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authorDaniel Baumann <daniel.baumann@progress-linux.org>2018-11-07 12:22:44 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2018-11-07 12:22:44 +0000
commit1e6c93250172946eeb38e94a92a1fd12c9d3011e (patch)
tree8ca5e16dfc7ad6b3bf2738ca0a48408a950f8f7e /src/web_client.c
parentUpdate watch file (diff)
downloadnetdata-1e6c93250172946eeb38e94a92a1fd12c9d3011e.tar.xz
netdata-1e6c93250172946eeb38e94a92a1fd12c9d3011e.zip
Merging upstream version 1.11.0+dfsg.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/web_client.c')
-rw-r--r--src/web_client.c1706
1 files changed, 0 insertions, 1706 deletions
diff --git a/src/web_client.c b/src/web_client.c
deleted file mode 100644
index 477fb3d57..000000000
--- a/src/web_client.c
+++ /dev/null
@@ -1,1706 +0,0 @@
-#include "common.h"
-
-// this is an async I/O implementation of the web server request parser
-// it is used by all netdata web servers
-
-int respect_web_browser_do_not_track_policy = 0;
-char *web_x_frame_options = NULL;
-
-#ifdef NETDATA_WITH_ZLIB
-int web_enable_gzip = 1, web_gzip_level = 3, web_gzip_strategy = Z_DEFAULT_STRATEGY;
-#endif /* NETDATA_WITH_ZLIB */
-
-inline int web_client_permission_denied(struct web_client *w) {
- w->response.data->contenttype = CT_TEXT_PLAIN;
- buffer_flush(w->response.data);
- buffer_strcat(w->response.data, "You are not allowed to access this resource.");
- w->response.code = 403;
- return 403;
-}
-
-static inline int web_client_crock_socket(struct web_client *w) {
-#ifdef TCP_CORK
- if(likely(web_client_is_corkable(w) && !w->tcp_cork && w->ofd != -1)) {
- w->tcp_cork = 1;
- if(unlikely(setsockopt(w->ofd, IPPROTO_TCP, TCP_CORK, (char *) &w->tcp_cork, sizeof(int)) != 0)) {
- error("%llu: failed to enable TCP_CORK on socket.", w->id);
-
- w->tcp_cork = 0;
- return -1;
- }
- }
-#else
- (void)w;
-#endif /* TCP_CORK */
-
- return 0;
-}
-
-static inline int web_client_uncrock_socket(struct web_client *w) {
-#ifdef TCP_CORK
- if(likely(w->tcp_cork && w->ofd != -1)) {
- w->tcp_cork = 0;
- if(unlikely(setsockopt(w->ofd, IPPROTO_TCP, TCP_CORK, (char *) &w->tcp_cork, sizeof(int)) != 0)) {
- error("%llu: failed to disable TCP_CORK on socket.", w->id);
- w->tcp_cork = 1;
- return -1;
- }
- }
-#else
- (void)w;
-#endif /* TCP_CORK */
-
- return 0;
-}
-
-void web_client_request_done(struct web_client *w) {
- web_client_uncrock_socket(w);
-
- debug(D_WEB_CLIENT, "%llu: Resetting client.", w->id);
-
- if(likely(w->last_url[0])) {
- struct timeval tv;
- now_realtime_timeval(&tv);
-
- size_t size = (w->mode == WEB_CLIENT_MODE_FILECOPY)?w->response.rlen:w->response.data->len;
- size_t sent = size;
-#ifdef NETDATA_WITH_ZLIB
- if(likely(w->response.zoutput)) sent = (size_t)w->response.zstream.total_out;
-#endif
-
- // --------------------------------------------------------------------
- // global statistics
-
- finished_web_request_statistics(dt_usec(&tv, &w->tv_in),
- w->stats_received_bytes,
- w->stats_sent_bytes,
- size,
- sent);
-
- w->stats_received_bytes = 0;
- w->stats_sent_bytes = 0;
-
-
- // --------------------------------------------------------------------
-
- const char *mode;
- switch(w->mode) {
- case WEB_CLIENT_MODE_FILECOPY:
- mode = "FILECOPY";
- break;
-
- case WEB_CLIENT_MODE_OPTIONS:
- mode = "OPTIONS";
- break;
-
- case WEB_CLIENT_MODE_STREAM:
- mode = "STREAM";
- break;
-
- case WEB_CLIENT_MODE_NORMAL:
- mode = "DATA";
- break;
-
- default:
- mode = "UNKNOWN";
- break;
- }
-
- // access log
- log_access("%llu: %d '[%s]:%s' '%s' (sent/all = %zu/%zu bytes %0.0f%%, prep/sent/total = %0.2f/%0.2f/%0.2f ms) %d '%s'",
- w->id
- , gettid()
- , w->client_ip
- , w->client_port
- , mode
- , sent
- , size
- , -((size > 0) ? ((size - sent) / (double) size * 100.0) : 0.0)
- , dt_usec(&w->tv_ready, &w->tv_in) / 1000.0
- , dt_usec(&tv, &w->tv_ready) / 1000.0
- , dt_usec(&tv, &w->tv_in) / 1000.0
- , w->response.code
- , w->last_url
- );
- }
-
- if(unlikely(w->mode == WEB_CLIENT_MODE_FILECOPY)) {
- if(w->ifd != w->ofd) {
- debug(D_WEB_CLIENT, "%llu: Closing filecopy input file descriptor %d.", w->id, w->ifd);
-
- if(web_server_mode != WEB_SERVER_MODE_STATIC_THREADED) {
- if (w->ifd != -1) close(w->ifd);
- }
-
- w->ifd = w->ofd;
- }
- }
-
- w->last_url[0] = '\0';
- w->cookie1[0] = '\0';
- w->cookie2[0] = '\0';
- w->origin[0] = '*';
- w->origin[1] = '\0';
-
- freez(w->user_agent); w->user_agent = NULL;
-
- w->mode = WEB_CLIENT_MODE_NORMAL;
-
- w->tcp_cork = 0;
- web_client_disable_donottrack(w);
- web_client_disable_tracking_required(w);
- web_client_disable_keepalive(w);
- w->decoded_url[0] = '\0';
-
- buffer_reset(w->response.header_output);
- buffer_reset(w->response.header);
- buffer_reset(w->response.data);
- w->response.rlen = 0;
- w->response.sent = 0;
- w->response.code = 0;
-
- w->header_parse_tries = 0;
- w->header_parse_last_size = 0;
-
- web_client_enable_wait_receive(w);
- web_client_disable_wait_send(w);
-
- w->response.zoutput = 0;
-
- // if we had enabled compression, release it
-#ifdef NETDATA_WITH_ZLIB
- if(w->response.zinitialized) {
- debug(D_DEFLATE, "%llu: Freeing compression resources.", w->id);
- deflateEnd(&w->response.zstream);
- w->response.zsent = 0;
- w->response.zhave = 0;
- w->response.zstream.avail_in = 0;
- w->response.zstream.avail_out = 0;
- w->response.zstream.total_in = 0;
- w->response.zstream.total_out = 0;
- w->response.zinitialized = 0;
- }
-#endif // NETDATA_WITH_ZLIB
-}
-
-uid_t web_files_uid(void) {
- static char *web_owner = NULL;
- static uid_t owner_uid = 0;
-
- if(unlikely(!web_owner)) {
- // getpwuid() is not thread safe,
- // but we have called this function once
- // while single threaded
- struct passwd *pw = getpwuid(geteuid());
- web_owner = config_get(CONFIG_SECTION_WEB, "web files owner", (pw)?(pw->pw_name?pw->pw_name:""):"");
- if(!web_owner || !*web_owner)
- owner_uid = geteuid();
- else {
- // getpwnam() is not thread safe,
- // but we have called this function once
- // while single threaded
- pw = getpwnam(web_owner);
- if(!pw) {
- error("User '%s' is not present. Ignoring option.", web_owner);
- owner_uid = geteuid();
- }
- else {
- debug(D_WEB_CLIENT, "Web files owner set to %s.", web_owner);
- owner_uid = pw->pw_uid;
