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-rw-r--r--[-rwxr-xr-x]src/web_client.c370
1 files changed, 230 insertions, 140 deletions
diff --git a/src/web_client.c b/src/web_client.c
index 127333554..6500a59b2 100755..100644
--- a/src/web_client.c
+++ b/src/web_client.c
@@ -14,6 +14,7 @@
#include <netinet/tcp.h>
#include <malloc.h>
#include <pwd.h>
+#include <grp.h>
#include <ctype.h>
#include "common.h"
@@ -27,9 +28,11 @@
#include "rrd2json.h"
#include "web_client.h"
+#include "../config.h"
#define INITIAL_WEB_DATA_LENGTH 16384
#define WEB_REQUEST_LENGTH 16384
+#define TOO_BIG_REQUEST 16384
int web_client_timeout = DEFAULT_DISCONNECT_IDLE_WEB_CLIENTS_AFTER_SECONDS;
int web_enable_gzip = 1;
@@ -230,10 +233,13 @@ uid_t web_files_uid(void)
static uid_t owner_uid = 0;
if(unlikely(!web_owner)) {
- web_owner = config_get("global", "web files owner", NETDATA_USER);
+ web_owner = config_get("global", "web files owner", config_get("global", "run as user", ""));
if(!web_owner || !*web_owner)
owner_uid = geteuid();
else {
+ // getpwnam() is not thread safe,
+ // but we have called this function once
+ // while single threaded
struct passwd *pw = getpwnam(web_owner);
if(!pw) {
error("User %s is not present. Ignoring option.", web_owner);
@@ -249,6 +255,34 @@ uid_t web_files_uid(void)
return(owner_uid);
}
+gid_t web_files_gid(void)
+{
+ static char *web_group = NULL;
+ static gid_t owner_gid = 0;
+
+ if(unlikely(!web_group)) {
+ web_group = config_get("global", "web files group", config_get("global", "web files owner", ""));
+ if(!web_group || !*web_group)
+ owner_gid = getegid();
+ else {
+ // getgrnam() is not thread safe,
+ // but we have called this function once
+ // while single threaded
+ struct group *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.\n", web_group);
+ owner_gid = gr->gr_gid;
+ }
+ }
+ }
+
+ return(owner_gid);
+}
+
int mysendfile(struct web_client *w, char *filename)
{
static char *web_dir = NULL;
@@ -268,7 +302,7 @@ int mysendfile(struct web_client *w, char *filename)
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);
- buffer_sprintf(w->response.data, "File '%s' cannot be served. Filename contains invalid character '%c'", *s);
+ buffer_sprintf(w->response.data, "File '%s' cannot be served. Filename contains invalid character '%c'", filename, *s);
return 400;
}
}
@@ -288,14 +322,21 @@ int mysendfile(struct web_client *w, char *filename)
struct stat stat;
if(lstat(webfilename, &stat) != 0) {
debug(D_WEB_CLIENT_ACCESS, "%llu: File '%s' is not found.", w->id, webfilename);
- buffer_sprintf(w->response.data, "File '%s' does not exist, or is not accessible.", filename);
+ buffer_sprintf(w->response.data, "File '%s' does not exist, or is not accessible.", webfilename);
return 404;
}
- // check if the file is owned by us
+ // check if the file is owned by expected user
if(stat.st_uid != web_files_uid()) {
- error("%llu: File '%s' is owned by user %d (I run as user %d). Access Denied.", w->id, webfilename, stat.st_uid, getuid());
- buffer_sprintf(w->response.data, "Access to file '%s' is not permitted.", filename);
+ error("%llu: File '%s' is owned by user %d (expected user %d). Access Denied.", w->id, webfilename, stat.st_uid, web_files_uid());
+ buffer_sprintf(w->response.data, "Access to file '%s' is not permitted.", webfilename);
+ return 403;
+ }
+
+ // check if the file is owned by expected group
+ if(stat.st_gid != web_files_gid()) {
+ error("%llu: File '%s' is owned by group %d (expected group %d). Access Denied.", w->id, webfilename, stat.st_gid, web_files_gid());
