diff --git a/examples/httpbin/basic.yml b/examples/httpbin/basic.yml
new file mode 100644
index 00000000..d27d8604
--- /dev/null
+++ b/examples/httpbin/basic.yml
@@ -0,0 +1,89 @@
+config:
+    name: basic test with httpbin
+    base_url: https://httpbin.org/
+
+teststeps:
+-
+    name: headers
+    request:
+        url: /headers
+        method: GET
+    validate:
+        - eq: ["status_code", 200]
+        - eq: [body.headers.Host, "httpbin.org"]
+
+-
+    name: user-agent
+    request:
+        url: /user-agent
+        method: GET
+    validate:
+        - eq: ["status_code", 200]
+#        - startswith: [body.user-agent, "python-requests"]
+
+-
+    name: get without params
+    request:
+        url: /get
+        method: GET
+    validate:
+        - eq: ["status_code", 200]
+        - eq: [body.args, {}]
+
+-
+    name: get with params in url
+    request:
+        url: /get?a=1&b=2
+        method: GET
+    validate:
+        - eq: ["status_code", 200]
+        - eq: [body.args, {'a': '1', 'b': '2'}]
+
+-
+    name: get with params in params field
+    request:
+        url: /get
+        params:
+            a: 1
+            b: 2
+        method: GET
+    validate:
+        - eq: ["status_code", 200]
+        - eq: [body.args, {'a': '1', 'b': '2'}]
+
+-
+    name: set cookie
+    request:
+        url: /cookies/set?name=value
+        method: GET
+    validate:
+        - eq: ["status_code", 200]
+        # - eq: [cookies.name, "value"]
+
+-
+    name: extract cookie
+    request:
+        url: /cookies
+        method: GET
+    validate:
+        - eq: ["status_code", 200]
+        # - eq: [cookies.name, "value"]
+
+-
+    name: post data
+    request:
+        url: /post
+        method: POST
+        headers:
+            Content-Type: application/json
+        data: abc
+    validate:
+        - eq: ["status_code", 200]
+
+-
+    name: validate body length
+    request:
+        url: /spec.json
+        method: GET
+    validate:
+        - len_eq: ["body", 9]
diff --git a/examples/httpbin/basic_test.py b/examples/httpbin/basic_test.py
new file mode 100644
index 00000000..26862a25
--- /dev/null
+++ b/examples/httpbin/basic_test.py
@@ -0,0 +1,96 @@
+# NOTICE: Generated By HttpRunner. DO'NOT EDIT!
+from httprunner import HttpRunner, TConfig, TStep
+
+
+class TestCaseBasic(HttpRunner):
+    config = TConfig(
+        **{
+            "name": "basic test with httpbin",
+            "base_url": "https://httpbin.org/",
+            "path": "examples/httpbin/basic_test.py",
+        }
+    )
+
+    teststeps = [
+        TStep(
+            **{
+                "name": "headers",
+                "request": {"url": "/headers", "method": "GET"},
+                "validate": [
+                    {"eq": ["status_code", 200]},
+                    {"eq": ["body.headers.Host", "httpbin.org"]},
+                ],
+            }
+        ),
+        TStep(
+            **{
+                "name": "user-agent",
+                "request": {"url": "/user-agent", "method": "GET"},
+                "validate": [{"eq": ["status_code", 200]}],
+            }
+        ),
+        TStep(
+            **{
+                "name": "get without params",
+                "request": {"url": "/get", "method": "GET"},
+                "validate": [{"eq": ["status_code", 200]}, {"eq": ["body.args", {}]}],
+            }
+        ),
+        TStep(
+            **{
+                "name": "get with params in url",
+                "request": {"url": "/get?a=1&b=2", "method": "GET"},
+                "validate": [
+                    {"eq": ["status_code", 200]},
+                    {"eq": ["body.args", {"a": "1", "b": "2"}]},
+                ],
+            }
+        ),
+        TStep(
+            **{
+                "name": "get with params in params field",
+                "request": {"url": "/get", "params": {"a": 1, "b": 2}, "method": "GET"},
+                "validate": [
+                    {"eq": ["status_code", 200]},
+                    {"eq": ["body.args", {"a": "1", "b": "2"}]},
+                ],
+            }
+        ),
+        TStep(
+            **{
+                "name": "set cookie",
+                "request": {"url": "/cookies/set?name=value", "method": "GET"},
+                "validate": [{"eq": ["status_code", 200]}],
+            }
+        ),
+        TStep(
+            **{
+                "name": "extract cookie",
+                "request": {"url": "/cookies", "method": "GET"},
+                "validate": [{"eq": ["status_code", 200]}],
+            }
+        ),
+        TStep(
+            **{
+                "name": "post data",
+                "request": {
+                    "url": "/post",
+                    "method": "POST",
+                    "headers": {"Content-Type": "application/json"},
+                    "data": "abc",
+                },
+                "validate": [{"eq": ["status_code", 200]}],
+            }
+        ),
+        TStep(
+            **{
+                "name": "validate body length",
+                "request": {"url": "/spec.json", "method": "GET"},
+                "validate": [{"len_eq": ["body", 9]}],
+            }
+        ),
+    ]
+
+
+if __name__ == "__main__":
+    TestCaseBasic().test_start()
diff --git a/examples/httpbin/upload.yml b/examples/httpbin/upload.yml
new file mode 100644
index 00000000..5eff4cbf
--- /dev/null
+++ b/examples/httpbin/upload.yml
@@ -0,0 +1,30 @@
