feat: add parsedMethods option to parse only the passed ones

README.md

@@ -92,6 +92,8 @@ app.use((ctx) => {
 
 - **enableRawChecking**: support the already parsed body on the raw request by override and prioritize the parsed value over the sended payload. (default is `false`)
 
+- **parsedMethods**: declares the HTTP methods where bodies will be parsed, default `['POST', 'PUT', 'PATCH']`.
+
 - **disableBodyParser**: you can dynamic disable body parser by set `ctx.disableBodyParser = true`.
 
   ```js

src/body-parser.ts

@@ -26,12 +26,13 @@ declare module 'http' {
  */
 export function bodyParserWrapper(opts: BodyParserOptions = {}) {
   const {
+    patchNode = false,
+    parsedMethods = ['POST', 'PUT', 'PATCH'],
     detectJSON,
     onError,
     enableTypes = ['json', 'form'],
     extendTypes = {} as NonNullable<BodyParserOptions['extendTypes']>,
     enableRawChecking = false,
-    patchNode = false,
     ...restOpts
   } = opts;
   const isEnabledBodyAs = getIsEnabledBodyAs(enableTypes);
@@ -69,8 +70,13 @@ export function bodyParserWrapper(opts: BodyParserOptions = {}) {
 
   return async function (ctx: Koa.Context, next: Koa.Next) {
     if (
+      // method souldn't be parsed
+      !parsedMethods.includes(ctx.method.toUpperCase()) ||
+      // patchNode enabled and raw request already parsed
       (patchNode && ctx.req.body !== undefined) ||
+      // koa request body already parsed
       ctx.request.body !== undefined ||
+      // bodyparser disabled
       ctx.disableBodyParser
     )
       return next();

src/body-parser.types.ts

@@ -7,9 +7,17 @@ import type * as Koa from 'koa';
 export const supportedBodyTypes = ['json', 'form', 'text', 'xml'] as const;
 export type BodyType = (typeof supportedBodyTypes)[number];
 
+/**
+ * BodyParser Options
+ */
 export type BodyParserOptions = {
   /**
-   * Patch request body to Node's 'ctx.req'
+   * declares the HTTP methods where bodies will be parsed.
+   * @default ['POST', 'PUT', 'PATCH']
+   */
+  parsedMethods?: string[];
+  /**
+   * patch request body to Node's 'ctx.req'
    * @default false
    */
   patchNode?: boolean;