Add option for external URL to be used in web page.

config/config2.xsd

@@ -72,6 +72,7 @@
                 <xs:element ref="model" minOccurs="0"/>
                 <xs:element ref="manufacturerURL" minOccurs="0"/>
                 <xs:element ref="virtualURL" minOccurs="0"/>
+                <xs:element ref="externalURL" minOccurs="0"/>
                 <xs:element ref="presentationURL" minOccurs="0"/>
                 <xs:element ref="upnp-string-limit" minOccurs="0"/>
                 <xs:element ref="alive" minOccurs="0"/>

doc/config-server.rst

@@ -106,8 +106,21 @@ to enable special features that otherwise are only active with the vendor implem
 * Optional
 * Default: unset
 
-This tag sets the virtual URL of Gerbera web UI, a custom setting may be necessary if you want to access the web page via a reverse proxy.
-The value defaults to `http://<ip>:port`.
+This tag sets the virtual URL of Gerbera content which is part of the browse response.
+The value defaults to `http://<ip>:<port>`.
+
+``externalURL``
+~~~~~~~~~~~~~~
+
+.. code-block:: xml
+
+    <externalURL>http://gerbera.io/</externalURL>
+
+* Optional
+* Default: unset
+
+This tag sets the external URL of Gerbera web UI, a custom setting may be necessary if you want to access the web page via a reverse proxy.
+The value defaults to virtualURL or `http://<ip>:<port>` if virtualURL is not set.
 