+config:
+    name: test upload file with httpbin
+    base_url: ${get_httpbin_server()}
+
+teststeps:
+-
+    name: upload file
+    variables:
+        file_path: "test.env"
+        m_encoder: ${multipart_encoder(file=$file_path)}
+    request:
+        url: /post
+        method: POST
+        headers:
+            Content-Type: ${multipart_content_type($m_encoder)}
+        data: $m_encoder
+    validate:
+        - eq: ["status_code", 200]
+        - startswith: ["body.files.file", "UserName=test"]
+
+-
+    name: upload file with keyword
+    request:
+        url: /post
+        method: POST
+        upload:
+            file: "test.env"
+    validate:
+        - eq: ["status_code", 200]
+        - startswith: ["body.files.file", "UserName=test"]
diff --git a/examples/httpbin/upload_test.py b/examples/httpbin/upload_test.py
new file mode 100644
index 00000000..ca418a4e
--- /dev/null
+++ b/examples/httpbin/upload_test.py
@@ -0,0 +1,54 @@
+# NOTICE: Generated By HttpRunner. DO'NOT EDIT!
+from httprunner import HttpRunner, TConfig, TStep
+
+
+class TestCaseUpload(HttpRunner):
+    config = TConfig(
+        **{
+            "name": "test upload file with httpbin",
+            "base_url": "${get_httpbin_server()}",
+            "path": "examples/httpbin/upload_test.py",
+        }
+    )
+
+    teststeps = [
+        TStep(
+            **{
+                "name": "upload file",
+                "variables": {
+                    "file_path": "test.env",
+                    "m_encoder": "${multipart_encoder(file=$file_path)}",
+                },
+                "request": {
+                    "url": "/post",
+                    "method": "POST",
+                    "headers": {
+                        "Content-Type": "${multipart_content_type($m_encoder)}"
+                    },
+                    "data": "$m_encoder",
+                },
+                "validate": [
+                    {"eq": ["status_code", 200]},
+                    {"startswith": ["body.files.file", "UserName=test"]},
+                ],
+            }
+        ),
+        TStep(
+            **{
+                "name": "upload file with keyword",
+                "request": {
+                    "url": "/post",
+                    "method": "POST",
+                    "upload": {"file": "test.env"},
+                },
+                "validate": [
+                    {"eq": ["status_code", 200]},
+                    {"startswith": ["body.files.file", "UserName=test"]},
+                ],
+            }
+        ),
+    ]
+
+
+if __name__ == "__main__":
+    TestCaseUpload().test_start()
diff --git a/examples/httpbin/validate.yml b/examples/httpbin/validate.yml
new file mode 100644
index 00000000..c45e2ffd
--- /dev/null
+++ b/examples/httpbin/validate.yml
@@ -0,0 +1,35 @@
+config:
+    name: basic test with httpbin
+    base_url: http://httpbin.org/
+
+teststeps:
+-
+    name: validate response with json path
+    request:
+        url: /get
+        params:
+            a: 1
+            b: 2
+        method: GET
+    validate:
+        - eq: ["status_code", 200]
+        - eq: ["body.args.a", 1]
+        - eq: ["body.args.b", 2]
+    validate_script:
+        - "assert status_code == 200"
+
+
+-
+    name: validate response with python script
+    request:
+        url: /get
+        params:
+            a: 1
+            b: 2
+        method: GET
+    validate:
+        - eq: ["status_code", 200]
+    validate_script:
+        - "assert status_code == 201"
+        - "a = response_json.get('args').get('a')"
+        - "assert a == '1'"
diff --git a/examples/httpbin/validate_test.py b/examples/httpbin/validate_test.py
new file mode 100644
index 00000000..e66796dd
--- /dev/null
+++ b/examples/httpbin/validate_test.py
@@ -0,0 +1,43 @@
+# NOTICE: Generated By HttpRunner. DO'NOT EDIT!
+from httprunner import HttpRunner, TConfig, TStep
+
+
+class TestCaseValidate(HttpRunner):
+    config = TConfig(
+        **{
+            "name": "basic test with httpbin",
+            "base_url": "http://httpbin.org/",
+            "path": "examples/httpbin/validate_test.py",
+        }
+    )
+
+    teststeps = [
+        TStep(
+            **{
+                "name": "validate response with json path",
+                "request": {"url": "/get", "params": {"a": 1, "b": 2}, "method": "GET"},
+                "validate": [
+                    {"eq": ["status_code", 200]},
+                    {"eq": ["body.args.a", 1]},
+                    {"eq": ["body.args.b", 2]},
+                ],
+                "validate_script": ["assert status_code == 200"],
+            }
+        ),
+        TStep(
+            **{
+                "name": "validate response with python script",
+                "request": {"url": "/get", "params": {"a": 1, "b": 2}, "method": "GET"},
+                "validate": [{"eq": ["status_code", 200]}],
+                "validate_script": [
+                    "assert status_code == 201",
+                    "a = response_json.get('args').get('a')",
+                    "assert a == '1'",
+                ],
+            }
+        ),
+    ]
+
+
+if __name__ == "__main__":
+    TestCaseValidate().test_start()
diff --git a/httprunner/client.py b/httprunner/client.py
index 0a99020c..b9606e3f 100644
--- a/httprunner/client.py
+++ b/httprunner/client.py
@@ -36,22 +36,22 @@ def get_req_resp_record(resp_obj: Response) -> ReqRespData:
         logger.debug(msg)
 
