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Thread: Open-Source HTML5 Terminal Emulator To Support X11

  1. #31
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    Quote Originally Posted by sarmad View Post
    Very interesting. So a supported browser is treating asm.js as assembly and compiling it in a way similar to assembly code? I thought the 'asm' part of the name is more metaphorical than actually referring to assembly.
    Something like that yes. I don't know exactly how it's implemented but I think
    it's the step "above" that IE. everything is in binary but don't have the actual
    architecture instructions which means the browser have to do one compilation
    before it can run it.

    Google recently released a benchmark suite called Octane 2.0 which includes
    one Asm.JS test (the zlib one). On my computer the results on that test are:
    Firefox (which have Asm.JS support): 35788
    Chrome (Without Asm.JS support): 12147

    So pretty good optimisations are made. Overall however Chrome beats Firefox.

  2. #32
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    Quote Originally Posted by riskable View Post
    It is a combination of a Python daemon--which acts as a web server translating your keystrokes/terminal output--and JavaScript which runs in the browser. The server keeps track of your terminal state so that if you get disconnected everything will resume precisely where it left off.

    It works in IE10+, Chrome/Chromium, Firefox, Safari (if you don't use a self-signed certificate), and Opera. Probably others too. The only major requirement is that the browser support WebSockets and Web Workers (never seen a browser that supported one but not the other).
    I'm not sure I get that. So the terminal in my browser window sends my keystrokes (including my remote ssh password) over the 'plain' wire to the web server (python daemon) which processes this and then an ssh connection emanates from the web server to the ssh server that I want to connect to?

  3. #33
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    Quote Originally Posted by grigi View Post
    :-D

    This is awesome! We always have to use SSH jump hosts to get around the network at work. (It spans most of Africa, so is a very segmented and inconsistently implemented network) Gate One could make this jumping around a lot less tedious :-)

    I just very recently started playing with Tornado (a few days ago), and I have to say this is the single most awesome example of a Tornado app I have seen :-)
    Thanks! I do love Tornado. I use it every day and yet I feel like I'm barely scratching the surface of what it's capable of.

  4. #34
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    Quote Originally Posted by ArneBab View Post
    Wow - this is pretty cool!

    It might just have answered the question how I can easily collaborate with people on shared projects - at least if I manage to get emacsclient running there.

    And AGPL is the perfect license for this - @riskable: Really cool work!

    It looks like the Demoserver is a bit overloaded right now, though…
    Thanks. You're right about the demo server, wow. Someone or something was causing the nethack clients to go *crazy* gobbling up CPU. Even after killing them they just kept respawning (people really wanted to play I guess!). It's all taken care of now though if you want to play with the demo.

  5. #35
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    Quote Originally Posted by ArneBab View Post
    But installing it locally only took about 15 minutes - yay!

    One question which isn’t clear at once: How do I open a terminal? (likely the docs will tell me that in a minute, but this could be more seamless).
    You're probably running into a bug with Firefox that I *just* fixed. If you pull the latest code terminals should open up right away.

  6. #36
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    Quote Originally Posted by krach View Post
    I'm not sure I get that. So the terminal in my browser window sends my keystrokes (including my remote ssh password) over the 'plain' wire to the web server (python daemon) which processes this and then an ssh connection emanates from the web server to the ssh server that I want to connect to?
    It's not that complicated, really:

    onkeydown -> send key to server -> send key to terminal program (e.g. ssh client)
    terminal program outputs something -> server converts it to HTML and sends to client -> client draws the HTML

    The complicated bits are the "polish". As in, very few web-based terminal clients let you copy & paste, work with foreign language input mechanisms, display images in terminals, etc etc. All that stuff "just works" in Gate One.

  7. #37

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    Quote Originally Posted by MartinK View Post
    Yep - and not only Android!
    * Python work on the old Nokia Maemo mobile devices (N7XX, N8XX, N900, N9/50) and there are lots of apps using it there, many are in the Ovi store
    * the Nemo mobile open mobile distro also has Python
    * the upcoming Sailfish running on the soon to be released Jolla device has Python & graphical applications using it
    * the BlackBerry 10 mobile OS has Python 3.2 built-in and applications using it are in the Black Berry World appstore
    * the OpenPandora mobile gaming device has Python & Python apps
    * even the late Neo FreeRunner had/has Python


    On the other hand, "normal" Java - not counting the Android incompatible flavor - isn't really used anywhere on current mobile platforms. There are is just a community port for the N900 used by a few apps. Don't know of it being used anywhere else.
    Not to mention that, if you want a familiar GUI toolkit, PySide already has instructions for building it against the Android technology preview and efforts are being made to bring Qt itself to iOS in addition to the existing port for BlackBerry 10.

  8. #38
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    Quote Originally Posted by riskable View Post
    onkeydown -> send key to server -> send key to terminal program (e.g. ssh client)
    terminal program outputs something -> server converts it to HTML and sends to client -> client draws the HTML
    Thanks for clarifying! So indeed:
    1.) the ssh password is traveling unencrypted from my computer to the gate one server.
    2.) the gate one server needs to process my password.
    Maybe you should put a warning somewhere. I guess the only proper setup would be a trusted server (my own) to which I connect over a trusted network (my lan, certainly not the internet). This limits the applicability quite a bit

    It does look very impressive though! But I don't really see the use case for me yet.

  9. #39
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    Oh, also the demo server is not reachable via https, only http.

  10. #40
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    Quote Originally Posted by riskable View Post
    You're probably running into a bug with Firefox that I *just* fixed. If you pull the latest code terminals should open up right away.
    YAY, it works!

    Now I just need to manage to teach emacs not to open in terminal mode but in X11-mode ☺

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