enabled request validation

client/simpleform/index.html

@@ -1,4 +1,16 @@
 <form action="/screenshots" method="POST" target="_blank">
-<input type="text" name="a">
+  <table>
-<input type="text" name="b"><input type="submit">
+    <tr>
+      <td>URL</td>
+      <td><input type="text" name="pageUrl"></td>
+    </tr>
+    <tr>
+      <td>Type</td>
+      <td><input type="text" name="imageType" value="png"></td>
+    </tr>
+    <tr>
+      <td>&nbsp;</td>
+      <td><input type="submit"></td>
+    </tr>
+  </table>
 </form>

package-lock.json

@@ -16,6 +16,7 @@
         "@nestjs/platform-express": "^9.0.0",
         "@nestjs/serve-static": "^3.0.0",
         "@nestjs/swagger": "^6.0.1",
+        "class-transformer": "^0.5.1",
         "class-validator": "^0.13.2",
         "puppeteer": "^15.3.2",
         "reflect-metadata": "^0.1.13",
@@ -3184,6 +3185,11 @@
       "integrity": "sha512-cOU9usZw8/dXIXKtwa8pM0OTJQuJkxMN6w30csNRUerHfeQ5R6U3kkU/FtJeIf3M202OHfY2U8ccInBG7/xogA==",
       "dev": true
     },
+    "node_modules/class-transformer": {
+      "version": "0.5.1",
+      "resolved": "https://registry.npmjs.org/class-transformer/-/class-transformer-0.5.1.tgz",
+      "integrity": "sha512-SQa1Ws6hUbfC98vKGxZH3KFY0Y1lm5Zm0SY8XX9zbK7FJCyVEac3ATW0RIpwzW+oOfmHE5PMPufDG9hCfoEOMw=="
+    },
     "node_modules/class-validator": {
       "version": "0.13.2",
       "resolved": "https://registry.npmjs.org/class-validator/-/class-validator-0.13.2.tgz",
@@ -11399,6 +11405,11 @@
       "integrity": "sha512-cOU9usZw8/dXIXKtwa8pM0OTJQuJkxMN6w30csNRUerHfeQ5R6U3kkU/FtJeIf3M202OHfY2U8ccInBG7/xogA==",
       "dev": true
     },
+    "class-transformer": {
+      "version": "0.5.1",
+      "resolved": "https://registry.npmjs.org/class-transformer/-/class-transformer-0.5.1.tgz",
+      "integrity": "sha512-SQa1Ws6hUbfC98vKGxZH3KFY0Y1lm5Zm0SY8XX9zbK7FJCyVEac3ATW0RIpwzW+oOfmHE5PMPufDG9hCfoEOMw=="
+    },
     "class-validator": {
       "version": "0.13.2",
       "resolved": "https://registry.npmjs.org/class-validator/-/class-validator-0.13.2.tgz",

package.json

@@ -28,6 +28,7 @@
     "@nestjs/platform-express": "^9.0.0",
     "@nestjs/serve-static": "^3.0.0",
     "@nestjs/swagger": "^6.0.1",
+    "class-transformer": "^0.5.1",
     "class-validator": "^0.13.2",
     "puppeteer": "^15.3.2",
     "reflect-metadata": "^0.1.13",

src/main.ts

@@ -1,9 +1,11 @@
+import { ValidationPipe } from '@nestjs/common';
 import { NestFactory } from '@nestjs/core';
 import { SwaggerModule, DocumentBuilder } from '@nestjs/swagger';
 import { AppModule } from './app.module';
 
 async function bootstrap() {
   const app = await NestFactory.create(AppModule);
+  app.useGlobalPipes(new ValidationPipe({ transform: true }));
 
   const config = new DocumentBuilder().build();
   const document = SwaggerModule.createDocument(app, config);

src/screenshots/screenshots.dto.ts

@@ -1,4 +1,4 @@
-import { IsEnum, IsString, IsUrl } from "class-validator";
+import { IsEnum, IsNotEmpty, IsString, IsUrl } from "class-validator";
 
 enum ImageTypeDto {
   Jpeg = 'jpeg',