Fix compatibility with Proxy-Wasm ABI v0.1.0.

bazel/repository_locations.bzl

@@ -495,9 +495,9 @@ DEPENDENCY_REPOSITORIES = dict(
         cpe = "N/A",
     ),
     proxy_wasm_cpp_host = dict(
-        sha256 = "41c48f430bce1370abc1d0d56b82abeffc59af43309951cbf064a001e689fe19",
-        strip_prefix = "proxy-wasm-cpp-host-56593833008e677a99b51a78cd480391f298e226",
-        urls = ["https://github.com/proxy-wasm/proxy-wasm-cpp-host/archive/56593833008e677a99b51a78cd480391f298e226.tar.gz"],
+        sha256 = "ba42fd5a8f341cd8be49bc5470e850827127b792aa45897676eeb03385857232",
+        strip_prefix = "proxy-wasm-cpp-host-a013d522304658b8b79a9847381a3182b845d4df",
+        urls = ["https://github.com/proxy-wasm/proxy-wasm-cpp-host/archive/a013d522304658b8b79a9847381a3182b845d4df.tar.gz"],
         use_category = ["dataplane"],
         cpe = "N/A",
     ),

source/extensions/common/wasm/context.cc

@@ -583,7 +583,12 @@ WasmResult Context::getHeaderMapValue(WasmHeaderMapType type, absl::string_view
   const Http::LowerCaseString lower_key{std::string(key)};
   auto entry = map->get(lower_key);
   if (!entry) {
-    return WasmResult::NotFound;
+    if (wasm()->abiVersion() == proxy_wasm::AbiVersion::ProxyWasm_0_1_0) {
+      *value = "";
+      return WasmResult::Ok;
+    } else {
+      return WasmResult::NotFound;
+    }
   }
   *value = entry->value().getStringView();
   return WasmResult::Ok;
@@ -1028,18 +1033,22 @@ bool Context::validateConfiguration(absl::string_view configuration,
   if (!wasm()->validate_configuration_) {
     return true;
   }
-  configuration_ = configuration;
   plugin_ = plugin_base;
   auto result =
       wasm()
           ->validate_configuration_(this, id_, static_cast<uint32_t>(configuration.size()))
           .u64_ != 0;
   plugin_.reset();
-  configuration_ = "";
   return result;
 }
 
-absl::string_view Context::getConfiguration() { return configuration_; }
+absl::string_view Context::getConfiguration() {
+  if (plugin_) {
+    return plugin_->plugin_configuration_;
+  } else {
+    return wasm()->vm_configuration();
+  }
+};
 
 std::pair<uint32_t, absl::string_view> Context::getStatus() {
   return std::make_pair(status_code_, status_message_);

source/extensions/common/wasm/context.h

@@ -406,8 +406,7 @@ class Context : public proxy_wasm::ContextBase,
   Envoy::Http::StreamDecoderFilterCallbacks* decoder_callbacks_{};
   Envoy::Http::StreamEncoderFilterCallbacks* encoder_callbacks_{};
 
-  // General state. Only available (non-nullptr) during the calls requiring it (e.g. onConfigure()).
-  absl::string_view configuration_;
+  // Status.
   uint32_t status_code_{0};
   absl::string_view status_message_;