Generate Angular proxies with responseType and Accept from ContentTypes

Refs abpframework/abp#23732

npm/ng-packs/packages/schematics/src/commands/api/files-service/proxy/__namespace@dir__/__name@kebab__.service.ts.template

@@ -11,15 +11,17 @@ export class <%= name %>Service {
   <%
     const isBlob = body.isBlobMethod() ;
     const responseType =  isBlob ? "Blob":body.responseType;
+    const httpResponseType = body.httpResponseType;
+    const acceptHeader = body.acceptHeader;
   %>
 
   <%= camel(signature.name) %> = (<%= serializeParameters(signature.parameters) %>) =>
     this.restService.request<<%= body.requestType %>, <%= responseType %>>({
       method: '<%= body.method %>',<%
-      if (body.responseType === 'string') { %>
-      responseType: 'text',<% } %><%
-      if (isBlob) { %>
-      responseType: 'blob',<% } %>
+      if (httpResponseType && httpResponseType !== 'json') { %>
+      responseType: '<%= httpResponseType %>',<% } %><%
+      if (acceptHeader) { %>
+      headers: { Accept: '<%= acceptHeader %>' },<% } %>
       url: <%= body.url %>,<%
       if (body.dictParamVar && !body.params.length) { %>
       params: <%= body.dictParamVar %>,<% } %><%

npm/ng-packs/packages/schematics/src/models/api-definition.ts

@@ -68,7 +68,7 @@ export interface Action {
   supportedVersions: string[];
   parametersOnMethod: ParameterInSignature[];
   parameters: ParameterInBody[];
-  returnValue: TypeDef;
+  returnValue: ReturnValueDef;
 }
 
 export interface ParameterInSignature {
@@ -100,6 +100,11 @@ export interface TypeDef {
   typeSimple: string;
 }
 
+export interface ReturnValueDef extends TypeDef {
+  contentTypes?: string[];
+  isRemoteStream?: boolean;
+}
+
 export interface TypeWithEnum {
   isEnum: boolean;
   type: string;

npm/ng-packs/packages/schematics/src/models/method.ts

@@ -45,6 +45,8 @@ export class Body {
   responseTypeWithNamespace: string;
   requestType = 'any';
   responseType: string;
+  httpResponseType?: 'json' | 'text' | 'blob' | 'arraybuffer';
+  acceptHeader?: string;
   url: string;
 
