+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <unistd.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
+#include <errno.h>
+#include <pthread.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <netinet/tcp.h>
+#include <malloc.h>
+#include "common.h"
+#include "log.h"
+#include "appconfig.h"
+#include "url.h"
+#include "web_buffer.h"
+#include "web_server.h"
#include "global_statistics.h"
+#include "rrd.h"
+#include "rrd2json.h"
+
#include "web_client.h"
-#include "log.h"
#define INITIAL_WEB_DATA_LENGTH 65536
+int web_client_timeout = DEFAULT_DISCONNECT_IDLE_WEB_CLIENTS_AFTER_SECONDS;
+int web_enable_gzip = 1;
+
struct web_client *web_clients = NULL;
unsigned long long web_clients_count = 0;
struct web_client *web_client_create(int listener)
{
struct web_client *w;
- socklen_t addrlen;
w = calloc(1, sizeof(struct web_client));
if(!w) {
w->id = ++web_clients_count;
w->mode = WEB_CLIENT_MODE_NORMAL;
- addrlen = sizeof(w->clientaddr);
- w->ifd = accept(listener, (struct sockaddr *)&w->clientaddr, &addrlen);
- if (w->ifd == -1) {
- error("%llu: Cannot accept new incoming connection.", w->id);
- free(w);
- return NULL;
- }
- w->ofd = w->ifd;
+ {
+ struct sockaddr *sadr;
+ socklen_t addrlen;
- strncpy(w->client_ip, inet_ntoa(w->clientaddr.sin_addr), 100);
- w->client_ip[100] = '\0';
+ sadr = (struct sockaddr*) &w->clientaddr;
+ addrlen = sizeof(w->clientaddr);
- debug(D_WEB_CLIENT_ACCESS, "%llu: New web client from %s on socket %d.", w->id, w->client_ip, w->ifd);
+ w->ifd = accept(listener, sadr, &addrlen);
+ if (w->ifd == -1) {
+ error("%llu: Cannot accept new incoming connection.", w->id);
+ free(w);
+ return NULL;
+ }
+ w->ofd = w->ifd;
- {
- int flag = 1;
+ if(getnameinfo(sadr, addrlen, w->client_ip, NI_MAXHOST, w->client_port, NI_MAXSERV, NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
+ error("Cannot getnameinfo() on received client connection.");
+ strncpy(w->client_ip, "UNKNOWN", NI_MAXHOST);
+ strncpy(w->client_port, "UNKNOWN", NI_MAXSERV);
+ }
+ w->client_ip[NI_MAXHOST] = '\0';
+ w->client_port[NI_MAXSERV] = '\0';
+
+ switch(sadr->sa_family) {
+
+ case AF_INET:
+ debug(D_WEB_CLIENT_ACCESS, "%llu: New IPv4 web client from %s port %s on socket %d.", w->id, w->client_ip, w->client_port, w->ifd);
+ break;
+
+ case AF_INET6:
+ if(strncmp(w->client_ip, "::ffff:", 7) == 0) {
+ strcpy(w->client_ip, &w->client_ip[7]);
+ debug(D_WEB_CLIENT_ACCESS, "%llu: New IPv4 web client from %s port %s on socket %d.", w->id, w->client_ip, w->client_port, w->ifd);
+ }
+ debug(D_WEB_CLIENT_ACCESS, "%llu: New IPv6 web client from %s port %s on socket %d.", w->id, w->client_ip, w->client_port, w->ifd);
+ break;
+
+ default:
+ debug(D_WEB_CLIENT_ACCESS, "%llu: New UNKNOWN web client from %s port %s on socket %d.", w->id, w->client_ip, w->client_port, w->ifd);
+ break;
+ }
+
+ int flag = 1;
if(setsockopt(w->ifd, SOL_SOCKET, SO_KEEPALIVE, (char *) &flag, sizeof(int)) != 0) error("%llu: Cannot set SO_KEEPALIVE on socket.", w->id);
}
w->data = web_buffer_create(INITIAL_WEB_DATA_LENGTH);
- if(!w->data) {
+ if(unlikely(!w->data)) {
+ // no need for error log - web_buffer_create already logged the error
close(w->ifd);
free(w);
return NULL;
{
struct web_client *n = w->next;
- debug(D_WEB_CLIENT_ACCESS, "%llu: Closing web client from %s.", w->id, inet_ntoa(w->clientaddr.sin_addr));
+ debug(D_WEB_CLIENT_ACCESS, "%llu: Closing web client from %s port %s.", w->id, w->client_ip, w->client_port);
if(w->prev) w->prev->next = w->next;
if(w->next) w->next->prev = w->prev;
return(n);
}
+
+int mysendfile(struct web_client *w, char *filename)
+{
+ static char *web_dir = NULL;
+ if(!web_dir) web_dir = config_get("global", "web files directory", WEB_DIR);
+
+ debug(D_WEB_CLIENT, "%llu: Looking for file '%s'...", w->id, filename);
+
+ // skip leading slashes
+ while (*filename == '/') filename++;
+
+ // if the filename contain known paths, skip them
+ if(strncmp(filename, WEB_PATH_DATA "/", strlen(WEB_PATH_DATA) + 1) == 0) filename = &filename[strlen(WEB_PATH_DATA) + 1];
+ else if(strncmp(filename, WEB_PATH_DATASOURCE "/", strlen(WEB_PATH_DATASOURCE) + 1) == 0) filename = &filename[strlen(WEB_PATH_DATASOURCE) + 1];
+ else if(strncmp(filename, WEB_PATH_GRAPH "/", strlen(WEB_PATH_GRAPH) + 1) == 0) filename = &filename[strlen(WEB_PATH_GRAPH) + 1];
+ else if(strncmp(filename, WEB_PATH_FILE "/", strlen(WEB_PATH_FILE) + 1) == 0) filename = &filename[strlen(WEB_PATH_FILE) + 1];
+
+ // if the filename contains a / or a .., refuse to serve it
+ if(strchr(filename, '/') != 0 || strstr(filename, "..") != 0) {
+ debug(D_WEB_CLIENT_ACCESS, "%llu: File '%s' is not acceptable.", w->id, filename);
+ web_buffer_printf(w->data, "File '%s' cannot be served. Filenames cannot contain / or ..", filename);
+ return 400;
+ }
+
+ // access the file
+ char webfilename[FILENAME_MAX + 1];