     # record actual request info
+    request_headers = dict(resp_obj.request.headers)
+    request_body = resp_obj.request.body
+
+    if request_body:
+        request_content_type = lower_dict_keys(request_headers).get("content-type")
+        if request_content_type and "multipart/form-data" in request_content_type:
+            # upload file type
+            request_body = "upload file stream (OMITTED)"
+
     request_data = RequestData(
         method=resp_obj.request.method,
         url=resp_obj.request.url,
-        headers=dict(resp_obj.request.headers),
-        body=resp_obj.request.body,
+        headers=request_headers,
+        body=request_body,
     )
 
-    request_body = resp_obj.request.body
-    if request_body:
-        request_content_type = lower_dict_keys(request_data.headers).get("content-type")
-        if request_content_type and "multipart/form-data" in request_content_type:
-            # upload file type
-            request_data.body = "upload file stream (OMITTED)"
-        else:
-            request_data.body = request_body
-
     # log request details in debug mode
     log_print(request_data, "request")
 
diff --git a/httprunner/ext/uploader/__init__.py b/httprunner/ext/uploader/__init__.py
index 7963ee15..97a36dc2 100644
--- a/httprunner/ext/uploader/__init__.py
+++ b/httprunner/ext/uploader/__init__.py
@@ -45,6 +45,9 @@ For compatibility, you can also write upload test script in old way:
 import os
 import sys
 
+from httprunner.parser import parse_variables_mapping
+from httprunner.schema import TStep, FunctionsMapping
+
 try:
     import filetype
     from requests_toolbelt import MultipartEncoder
@@ -57,16 +60,13 @@ $ pip install requests_toolbelt filetype
     print(msg)
     sys.exit(0)
 
-from httprunner.exceptions import ParamsError
 
-
-def prepare_upload_test(test_dict):
+def prepare_upload_step(step: TStep, functions: FunctionsMapping):
     """ preprocess for upload test
         replace `upload` info with MultipartEncoder
 
     Args:
-        test_dict (dict):
-
+        step: teststep
             {
                 "variables": {},
                 "request": {
@@ -81,26 +81,26 @@ def prepare_upload_test(test_dict):
                     }
                 }
             }
+        functions: functions mapping
 
     """
-    upload_json = test_dict["request"].pop("upload", {})
-    if not upload_json:
-        raise ParamsError(f"invalid upload info: {upload_json}")
+    if not step.request.upload:
+        return
 
     params_list = []
-    for key, value in upload_json.items():
-        test_dict["variables"][key] = value
+    for key, value in step.request.upload.items():
+        step.variables[key] = value
         params_list.append(f"{key}=${key}")
 
     params_str = ", ".join(params_list)
-    test_dict["variables"]["m_encoder"] = "${multipart_encoder(" + params_str + ")}"
+    step.variables["m_encoder"] = "${multipart_encoder(" + params_str + ")}"
 