   registerActionParameter = (param: ParameterInBody) => {

npm/ng-packs/packages/schematics/src/tests/action-to-body-mapper.spec.ts

@@ -0,0 +1,543 @@
+import { readFileSync } from 'fs';
+import { join } from 'path';
+import { describe, expect, test } from 'vitest';
+import { eBindingSourceId } from '../enums';
+import { Action } from '../models';
+import { createActionToBodyMapper } from '../utils/service';
+
+const TEMPLATE_PATH = join(
+  __dirname,
+  '..',
+  'commands',
+  'api',
+  'files-service',
+  'proxy',
+  '__namespace@dir__',
+  '__name@kebab__.service.ts.template',
+);
+
+function buildAction(overrides: Partial<Action>): Action {
+  return {
+    uniqueName: 'GetStatusAsync',
+    name: 'GetStatus',
+    httpMethod: 'GET',
+    url: 'api/app/test-service/status',
+    supportedVersions: [],
+    parametersOnMethod: [],
+    parameters: [],
+    returnValue: { type: 'System.String', typeSimple: 'string' },
+    ...overrides,
+  } as Action;
+}
+
+describe('createActionToBodyMapper — string return value', () => {
+  const mapBody = createActionToBodyMapper();
+
+  test('without contentTypes falls back to text mode (legacy behavior)', () => {
+    const body = mapBody(buildAction({}));
+
+    expect(body.responseType).toBe('string');
+    expect(body.httpResponseType).toBe('text');
+    expect(body.acceptHeader).toBeUndefined();
+  });
+
+  test('with contentTypes containing application/json picks json + Accept: application/json', () => {
+    const body = mapBody(
+      buildAction({
+        returnValue: {
+          type: 'System.String',
+          typeSimple: 'string',
+          contentTypes: ['application/json', 'text/plain'],
+        },
+      } as Partial<Action>),
+    );
+
+    expect(body.httpResponseType).toBe('json');
+    expect(body.acceptHeader).toBe('application/json');
+  });
+
+  test('with only text/* contentTypes picks text + Accept: text/plain', () => {
+    const body = mapBody(
+      buildAction({
+        returnValue: {
+          type: 'System.String',
+          typeSimple: 'string',
+          contentTypes: ['text/plain', 'text/csv'],
+        },
+      } as Partial<Action>),
+    );
+
+    expect(body.httpResponseType).toBe('text');
+    expect(body.acceptHeader).toBe('text/plain');
+  });
+});
+
+describe('createActionToBodyMapper — IRemoteStreamContent return value', () => {
+  const mapBody = createActionToBodyMapper();
+
+  test('always picks blob + Accept: application/octet-stream regardless of contentTypes', () => {
+    const body = mapBody(
+      buildAction({
+        returnValue: {
+          type: 'Volo.Abp.Content.IRemoteStreamContent',
+          typeSimple: 'Volo.Abp.Content.IRemoteStreamContent',
+        },
+      } as Partial<Action>),
+    );
+
+    expect(body.httpResponseType).toBe('blob');
+    expect(body.acceptHeader).toBe('application/octet-stream');
+    expect(body.isBlobMethod()).toBe(true);
+  });
+
+  test('binary-only contentTypes also picks blob + octet-stream', () => {
+    const body = mapBody(
+      buildAction({
+        returnValue: {
+          type: 'System.Byte[]',
+          typeSimple: 'byte[]',
+          contentTypes: ['application/pdf'],
+        },
+      } as Partial<Action>),
+    );
+
+    expect(body.httpResponseType).toBe('blob');
+    expect(body.acceptHeader).toBe('application/octet-stream');
+  });
+});
+
+describe('createActionToBodyMapper — other return values', () => {
+  const mapBody = createActionToBodyMapper();
+
+  test('object return without contentTypes has no httpResponseType / acceptHeader (defaults to json)', () => {
+    const body = mapBody(
+      buildAction({
+        returnValue: { type: 'My.Project.UserDto', typeSimple: 'My.Project.UserDto' },
+      } as Partial<Action>),
+    );
+
+    expect(body.httpResponseType).toBeUndefined();
+    expect(body.acceptHeader).toBeUndefined();
+  });
+
+  test('void return has no httpResponseType / acceptHeader', () => {
+    const body = mapBody(
+      buildAction({
+        returnValue: { type: 'System.Void', typeSimple: 'void' },
+      } as Partial<Action>),
+    );
+
+    expect(body.httpResponseType).toBeUndefined();