+ buffer_sprintf(w->response.data, "Access to file '%s' is not permitted.", webfilename);
return 403;
}
@@ -306,7 +347,7 @@ int mysendfile(struct web_client *w, char *filename)
if((stat.st_mode & S_IFMT) != S_IFREG) {
error("%llu: File '%s' is not a regular file. Access Denied.", w->id, webfilename);
- buffer_sprintf(w->response.data, "Access to file '%s' is not permitted.", filename);
+ buffer_sprintf(w->response.data, "Access to file '%s' is not permitted.", webfilename);
return 403;
}
@@ -318,12 +359,12 @@ int mysendfile(struct web_client *w, char *filename)
if(errno == EBUSY || errno == EAGAIN) {
error("%llu: File '%s' is busy, sending 307 Moved Temporarily to force retry.", w->id, webfilename);
buffer_sprintf(w->response.header, "Location: /" WEB_PATH_FILE "/%s\r\n", filename);
- buffer_sprintf(w->response.data, "The file '%s' is currently busy. Please try again later.", filename);
+ buffer_sprintf(w->response.data, "The file '%s' is currently busy. Please try again later.", webfilename);
return 307;
}
else {
error("%llu: Cannot open file '%s'.", w->id, webfilename);
- buffer_sprintf(w->response.data, "Cannot open file '%s'.", filename);
+ buffer_sprintf(w->response.data, "Cannot open file '%s'.", webfilename);
return 404;
}
}
@@ -747,36 +788,53 @@ int web_client_api_request_v1(struct web_client *w, char *url)
{
// get the command
char *tok = mystrsep(&url, "/?&");
- debug(D_WEB_CLIENT, "%llu: Searching for API v1 command '%s'.", w->id, tok);
-
- if(strcmp(tok, "data") == 0)
- return web_client_api_request_v1_data(w, url);
- else if(strcmp(tok, "chart") == 0)
- return web_client_api_request_v1_chart(w, url);
- else if(strcmp(tok, "charts") == 0)
- return web_client_api_request_v1_charts(w, url);
-
- buffer_flush(w->response.data);
- buffer_sprintf(w->response.data, "Unsupported v1 API command: %s", tok);
- return 404;
+ if(tok && *tok) {
+ debug(D_WEB_CLIENT, "%llu: Searching for API v1 command '%s'.", w->id, tok);
+
+ if(strcmp(tok, "data") == 0)
+ return web_client_api_request_v1_data(w, url);
+ else if(strcmp(tok, "chart") == 0)
+ return web_client_api_request_v1_chart(w, url);
+ else if(strcmp(tok, "charts") == 0)
+ return web_client_api_request_v1_charts(w, url);
+ else {
+ buffer_flush(w->response.data);
+ buffer_sprintf(w->response.data, "Unsupported v1 API command: %s", tok);
+ return 404;
+ }
+ }
+ else {
+ buffer_flush(w->response.data);
+ buffer_sprintf(w->response.data, "API v1 command?");
+ return 400;
+ }
}
int web_client_api_request(struct web_client *w, char *url)
{
// get the api version
char *tok = mystrsep(&url, "/?&");
- debug(D_WEB_CLIENT, "%llu: Searching for API version '%s'.", w->id, tok);
-
- if(strcmp(tok, "v1") == 0)
- return web_client_api_request_v1(w, url);
-
- buffer_flush(w->response.data);
- buffer_sprintf(w->response.data, "Unsupported API version: %s", tok);
- return 404;
+ 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(w, url);
+ else {
+ buffer_flush(w->response.data);
+ buffer_sprintf(w->response.data, "Unsupported API version: %s", tok);
+ return 404;
+ }
+ }
+ else {
+ buffer_flush(w->response.data);
+ buffer_sprintf(w->response.data, "Which API version?");
+ return 400;
+ }
}
int web_client_data_request(struct web_client *w, char *url, int datasource_type)
{
+ RRDSET *st = NULL;
+
char *args = strchr(url, '?');
if(args) {
*args='\0';
@@ -785,11 +843,14 @@ int web_client_data_request(struct web_client *w, char *url, int datasource_type
// 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(tok && *tok) {
