avwo · She-yh · Dec 13, 2025
diff --git a/biz/webui/cgi-bin/init.js b/biz/webui/cgi-bin/init.js
@@ -22,6 +22,7 @@ module.exports = function(req, res) {
     epm: config.epm,
     custom1: properties.get('Custom1'),
     custom2: properties.get('Custom2'),
+    maxReqMergeSize: properties.get('maxReqMergeSize') || 1024 * 1024,
     hasInvalidCerts: ca.hasInvalidCerts,
     supportH2: config.enableH2,
     lastLogId: lastLog && lastLog.id,

diff --git a/biz/webui/cgi-bin/set-max-req-merge-size.js b/biz/webui/cgi-bin/set-max-req-merge-size.js
@@ -0,0 +1,9 @@
+var properties = require('../../../lib/rules/util').properties;
+
+var DEFAULT_SIZE = 1024 * 1024; // 1MB
+
+module.exports = function(req, res) {
+  var size = parseInt(req.body.size, 10);
+  properties.set('maxReqMergeSize', size);
+  res.json({ ec: 0, size: properties.get('maxReqMergeSize') || DEFAULT_SIZE });
+};
diff --git a/biz/webui/htdocs/js/index.js b/biz/webui/htdocs/js/index.js
diff --git a/biz/webui/htdocs/src/js/data-center.js b/biz/webui/htdocs/src/js/data-center.js
@@ -606,6 +606,7 @@ $.extend(
       enableHttp2: 'cgi-bin/enable-http2',
       abort: 'cgi-bin/abort',
       setCustomColumn: 'cgi-bin/set-custom-column',
+      setMaxReqMergeSize: 'cgi-bin/set-max-req-merge-size',
       addRulesAndValues: {
         url: 'cgi-bin/add-rules-values',
         contentType: 'application/json'
@@ -795,6 +796,7 @@ exports.getInitialData = function (callback) {
         exports.custom2 = data.custom2;
         exports.custom1Key = data.custom1Key;
         exports.custom2Key = data.custom2Key;
+        exports.maxReqMergeSize = data.maxReqMergeSize;
         initialData = data;
         clientId = data.clientId;
         DEFAULT_CONF.data.clientId = clientId;

diff --git a/biz/webui/htdocs/src/js/network-settings.js b/biz/webui/htdocs/src/js/network-settings.js
@@ -20,7 +20,11 @@ var Settings = React.createClass({
     var dragger = columns.getDragger();
     var urlType = storage.get('urlType');
     dragger.onDrop = dragger.onDrop.bind(this);
-    return $.extend(this.getNetworkSettings(), { dragger: dragger, urlType: urlType === '-' ? '-' : '' });
+    return $.extend(this.getNetworkSettings(), {
+      dragger: dragger,
+      urlType: urlType === '-' ? '-' : '',
+      maxReqMergeSize: dataCenter.maxReqMergeSize || 1048576
+    });
   },
   getNetworkSettings: function () {
     return $.extend(dataCenter.getFilterText(), {
@@ -133,6 +137,16 @@ var Settings = React.createClass({
   onRowsChange: function (e) {
     NetworkModal.setMaxRows(e.target.value);
   },
+  onMaxReqMergeSizeChange: function (e) {
+    var self = this;
+    var size = parseInt(e.target.value, 10);
+    dataCenter.setMaxReqMergeSize({ size: size }, function (data) {
+      if (data && data.ec === 0) {
+        dataCenter.maxReqMergeSize = data.size;
+        self.setState({ maxReqMergeSize: data.size });
+      }
+    });
+  },
   showDialog: function () {
     var settings = this.getNetworkSettings();
     this.setState(settings);
@@ -489,6 +503,22 @@ var Settings = React.createClass({
               <option value="3000">3000</option>
             </select>
           </label>
+          <label className="w-network-settings-own">
+            Max ReqMerge Size:
+            <select
+              className="form-control"
+              onChange={self.onMaxReqMergeSizeChange}
+              value={state.maxReqMergeSize || 1048576}
+            >
+              <option value="262144">256KB</option>
+              <option value="524288">512KB</option>
+              <option value="1048576">1MB</option>
+              <option value="2097152">2MB</option>
+              <option value="4194304">4MB</option>
+              <option value="8388608">8MB</option>
+              <option value="16777216">16MB</option>
+            </select>
+          </label>
           <label className="w-network-settings-own">
             <input
               checked={dataCenter.isOnlyViewOwnData()}

diff --git a/docs/docs/gui/network.md b/docs/docs/gui/network.md
@@ -73,6 +73,7 @@ b:/"success":false/ m:POST s:200 H:api.example.com
 | ----------------------------------------- | -------------------------------------------------------- |
 | **Network Columns**                       | 自定义抓包列表显示的列（如状态码、方法、大小等）         |
 | **Maximum Rows**                          | 设置同时显示的最大抓包数量（防止内存溢出）               |
+| **Max ReqMerge Size**                     | 设置 [reqMerge](../rules/reqMerge) 规则处理请求体的最大大小（默认 1MB，可选 256KB ~ 16MB），超过该大小的请求体将不会被合并处理 |
 | **Viewing only your computer's requests** | 只显示本机发出的请求（过滤其他设备/远程请求）            |
 | **ViewAll in new window**                 | 点击"View All"时在新窗口打开完整内容（适合大响应体查看） |
 | **Show Tree View**                        | 以树状结构展示请求（按域名/路径分组）                    |

