Servo on Android can't load remote URLs

[ebalint]

I was testing it on PandaBoard 4430 with Android 4.1.2

Adb logcat:

https://gist.github.com/ebalint/0c9827e6559807ca97fe

[aydinkim]

I've made a simple socket example which uses rust(arm)'s basic socket and failed on my device as well :(
Though I had pushed a android internet permission into the manifest in the past.

Afaik, Rust socket of arm has never been tested yet. (I'm not sure!)
It looks a critical problem of servo-android.

I just think we should make sure that rust socket of arm works well at first.

[ebalint]

Can you upload your code? I think this error occurs only on ARM Android, because on ARM Linux (Ubuntu) it doesn't fail at this point.

[aydinkim]

@ebalint I used rust-http example in https://github.com/mozilla-servo/rust-http/blob/servo/src/examples/client/main.rs
I'm just curious that how did you build the arm-linux-ubuntu binary? used android ndk cross toolchain?
(According to https://github.com/mozilla/rust/wiki/Note-build-system, there is no arm-linux-gnueabi build target)

If it works well on the arm-linux,
I guess the problem is from either a android specific permission or libuv-android internal.
(differences between bionic and libc? I have no idea at this moment)
rust-lang/rust#6567

I'm not sure but maybe there has been no one who had fully checked operability of uv socket of android.

We can find out it sooner :)

[ebalint]

The build system needed a little bit of hacking, and I created a few patches as well. If you are interested I can send you them via email.

How can I compile this rust-http example? Because compilation fails for me because of the dependencies.

[aydinkim]

For simply, You should install the bunch of Rust files into your own system using 'sudo make install'. You can copy the example file to certain directory you want. And rust-http library should be located in the same directory. Simply you can obtain rust-http shared library after Servo-Arm build. And run 'rustc -L. -lrust-http main.rs'. You might get a executable file. (I'm not sure that that command must contain '-lrust-http'. I cannot remember, sorry)

If you want to run that executable binary on your android system, you need to copy all the rust native files such as librustuv-xx, libnative-xx, libstd-xx and so forth must be located at /system/lib of Android and executable binary need to be in the /system/bin.
Maybe you can launch the example on the device.
If it is failed with some dependency problem, you can change the environmental variables like 'LD_LIBRARY_PATH=(LOCATION OF YOUR RUST LIBRARIES IN YOUR DEVICE):$LD_LIBRARY_PATH'

If you have some problem so far, let me know with more details and I can help you more!

[aydinkim]

@ebalint Works well?

[ebalint]

@aydinkim Yes, thank you for the instructions. I successfully compiled it and it works well, the http response appeared on the console as a result.

[aydinkim]

@ebalint I'm pleased since you've made a good work. The example works well? I'd wonder if you let me know what exactly is the solution. In my case, it doesn't works well. you'd added kind of android permission?

[ebalint]

@aydinkim The example works only on ARM Ubuntu. On Android I didn't try it because i don't know how to put the example into an NDK project.

[ebalint]

I think this issue can be closed. I tested it on revision:7a5f1 and it works.