+ snprintf(webfilename, FILENAME_MAX, "%s/%s", web_dir, filename);
+
+ // check if the file exists
+ struct stat stat;
+ if(lstat(webfilename, &stat) != 0) {
+ error("%llu: File '%s' is not found.", w->id, webfilename);
+ web_buffer_printf(w->data, "File '%s' does not exist, or is not accessible.", filename);
+ return 404;
+ }
+
+ // check if the file is owned by us
+ if(stat.st_uid != getuid() && stat.st_uid != geteuid()) {
+ error("%llu: File '%s' is owned by user %d (I run as user %d). Access Denied.", w->id, webfilename, stat.st_uid, getuid());
+ web_buffer_printf(w->data, "Access to file '%s' is not permitted.", filename);
+ return 403;
+ }
+
+ // 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);
+ snprintf(w->response_header, MAX_HTTP_HEADER_SIZE, "Location: /" WEB_PATH_FILE "/%s\r\n", filename);
+ web_buffer_printf(w->data, "The file '%s' is currently busy. Please try again later.", filename);
+ return 307;
+ }
+ else {
+ error("%llu: Cannot open file '%s'.", w->id, webfilename);
+ web_buffer_printf(w->data, "Cannot open file '%s'.", filename);
+ return 404;
+ }
+ }
+
+ // pick a Content-Type for the file
+ if(strstr(filename, ".html") != NULL) w->data->contenttype = CT_TEXT_HTML;
+ else if(strstr(filename, ".js") != NULL) w->data->contenttype = CT_APPLICATION_X_JAVASCRIPT;
+ else if(strstr(filename, ".css") != NULL) w->data->contenttype = CT_TEXT_CSS;
+ else if(strstr(filename, ".xml") != NULL) w->data->contenttype = CT_TEXT_XML;
+ else if(strstr(filename, ".xsl") != NULL) w->data->contenttype = CT_TEXT_XSL;
+ else if(strstr(filename, ".txt") != NULL) w->data->contenttype = CT_TEXT_PLAIN;
+ else if(strstr(filename, ".svg") != NULL) w->data->contenttype = CT_IMAGE_SVG_XML;
+ else if(strstr(filename, ".ttf") != NULL) w->data->contenttype = CT_APPLICATION_X_FONT_TRUETYPE;
+ else if(strstr(filename, ".otf") != NULL) w->data->contenttype = CT_APPLICATION_X_FONT_OPENTYPE;
+ else if(strstr(filename, ".woff") != NULL) w->data->contenttype = CT_APPLICATION_FONT_WOFF;
+ else if(strstr(filename, ".eot") != NULL) w->data->contenttype = CT_APPLICATION_VND_MS_FONTOBJ;
+ else w->data->contenttype = CT_APPLICATION_OCTET_STREAM;
+
+ debug(D_WEB_CLIENT_ACCESS, "%llu: Sending file '%s' (%ld bytes, ifd %d, ofd %d).", w->id, webfilename, stat.st_size, w->ifd, w->ofd);
+
+ w->mode = WEB_CLIENT_MODE_FILECOPY;
+ w->wait_receive = 1;
+ w->wait_send = 0;
+ w->data->bytes = 0;
+ w->data->buffer[0] = '\0';
+ w->data->rbytes = stat.st_size;
+ w->data->date = stat.st_mtim.tv_sec;
+
+ return 200;
+}
+
+void web_client_reset(struct web_client *w)
+{
+ struct timeval tv;
+ gettimeofday(&tv, NULL);
+
+ long sent = (w->mode == WEB_CLIENT_MODE_FILECOPY)?w->data->rbytes:w->data->bytes;
+
+#ifdef NETDATA_WITH_ZLIB
+ if(likely(w->zoutput)) sent = (long)w->zstream.total_out;
+#endif
+
+ long size = (w->mode == WEB_CLIENT_MODE_FILECOPY)?w->data->rbytes:w->data->bytes;
+
+ if(likely(w->last_url[0]))
+ log_access("%llu: (sent/all = %ld/%ld bytes %0.0f%%, prep/sent/total = %0.2f/%0.2f/%0.2f ms) %s: '%s'",
+ w->id,
+ sent, size, -((size>0)?((float)(size-sent)/(float)size * 100.0):0.0),
+ (float)usecdiff(&w->tv_ready, &w->tv_in) / 1000.0,
+ (float)usecdiff(&tv, &w->tv_ready) / 1000.0,
+ (float)usecdiff(&tv, &w->tv_in) / 1000.0,
+ (w->mode == WEB_CLIENT_MODE_FILECOPY)?"filecopy":"data",
+ w->last_url
+ );
+
+ debug(D_WEB_CLIENT, "%llu: Reseting client.", w->id);
+
+ if(unlikely(w->mode == WEB_CLIENT_MODE_FILECOPY)) {
+ debug(D_WEB_CLIENT, "%llu: Closing filecopy input file.", w->id);
+ close(w->ifd);
+ w->ifd = w->ofd;
+ }
+
+ w->last_url[0] = '\0';
+
+ w->data->contenttype = CT_TEXT_PLAIN;
+ w->mode = WEB_CLIENT_MODE_NORMAL;
+
+ w->data->rbytes = 0;
+ w->data->bytes = 0;
+ w->data->sent = 0;
+
+ w->response_header[0] = '\0';
+ w->data->buffer[0] = '\0';
+
+ w->wait_receive = 1;
+ w->wait_send = 0;
+
+ w->zoutput = 0;
+
+ // if we had enabled compression, release it
+#ifdef NETDATA_WITH_ZLIB
+ if(w->zinitialized) {
+ debug(D_DEFLATE, "%llu: Reseting compression.", w->id);
+ deflateEnd(&w->zstream);
+ w->zsent = 0;
+ w->zhave = 0;
+ w->zstream.avail_in = 0;
+ w->zstream.avail_out = 0;
+ w->zstream.total_in = 0;
+ w->zstream.total_out = 0;
+ w->zinitialized = 0;
+ }
+#endif // NETDATA_WITH_ZLIB
+}
+
+#ifdef NETDATA_WITH_ZLIB
+void web_client_enable_deflate(struct web_client *w) {
+ if(w->zinitialized == 1) {
+ error("%llu: Compression has already be initialized for this client.", w->id);
+ return;
+ }
+
+ if(w->data->sent) {
+ error("%llu: Cannot enable compression in the middle of a conversation.", w->id);
+ return;
+ }
+
+ w->zstream.zalloc = Z_NULL;
+ w->zstream.zfree = Z_NULL;
+ w->zstream.opaque = Z_NULL;
+
+ w->zstream.next_in = (Bytef *)w->data->buffer;
+ w->zstream.avail_in = 0;
+ w->zstream.total_in = 0;
+
+ w->zstream.next_out = w->zbuffer;
