Add independent maxBodyLength option (#2781)

* Add independent option to set the maximum size of the request body

* Remove maxBodyLength check

* Update README

* Assert for error code and message

lib/adapters/http.js

@@ -171,8 +171,8 @@ module.exports = function httpAdapter(config) {
       transport = isHttpsProxy ? httpsFollow : httpFollow;
     }
 
-    if (config.maxContentLength && config.maxContentLength > -1) {
-      options.maxBodyLength = config.maxContentLength;
+    if (config.maxBodyLength > -1) {
+      options.maxBodyLength = config.maxBodyLength;
     }
 
     // Create the request

lib/core/mergeConfig.js

@@ -21,7 +21,7 @@ module.exports = function mergeConfig(config1, config2) {
     'baseURL', 'url', 'transformRequest', 'transformResponse', 'paramsSerializer',
     'timeout', 'withCredentials', 'adapter', 'responseType', 'xsrfCookieName',
     'xsrfHeaderName', 'onUploadProgress', 'onDownloadProgress',
-    'maxContentLength', 'validateStatus', 'maxRedirects', 'httpAgent',
+    'maxContentLength', 'maxBodyLength', 'validateStatus', 'maxRedirects', 'httpAgent',
     'httpsAgent', 'cancelToken', 'socketPath', 'responseEncoding'
   ];
 

lib/defaults.js

@@ -74,6 +74,7 @@ var defaults = {
   xsrfHeaderName: 'X-XSRF-TOKEN',
 
   maxContentLength: -1,
+  maxBodyLength: -1,
 
   validateStatus: function validateStatus(status) {
     return status >= 200 && status < 300;