Am 02.03.2014 um 13:11 schrieb Mark Wendt <wendt.m...@gmail.com>: > On Sat, Mar 1, 2014 at 3:04 PM, Michael Haberler <mai...@mah.priv.at> wrote: > >> >> Am 01.03.2014 um 18:19 schrieb W. Martinjak <mats...@play-pla.net>: >> >>> It seems the thrill of joy has gone.... ;) >> >> not for me - in fact I think it as reassuring to see we to converge on the >> same concept: Web UI interaction will happen over Websockets, and with JSON >> objects mapped to internal representation at the boundary; it is the >> approach taken by Peter Jensen with rockhopper, and (minus websockets) >> also the approach Sergey has taken in emcweb. >> >> The current implementation uses a Websockets proxy server based on >> libwebsockets (http://libwebsockets.org/trac/libwebsockets). That is a >> relatively low level bridge, but it is very fast, has a stable API, and the >> package is well supported by author and community. It also builds easily. >> So it's a safe stopgap. >> >> I see several interesting alternatives to libwebsockets/C: >> >> One would be to use node.js instead. There are several advantages to that, >> in particular it makes it much easier to to server-side extensions (in >> JavaScript instead of C), and many required bindings (zeroMQ, protobuf, >> Websockets) are available stock for node.js . The reason why I am not using >> node.js yet at this point in time is: this target still moves too fast. >> >> Another one would be to do the proxy in Go: also, all bindings available >> stock, and very fast. It is another interpretive language, and a bit heavy >> to require up front. It has significant potential for near-RT operation >> relative to Python; it is still a garbage-collecting language and hence not >> hard-RT capable. >> >> The third stock option one would be twisted, and an-all Python proxy. >> >> I think it really boils down to quality and effort to build prerequisites. >> But certainly there is room for experimentation and alternatives. >> >> In fact I would be very interested to cooperate with a person >> knowledgeable in node.js for a prototype interface to what I already have. >> Any takers? >> >> >> - Michael >> > > > I take it this WebUI implementation would require a web server running on > the local linux machine with all the included overhead and security > concerns that web servers have? Or is there some small, really safe, > really secure subset of apache that doesn't require a lot of overheard, and > comes secure out of the box running only on the local machine, accessible > to only the local machine>
yes, this is the case - libwebsockets can also serve files via http. So there's an optional mini http server within the same process; no separate server needed just to serve a few static html,js, image files from a single directory. Actually it shares the port with Websockets, so just one URI for both. Basically just a bootrom for a client Javascript application. For something more fancy server-side one would choose something else, but that is not a problem I need to address. Both websockets an http channels do support SSL and certificates if needed. Note I'm not building a WebUI - I work on the support to build to make it easy to build one. You cant expect more Javascript from me than a simple jsvcp HAL UI example with a few buttons, sliders and leds ;) - Michael > I install, configure and run web servers on a daily basis here at work. > Apache is not for the casual user and it can swipe a lot of resources if > not set up correctly, and is not very secure out of the box. > > Mark > ------------------------------------------------------------------------------ > Flow-based real-time traffic analytics software. Cisco certified tool. > Monitor traffic, SLAs, QoS, Medianet, WAAS etc. with NetFlow Analyzer > Customize your own dashboards, set traffic alerts and generate reports. > Network behavioral analysis & security monitoring. All-in-one tool. > http://pubads.g.doubleclick.net/gampad/clk?id=126839071&iu=/4140/ostg.clktrk > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Flow-based real-time traffic analytics software. Cisco certified tool. Monitor traffic, SLAs, QoS, Medianet, WAAS etc. with NetFlow Analyzer Customize your own dashboards, set traffic alerts and generate reports. Network behavioral analysis & security monitoring. All-in-one tool. http://pubads.g.doubleclick.net/gampad/clk?id=126839071&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