- }
- }
- }
-
- return(owner_uid);
-}
-
-gid_t web_files_gid(void) {
- static char *web_group = NULL;
- static gid_t owner_gid = 0;
-
- if(unlikely(!web_group)) {
- // getgrgid() is not thread safe,
- // but we have called this function once
- // while single threaded
- struct group *gr = getgrgid(getegid());
- web_group = config_get(CONFIG_SECTION_WEB, "web files group", (gr)?(gr->gr_name?gr->gr_name:""):"");
- if(!web_group || !*web_group)
- owner_gid = getegid();
- else {
- // getgrnam() is not thread safe,
- // but we have called this function once
- // while single threaded
- gr = getgrnam(web_group);
- if(!gr) {
- error("Group '%s' is not present. Ignoring option.", web_group);
- owner_gid = getegid();
- }
- else {
- debug(D_WEB_CLIENT, "Web files group set to %s.", web_group);
- owner_gid = gr->gr_gid;
- }
- }
- }
-
- return(owner_gid);
-}
-
-static struct {
- const char *extension;
- uint32_t hash;
- uint8_t contenttype;
-} mime_types[] = {
- { "html" , 0 , CT_TEXT_HTML}
- , {"js" , 0 , CT_APPLICATION_X_JAVASCRIPT}
- , {"css" , 0 , CT_TEXT_CSS}
- , {"xml" , 0 , CT_TEXT_XML}
- , {"xsl" , 0 , CT_TEXT_XSL}
- , {"txt" , 0 , CT_TEXT_PLAIN}
- , {"svg" , 0 , CT_IMAGE_SVG_XML}
- , {"ttf" , 0 , CT_APPLICATION_X_FONT_TRUETYPE}
- , {"otf" , 0 , CT_APPLICATION_X_FONT_OPENTYPE}
- , {"woff2", 0 , CT_APPLICATION_FONT_WOFF2}
- , {"woff" , 0 , CT_APPLICATION_FONT_WOFF}
- , {"eot" , 0 , CT_APPLICATION_VND_MS_FONTOBJ}
- , {"png" , 0 , CT_IMAGE_PNG}
- , {"jpg" , 0 , CT_IMAGE_JPG}
- , {"jpeg" , 0 , CT_IMAGE_JPG}
- , {"gif" , 0 , CT_IMAGE_GIF}
- , {"bmp" , 0 , CT_IMAGE_BMP}
- , {"ico" , 0 , CT_IMAGE_XICON}
- , {"icns" , 0 , CT_IMAGE_ICNS}
- , { NULL, 0, 0}
-};
-
-static inline uint8_t contenttype_for_filename(const char *filename) {
- // info("checking filename '%s'", filename);
-
- static int initialized = 0;
- int i;
-
- if(unlikely(!initialized)) {
- for (i = 0; mime_types[i].extension; i++)
- mime_types[i].hash = simple_hash(mime_types[i].extension);
-
- initialized = 1;
- }
-
- const char *s = filename, *last_dot = NULL;
-
- // find the last dot
- while(*s) {
- if(unlikely(*s == '.')) last_dot = s;
- s++;
- }
-
- if(unlikely(!last_dot || !*last_dot || !last_dot[1])) {
- // info("no extension for filename '%s'", filename);
- return CT_APPLICATION_OCTET_STREAM;
- }
- last_dot++;
-
- // info("extension for filename '%s' is '%s'", filename, last_dot);
-
- uint32_t hash = simple_hash(last_dot);
- for(i = 0; mime_types[i].extension ; i++) {
- if(unlikely(hash == mime_types[i].hash && !strcmp(last_dot, mime_types[i].extension))) {
- // info("matched extension for filename '%s': '%s'", filename, last_dot);
- return mime_types[i].contenttype;
- }
- }
-
- // info("not matched extension for filename '%s': '%s'", filename, last_dot);
- return CT_APPLICATION_OCTET_STREAM;
-}
-
-static inline int access_to_file_is_not_permitted(struct web_client *w, const char *filename) {
- w->response.data->contenttype = CT_TEXT_HTML;
- buffer_strcat(w->response.data, "Access to file is not permitted: ");
- buffer_strcat_htmlescape(w->response.data, filename);
- return 403;
-}
-
-int mysendfile(struct web_client *w, char *filename) {
- debug(D_WEB_CLIENT, "%llu: Looking for file '%s/%s'", w->id, netdata_configured_web_dir, filename);
-
- if(!web_client_can_access_dashboard(w))
- return web_client_permission_denied(w);
-
- // skip leading slashes
- while (*filename == '/') filename++;
-
- // if the filename contain known paths, skip them
- if(strncmp(filename, WEB_PATH_FILE "/", strlen(WEB_PATH_FILE) + 1) == 0)
- filename = &filename[strlen(WEB_PATH_FILE) + 1];
-
- // if the filename contains "strange" characters, refuse to serve it
- char *s;
- for(s = filename; *s ;s++) {
- if( !isalnum(*s) && *s != '/' && *s != '.' && *s != '-' && *s != '_') {
- debug(D_WEB_CLIENT_ACCESS, "%llu: File '%s' is not acceptable.", w->id, filename);
- w->response.data->contenttype = CT_TEXT_HTML;
- buffer_sprintf(w->response.data, "Filename contains invalid characters: ");
- buffer_strcat_htmlescape(w->response.data, filename);
- return 400;
- }
- }
-
- // if the filename contains a .. refuse to serve it
- if(strstr(filename, "..") != 0) {
- debug(D_WEB_CLIENT_ACCESS, "%llu: File '%s' is not acceptable.", w->id, filename);
- w->response.data->contenttype = CT_TEXT_HTML;
- buffer_strcat(w->response.data, "Relative filenames are not supported: ");
- buffer_strcat_htmlescape(w->response.data, filename);
- return 400;
- }
-
- // find the physical file on disk
- char webfilename[FILENAME_MAX + 1];
- snprintfz(webfilename, FILENAME_MAX, "%s/%s", netdata_configured_web_dir, filename);
-
- struct stat statbuf;
- int done = 0;
- while(!done) {
- // check if the file exists
- if (lstat(webfilename, &statbuf) != 0) {
- debug(D_WEB_CLIENT_ACCESS, "%llu: File '%s' is not found.", w->id, webfilename);
- w->response.data->contenttype = CT_TEXT_HTML;
- buffer_strcat(w->response.data, "File does not exist, or is not accessible: ");
- buffer_strcat_htmlescape(w->response.data, webfilename);
- return 404;
- }
-
- if ((statbuf.st_mode & S_IFMT) == S_IFDIR) {
- snprintfz(webfilename, FILENAME_MAX, "%s/%s/index.html", netdata_configured_web_dir, filename);
- continue;
- }
-
- if ((statbuf.st_mode & S_IFMT) != S_IFREG) {
- error("%llu: File '%s' is not a regular file. Access Denied.", w->id, webfilename);
- return access_to_file_is_not_permitted(w, webfilename);
- }
-
- // check if the file is owned by expected user
- if (statbuf.st_uid != web_files_uid()) {
- error("%llu: File '%s' is owned by user %u (expected user %u). Access Denied.", w->id, webfilename, statbuf.st_uid, web_files_uid());
- return access_to_file_is_not_permitted(w, webfilename);
- }
-
- // check if the file is owned by expected group
- if (statbuf.st_gid != web_files_gid()) {
- error("%llu: File '%s' is owned by group %u (expected group %u). Access Denied.", w->id, webfilename, statbuf.st_gid, web_files_gid());
- return access_to_file_is_not_permitted(w, webfilename);
- }
-
- done = 1;
- }
-
- // open the file
- w->ifd = open(webfilename, O_NONBLOCK, O_RDONLY);
- if(w->ifd == -1) {
- w->ifd = w->ofd;
-
- if(errno == EBUSY || errno == EAGAIN) {
- error("%llu: File '%s' is busy, sending 307 Moved Temporarily to force retry.", w->id, webfilename);