+    expect(body.acceptHeader).toBeUndefined();
+  });
+
+  test('registers a query parameter via the binding source', () => {
+    const body = mapBody(
+      buildAction({
+        parameters: [
+          {
+            nameOnMethod: 'id',
+            name: 'id',
+            jsonName: null,
+            type: 'System.Guid',
+            typeSimple: 'string',
+            isOptional: false,
+            defaultValue: null,
+            constraintTypes: null,
+            bindingSourceId: eBindingSourceId.Query,
+            descriptorName: '',
+          },
+        ],
+      }),
+    );
+
+    expect(body.params).toEqual(['id']);
+  });
+});
+
+describe('createActionToBodyMapper — IsRemoteStream backend flag', () => {
+  const mapBody = createActionToBodyMapper();
+
+  test('isRemoteStream=true forces blob even if Type is a custom subclass name', () => {
+    const body = mapBody(
+      buildAction({
+        returnValue: {
+          type: 'My.Project.CustomStreamContent',
+          typeSimple: 'My.Project.CustomStreamContent',
+          isRemoteStream: true,
+          contentTypes: ['text/plain', 'application/json'],
+        },
+      } as Partial<Action>),
+    );
+
+    expect(body.httpResponseType).toBe('blob');
+    expect(body.acceptHeader).toBe('application/octet-stream');
+  });
+
+  test('isRemoteStream=false with stream-content type-name still detected by type name (legacy)', () => {
+    const body = mapBody(
+      buildAction({
+        returnValue: {
+          type: 'Volo.Abp.Content.IRemoteStreamContent',
+          typeSimple: 'Volo.Abp.Content.IRemoteStreamContent',
+        },
+      } as Partial<Action>),
+    );
+
+    expect(body.httpResponseType).toBe('blob');
+    expect(body.acceptHeader).toBe('application/octet-stream');
+  });
+});
+
+describe('createActionToBodyMapper — +json suffix detection', () => {
+  const mapBody = createActionToBodyMapper();
+
+  test('application/problem+json picked as json', () => {
+    const body = mapBody(
+      buildAction({
+        returnValue: {
+          type: 'System.String',
+          typeSimple: 'string',
+          contentTypes: ['application/problem+json'],
+        },
+      } as Partial<Action>),
+    );
+
+    expect(body.httpResponseType).toBe('json');
+    expect(body.acceptHeader).toBe('application/json');
+  });
+
+  test('text/json picked as json (informal but real-world)', () => {
+    const body = mapBody(
+      buildAction({
+        returnValue: {
+          type: 'System.String',
+          typeSimple: 'string',
+          contentTypes: ['text/json'],
+        },
+      } as Partial<Action>),
+    );
+
+    expect(body.httpResponseType).toBe('json');
+    expect(body.acceptHeader).toBe('application/json');
+  });
+
+  test('application/vnd.api+json picked as json', () => {
+    const body = mapBody(
+      buildAction({
+        returnValue: {
+          type: 'System.String',
+          typeSimple: 'string',
+          contentTypes: ['application/vnd.api+json'],
+        },
+      } as Partial<Action>),
+    );
+
+    expect(body.httpResponseType).toBe('json');
+  });
+});
+
+describe('createActionToBodyMapper — expanded binary whitelist', () => {
+  const mapBody = createActionToBodyMapper();
+
+  test.each([
+    ['application/wasm'],
+    ['font/woff2'],
+    ['application/vnd.openxmlformats-officedocument.wordprocessingml.document'],
+    ['application/vnd.ms-excel'],
+    ['application/vnd.oasis.opendocument.spreadsheet'],
+    ['application/x-msdownload'],
+    ['application/rtf'],
+    ['application/x-rar-compressed'],
+    ['application/x-bzip2'],
+    ['application/x-iso9660-image'],
+    ['application/java-archive'],
+    ['application/epub+zip'],
+    ['model/gltf-binary'],
+  ])('"%s" picked as blob', mediaType => {
+    const body = mapBody(
+      buildAction({
+        returnValue: {
+          type: 'System.Byte[]',
+          typeSimple: 'byte[]',
+          contentTypes: [mediaType],
+        },
+      } as Partial<Action>),
+    );
+
+    expect(body.httpResponseType).toBe('blob');
+  });
+});
+
