Merging upstream version 1.29.0.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
author: Daniel Baumann <daniel.baumann@progress-linux.org> 2021-02-07 11:49:00 +0000
committer: Daniel Baumann <daniel.baumann@progress-linux.org> 2021-02-07 12:42:05 +0000
commit: 2e85f9325a797977eea9dfea0a925775ddd211d9 (patch)
tree: 452c7f30d62fca5755f659b99e4e53c7b03afc21 /web/server
parent: Releasing debian version 1.19.0-4. (diff)
download: netdata-2e85f9325a797977eea9dfea0a925775ddd211d9.tar.xz
netdata-2e85f9325a797977eea9dfea0a925775ddd211d9.zip
8 files changed, 221 insertions, 1536 deletions
diff --git a/web/server/Makefile.in b/web/server/Makefile.in
deleted file mode 100644
index c58638e65..000000000
--- a/web/server/Makefile.in
+++ /dev/null
@@ -1,703 +0,0 @@
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diff --git a/web/server/README.md b/web/server/README.md
index 486617354..fbf3151ba 100644
--- a/web/server/README.md
+++ b/web/server/README.md
@@ -1,3 +1,9 @@
+<!--
+title: "Web server"
+description: "The Netdata Agent's local static-threaded web server serves dashboards and real-time visualizations with security and DDoS protection."
+custom_edit_url: https://github.com/netdata/netdata/edit/master/web/server/README.md
+-->
+
 # Web server
 
 The Netdata web server runs as `static-threaded`, i.e. with a fixed, configurable number of threads.
@@ -5,14 +11,14 @@ It uses non-blocking I/O and respects the `keep-alive` HTTP header to serve mult
 
 ## Configuration
 
-You can disable the web server by editing `netdata.conf` and setting:
+Disable the web server by editing `netdata.conf` and setting:
 
 ```
 [web]
     mode = none
 ```
 
-With the web server enabled, you can control the number of threads and sockets with the following settings:
+With the web server enabled, control the number of threads and sockets with the following settings:
 
 ```
 [web]
@@ -26,7 +32,7 @@ The `web server max sockets` setting is automatically adjusted to 50% of the max
 
 ### Binding Netdata to multiple ports
 
-Netdata can bind to multiple IPs and ports, offering access to different services on each. Up to 100 sockets can be used (you can increase it at compile time with `CFLAGS="-DMAX_LISTEN_FDS=200" ./netdata-installer.sh ...`).
+Netdata can bind to multiple IPs and ports, offering access to different services on each. Up to 100 sockets can be used (increase it at compile time with `CFLAGS="-DMAX_LISTEN_FDS=200" ./netdata-installer.sh ...`).
 
 The ports to bind are controlled via `[web].bind to`, like this:
 
@@ -41,7 +47,7 @@ Using the above, Netdata will bind to:
 -   IPv4 127.0.0.1 at port 19999 (port was used from `default port`). Only the UI (dashboard) and the read API will be accessible on this port. Both HTTP and HTTPS requests will be accepted.
 -   IPv4 10.1.1.1 at port 19998. The management API and `netdata.conf` will be accessible on this port.
 -   All the IPs `hostname` resolves to (both IPv4 and IPv6 depending on the resolved IPs) at port 19997. Only badges will be accessible on this port.
--   All IPv6 IPs at port 19996. Only metric streaming requests from other Netdata agents will be accepted on this port. Only encrypted streams will be allowed (i.e. slaves also need to be [configured for TLS](../../streaming).
+-   All IPv6 IPs at port 19996. Only metric streaming requests from other Netdata agents will be accepted on this port. Only encrypted streams will be allowed (i.e. child nodes also need to be [configured for TLS](/streaming/README.md).
 -   All the IPs `localhost` resolves to (both IPv4 and IPv6 depending the resolved IPs) at port 19996. This port will only accept registry API requests.
 -   All IPv4 and IPv6 IPs at port `http` as set in `/etc/services`. Only the UI (dashboard) and the read API will be accessible on this port. 
 -   Unix domain socket `/run/netdata/netdata.sock`. All requests are serviceable on this socket. Note that in some OSs like Fedora, every service sees a different `/tmp`, so don't create a Unix socket under `/tmp`. `/run` or `/var/run` is suggested.
@@ -60,11 +66,15 @@ The API requests are serviced as follows:
 
 ### Enabling TLS support
 
-Since v1.16.0, Netdata supports encrypted HTTP connections to the web server, plus encryption of streaming data between a slave and its master, via the TLS 1.2 protocol.
+Since v1.16.0, Netdata supports encrypted HTTP connections to the web server, plus encryption of streaming data to a
+parent from its child nodes, via the TLS protocol.
+
+Inbound unix socket connections are unaffected, regardless of the TLS settings.
 
-Inbound unix socket connections are unaffected, regardless of the TLS settings.\
-??? info "Differences in TLS and SSL terminology"
-    While Netdata uses Transport Layer Security (TLS) 1.2 to encrypt communications rather than the obsolete SSL protocol, it's still common practice to refer to encrypted web connections as `SSL`. Many vendors, like Nginx and even Netdata itself, use `SSL` in configuration files, whereas documentation will always refer to encrypted communications as `TLS` or `TLS/SSL`.
+> While Netdata uses Transport Layer Security (TLS) 1.2 to encrypt communications rather than the obsolete SSL protocol,
+> it's still common practice to refer to encrypted web connections as `SSL`. Many vendors, like Nginx and even Netdata
+> itself, use `SSL` in configuration files, whereas documentation will always refer to encrypted communications as `TLS`
+> or `TLS/SSL`.
 
 To enable TLS, provide the path to your certificate and private key in the `[web]` section of `netdata.conf`:
 
@@ -74,29 +84,44 @@ To enable TLS, provide the path to your certificate and private key in the `[web
 	ssl certificate = /etc/netdata/ssl/cert.pem
 ```
 
-Both files must be readable by the `netdata` user. If either of these files do not exist or are unreadable, Netdata will fall back to HTTP. For a master/slave connection, only the master needs these settings.
+Both files must be readable by the `netdata` user. If either of these files do not exist or are unreadable, Netdata will fall back to HTTP. For a parent-child connection, only the parent needs these settings.
 
