- Make CurlClient fail fast

- Fix CurlClient file dependent features for the case of several instances

framework/curl_client.py

@@ -153,6 +153,10 @@ def requests(self, value):
     @property
     def responses(self) -> List[CurlResponse]:
         """List of all received responses."""
+        if not self.dump_headers:
+            raise ValueError(
+                "'dump_headers' argument must be enabled for using 'responses' property"
+            )
         return list(self._responses)
 
     @property
@@ -165,6 +169,10 @@ def statuses(self) -> Dict[int, int]:
         """Received statuses counters, like:
         {200: 1, 400: 2}
         """
+        if not self.dump_headers:
+            raise ValueError(
+                "'dump_headers' argument must be enabled for using 'statuses' property"
+            )
         return dict(self._statuses)
 
     @statuses.setter
@@ -180,7 +188,7 @@ def last_stats(self) -> Dict[str, Any]:
         return (self._stats or [None])[-1]
 
     @property
-    def stats(self) -> List[Dict[int, int]]:
+    def stats(self) -> List[Dict[str, Any]]:
         """List of stats of all transfers"""
         return list(self._stats)
 
@@ -193,17 +201,20 @@ def binary_version(self) -> Optional[str]:
     @property
     def cookie_jar_path(self):
         """Path to save/load cookies."""
-        return Path(self.workdir) / "curl-default.jar"
+        # fix for the case of several client instances
+        return Path(self.workdir) / f"curl-{id(self)}.jar"
 
     @property
     def output_path(self):
         """Path to write stdout (response)."""
-        return Path(self.workdir) / "curl-output"
+        # fix for the case of several client instances
+        return Path(self.workdir) / f"curl-output-{id(self)}"
 
     @property
     def headers_dump_path(self):
         """Path do dump received headers."""
-        return Path(self.workdir) / "curl-default.hdr"
+        # fix for the case of several client instances
+        return Path(self.workdir) / f"curl-{id(self)}.hdr"
 
     @property
     def cookie_string(self) -> str:
@@ -222,6 +233,10 @@ def clear_stats(self):
         self._stats = []
 
     def form_command(self):
+        if self.parallel and self.dump_headers:
+            # TODO #488
+            raise ValueError("--parallel and --dump-header don't work together properly")
+
         options = ["--no-progress-meter", "--create-dirs"]
 
         if self.dump_headers:
@@ -264,7 +279,6 @@ def form_command(self):
     def parse_out(self, stdout, stderr):
         if self.dump_headers:
             for dump in filter(None, self._read_headers_dump().split(b"\r\n\r\n")):
-
                 response = CurlResponse(
                     headers_dump=dump,
                     stdout_raw=self._read_output() if not self.disable_output else b"",