+ w->zstream.avail_out = 0;
+ w->zstream.total_out = 0;
+
+ w->zstream.zalloc = Z_NULL;
+ w->zstream.zfree = Z_NULL;
+ w->zstream.opaque = Z_NULL;
+
+// if(deflateInit(&w->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->zstream, Z_DEFAULT_COMPRESSION, Z_DEFLATED, 31, 8, Z_DEFAULT_STRATEGY) != Z_OK) {
+ error("%llu: Failed to initialize zlib. Proceeding without compression.", w->id);
+ return;
+ }
+
+ w->zsent = 0;
+ w->zoutput = 1;
+ w->zinitialized = 1;
+
+ debug(D_DEFLATE, "%llu: Initialized compression.", w->id);
+}
+#endif // NETDATA_WITH_ZLIB
+
+int web_client_data_request(struct web_client *w, char *url, int datasource_type)
+{
+ char *args = strchr(url, '?');
+ if(args) {
+ *args='\0';
+ args = &args[1];
+ }
+
+ // get the name of the data to show
+ char *tok = mystrsep(&url, "/");
+ 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(tok);
+ if(!st) st = rrdset_find(tok);
+ if(!st) {
+ // we don't have it
+ // try to send a file with that name
+ w->data->bytes = 0;
+ return(mysendfile(w, tok));
+ }
+
+ // we have it
+ debug(D_WEB_CLIENT, "%llu: Found RRD data with name '%s'.", w->id, tok);
+
+ // how many entries does the client want?
+ long lines = rrd_default_history_entries;
+ long group_count = 1;
+ time_t after = 0, before = 0;
+ int group_method = GROUP_AVERAGE;
+ int nonzero = 0;
+
+ if(url) {
+ // parse the lines required
+ tok = mystrsep(&url, "/");
+ if(tok) lines = atoi(tok);
+ if(lines < 1) lines = 1;
+ }
+ if(url) {
+ // parse the group count required
+ tok = mystrsep(&url, "/");
+ if(tok) group_count = atoi(tok);
+ if(group_count < 1) group_count = 1;
+ //if(group_count > save_history / 20) group_count = save_history / 20;
+ }
+ if(url) {
+ // parse the grouping method required
+ tok = mystrsep(&url, "/");
+ if(strcmp(tok, "max") == 0) group_method = GROUP_MAX;
+ else if(strcmp(tok, "average") == 0) group_method = GROUP_AVERAGE;
+ else if(strcmp(tok, "sum") == 0) group_method = GROUP_SUM;
+ else debug(D_WEB_CLIENT, "%llu: Unknown group method '%s'", w->id, tok);
+ }
+ if(url) {
+ // parse after time
+ tok = mystrsep(&url, "/");
+ if(tok) after = strtoul(tok, NULL, 10);
+ if(after < 0) after = 0;
+ }
+ if(url) {
+ // parse before time
+ tok = mystrsep(&url, "/");
+ if(tok) before = strtoul(tok, NULL, 10);
+ if(before < 0) before = 0;
+ }
+ if(url) {
+ // parse nonzero
+ tok = mystrsep(&url, "/");
+ if(tok && strcmp(tok, "nonzero") == 0) nonzero = 1;
+ }
+
+ w->data->contenttype = CT_APPLICATION_JSON;
+ w->data->bytes = 0;
+
+ char *google_version = "0.6";
+ char *google_reqId = "0";
+ char *google_sig = "0";
+ char *google_out = "json";
+ char *google_responseHandler = "google.visualization.Query.setResponse";
+ char *google_outFileName = NULL;
+ unsigned long last_timestamp_in_data = 0;
+ if(datasource_type == DATASOURCE_GOOGLE_JSON || datasource_type == DATASOURCE_GOOGLE_JSONP) {
+
+ w->data->contenttype = CT_APPLICATION_X_JAVASCRIPT;
+
+ while(args) {
+ tok = mystrsep(&args, "&");
+ if(tok) {
+ char *name = mystrsep(&tok, "=");
+ if(name && strcmp(name, "tqx") == 0) {
+ char *key = mystrsep(&tok, ":");
+ char *value = mystrsep(&tok, ";");
+ if(key && value && *key && *value) {
+ if(strcmp(key, "version") == 0)
+ google_version = value;
+
+ else if(strcmp(key, "reqId") == 0)
+ google_reqId = value;
+
+ else if(strcmp(key, "sig") == 0)
+ google_sig = value;
+
+ else if(strcmp(key, "out") == 0)
+ google_out = value;
+
+ else if(strcmp(key, "responseHandler") == 0)
+ google_responseHandler = value;
+
+ else if(strcmp(key, "outFileName") == 0)
+ google_outFileName = value;
+ }
+ }
+ }
+ }
+
+ debug(D_WEB_CLIENT_ACCESS, "%llu: GOOGLE JSONP: version = '%s', reqId = '%s', sig = '%s', out = '%s', responseHandler = '%s', outFileName = '%s'",
+ w->id, google_version, google_reqId, google_sig, google_out, google_responseHandler, google_outFileName
+ );
+
+ if(datasource_type == DATASOURCE_GOOGLE_JSONP) {
+ last_timestamp_in_data = strtoul(google_sig, NULL, 0);
+
+ // check the client wants json
+ if(strcmp(google_out, "json") != 0) {
+ w->data->bytes = snprintf(w->data->buffer, w->data->size,
+ "%s({version:'%s',reqId:'%s',status:'error',errors:[{reason:'invalid_query',message:'output format is not supported',detailed_message:'the format %s requested is not supported by netdata.'}]});",
+ google_responseHandler, google_version, google_reqId, google_out);
+ return 200;
+ }
+ }
+ }
+
+ if(datasource_type == DATASOURCE_GOOGLE_JSONP) {
+ w->data->bytes = snprintf(w->data->buffer, w->data->size,
+ "%s({version:'%s',reqId:'%s',status:'ok',sig:'%lu',table:",
+ google_responseHandler, google_version, google_reqId, st->last_updated.tv_sec);
+ }
+
+ debug(D_WEB_CLIENT_ACCESS, "%llu: Sending RRD data '%s' (id %s, %d lines, %d group, %d group_method, %lu after, %lu before).", w->id, st->name, st->id, lines, group_count, group_method, after, before);