- w->response.data->contenttype = CT_TEXT_HTML;
- buffer_sprintf(w->response.header, "Location: /" WEB_PATH_FILE "/%s\r\n", filename);
- buffer_strcat(w->response.data, "File is currently busy, please try again later: ");
- buffer_strcat_htmlescape(w->response.data, webfilename);
- return 307;
- }
- else {
- error("%llu: Cannot open file '%s'.", w->id, webfilename);
- w->response.data->contenttype = CT_TEXT_HTML;
- buffer_strcat(w->response.data, "Cannot open file: ");
- buffer_strcat_htmlescape(w->response.data, webfilename);
- return 404;
- }
- }
-
- sock_setnonblock(w->ifd);
-
- w->response.data->contenttype = contenttype_for_filename(webfilename);
- debug(D_WEB_CLIENT_ACCESS, "%llu: Sending file '%s' (%ld bytes, ifd %d, ofd %d).", w->id, webfilename, statbuf.st_size, w->ifd, w->ofd);
-
- w->mode = WEB_CLIENT_MODE_FILECOPY;
- web_client_enable_wait_receive(w);
- web_client_disable_wait_send(w);
- buffer_flush(w->response.data);
- buffer_need_bytes(w->response.data, (size_t)statbuf.st_size);
- w->response.rlen = (size_t)statbuf.st_size;
-#ifdef __APPLE__
- w->response.data->date = statbuf.st_mtimespec.tv_sec;
-#else
- w->response.data->date = statbuf.st_mtim.tv_sec;
-#endif /* __APPLE__ */
- buffer_cacheable(w->response.data);
-
- return 200;
-}
-
-
-#ifdef NETDATA_WITH_ZLIB
-void web_client_enable_deflate(struct web_client *w, int gzip) {
- if(unlikely(w->response.zinitialized)) {
- debug(D_DEFLATE, "%llu: Compression has already be initialized for this client.", w->id);
- return;
- }
-
- if(unlikely(w->response.sent)) {
- error("%llu: Cannot enable compression in the middle of a conversation.", w->id);
- return;
- }
-
- w->response.zstream.zalloc = Z_NULL;
- w->response.zstream.zfree = Z_NULL;
- w->response.zstream.opaque = Z_NULL;
-
- w->response.zstream.next_in = (Bytef *)w->response.data->buffer;
- w->response.zstream.avail_in = 0;
- w->response.zstream.total_in = 0;
-
- w->response.zstream.next_out = w->response.zbuffer;
- w->response.zstream.avail_out = 0;
- w->response.zstream.total_out = 0;
-
- w->response.zstream.zalloc = Z_NULL;
- w->response.zstream.zfree = Z_NULL;
- w->response.zstream.opaque = Z_NULL;
-
-// if(deflateInit(&w->response.zstream, Z_DEFAULT_COMPRESSION) != Z_OK) {
-// error("%llu: Failed to initialize zlib. Proceeding without compression.", w->id);
-// return;
-// }
-
- // Select GZIP compression: windowbits = 15 + 16 = 31
- if(deflateInit2(&w->response.zstream, web_gzip_level, Z_DEFLATED, 15 + ((gzip)?16:0), 8, web_gzip_strategy) != Z_OK) {
- error("%llu: Failed to initialize zlib. Proceeding without compression.", w->id);
- return;
- }
-
- w->response.zsent = 0;
- w->response.zoutput = 1;
- w->response.zinitialized = 1;
-
- debug(D_DEFLATE, "%llu: Initialized compression.", w->id);
-}
-#endif // NETDATA_WITH_ZLIB
-
-void buffer_data_options2string(BUFFER *wb, uint32_t options) {
- int count = 0;
-
- if(options & RRDR_OPTION_NONZERO) {
- if(count++) buffer_strcat(wb, " ");
- buffer_strcat(wb, "nonzero");
- }
-
- if(options & RRDR_OPTION_REVERSED) {
- if(count++) buffer_strcat(wb, " ");
- buffer_strcat(wb, "flip");
- }
-
- if(options & RRDR_OPTION_JSON_WRAP) {
- if(count++) buffer_strcat(wb, " ");
- buffer_strcat(wb, "jsonwrap");
- }
-
- if(options & RRDR_OPTION_MIN2MAX) {
- if(count++) buffer_strcat(wb, " ");
- buffer_strcat(wb, "min2max");
- }
-
- if(options & RRDR_OPTION_MILLISECONDS) {
- if(count++) buffer_strcat(wb, " ");
- buffer_strcat(wb, "ms");
- }
-
- if(options & RRDR_OPTION_ABSOLUTE) {
- if(count++) buffer_strcat(wb, " ");
- buffer_strcat(wb, "absolute");
- }
-
- if(options & RRDR_OPTION_SECONDS) {
- if(count++) buffer_strcat(wb, " ");
- buffer_strcat(wb, "seconds");
- }
-
- if(options & RRDR_OPTION_NULL2ZERO) {
- if(count++) buffer_strcat(wb, " ");
- buffer_strcat(wb, "null2zero");
- }
-
- if(options & RRDR_OPTION_OBJECTSROWS) {
- if(count++) buffer_strcat(wb, " ");
- buffer_strcat(wb, "objectrows");
- }
-
- if(options & RRDR_OPTION_GOOGLE_JSON) {
- if(count++) buffer_strcat(wb, " ");
- buffer_strcat(wb, "google_json");
- }
-
- if(options & RRDR_OPTION_PERCENTAGE) {
- if(count++) buffer_strcat(wb, " ");
- buffer_strcat(wb, "percentage");
- }
-
- if(options & RRDR_OPTION_NOT_ALIGNED) {
- if(count++) buffer_strcat(wb, " ");
- buffer_strcat(wb, "unaligned");
- }
-}
-
-const char *group_method2string(int group) {
- switch(group) {
- case GROUP_UNDEFINED:
- return "";
-
- case GROUP_AVERAGE:
- return "average";
-
- case GROUP_MIN:
- return "min";
-
- case GROUP_MAX:
- return "max";
-
- case GROUP_SUM:
- return "sum";
-
- case GROUP_INCREMENTAL_SUM:
- return "incremental-sum";
-
- default:
- return "unknown-group-method";
- }
-}
-
-static inline int check_host_and_call(RRDHOST *host, struct web_client *w, char *url, int (*func)(RRDHOST *, struct web_client *, char *)) {
- if(unlikely(host->rrd_memory_mode == RRD_MEMORY_MODE_NONE)) {
- buffer_flush(w->response.data);
- buffer_strcat(w->response.data, "This host does not maintain a database");
- return 400;
- }
-
- return func(host, w, url);
-}
-
-static inline int check_host_and_dashboard_acl_and_call(RRDHOST *host, struct web_client *w, char *url, int (*func)(RRDHOST *, struct web_client *, char *)) {
- if(!web_client_can_access_dashboard(w))
- return web_client_permission_denied(w);
-
- return check_host_and_call(host, w, url, func);
-}
-
-int web_client_api_request(RRDHOST *host, struct web_client *w, char *url)
-{
- // get the api version
- char *tok = mystrsep(&url, "/?&");
- if(tok && *tok) {
- debug(D_WEB_CLIENT, "%llu: Searching for API version '%s'.", w->id, tok);
- if(strcmp(tok, "v1") == 0)
- return web_client_api_request_v1(host, w, url);
- else {
- buffer_flush(w->response.data);
- w->response.data->contenttype = CT_TEXT_HTML;
- buffer_strcat(w->response.data, "Unsupported API version: ");
- buffer_strcat_htmlescape(w->response.data, tok);
- return 404;
- }
- }
- else {
- buffer_flush(w->response.data);
- buffer_sprintf(w->response.data, "Which API version?");
- return 400;
- }
-}
-
-const char *web_content_type_to_string(uint8_t contenttype) {
- switch(contenttype) {
- case CT_TEXT_HTML:
- return "text/html; charset=utf-8";
-
- case CT_APPLICATION_XML:
