fix(oas): add support for multipart subtypes

packages/oas/src/converter/parts/postdata/BodyConverter.ts

@@ -50,6 +50,8 @@ export abstract class BodyConverter<T extends OpenAPI.Document>
     };
   }
 
+  // TODO: move the logic that receives the content type from the encoding object
+  //  to the {@link Oas3RequestBodyConverter} class.
   // eslint-disable-next-line complexity
   protected encodeValue({
     value,
@@ -72,7 +74,19 @@ export abstract class BodyConverter<T extends OpenAPI.Document>
         return this.encodeXml(value, schema);
       case 'multipart/form-data':
       case 'multipart/mixed':
-        return this.encodeMultipartFormData(value, fields, schema);
+      case 'multipart/alternative':
+      case 'multipart/related':
+        return this.encodeMultipart(
+          Object.entries(value || {}).map(([key, val]: [string, unknown]) =>
+            this.createPart({
+              key,
+              schema,
+              fields,
+              value: val,
+              formData: mime.startsWith('multipart/form-data')
+            })
+          )
+        );
       case 'image/x-icon':
       case 'image/ico':
       case 'image/vnd.microsoft.icon':
@@ -101,43 +115,72 @@ export abstract class BodyConverter<T extends OpenAPI.Document>
       : encoded;
   }
 
-  // TODO: move the logic that receives the content type from the encoding object
-  //  to the {@link Oas3RequestBodyConverter} class.
-  private encodeMultipartFormData(
-    value: unknown,
-    fields?: Record<string, OpenAPIV3.EncodingObject>,
-    schema?: OpenAPIV3.SchemaObject | OpenAPIV2.SchemaObject
+  private encodeMultipart(
+    parts: {
+      content: unknown;
+      contentType?: string;
+      base64Encoded?: boolean;
+      rawHeaders?: string[];
+    }[]
   ): string {
     const EOL = '\r\n';
 
-    return Object.entries(value || {})
-      .map(([key, val]: [string, unknown]) => {
-        const propertySchema = this.getPropertySchema(key, schema);
-        const contentType =
-          fields?.[key]?.contentType ??
-          this.inferContentType(val, propertySchema);
-
-        const headers = [
-          `Content-Disposition: form-data; name="${key}"${
-            this.filenameRequired(contentType) ? `; filename="${key}"` : ''
-          }`,
+    return parts
+      .map(({ content, contentType, base64Encoded, rawHeaders }) => {
+        const headers: string[] = [
+          ...(rawHeaders ?? []),
           ...(contentType !== 'text/plain'
             ? [`Content-Type: ${contentType}`]
             : []),
-          ...(this.BASE64_FORMATS.includes(propertySchema?.format)
-            ? ['Content-Transfer-Encoding: base64']
-            : [])
+          ...(base64Encoded ? ['Content-Transfer-Encoding: base64'] : [])
         ];
-        const body = this.encodeOther(val);
 
         return `--${this.BOUNDARY}${EOL}${headers.join(
           EOL
-        )}${EOL}${EOL}${body}`;
+        )}${EOL}${EOL}${content}`;
       })
       .join(EOL)
       .concat(`${EOL}--${this.BOUNDARY}--`);
   }
 
+  private createPart({
+    key,
+    value,
+    schema,
+    fields,
+    formData
+  }: {
+    key: string;
+    value: unknown;
+    schema?: OpenAPIV3.SchemaObject | OpenAPIV2.SchemaObject;
+    fields?: Record<string, OpenAPIV3.EncodingObject>;
+    formData?: boolean;
+  }): {
+    content: string;
+    rawHeaders?: string[];
+    base64Encoded?: boolean;
+    contentType?: string;
+  } {
+    const propertySchema = this.getPropertySchema(key, schema);
+    const contentType =
+      fields?.[key]?.contentType ??
+      this.inferContentType(value, propertySchema);
+    const content = this.encodeOther(value);
+
+    return {
+      content,
+      contentType,
+      rawHeaders: formData
+        ? [
+            `Content-Disposition: form-data; name="${key}"${
+              this.filenameRequired(contentType) ? `; filename="${key}"` : ''
+            }`
+          ]
+        : [],
+      base64Encoded: this.BASE64_FORMATS.includes(propertySchema?.format)
+    };
+  }
+
   private getPropertySchema(
     key: string,
     schema?: OpenAPIV3.SchemaObject | OpenAPIV2.SchemaObject

