host->host_uuid, host_uuid_str);
+
+ nd_log(NDLS_ACCESS, NDLP_DEBUG, "HTTPD OK method: " PRINTF_H2O_IOVEC_FMT
+ ", path: " PRINTF_H2O_IOVEC_FMT
+ ", as host: %s"
+ ", response: %d",
+ PRINTF_H2O_IOVEC(&req->method),
+ PRINTF_H2O_IOVEC(&req->input.path),
+ host == NULL ? "unknown" : (localhost ? "localhost" : host_uuid_str),
+ req->res.status);
+ } else {
+ nd_log(NDLS_ACCESS, NDLP_DEBUG, "HTTPD %d"
+ " method: " PRINTF_H2O_IOVEC_FMT
+ ", path: " PRINTF_H2O_IOVEC_FMT
+ ", forwarding to file handler as path: " PRINTF_H2O_IOVEC_FMT,
+ ret,
+ PRINTF_H2O_IOVEC(&req->method),
+ PRINTF_H2O_IOVEC(&req->input.path),
+ PRINTF_H2O_IOVEC(&req->path));
+ }
+
+ return ret;
+}
+
+static int hdl_netdata_conf(h2o_handler_t *self, h2o_req_t *req)
+{
+ UNUSED(self);
+ if (!h2o_memis(req->method.base, req->method.len, H2O_STRLIT("GET")))
+ return -1;
+
+ BUFFER *buf = buffer_create(NBUF_INITIAL_SIZE_RESP, NULL);
+ config_generate(buf, 0);
+
+ void *managed = h2o_mem_alloc_shared(&req->pool, buf->len, NULL);
+ memcpy(managed, buf->buffer, buf->len);
+
+ req->res.status = HTTP_RESP_OK;
+ req->res.reason = "OK";
+ h2o_add_header(&req->pool, &req->res.headers, H2O_TOKEN_CONTENT_TYPE, NULL, CONTENT_TEXT_UTF8);
+ h2o_send_inline(req, managed, buf->len);
+ buffer_free(buf);
+
+ return 0;
+}
+
+static int hdl_stream(h2o_handler_t *self, h2o_req_t *req)
+{
+ UNUSED(self);
+ netdata_log_info("Streaming request trough h2o received");
+ h2o_stream_conn_t *conn = mallocz(sizeof(*conn));
+ h2o_stream_conn_t_init(conn);
+
+ if (is_streaming_handshake(req)) {
+ h2o_stream_conn_t_destroy(conn);
+ freez(conn);
+ return 1;
+ }
+
+ /* build response */
+ req->res.status = HTTP_RESP_SWITCH_PROTO;
+ req->res.reason = "Switching Protocols";
+ h2o_add_header(&req->pool, &req->res.headers, H2O_TOKEN_UPGRADE, NULL, H2O_STRLIT(NETDATA_STREAM_PROTO_NAME));
+
+// TODO we should consider adding some nonce header here
+// h2o_add_header_by_str(&req->pool, &req->res.headers, H2O_STRLIT("whatever reply"), 0, NULL, accept_key,
+// strlen(accept_key));
+
+ h2o_http1_upgrade(req, NULL, 0, stream_on_complete, conn);
+
+ return 0;
+}
+
+#define POLL_INTERVAL 100
+
+void *h2o_main(void *ptr) {
+ struct netdata_static_thread *static_thread = (struct netdata_static_thread *)ptr;
+
+ h2o_pathconf_t *pathconf;
+ h2o_hostconf_t *hostconf;
+
+ netdata_thread_disable_cancelability();
+
+ const char *bind_addr = config_get(HTTPD_CONFIG_SECTION, "bind to", "127.0.0.1");
+ int bind_port = config_get_number(HTTPD_CONFIG_SECTION, "port", 19998);
+
+ h2o_config_init(&config);
+ hostconf = h2o_config_register_host(&config, h2o_iovec_init(H2O_STRLIT("default")), bind_port);
+
+ pathconf = h2o_config_register_path(hostconf, "/netdata.conf", 0);
+ h2o_handler_t *handler = h2o_create_handler(pathconf, sizeof(*handler));
+ handler->on_req = hdl_netdata_conf;
+
+ pathconf = h2o_config_register_path(hostconf, NETDATA_STREAM_URL, 0);
+ handler = h2o_create_handler(pathconf, sizeof(*handler));
+ handler->on_req = hdl_stream;
+
+ pathconf = h2o_config_register_path(hostconf, "/", 0);
+ handler = h2o_create_handler(pathconf, sizeof(*handler));
+ handler->on_req = netdata_uberhandler;
+ h2o_file_register(pathconf, netdata_configured_web_dir, NULL, NULL, H2O_FILE_FLAG_SEND_COMPRESSED);
+
+ h2o_context_init(&ctx, h2o_evloop_create(), &config);
+
+ if(ssl_init()) {
+ error_report("SSL was requested but could not be properly initialized. Aborting.");
+ return NULL;
+ }
+
+ accept_ctx.ctx = &ctx;
+ accept_ctx.hosts = config.hosts;
+
+ if (create_listener(bind_addr, bind_port) != 0) {
+ netdata_log_error("failed to create listener %s:%d", bind_addr, bind_port);
+ return NULL;
+ }
+
+ usec_t last_wpoll = now_monotonic_usec();
+ while (service_running(SERVICE_HTTPD)) {
+ int rc = h2o_evloop_run(ctx.loop, POLL_INTERVAL);
+ if (rc < 0 && errno != EINTR) {
+ netdata_log_error("h2o_evloop_run returned (%d) with errno other than EINTR. Aborting", rc);
+ break;
+ }
+ usec_t now = now_monotonic_usec();
+ if (now - last_wpoll > POLL_INTERVAL * USEC_PER_MS) {
+ last_wpoll = now;
+
+ h2o_stream_check_pending_write_reqs();
+ }
+ }
+
+ static_thread->enabled = NETDATA_MAIN_THREAD_EXITED;
+ return NULL;
+}
+
+int httpd_is_enabled() {
+ return config_get_boolean(HTTPD_CONFIG_SECTION, "enabled", HTTPD_ENABLED_DEFAULT);
+}