- return "application/xml; charset=utf-8";
-
- case CT_APPLICATION_JSON:
- return "application/json; charset=utf-8";
-
- case CT_APPLICATION_X_JAVASCRIPT:
- return "application/x-javascript; charset=utf-8";
-
- case CT_TEXT_CSS:
- return "text/css; charset=utf-8";
-
- case CT_TEXT_XML:
- return "text/xml; charset=utf-8";
-
- case CT_TEXT_XSL:
- return "text/xsl; charset=utf-8";
-
- case CT_APPLICATION_OCTET_STREAM:
- return "application/octet-stream";
-
- case CT_IMAGE_SVG_XML:
- return "image/svg+xml";
-
- case CT_APPLICATION_X_FONT_TRUETYPE:
- return "application/x-font-truetype";
-
- case CT_APPLICATION_X_FONT_OPENTYPE:
- return "application/x-font-opentype";
-
- case CT_APPLICATION_FONT_WOFF:
- return "application/font-woff";
-
- case CT_APPLICATION_FONT_WOFF2:
- return "application/font-woff2";
-
- case CT_APPLICATION_VND_MS_FONTOBJ:
- return "application/vnd.ms-fontobject";
-
- case CT_IMAGE_PNG:
- return "image/png";
-
- case CT_IMAGE_JPG:
- return "image/jpeg";
-
- case CT_IMAGE_GIF:
- return "image/gif";
-
- case CT_IMAGE_XICON:
- return "image/x-icon";
-
- case CT_IMAGE_BMP:
- return "image/bmp";
-
- case CT_IMAGE_ICNS:
- return "image/icns";
-
- case CT_PROMETHEUS:
- return "text/plain; version=0.0.4";
-
- default:
- case CT_TEXT_PLAIN:
- return "text/plain; charset=utf-8";
- }
-}
-
-
-const char *web_response_code_to_string(int code) {
- switch(code) {
- case 200:
- return "OK";
-
- case 307:
- return "Temporary Redirect";
-
- case 400:
- return "Bad Request";
-
- case 403:
- return "Forbidden";
-
- case 404:
- return "Not Found";
-
- case 412:
- return "Preconditions Failed";
-
- default:
- if(code >= 100 && code < 200)
- return "Informational";
-
- if(code >= 200 && code < 300)
- return "Successful";
-
- if(code >= 300 && code < 400)
- return "Redirection";
-
- if(code >= 400 && code < 500)
- return "Bad Request";
-
- if(code >= 500 && code < 600)
- return "Server Error";
-
- return "Undefined Error";
- }
-}
-
-static inline char *http_header_parse(struct web_client *w, char *s, int parse_useragent) {
- static uint32_t hash_origin = 0, hash_connection = 0, hash_accept_encoding = 0, hash_donottrack = 0, hash_useragent = 0;
-
- if(unlikely(!hash_origin)) {
- hash_origin = simple_uhash("Origin");
- hash_connection = simple_uhash("Connection");
- hash_accept_encoding = simple_uhash("Accept-Encoding");
- hash_donottrack = simple_uhash("DNT");
- hash_useragent = simple_uhash("User-Agent");
- }
-
- char *e = s;
-
- // find the :
- while(*e && *e != ':') e++;
- if(!*e) return e;
-
- // get the name
- *e = '\0';
-
- // find the value
- char *v = e + 1, *ve;
-
- // skip leading spaces from value
- while(*v == ' ') v++;
- ve = v;
-
- // find the \r
- while(*ve && *ve != '\r') ve++;
- if(!*ve || ve[1] != '\n') {
- *e = ':';
- return ve;
- }
-
- // terminate the value
- *ve = '\0';
-
- // fprintf(stderr, "HEADER: '%s' = '%s'\n", s, v);
- uint32_t hash = simple_uhash(s);
-
- if(hash == hash_origin && !strcasecmp(s, "Origin"))
- strncpyz(w->origin, v, NETDATA_WEB_REQUEST_ORIGIN_HEADER_SIZE);
-
- else if(hash == hash_connection && !strcasecmp(s, "Connection")) {
- if(strcasestr(v, "keep-alive"))
- web_client_enable_keepalive(w);
- }
- else if(respect_web_browser_do_not_track_policy && hash == hash_donottrack && !strcasecmp(s, "DNT")) {
- if(*v == '0') web_client_disable_donottrack(w);
- else if(*v == '1') web_client_enable_donottrack(w);
- }
- else if(parse_useragent && hash == hash_useragent && !strcasecmp(s, "User-Agent")) {
- w->user_agent = strdupz(v);
- }
-#ifdef NETDATA_WITH_ZLIB
- else if(hash == hash_accept_encoding && !strcasecmp(s, "Accept-Encoding")) {
- if(web_enable_gzip) {
- if(strcasestr(v, "gzip"))
- web_client_enable_deflate(w, 1);
- //
- // does not seem to work
- // else if(strcasestr(v, "deflate"))
- // web_client_enable_deflate(w, 0);
- }
- }
-#endif /* NETDATA_WITH_ZLIB */
-
- *e = ':';
- *ve = '\r';
- return ve;
-}
-
-// http_request_validate()
-// returns:
-// = 0 : all good, process the request
-// > 0 : request is not supported
-// < 0 : request is incomplete - wait for more data
-
-typedef enum {
- HTTP_VALIDATION_OK,
- HTTP_VALIDATION_NOT_SUPPORTED,
- HTTP_VALIDATION_INCOMPLETE
-} HTTP_VALIDATION;
-
-static inline HTTP_VALIDATION http_request_validate(struct web_client *w) {
- char *s = (char *)buffer_tostring(w->response.data), *encoded_url = NULL;
-
- size_t last_pos = w->header_parse_last_size;
- if(last_pos > 4) last_pos -= 4; // allow searching for \r\n\r\n
- else last_pos = 0;
-
- w->header_parse_tries++;
- w->header_parse_last_size = buffer_strlen(w->response.data);
-
- if(w->header_parse_tries > 1) {
- if(w->header_parse_last_size < last_pos)
- last_pos = 0;
-
- if(strstr(&s[last_pos], "\r\n\r\n") == NULL) {
- if(w->header_parse_tries > 10) {
- info("Disabling slow client after %zu attempts to read the request (%zu bytes received)", w->header_parse_tries, buffer_strlen(w->response.data));
- w->header_parse_tries = 0;
- w->header_parse_last_size = 0;
- web_client_disable_wait_receive(w);
- return HTTP_VALIDATION_NOT_SUPPORTED;
- }
-
- return HTTP_VALIDATION_INCOMPLETE;
- }
- }
-
- // is is a valid request?
- if(!strncmp(s, "GET ", 4)) {
- encoded_url = s = &s[4];
- w->mode = WEB_CLIENT_MODE_NORMAL;
- }
- else if(!strncmp(s, "OPTIONS ", 8)) {
- encoded_url = s = &s[8];
- w->mode = WEB_CLIENT_MODE_OPTIONS;
- }
- else if(!strncmp(s, "STREAM ", 7)) {
- encoded_url = s = &s[7];
- w->mode = WEB_CLIENT_MODE_STREAM;
- }
- else {
- w->header_parse_tries = 0;
- w->header_parse_last_size = 0;
- web_client_disable_wait_receive(w);
- return HTTP_VALIDATION_NOT_SUPPORTED;
- }
-
- // find the SPACE + "HTTP/"
- while(*s) {
- // find the next space
- while (*s && *s != ' ') s++;
-
- // is it SPACE + "HTTP/" ?
- if(*s && !strncmp(s, " HTTP/", 6)) break;
- else s++;
- }
-
- // incomplete requests
- if(unlikely(!*s)) {
- web_client_enable_wait_receive(w);
- return HTTP_VALIDATION_INCOMPLETE;
- }
-
- // we have the end of encoded_url - remember it
- char *ue = s;
-
- // make sure we have complete request
- // complete requests contain: \r\n\r\n
- while(*s) {
- // find a line feed
- while(*s && *s++ != '\r');
-
- // did we reach the end?
- if(unlikely(!*s)) break;
-
- // is it \r\n ?
