[GitHub] [arrow] amoeba commented on issue #26497: Add ability to send arbitrary HTTP headers to C++/Python clients

["amoeba (via GitHub)" <gi...@apache.org>]

amoeba commented on issue #26497:
URL: https://github.com/apache/arrow/issues/26497#issuecomment-1442563546

   Hey @lidavidm, I'm trying to do this and am running into an issue and I'm not sure we support this at the moment as it's currently documented:
   
   With C++ code,
   
   ```c++
   arrow::flight::FlightCallOptions options;
   options.headers.push_back(std::make_pair("X-MY-HEADER", "SOMEVAL"));
   ARROW_ASSIGN_OR_RAISE(listing, client->ListFlights(options, {}));
   ```
   
   or Python
   
   ```python
   client = flight.connect("grpc://localhost:61234")
   options = flight.FlightCallOptions(headers=[(b"X-MY-HEADER", b"SOMEVAL")])
   [info for info in client.list_flights(b"", options)]
   ```
   
   I get
   
   ```
   E0223 14:09:41.184318000 8048804160 call.cc:899]                       validate_metadata: UNKNOWN:Illegal header key {created_time:"2023-02-23T14:09:41.183782-09:00", offset:0, raw_bytes:"58 2d 4d 59 2d 48 45 41 44 45 52 \'X-MY-HEADER\'\x00"}
   E0223 14:09:41.184341000 8048804160 call_op_set.h:978]                 API misuse of type GRPC_CALL_ERROR_INVALID_METADATA observed
   E0223 14:09:41.184345000 8048804160 call_op_set.h:980]                 assertion failed: false
   fish: Job 1, 'GRPC_VERBOSITY=info GRPC_TRACE=…' terminated by signal SIGABRT (Abort)
   ```
   
   <details>
   <summary>Full backtrace</summary>
   
   ```
   * thread #1, queue = 'com.apple.main-thread', stop reason = signal SIGABRT
     * frame #0: 0x000000018462e868 libsystem_kernel.dylib`__pthread_kill + 8
       frame #1: 0x0000000184665cec libsystem_pthread.dylib`pthread_kill + 288
       frame #2: 0x000000018459e2c8 libsystem_c.dylib`abort + 180
       frame #3: 0x0000000103ab1a68 libgrpc++.1.51.dylib`grpc::CoreCodegen::assert_fail(char const*, char const*, int) + 48
       frame #4: 0x000000010025901c libarrow_flight.900.dylib`grpc::internal::CallOpSet<grpc::internal::CallOpSendInitialMetadata, grpc::internal::CallOpSendMessage, grpc::internal::CallOpClientSendClose, grpc::internal::CallNoOp<4>, grpc::internal::CallNoOp<5>, grpc::internal::CallNoOp<6> >::ContinueFillOpsAfterInterception() + 300
       frame #5: 0x000000010023fc4c libarrow_flight.900.dylib`arrow::flight::transport::grpc::(anonymous namespace)::GrpcClientInterceptorAdapter::Intercept(grpc::experimental::InterceptorBatchMethods*) + 360
       frame #6: 0x00000001002437d4 libarrow_flight.900.dylib`grpc::internal::InterceptorBatchMethodsImpl::RunInterceptors() + 336
       frame #7: 0x0000000100258eac libarrow_flight.900.dylib`grpc::internal::CallOpSet<grpc::internal::CallOpSendInitialMetadata, grpc::internal::CallOpSendMessage, grpc::internal::CallOpClientSendClose, grpc::internal::CallNoOp<4>, grpc::internal::CallNoOp<5>, grpc::internal::CallNoOp<6> >::FillOps(grpc::internal::Call*) + 244
       frame #8: 0x00000001002652d8 libarrow_flight.900.dylib`grpc::ClientReader<arrow::flight::protocol::FlightInfo>::ClientReader<arrow::flight::protocol::Criteria>(grpc::ChannelInterface*, grpc::internal::RpcMethod const&, grpc::ClientContext*, arrow::flight::protocol::Criteria const&) + 480
       frame #9: 0x000000010025b550 libarrow_flight.900.dylib`arrow::flight::protocol::FlightService::Stub::ListFlightsRaw(grpc::ClientContext*, arrow::flight::protocol::Criteria const&) + 68
       frame #10: 0x000000010023d408 libarrow_flight.900.dylib`arrow::flight::transport::grpc::(anonymous namespace)::GrpcClientImpl::ListFlights(arrow::flight::FlightCallOptions const&, arrow::flight::Criteria const&, std::__1::unique_ptr<arrow::flight::FlightListing, std::__1::default_delete<arrow::flight::FlightListing> >*) + 168
       frame #11: 0x000000010021ed1c libarrow_flight.900.dylib`arrow::flight::FlightClient::ListFlights(arrow::flight::FlightCallOptions const&, arrow::flight::Criteria const&) + 128
       frame #12: 0x0000000100002bf4 client`DoPutFlightClient::ListFlights(this=0x0000600000c04de0) at client.cc:41:3
       frame #13: 0x00000001000026c4 client`RunMain(argc=1, argv=0x000000016fdfed68) at client.cc:79:13
       frame #14: 0x0000000100002f70 client`main(argc=1, argv=0x000000016fdfed68) at client.cc:92:18
       frame #15: 0x000000018433be50 dyld`start + 2544
   ```
   </details>
   
   Is my use what this issue is about?


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