+describe('createActionToBodyMapper — contentTypes precedence and edge cases', () => {
+  const mapBody = createActionToBodyMapper();
+
+  test('isBlobMethod() type detection wins over json in contentTypes', () => {
+    const body = mapBody(
+      buildAction({
+        returnValue: {
+          type: 'Volo.Abp.Content.RemoteStreamContent',
+          typeSimple: 'Volo.Abp.Content.RemoteStreamContent',
+          contentTypes: ['application/json', 'text/plain'],
+        },
+      } as Partial<Action>),
+    );
+
+    expect(body.httpResponseType).toBe('blob');
+    expect(body.acceptHeader).toBe('application/octet-stream');
+  });
+
+  test('IRemoteStreamContent[] array also picked as blob', () => {
+    const body = mapBody(
+      buildAction({
+        returnValue: {
+          type: 'Volo.Abp.Content.IRemoteStreamContent[]',
+          typeSimple: 'Volo.Abp.Content.IRemoteStreamContent[]',
+        },
+      } as Partial<Action>),
+    );
+
+    expect(body.httpResponseType).toBe('blob');
+    expect(body.acceptHeader).toBe('application/octet-stream');
+  });
+
+  test('case-insensitive json detection (APPLICATION/JSON)', () => {
+    const body = mapBody(
+      buildAction({
+        returnValue: {
+          type: 'System.String',
+          typeSimple: 'string',
+          contentTypes: ['APPLICATION/JSON'],
+        },
+      } as Partial<Action>),
+    );
+
+    expect(body.httpResponseType).toBe('json');
+    expect(body.acceptHeader).toBe('application/json');
+  });
+
+  test('image/* contentTypes alone picks blob', () => {
+    const body = mapBody(
+      buildAction({
+        returnValue: {
+          type: 'System.Byte[]',
+          typeSimple: 'byte[]',
+          contentTypes: ['image/png', 'image/jpeg'],
+        },
+      } as Partial<Action>),
+    );
+
+    expect(body.httpResponseType).toBe('blob');
+    expect(body.acceptHeader).toBe('application/octet-stream');
+  });
+
+  test('video/* and audio/* picked as blob', () => {
+    const body = mapBody(
+      buildAction({
+        returnValue: {
+          type: 'System.Byte[]',
+          typeSimple: 'byte[]',
+          contentTypes: ['video/mp4', 'audio/mpeg'],
+        },
+      } as Partial<Action>),
+    );
+
+    expect(body.httpResponseType).toBe('blob');
+  });
+
+  test('application/pdf contentTypes picked as blob', () => {
+    const body = mapBody(
+      buildAction({
+        returnValue: {
+          type: 'System.Byte[]',
+          typeSimple: 'byte[]',
+          contentTypes: ['application/pdf'],
+        },
+      } as Partial<Action>),
+    );
+
+    expect(body.httpResponseType).toBe('blob');
+  });
+
+  test('empty contentTypes falls through to legacy string→text behavior', () => {
+    const body = mapBody(
+      buildAction({
+        returnValue: { type: 'System.String', typeSimple: 'string', contentTypes: [] },
+      } as Partial<Action>),
+    );
+
+    expect(body.httpResponseType).toBe('text');
+    expect(body.acceptHeader).toBeUndefined();
+  });
+
+  test('mixed text/* and application/json picks json', () => {
+    const body = mapBody(
+      buildAction({
+        returnValue: {
+          type: 'System.String',
+          typeSimple: 'string',
+          contentTypes: ['text/json', 'text/plain', 'application/json'],
+        },
+      } as Partial<Action>),
+    );
+
+    expect(body.httpResponseType).toBe('json');
+    expect(body.acceptHeader).toBe('application/json');
+  });
+
+  test('contentTypes with json-suffix variants still picks json', () => {
+    const body = mapBody(
+      buildAction({
+        returnValue: {
+          type: 'System.String',
+          typeSimple: 'string',
+          contentTypes: ['application/json; charset=utf-8'],
+        },
+      } as Partial<Action>),
+    );
+
+    expect(body.httpResponseType).toBe('json');
+  });
+
+  test('non-string non-blob type with contentTypes containing json defaults appropriately', () => {
+    const body = mapBody(
+      buildAction({
+        returnValue: {
+          type: 'My.Project.UserDto',
+          typeSimple: 'My.Project.UserDto',
+          contentTypes: ['application/json'],
+        },