- if(likely(*s++ == '\n')) {
-
- // is it again \r\n ? (header end)
- if(unlikely(*s == '\r' && s[1] == '\n')) {
- // a valid complete HTTP request found
-
- *ue = '\0';
- url_decode_r(w->decoded_url, encoded_url, NETDATA_WEB_REQUEST_URL_SIZE + 1);
- *ue = ' ';
-
- // copy the URL - we are going to overwrite parts of it
- // FIXME -- we should avoid it
- strncpyz(w->last_url, w->decoded_url, NETDATA_WEB_REQUEST_URL_SIZE);
-
- w->header_parse_tries = 0;
- w->header_parse_last_size = 0;
- web_client_disable_wait_receive(w);
- return HTTP_VALIDATION_OK;
- }
-
- // another header line
- s = http_header_parse(w, s,
- (w->mode == WEB_CLIENT_MODE_STREAM) // parse user agent
- );
- }
- }
-
- // incomplete request
- web_client_enable_wait_receive(w);
- return HTTP_VALIDATION_INCOMPLETE;
-}
-
-static inline void web_client_send_http_header(struct web_client *w) {
- if(unlikely(w->response.code != 200))
- buffer_no_cacheable(w->response.data);
-
- // set a proper expiration date, if not already set
- if(unlikely(!w->response.data->expires)) {
- if(w->response.data->options & WB_CONTENT_NO_CACHEABLE)
- w->response.data->expires = w->tv_ready.tv_sec + localhost->rrd_update_every;
- else
- w->response.data->expires = w->tv_ready.tv_sec + 86400;
- }
-
- // prepare the HTTP response header
- debug(D_WEB_CLIENT, "%llu: Generating HTTP header with response %d.", w->id, w->response.code);
-
- const char *content_type_string = web_content_type_to_string(w->response.data->contenttype);
- const char *code_msg = web_response_code_to_string(w->response.code);
-
- // prepare the last modified and expiration dates
- char date[32], edate[32];
- {
- struct tm tmbuf, *tm;
-
- tm = gmtime_r(&w->response.data->date, &tmbuf);
- strftime(date, sizeof(date), "%a, %d %b %Y %H:%M:%S %Z", tm);
-
- tm = gmtime_r(&w->response.data->expires, &tmbuf);
- strftime(edate, sizeof(edate), "%a, %d %b %Y %H:%M:%S %Z", tm);
- }
-
- buffer_sprintf(w->response.header_output,
- "HTTP/1.1 %d %s\r\n"
- "Connection: %s\r\n"
- "Server: NetData Embedded HTTP Server v%s\r\n"
- "Access-Control-Allow-Origin: %s\r\n"
- "Access-Control-Allow-Credentials: true\r\n"
- "Content-Type: %s\r\n"
- "Date: %s\r\n"
- , w->response.code, code_msg
- , web_client_has_keepalive(w)?"keep-alive":"close"
- , VERSION
- , w->origin
- , content_type_string
- , date
- );
-
- if(unlikely(web_x_frame_options))
- buffer_sprintf(w->response.header_output, "X-Frame-Options: %s\r\n", web_x_frame_options);
-
- if(w->cookie1[0] || w->cookie2[0]) {
- if(w->cookie1[0]) {
- buffer_sprintf(w->response.header_output,
- "Set-Cookie: %s\r\n",
- w->cookie1);
- }
-
- if(w->cookie2[0]) {
- buffer_sprintf(w->response.header_output,
- "Set-Cookie: %s\r\n",
- w->cookie2);
- }
-
- if(respect_web_browser_do_not_track_policy)
- buffer_sprintf(w->response.header_output,
- "Tk: T;cookies\r\n");
- }
- else {
- if(respect_web_browser_do_not_track_policy) {
- if(web_client_has_tracking_required(w))
- buffer_sprintf(w->response.header_output,
- "Tk: T;cookies\r\n");
- else
- buffer_sprintf(w->response.header_output,
- "Tk: N\r\n");
- }
- }
-
- if(w->mode == WEB_CLIENT_MODE_OPTIONS) {
- buffer_strcat(w->response.header_output,
- "Access-Control-Allow-Methods: GET, OPTIONS\r\n"
- "Access-Control-Allow-Headers: accept, x-requested-with, origin, content-type, cookie, pragma, cache-control\r\n"
- "Access-Control-Max-Age: 1209600\r\n" // 86400 * 14
- );
- }
- else {
- buffer_sprintf(w->response.header_output,
- "Cache-Control: %s\r\n"
- "Expires: %s\r\n",
- (w->response.data->options & WB_CONTENT_NO_CACHEABLE)?"no-cache":"public",
- edate);
- }
-
- // copy a possibly available custom header
- if(unlikely(buffer_strlen(w->response.header)))
- buffer_strcat(w->response.header_output, buffer_tostring(w->response.header));
-
- // headers related to the transfer method
- if(likely(w->response.zoutput)) {
- buffer_strcat(w->response.header_output,
- "Content-Encoding: gzip\r\n"
- "Transfer-Encoding: chunked\r\n"
- );
- }
- else {
- if(likely((w->response.data->len || w->response.rlen))) {
- // we know the content length, put it
- buffer_sprintf(w->response.header_output, "Content-Length: %zu\r\n", w->response.data->len? w->response.data->len: w->response.rlen);
- }
- else {
- // we don't know the content length, disable keep-alive
- web_client_disable_keepalive(w);
- }
- }
-
- // end of HTTP header
- buffer_strcat(w->response.header_output, "\r\n");
-
- // sent the HTTP header
- debug(D_WEB_DATA, "%llu: Sending response HTTP header of size %zu: '%s'"
- , w->id
- , buffer_strlen(w->response.header_output)
- , buffer_tostring(w->response.header_output)
- );
-
- web_client_crock_socket(w);
-
- size_t count = 0;
- ssize_t bytes;
- while((bytes = send(w->ofd, buffer_tostring(w->response.header_output), buffer_strlen(w->response.header_output), 0)) == -1) {
- count++;
-
- if(count > 100 || (errno != EAGAIN && errno != EWOULDBLOCK)) {
- error("Cannot send HTTP headers to web client.");
- break;
- }
- }
-
- if(bytes != (ssize_t) buffer_strlen(w->response.header_output)) {
- if(bytes > 0)
- w->stats_sent_bytes += bytes;
-
- error("HTTP headers failed to be sent (I sent %zu bytes but the system sent %zd bytes). Closing web client."
- , buffer_strlen(w->response.header_output)
- , bytes);
-
- WEB_CLIENT_IS_DEAD(w);
- return;
- }
- else
- w->stats_sent_bytes += bytes;
-}
-
-static inline int web_client_process_url(RRDHOST *host, struct web_client *w, char *url);
-
-static inline int web_client_switch_host(RRDHOST *host, struct web_client *w, char *url) {
- static uint32_t hash_localhost = 0;
-
- if(unlikely(!hash_localhost)) {
- hash_localhost = simple_hash("localhost");
- }
-
- if(host != localhost) {
- buffer_flush(w->response.data);
- buffer_strcat(w->response.data, "Nesting of hosts is not allowed.");
- return 400;
- }
-
- char *tok = mystrsep(&url, "/?&");
- if(tok && *tok) {
- debug(D_WEB_CLIENT, "%llu: Searching for host with name '%s'.", w->id, tok);
-
- // copy the URL, we need it to serve files
- w->last_url[0] = '/';
- if(url && *url) strncpyz(&w->last_url[1], url, NETDATA_WEB_REQUEST_URL_SIZE - 1);
- else w->last_url[1] = '\0';
-
- uint32_t hash = simple_hash(tok);
-
- host = rrdhost_find_by_hostname(tok, hash);
- if(!host) host = rrdhost_find_by_guid(tok, hash);
-
- if(host) return web_client_process_url(host, w, url);
- }
-
- buffer_flush(w->response.data);
- w->response.data->contenttype = CT_TEXT_HTML;
- buffer_strcat(w->response.data, "This netdata does not maintain a database for host: ");
- buffer_strcat_htmlescape(w->response.data, tok?tok:"");
- return 404;
-}
-
-static inline int web_client_process_url(RRDHOST *host, struct web_client *w, char *url) {
- static uint32_t
- hash_api = 0,
- hash_netdata_conf = 0,
- hash_data = 0,
- hash_datasource = 0,
- hash_graph = 0,
- hash_list = 0,
- hash_all_json = 0,
- hash_host = 0;
-
-#ifdef NETDATA_INTERNAL_CHECKS
- static uint32_t hash_exit = 0, hash_debug = 0, hash_mirror = 0;
-#endif
-
- if(unlikely(!hash_api)) {
- hash_api = simple_hash("api");
- hash_netdata_conf = simple_hash("netdata.conf");
- hash_data = simple_hash(WEB_PATH_DATA);
- hash_datasource = simple_hash(WEB_PATH_DATASOURCE);
- hash_graph = simple_hash(WEB_PATH_GRAPH);
- hash_list = simple_hash("list");
- hash_all_json = simple_hash("all.json");
- hash_host = simple_hash("host");
-#ifdef NETDATA_INTERNAL_CHECKS
- hash_exit = simple_hash("exit");
- hash_debug = simple_hash("debug");
- hash_mirror = simple_hash("mirror");
-#endif
- }
-
- char *tok = mystrsep(&url, "/?");
- if(likely(tok && *tok)) {
- uint32_t hash = simple_hash(tok);
- debug(D_WEB_CLIENT, "%llu: Processing command '%s'.", w->id, tok);
-
- if(unlikely(hash == hash_api && strcmp(tok, "api") == 0)) { // current API
- debug(D_WEB_CLIENT_ACCESS, "%llu: API request ...", w->id);
