1 files changed, 78 insertions, 0 deletions
diff --git a/test/issue-1903.js b/test/issue-1903.js
new file mode 100644
index 0000000..76ac81e
--- /dev/null
+++ b/test/issue-1903.js
@@ -0,0 +1,78 @@
+'use strict'
+
+const { createServer } = require('http')
+const { test } = require('tap')
+const { request } = require('..')
+const { nodeMajor } = require('../lib/core/util')
+
+function createPromise () {
+  const result = {}
+  result.promise = new Promise((resolve) => {
+    result.resolve = resolve
+  })
+  return result
+}
+
+test('should parse content-disposition consistently', { skip: nodeMajor >= 18 }, async (t) => {
+  t.plan(5)
+
+  // create promise to allow server spinup in parallel
+  const spinup1 = createPromise()
+  const spinup2 = createPromise()
+  const spinup3 = createPromise()
+
+  // variables to store content-disposition header
+  const header = []
+
+  const server = createServer((req, res) => {
+    res.writeHead(200, {
+      'content-length': 2,
+      'content-disposition': "attachment; filename='år.pdf'"
+    })
+    header.push("attachment; filename='år.pdf'")
+    res.end('OK', spinup1.resolve)
+  })
+  t.teardown(server.close.bind(server))
+  server.listen(0, spinup1.resolve)
+
+  const proxy1 = createServer(async (req, res) => {
+    const { statusCode, headers, body } = await request(`http://localhost:${server.address().port}`, {
+      method: 'GET'
+    })
+    header.push(headers['content-disposition'])
+    delete headers['transfer-encoding']
+    res.writeHead(statusCode, headers)
+    body.pipe(res)
+  })
+  t.teardown(proxy1.close.bind(proxy1))
+  proxy1.listen(0, spinup2.resolve)
+
+  const proxy2 = createServer(async (req, res) => {
+    const { statusCode, headers, body } = await request(`http://localhost:${proxy1.address().port}`, {
+      method: 'GET'
+    })
+    header.push(headers['content-disposition'])
+    delete headers['transfer-encoding']
+    res.writeHead(statusCode, headers)
+    body.pipe(res)
+  })
+  t.teardown(proxy2.close.bind(proxy2))
+  proxy2.listen(0, spinup3.resolve)
+
+  // wait until all server spinup
+  await Promise.all([spinup1.promise, spinup2.promise, spinup3.promise])
+
+  const { statusCode, headers, body } = await request(`http://localhost:${proxy2.address().port}`, {
+    method: 'GET'
+  })
+  header.push(headers['content-disposition'])
+  t.equal(statusCode, 200)
+  t.equal(await body.text(), 'OK')
+
+  // we check header
+  // must not be the same in first proxy
+  t.notSame(header[0], header[1])
+  // chaining always the same value
+  t.equal(header[1], header[2])
+  t.equal(header[2], header[3])
+})