+      } as Partial<Action>),
+    );
+
+    expect(body.httpResponseType).toBe('json');
+    expect(body.acceptHeader).toBe('application/json');
+  });
+
+  test('json contentType with charset parameter is normalized', () => {
+    const body = mapBody(
+      buildAction({
+        returnValue: {
+          type: 'System.String',
+          typeSimple: 'string',
+          contentTypes: ['application/json; charset=utf-8'],
+        },
+      } as Partial<Action>),
+    );
+
+    expect(body.httpResponseType).toBe('json');
+    expect(body.acceptHeader).toBe('application/json');
+  });
+
+  test('text contentType with charset parameter is normalized', () => {
+    const body = mapBody(
+      buildAction({
+        returnValue: {
+          type: 'System.String',
+          typeSimple: 'string',
+          contentTypes: ['text/plain ; charset=utf-8 '],
+        },
+      } as Partial<Action>),
+    );
+
+    expect(body.httpResponseType).toBe('text');
+    expect(body.acceptHeader).toBe('text/plain');
+  });
+
+  test('mixed text/plain (with charset) and application/json picks json after normalize', () => {
+    const body = mapBody(
+      buildAction({
+        returnValue: {
+          type: 'System.String',
+          typeSimple: 'string',
+          contentTypes: ['text/plain; charset=utf-8', 'application/json; charset=utf-8'],
+        },
+      } as Partial<Action>),
+    );
+
+    expect(body.httpResponseType).toBe('json');
+  });
+
+  test('text/csv only (custom text format) picks text', () => {
+    const body = mapBody(
+      buildAction({
+        returnValue: {
+          type: 'System.String',
+          typeSimple: 'string',
+          contentTypes: ['text/csv'],
+        },
+      } as Partial<Action>),
+    );
+
+    expect(body.httpResponseType).toBe('text');
+    expect(body.acceptHeader).toBe('text/plain');
+  });
+});
+
+describe('createActionToBodyMapper — backward compatibility', () => {
+  const mapBody = createActionToBodyMapper();
+
+  test('legacy api-definition without contentTypes works (string)', () => {
+    const body = mapBody(
+      buildAction({
+        returnValue: { type: 'System.String', typeSimple: 'string' } as Partial<Action>['returnValue'],
+      } as Partial<Action>),
+    );
+
+    expect(body.httpResponseType).toBe('text');
+    expect(body.acceptHeader).toBeUndefined();
+  });
+
+  test('legacy api-definition without contentTypes works (IRemoteStreamContent)', () => {
+    const body = mapBody(
+      buildAction({
+        returnValue: {
+          type: 'Volo.Abp.Content.IRemoteStreamContent',
+          typeSimple: 'Volo.Abp.Content.IRemoteStreamContent',
+        },
+      } as Partial<Action>),
+    );
+
+    expect(body.httpResponseType).toBe('blob');
+    expect(body.acceptHeader).toBe('application/octet-stream');
+  });
+
+  test('legacy api-definition without contentTypes works (object)', () => {
+    const body = mapBody(
+      buildAction({
+        returnValue: { type: 'My.Project.UserDto', typeSimple: 'My.Project.UserDto' },
+      } as Partial<Action>),
+    );
+
+    expect(body.httpResponseType).toBeUndefined();
+    expect(body.acceptHeader).toBeUndefined();
+  });
+
+  test('void / no return preserves legacy behavior', () => {
+    const body = mapBody(
+      buildAction({
+        returnValue: { type: 'System.Void', typeSimple: 'void' },
+      } as Partial<Action>),
+    );
+
+    expect(body.httpResponseType).toBeUndefined();
+    expect(body.acceptHeader).toBeUndefined();
+  });
+});
+
+describe('proxy service template emission', () => {
+  const template = readFileSync(TEMPLATE_PATH, 'utf8');
+
+  test('reads body.httpResponseType and body.acceptHeader from body', () => {
+    expect(template).toContain('body.httpResponseType');
+    expect(template).toContain('body.acceptHeader');
+  });
+
+  test('emits Accept header conditional', () => {
+    expect(template).toMatch(/headers:\s*\{\s*Accept:/);
+  });
+
+  test('emits responseType only for non-json httpResponseType', () => {
+    expect(template).toMatch(/httpResponseType\s*&&\s*httpResponseType\s*!==\s*'json'/);
+  });
+});