-For test purposes, you can generate self-signed certificates with the following command:
+For test purposes, generate self-signed certificates with the following command:
 
 ```bash
 openssl req -newkey rsa:2048 -nodes -sha512 -x509 -days 365 -keyout key.pem -out cert.pem
 ```
 
-!!! note
-    If you use 4096 bits for your key and the certificate, Netdata will need more CPU to process the communication. `rsa4096` can be up to 4 times slower than `rsa2048`, so we recommend using 2048 bits. You can verify the difference by running:
+> If you use 4096 bits for your key and the certificate, Netdata will need more CPU to process the communication.
+> `rsa4096` can be up to 4 times slower than `rsa2048`, so we recommend using 2048 bits. Verify the difference
+> by running:
+>
+> ```sh
+> openssl speed rsa2048 rsa4096
+> ```
+
+### Select TLS version
+
+Beginning with version 1.21, specify the TLS version and the ciphers that you want to use:
 
-```sh
-openssl speed rsa2048 rsa4096
+```conf
+[web]
+    tls version = 1.3
+    tls ciphers = TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256:TLS_AES_128_GCM_SHA256
 ```
 
+If you do not specify these options, Netdata will use the highest available protocol version on your system and the default cipher list for that protocol provided by your TLS implementation.
+
+While Netdata accepts all the TLS version as arguments (`1` or `1.0`, `1.1`, `1.2` and `1.3`), we recommend you use `1.3` for the most secure encryption.
+
 #### TLS/SSL enforcement
 
 When the certificates are defined and unless any other options are provided, a Netdata server will:
 
 -   Redirect all incoming HTTP web server requests to HTTPS. Applies to the dashboard, the API, `netdata.conf` and badges.
--   Allow incoming slave connections to use both unencrypted and encrypted communications for streaming.
+-   Allow incoming child connections to use both unencrypted and encrypted communications for streaming.
 
-To change this behavior, you need to modify the `bind to` setting in the `[web]` section of `netdata.conf`. At the end of each port definition, you can append `^SSL=force` or `^SSL=optional`. What happens with these settings differs, depending on whether the port is used for HTTP/S requests, or for streaming.
+To change this behavior, you need to modify the `bind to` setting in the `[web]` section of `netdata.conf`. At the end of each port definition, append `^SSL=force` or `^SSL=optional`. What happens with these settings differs, depending on whether the port is used for HTTP/S requests, or for streaming.
 
 | SSL setting | HTTP requests|HTTPS requests|Unencrypted Streams|Encrypted Streams|
 |:---------:|:-----------:|:------------:|:-----------------:|:----------------|
@@ -111,7 +136,7 @@ Example:
     bind to = *=dashboard|registry|badges|management|streaming|netdata.conf^SSL=force
 ```
 
-For information how to configure the slaves to use TLS, check [securing the communication](../../streaming#securing-streaming-communications) in the streaming documentation. There you will find additional details on the expected behavior for client and server nodes, when their respective TLS options are enabled.
+For information how to configure the child to use TLS, check [securing the communication](/streaming/README.md#securing-streaming-communications) in the streaming documentation. There you will find additional details on the expected behavior for client and server nodes, when their respective TLS options are enabled.
 
 When we define the use of SSL in a Netdata agent for different ports,  Netdata will apply the behavior specified on each port. For example, using the configuration line below:
 
@@ -123,7 +148,7 @@ When we define the use of SSL in a Netdata agent for different ports,  Netdata w
 Netdata will:
 
 -   Force all HTTP requests to the default port to be redirected to HTTPS (same port).
--   Refuse unencrypted streaming connections from slaves on the default port.
+-   Refuse unencrypted streaming connections from child nodes on the default port.
 -   Allow both HTTP and HTTPS requests to port 20000 for `netdata.conf`
 -   Force HTTP requests to port 20001 to be redirected to HTTPS (same port). Only allow requests for the dashboard, the read API and the registry on port 20001.
 
@@ -133,7 +158,7 @@ When you start using Netdata with TLS, you may find errors in the Netdata log, w
 
 Most of the time, these errors are due to incompatibilities between your browser's options related to TLS/SSL protocols and Netdata's internal configuration. The most common error is `error:00000006:lib(0):func(0):EVP lib`. 
 
-In the near future, Netdata will allow our users to change the internal configuration to avoid similar errors. Until then, we're recommending only the most common and safe encryption protocols, which you can find above.
+In the near future, Netdata will allow our users to change the internal configuration to avoid similar errors. Until then, we're recommending only the most common and safe encryption protocols listed above.
 
 ### Access lists
 
@@ -160,14 +185,14 @@ Netdata supports access lists in `netdata.conf`:
 
 -   `allow badges from` checks if the API request is for a badge. Badges are not matched by `allow dashboard from`.
 