+ unsigned long timestamp_in_data = rrd_stats_json(datasource_type, st, w->data, lines, group_count, group_method, after, before, nonzero);
+
+ if(datasource_type == DATASOURCE_GOOGLE_JSONP) {
+ if(timestamp_in_data > last_timestamp_in_data)
+ w->data->bytes += snprintf(&w->data->buffer[w->data->bytes], w->data->size - w->data->bytes, "});");
+
+ else {
+ // the client already has the latest data
+ w->data->bytes = snprintf(w->data->buffer, w->data->size,
+ "%s({version:'%s',reqId:'%s',status:'error',errors:[{reason:'not_modified',message:'Data not modified'}]});",
+ google_responseHandler, google_version, google_reqId);
+ }
+ }
+
+ return 200;
+}
+
+/*
+int web_client_parse_request(struct web_client *w) {
+ // protocol
+ // hostname
+ // path
+ // query string name-value
+ // http version
+ // method
+ // http request headers name-value
+
+ web_client_clean_request(w);
+
+ debug(D_WEB_DATA, "%llu: Processing data buffer of %d bytes: '%s'.", w->id, w->data->bytes, w->data->buffer);
+
+ char *buf = w->data->buffer;
+ char *line, *tok;
+
+ // ------------------------------------------------------------------------
+ // the first line
+
+ if(buf && (line = strsep(&buf, "\r\n"))) {
+ // method
+ if(line && (tok = strsep(&line, " "))) {
+ w->request.protocol = strdup(tok);
+ }
+ else goto cleanup;
+
+ // url
+ }
+ else goto cleanup;
+
+ // ------------------------------------------------------------------------
+ // the rest of the lines
+
+ while(buf && (line = strsep(&buf, "\r\n"))) {
+ while(line && (tok = strsep(&line, ": "))) {
+ }
+ }
+
+ char *url = NULL;
+
+
+cleanup:
+ web_client_clean_request(w);
+ return 0;
+}
+*/
+
+void web_client_process(struct web_client *w) {
+ int code = 500;
+ int bytes;
+
+ w->wait_receive = 0;
+
+ // check if we have an empty line (end of HTTP header)
+ if(strstr(w->data->buffer, "\r\n\r\n")) {
+ global_statistics_lock();
+ global_statistics.web_requests++;
+ global_statistics_unlock();
+
+ gettimeofday(&w->tv_in, NULL);
+ debug(D_WEB_DATA, "%llu: Processing data buffer of %d bytes: '%s'.", w->id, w->data->bytes, w->data->buffer);
+
+ // check if the client requested keep-alive HTTP
+ if(strcasestr(w->data->buffer, "Connection: keep-alive")) w->keepalive = 1;
+ else w->keepalive = 0;
+
+#ifdef NETDATA_WITH_ZLIB
+ // check if the client accepts deflate
+ if(web_enable_gzip && strstr(w->data->buffer, "gzip"))
+ web_client_enable_deflate(w);
+#endif // NETDATA_WITH_ZLIB
+
+ int datasource_type = DATASOURCE_GOOGLE_JSONP;
+ //if(strstr(w->data->buffer, "X-DataSource-Auth"))
+ // datasource_type = DATASOURCE_GOOGLE_JSON;
+
+ char *buf = w->data->buffer;
+ char *tok = strsep(&buf, " \r\n");
+ char *url = NULL;
+ char *pointer_to_free = NULL; // keep url_decode() allocated buffer
+
+ if(buf && strcmp(tok, "GET") == 0) {
+ tok = strsep(&buf, " \r\n");
+ pointer_to_free = url = url_decode(tok);
+ debug(D_WEB_CLIENT, "%llu: Processing HTTP GET on url '%s'.", w->id, url);
+ }
+ else if (buf && strcmp(tok, "POST") == 0) {
+ w->keepalive = 0;
+ tok = strsep(&buf, " \r\n");
+ pointer_to_free = url = url_decode(tok);
+
+ debug(D_WEB_CLIENT, "%llu: I don't know how to handle POST with form data. Assuming it is a GET on url '%s'.", w->id, url);
+ }
+
+ w->last_url[0] = '\0';
+ if(url) {
+ strncpy(w->last_url, url, URL_MAX);
+ w->last_url[URL_MAX] = '\0';
+
+ tok = mystrsep(&url, "/?&");
+
+ debug(D_WEB_CLIENT, "%llu: Processing command '%s'.", w->id, tok);
+
+ if(strcmp(tok, WEB_PATH_DATA) == 0) { // "data"
+ // the client is requesting rrd data
+ datasource_type = DATASOURCE_JSON;
+ code = web_client_data_request(w, url, datasource_type);
+ }
+ else if(strcmp(tok, WEB_PATH_DATASOURCE) == 0) { // "datasource"
+ // the client is requesting google datasource
+ code = web_client_data_request(w, url, datasource_type);
+ }
+ else if(strcmp(tok, WEB_PATH_GRAPH) == 0) { // "graph"
+ // the client is requesting an rrd graph
+
+ // get the name of the data to show
+ tok = mystrsep(&url, "/?&");
+ 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(tok);
+ if(!st) st = rrdset_find(tok);
+ if(!st) {
+ // we don't have it
+ // try to send a file with that name
+ w->data->bytes = 0;
+ code = mysendfile(w, tok);
+ }
+ else {
+ code = 200;
+ debug(D_WEB_CLIENT_ACCESS, "%llu: Sending %s.json of RRD_STATS...", w->id, st->name);
+ w->data->contenttype = CT_APPLICATION_JSON;
+ w->data->bytes = 0;
+ rrd_stats_graph_json(st, url, w->data);
+ }
+ }
+ else if(strcmp(tok, "debug") == 0) {
+ w->data->bytes = 0;
+
+ // get the name of the data to show
+ tok = mystrsep(&url, "/?&");
+ 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(tok);
+ if(!st) st = rrdset_find(tok);
+ if(!st) {
+ code = 404;
+ web_buffer_printf(w->data, "Chart %s is not found.\r\n", tok);
+ debug(D_WEB_CLIENT_ACCESS, "%llu: %s is not found.", w->id, tok);