npm/ng-packs/packages/schematics/src/tests/proxy-service-template-render.spec.ts

@@ -0,0 +1,179 @@
+import { readFileSync } from 'fs';
+import { join } from 'path';
+import { template as lodashTemplate } from 'lodash';
+import { describe, expect, test } from 'vitest';
+
+/**
+ * Smoke test that actually renders the proxy `.service.ts.template` against
+ * representative body configurations and asserts the emitted code matches
+ * what the runtime contract requires.
+ *
+ * This catches template-syntax / control-flow regressions that a string
+ * `toContain` check on the template source would silently let through.
+ */
+
+const TEMPLATE_PATH = join(
+  __dirname,
+  '..',
+  'commands',
+  'api',
+  'files-service',
+  'proxy',
+  '__namespace@dir__',
+  '__name@kebab__.service.ts.template',
+);
+
+const TEMPLATE_SRC = readFileSync(TEMPLATE_PATH, 'utf8');
+
+function render(context: Record<string, unknown>): string {
+  const compiled = lodashTemplate(TEMPLATE_SRC, {
+    imports: {
+      camel: (s: string) => s.charAt(0).toLowerCase() + s.slice(1),
+      serializeParameters: (params: Array<{ name: string; type: string; default?: string }>) =>
+        params.map(p => `${p.name}: ${p.type}`).join(', '),
+    },
+  });
+  return compiled(context);
+}
+
+function buildContext(body: Partial<MockBody>) {
+  return {
+    apiName: 'Default',
+    name: 'Sample',
+    namespace: 'app',
+    imports: [
+      { keyword: 'import', specifiers: ['RestService', 'Rest'], path: '@abp/ng.core' },
+      { keyword: 'import', specifiers: ['Injectable', 'inject'], path: '@angular/core' },
+    ],
+    methods: [
+      {
+        body: makeBody(body),
+        signature: {
+          name: 'GetSampleAsync',
+          parameters: [],
+        },
+      },
+    ],
+  };
+}
+
+interface MockBody {
+  method: string;
+  url: string;
+  responseType: string;
+  responseTypeWithNamespace: string;
+  httpResponseType?: string;
+  acceptHeader?: string;
+  body?: string;
+  params: string[];
+  dictParamVar?: string;
+  requestType: string;
+  isBlobMethod(): boolean;
+}
+
+function makeBody(overrides: Partial<MockBody>): MockBody {
+  return {
+    method: 'GET',
+    url: "'/api/sample'",
+    responseType: 'any',
+    responseTypeWithNamespace: 'any',
+    httpResponseType: undefined,
+    acceptHeader: undefined,
+    body: undefined,
+    params: [],
+    dictParamVar: undefined,
+    requestType: 'any',
+    isBlobMethod: () => false,
+    ...overrides,
+  };
+}
+
+describe('proxy service template — rendered output', () => {
+  test('default JSON body emits no responseType and no Accept header', () => {
+    const output = render(buildContext({
+      responseType: 'MyDto',
+      responseTypeWithNamespace: 'My.Project.MyDto',
+    }));
+
+    expect(output).toContain("method: 'GET'");
+    expect(output).not.toContain('responseType:');
+    expect(output).not.toContain('headers:');
+  });
+
+  test('json httpResponseType emits Accept but no responseType (default is json)', () => {
+    const output = render(buildContext({
+      responseType: 'string',
+      responseTypeWithNamespace: 'string',
+      httpResponseType: 'json',
+      acceptHeader: 'application/json',
+    }));
+
+    expect(output).toContain("headers: { Accept: 'application/json' }");
+    expect(output).not.toContain('responseType:');
+  });
+
+  test('text httpResponseType emits both responseType and Accept', () => {
+    const output = render(buildContext({
+      responseType: 'string',
+      responseTypeWithNamespace: 'string',
+      httpResponseType: 'text',
+      acceptHeader: 'text/plain',
+    }));
+
+    expect(output).toContain("responseType: 'text'");
+    expect(output).toContain("headers: { Accept: 'text/plain' }");
+  });
+
+  test('blob (IRemoteStreamContent) emits Blob return type + responseType + Accept', () => {
+    const output = render(buildContext({
+      responseType: 'Volo.Abp.Content.IRemoteStreamContent',
+      responseTypeWithNamespace: 'Volo.Abp.Content.IRemoteStreamContent',
+      isBlobMethod: () => true,
+      httpResponseType: 'blob',
+      acceptHeader: 'application/octet-stream',
+    }));
+
+    expect(output).toContain("responseType: 'blob'");
+    expect(output).toContain('Blob>');
+    expect(output).toContain("headers: { Accept: 'application/octet-stream' }");
+  });
+
+  test('arraybuffer httpResponseType emits responseType', () => {
+    const output = render(buildContext({
+      responseType: 'ArrayBuffer',
+      responseTypeWithNamespace: 'ArrayBuffer',
+      httpResponseType: 'arraybuffer',
+      acceptHeader: 'application/octet-stream',
+    }));
+
+    expect(output).toContain("responseType: 'arraybuffer'");
+    expect(output).toContain("headers: { Accept: 'application/octet-stream' }");
+  });
+
+  test('no acceptHeader → no headers line', () => {
+    const output = render(buildContext({
+      responseType: 'string',
+      responseTypeWithNamespace: 'string',
+      httpResponseType: 'text',
+      acceptHeader: undefined,
+    }));
+
+    expect(output).toContain("responseType: 'text'");
+    expect(output).not.toContain('headers:');
+  });
+
+  test('rendered service code is valid TypeScript-shaped (closing braces / semicolons)', () => {
+    const output = render(buildContext({
+      responseType: 'string',
+      responseTypeWithNamespace: 'string',
+      httpResponseType: 'json',
+      acceptHeader: 'application/json',
+    }));
+
+    expect(output).toContain('@Injectable({');
+    expect(output).toContain('providedIn: \'root\'');
+    expect(output).toContain('export class SampleService');
+    expect(output).toContain('this.restService.request<any,');
+    expect(output.match(/}/g)!.length).toBeGreaterThanOrEqual(3);
+  });
+});