--   `allow streaming from` checks if the slave willing to stream metrics to this Netdata is allowed.
-     This can be controlled per API KEY and MACHINE GUID in [stream.conf](../../streaming/stream.conf).
-     The setting in `netdata.conf` is checked before the ones in [stream.conf](../../streaming/stream.conf).
+-   `allow streaming from` checks if the child willing to stream metrics to this Netdata is allowed.
+     This can be controlled per API KEY and MACHINE GUID in `stream.conf`.
+     The setting in `netdata.conf` is checked before the ones in `stream.conf`.
 
 -   `allow netdata.conf from` checks the IP to allow `http://netdata.host:19999/netdata.conf`.
      The IPs listed are all the private IPv4 addresses, including link local IPv6 addresses. Keep in mind that connections to Netdata API ports are filtered by `allow connections from`. So, IPs allowed by `allow netdata.conf from` should also be allowed by `allow connections from`.
 
--   `allow management from` checks the IPs to allow API management calls. Management via the API is currently supported for [health](../api/health/#health-management-api)
+-   `allow management from` checks the IPs to allow API management calls. Management via the API is currently supported for [health](/web/api/health/README.md#health-management-api)
 
 In order to check the FQDN of the connection without opening the Netdata agent to DNS-spoofing, a reverse-dns record
 must be setup for the connecting host. At connection time the reverse-dns of the peer IP address is resolved, and
@@ -193,14 +218,14 @@ present that may match DNS FQDNs.
 
 |setting|default|info|
 |:-----:|:-----:|:---|
-|ses max window|`15`|See [single exponential smoothing](../api/queries/des/)|
-|des max window|`15`|See [double exponential smoothing](../api/queries/des/)|
+|ses max window|`15`|See [single exponential smoothing](/web/api/queries/des/README.md)|
+|des max window|`15`|See [double exponential smoothing](/web/api/queries/des/README.md)|
 |listen backlog|`4096`|The port backlog. Check `man 2 listen`.|
 |web files owner|`netdata`|The user that owns the web static files. Netdata will refuse to serve a file that is not owned by this user, even if it has read access to that file. If the user given is not found, Netdata will only serve files owned by user given in `run as user`.|
 |web files group|`netdata`|If this is set, Netdata will check if the file is owned by this group and refuse to serve the file if it's not.|
 |disconnect idle clients after seconds|`60`|The time in seconds to disconnect web clients after being totally idle.|
 |timeout for first request|`60`|How long to wait for a client to send a request before closing the socket. Prevents slow request attacks.|
-|accept a streaming request every seconds|`0`|Can be used to set a limit on how often a master Netdata server will accept streaming requests from the slaves in a [streaming and replication setup](../../streaming)|
+|accept a streaming request every seconds|`0`|Can be used to set a limit on how often a parent node will accept streaming requests from child nodes in a [streaming and replication setup](/streaming/README.md)|
 |respect do not track policy|`no`|If set to `yes`, will respect the client's browser preferences on storing cookies.|
 |x-frame-options response header||[Avoid clickjacking attacks, by ensuring that the content is not embedded into other sites](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Frame-Options).|
 |enable gzip compression|`yes`|When set to `yes`, Netdata web responses will be GZIP compressed, if the web client accepts such responses.|
diff --git a/web/server/static/Makefile.in b/web/server/static/Makefile.in
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-install-data-am:
-
-install-dvi: install-dvi-recursive
-
-install-dvi-am:
-
-install-exec-am:
-
-install-html: install-html-recursive
-
-install-html-am:
-
-install-info: install-info-recursive
-
-install-info-am:
-
-install-man:
-
-install-pdf: install-pdf-recursive
-
-install-pdf-am:
-
-install-ps: install-ps-recursive
-
-install-ps-am:
-
-installcheck-am:
-
-maintainer-clean: maintainer-clean-recursive
-	-rm -f Makefile
-maintainer-clean-am: distclean-am maintainer-clean-generic
-
-mostlyclean: mostlyclean-recursive
-
-mostlyclean-am: mostlyclean-generic
-
-pdf: pdf-recursive
-
-pdf-am:
-
-ps: ps-recursive
-
-ps-am:
-
-uninstall-am:
-
-.MAKE: $(am__recursive_targets) install-am install-strip
-
-.PHONY: $(am__recursive_targets) CTAGS GTAGS TAGS all all-am check \
-	check-am clean clean-generic cscopelist-am ctags ctags-am \
-	distclean distclean-generic distclean-tags distdir dvi dvi-am \
-	html html-am info info-am install install-am install-data \
-	install-data-am install-dvi install-dvi-am install-exec \
-	install-exec-am install-html install-html-am install-info \
-	install-info-am install-man install-pdf install-pdf-am \
-	install-ps install-ps-am install-strip installcheck \
-	installcheck-am installdirs installdirs-am maintainer-clean \
-	maintainer-clean-generic mostlyclean mostlyclean-generic pdf \
-	pdf-am ps ps-am tags tags-am uninstall uninstall-am
-
-.PRECIOUS: Makefile
-
-
-# Tell versions [3.59,3.63) of GNU make to not export all variables.
-# Otherwise a system limit (for SysV at least) may be exceeded.
-.NOEXPORT:
diff --git a/web/server/static/README.md b/web/server/static/README.md
index eeba0e94d..e095f2ef3 100644
--- a/web/server/static/README.md
+++ b/web/server/static/README.md
@@ -1,3 +1,9 @@
+<!--
+title: "`static-threaded` web server"
+description: "The Netdata Agent's static-threaded web server spawns a fixed number of threads that listen to web requests and uses non-blocking I/O."
+custom_edit_url: https://github.com/netdata/netdata/edit/master/web/server/static/README.md
+-->
+
 # `static-threaded` web server
 
 The `static-threaded` web server spawns a fixed number of threads.
@@ -7,4 +13,5 @@ The kernel distributes the incoming requests to them.
 Each thread uses non-blocking I/O so it can serve any number of web requests in parallel.
 