+ }
+ else {
+ code = 200;
+ debug_flags |= D_RRD_STATS;
+ st->debug = st->debug?0:1;
+ web_buffer_printf(w->data, "Chart %s has now debug %s.\r\n", tok, st->debug?"enabled":"disabled");
+ debug(D_WEB_CLIENT_ACCESS, "%llu: debug for %s is %s.", w->id, tok, st->debug?"enabled":"disabled");
+ }
+ }
+ else if(strcmp(tok, "mirror") == 0) {
+ code = 200;
+
+ debug(D_WEB_CLIENT_ACCESS, "%llu: Mirroring...", w->id);
+
+ // replace the zero bytes with spaces
+ int i;
+ for(i = 0; i < w->data->size; i++)
+ if(w->data->buffer[i] == '\0') w->data->buffer[i] = ' ';
+
+ // just leave the buffer as is
+ // it will be copied back to the client
+ }
+ else if(strcmp(tok, "list") == 0) {
+ code = 200;
+
+ debug(D_WEB_CLIENT_ACCESS, "%llu: Sending list of RRD_STATS...", w->id);
+
+ w->data->bytes = 0;
+ RRDSET *st = rrdset_root;
+
+ for ( ; st ; st = st->next )
+ web_buffer_printf(w->data, "%s\n", st->name);
+ }
+ else if(strcmp(tok, "all.json") == 0) {
+ code = 200;
+ debug(D_WEB_CLIENT_ACCESS, "%llu: Sending JSON list of all monitors of RRD_STATS...", w->id);
+
+ w->data->contenttype = CT_APPLICATION_JSON;
+ w->data->bytes = 0;
+ rrd_stats_all_json(w->data);
+ }
+ else if(strcmp(tok, "netdata.conf") == 0) {
+ code = 200;
+ debug(D_WEB_CLIENT_ACCESS, "%llu: Sending netdata.conf ...", w->id);
+
+ w->data->contenttype = CT_TEXT_PLAIN;
+ w->data->bytes = 0;
+ generate_config(w->data, 0);
+ }
+ else if(strcmp(tok, WEB_PATH_FILE) == 0) { // "file"
+ tok = mystrsep(&url, "/?&");
+ if(tok && *tok) code = mysendfile(w, tok);
+ else {
+ code = 400;
+ w->data->bytes = 0;
+ strcpy(w->data->buffer, "You have to give a filename to get.\r\n");
+ w->data->bytes = strlen(w->data->buffer);
+ }
+ }
+ else if(!tok[0]) {
+ w->data->bytes = 0;
+ code = mysendfile(w, "index.html");
+ }
+ else {
+ w->data->bytes = 0;
+ code = mysendfile(w, tok);
+ }
+
+ }
+ else {
+ strcpy(w->last_url, "not a valid response");
+
+ if(buf) debug(D_WEB_CLIENT_ACCESS, "%llu: Cannot understand '%s'.", w->id, buf);
+
+ code = 500;
+ w->data->bytes = 0;
+ strcpy(w->data->buffer, "I don't understand you...\r\n");
+ w->data->bytes = strlen(w->data->buffer);
+ }
+
+ // free url_decode() buffer
+ if(pointer_to_free) free(pointer_to_free);
+ }
+ else if(w->data->bytes > 8192) {
+ strcpy(w->last_url, "too big request");
+
+ debug(D_WEB_CLIENT_ACCESS, "%llu: Received request is too big.", w->id);
+
+ code = 400;
+ w->data->bytes = 0;
+ strcpy(w->data->buffer, "Received request is too big.\r\n");
+ w->data->bytes = strlen(w->data->buffer);
+ }
+ else {
+ // wait for more data
+ w->wait_receive = 1;
+ return;
+ }
+
+ if(w->data->bytes > w->data->size) {
+ error("%llu: memory overflow encountered (size is %ld, written %ld).", w->data->size, w->data->bytes);
+ }
+
+ gettimeofday(&w->tv_ready, NULL);
+ w->data->date = time(NULL);
+ w->data->sent = 0;
+
+ // prepare the HTTP response header
+ debug(D_WEB_CLIENT, "%llu: Generating HTTP header with response %d.", w->id, code);
+
+ char *content_type_string = "";
+ switch(w->data->contenttype) {
+ case CT_TEXT_HTML:
+ content_type_string = "text/html; charset=utf-8";
+ break;
+
+ case CT_APPLICATION_XML:
+ content_type_string = "application/xml; charset=utf-8";
+ break;
+
+ case CT_APPLICATION_JSON:
+ content_type_string = "application/json; charset=utf-8";
+ break;
+
+ case CT_APPLICATION_X_JAVASCRIPT:
+ content_type_string = "application/x-javascript; charset=utf-8";
+ break;
+
+ case CT_TEXT_CSS:
+ content_type_string = "text/css; charset=utf-8";
+ break;
+
+ case CT_TEXT_XML:
+ content_type_string = "text/xml; charset=utf-8";
+ break;
+
+ case CT_TEXT_XSL:
+ content_type_string = "text/xsl; charset=utf-8";
+ break;
+
+ case CT_APPLICATION_OCTET_STREAM:
+ content_type_string = "application/octet-stream";
+ break;
+
+ case CT_IMAGE_SVG_XML:
+ content_type_string = "image/svg+xml";
+ break;
+
+ case CT_APPLICATION_X_FONT_TRUETYPE:
+ content_type_string = "application/x-font-truetype";
+ break;
+
+ case CT_APPLICATION_X_FONT_OPENTYPE:
+ content_type_string = "application/x-font-opentype";
+ break;
+
+ case CT_APPLICATION_FONT_WOFF:
+ content_type_string = "application/font-woff";
+ break;
+
+ case CT_APPLICATION_VND_MS_FONTOBJ:
+ content_type_string = "application/vnd.ms-fontobject";
+ break;
+
+ default:
+ case CT_TEXT_PLAIN:
+ content_type_string = "text/plain; charset=utf-8";
+ break;
+ }
+
+ char *code_msg = "";
+ switch(code) {
+ case 200:
+ code_msg = "OK";
+ break;
+
+ case 307:
+ code_msg = "Temporary Redirect";
+ break;
+
+ case 400:
+ code_msg = "Bad Request";
+ break;
+
+ case 403:
+ code_msg = "Forbidden";
+ break;
+
+ case 404:
+ code_msg = "Not Found";
+ break;
+
+ default:
+ code_msg = "Internal Server Error";
+ break;
+ }
+
+ char date[100];
+ struct tm tm = *gmtime(&w->data->date);
+ strftime(date, sizeof(date), "%a, %d %b %Y %H:%M:%S %Z", &tm);
