Fix: add content-type header when request has body

codegen/parser/data.py

@@ -62,6 +62,7 @@ class RequestBodyData:
 
     type: Literal["form", "json", "file", "raw"]
     body_schema: SchemaData
+    content_type: str | None = None
     required: bool = False
 
     @property

codegen/parser/endpoints/request_body.py

@@ -10,6 +10,13 @@
     from ...source import Source
 
 
+DEFAULT_JSON_CONTENT_TYPE = "application/json"
+DEFAULT_FORM_CONTENT_TYPE = "application/x-www-form-urlencoded"
+DEFAULT_MULTIPART_CONTENT_TYPE = "multipart/form-data"
+DEFAULT_TEXT_CONTENT_TYPE = "text/plain"
+DEFAULT_BINARY_CONTENT_TYPE = "application/octet-stream"
+
+
 def build_request_body(source: "Source", prefix: str) -> RequestBodyData:
     data = type_ref_from_source(source, oas.RequestBody)
 
@@ -19,53 +26,78 @@ def build_request_body(source: "Source", prefix: str) -> RequestBodyData:
 
     media_types = list(data.content.keys())
     if json_types := [type for type in media_types if "json" in type]:
-        json_type = json_types[0]
+        json_type = (
+            DEFAULT_JSON_CONTENT_TYPE
+            if DEFAULT_JSON_CONTENT_TYPE in json_types
+            else json_types[0]
+        )
         return RequestBodyData(
             type="json",
             body_schema=parse_schema(
                 source / "content" / json_type / "schema",
                 concat_snake_name(prefix, "body"),
             ),
+            content_type=json_type,
             required=data.required,
         )
-    elif form_types := [type for type in media_types if "form" in type]:
-        form_type = form_types[0]
+    elif file_types := [type for type in media_types if "multipart" in type]:
+        file_type = (
+            DEFAULT_MULTIPART_CONTENT_TYPE
+            if DEFAULT_MULTIPART_CONTENT_TYPE in file_types
+            else file_types[0]
+        )
         return RequestBodyData(
-            type="form",
+            type="file",
             body_schema=parse_schema(
-                source / "content" / form_type / "schema",
+                source / "content" / file_type / "schema",
                 concat_snake_name(prefix, "body"),
             ),
+            content_type=file_type,
             required=data.required,
         )
-    elif file_types := [type for type in media_types if "multipart" in type]:
-        file_type = file_types[0]
+    elif form_types := [type for type in media_types if "form" in type]:
+        form_type = (
+            DEFAULT_FORM_CONTENT_TYPE
+            if DEFAULT_FORM_CONTENT_TYPE in form_types
+            else form_types[0]
+        )
         return RequestBodyData(
-            type="file",
+            type="form",
             body_schema=parse_schema(
-                source / "content" / file_type / "schema",
+                source / "content" / form_type / "schema",
                 concat_snake_name(prefix, "body"),
             ),
+            content_type=form_type,
             required=data.required,
         )
     elif text_types := [type for type in media_types if "text" in type]:
-        text_type = text_types[0]
+        text_type = (
+            DEFAULT_TEXT_CONTENT_TYPE
+            if DEFAULT_TEXT_CONTENT_TYPE in text_types
+            else text_types[0]
+        )
         return RequestBodyData(
             type="raw",
             body_schema=parse_schema(
                 source / "content" / text_type / "schema",
                 concat_snake_name(prefix, "body"),
             ),
+            content_type=text_type,
             required=data.required,
         )
     elif binary_types := [type for type in media_types if "octet-stream" in type]:
-        binary_type = binary_types[0]
+        binary_type = (
+            DEFAULT_BINARY_CONTENT_TYPE
+            if DEFAULT_BINARY_CONTENT_TYPE in binary_types
+            else binary_types[0]
+        )
         return RequestBodyData(
             type="raw",
             body_schema=parse_schema(
                 source / "content" / binary_type / "schema",
                 concat_snake_name(prefix, "body"),
             ),
+            content_type=binary_type,
             required=data.required,
         )
     elif "*/*" in media_types:
@@ -75,6 +107,7 @@ def build_request_body(source: "Source", prefix: str) -> RequestBodyData:
                 source / "content" / "*/*" / "schema",
                 concat_snake_name(prefix, "body"),
             ),
+            content_type=None,
             required=data.required,
         )
 

codegen/templates/rest/_request.py.jinja

@@ -20,11 +20,14 @@ params = {
 {% endif %}
 {% endmacro %}
 
-{% macro build_header(params) %}
+{% macro build_header(params, request_body) %}
 headers = {
     {% for param in params %}
     "{{ param.name }}": {{ param.prop_name }},
     {% endfor %}
+    {% if request_body and request_body.content_type %}
+    "Content-Type": "{{ request_body.content_type }}",
+    {% endif %}
     "X-GitHub-Api-Version": self._REST_API_VERSION,
     **(headers or {})
 }
@@ -79,7 +82,7 @@ if self._github.config.rest_api_body_validation:
 
 {{ build_path(endpoint) }}
 {{ build_query(endpoint.query_params) }}
-{{ build_header(endpoint.header_params) }}
+{{ build_header(endpoint.header_params, endpoint.request_body) }}
 {{ build_cookie(endpoint.cookie_params) }}
 {% if endpoint.request_body %}
 {{ build_body(endpoint.request_body) }}