 This web server respects the `keep-alive` HTTP header to serve multiple HTTP requests via the same connection. 
+
 [![analytics](https://www.google-analytics.com/collect?v=1&aip=1&t=pageview&_s=1&ds=github&dr=https%3A%2F%2Fgithub.com%2Fnetdata%2Fnetdata&dl=https%3A%2F%2Fmy-netdata.io%2Fgithub%2Fweb%2Fserver%2Fstatic%2FREADME&_u=MAC~&cid=5792dfd7-8dc4-476b-af31-da2fdb9f93d2&tid=UA-64295674-3)](<>)
diff --git a/web/server/static/static-threaded.c b/web/server/static/static-threaded.c
index b9c91ef14..93e36def7 100644
--- a/web/server/static/static-threaded.c
+++ b/web/server/static/static-threaded.c
@@ -248,8 +248,6 @@ static int web_server_rcv_callback(POLLINFO *pi, short int *events) {
     struct web_client *w = (struct web_client *)pi->data;
     int fd = pi->fd;
 
-    //BRING IT TO HERE
-
     if(unlikely(web_client_receive(w) < 0))
         return -1;
 
diff --git a/web/server/web_client.c b/web/server/web_client.c
index 537152660..f0856fb17 100644
--- a/web/server/web_client.c
+++ b/web/server/web_client.c
@@ -199,6 +199,7 @@ void web_client_request_done(struct web_client *w) {
         w->response.zstream.total_in = 0;
         w->response.zstream.total_out = 0;
         w->response.zinitialized = 0;
+        w->flags &= ~WEB_CLIENT_CHUNKED_TRANSFER;
     }
 #endif // NETDATA_WITH_ZLIB
 }
@@ -501,6 +502,7 @@ void web_client_enable_deflate(struct web_client *w, int gzip) {
     w->response.zsent = 0;
     w->response.zoutput = 1;
     w->response.zinitialized = 1;
+    w->flags |= WEB_CLIENT_CHUNKED_TRANSFER;
 
     debug(D_DEFLATE, "%llu: Initialized compression.", w->id);
 }
@@ -733,7 +735,8 @@ const char *web_response_code_to_string(int code) {
 }
 
 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_donottrack = 0, hash_useragent = 0, hash_authorization = 0, hash_host = 0;
+    static uint32_t hash_origin = 0, hash_connection = 0, hash_donottrack = 0, hash_useragent = 0,
+                    hash_authorization = 0, hash_host = 0, hash_forwarded_proto = 0, hash_forwarded_host = 0;
 #ifdef NETDATA_WITH_ZLIB
     static uint32_t hash_accept_encoding = 0;
 #endif
@@ -748,6 +751,8 @@ static inline char *http_header_parse(struct web_client *w, char *s, int parse_u
         hash_useragent = simple_uhash("User-Agent");
         hash_authorization = simple_uhash("X-Auth-Token");
         hash_host = simple_uhash("Host");
+        hash_forwarded_proto = simple_uhash("X-Forwarded-Proto");
+        hash_forwarded_host = simple_uhash("X-Forwarded-Host");
     }
 
     char *e = s;
@@ -809,6 +814,15 @@ static inline char *http_header_parse(struct web_client *w, char *s, int parse_u
         }
     }
 #endif /* NETDATA_WITH_ZLIB */
+#ifdef ENABLE_HTTPS
+    else if(hash == hash_forwarded_proto && !strcasecmp(s, "X-Forwarded-Proto")) {
+        if(strcasestr(v, "https"))
+            w->ssl.flags |= NETDATA_SSL_PROXY_HTTPS;
+    }
+#endif
+    else if(hash == hash_forwarded_host && !strcasecmp(s, "X-Forwarded-Host")){
+        strncpyz(w->forwarded_host, v, ((size_t)(ve - v) < sizeof(w->server_host)-1 ? (size_t)(ve - v) : sizeof(w->server_host)-1));
+    }
 
     *e = ':';
     *ve = '\r';
@@ -850,7 +864,7 @@ static inline char *web_client_valid_method(struct web_client *w, char *s) {
                 copyme += 9;
                 char *end = strchr(copyme,'&');
                 if(end){
-                    size_t length = end - copyme;
+                    size_t length = MIN(255, end - copyme);
                     memcpy(hostname,copyme,length);
                     hostname[length] = 0X00;
                 }
@@ -863,7 +877,7 @@ static inline char *web_client_valid_method(struct web_client *w, char *s) {
                 memcpy(hostname,"not available",13);
                 hostname[13] = 0x00;
             }
-            error("The server is configured to always use encrypt connection, please enable the SSL on slave with hostname '%s'.",hostname);
+            error("The server is configured to always use encrypted connections, please enable the SSL on child with hostname '%s'.",hostname);
             s = NULL;
         }
 #endif
@@ -1074,6 +1088,10 @@ static inline HTTP_VALIDATION http_request_validate(struct web_client *w) {
                     if ((w->ssl.conn) && ((w->ssl.flags & NETDATA_SSL_NO_HANDSHAKE) && (web_client_is_using_ssl_force(w) || web_client_is_using_ssl_default(w)) && (w->mode != WEB_CLIENT_MODE_STREAM))  ) {
                         w->header_parse_tries = 0;
                         w->header_parse_last_size = 0;
+                        // The client will be redirected for Netdata and we are preserving the original request.
+                        *ue = '\0';
+                        strncpyz(w->last_url, encoded_url, NETDATA_WEB_REQUEST_URL_SIZE);
+                        *ue = ' ';
                         web_client_disable_wait_receive(w);
                         return HTTP_VALIDATION_REDIRECT;
                     }
@@ -1118,7 +1136,7 @@ static inline ssize_t web_client_send_data(struct web_client *w,const void *buf,
     return bytes;
 }
 
