fix: python generated code error when without HTTP headers (#465)

e2e/code-generator/entrypoint.sh

@@ -15,12 +15,17 @@ mkdir -p /var/data
 nohup atest server --local-storage '/workspace/test-suites/*.yaml'&
 sleep 1
 
-curl http://localhost:8080/server.Runner/GenerateCode -X POST \
-    -d '{"TestSuite": "test", "TestCase": "requestWithHeader", "Generator": "'"$lang"'"}' > code.json
+test_cases=("requestWithHeader" "requestWithoutHeader")
 
-cat code.json | jq .message -r | sed 's/\\n/\n/g' | sed 's/\\t/\t/g' | sed 's/\\\"/"/g' > code.txt
-cat code.txt
+for test_case in "${test_cases[@]}"
+do
+    curl http://localhost:8080/server.Runner/GenerateCode -X POST \
+        -d '{"TestSuite": "test", "TestCase": "'"${test_case}"'", "Generator": "'"$lang"'"}' > code.json
 
-sh /workspace/${lang}.sh code.txt
+    cat code.json | jq .message -r | sed 's/\\n/\n/g' | sed 's/\\t/\t/g' | sed 's/\\\"/"/g' > code.txt
+    cat code.txt
+
+    sh /workspace/${lang}.sh code.txt
+done
 
 exit 0

e2e/code-generator/test-suites/test-suite.yaml

@@ -7,9 +7,13 @@ param:
   suiteName: test
   caseName: test
 items:
-- name: requestWithHeader
-  request:
-    api: /GetSuites
-    method: POST
-    header:
-      auth: fake
+  - name: requestWithHeader
+    request:
+      api: /GetSuites
+      method: POST
+      header:
+        auth: fake
+  - name: requestWithoutHeader
+    request:
+      api: /GetSuites
+      method: POST

pkg/generator/data/main.python.tpl

@@ -25,9 +25,13 @@ def main():
     {{- else}}
     body = io.BytesIO(b"{{.Request.Body.String}}")
     {{- end}}
+    {{- if gt (len .Request.Header) 0 }}
     {{- range $key, $val := .Request.Header}}
     headers = {"{{$key}}": "{{$val}}"}
     {{- end}}
+    {{- else }}
+    headers = {}
+    {{- end }}
     {{- if gt (len .Request.Cookie) 0 }}
     {{- range $key, $val := .Request.Cookie}}
     cookies = {"{{$key}}": "{{$val}}"}

pkg/server/remote_server.go

@@ -203,7 +203,6 @@ func (s *server) Run(ctx context.Context, task *TestTask) (reply *TestResult, er
 	task.Env = withDefaultValue(task.Env, map[string]string{}).(map[string]string)
 
 	var suite *testing.TestSuite
-
 	// TODO may not safe in multiple threads
 	oldEnv := map[string]string{}
 	for key, val := range task.Env {
@@ -632,7 +631,6 @@ func (s *server) ListCodeGenerator(ctx context.Context, in *Empty) (reply *Simpl
 
 func (s *server) GenerateCode(ctx context.Context, in *CodeGenerateRequest) (reply *CommonResult, err error) {
 	reply = &CommonResult{}
-
 	instance := generator.GetCodeGenerator(in.Generator)
 	if instance == nil {
 		reply.Success = false
@@ -652,6 +650,7 @@ func (s *server) GenerateCode(ctx context.Context, in *CodeGenerateRequest) (rep
 		}
 
 		if result, err = loader.GetTestCase(in.TestSuite, in.TestCase); err == nil {
+
 			result.Request.RenderAPI(suite.API)
 
 			output, genErr := instance.Generate(&suite, &result)