cd /Users/apple/workspace/go/src/github.com/johanbrandhorst/grpcweb-example && go run main.go
INFO[2018-02-15T08:35:36.242571+01:00] Serving on https://localhost:10000
2018/02/15 08:35:40 http: TLS handshake error from 127.0.0.1:50771: tls: first record does not look like a TLS handshake

Apparently this can lead to much smaller files! Use gzip or zopfli, whatever seems nicest.

Hey,

i have a Makefile to run the code in this repo, but it fails on the regen.
The proto runs, but the "go generate ./client/..." fails ....

cd /Users/apple/workspace/go/src/github.com/johanbrandhorst/grpcweb-example && protoc proto/library/book_service.proto --gopherjs_out=plugins=grpc,Mgoogle/protobuf/timestamp.proto=github.com/johanbrandhorst/protobuf/ptypes/timestamp:./client/ --go_out=plugins=grpc:./server/
google/protobuf
cd /Users/apple/workspace/go/src/github.com/johanbrandhorst/grpcweb-example && go generate ./client/...
proto/library/book_service.pb.gopherjs.go:474:11: GrpcWebPackageIsVersion2 not declared by package grpcweb
proto/library/book_service.pb.gopherjs.go:528:9: ServerStream not declared by package grpcweb
proto/library/book_service.pb.gopherjs.go:512:14: invalid operation: c.client (variable of type *github.com/johanbrandhorst/grpcweb-example/vendor/github.com/johanbrandhorst/protobuf/grpcweb.Client) has no field or method NewServerStream
proto/library/book_service.pb.gopherjs.go:532:15: invalid operation: x.stream (variable with invalid type) has no field or method RecvMsg
proto/library/book_service.pb.gopherjs.go:541:9: invalid operation: x.stream (variable with invalid type) has no field or methodContext

Suggested fix:

i think that the vendored "./vendor/myitcv.io/immutable/cmd/immutableGen" has a dependence on the "myitcv.io/gogenerate" and its changed recently and so you need to revendor it.

i hit this a few days ago and he fixed it on his side:
myitcv/immutable#52

BTW what are you using for vendoring ? Just so i can try to fix this as i move forward also and help..

Would like to be able to add a book, but if left completely unchecked it could theoretically cause the server to crash by exhausting all the memory.

I think this same architectural pattern is a really nice way to build mobile and desktop apps.

I have this working on desktop using the OS's native webview. So it works on all app stores. It's using a golang wrapper for c++.
Will push on a branch if you want.

For mobile I think you can use react native because it also has a webview inside it.
The thing that's a bit harder is compiling a golang background service in the phone. It's likely not a requirement for everyone but pretty nice because you can store you data there and your users have offline / cached access etc.

Am raising this aspect to see if there is interest.

after calling go get ... to fix #19 I'm having this issue:
go run main.go

command-line-arguments

./main.go:47:35: cannot use gs (type *"google.golang.org/grpc".Server) as type *"github.com/johanbrandhorst/grpcweb-example/vendor/google.golang.org/grpc".Server in argument to library.RegisterBookServiceServer

go version
go version go1.10.2 darwin/amd64

[grpcweb-example-e8d1556b-1]2018-02-04T10:32:22.149534773Z �[33mWARN�[0m[2018-02-04T10:32:22.149392233Z] Failed to create transport: connection error: desc = "transport: authentication handshake failed: tls: either ServerName or InsecureSkipVerify must be specified in the tls.Config" 
[grpcweb-example-e8d1556b-1]2018-02-04T10:32:22.150669434Z �[37mDEBU�[0m[2018-02-04T10:32:22.150324609Z] Closed connection                            
[grpcweb-example-e8d1556b-1]2018-02-04T10:32:22.150696443Z 2018/02/04 10:32:22 http: TLS handshake error from 172.17.0.1:35418: EOF 

This seems to be happening only for websocket requests. Could be a problem with the proxy itself.

go run main.go
main.go:14:2: cannot find package "github.com/gorilla/websocket" in any of:
/Users/timothee/homebrew/Cellar/go/1.10.2/libexec/src/github.com/gorilla/websocket (from $GOROOT)
/Users/timothee/go/src/github.com/gorilla/websocket (from $GOPATH)

I had to do:

go get github.com/gorilla/websocket
go get github.com/improbable-eng/grpc-web/go/grpcweb
go get github.com/johanbrandhorst/grpcweb-example/client/compiled
go get github.com/lpar/gzipped
go get github.com/sirupsen/logrus

could these instructions be added to readme? are these the correct instructions?

Since this example runs in the real world, it could benefit from the CDN caching provided by https://github.com/dave/jsgo.

Hi,

I'm running Go 1.11.1. However, vendored gopherjs doesn't like it:

~/projects/grpcweb/src/github.com/johanbrandhorst/grpcweb-example$ make install
go version
go version go1.11.1 linux/amd64
go install ./vendor/github.com/golang/protobuf/protoc-gen-go \
        ./vendor/github.com/johanbrandhorst/protobuf/protoc-gen-gopherjs \
        ./vendor/myitcv.io/react/cmd/reactGen \
        ./vendor/myitcv.io/immutable/cmd/immutableGen \
        ./vendor/github.com/foobaz/go-zopfli \
        ./vendor/github.com/gopherjs/gopherjs
# github.com/johanbrandhorst/grpcweb-example/vendor/github.com/gopherjs/gopherjs/compiler
vendor/github.com/gopherjs/gopherjs/compiler/compiler.go:20:9: undefined: ___GOPHERJS_REQUIRES_GO_VERSION_1_10___
Makefile:9: recipe for target 'install' failed
make: *** [install] Error 2

(Yep -- to be sure that the correct Go is referenced, I modified the makefile to invoke go version, but that should be the extent of it.)

Already started work on this but I've got a couple more ideas I'd like to implement.

Add some CircleCI tests to ensure builds and generation works.

It's not that interesting at the moment, and we could talk about binary encoded messages, Fetch API, gRPC and stuff. Much to cover!

I am running your example code to learn more..
Had this working a few days ago, but today the make regen is failing.

I assume its looking inside the vendor folder ?
any ideas ?

x-MacBook-Pro:grpcweb-example apple$ make
protoc -I. -I$GOPATH/src proto/library/book_service.proto \
    	--gopherjs_out=plugins=grpc,Mgoogle/protobuf/timestamp.proto=github.com/johanbrandhorst/protobuf/ptypes/timestamp:$GOPATH/src \
    	--go_out=plugins=grpc:$GOPATH/src
github.com/johanbrandhorst/protobuf/proto/gopherjs.proto: File not found.
proto/library/book_service.proto: Import "github.com/johanbrandhorst/protobuf/proto/gopherjs.proto" was not found or had errors.
make[1]: *** [regenerate] Error 1