-static inline void web_client_send_http_header(struct web_client *w) {
+void web_client_build_http_header(struct web_client *w) {
     if(unlikely(w->response.code != HTTP_RESP_OK))
         buffer_no_cacheable(w->response.data);
 
@@ -1148,39 +1166,30 @@ static inline void web_client_send_http_header(struct web_client *w) {
         strftime(edate, sizeof(edate), "%a, %d %b %Y %H:%M:%S %Z", tm);
     }
 
-    char headerbegin[8328];
     if (w->response.code == HTTP_RESP_MOVED_PERM) {
-        memcpy(headerbegin,"\r\nLocation: https://",20);
-        size_t headerlength = strlen(w->server_host);
-        memcpy(&headerbegin[20],w->server_host,headerlength);
-        headerlength += 20;
-        size_t tmp = strlen(w->last_url);
-        memcpy(&headerbegin[headerlength],w->last_url,tmp);
-        headerlength += tmp;
-        memcpy(&headerbegin[headerlength],"\r\n",2);
-        headerlength += 2;
-        headerbegin[headerlength] = 0x00;
+        buffer_sprintf(w->response.header_output,
+                       "HTTP/1.1 %d %s\r\n"
+                       "Location: https://%s%s\r\n",
+                       w->response.code, code_msg,
+                       w->server_host,
+                       w->last_url);
     }else {
-        memcpy(headerbegin,"\r\n",2);
-        headerbegin[2]=0x00;
-    }
-
-    buffer_sprintf(w->response.header_output,
-            "HTTP/1.1 %d %s\r\n"
-                    "Connection: %s\r\n"
-                    "Server: NetData Embedded HTTP Server %s\r\n"
-                    "Access-Control-Allow-Origin: %s\r\n"
-                    "Access-Control-Allow-Credentials: true\r\n"
-                    "Content-Type: %s\r\n"
-                    "Date: %s%s"
-                   , w->response.code, code_msg
-                   , web_client_has_keepalive(w)?"keep-alive":"close"
-                   , VERSION
-                   , w->origin
-                   , content_type_string
-                   , date
-                   , headerbegin
-    );
+        buffer_sprintf(w->response.header_output,
+                       "HTTP/1.1 %d %s\r\n"
+                       "Connection: %s\r\n"
+                       "Server: NetData Embedded HTTP Server %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);
@@ -1233,12 +1242,11 @@ static inline void web_client_send_http_header(struct web_client *w) {
         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"
-        );
-    }
+    if(likely(w->response.zoutput))
+        buffer_strcat(w->response.header_output, "Content-Encoding: gzip\r\n");
+
+    if(likely(w->flags & WEB_CLIENT_CHUNKED_TRANSFER))
+        buffer_strcat(w->response.header_output, "Transfer-Encoding: chunked\r\n");
     else {
         if(likely((w->response.data->len || w->response.rlen))) {
             // we know the content length, put it
@@ -1252,6 +1260,10 @@ static inline void web_client_send_http_header(struct web_client *w) {
 
     // end of HTTP header
     buffer_strcat(w->response.header_output, "\r\n");
+}
+
+static inline void web_client_send_http_header(struct web_client *w) {
+    web_client_build_http_header(w);
 
     // sent the HTTP header
     debug(D_WEB_DATA, "%llu: Sending response HTTP header of size %zu: '%s'"
@@ -1339,8 +1351,23 @@ static inline int web_client_switch_host(RRDHOST *host, struct web_client *w, ch
     if(tok && *tok) {
         debug(D_WEB_CLIENT, "%llu: Searching for host with name '%s'.", w->id, tok);
 
+        if(!url) { //no delim found
+            debug(D_WEB_CLIENT, "%llu: URL doesn't end with / generating redirect.", w->id);
+            char *protocol, *url_host;
+#ifdef ENABLE_HTTPS
+            protocol = ((w->ssl.conn && !w->ssl.flags) || w->ssl.flags & NETDATA_SSL_PROXY_HTTPS) ? "https" : "http";
+#else
+            protocol = "http";
+#endif
+            url_host = (!w->forwarded_host[0])?w->server_host:w->forwarded_host;
+            buffer_sprintf(w->response.header, "Location: %s://%s%s/\r\n", protocol, url_host, w->last_url);
+            buffer_strcat(w->response.data, "Permanent redirect");
+            return HTTP_RESP_REDIR_PERM;
+        }
+
         // 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';
 
