Merging upstream version 1.11.0+dfsg.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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);
-}