-    test_dict["request"].setdefault("headers", {})
-    test_dict["request"]["headers"][
-        "Content-Type"
-    ] = "${multipart_content_type($m_encoder)}"
+    # parse variables
+    step.variables = parse_variables_mapping(step.variables, functions)
 
-    test_dict["request"]["data"] = "$m_encoder"
+    step.request.headers["Content-Type"] = "${multipart_content_type($m_encoder)}"
+
+    step.request.data = "$m_encoder"
 
 
 def multipart_encoder(**kwargs):
diff --git a/httprunner/loader_test.py b/httprunner/loader_test.py
index 6cefbcb5..dac77804 100644
--- a/httprunner/loader_test.py
+++ b/httprunner/loader_test.py
@@ -125,4 +125,3 @@ class TestLoader(unittest.TestCase):
             loader.locate_file("examples/httpbin/", "debugtalk.py"),
             os.path.join(os.getcwd(), "examples/httpbin/debugtalk.py"),
         )
-
diff --git a/httprunner/runner.py b/httprunner/runner.py
index b61bfcf1..ab833ead 100644
--- a/httprunner/runner.py
+++ b/httprunner/runner.py
@@ -8,6 +8,7 @@ from loguru import logger
 from httprunner import utils, exceptions
 from httprunner.client import HttpSession
 from httprunner.exceptions import ValidationFailure, ParamsError
+from httprunner.ext.uploader import prepare_upload_step
 from httprunner.loader import load_project_meta, load_testcase_file
 from httprunner.parser import build_url, parse_data, parse_variables_mapping
 from httprunner.response import ResponseObject
@@ -53,7 +54,9 @@ class HttpRunner(object):
         step_data = StepData(name=step.name)
 
         # parse
+        prepare_upload_step(step, self.__project_meta.functions)
         request_dict = step.request.dict()
+        request_dict.pop("upload", None)
         parsed_request_dict = parse_data(
             request_dict, step.variables, self.__project_meta.functions
         )
diff --git a/httprunner/runner_test.py b/httprunner/runner_test.py
index 9635ac4f..ca84584f 100644
--- a/httprunner/runner_test.py
+++ b/httprunner/runner_test.py
@@ -13,12 +13,8 @@ class TestHttpRunner(unittest.TestCase):
         )
         result = self.runner.get_summary()
         self.assertTrue(result.success)
-        self.assertEqual(
-            result.name, "request methods testcase with variables"
-        )
-        self.assertEqual(
-            result.step_datas[0].name, "get with params"
-        )
+        self.assertEqual(result.name, "request methods testcase with variables")
+        self.assertEqual(result.step_datas[0].name, "get with params")
         self.assertEqual(len(result.step_datas), 3)
 
     def test_run_testcase_by_path_ref_testcase(self):
@@ -27,10 +23,6 @@ class TestHttpRunner(unittest.TestCase):
         )
         result = self.runner.get_summary()
         self.assertTrue(result.success)
-        self.assertEqual(
-            result.name, "request methods testcase: reference testcase"
-        )
-        self.assertEqual(
-            result.step_datas[0].name, "request with variables"
-        )
+        self.assertEqual(result.name, "request methods testcase: reference testcase")
+        self.assertEqual(result.step_datas[0].name, "request with variables")
         self.assertEqual(len(result.step_datas), 1)
diff --git a/httprunner/schema.py b/httprunner/schema.py
index 906e31a0..4ea1e797 100644
--- a/httprunner/schema.py
+++ b/httprunner/schema.py
@@ -56,6 +56,7 @@ class Request(BaseModel):
     timeout: int = 120
     allow_redirects: bool = True
     verify: Verify = False
+    upload: Dict = {}  # used for upload files
 
 
 class TStep(BaseModel):
@@ -107,7 +108,7 @@ class RequestData(BaseModel):
     url: Url
     headers: Headers = {}
     # TODO: add cookies
-    body: Union[Text, Dict] = {}
+    body: Union[Text, bytes, Dict, None] = {}
 
 
 class ResponseData(BaseModel):
@@ -137,6 +138,7 @@ class SessionData(BaseModel):
 
 class StepData(BaseModel):
     """teststep data, each step maybe corresponding to one request or one testcase"""
+
     success: bool = False
     name: Text = ""  # teststep name
     data: Union[SessionData, List[SessionData]] = None