@@ -1349,7 +1376,32 @@ static inline int web_client_switch_host(RRDHOST *host, struct web_client *w, ch
         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);
+#ifdef ENABLE_DBENGINE
+        int release_host = 0;
+        if (!host) {
+            host = sql_create_host_by_uuid(tok);
+            if (likely(host)) {
+                rrdhost_flag_set(host, RRDHOST_FLAG_ARCHIVED);
+                release_host = 1;
+            }
+        }
+        if(host) {
+            int rc = web_client_process_url(host, w, url);
+            if (release_host) {
+                freez(host->hostname);
+                freez((char *) host->os);
+                freez((char *) host->tags);
+                freez((char *) host->timezone);
+                freez(host->program_name);
+                freez(host->program_version);
+                freez(host->registry_hostname);
+                freez(host);
+            }
+            return rc;
+        }
+#else
+        if (host) return web_client_process_url(host, w, url);
+#endif
     }
 
     buffer_flush(w->response.data);
@@ -1499,7 +1551,7 @@ void web_client_process_request(struct web_client *w) {
                         return;
                     }
 
-                    w->response.code = rrdpush_receiver_thread_spawn(localhost, w, w->decoded_url);
+                    w->response.code = rrdpush_receiver_thread_spawn(w, w->decoded_url);
                     return;
 
                 case WEB_CLIENT_MODE_OPTIONS:
@@ -1558,7 +1610,14 @@ void web_client_process_request(struct web_client *w) {
         {
             buffer_flush(w->response.data);
             w->response.data->contenttype = CT_TEXT_HTML;
-            buffer_strcat(w->response.data, "<!DOCTYPE html><!-- SPDX-License-Identifier: GPL-3.0-or-later --><html><body onload=\"window.location.href ='https://'+ window.location.hostname + ':' + window.location.port +  window.location.pathname\">Redirecting to safety connection, case your browser does not support redirection, please click <a onclick=\"window.location.href ='https://'+ window.location.hostname + ':' + window.location.port +  window.location.pathname\">here</a>.</body></html>");
+            buffer_strcat(w->response.data,
+                          "<!DOCTYPE html><!-- SPDX-License-Identifier: GPL-3.0-or-later --><html>"
+                          "<body onload=\"window.location.href ='https://'+ window.location.hostname +"
+                          " ':' + window.location.port + window.location.pathname + window.location.search\">"
+                          "Redirecting to safety connection, case your browser does not support redirection, please"
+                          " click <a onclick=\"window.location.href ='https://'+ window.location.hostname + ':' "
+                          " + window.location.port + window.location.pathname + window.location.search\">here</a>."
+                          "</body></html>");
             w->response.code = HTTP_RESP_MOVED_PERM;
             break;
         }
diff --git a/web/server/web_client.h b/web/server/web_client.h
index c785a7fda..48bf1ac86 100644
--- a/web/server/web_client.h
+++ b/web/server/web_client.h
@@ -6,24 +6,22 @@
 #include "libnetdata/libnetdata.h"
 
 #ifdef NETDATA_WITH_ZLIB
-extern int web_enable_gzip,
-        web_gzip_level,
-        web_gzip_strategy;
+extern int web_enable_gzip, web_gzip_level, web_gzip_strategy;
 #endif /* NETDATA_WITH_ZLIB */
 
 // HTTP_CODES 2XX Success
-#define HTTP_RESP_OK            200
+#define HTTP_RESP_OK 200
 
 // HTTP_CODES 3XX Redirections
-#define HTTP_RESP_MOVED_PERM    301
-#define HTTP_RESP_REDIR_TEMP    307
-#define HTTP_RESP_REDIR_PERM    308
+#define HTTP_RESP_MOVED_PERM 301
+#define HTTP_RESP_REDIR_TEMP 307
+#define HTTP_RESP_REDIR_PERM 308
 
 // HTTP_CODES 4XX Client Errors
-#define HTTP_RESP_BAD_REQUEST   400
-#define HTTP_RESP_FORBIDDEN     403
-#define HTTP_RESP_NOT_FOUND     404
-#define HTTP_RESP_PRECOND_FAIL  412
+#define HTTP_RESP_BAD_REQUEST 400
+#define HTTP_RESP_FORBIDDEN 403
+#define HTTP_RESP_NOT_FOUND 404
+#define HTTP_RESP_PRECOND_FAIL 412
 
 // HTTP_CODES 5XX Server Errors
 #define HTTP_RESP_INTERNAL_SERVER_ERROR 500
@@ -33,10 +31,10 @@ extern int respect_web_browser_do_not_track_policy;
 extern char *web_x_frame_options;
 
 typedef enum web_client_mode {
-    WEB_CLIENT_MODE_NORMAL      = 0,
-    WEB_CLIENT_MODE_FILECOPY    = 1,
-    WEB_CLIENT_MODE_OPTIONS     = 2,
-    WEB_CLIENT_MODE_STREAM      = 3
+    WEB_CLIENT_MODE_NORMAL = 0,
+    WEB_CLIENT_MODE_FILECOPY = 1,
+    WEB_CLIENT_MODE_OPTIONS = 2,
+    WEB_CLIENT_MODE_STREAM = 3
 } WEB_CLIENT_MODE;
 
 typedef enum {
@@ -52,20 +50,22 @@ typedef enum {
 } HTTP_VALIDATION;
 
 typedef enum web_client_flags {
-    WEB_CLIENT_FLAG_DEAD              = 1 << 1, // if set, this client is dead
+    WEB_CLIENT_FLAG_DEAD = 1 << 1, // if set, this client is dead
 
-    WEB_CLIENT_FLAG_KEEPALIVE         = 1 << 2, // if set, the web client will be re-used
+    WEB_CLIENT_FLAG_KEEPALIVE = 1 << 2, // if set, the web client will be re-used
 