packages/oas/tests/fixtures/multipart.oas.result.json

@@ -1,25 +1,40 @@
 [
   {
-    "queryString": [],
-    "url": "https://petstore.swagger.io/v2/pet",
-    "method": "PUT",
+    "bodySize": 0,
+    "cookies": [],
     "headers": [
       {
-        "value": "multipart/form-data",
-        "name": "content-type"
-      },
-      {
-        "name": "authorization",
-        "value": "Bearer ZHVtbXkgYmluYXJ5IHNhbXBsZQA="
+        "name": "content-type",
+        "value": "multipart/form-data"
       }
     ],
+    "headersSize": 0,
     "httpVersion": "HTTP/1.1",
+    "method": "PUT",
+    "postData": {
+      "mimeType": "multipart/form-data; boundary=956888039105887155673143",
+      "text": "--956888039105887155673143\r\nContent-Disposition: form-data; name=\"id\"\r\n\r\nfbdf5a53-161e-4460-98ad-0e39408d8689\r\n--956888039105887155673143\r\nContent-Disposition: form-data; name=\"address\"\r\nContent-Type: application/json\r\n\r\n{\"street\":\"lorem\",\"city\":\"lorem\"}\r\n--956888039105887155673143\r\nContent-Disposition: form-data; name=\"profileImage\"\r\nContent-Type: image/png, image/jpeg\r\nContent-Transfer-Encoding: base64\r\n\r\niVBORw0KGgo=\r\n--956888039105887155673143--"
+    },
+    "queryString": [],
+    "url": "https://petstore.swagger.io/v2/pet"
+  },
+  {
+    "bodySize": 0,
     "cookies": [],
+    "headers": [
+      {
+        "name": "content-type",
+        "value": "multipart/alternative"
+      }
+    ],
     "headersSize": 0,
-    "bodySize": 0,
+    "httpVersion": "HTTP/1.1",
+    "method": "POST",
     "postData": {
-      "mimeType": "multipart/form-data; boundary=956888039105887155673143",
-      "text": "--956888039105887155673143\r\nContent-Disposition: form-data; name=\"required\"\r\nContent-Type: application/json\r\n\r\nnull\r\n--956888039105887155673143\r\nContent-Disposition: form-data; name=\"type\"\r\nContent-Type: application/json\r\n\r\nnull\r\n--956888039105887155673143\r\nContent-Disposition: form-data; name=\"properties\"\r\nContent-Type: application/json\r\n\r\nnull\r\n--956888039105887155673143\r\nContent-Disposition: form-data; name=\"xml\"\r\nContent-Type: application/json\r\n\r\nnull\r\n--956888039105887155673143--"
-    }
+      "mimeType": "multipart/alternative; boundary=956888039105887155673143",
+      "text": "--956888039105887155673143\r\nContent-Type: application/octet-stream\r\n\r\n\u0001\u0002\u0003\u0004\u0005\r\n--956888039105887155673143--"
+    },
+    "queryString": [],
+    "url": "https://petstore.swagger.io/v2/pet"
   }
 ]

packages/oas/tests/fixtures/multipart.oas.yaml

@@ -12,110 +12,46 @@ paths:
   /pet:
     put:
       summary: Update an existing pet
-      operationId: updatePet
       requestBody:
         content:
           multipart/form-data:
             schema:
               type: object
               properties:
-                $ref: '#/components/schemas/Pet'
+                id:
+                  type: string
+                  format: uuid
+                address:
+                  type: object
+                  properties:
+                    street:
+                      type: string
+                    city:
+                      type: string
+                profileImage:
+                  type: string
+                  format: base64
+            encoding:
+              profileImage:
+                contentType: image/png, image/jpeg
       responses:
         400:
           description: Invalid ID supplied
           content: {}
-        404:
-          description: Pet not found
-          content: {}
-        405:
-          description: Validation exception
+    post:
+      summary: Create pets
+      requestBody:
+        content:
+          multipart/alternative:
+            schema:
+              type: object
+              properties:
+                filename:
+                  type: array
+                  items:
+                    type: string
+                    format: binary
+      responses:
+        400:
+          description: Invalid ID supplied
           content: {}
-      security:
-        - petstore_auth:
-            - write:pets
-            - read:pets
-components:
-  schemas:
-    Category:
-      type: object
-      properties:
-        id:
-          type: integer
-          format: int64
-        name:
-          type: string
-      xml:
-        name: Category
-    Tag:
-      type: object
-      properties:
-        id:
-          type: integer
-          format: int64
-        name:
-          type: string
-      xml:
-        name: Tag
-    Pet:
-      required:
-        - name
-        - photoUrls
-      type: object
-      properties:
-        id:
-          type: integer
-          format: int64
-        category:
-          $ref: '#/components/schemas/Category'
-        name:
-          type: string
-          example: doggie
-        photoUrls:
-          type: array
-          xml:
-            name: photoUrl
-            wrapped: true
-          items:
-            type: string
-        tags:
-          type: array
-          xml:
-            name: tag
-            wrapped: true
-          items:
-            $ref: '#/components/schemas/Tag'
-        status:
-          type: string
-          description: pet status in the store
-          enum:
-            - available
-            - pending
-            - sold
-        profileImage:
-          type: string
-          format: binary
-      xml:
-        name: Pet
-    ApiResponse:
-      type: object
-      properties:
-        code:
-          type: integer
-          format: int32
-        type:
-          type: string
-        message:
-          type: string
-  securitySchemes:
-    petstore_auth:
-      type: oauth2
-      flows:
-        implicit:
-          authorizationUrl: http://petstore.swagger.io/oauth/dialog
-          scopes:
-            write:pets: modify pets in your account
-            read:pets: read your pets
-    api_key:
-      type: apiKey
-      name: api_key
-      in: header