npm/ng-packs/packages/schematics/src/utils/service.ts

@@ -97,7 +97,20 @@ export function createActionToBodyMapper() {
       }
     }
     const responseTypeWithNamespace = returnValue.typeSimple;
-    const body = new Body({ method: httpMethod, responseType, url, responseTypeWithNamespace });
+    const { httpResponseType, acceptHeader } = resolveHttpResponseAndAccept(
+      responseType,
+      responseTypeWithNamespace,
+      returnValue.contentTypes,
+      returnValue.isRemoteStream,
+    );
+    const body = new Body({
+      method: httpMethod,
+      responseType,
+      url,
+      responseTypeWithNamespace,
+      httpResponseType,
+      acceptHeader,
+    });
 
     parameters.forEach(body.registerActionParameter);
 
@@ -105,6 +118,94 @@ export function createActionToBodyMapper() {
   };
 }
 
+function normalizeMediaType(mediaType: string): string {
+  const semi = mediaType.indexOf(';');
+  return (semi < 0 ? mediaType : mediaType.slice(0, semi)).trim().toLowerCase();
+}
+
+function isJsonMediaType(normalized: string): boolean {
+  return normalized === 'application/json' || normalized === 'text/json' || normalized.endsWith('+json');
+}
+
+function isBinaryMediaType(mediaType: string): boolean {
+  const m = normalizeMediaType(mediaType);
+  if (
+    m === 'application/octet-stream' ||
+    m === 'application/pdf' ||
+    m === 'application/zip' ||
+    m === 'application/x-zip-compressed' ||
+    m === 'application/gzip' ||
+    m === 'application/x-tar' ||
+    m === 'application/x-7z-compressed' ||
+    m === 'application/wasm' ||
+    m === 'application/x-msdownload' ||
+    m === 'application/x-msdos-program' ||
+    m === 'application/rtf' ||
+    m === 'application/x-rar-compressed' ||
+    m === 'application/x-rar' ||
+    m === 'application/x-bzip2' ||
+    m === 'application/x-iso9660-image' ||
+    m === 'application/x-apple-diskimage' ||
+    m === 'application/java-archive' ||
+    m === 'application/epub+zip' ||
+    m === 'model/gltf-binary'
+  ) {
+    return true;
+  }
+  if (m.startsWith('image/') || m.startsWith('video/') || m.startsWith('audio/') || m.startsWith('font/')) {
+    return true;
+  }
+  // Office / OpenDocument / generic vnd.* (excluding +json / +xml which are structured text)
+  if (
+    m.startsWith('application/vnd.openxmlformats-') ||
+    m.startsWith('application/vnd.ms-') ||
+    m.startsWith('application/vnd.oasis.opendocument.')
+  ) {
+    return true;
+  }
+  if (m.startsWith('application/vnd.') && !m.endsWith('+json') && !m.endsWith('+xml')) {
+    return true;
+  }
+  return false;
+}
+
+function resolveHttpResponseAndAccept(
+  responseType: string,
+  responseTypeWithNamespace: string,
+  contentTypes: string[] | undefined,
+  isRemoteStreamFlag: boolean | undefined,
+): { httpResponseType?: 'json' | 'text' | 'blob' | 'arraybuffer'; acceptHeader?: string } {
+  if (
+    isRemoteStreamFlag ||
+    isRemoteStreamContent(responseTypeWithNamespace) ||
+    isRemoteStreamContentArray(responseTypeWithNamespace)
+  ) {
+    return { httpResponseType: 'blob', acceptHeader: 'application/octet-stream' };
+  }
+
+  if (contentTypes && contentTypes.length > 0) {
+    const normalized = contentTypes.map(normalizeMediaType);
+
+    if (normalized.some(isJsonMediaType)) {
+      return { httpResponseType: 'json', acceptHeader: 'application/json' };
+    }
+
+    if (normalized.every(ct => ct.startsWith('text/'))) {
+      return { httpResponseType: 'text', acceptHeader: 'text/plain' };
+    }
+
+    if (normalized.every(isBinaryMediaType)) {
+      return { httpResponseType: 'blob', acceptHeader: 'application/octet-stream' };
+    }
+  }
+
+  if (responseType === 'string') {
+    return { httpResponseType: 'text' };
+  }
+
+  return {};
+}
+
 export function createActionToSignatureMapper() {
   const adaptType = createTypeAdapter();