+ debug(D_WEB_CLIENT, "%llu: Searching for RRD data with name '%s'.", w->id, tok);
+ 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
@@ -816,34 +877,36 @@ int web_client_data_request(struct web_client *w, char *url, int datasource_type
if(url) {
// parse the group count required
tok = mystrsep(&url, "/");
- if(tok) group_count = atoi(tok);
+ if(tok && *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(tok && *tok) {
+ 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(tok && *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(tok && *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;
+ if(tok && *tok && strcmp(tok, "nonzero") == 0) nonzero = 1;
}
w->response.data->contenttype = CT_APPLICATION_JSON;
@@ -862,9 +925,9 @@ int web_client_data_request(struct web_client *w, char *url, int datasource_type
while(args) {
tok = mystrsep(&args, "&");
- if(tok) {
+ if(tok && *tok) {
char *name = mystrsep(&tok, "=");
- if(name && strcmp(name, "tqx") == 0) {
+ if(name && *name && strcmp(name, "tqx") == 0) {
char *key = mystrsep(&tok, ":");
char *value = mystrsep(&tok, ";");
if(key && value && *key && *value) {
@@ -1056,118 +1119,142 @@ void web_client_process(struct web_client *w) {
w->last_url[URL_MAX] = '\0';
tok = mystrsep(&url, "/?");
+ if(tok && *tok) {
+ debug(D_WEB_CLIENT, "%llu: Processing command '%s'.", w->id, tok);
- debug(D_WEB_CLIENT, "%llu: Processing command '%s'.", w->id, tok);
-
- if(strcmp(tok, "api") == 0) {
- // the client is requesting api access
- datasource_type = DATASOURCE_JSON;
- code = web_client_api_request(w, url);
- }
-#ifdef NETDATA_INTERNAL_CHECKS
- else if(strcmp(tok, "exit") == 0) {
- netdata_exit = 1;
- code = 200;
- w->response.data->contenttype = CT_TEXT_PLAIN;
- buffer_flush(w->response.data);
- buffer_strcat(w->response.data, "will do");
- }
-#endif
- else 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
- buffer_flush(w->response.data);
- code = mysendfile(w, tok);
+ if(strcmp(tok, "api") == 0) {
+ // the client is requesting api access
+ datasource_type = DATASOURCE_JSON;
+ code = web_client_api_request(w, url);
}
- else {
+#ifdef NETDATA_INTERNAL_CHECKS
+ else if(strcmp(tok, "exit") == 0) {
+ netdata_exit = 1;
code = 200;
- debug(D_WEB_CLIENT_ACCESS, "%llu: Sending %s.json of RRD_STATS...", w->id, st->name);
- w->response.data->contenttype = CT_APPLICATION_JSON;
+ w->response.data->contenttype = CT_TEXT_PLAIN;
buffer_flush(w->response.data);
- rrd_stats_graph_json(st, url, w->response.data);
+ buffer_strcat(w->response.data, "will do");
+ }
+#endif
+ else 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, "/?&");
+ 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(tok);
+ if(!st) st = rrdset_find(tok);
+ if(!st) {
+ // we don't have it
+ // try to send a file with that name
+ buffer_flush(w->response.data);
+ code = mysendfile(w, tok);
+ }
+ else {
+ code = 200;
+ debug(D_WEB_CLIENT_ACCESS, "%llu: Sending %s.json of RRD_STATS...", w->id, st->name);
+ w->response.data->contenttype = CT_APPLICATION_JSON;
+ buffer_flush(w->response.data);
+ rrd_stats_graph_json(st, url, w->response.data);
+ }
+ }
+ else {
+ code = 400;
+ buffer_flush(w->response.data);
+ buffer_strcat(w->response.data, "Graph name?\r\n");
+ }
}
- }
#ifdef NETDATA_INTERNAL_CHECKS
- else if(strcmp(tok, "debug") == 0) {
- buffer_flush(w->response.data);
+ else if(strcmp(tok, "debug") == 0) {
+ buffer_flush(w->response.data);
- // 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;
- buffer_sprintf(w->response.data, "Chart %s is not found.\r\n", tok);
