Merge pull request #41 from unDemian/master

Add onError handler

README.md

@@ -84,6 +84,7 @@ console.log('curl -i http://localhost:3131/users -d "name=test"');
 - `text` **{Boolean}** Parse text bodies, default `true`
 - `json` **{Boolean}** Parse json bodies, default `true`
 - `formidable` **{Object}** Options to pass to the formidable multipart parser
+- `onError` **{Function}** Custom error handle, if throw an error, you can customize the response - onError(error, context), default will throw
 - `strict` **{Boolean}** If enabled, don't parse GET, HEAD, DELETE requests, default `true`
 
 ## A note about strict mode

index.js

@@ -31,6 +31,7 @@ module.exports = requestbody;
  */
 function requestbody(opts) {
   opts = opts || {};
+  opts.onError = 'onError' in opts ? opts.onError : false;
   opts.patchNode = 'patchNode' in opts ? opts.patchNode : false;
   opts.patchKoa  = 'patchKoa'  in opts ? opts.patchKoa  : true;
   opts.multipart = 'multipart' in opts ? opts.multipart : false;
@@ -48,17 +49,26 @@ function requestbody(opts) {
     var body = {};
     // so don't parse the body in strict mode
     if (!opts.strict || ["GET", "HEAD", "DELETE"].indexOf(this.method.toUpperCase()) === -1) {
-      if (opts.json && this.is('json'))  {
-        body = yield buddy.json(this, {encoding: opts.encoding, limit: opts.jsonLimit});
-      }
-      else if (opts.urlencoded && this.is('urlencoded')) {
-        body = yield buddy.form(this, {encoding: opts.encoding, limit: opts.formLimit});
-      }
-      else if (opts.text && this.is('text')) {
-        body = yield buddy.text(this, {encoding: opts.encoding, limit: opts.textLimit});
-      }
-      else if (opts.multipart && this.is('multipart')) {
-        body = yield formy(this, opts.formidable);
+      try {
+        if (opts.json && this.is('json'))  {
+          body = yield buddy.json(this, {encoding: opts.encoding, limit: opts.jsonLimit});
+        }
+        else if (opts.urlencoded && this.is('urlencoded')) {
+          body = yield buddy.form(this, {encoding: opts.encoding, limit: opts.formLimit});
+        }
+        else if (opts.text && this.is('text')) {
+          body = yield buddy.text(this, {encoding: opts.encoding, limit: opts.textLimit});
+        }
+        else if (opts.multipart && this.is('multipart')) {
+          body = yield formy(this, opts.formidable);
+        }
+
+      } catch(parsingError) {
+        if (typeof(opts.onError) === 'function') {
+          opts.onError(parsingError, this);
+        } else {
+          throw parsingError;
+        }
       }
     }
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "koa-body",
-  "version": "1.5.0",
+  "version": "1.6.0",
   "description": "A koa body parser middleware. Support multipart, urlencoded and json request bodies.",
   "main": "index.js",
   "scripts": {