how to using socket api in hosted app of NaCl

[정한구]

Hi. 

I create NaCl application using nacl_io sample.

I checked that nacl_io socket is work in packaged app. but, it didn't work in hosted app.

This app was registered in the CWS.

how to work this app?

my hosted app link is as below

http://61.34.112.49/ppStreamBridge/

I checked as below

1.  run chrome using flag (--allow-nacl-socket-api=61.34.112.49) is work.

2. permissions of sockets was inserted in manifest.json  

my manifest.json is as below

{

    "name": "ppStreamBridge",

    "version": "0.9.8",

    "manifest_version": 2,

    "description": "ppStreamBridge",

    "offline_enabled": false,

    "icons": {

        "128": "icon128.png"

    },

    "app": {

        "background": {

            "scripts": [

                "background.js"

            ]

        },

        "update_url": "http://61.34.112.49/ppStreamBridge/auto-update.xml"

    },

    "urls": "http://61.34.112.49/ppStreamBridge/",

    "launch": {

        "web_url": "http://61.34.112.49/ppStreamBridge/"

    },

    "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAjtdlyjf7XJplSl/hUtiOtojpQ/sJDKI4fFM+AiOSIF7S2Eba/2YBM9oPCsw9vCckV1yJ6EEWJF8KvJEMXj7djHLI4JzvwUW2ejKXRBr5IcgH2F+aY8loqg21R22j0ZtGPsIiWq0GaM+vepmi4m6m3OiaIwUEQHqRyOt6orsSsweePtiLOivh6ziZoTEf1gnHmKeHeuYTi+mYRwvJ7tc0M//JsDEbGP1qVi+uIEQjVH6envd8F5nx5O4iWpIFUeKscgHelk4F3b4A+nfc5nPe7RraJcFdzKoM1nxKdMUmjVN8pn0+IdM76axVepNZAOM5pfgoGHSXdkgEG1s8M/pzIwIDAQAB",

    "permissions": [

        "unlimitedStorage",

        {

            "socket": [

                "tcp-listen:*:*",

                "tcp-connect",

                "resolve-host",

                "udp-bind:*:*",

                "udp-send-to:*:*"

            ]

        }

    ]

}

Thanks for the help.

[Victor Khimenko]

You are not the first one to hit this problem, apparently. STFW:

  http://goobbe.com/questions/4059695/why-chrome-sockets-tcp-create-does-not-work-in-app-background-script

"socket" is permission for old-style deprecated API, permissions for new-style API is called "sockets":

  https://developer.chrome.com/apps/manifest/sockets

 

[정한구]

Hi khim

Thank you for your help.

I edit my manifest.json and reregist to CWS

But, it doesn't work

Result is gethostbyname failed, error is "Unknown error in gethostbyname: 0.".

My manifest.json is as below

"permissions": [

        "unlimitedStorage",

        {

            "sockets": [

                {

                    "udp": [

                        {

                            "bind": "*",

                            "send": "*"

                        }

                    ],

                    "tcp": {

                        "connect": "*"

                    }

                }

            ]

        }

    ]

 

Thanks for your help

[정한구]

One more infomation.

I apply edited manifest.json and check packaged app

but it's doesn't work too :(

how can i fix it?

[Ian Clelland]

For the chrome.sockets API, the "sockets" key in the manifest file shouldn't be nested under "permissions", it is a top-level item.

See https://developer.chrome.com/apps/manifest for the full format, but essentially, instead of:

"permissions": [

        "unlimitedStorage",

        {

            "sockets": [

                {

                    "udp": [

                        {

                            "bind": "*",

                            "send": "*"

                        }

                    ],

                    "tcp": {

                        "connect": "*"

                    }

                }

            ]

        }

    ]

you should have something like

"permissions": ["unlimitedStorage"],

"sockets": {

    "udp": {

        "bind": "*",

        "send": "*"

    },

    "tcp": {

        "connect": "*"

    }

}

(It's been a while since I've used it, so I don't know if that syntax is *exactly* correct -- read the docs carefully and it should explain it all.)

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[Vitaly Ivanov]

It's an old question, but... I have a problem with socket binding (PNaCl app working via nacl_io) - it works if I serve it locally or on AWS and open the page with Chrome/Chromium configured properly (--allow-nacl-socket-api command line arg), it works as a packaged app (as long as the manifest is "old style"), but if I publish it as a hosted app via Google CWS (which for some reason takes 6-8 hours instead of promised "up to 60 min"), socket bind() just returns 13 (access/permission denied). I tried "old style", "new style", "old style" + "new style" in one manifest.json - nothing helps.

I wonder if it's possible at all to distribute this kind of app as hosted? When I install it, I'm not even asked if I'm alright with giving this app permission to do all sorts of network stuff (I get this warning when installing it as a packaged app), so it looks like for hosted apps the permission section is just silently ignored. 

 

[Vitaly Ivanov]

I've stumbled upon a detail I missed previously: https://developer.chrome.com/webstore/choosing. There's a box "Do you want to use chrome.* APIs?", if yes you're left with the only option - a packaged app. I guess this answers my question about sockets in hosted apps 

[Rassulzhan]

Hi, I am also developing PNaCl plugin, but have the same problem with socket API.

Did you solve that problem? 

I will wait for your reply and any advice to solve this problem, because I am trying to handle this problem for the two weeks already.

Thanks

Best regards,

Rassulzhan

[Imran]

How does the NaCl port of OpenSSH get around this?

The secure shell extension is not an app, and doesn't request any special permissions - but it's able to access raw sockets.

How does that work?

thanks,

imran

[PhistucK]

It uses private APIs, that are not available to normal applications. :(

☆PhistucK

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