- return check_host_and_call(host, w, url, web_client_api_request);
- }
- else if(unlikely(hash == hash_host && strcmp(tok, "host") == 0)) { // host switching
- debug(D_WEB_CLIENT_ACCESS, "%llu: host switch request ...", w->id);
- return web_client_switch_host(host, w, url);
- }
- else if(unlikely(hash == hash_data && strcmp(tok, WEB_PATH_DATA) == 0)) { // old API "data"
- debug(D_WEB_CLIENT_ACCESS, "%llu: old API data request...", w->id);
- return check_host_and_dashboard_acl_and_call(host, w, url, web_client_api_old_data_request_json);
- }
- else if(unlikely(hash == hash_datasource && strcmp(tok, WEB_PATH_DATASOURCE) == 0)) { // old API "datasource"
- debug(D_WEB_CLIENT_ACCESS, "%llu: old API datasource request...", w->id);
- return check_host_and_dashboard_acl_and_call(host, w, url, web_client_api_old_data_request_jsonp);
- }
- else if(unlikely(hash == hash_graph && strcmp(tok, WEB_PATH_GRAPH) == 0)) { // old API "graph"
- debug(D_WEB_CLIENT_ACCESS, "%llu: old API graph request...", w->id);
- return check_host_and_dashboard_acl_and_call(host, w, url, web_client_api_old_graph_request);
- }
- else if(unlikely(hash == hash_list && strcmp(tok, "list") == 0)) { // old API "list"
- debug(D_WEB_CLIENT_ACCESS, "%llu: old API list request...", w->id);
- return check_host_and_dashboard_acl_and_call(host, w, url, web_client_api_old_list_request);
- }
- else if(unlikely(hash == hash_all_json && strcmp(tok, "all.json") == 0)) { // old API "all.json"
- debug(D_WEB_CLIENT_ACCESS, "%llu: old API all.json request...", w->id);
- return check_host_and_dashboard_acl_and_call(host, w, url, web_client_api_old_all_json);
- }
- else if(unlikely(hash == hash_netdata_conf && strcmp(tok, "netdata.conf") == 0)) { // netdata.conf
- if(unlikely(!web_client_can_access_netdataconf(w)))
- return web_client_permission_denied(w);
-
- debug(D_WEB_CLIENT_ACCESS, "%llu: generating netdata.conf ...", w->id);
- w->response.data->contenttype = CT_TEXT_PLAIN;
- buffer_flush(w->response.data);
- config_generate(w->response.data, 0);
- return 200;
- }
-#ifdef NETDATA_INTERNAL_CHECKS
- else if(unlikely(hash == hash_exit && strcmp(tok, "exit") == 0)) {
- if(unlikely(!web_client_can_access_netdataconf(w)))
- return web_client_permission_denied(w);
-
- w->response.data->contenttype = CT_TEXT_PLAIN;
- buffer_flush(w->response.data);
-
- if(!netdata_exit)
- buffer_strcat(w->response.data, "ok, will do...");
- else
- buffer_strcat(w->response.data, "I am doing it already");
-
- error("web request to exit received.");
- netdata_cleanup_and_exit(0);
- return 200;
- }
- else if(unlikely(hash == hash_debug && strcmp(tok, "debug") == 0)) {
- if(unlikely(!web_client_can_access_netdataconf(w)))
- return web_client_permission_denied(w);
-
- buffer_flush(w->response.data);
-
- // get the name of the data to show
- tok = mystrsep(&url, "/?&");
- if(tok && *tok) {
- debug(D_WEB_CLIENT, "%llu: Searching for RRD data with name '%s'.", w->id, tok);
-
- // do we have such a data set?
- RRDSET *st = rrdset_find_byname(host, tok);
- if(!st) st = rrdset_find(host, tok);
- if(!st) {
- w->response.data->contenttype = CT_TEXT_HTML;
- buffer_strcat(w->response.data, "Chart is not found: ");
- buffer_strcat_htmlescape(w->response.data, tok);
- debug(D_WEB_CLIENT_ACCESS, "%llu: %s is not found.", w->id, tok);
- return 404;
- }
-
- debug_flags |= D_RRD_STATS;
-
- if(rrdset_flag_check(st, RRDSET_FLAG_DEBUG))
- rrdset_flag_clear(st, RRDSET_FLAG_DEBUG);
- else
- rrdset_flag_set(st, RRDSET_FLAG_DEBUG);
-
- w->response.data->contenttype = CT_TEXT_HTML;
- buffer_sprintf(w->response.data, "Chart has now debug %s: ", rrdset_flag_check(st, RRDSET_FLAG_DEBUG)?"enabled":"disabled");
- buffer_strcat_htmlescape(w->response.data, tok);
- debug(D_WEB_CLIENT_ACCESS, "%llu: debug for %s is %s.", w->id, tok, rrdset_flag_check(st, RRDSET_FLAG_DEBUG)?"enabled":"disabled");
- return 200;
- }
-
- buffer_flush(w->response.data);
- buffer_strcat(w->response.data, "debug which chart?\r\n");
- return 400;
- }
- else if(unlikely(hash == hash_mirror && strcmp(tok, "mirror") == 0)) {
- if(unlikely(!web_client_can_access_netdataconf(w)))
- return web_client_permission_denied(w);
-
- debug(D_WEB_CLIENT_ACCESS, "%llu: Mirroring...", w->id);
-
- // replace the zero bytes with spaces
- buffer_char_replace(w->response.data, '\0', ' ');
-
- // just leave the buffer as is
- // it will be copied back to the client
-
- return 200;
- }
-#endif /* NETDATA_INTERNAL_CHECKS */
- }
-
- char filename[FILENAME_MAX+1];
- url = filename;
- strncpyz(filename, w->last_url, FILENAME_MAX);
- tok = mystrsep(&url, "?");
- buffer_flush(w->response.data);
- return mysendfile(w, (tok && *tok)?tok:"/");
-}
-
-void web_client_process_request(struct web_client *w) {
-
- // start timing us
- now_realtime_timeval(&w->tv_in);
-
- switch(http_request_validate(w)) {
- case HTTP_VALIDATION_OK:
- switch(w->mode) {
- case WEB_CLIENT_MODE_STREAM:
- if(unlikely(!web_client_can_access_stream(w))) {
- web_client_permission_denied(w);
- return;
- }
-
- w->response.code = rrdpush_receiver_thread_spawn(localhost, w, w->decoded_url);
- return;
-
- case WEB_CLIENT_MODE_OPTIONS:
- if(unlikely(!web_client_can_access_dashboard(w) && !web_client_can_access_registry(w) && !web_client_can_access_badges(w))) {
- web_client_permission_denied(w);
- return;
- }
-
- w->response.data->contenttype = CT_TEXT_PLAIN;
- buffer_flush(w->response.data);
- buffer_strcat(w->response.data, "OK");
- w->response.code = 200;
- break;
-
- case WEB_CLIENT_MODE_FILECOPY:
- case WEB_CLIENT_MODE_NORMAL:
- if(unlikely(!web_client_can_access_dashboard(w) && !web_client_can_access_registry(w) && !web_client_can_access_badges(w))) {
- web_client_permission_denied(w);
- return;
- }
-
- w->response.code = web_client_process_url(localhost, w, w->decoded_url);
- break;
- }
- break;
-
- case HTTP_VALIDATION_INCOMPLETE:
- if(w->response.data->len > NETDATA_WEB_REQUEST_MAX_SIZE) {
- strcpy(w->last_url, "too big request");
-
- debug(D_WEB_CLIENT_ACCESS, "%llu: Received request is too big (%zu bytes).", w->id, w->response.data->len);
-
- buffer_flush(w->response.data);
- buffer_sprintf(w->response.data, "Received request is too big (%zu bytes).\r\n", w->response.data->len);
- w->response.code = 400;
- }
- else {
- // wait for more data
- return;
- }
- break;
-
- case HTTP_VALIDATION_NOT_SUPPORTED:
- debug(D_WEB_CLIENT_ACCESS, "%llu: Cannot understand '%s'.", w->id, w->response.data->buffer);
-
- buffer_flush(w->response.data);
- buffer_strcat(w->response.data, "I don't understand you...\r\n");
- w->response.code = 400;
- break;
- }
-
- // keep track of the time we done processing
- now_realtime_timeval(&w->tv_ready);
-
- w->response.sent = 0;
-
- // set a proper last modified date
- if(unlikely(!w->response.data->date))
- w->response.data->date = w->tv_ready.tv_sec;
-
- web_client_send_http_header(w);
-
- // enable sending immediately if we have data
- if(w->response.data->len) web_client_enable_wait_send(w);
- else web_client_disable_wait_send(w);
-
- switch(w->mode) {
- case WEB_CLIENT_MODE_STREAM:
- debug(D_WEB_CLIENT, "%llu: STREAM done.", w->id);
- break;
-
- case WEB_CLIENT_MODE_OPTIONS:
- debug(D_WEB_CLIENT, "%llu: Done preparing the OPTIONS response. Sending data (%zu bytes) to client.", w->id, w->response.data->len);
- break;
-
- case WEB_CLIENT_MODE_NORMAL:
- debug(D_WEB_CLIENT, "%llu: Done preparing the response. Sending data (%zu bytes) to client.", w->id, w->response.data->len);
- break;
-
- case WEB_CLIENT_MODE_FILECOPY:
- if(w->response.rlen) {
- debug(D_WEB_CLIENT, "%llu: Done preparing the response. Will be sending data file of %zu bytes to client.", w->id, w->response.rlen);
- web_client_enable_wait_receive(w);
-
- /*
- // utilize the kernel sendfile() for copying the file to the socket.
