I'm trying to parse a protobuf-packet in the browser and while trying to
get this working encountered several questions:
1. Is it possible to use protobuf without node and the closure library?
2. When I use the closure-builder to build a javascript-file that I can run
in the browser I encounter the error "depstree.NamespaceNotFoundError:
Namespace "jspb.BinaryReader" never provided."
When I grep for this thing, I see two things
a. The npm-installed "google-protobuf"-module contains multiple usages
but no file that contains "goog.provide('jspb.BinaryReader')"
b. The manually downloaded protobuf-repository contains the file
"js/binary/reader.js" that apparently contains the definition.
2. The fact that the protobuf-repository version contains the
"jsbp.BinaryReader" made me play around with this option.
After playing around for a while, I figured out, that it is necessary to
run "npm install" before "gulp dist" as pointed out in the documentation
(https://developers.google.com/protocol-buffers/docs/reference/javascript-generated).
This generates the "google-protobuf.js" file.
Is this the correct way? Does this answer my first question with "no" - as
this step requires node?
3. I now tried to run the "closure-builder" again (I use the closure
library version that was installed in the previous step):
./protobuf/js/node_modules/google-closure-library/closure/bin/build/closurebuilder.py
\
--root="protobuf/js" \
--root="testJS/" \
--namespace="proto.test"
The folder "testJS" contains the javascript-files produced by protoc.
This produces the error:
depstree.MultipleProvideError: Namespace "protobuf.runtime.KernelTest"
provided more than once in sources:
PathSource protobuf/js/experimental/runtime/kernel/kernel_repeated_test.js
PathSource protobuf/js/experimental/runtime/kernel/kernel_test.js
My next idea was to include only the subfolders of "protobuf/js" that I
need - however, this doesn't work, as I need to include
"protobuf/js/message.js" because this file contains
"goog.provide('jspb.Message')" - the definition of "jsbp.Message".
How can I handle this? Do I need to include all files individually with the
"-i" option? I have noticed, that there is an exclude option on the current
master of protobuf (which seems to break the "closure-builder" on the
current master branch - but apparently there is already a fix underway) -
do I need to use this option?
4. Final question - does all this stuff make sense? Is anybody using a
similar approach or is there a different, simpler way to get protobuf
working in a browser?
Thanks
ou
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