+
+ char custom_header[MAX_HTTP_HEADER_SIZE + 1] = "";
+ if(w->response_header[0])
+ strcpy(custom_header, w->response_header);
+
+ int headerlen = 0;
+ headerlen += snprintf(&w->response_header[headerlen], MAX_HTTP_HEADER_SIZE - headerlen,
+ "HTTP/1.1 %d %s\r\n"
+ "Connection: %s\r\n"
+ "Server: NetData Embedded HTTP Server\r\n"
+ "Content-Type: %s\r\n"
+ "Access-Control-Allow-Origin: *\r\n"
+ "Date: %s\r\n"
+ , code, code_msg
+ , w->keepalive?"keep-alive":"close"
+ , content_type_string
+ , date
+ );
+
+ if(custom_header[0])
+ headerlen += snprintf(&w->response_header[headerlen], MAX_HTTP_HEADER_SIZE - headerlen, "%s", custom_header);
+
+ if(w->mode == WEB_CLIENT_MODE_NORMAL) {
+ headerlen += snprintf(&w->response_header[headerlen], MAX_HTTP_HEADER_SIZE - headerlen,
+ "Expires: %s\r\n"
+ "Cache-Control: no-cache\r\n"
+ , date
+ );
+ }
+ else {
+ headerlen += snprintf(&w->response_header[headerlen], MAX_HTTP_HEADER_SIZE - headerlen,
+ "Cache-Control: public\r\n"
+ );
+ }
+
+ // if we know the content length, put it
+ if(!w->zoutput && (w->data->bytes || w->data->rbytes))
+ headerlen += snprintf(&w->response_header[headerlen], MAX_HTTP_HEADER_SIZE - headerlen,
+ "Content-Length: %ld\r\n"
+ , w->data->bytes?w->data->bytes:w->data->rbytes
+ );
+ else if(!w->zoutput)
+ w->keepalive = 0; // content-length is required for keep-alive
+
+ if(w->zoutput) {
+ headerlen += snprintf(&w->response_header[headerlen], MAX_HTTP_HEADER_SIZE - headerlen,
+ "Content-Encoding: gzip\r\n"
+ "Transfer-Encoding: chunked\r\n"
+ );
+ }
+
+ headerlen += snprintf(&w->response_header[headerlen], MAX_HTTP_HEADER_SIZE - headerlen, "\r\n");
+
+ // disable TCP_NODELAY, to buffer the header
+ int flag = 0;
+ if(setsockopt(w->ofd, IPPROTO_TCP, TCP_NODELAY, (char *) &flag, sizeof(int)) != 0) error("%llu: failed to disable TCP_NODELAY on socket.", w->id);
+
+ // sent the HTTP header
+ debug(D_WEB_DATA, "%llu: Sending response HTTP header of size %d: '%s'", w->id, headerlen, w->response_header);
+
+ bytes = send(w->ofd, w->response_header, headerlen, 0);
+ if(bytes != headerlen)
+ error("%llu: HTTP Header failed to be sent (I sent %d bytes but the system sent %d bytes).", w->id, headerlen, bytes);
+ else {
+ global_statistics_lock();
+ global_statistics.bytes_sent += bytes;
+ global_statistics_unlock();
+ }
+
+ // enable TCP_NODELAY, to send all data immediately at the next send()
+ flag = 1;
+ if(setsockopt(w->ofd, IPPROTO_TCP, TCP_NODELAY, (char *) &flag, sizeof(int)) != 0) error("%llu: failed to enable TCP_NODELAY on socket.", w->id);
+
+ // enable sending immediately if we have data
+ if(w->data->bytes) w->wait_send = 1;
+ else w->wait_send = 0;
+
+ // pretty logging
+ switch(w->mode) {
+ case WEB_CLIENT_MODE_NORMAL:
+ debug(D_WEB_CLIENT, "%llu: Done preparing the response. Sending data (%d bytes) to client.", w->id, w->data->bytes);
+ break;
+
+ case WEB_CLIENT_MODE_FILECOPY:
+ if(w->data->rbytes) {
+ debug(D_WEB_CLIENT, "%llu: Done preparing the response. Will be sending data file of %d bytes to client.", w->id, w->data->rbytes);
+ w->wait_receive = 1;
+
+ /*
+ // 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->data->rbytes);
+ if(len != w->data->rbytes) error("%llu: sendfile() should copy %ld bytes, but copied %ld. Falling back to manual copy.", w->id, w->data->rbytes, len);
+ else web_client_reset(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 %d.", w->id, w->mode);
+ break;
+ }
+}
+
+long web_client_send_chunk_header(struct web_client *w, int len)
+{
+ debug(D_DEFLATE, "%llu: OPEN CHUNK of %d bytes (hex: %x).", w->id, len, len);
+ char buf[1024];
+ sprintf(buf, "%X\r\n", len);
+ int bytes = send(w->ofd, buf, strlen(buf), MSG_DONTWAIT);
+
+ if(bytes > 0) debug(D_DEFLATE, "%llu: Sent chunk header %d bytes.", w->id, bytes);
+ else if(bytes == 0) debug(D_DEFLATE, "%llu: Did not send chunk header to the client.", w->id);
+ else debug(D_DEFLATE, "%llu: Failed to send chunk header to client. Reason: %s", w->id, strerror(errno));
+
+ return bytes;
+}
+
+long web_client_send_chunk_close(struct web_client *w)
+{
+ //debug(D_DEFLATE, "%llu: CLOSE CHUNK.", w->id);
+
+ int bytes = send(w->ofd, "\r\n", 2, MSG_DONTWAIT);
+
+ if(bytes > 0) debug(D_DEFLATE, "%llu: Sent chunk suffix %d bytes.", w->id, bytes);
+ else if(bytes == 0) debug(D_DEFLATE, "%llu: Did not send chunk suffix to the client.", w->id);
+ else debug(D_DEFLATE, "%llu: Failed to send chunk suffix to client. Reason: %s", w->id, strerror(errno));
+
+ return bytes;
+}
+
+long web_client_send_chunk_finalize(struct web_client *w)
+{
+ //debug(D_DEFLATE, "%llu: FINALIZE CHUNK.", w->id);
+
+ int bytes = send(w->ofd, "\r\n0\r\n\r\n", 7, MSG_DONTWAIT);
+
+ if(bytes > 0) debug(D_DEFLATE, "%llu: Sent chunk suffix %d bytes.", w->id, bytes);
