Allow parse as json without content-length

Signed-off-by: Marcos Candeia <[email protected]>

src/actors/proxy.ts

@@ -83,7 +83,7 @@ export const actors = {
                       : {},
                   },
                   body: JSON.stringify({
-                    args,
+                    args: args ?? [],
                   }),
                 },
               );

src/actors/runtime.ts

@@ -144,7 +144,7 @@ export class ActorRuntime {
       return new Response(`method not found for the actor`, { status: 404 });
     }
     let args = [];
-    if (req.headers.get("content-length") !== null) {
+    if (req.headers.get("content-type")?.includes("application/json")) {
       const { args: margs } = await req.json();
       args = margs;
     }