From 5670bd82658b15378320b2d49ce92f93e42a2c6f Mon Sep 17 00:00:00 2001
From: Ben Hardill <hardillb@gmail.com>
Date: Sat, 24 Dec 2022 19:32:33 +0000
Subject: [PATCH 1/2] Support form-data arrays

---
 .../@node-red/nodes/core/network/21-httprequest.js            | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/packages/node_modules/@node-red/nodes/core/network/21-httprequest.js b/packages/node_modules/@node-red/nodes/core/network/21-httprequest.js
index 9eac4da91..ad283657d 100644
--- a/packages/node_modules/@node-red/nodes/core/network/21-httprequest.js
+++ b/packages/node_modules/@node-red/nodes/core/network/21-httprequest.js
@@ -435,6 +435,10 @@ in your Node-RED user directory (${RED.settings.userDir}).
                                     formData.append(opt, val);
                                 } else if (typeof val === 'object' && val.hasOwnProperty('value')) {
                                     formData.append(opt,val.value,val.options || {});
+                                } else if (Array.isArray(val)) {
+                                    for (var i=0; i<val.length; i++) {
+                                        formData.append(opt, val[i])
+                                    }
                                 } else {
                                     formData.append(opt,JSON.stringify(val));
                                 }

From 661b07c8569e853131328df870c660b9cfb1deec Mon Sep 17 00:00:00 2001
From: Ben Hardill <hardillb@gmail.com>
Date: Sat, 24 Dec 2022 20:35:51 +0000
Subject: [PATCH 2/2] Add tests

---
 .../nodes/core/network/21-httprequest_spec.js | 36 ++++++++++++++++++-
 1 file changed, 35 insertions(+), 1 deletion(-)

diff --git a/test/nodes/core/network/21-httprequest_spec.js b/test/nodes/core/network/21-httprequest_spec.js
index 0348dcea1..7584c5a54 100644
--- a/test/nodes/core/network/21-httprequest_spec.js
+++ b/test/nodes/core/network/21-httprequest_spec.js
@@ -2322,7 +2322,7 @@ describe('HTTP Request Node', function() {
                     var n2 = helper.getNode("n2");
                     n2.on('input', function(msg) {
                         try{
-                            msg.payload.should.equal(`RequestError: Parse Error: Missing expected CR after header value : http://localhost:${port}/`)
+                            msg.payload.should.startWith(`RequestError: Parse Error:`)
                             done()
                         } catch (err) {
                             done(err)
@@ -2334,4 +2334,38 @@ describe('HTTP Request Node', function() {
             });
         }
     });
+
+    describe('multipart form posts', function() {
+        it('should send arrays as multiple entries', function (done) {
+            const flow = [
+                {
+                    id: 'n1', type: 'http request', wires: [['n2']], method: 'POST', ret: 'obj', url: getTestURL('/file-upload'), headers: [
+                    ]
+                },
+                { id: "n2", type: "helper" }
+            ];
+            helper.load(httpRequestNode, flow, function() {
+                var n1 = helper.getNode("n1");
+                var n2 = helper.getNode("n2");
+                n2.on('input', function(msg){
+                    try {
+                        msg.payload.body.should.have.property('foo')
+                        msg.payload.body.list.should.deepEqual(['a','b','c'])
+                        done()
+                    } catch (e) {
+                        done(e)
+                    }
+                });
+                n1.receive({
+                    headers: {
+                        'content-type': 'multipart/form-data'
+                    },
+                    payload: {
+                        foo: 'bar',
+                        list: [ 'a', 'b', 'c' ]
+                    }
+                });
+            })
+        });
+    })
 });