Changes for use of proxy-wasm in envoy-wasm. (proxy-wasm#11)

 Signed-off-by: John Plevyak <jplevyak@gmail.com> * Fix test. Signed-off-by: John Plevyak <jplevyak@gmail.com> * Remove overflow. Signed-off-by: John Plevyak <jplevyak@gmail.com>

Author: jplevyak

proxy_wasm_api.h

@@ -746,6 +746,14 @@ inline WasmResult getBufferStatus(WasmBufferType type, size_t *size, uint32_t *f
  return proxy_get_buffer_status(type, size, flags);
 }
 
+inline WasmResult setBuffer(WasmBufferType type, size_t start, size_t length, StringView data,
+ size_t *new_size = nullptr) {
+ auto result = proxy_set_buffer_bytes(type, start, length, data.data(), data.size());
+ if (result == WasmResult::Ok && new_size)
+ *new_size = *new_size - length + data.size();
+ return result;
+}
+
 // HTTP
 
 inline void MakeHeaderStringPairsBuffer(const HeaderStringPairs &headers, void **buffer_ptr,

proxy_wasm_externs.h

@@ -112,6 +112,8 @@ extern "C" WasmResult proxy_get_buffer_bytes(WasmBufferType type, uint32_t start
  const char **ptr, size_t *size);
 extern "C" WasmResult proxy_get_buffer_status(WasmBufferType type, size_t *length_ptr,
  uint32_t *flags_ptr);
+extern "C" WasmResult proxy_set_buffer_bytes(WasmBufferType type, uint32_t start, uint32_t length,
+ const char *ptr, size_t size);
 
 // HTTP
 extern "C" WasmResult proxy_http_call(const char *uri_ptr, size_t uri_size, void *header_pairs_ptr,
@@ -175,8 +177,6 @@ extern "C" FilterMetadataStatus proxy_on_response_metadata(uint32_t context_id,
 // HTTP/gRPC.
 extern "C" void proxy_on_http_call_response(uint32_t context_id, uint32_t token, uint32_t headers,
  uint32_t body_size, uint32_t trailers);
-extern "C" void proxy_on_grpc_create_initial_metadata(uint32_t context_id, uint32_t token,
- uint32_t headers);
 extern "C" void proxy_on_grpc_receive_initial_metadata(uint32_t context_id, uint32_t token,
  uint32_t headers);
 extern "C" void proxy_on_grpc_trailing_metadata(uint32_t context_id, uint32_t token,

proxy_wasm_intrinsics.js

@@ -40,6 +40,7 @@ mergeInto(LibraryManager.library, {
  proxy_remove_header_map_value: function () {},
  proxy_get_buffer_bytes: function () {},
  proxy_get_buffer_status: function () {},
+ proxy_set_buffer_bytes: function () {},
  proxy_http_call: function () {},
  proxy_define_metric: function () {},
  proxy_increment_metric: function () {},