Compiling with Emscripten to Web Assembly

[andro...@gmail.com]

Hi,
I'm trying to compile grpc with Emscripten to WebAssembly - trying to get a C++-based grpc client working in the browser.

Does anyone know if getting this working is even feasible and has anyone else tried it? I'm having issues compiling (mostly Protobuf) which I think I'll be able to solve, but I'd like to know if the effort is worth it.

[mav...@advancedpwr.com]

I just started looking at this today.  Any progress on your end?

[Matthew Avery]

I did get grpc and protobuf  compiles to WASM but it is not working yet, even after enabling SharedArrayBuffer on my browser.  I'm getting a type exception on the first call to Atomics.store() that is trying to allocate memory for pthread support.

[Wenbo Zhu]

I worked on grpc/grpc-web, and I don't believe you are able to do any native networking I/O from the browser, but if you have any pointer to suggest otherwise, happy to have a look and assess the feasibility.

[Matthew Avery]

I was able to compile grpc to asm.js using emscripten and run without errors, but I think you are correct, the client was not able to make a connection from the browser to the grpc server.  I'm not sure what the path forward is yet.  I am going to experiment with a c++ socket and see if webassembly will use websockets.  I saw a post on stackoverflow that suggested this is the case

[Wenbo Zhu]

On Wed, Mar 14, 2018 at 12:56 PM, Matthew Avery <mav...@advancedpwr.com> wrote:

I was able to compile grpc to asm.js using emscripten and run without errors, but I think you are correct, the client was not able to make a connection from the browser to the grpc server.  I'm not sure what the path forward is yet.  I am going to experiment with a c++ socket and see if webassembly will use websockets.  I saw a post on stackoverflow that suggested this is the case

I would guess websocket calls are bridged over JS calls ..(for all the security reasons)

 

On Wednesday, March 14, 2018 at 3:45:47 PM UTC-4, Wenbo Zhu wrote:

I worked on grpc/grpc-web, and I don't believe you are able to do any native networking I/O from the browser, but if you have any pointer to suggest otherwise, happy to have a look and assess the feasibility.

On Tuesday, March 13, 2018 at 6:25:53 AM UTC-7, Matthew Avery wrote:

I did get grpc and protobuf  compiles to WASM but it is not working yet, even after enabling SharedArrayBuffer on my browser.  I'm getting a type exception on the first call to Atomics.store() that is trying to allocate memory for pthread support.

On Friday, March 9, 2018 at 11:16:28 AM UTC-5, Matthew Avery wrote:

I just started looking at this today.  Any progress on your end?

On Friday, January 19, 2018 at 6:03:04 AM UTC-5, andro...@gmail.com wrote:

Hi,
I'm trying to compile grpc with Emscripten to WebAssembly - trying to get a C++-based grpc client working in the browser.

Does anyone know if getting this working is even feasible and has anyone else tried it? I'm having issues compiling (mostly Protobuf) which I think I'll be able to solve, but I'd like to know if the effort is worth it.

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[russell...@bynd.com]

Hi, 

I was wondering if anyone managed to get anywhere with this?

I'm looking into utilising gRPC from within a Webassembly C++ module.

Cheers

Russell

On Wednesday, March 14, 2018 at 8:43:12 PM UTC, Wenbo Zhu wrote:

On Wed, Mar 14, 2018 at 12:56 PM, Matthew Avery <mav...@advancedpwr.com> wrote:

I was able to compile grpc to asm.js using emscripten and run without errors, but I think you are correct, the client was not able to make a connection from the browser to the grpc server.  I'm not sure what the path forward is yet.  I am going to experiment with a c++ socket and see if webassembly will use websockets.  I saw a post on stackoverflow that suggested this is the case

I would guess websocket calls are bridged over JS calls ..(for all the security reasons)

 

On Wednesday, March 14, 2018 at 3:45:47 PM UTC-4, Wenbo Zhu wrote:

I worked on grpc/grpc-web, and I don't believe you are able to do any native networking I/O from the browser, but if you have any pointer to suggest otherwise, happy to have a look and assess the feasibility.

On Tuesday, March 13, 2018 at 6:25:53 AM UTC-7, Matthew Avery wrote:

I did get grpc and protobuf  compiles to WASM but it is not working yet, even after enabling SharedArrayBuffer on my browser.  I'm getting a type exception on the first call to Atomics.store() that is trying to allocate memory for pthread support.

On Friday, March 9, 2018 at 11:16:28 AM UTC-5, Matthew Avery wrote:

I just started looking at this today.  Any progress on your end?

On Friday, January 19, 2018 at 6:03:04 AM UTC-5, andro...@gmail.com wrote:

Hi,
I'm trying to compile grpc with Emscripten to WebAssembly - trying to get a C++-based grpc client working in the browser.

Does anyone know if getting this working is even feasible and has anyone else tried it? I'm having issues compiling (mostly Protobuf) which I think I'll be able to solve, but I'd like to know if the effort is worth it.

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[Matthew Avery]

I did not get the chance to finish the investigation.  I did however configure a grpc server to change its serialization to json at one point and had some js on web page (not a webassembly module) talking to it.

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