diff --git a/index.js b/index.js
index f4f16e8..76ea30c 100644
--- a/index.js
+++ b/index.js
@@ -197,6 +197,9 @@ export default class Request {
           }
         }
       })
+      .on('buffer', buf => {
+        this.#body = buf
+      })
       .on('error', out.reject)
       .on('end', _ => {
         if (contentType.includes('urlencoded')) {
diff --git a/lib/index.js b/lib/index.js
index 5647007..1deb997 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -6,7 +6,7 @@ import { EventEmitter } from 'node:events'
 import File from './file.js'
 import { MultipartParser } from './multipart_parser.js'
 import { UrlencodedParser } from './urlencoded_parser.js'
-import { OctetParser, EmptyParser } from './octet_parser.js'
+import { OctetParser, BufferParser, EmptyParser } from './octet_parser.js'
 import { JSONParser } from './json_parser.js'
 
 function randomPath(uploadDir) {
@@ -98,8 +98,8 @@ export default class IncomingForm extends EventEmitter {
       let value = Buffer.from('')
 
       part
-        .on('data', buff => {
-          value = Buffer.concat([value, buff])
+        .on('data', buf => {
+          value = Buffer.concat([value, buf])
         })
         .on('end', () => {
           this.emit('field', part.name, value.toString(this.encoding))
@@ -167,7 +167,7 @@ export default class IncomingForm extends EventEmitter {
       return this.#createJsonParser()
     }
 
-    this.#handleError(new TypeError('unknown content-type: ' + contentType))
+    this.#createBufferParser()
   }
 
   #parseContentLength() {
@@ -316,6 +316,21 @@ export default class IncomingForm extends EventEmitter {
       .on('error', err => this.#handleError(err))
   }
 
+  #createBufferParser() {
+    this.#parser = new BufferParser()
+
+    if (this.bytesExpected) {
+      this.#parser.initLength(this.bytesExpected)
+    }
+
+    this.#parser
+      .on('buffer', buf => {
+        this.emit('buffer', buf)
+      })
+      .on('end', () => this.#handleEnd())
+      .on('error', err => this.#handleError(err))
+  }
+
   #clearUploads() {
     while (this.#openedFiles.length) {
       let file = this.#openedFiles.pop()
diff --git a/lib/json_parser.js b/lib/json_parser.js
index 779a2ad..9fb5247 100644
--- a/lib/json_parser.js
+++ b/lib/json_parser.js
@@ -1,7 +1,7 @@
 import { EventEmitter } from 'node:events'
 
 export class JSONParser extends EventEmitter {
-  #buff = Buffer.from('')
+  #buf = Buffer.from('')
   #byteLen = 0
 
   initLength(length) {
@@ -9,12 +9,12 @@ export class JSONParser extends EventEmitter {
   }
 
   write(buffer) {
-    this.#buff = Buffer.concat([this.#buff, buffer])
+    this.#buf = Buffer.concat([this.#buf, buffer])
   }
 
   end() {
-    if (this.#buff.length === this.#byteLen) {
-      let data = this.#buff.toString()
+    if (this.#buf.length === this.#byteLen) {
+      let data = this.#buf.toString()
       let fields = data
       try {
         fields = JSON.parse(data)
@@ -28,14 +28,14 @@ export class JSONParser extends EventEmitter {
       this.emit('field', false, fields)
       this.emit('end')
 
-      this.#buff = null
+      this.#buf = null
     } else {
       this.emit(
         'error',
         new Error(
           `The uploaded data is incomplete. Expected ${
             this.#byteLen
-          }, Received ${this.#buff.length} .`
+          }, Received ${this.#buf.length} .`
         )
       )
     }
diff --git a/lib/multipart_parser.js b/lib/multipart_parser.js
index 8c04033..75a1e83 100644
--- a/lib/multipart_parser.js
+++ b/lib/multipart_parser.js
@@ -73,11 +73,11 @@ export class MultipartParser {
     this[k + 'Mark'] = v
   }
 
-  #emit(name, buff, idx, cleanup) {
+  #emit(name, buf, idx, cleanup) {
     let mark = name + 'Mark'
     if (this[mark] !== void 0) {
       let start = this[mark]
-      let end = buff.length
+      let end = buf.length
 
       if (cleanup) {
         end = idx
@@ -89,7 +89,7 @@ export class MultipartParser {
       if (start === end) {
         return
       }
-      this['$' + name](buff.slice(start, end))
+      this['$' + name](buf.slice(start, end))
     }
   }
 
diff --git a/lib/octet_parser.js b/lib/octet_parser.js
index fc0e4b4..cff9ca8 100644
--- a/lib/octet_parser.js
+++ b/lib/octet_parser.js
@@ -47,6 +47,36 @@ export class OctetParser extends EventEmitter {
   }
 }
 
+export class BufferParser extends EventEmitter {
+  #buf = Buffer.from('')
+  #byteLen = 0
+
+  initLength(length) {
+    this.#byteLen = length
+  }
+
+  write(buffer) {
+    this.#buf = Buffer.concat([this.#buf, buffer])
+  }
+
+  end() {
+    if (this.#buf.length === this.#byteLen) {
+      this.emit('buffer', this.#buf)
+      this.emit('end')
+      this.#buf = null
+    } else {
+      this.emit(
+        'error',
+        new Error(
+          `The uploaded data is incomplete. Expected ${
+            this.#byteLen
+          }, Received ${this.#buf.length} .`
+        )
+      )
+    }
+  }
+}
+
 export class EmptyParser extends EventEmitter {
   write() {}
 
diff --git a/lib/urlencoded_parser.js b/lib/urlencoded_parser.js
index 78c61d0..55020be 100644
--- a/lib/urlencoded_parser.js
+++ b/lib/urlencoded_parser.js
@@ -8,17 +8,17 @@ import { parse } from 'node:querystring'
 import { EventEmitter } from 'node:events'
 
 export class UrlencodedParser extends EventEmitter {
-  #buff = Buffer.from('')
+  #buf = Buffer.from('')
 
   write(buffer) {
-    this.#buff = Buffer.concat([this.#buff, buffer])
+    this.#buf = Buffer.concat([this.#buf, buffer])
   }
 
   end() {
-    let data = this.#buff.toString()
+    let data = this.#buf.toString()
     let fields = parse(data)
 
-    this.#buff = null
+    this.#buf = null
 
     this.emit('field', fields)
     this.emit('end')
diff --git a/package.json b/package.json
index c1151b1..324f8f0 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@gm5/request",
-  "version": "2.0.4",
+  "version": "2.0.5",
   "description": "对Http的Request进一步封装, 提供常用的API",
   "main": "index.js",
   "author": "yutent",