Allow more general flags to be passed to ObjC API

src/objective-c/GRPCClient/GRPCCall.h

@@ -230,7 +230,7 @@ extern id const kGRPCTrailersKey;
 - (instancetype)initWithHost:(NSString *)host
                         path:(NSString *)path
               requestsWriter:(GRXWriter *)requestsWriter
-                 http2Method:(NSString *)http2Method NS_DESIGNATED_INITIALIZER;
+                       flags:(uint32_t)flags NS_DESIGNATED_INITIALIZER;
 
 /**
  * Finishes the request side of this call, notifies the server that the RPC should be cancelled, and

src/objective-c/GRPCClient/GRPCCall.m

@@ -75,7 +75,7 @@ NSString * const kGRPCTrailersKey = @"io.grpc.TrailersKey";
 
   NSString *_host;
   NSString *_path;
-  NSString *_http2Method;
+  uint32_t _flags;
   GRPCWrappedCall *_wrappedCall;
   GRPCConnectivityMonitor *_connectivityMonitor;
 
@@ -110,20 +110,20 @@ NSString * const kGRPCTrailersKey = @"io.grpc.TrailersKey";
 }
 
 - (instancetype)init {
-  return [self initWithHost:nil path:nil requestsWriter:nil http2Method:nil];
+  return [self initWithHost:nil path:nil requestsWriter:nil flags:0];
 }
 
 - (instancetype)initWithHost:(NSString *)host
                         path:(NSString *)path
               requestsWriter:(GRXWriter *)requestWriter{
-  return [self initWithHost:host path:path requestsWriter:requestWriter http2Method:@"POST"];
+  return [self initWithHost:host path:path requestsWriter:requestWriter flags:0];
 }
 
 // Designated initializer
 - (instancetype)initWithHost:(NSString *)host
                         path:(NSString *)path
               requestsWriter:(GRXWriter *)requestWriter
-                 http2Method:(NSString *)http2Method {
+                       flags:(uint32_t)flags {
   if (!host || !path) {
     [NSException raise:NSInvalidArgumentException format:@"Neither host nor path can be nil."];
   }
@@ -134,7 +134,7 @@ NSString * const kGRPCTrailersKey = @"io.grpc.TrailersKey";
   if ((self = [super init])) {
     _host = [host copy];
     _path = [path copy];
-    _http2Method = http2Method;
+    _flags = flags;
 
     // Serial queue to invoke the non-reentrant methods of the grpc_call object.
     _callQueue = dispatch_queue_create("io.grpc.call", NULL);
@@ -240,7 +240,7 @@ NSString * const kGRPCTrailersKey = @"io.grpc.TrailersKey";
 - (void)sendHeaders:(NSDictionary *)headers {
   // TODO(jcanizales): Add error handlers for async failures
   [_wrappedCall startBatchWithOperations:@[[[GRPCOpSendMetadata alloc] initWithMetadata:headers
-                                                                            http2Method:_http2Method
+                                                                                  flags:_flags
                                                                                 handler:nil]]];
 }
 

src/objective-c/GRPCClient/private/GRPCWrappedCall.h

@@ -48,7 +48,7 @@
                          handler:(void(^)())handler;
 
 - (instancetype)initWithMetadata:(NSDictionary *)metadata
-                     http2Method:(NSString *)http2Method
+                           flags:(uint32_t)flags
                          handler:(void(^)())handler NS_DESIGNATED_INITIALIZER;
 
 @end

src/objective-c/GRPCClient/private/GRPCWrappedCall.m

@@ -64,16 +64,16 @@
 @implementation GRPCOpSendMetadata
 
 - (instancetype)init {
-  return [self initWithMetadata:nil http2Method:nil handler:nil];
+  return [self initWithMetadata:nil flags:0 handler:nil];
 }
 
 - (instancetype)initWithMetadata:(NSDictionary *)metadata
                          handler:(void (^)())handler {
-  return [self initWithMetadata:metadata http2Method:@"POST" handler:handler];
+  return [self initWithMetadata:metadata flags:0 handler:handler];
 }
 