+ else if(bytes == 0) debug(D_DEFLATE, "%llu: Did not send chunk suffix to the client.", w->id);
+ else debug(D_DEFLATE, "%llu: Failed to send chunk suffix to client. Reason: %s", w->id, strerror(errno));
+
+ return bytes;
+}
+
+#ifdef NETDATA_WITH_ZLIB
+long web_client_send_deflate(struct web_client *w)
+{
+ long bytes = 0, t = 0;
+
+ // when using compression,
+ // w->data->sent is the amount of bytes passed through compression
+
+ // debug(D_DEFLATE, "%llu: TEST w->data->bytes = %d, w->data->sent = %d, w->zhave = %d, w->zsent = %d, w->zstream.avail_in = %d, w->zstream.avail_out = %d, w->zstream.total_in = %d, w->zstream.total_out = %d.", w->id, w->data->bytes, w->data->sent, w->zhave, w->zsent, w->zstream.avail_in, w->zstream.avail_out, w->zstream.total_in, w->zstream.total_out);
+
+ if(w->data->bytes - w->data->sent == 0 && w->zstream.avail_in == 0 && w->zhave == w->zsent && w->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->data->sent != 0)
+ t += web_client_send_chunk_finalize(w);
+
+ // 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 && w->wait_receive && w->ifd != w->ofd && w->data->rbytes && w->data->rbytes > w->data->bytes) {
+ // we have to wait, more data will come
+ debug(D_WEB_CLIENT, "%llu: Waiting for more data to become available.", w->id);
+ w->wait_send = 0;
+ return(0);
+ }
+
+ if(w->keepalive == 0) {
+ debug(D_WEB_CLIENT, "%llu: Closing (keep-alive is not enabled). %ld bytes sent.", w->id, w->data->sent);
+ errno = 0;
+ return(-1);
+ }
+
+ // reset the client
+ web_client_reset(w);
+ debug(D_WEB_CLIENT, "%llu: Done sending all data on socket. Waiting for next request on the same socket.", w->id);
+ return(0);
+ }
+
+ if(w->zstream.avail_out == 0 && w->zhave == w->zsent) {
+ // compress more input data
+
+ // close the previous open chunk
+ if(w->data->sent != 0) t += web_client_send_chunk_close(w);
+
+ debug(D_DEFLATE, "%llu: Compressing %d bytes starting from %d.", w->id, (w->data->bytes - w->data->sent), w->data->sent);
+
+ // give the compressor all the data not passed through the compressor yet
+ if(w->data->bytes > w->data->sent) {
+ w->zstream.next_in = (Bytef *)&w->data->buffer[w->data->sent];
+ w->zstream.avail_in = (w->data->bytes - w->data->sent);
+ }
+
+ // reset the compressor output buffer
+ w->zstream.next_out = w->zbuffer;
+ w->zstream.avail_out = ZLIB_CHUNK;
+
+ // 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 && w->data->bytes == w->data->rbytes)) {
+ flush = Z_FINISH;
+ debug(D_DEFLATE, "%llu: Requesting Z_FINISH.", w->id);
+ }
+ else {
+ debug(D_DEFLATE, "%llu: Requesting Z_SYNC_FLUSH.", w->id);
+ }
+
+ // compress
+ if(deflate(&w->zstream, flush) == Z_STREAM_ERROR) {
+ error("%llu: Compression failed. Closing down client.", w->id);
+ web_client_reset(w);
+ return(-1);
+ }
+
+ w->zhave = ZLIB_CHUNK - w->zstream.avail_out;
+ w->zsent = 0;
+
+ // keep track of the bytes passed through the compressor
+ w->data->sent = w->data->bytes;
+
+ debug(D_DEFLATE, "%llu: Compression produced %d bytes.", w->id, w->zhave);
+
+ // open a new chunk
+ t += web_client_send_chunk_header(w, w->zhave);
+ }
+
+ bytes = send(w->ofd, &w->zbuffer[w->zsent], w->zhave - w->zsent, MSG_DONTWAIT);
+ if(bytes > 0) {
+ w->zsent += bytes;
+ if(t > 0) bytes += t;
+ debug(D_WEB_CLIENT, "%llu: Sent %d bytes.", w->id, bytes);
+ }
+ else if(bytes == 0) debug(D_WEB_CLIENT, "%llu: Did not send any bytes to the client.", w->id);
+ else debug(D_WEB_CLIENT, "%llu: Failed to send data to client. Reason: %s", w->id, strerror(errno));
+
+ return(bytes);
+}
+#endif // NETDATA_WITH_ZLIB
+
+long web_client_send(struct web_client *w)
+{
+#ifdef NETDATA_WITH_ZLIB
+ if(likely(w->zoutput)) return web_client_send_deflate(w);
+#endif // NETDATA_WITH_ZLIB
+
+ long bytes;
+
+ if(unlikely(w->data->bytes - w->data->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 && w->wait_receive && w->ifd != w->ofd && w->data->rbytes && w->data->rbytes > w->data->bytes) {
+ // we have to wait, more data will come
+ debug(D_WEB_CLIENT, "%llu: Waiting for more data to become available.", w->id);
+ w->wait_send = 0;
+ return(0);
+ }
+
+ if(unlikely(w->keepalive == 0)) {
+ debug(D_WEB_CLIENT, "%llu: Closing (keep-alive is not enabled). %ld bytes sent.", w->id, w->data->sent);
+ errno = 0;
+ return(-1);
+ }
+
+ web_client_reset(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->data->buffer[w->data->sent], w->data->bytes - w->data->sent, MSG_DONTWAIT);
+ if(likely(bytes > 0)) {
+ w->data->sent += bytes;
+ debug(D_WEB_CLIENT, "%llu: Sent %d bytes.", w->id, bytes);
+ }
+ else if(likely(bytes == 0)) debug(D_WEB_CLIENT, "%llu: Did not send any bytes to the client.", w->id);
+ else debug(D_WEB_CLIENT, "%llu: Failed to send data to client. Reason: %s", w->id, strerror(errno));
+
+ return(bytes);
+}
+
+long web_client_receive(struct web_client *w)
+{
+ // do we have any space for more data?