-    WEB_CLIENT_FLAG_WAIT_RECEIVE      = 1 << 3, // if set, we are waiting more input data
-    WEB_CLIENT_FLAG_WAIT_SEND         = 1 << 4, // if set, we have data to send to the client
+    WEB_CLIENT_FLAG_WAIT_RECEIVE = 1 << 3, // if set, we are waiting more input data
+    WEB_CLIENT_FLAG_WAIT_SEND = 1 << 4,    // if set, we have data to send to the client
 
-    WEB_CLIENT_FLAG_DO_NOT_TRACK      = 1 << 5, // if set, we should not set cookies on this client
+    WEB_CLIENT_FLAG_DO_NOT_TRACK = 1 << 5,      // if set, we should not set cookies on this client
     WEB_CLIENT_FLAG_TRACKING_REQUIRED = 1 << 6, // if set, we need to send cookies
 
-    WEB_CLIENT_FLAG_TCP_CLIENT        = 1 << 7, // if set, the client is using a TCP socket
-    WEB_CLIENT_FLAG_UNIX_CLIENT       = 1 << 8, // if set, the client is using a UNIX socket
+    WEB_CLIENT_FLAG_TCP_CLIENT = 1 << 7,  // if set, the client is using a TCP socket
+    WEB_CLIENT_FLAG_UNIX_CLIENT = 1 << 8, // if set, the client is using a UNIX socket
 
-    WEB_CLIENT_FLAG_DONT_CLOSE_SOCKET = 1 << 9,  // don't close the socket when cleaning up (static-threaded web server)
+    WEB_CLIENT_FLAG_DONT_CLOSE_SOCKET = 1 << 9, // don't close the socket when cleaning up (static-threaded web server)
+
+    WEB_CLIENT_CHUNKED_TRANSFER = 1 << 10, // chunked transfer (used with zlib compression)
 } WEB_CLIENT_FLAGS;
 
 //#ifdef HAVE_C___ATOMIC
@@ -74,7 +74,7 @@ typedef enum web_client_flags {
 //#define web_client_flag_clear(w, flag) __atomic_and_fetch(&((w)->flags), ~flag, __ATOMIC_SEQ_CST)
 //#else
 #define web_client_flag_check(w, flag) ((w)->flags & (flag))
-#define web_client_flag_set(w, flag)   (w)->flags |= flag
+#define web_client_flag_set(w, flag) (w)->flags |= flag
 #define web_client_flag_clear(w, flag) (w)->flags &= ~flag
 //#endif
 
@@ -118,59 +118,59 @@ typedef enum web_client_flags {
 #define NETDATA_WEB_REQUEST_MAX_SIZE 16384
 
 struct response {
-    BUFFER *header;                 // our response header
-    BUFFER *header_output;          // internal use
-    BUFFER *data;                   // our response data buffer
+    BUFFER *header;        // our response header
+    BUFFER *header_output; // internal use
+    BUFFER *data;          // our response data buffer
 
-    int code;                       // the HTTP response code
+    int code; // the HTTP response code
 
-    size_t rlen;                    // if non-zero, the excepted size of ifd (input of firecopy)
-    size_t sent;                    // current data length sent to output
+    size_t rlen; // if non-zero, the excepted size of ifd (input of firecopy)
+    size_t sent; // current data length sent to output
 
-    int zoutput;                    // if set to 1, web_client_send() will send compressed data
+    int zoutput; // if set to 1, web_client_send() will send compressed data
 #ifdef NETDATA_WITH_ZLIB
-    z_stream zstream;               // zlib stream for sending compressed output to client
+    z_stream zstream;                                    // zlib stream for sending compressed output to client
     Bytef zbuffer[NETDATA_WEB_RESPONSE_ZLIB_CHUNK_SIZE]; // temporary buffer for storing compressed output
-    size_t zsent;                   // the compressed bytes we have sent to the client
-    size_t zhave;                   // the compressed bytes that we have received from zlib
-    unsigned int zinitialized:1;
+    size_t zsent;                                        // the compressed bytes we have sent to the client
+    size_t zhave;                                        // the compressed bytes that we have received from zlib
+    unsigned int zinitialized : 1;
 #endif /* NETDATA_WITH_ZLIB */
-
 };
 
 struct web_client {
     unsigned long long id;
 
-    WEB_CLIENT_FLAGS flags;         // status flags for the client
-    WEB_CLIENT_MODE mode;           // the operational mode of the client
-    WEB_CLIENT_ACL acl;             // the access list of the client
-    int port_acl;                   // the operations permitted on the port the client connected to
-    char *auth_bearer_token;        // the Bearer auth token (if sent)
+    WEB_CLIENT_FLAGS flags;  // status flags for the client
+    WEB_CLIENT_MODE mode;    // the operational mode of the client
+    WEB_CLIENT_ACL acl;      // the access list of the client
+    int port_acl;            // the operations permitted on the port the client connected to
+    char *auth_bearer_token; // the Bearer auth token (if sent)
     size_t header_parse_tries;
     size_t header_parse_last_size;
 
-    int tcp_cork;                   // 1 = we have a cork on the socket
+    int tcp_cork; // 1 = we have a cork on the socket
 
     int ifd;
     int ofd;
 
-    char client_ip[INET6_ADDRSTRLEN];   // Defined buffer sizes include null-terminators
+    char client_ip[INET6_ADDRSTRLEN]; // Defined buffer sizes include null-terminators
     char client_port[NI_MAXSERV];
     char server_host[NI_MAXHOST];
     char client_host[NI_MAXHOST];
+    char forwarded_host[NI_MAXHOST]; //Used with proxy
 