 - (instancetype)initWithMetadata:(NSDictionary *)metadata
-                     http2Method:(NSString *)http2Method
+                           flags:(uint32_t)flags
                          handler:(void (^)())handler {
   if (self = [super init]) {
     _op.op = GRPC_OP_SEND_INITIAL_METADATA;
@@ -81,9 +81,7 @@
     _op.data.send_initial_metadata.metadata = metadata.grpc_metadataArray;
     _op.data.send_initial_metadata.maybe_compression_level.is_set = false;
     _op.data.send_initial_metadata.maybe_compression_level.level = 0;
-    if ([http2Method isEqualToString:@"PUT"]) {
+    _op.flags = flags;
-      _op.flags = GRPC_INITIAL_METADATA_IDEMPOTENT_REQUEST;
-    }
     _handler = handler;
   }
   return self;

src/objective-c/ProtoRPC/ProtoRPC.h

@@ -48,7 +48,7 @@ __attribute__((deprecated("Please use GRPCProtoCall.")))
               requestsWriter:(GRXWriter *)requestsWriter
                responseClass:(Class)responseClass
           responsesWriteable:(id<GRXWriteable>)responsesWriteable
-                 http2Method:(NSString *)http2Method NS_DESIGNATED_INITIALIZER;
+                       flags:(uint32_t)flags NS_DESIGNATED_INITIALIZER;
 
 - (void)start;
 @end

src/objective-c/ProtoRPC/ProtoRPC.m

@@ -66,7 +66,7 @@ static NSError *ErrorForBadProto(id proto, Class expectedClass, NSError *parsing
 - (instancetype)initWithHost:(NSString *)host
                         path:(NSString *)path
               requestsWriter:(GRXWriter *)requestsWriter
-                 http2Method:(NSString *)http2Method {
+                       flags:(uint32_t)flags {
   [NSException raise:NSInvalidArgumentException
               format:@"Please use ProtoRPC's designated initializer instead."];
   return nil;
@@ -79,7 +79,7 @@ static NSError *ErrorForBadProto(id proto, Class expectedClass, NSError *parsing
               requestsWriter:(GRXWriter *)requestsWriter
                responseClass:(Class)responseClass
           responsesWriteable:(id<GRXWriteable>)responsesWriteable
-                 http2Method:(NSString *)http2Method {
+                       flags:(uint32_t)flags {
   // Because we can't tell the type system to constrain the class, we need to check at runtime:
   if (![responseClass respondsToSelector:@selector(parseFromData:error:)]) {
     [NSException raise:NSInvalidArgumentException
@@ -94,7 +94,7 @@ static NSError *ErrorForBadProto(id proto, Class expectedClass, NSError *parsing
     return [proto data];
   }];
   if ((self = [super initWithHost:host path:method.HTTPPath requestsWriter:bytesWriter
-                      http2Method:http2Method])) {
+                            flags:flags])) {
     __weak ProtoRPC *weakSelf = self;
 
     // A writeable that parses the proto messages received.

src/objective-c/ProtoRPC/ProtoService.h

@@ -48,7 +48,7 @@ __attribute__((deprecated("Please use GRPCProtoService.")))
            requestsWriter:(GRXWriter *)requestsWriter
   	        responseClass:(Class)responseClass
   	   responsesWriteable:(id<GRXWriteable>)responsesWriteable
-                   http2Method:(NSString *)http2Method;
+                    flags:(uint32_t)flags;
 @end
 
 

src/objective-c/ProtoRPC/ProtoService.m

@@ -69,7 +69,7 @@
                 requestsWriter:(GRXWriter *)requestsWriter
                  responseClass:(Class)responseClass
             responsesWriteable:(id<GRXWriteable>)responsesWriteable
-                   http2Method:(NSString *)http2Method {
+                         flags:(uint32_t)flags {
   GRPCProtoMethod *methodName = [[GRPCProtoMethod alloc] initWithPackage:_packageName
                                                                  service:_serviceName
                                                                   method:method];
@@ -78,7 +78,7 @@
                               requestsWriter:requestsWriter
                                responseClass:responseClass
                           responsesWriteable:responsesWriteable
-                                 http2Method:http2Method];
+                                       flags:flags];
 }
 @end