+ web_buffer_increase(w->data, WEB_DATA_LENGTH_INCREASE_STEP);
+
+ long left = w->data->size - w->data->bytes;
+ long bytes;
+
+ if(unlikely(w->mode == WEB_CLIENT_MODE_FILECOPY))
+ bytes = read(w->ifd, &w->data->buffer[w->data->bytes], (left-1));
+ else
+ bytes = recv(w->ifd, &w->data->buffer[w->data->bytes], left-1, MSG_DONTWAIT);
+
+ if(likely(bytes > 0)) {
+ int old = w->data->bytes;
+ w->data->bytes += bytes;
+ w->data->buffer[w->data->bytes] = '\0';
+
+ debug(D_WEB_CLIENT, "%llu: Received %d bytes.", w->id, bytes);
+ debug(D_WEB_DATA, "%llu: Received data: '%s'.", w->id, &w->data->buffer[old]);
+
+ if(w->mode == WEB_CLIENT_MODE_FILECOPY) {
+ w->wait_send = 1;
+ if(w->data->rbytes && w->data->bytes >= w->data->rbytes) w->wait_receive = 0;
+ }
+ }
+ else if(likely(bytes == 0)) {
+ debug(D_WEB_CLIENT, "%llu: Out of input 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.
+
+ if(w->mode == WEB_CLIENT_MODE_FILECOPY) {
+ // we are copying data from ifd to ofd
+ // let it finish copying...
+ w->wait_receive = 0;
+ debug(D_WEB_CLIENT, "%llu: Disabling input.", w->id);
+ }
+ else {
+ bytes = -1;
+ errno = 0;
+ }
+ }
+
+ return(bytes);
+}
+
+
+// --------------------------------------------------------------------------------------
+// the thread of a single client
+
+// 1. waits for input and output, using async I/O
+// 2. it processes HTTP requests
+// 3. it generates HTTP responses
+// 4. it copies data from input to output if mode is FILECOPY
+
+void *web_client_main(void *ptr)
+{
+ if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
+ error("Cannot set pthread cancel type to DEFERRED.");
+
+ if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
+ error("Cannot set pthread cancel state to ENABLE.");
+
+ struct timeval tv;
+ struct web_client *w = ptr;
+ int retval;
+ fd_set ifds, ofds, efds;
+ int fdmax = 0;
+
+ log_access("%llu: %s port %s connected on thread task id %d", w->id, w->client_ip, w->client_port, gettid());
+
+ for(;;) {
+ FD_ZERO (&ifds);
+ FD_ZERO (&ofds);
+ FD_ZERO (&efds);
+
+ FD_SET(w->ifd, &efds);
+
+ if(w->ifd != w->ofd)
+ FD_SET(w->ofd, &efds);
+
+ if (w->wait_receive) {
+ FD_SET(w->ifd, &ifds);
+ if(w->ifd > fdmax) fdmax = w->ifd;
+ }
+
+ if (w->wait_send) {
+ FD_SET(w->ofd, &ofds);
+ if(w->ofd > fdmax) fdmax = w->ofd;
+ }
+
+ tv.tv_sec = web_client_timeout;
+ tv.tv_usec = 0;
+
+ debug(D_WEB_CLIENT, "%llu: Waiting socket async I/O for %s %s", w->id, w->wait_receive?"INPUT":"", w->wait_send?"OUTPUT":"");
+ retval = select(fdmax+1, &ifds, &ofds, &efds, &tv);
+
+ if(retval == -1) {
+ debug(D_WEB_CLIENT_ACCESS, "%llu: LISTENER: select() failed.", w->id);
+ continue;
+ }
+ else if(!retval) {
+ // timeout
+ debug(D_WEB_CLIENT_ACCESS, "%llu: LISTENER: timeout.", w->id);
+ break;
+ }
+
+ if(FD_ISSET(w->ifd, &efds)) {
+ debug(D_WEB_CLIENT_ACCESS, "%llu: Received error on input socket (%s).", w->id, strerror(errno));
+ break;
+ }
+
+ if(FD_ISSET(w->ofd, &efds)) {
+ debug(D_WEB_CLIENT_ACCESS, "%llu: Received error on output socket (%s).", w->id, strerror(errno));
+ break;
+ }
+
+ if(w->wait_send && FD_ISSET(w->ofd, &ofds)) {
+ long bytes;
+ if((bytes = web_client_send(w)) < 0) {
+ debug(D_WEB_CLIENT, "%llu: Cannot send data to client. Closing client (ouput: %s).", w->id, strerror(errno));
+ errno = 0;
+ break;
+ }
+
+ global_statistics_lock();
+ global_statistics.bytes_sent += bytes;
+ global_statistics_unlock();
+ }
+
+ if(w->wait_receive && FD_ISSET(w->ifd, &ifds)) {
+ long bytes;
+ if((bytes = web_client_receive(w)) < 0) {
+ debug(D_WEB_CLIENT, "%llu: Cannot receive data from client. Closing client (input: %s).", w->id, strerror(errno));
+ errno = 0;
+ break;
+ }
+
+ global_statistics_lock();
+ global_statistics.bytes_received += bytes;
+ global_statistics_unlock();
+
+ if(w->mode == WEB_CLIENT_MODE_NORMAL) {
+ debug(D_WEB_CLIENT, "%llu: Attempting to process received data.", w->id);
+ web_client_process(w);
+ }
+ }
+ }
+
+ log_access("%llu: %s port %s disconnected from thread task id %d", w->id, w->client_ip, w->client_port, gettid());
+ debug(D_WEB_CLIENT, "%llu: done...", w->id);
+
+ web_client_reset(w);
+ w->obsolete = 1;
+
+ return NULL;
+}
projects / netdata.git / blobdiff