-    char decoded_url[NETDATA_WEB_REQUEST_URL_SIZE + 1];  // we decode the URL in this buffer
-    char decoded_query_string[NETDATA_WEB_REQUEST_URL_SIZE + 1];  // we decode the Query String in this buffer
-    char last_url[NETDATA_WEB_REQUEST_URL_SIZE+1];       // we keep a copy of the decoded URL here
+    char decoded_url[NETDATA_WEB_REQUEST_URL_SIZE + 1];          // we decode the URL in this buffer
+    char decoded_query_string[NETDATA_WEB_REQUEST_URL_SIZE + 1]; // we decode the Query String in this buffer
+    char last_url[NETDATA_WEB_REQUEST_URL_SIZE + 1];             // we keep a copy of the decoded URL here
     size_t url_path_length;
-    char separator; // This value can be either '?' or 'f'
+    char separator;        // This value can be either '?' or 'f'
     char *url_search_path; //A pointer to the search path sent by the client
 
     struct timeval tv_in, tv_ready;
 
-    char cookie1[NETDATA_WEB_REQUEST_COOKIE_SIZE+1];
-    char cookie2[NETDATA_WEB_REQUEST_COOKIE_SIZE+1];
-    char origin[NETDATA_WEB_REQUEST_ORIGIN_HEADER_SIZE+1];
+    char cookie1[NETDATA_WEB_REQUEST_COOKIE_SIZE + 1];
+    char cookie2[NETDATA_WEB_REQUEST_COOKIE_SIZE + 1];
+    char origin[NETDATA_WEB_REQUEST_ORIGIN_HEADER_SIZE + 1];
     char *user_agent;
 
     struct response response;
@@ -179,22 +179,21 @@ struct web_client {
     size_t stats_sent_bytes;
 
     // cache of web_client allocations
-    struct web_client *prev;        // maintain a linked list of web clients
-    struct web_client *next;        // for the web servers that need it
+    struct web_client *prev; // maintain a linked list of web clients
+    struct web_client *next; // for the web servers that need it
 
     // MULTI-THREADED WEB SERVER MEMBERS
-    netdata_thread_t thread;        // the thread servicing this client
-    volatile int running;           // 1 when the thread runs, 0 otherwise
+    netdata_thread_t thread; // the thread servicing this client
+    volatile int running;    // 1 when the thread runs, 0 otherwise
 
     // STATIC-THREADED WEB SERVER MEMBERS
-    size_t pollinfo_slot;           // POLLINFO slot of the web client
-    size_t pollinfo_filecopy_slot;  // POLLINFO slot of the file read
+    size_t pollinfo_slot;          // POLLINFO slot of the web client
+    size_t pollinfo_filecopy_slot; // POLLINFO slot of the file read
 #ifdef ENABLE_HTTPS
     struct netdata_ssl ssl;
 #endif
 };
 
-
 extern uid_t web_files_uid(void);
 extern uid_t web_files_gid(void);
 
@@ -211,6 +210,8 @@ extern void buffer_data_options2string(BUFFER *wb, uint32_t options);
 
 extern int mysendfile(struct web_client *w, char *filename);
 
+extern void web_client_build_http_header(struct web_client *w);
+
 #include "daemon/common.h"
 
 #endif
diff --git a/web/server/web_client_cache.c b/web/server/web_client_cache.c
index 763e7e96a..afd51d854 100644
--- a/web/server/web_client_cache.c
+++ b/web/server/web_client_cache.c
@@ -188,7 +188,7 @@ struct web_client *web_client_get_from_cache_or_allocate() {
 #ifdef ENABLE_HTTPS
         w->ssl.conn = ssl;
         w->ssl.flags = NETDATA_SSL_START;
-        debug(D_WEB_CLIENT_ACCESS,"Reusing SSL structure with (w->ssl = NULL, w->accepted = %d)",w->ssl.flags);
+        debug(D_WEB_CLIENT_ACCESS,"Reusing SSL structure with (w->ssl = NULL, w->accepted = %u)", w->ssl.flags);
 #endif
     }
     else {
@@ -196,7 +196,7 @@ struct web_client *web_client_get_from_cache_or_allocate() {
         w = web_client_alloc();
 #ifdef ENABLE_HTTPS
         w->ssl.flags = NETDATA_SSL_START;
-        debug(D_WEB_CLIENT_ACCESS,"Starting SSL structure with (w->ssl = NULL, w->accepted = %d)",w->ssl.flags);
+        debug(D_WEB_CLIENT_ACCESS,"Starting SSL structure with (w->ssl = NULL, w->accepted = %u)", w->ssl.flags);
 #endif
         web_clients_cache.allocated++;
     }
author	Daniel Baumann <daniel.baumann@progress-linux.org>	2021-02-07 11:49:00 +0000
committer	Daniel Baumann <daniel.baumann@progress-linux.org>	2021-02-07 12:42:05 +0000
commit	2e85f9325a797977eea9dfea0a925775ddd211d9 (patch)
tree	452c7f30d62fca5755f659b99e4e53c7b03afc21 /web/server
parent	Releasing debian version 1.19.0-4. (diff)
download	netdata-2e85f9325a797977eea9dfea0a925775ddd211d9.tar.xz netdata-2e85f9325a797977eea9dfea0a925775ddd211d9.zip