- // this block of code can be commented, without anything missing.
- // when it is commented, the program will copy the data using async I/O.
- {
- long len = sendfile(w->ofd, w->ifd, NULL, w->response.data->rbytes);
- if(len != w->response.data->rbytes)
- error("%llu: sendfile() should copy %ld bytes, but copied %ld. Falling back to manual copy.", w->id, w->response.data->rbytes, len);
- else
- web_client_request_done(w);
- }
- */
- }
- else
- debug(D_WEB_CLIENT, "%llu: Done preparing the response. Will be sending an unknown amount of bytes to client.", w->id);
- break;
-
- default:
- fatal("%llu: Unknown client mode %u.", w->id, w->mode);
- break;
- }
-}
-
-ssize_t web_client_send_chunk_header(struct web_client *w, size_t len)
-{
- debug(D_DEFLATE, "%llu: OPEN CHUNK of %zu bytes (hex: %zx).", w->id, len, len);
- char buf[24];
- sprintf(buf, "%zX\r\n", len);
-
- ssize_t bytes = send(w->ofd, buf, strlen(buf), 0);
- if(bytes > 0) {
- debug(D_DEFLATE, "%llu: Sent chunk header %zd bytes.", w->id, bytes);
- w->stats_sent_bytes += bytes;
- }
-
- else if(bytes == 0) {
- debug(D_WEB_CLIENT, "%llu: Did not send chunk header to the client.", w->id);
- WEB_CLIENT_IS_DEAD(w);
- }
- else {
- debug(D_WEB_CLIENT, "%llu: Failed to send chunk header to client.", w->id);
- WEB_CLIENT_IS_DEAD(w);
- }
-
- return bytes;
-}
-
-ssize_t web_client_send_chunk_close(struct web_client *w)
-{
- //debug(D_DEFLATE, "%llu: CLOSE CHUNK.", w->id);
-
- ssize_t bytes = send(w->ofd, "\r\n", 2, 0);
- if(bytes > 0) {
- debug(D_DEFLATE, "%llu: Sent chunk suffix %zd bytes.", w->id, bytes);
- w->stats_sent_bytes += bytes;
- }
-
- else if(bytes == 0) {
- debug(D_WEB_CLIENT, "%llu: Did not send chunk suffix to the client.", w->id);
- WEB_CLIENT_IS_DEAD(w);
- }
- else {
- debug(D_WEB_CLIENT, "%llu: Failed to send chunk suffix to client.", w->id);
- WEB_CLIENT_IS_DEAD(w);
- }
-
- return bytes;
-}
-
-ssize_t web_client_send_chunk_finalize(struct web_client *w)
-{
- //debug(D_DEFLATE, "%llu: FINALIZE CHUNK.", w->id);
-
- ssize_t bytes = send(w->ofd, "\r\n0\r\n\r\n", 7, 0);
- if(bytes > 0) {
- debug(D_DEFLATE, "%llu: Sent chunk suffix %zd bytes.", w->id, bytes);
- w->stats_sent_bytes += bytes;
- }
-
- else if(bytes == 0) {
- debug(D_WEB_CLIENT, "%llu: Did not send chunk finalize suffix to the client.", w->id);
- WEB_CLIENT_IS_DEAD(w);
- }
- else {
- debug(D_WEB_CLIENT, "%llu: Failed to send chunk finalize suffix to client.", w->id);
- WEB_CLIENT_IS_DEAD(w);
- }
-
- return bytes;
-}
-
-#ifdef NETDATA_WITH_ZLIB
-ssize_t web_client_send_deflate(struct web_client *w)
-{
- ssize_t len = 0, t = 0;
-
- // when using compression,
- // w->response.sent is the amount of bytes passed through compression
-
- debug(D_DEFLATE, "%llu: web_client_send_deflate(): w->response.data->len = %zu, w->response.sent = %zu, w->response.zhave = %zu, w->response.zsent = %zu, w->response.zstream.avail_in = %u, w->response.zstream.avail_out = %u, w->response.zstream.total_in = %lu, w->response.zstream.total_out = %lu.",
- w->id, w->response.data->len, w->response.sent, w->response.zhave, w->response.zsent, w->response.zstream.avail_in, w->response.zstream.avail_out, w->response.zstream.total_in, w->response.zstream.total_out);
-
- if(w->response.data->len - w->response.sent == 0 && w->response.zstream.avail_in == 0 && w->response.zhave == w->response.zsent && w->response.zstream.avail_out != 0) {
- // there is nothing to send
-
- debug(D_WEB_CLIENT, "%llu: Out of output data.", w->id);
-
- // finalize the chunk
- if(w->response.sent != 0) {
- t = web_client_send_chunk_finalize(w);
- if(t < 0) return t;
- }
-
- if(w->mode == WEB_CLIENT_MODE_FILECOPY && web_client_has_wait_receive(w) && w->response.rlen && w->response.rlen > w->response.data->len) {
- // we have to wait, more data will come
- debug(D_WEB_CLIENT, "%llu: Waiting for more data to become available.", w->id);
- web_client_disable_wait_send(w);
- return t;
- }
-
- if(unlikely(!web_client_has_keepalive(w))) {
- debug(D_WEB_CLIENT, "%llu: Closing (keep-alive is not enabled). %zu bytes sent.", w->id, w->response.sent);
- WEB_CLIENT_IS_DEAD(w);
- return t;
- }
-
- // reset the client
- web_client_request_done(w);
- debug(D_WEB_CLIENT, "%llu: Done sending all data on socket.", w->id);
- return t;
- }
-
- if(w->response.zhave == w->response.zsent) {
- // compress more input data
-
- // close the previous open chunk
- if(w->response.sent != 0) {
- t = web_client_send_chunk_close(w);
- if(t < 0) return t;
- }
-
- debug(D_DEFLATE, "%llu: Compressing %zu new bytes starting from %zu (and %u left behind).", w->id, (w->response.data->len - w->response.sent), w->response.sent, w->response.zstream.avail_in);
-
- // give the compressor all the data not passed through the compressor yet
- if(w->response.data->len > w->response.sent) {
- w->response.zstream.next_in = (Bytef *)&w->response.data->buffer[w->response.sent - w->response.zstream.avail_in];
- w->response.zstream.avail_in += (uInt) (w->response.data->len - w->response.sent);
- }
-
- // reset the compressor output buffer
- w->response.zstream.next_out = w->response.zbuffer;
- w->response.zstream.avail_out = NETDATA_WEB_RESPONSE_ZLIB_CHUNK_SIZE;
-
- // ask for FINISH if we have all the input
- int flush = Z_SYNC_FLUSH;
- if(w->mode == WEB_CLIENT_MODE_NORMAL
- || (w->mode == WEB_CLIENT_MODE_FILECOPY && !web_client_has_wait_receive(w) && w->response.data->len == w->response.rlen)) {
- flush = Z_FINISH;
- debug(D_DEFLATE, "%llu: Requesting Z_FINISH, if possible.", w->id);
- }
- else {
- debug(D_DEFLATE, "%llu: Requesting Z_SYNC_FLUSH.", w->id);
- }
-
- // compress
- if(deflate(&w->response.zstream, flush) == Z_STREAM_ERROR) {
