fix handling of request bodies

client/tests/run_tests.py

@@ -55,5 +55,8 @@ class JSTest(unittest.TestCase):
   def test_http_session(self):
     self.run_test("test_http_session.js")
 
+  def test_post(self):
+    self.run_test("test_post.js")
+
 if __name__ == "__main__":
   unittest.main()

client/tests/scripts/test_post.js

@@ -0,0 +1,10 @@
+async function test() {
+  let payload = "hello".repeat(100);
+  let r = await libcurl.fetch("https://httpbin.org/anything", {
+    method: "POST",
+    body: new Blob([payload], {type: "text/plain"})
+  });
+  assert(r.status === 200, "wrong status");
+  let json = await r.json();
+  assert(json.data === payload, "server reports wrong payload");
+}