 ``modelName``
 ~~~~~~~~~~~~~

src/config/config.h

@@ -238,6 +238,7 @@ enum config_option_t {
     CFG_TRANSCODING_MIMETYPE_PROF_MAP_ALLOW_UNUSED,
     CFG_TRANSCODING_PROFILES_PROFILE_ALLOW_UNUSED,
     CFG_VIRTUAL_URL,
+    CFG_EXTERNAL_URL,
     CFG_IMPORT_SYSTEM_DIRECTORIES,
     CFG_IMPORT_VISIBLE_DIRECTORIES,
     CFG_UPNP_MULTI_VALUES_ENABLED,

src/config/config_definition.cc

@@ -372,6 +372,9 @@ const std::vector<std::shared_ptr<ConfigSetup>> ConfigDefinition::complexOptions
     std::make_shared<ConfigStringSetup>(CFG_VIRTUAL_URL,
         "/server/virtualURL", "config-server.html#virtualURL",
         ""),
+    std::make_shared<ConfigStringSetup>(CFG_EXTERNAL_URL,
+        "/server/externalURL", "config-server.html#externalURL",
+        ""),
     std::make_shared<ConfigStringSetup>(CFG_SERVER_MODEL_NAME,
         "/server/modelName", "config-server.html#modelname",
         DESC_MODEL_NAME),

src/server.cc

@@ -182,10 +182,11 @@
     std::string presentationURL = getPresentationUrl();
 
     log_debug("Creating UpnpXMLBuilder");
-    xmlBuilder = std::make_shared<UpnpXMLBuilder>(context, getVirtualUrl(), presentationURL);
+    upnpXmlBuilder = std::make_shared<UpnpXMLBuilder>(context, getVirtualUrl(), presentationURL);
+    webXmlBuilder = std::make_shared<UpnpXMLBuilder>(context, getExternalUrl(), presentationURL);
 
     // register root device with the library
-    auto desc = xmlBuilder->renderDeviceDescription();
+    auto desc = upnpXmlBuilder->renderDeviceDescription();
     std::ostringstream buf;
     desc->print(buf, "", 0);
     std::string deviceDescription = buf.str();
@@ -213,48 +214,60 @@
     }
 
     log_debug("Creating ContentDirectoryService");
-    cds = std::make_unique<ContentDirectoryService>(context, xmlBuilder, rootDeviceHandle,
+    cds = std::make_unique<ContentDirectoryService>(context, upnpXmlBuilder, rootDeviceHandle,
         config->getIntOption(CFG_SERVER_UPNP_TITLE_AND_DESC_STRING_LIMIT));
 
     log_debug("Creating ConnectionManagerService");
-    cmgr = std::make_unique<ConnectionManagerService>(context, xmlBuilder, rootDeviceHandle);
+    cmgr = std::make_unique<ConnectionManagerService>(context, upnpXmlBuilder, rootDeviceHandle);
 
     log_debug("Creating MRRegistrarService");
-    mrreg = std::make_unique<MRRegistrarService>(context, xmlBuilder, rootDeviceHandle);
+    mrreg = std::make_unique<MRRegistrarService>(context, upnpXmlBuilder, rootDeviceHandle);
 
     // The advertisement will be sent by LibUPnP every (A/2)-30 seconds, and will have a cache-control max-age of A where A is
     // the value configured here. Ex: A value of 62 will result in an SSDP advertisement being sent every second.
-    log_info("Will send UPnP Alive advertisements every {} seconds", (aliveAdvertisementInterval / 2) - 30);
+    log_debug("Will send UPnP Alive advertisements every {} seconds", (aliveAdvertisementInterval / 2) - 30);
     ret = UpnpSendAdvertisement(rootDeviceHandle, aliveAdvertisementInterval);
     if (ret != UPNP_E_SUCCESS) {
         throw UpnpException(ret, fmt::format("run: UpnpSendAdvertisement {} failed", aliveAdvertisementInterval));
     }
 
+    // UpnpSetAllowLiteralHostRedirection(1);
+
     UpnpSetHostValidateCallback(
         [](auto host, auto cookie) -> int {
             auto hostStr = std::string(host);
-            auto ip = std::string(UpnpGetServerIpAddress());
-            auto ip6 = std::string(UpnpGetServerIp6Address());
-            auto ip6gla = std::string(UpnpGetServerUlaGuaIp6Address());
-
-            if (hostStr.find(ip) != std::string::npos || hostStr.find(ip6) != std::string::npos || hostStr.find(ip6gla) != std::string::npos) {
-                return UPNP_E_SUCCESS;
+            for (auto&& name : static_cast<Server*>(cookie)->validHosts) {
+                if (hostStr.find(name) != std::string::npos) {
+                    return UPNP_E_SUCCESS;
+                } else if (name.find(hostStr) != std::string::npos) {
+                    return UPNP_E_SUCCESS;
+                }
             }
 
-            auto virtualURL = static_cast<Server*>(cookie)->getVirtualUrl();
-            if (!virtualURL.empty() && virtualURL.find(host) != std::string::npos) {
-                return UPNP_E_SUCCESS;
-            }
-            log_warning("Rejected attempt to load host '{}' as it does not match configured virtualURL: '{}'. "
+            log_warning("Rejected attempt to load host '{}' as it does not match configured virtualURL/externalURL: '{}'/'{}'. "
                         "See https://docs.gerbera.io/en/stable/config-server.html#virtualurl",
-                host, static_cast<Server*>(cookie)->config->getOption(CFG_VIRTUAL_URL));
+                host, static_cast<Server*>(cookie)->config->getOption(CFG_VIRTUAL_URL),
+                static_cast<Server*>(cookie)->config->getOption(CFG_EXTERNAL_URL));
             return UPNP_E_BAD_HTTPMSG;
         },
         this);
 
     std::string url = getVirtualUrl();
     writeBookmark(url);
     log_info("The Web UI can be reached by following this link: {}", url);
+
+    validHosts = std::vector<std::string> {
+        std::string(UpnpGetServerIpAddress()),
+        std::string(UpnpGetServerIp6Address()),
+        std::string(UpnpGetServerUlaGuaIp6Address()),
+    };
+    if (!url.empty()) {
+        validHosts.push_back(url);
+    }
+    url = getExternalUrl();
+    if (!url.empty()) {