- error("%llu: Compression failed. Closing down client.", w->id);
- web_client_request_done(w);
- return(-1);
- }
-
- w->response.zhave = NETDATA_WEB_RESPONSE_ZLIB_CHUNK_SIZE - w->response.zstream.avail_out;
- w->response.zsent = 0;
-
- // keep track of the bytes passed through the compressor
- w->response.sent = w->response.data->len;
-
- debug(D_DEFLATE, "%llu: Compression produced %zu bytes.", w->id, w->response.zhave);
-
- // open a new chunk
- ssize_t t2 = web_client_send_chunk_header(w, w->response.zhave);
- if(t2 < 0) return t2;
- t += t2;
- }
-
- debug(D_WEB_CLIENT, "%llu: Sending %zu bytes of data (+%zd of chunk header).", w->id, w->response.zhave - w->response.zsent, t);
-
- len = send(w->ofd, &w->response.zbuffer[w->response.zsent], (size_t) (w->response.zhave - w->response.zsent), MSG_DONTWAIT);
- if(len > 0) {
- w->stats_sent_bytes += len;
- w->response.zsent += len;
- len += t;
- debug(D_WEB_CLIENT, "%llu: Sent %zd bytes.", w->id, len);
- }
- else if(len == 0) {
- debug(D_WEB_CLIENT, "%llu: Did not send any bytes to the client (zhave = %zu, zsent = %zu, need to send = %zu).",
- w->id, w->response.zhave, w->response.zsent, w->response.zhave - w->response.zsent);
-
- WEB_CLIENT_IS_DEAD(w);
- }
- else {
- debug(D_WEB_CLIENT, "%llu: Failed to send data to client.", w->id);
- WEB_CLIENT_IS_DEAD(w);
- }
-
- return(len);
-}
-#endif // NETDATA_WITH_ZLIB
-
-ssize_t web_client_send(struct web_client *w) {
-#ifdef NETDATA_WITH_ZLIB
- if(likely(w->response.zoutput)) return web_client_send_deflate(w);
-#endif // NETDATA_WITH_ZLIB
-
- ssize_t bytes;
-
- if(unlikely(w->response.data->len - w->response.sent == 0)) {
- // there is nothing to send
-
- debug(D_WEB_CLIENT, "%llu: Out of output data.", w->id);
-
- // there can be two cases for this
- // A. we have done everything
- // B. we temporarily have nothing to send, waiting for the buffer to be filled by ifd
-
- if(w->mode == WEB_CLIENT_MODE_FILECOPY && web_client_has_wait_receive(w) && w->response.rlen && w->response.rlen > w->response.data->len) {
- // we have to wait, more data will come
- debug(D_WEB_CLIENT, "%llu: Waiting for more data to become available.", w->id);
- web_client_disable_wait_send(w);
- return 0;
- }
-
- if(unlikely(!web_client_has_keepalive(w))) {
- debug(D_WEB_CLIENT, "%llu: Closing (keep-alive is not enabled). %zu bytes sent.", w->id, w->response.sent);
- WEB_CLIENT_IS_DEAD(w);
- return 0;
- }
-
- web_client_request_done(w);
- debug(D_WEB_CLIENT, "%llu: Done sending all data on socket. Waiting for next request on the same socket.", w->id);
- return 0;
- }
-
- bytes = send(w->ofd, &w->response.data->buffer[w->response.sent], w->response.data->len - w->response.sent, MSG_DONTWAIT);
- if(likely(bytes > 0)) {
- w->stats_sent_bytes += bytes;
- w->response.sent += bytes;
- debug(D_WEB_CLIENT, "%llu: Sent %zd bytes.", w->id, bytes);
- }
- else if(likely(bytes == 0)) {
- debug(D_WEB_CLIENT, "%llu: Did not send any bytes to the client.", w->id);
- WEB_CLIENT_IS_DEAD(w);
- }
- else {
- debug(D_WEB_CLIENT, "%llu: Failed to send data to client.", w->id);
- WEB_CLIENT_IS_DEAD(w);
- }
-
- return(bytes);
-}
-
-ssize_t web_client_read_file(struct web_client *w)
-{
- if(unlikely(w->response.rlen > w->response.data->size))
- buffer_need_bytes(w->response.data, w->response.rlen - w->response.data->size);
-
- if(unlikely(w->response.rlen <= w->response.data->len))
- return 0;
-
- ssize_t left = w->response.rlen - w->response.data->len;
- ssize_t bytes = read(w->ifd, &w->response.data->buffer[w->response.data->len], (size_t)left);
- if(likely(bytes > 0)) {
- size_t old = w->response.data->len;
- w->response.data->len += bytes;
- w->response.data->buffer[w->response.data->len] = '\0';
-
- debug(D_WEB_CLIENT, "%llu: Read %zd bytes.", w->id, bytes);
- debug(D_WEB_DATA, "%llu: Read data: '%s'.", w->id, &w->response.data->buffer[old]);
-
- web_client_enable_wait_send(w);
-
- if(w->response.rlen && w->response.data->len >= w->response.rlen)
- web_client_disable_wait_receive(w);
- }
- else if(likely(bytes == 0)) {
- debug(D_WEB_CLIENT, "%llu: Out of input file data.", w->id);
-
- // if we cannot read, it means we have an error on input.
- // if however, we are copying a file from ifd to ofd, we should not return an error.
- // in this case, the error should be generated when the file has been sent to the client.
-
- // we are copying data from ifd to ofd
- // let it finish copying...
- web_client_disable_wait_receive(w);
-
- debug(D_WEB_CLIENT, "%llu: Read the whole file.", w->id);
-
- if(web_server_mode != WEB_SERVER_MODE_STATIC_THREADED) {
- if (w->ifd != w->ofd) close(w->ifd);
- }
-
- w->ifd = w->ofd;
- }
- else {
- debug(D_WEB_CLIENT, "%llu: read data failed.", w->id);
- WEB_CLIENT_IS_DEAD(w);
- }
-
- return(bytes);
-}
-
-ssize_t web_client_receive(struct web_client *w)
-{
- if(unlikely(w->mode == WEB_CLIENT_MODE_FILECOPY))
- return web_client_read_file(w);
-
- // do we have any space for more data?
- buffer_need_bytes(w->response.data, NETDATA_WEB_REQUEST_RECEIVE_SIZE);
-
- ssize_t left = w->response.data->size - w->response.data->len;
- ssize_t bytes = recv(w->ifd, &w->response.data->buffer[w->response.data->len], (size_t) (left - 1), MSG_DONTWAIT);
-
- if(likely(bytes > 0)) {
- w->stats_received_bytes += bytes;
-
- size_t old = w->response.data->len;
- w->response.data->len += bytes;
- w->response.data->buffer[w->response.data->len] = '\0';
-
- debug(D_WEB_CLIENT, "%llu: Received %zd bytes.", w->id, bytes);
- debug(D_WEB_DATA, "%llu: Received data: '%s'.", w->id, &w->response.data->buffer[old]);
- }
- else {
- debug(D_WEB_CLIENT, "%llu: receive data failed.", w->id);
- WEB_CLIENT_IS_DEAD(w);
- }
-
- return(bytes);
-}