diff --git a/docs/docs/rules/reqMerge.md b/docs/docs/rules/reqMerge.md
@@ -47,6 +47,11 @@ www.example.com/path2 reqMerge://https://www.xxx.com/xxx/params.json
 www.example.com/path3 reqMerge://temp/blank.json
 ````
 
+## 请求体大小限制
+`reqMerge` 规则默认只处理请求体大小不超过 **1MB** 的请求。如果请求体超过该限制，将不会进行合并处理，请求体将原样发送。
+
+可以在 [Network Settings](../gui/network#settings) 中通过 **Max ReqMerge Size** 选项调整该限制，支持的范围为 256KB ~ 16MB。
+
 ## 关联协议
 1. 通过关键字或正则替换：[reqReplace](./reqReplace)
 2. 修改响应内容对象：[resMerge](./resMerge)

diff --git a/docs/en/docs/gui/network.md b/docs/en/docs/gui/network.md
@@ -72,6 +72,7 @@ Different from the search box at the bottom of the Network list:
 | ----------------------------------------- | -------------------------------------------------------- |
 | **Network Columns** | Customize the columns displayed in the packet capture list (such as status code, method, size, etc.) |
 | **Maximum Rows** | Set the maximum number of packets displayed simultaneously (to prevent memory overflow) |
+| **Max ReqMerge Size** | Set the maximum request body size for [reqMerge](../rules/reqMerge) rule processing (default 1MB, range 256KB ~ 16MB). Request bodies exceeding this size will not be merged |
 | **Viewing only your computer's requests** | Displays only requests sent by the local computer (filters requests from other devices/remote requests) |
 | **View All in new window** | Click "View All" to open the full content in a new window (suitable for viewing large response bodies) |
 | **Show Tree View** | Displays requests in a tree structure (grouped by domain name/path) |

diff --git a/docs/en/docs/rules/reqMerge.md b/docs/en/docs/rules/reqMerge.md
@@ -47,6 +47,11 @@ www.example.com/path2 reqMerge://https://www.xxx.com/xxx/params.json
 www.example.com/path3 reqMerge://temp/blank.json
 ````
 
+## Request Body Size Limit
+The `reqMerge` rule only processes request bodies up to **1MB** by default. If the request body exceeds this limit, it will not be merged and will be sent as-is.
+
+You can adjust this limit in [Network Settings](../gui/network#settings) via the **Max ReqMerge Size** option, with a supported range of 256KB ~ 16MB.
+
 ## Associated Protocols
 1. Replace with a keyword or regular expression: [reqReplace](./reqReplace)
 2. Modify the response content object: [resMerge](./resMerge)
diff --git a/lib/inspectors/req.js b/lib/inspectors/req.js
@@ -6,6 +6,7 @@ var Buffer = require('safe-buffer').Buffer;
 var mime = require('mime');
 var pluginMgr = require('../plugins');
 var config = require('../config');
+var properties = require('../rules/util').properties;
 
 var Transform = require('pipestream').Transform;
 var WhistleTransform = util.WhistleTransform;
@@ -14,7 +15,11 @@ var ReplaceStringTransform = util.ReplaceStringTransform;
 var FileWriterTransform = util.FileWriterTransform;
 
 var JSON_RE = /{[\w\W]*}|\[[\w\W]*\]/;
-var MAX_REQ_SIZE = 1024 * 1024;
+var DEFAULT_MAX_REQ_SIZE = 1024 * 1024;
+
+function getMaxReqSize() {
+  return properties.get('maxReqMergeSize') || DEFAULT_MAX_REQ_SIZE;
+}
 var MAX_HEADER_SIZE = 1024 * 8;
 var CRLF = Buffer.from('\r\n');
 var CR = CRLF[0];
@@ -159,12 +164,13 @@ function handleParams(req, params, urlParams) {
       delete headers['content-length'];
       transform = new Transform();
       var interrupt;
+      var maxReqSize = getMaxReqSize();
       transform._transform = function (chunk, _, callback) {
         if (chunk) {
           if (!interrupt) {
             buffer = buffer ? Buffer.concat([buffer, chunk]) : chunk;
             chunk = null;
-            if (buffer.length > MAX_REQ_SIZE) {
+            if (buffer.length > maxReqSize) {
               interrupt = true;
               chunk = buffer;
               buffer = null;
@@ -204,7 +210,7 @@ function handleParams(req, params, urlParams) {
             chunk = util.toBuffer(body);
           }
           buffer = null;
-        } else if (params) {
+        } else if (params && !interrupt) {
           util.deleteProps(params, delProps);
           var data = isJson ? JSON.stringify(params) : qs.stringify(params);
           chunk = util.toBuffer(data);