+        validHosts.push_back(url);
+    }
 }
 
 int Server::startupInterface(const std::string& iface, in_port_t inPort)
@@ -296,15 +309,18 @@
 {
     std::string presentationURL = config->getOption(CFG_SERVER_PRESENTATION_URL);
     if (presentationURL.empty()) {
-        presentationURL = fmt::format("http://{}:{}/", ip, port);
+        presentationURL = fmt::format("http://{}/", GrbNet::renderWebUri(ip, port));
     } else {
         auto appendto = EnumOption<UrlAppendMode>::getEnumOption(config, CFG_SERVER_APPEND_PRESENTATION_URL_TO);
         if (appendto == UrlAppendMode::ip) {
-            presentationURL = fmt::format("http://{}:{}", ip, presentationURL);
+            presentationURL = fmt::format("{}/{}", GrbNet::renderWebUri(ip, 0), presentationURL);
         } else if (appendto == UrlAppendMode::port) {
-            presentationURL = fmt::format("http://{}:{}/{}", ip, port, presentationURL);
+            presentationURL = fmt::format("{}/{}", GrbNet::renderWebUri(ip, port), presentationURL);
         } // else appendto is none and we take the URL as it entered by user
     }
+    if (!startswith(presentationURL, "http")) { // url does not start with http
+        presentationURL = fmt::format("http://{}", presentationURL);
+    }
     return presentationURL;
 }
 
@@ -342,6 +358,23 @@
     return virtUrl;
 }
 
+std::string Server::getExternalUrl() const
+{
+    auto virtUrl = config->getOption(CFG_EXTERNAL_URL);
+    if (virtUrl.empty()) {
+        virtUrl = config->getOption(CFG_VIRTUAL_URL);
+        if (virtUrl.empty()) {
+            virtUrl = GrbNet::renderWebUri(ip, port);
+        }
+    }
+    if (!startswith(virtUrl, "http")) { // url does not start with http
+        virtUrl = fmt::format("http://{}", virtUrl);
+    }
+    if (virtUrl.back() == '/')
+        virtUrl.pop_back();
+    return virtUrl;
+}
+
 bool Server::getShutdownStatus() const
 {
     return server_shutdown_flag;
@@ -415,7 +448,7 @@
     case UPNP_CONTROL_ACTION_REQUEST:
         log_debug("UPNP_CONTROL_ACTION_REQUEST");
         try {
-            auto request = ActionRequest(xmlBuilder, clientManager, static_cast<UpnpActionRequest*>(const_cast<void*>(event)));
+            auto request = ActionRequest(upnpXmlBuilder, clientManager, static_cast<UpnpActionRequest*>(const_cast<void*>(event)));
             routeActionRequest(request);
             request.update();
         } catch (const UpnpException& upnpE) {
@@ -547,7 +580,7 @@
     log_debug("Filename: {}", filename);
 
     if (startswith(link, fmt::format("/{}/{}", SERVER_VIRTUAL_DIR, CONTENT_MEDIA_HANDLER))) {
-        return std::make_unique<FileRequestHandler>(content, xmlBuilder);
+        return std::make_unique<FileRequestHandler>(content, upnpXmlBuilder);
     }
 
     if (startswith(link, fmt::format("/{}/{}", SERVER_VIRTUAL_DIR, CONTENT_UI_HANDLER))) {
@@ -558,11 +591,11 @@
         auto it = params.find(URL_REQUEST_TYPE);
         std::string rType = it != params.end() && !it->second.empty() ? it->second : "index";
 
-        return Web::createWebRequestHandler(context, content, xmlBuilder, rType);
+        return Web::createWebRequestHandler(context, content, webXmlBuilder, rType);
     }
 
     if (startswith(link, fmt::format("/{}/{}", SERVER_VIRTUAL_DIR, DEVICE_DESCRIPTION_PATH))) {
-        return std::make_unique<DeviceDescriptionHandler>(content, xmlBuilder);
+        return std::make_unique<DeviceDescriptionHandler>(content, upnpXmlBuilder);
     }
 
 #if defined(HAVE_CURL)

src/server.h

@@ -98,6 +98,7 @@ class Server : public std::enable_shared_from_this<Server> {
 
     std::string ip;
     in_port_t port {};
+    std::vector<std::string> validHosts {};
 
     /// \brief This flag is set to true by the upnp_cleanup() function.
     bool server_shutdown_flag {};
@@ -127,7 +128,8 @@ class Server : public std::enable_shared_from_this<Server> {
     /// The value is read from the configuration.
     int aliveAdvertisementInterval {};
 
-    std::shared_ptr<UpnpXMLBuilder> xmlBuilder;
+    std::shared_ptr<UpnpXMLBuilder> upnpXmlBuilder;
+    std::shared_ptr<UpnpXMLBuilder> webXmlBuilder;
 
     /// \brief ContentDirectoryService instance.
     ///
@@ -211,7 +213,6 @@ class Server : public std::enable_shared_from_this<Server> {
     void writeBookmark(const std::string& addr);
     void emptyBookmark();
 
-    std::string getPresentationUrl() const;
     int startupInterface(const std::string& iface, in_port_t inPort);
 
     /// \brief Returns the content url of the server.
@@ -221,6 +222,8 @@ class Server : public std::enable_shared_from_this<Server> {
     /// that we actually get that port after startup. This function
     /// contains the port on which the server is actually running.
     std::string getVirtualUrl() const;
+    std::string getExternalUrl() const;
+    std::string getPresentationUrl() const;
 };
 
 #endif // __SERVER_H__

src/util/grb_net.cc

@@ -229,7 +229,13 @@ std::string GrbNet::ipToInterface(std::string_view ip)
 
 std::string GrbNet::renderWebUri(std::string_view ip, in_port_t port)
 {
-    if (ip.find(':') != std::string_view::npos)
+    if (port == 0) {
+        if (ip.find(':') != std::string_view::npos) {
+            return fmt::format("[{}]", ip);
+        }
+        return fmt::format("{}", ip);
+    } else if (ip.find(':') != std::string_view::npos) {
         return fmt::format("[{}]:{}", ip, port);
+    }
     return fmt::format("{}:{}", ip, port);
 }