Explain a bit more what metadata is.

pull/3109/head
Jorge Canizales 10 years ago
parent 1f0d49bb6e
commit 71e4c9679f
  1. 3
      objective-c/auth_sample/README.md

@ -139,7 +139,8 @@ The `ProtoRPC` class has a `requestMetadata` property defined like this:
```
Setting it to a dictionary of metadata keys and values will have them sent on the wire when the call
is started.
is started. gRPC metadata are pieces of information about the call sent by the client to the server
(and vice versa). They take the form of key-value pairs and are essentially opaque to gRPC itself.
```objective-c
call.requestMetadata = [NSMutableDictionary dictionaryWithDictionary:

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