- debug(D_WEB_CLIENT_ACCESS, "%llu: %s is not found.", w->id, tok);
+ // 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(tok);
+ if(!st) st = rrdset_find(tok);
+ if(!st) {
+ code = 404;
+ buffer_sprintf(w->response.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;
+ buffer_sprintf(w->response.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 {
+ code = 500;
+ buffer_flush(w->response.data);
+ buffer_strcat(w->response.data, "debug which chart?\r\n");
+ }
}
- else {
+ else if(strcmp(tok, "mirror") == 0) {
code = 200;
- debug_flags |= D_RRD_STATS;
- st->debug = st->debug?0:1;
- buffer_sprintf(w->response.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);
+ debug(D_WEB_CLIENT_ACCESS, "%llu: Mirroring...", w->id);
- // replace the zero bytes with spaces
- buffer_char_replace(w->response.data, '\0', ' ');
+ // 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
- }
+ // just leave the buffer as is
+ // it will be copied back to the client
+ }
#endif
- else if(strcmp(tok, "list") == 0) {
- code = 200;
+ else if(strcmp(tok, "list") == 0) {
+ code = 200;
- debug(D_WEB_CLIENT_ACCESS, "%llu: Sending list of RRD_STATS...", w->id);
+ debug(D_WEB_CLIENT_ACCESS, "%llu: Sending list of RRD_STATS...", w->id);
- buffer_flush(w->response.data);
- RRDSET *st = rrdset_root;
+ buffer_flush(w->response.data);
+ RRDSET *st = rrdset_root;
- for ( ; st ; st = st->next )
- buffer_sprintf(w->response.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);
+ for ( ; st ; st = st->next )
+ buffer_sprintf(w->response.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->response.data->contenttype = CT_APPLICATION_JSON;
- buffer_flush(w->response.data);
- rrd_stats_all_json(w->response.data);
- }
- else if(strcmp(tok, "netdata.conf") == 0) {
- code = 200;
- debug(D_WEB_CLIENT_ACCESS, "%llu: Sending netdata.conf ...", w->id);
+ w->response.data->contenttype = CT_APPLICATION_JSON;
+ buffer_flush(w->response.data);
+ rrd_stats_all_json(w->response.data);
+ }
+ else if(strcmp(tok, "netdata.conf") == 0) {
+ code = 200;
+ debug(D_WEB_CLIENT_ACCESS, "%llu: Sending netdata.conf ...", w->id);
- w->response.data->contenttype = CT_TEXT_PLAIN;
- buffer_flush(w->response.data);
- generate_config(w->response.data, 0);
+ w->response.data->contenttype = CT_TEXT_PLAIN;
+ buffer_flush(w->response.data);
+ generate_config(w->response.data, 0);
+ }
+ else {
+ char filename[FILENAME_MAX+1];
+ url = filename;
+ strncpy(filename, w->last_url, FILENAME_MAX);
+ filename[FILENAME_MAX] = '\0';
+ tok = mystrsep(&url, "?");
+ buffer_flush(w->response.data);
+ code = mysendfile(w, (tok && *tok)?tok:"/");
+ }
}
else {
char filename[FILENAME_MAX+1];
@@ -1190,16 +1277,19 @@ void web_client_process(struct web_client *w) {
}
// free url_decode() buffer
- if(pointer_to_free) free(pointer_to_free);
+ if(pointer_to_free) {
+ free(pointer_to_free);
+ pointer_to_free = NULL;
+ }
}
- else if(w->response.data->len > 8192) {
+ else if(w->response.data->len > TOO_BIG_REQUEST) {
strcpy(w->last_url, "too big request");
- debug(D_WEB_CLIENT_ACCESS, "%llu: Received request is too big.", w->id);
+ debug(D_WEB_CLIENT_ACCESS, "%llu: Received request is too big (%zd bytes).", w->id, w->response.data->len);
code = 400;
buffer_flush(w->response.data);
- buffer_strcat(w->response.data, "Received request is too big.\r\n");
+ buffer_sprintf(w->response.data, "Received request is too big (%zd bytes).\r\n", w->response.data->len);
}
else {
// wait for more data
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-24 02:08:44 +0000