From cf92e3dee8b71e1fa5f1a46592b04b6520690863 Mon Sep 17 00:00:00 2001
From: Nick K <nick.kruchinin@gmail.com>
Date: Wed, 5 Apr 2023 21:56:51 +0300
Subject: [PATCH] Revert headers changes due to #15

---
 lib/FormDataEncoder.test.ts | 62 -------------------------------------
 lib/FormDataEncoder.ts      | 30 ++++++------------
 2 files changed, 9 insertions(+), 83 deletions(-)

diff --git a/lib/FormDataEncoder.test.ts b/lib/FormDataEncoder.test.ts
index 1e62ba3..8c20f3a 100644
--- a/lib/FormDataEncoder.test.ts
+++ b/lib/FormDataEncoder.test.ts
@@ -106,26 +106,6 @@ test("Has contentLength property", async t => {
   )
 })
 
-test(
-  "contentLength property is undefined if there's file without known length",
-
-  t => {
-    const form = new FormData()
-
-    form.set("stream", {
-      [Symbol.toStringTag]: "File",
-      name: "file.txt",
-      stream() {
-        return Readable.from([Buffer.from("foo")])
-      }
-    })
-
-    const encoder = new FormDataEncoder(form)
-
-    t.is(encoder.contentLength, undefined)
-  }
-)
-
 test("contentLength property is read-only", t => {
   const encoder = new FormDataEncoder(new FormData())
 
@@ -157,28 +137,6 @@ test("Has correct headers", async t => {
   })
 })
 
-test(
-  "Has only Content-Type header if there's file without known length",
-
-  t => {
-    const form = new FormData()
-
-    form.set("stream", {
-      [Symbol.toStringTag]: "File",
-      name: "file.txt",
-      stream() {
-        return Readable.from([Buffer.from("foo")])
-      }
-    })
-
-    const encoder = new FormDataEncoder(form)
-
-    t.deepEqual(encoder.headers, {
-      "Content-Type": `multipart/form-data; boundary=${encoder.boundary}`
-    })
-  }
-)
-
 test("Yields correct footer for empty FormData", async t => {
   const encoder = new FormDataEncoder(new FormData())
 
@@ -215,26 +173,6 @@ test("Returns the length of the FormData content", async t => {
   t.is(encoder.getContentLength(), expected)
 })
 
-test(
-  ".getContentLength() returns undefined if there's file without known length",
-
-  t => {
-    const form = new FormData()
-
-    form.set("stream", {
-      [Symbol.toStringTag]: "File",
-      name: "file.txt",
-      stream() {
-        return Readable.from([Buffer.from("foo")])
-      }
-    })
-
-    const encoder = new FormDataEncoder(form)
-
-    t.is(encoder.getContentLength(), undefined)
-  }
-)
-
 test(".values() yields headers as Uint8Array", t => {
   const form = new FormData()
 
diff --git a/lib/FormDataEncoder.ts b/lib/FormDataEncoder.ts
index 8629b5f..ac8756d 100644
--- a/lib/FormDataEncoder.ts
+++ b/lib/FormDataEncoder.ts
@@ -13,7 +13,7 @@ import {FileLike} from "./FileLike"
 
 interface Headers {
   "Content-Type": string
-  "Content-Length"?: string
+  "Content-Length": string
 }
 
 export interface FormDataEncoderOptions {
@@ -74,7 +74,7 @@ export class FormDataEncoder {
   /**
    * Returns Content-Length header
    */
-  readonly contentLength: string | undefined
+  readonly contentLength: string
 
   /**
    * Returns headers object with Content-Type and Content-Length header
@@ -168,17 +168,12 @@ export class FormDataEncoder {
       `${this.#DASHES}${this.boundary}${this.#DASHES}${this.#CRLF.repeat(2)}`
     )
 
-    const contentLength = this.getContentLength()
-    const headers: Headers = {
-      "Content-Type": this.contentType
-    }
+    this.contentLength = String(this.getContentLength())
 
-    if (contentLength != null) {
-      this.contentLength = String(contentLength)
-      headers["Content-Length"] = this.contentLength
-    }
-
-    this.headers = Object.freeze(headers)
+    this.headers = Object.freeze<Headers>({
+      "Content-Length": this.contentLength,
+      "Content-Type": this.contentType
+    })
 
     // Make sure following properties read-only in runtime.
     Object.defineProperties(this, {
@@ -213,22 +208,15 @@ export class FormDataEncoder {
   /**
    * Returns form-data content length
    */
-  getContentLength(): number | undefined {
+  getContentLength(): number {
     let length = 0
 
     for (const [name, raw] of this.#form) {
       const value = isFileLike(raw) ? raw : this.#encoder.encode(normalize(raw))
 
-      const size = isFileLike(value) ? value.size : value.byteLength
-
-      // Return `undefined` if encountered part without known size
-      if (size == null || isNaN(size)) {
-        return undefined
-      }
-
       length += this.#getFieldHeader(name, value).byteLength
 
-      length += size
+      length += isFileLike(value) ? value.size : value.byteLength
 
       length += this.#CRLF_BYTES_LENGTH
     }