Updates:
Status: WorkingAsIntended
Comment #1 on issue 229 by ken...@google.com: TextFormat should have option
to silently ignore unknown fields
http://code.google.com/p/protobuf/issues/detail?id=229
This has come up before. Copied from a previous answer:
Text format is designed for communicating with people whereas binary format
is for communicating with machines. People make mistakes, like spelling
errors. These mistakes should be caught, not silently ignored. Therefore,
text format is NOT designed with the same forward- and
backward-compatibility properties as the binary format, and should not be
used when such compatibility is desired.
If you find yourself wanting to ignore unknown fields when parsing a
text-format message, most likely you should be using binary format instead.
One common use case of this is config files that are distributed to
production machines where some of those machines may be older and not know
about newly-added fields. In this case, what you should do is distribute
these configs as binary messages. You can still edit them in text format,
but then you should invoke protoc with --encode to produce a binary file
for distribution. Since you give protoc the newest version of the .proto
file, it will not need to ignore any fields. Remember that you can always
use protoc --decode to convert back to text.
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