# HTTP Request No Reply

**URL:** <https://discourse.nodered.org/t/http-request-no-reply/18260>\
**Category:** General\
**Created:** [22 November 2019 02:31 UTC](https://discourse.nodered.org/t/http-request-no-reply/18260 "2019-11-22T02:31:07Z")\
**Posts on this page:** 20\
**Page:** 1

<div class="post-metadata">

**Author:** ![pcgopher](https://avatars.discourse-cdn.com/v4/letter/p/96bed5/32.png) [@pcgopher](https://discourse.nodered.org/u/pcgopher)\
**Post date:** [22 November 2019 02:31 UTC](https://discourse.nodered.org/t/http-request-no-reply/18260/1 "2019-11-22T02:31:08Z")

</div>

Hi All,

I'm fairly new to Node-RED, so please bear with me...  
I'm trying to set up a flow with a http-request node to send POST requests to an IP device on my network. However, I'm not getting a response back from the device. When I do a WireShark capture between the PC running NodeRED and my controller, I see that the controller gives a "403 Forbidden" error.

What really confuses me is that I've set up exactly the same flow on an Android device and that has no problem getting a response from the controller. Same network, same flow, same controller, just different host device.

Please advise me how I can troubleshoot this problem. It's really getting the best of a novice Node-RED user.

Thanks!

---

<div class="post-metadata">

**Author:** ![baqwas](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/baqwas/32/106_2.png) [@baqwas](https://discourse.nodered.org/u/baqwas)\
**Post date:** [22 November 2019 15:41 UTC](https://discourse.nodered.org/t/http-request-no-reply/18260/2 "2019-11-22T15:41:47Z")

</div>

Hello @pcgopher,

I am a newbie too. I would suggest that you append a **Debug** node to display the response. You may have to set a value for _User-Agent_ in the request payload. Browsers do it automatically and hence their requests are honored. The **HTTP** node does not and therefore when this nominal checking is performed at the server the HTTP 403 response is generated.

Regards.

---

<div class="post-metadata">

**Author:** ![pcgopher](https://avatars.discourse-cdn.com/v4/letter/p/96bed5/32.png) [@pcgopher](https://discourse.nodered.org/u/pcgopher)\
**Post date:** [22 November 2019 17:10 UTC](https://discourse.nodered.org/t/http-request-no-reply/18260/3 "2019-11-22T17:10:55Z")

</div>

Thanks for your reply!

I did append a Debug node and only get a " " as a response.

However, on the flow that works on the android device, I get '"\<?xml version="1.0" ? ADAM-6260 status="OK" /ADAM-6260"' as a response.

---

<div class="post-metadata">

**Author:** ![baqwas](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/baqwas/32/106_2.png) [@baqwas](https://discourse.nodered.org/u/baqwas)\
**Post date:** [22 November 2019 17:32 UTC](https://discourse.nodered.org/t/http-request-no-reply/18260/4 "2019-11-22T17:32:02Z")

</div>

Here is a bit of snippet that perhaps will help you to prep your request header prior to invoking the HTTP node:

```auto

msg.headers = {};
msg.headers['User-Agent'] = 'Mozilla/5.0 (Macintosh; Intel Mac OS X x.y; rv:42.0) Gecko/20100101 Firefox/42.0';

```

Obviously, _User-Agent_ illustrated is an example only. I use a Function node that precedes the HTTP node to prep the request as I have to build some additional parameters for the HTTP payload and not just the HTTP header.

---

<div class="post-metadata">

**Author:** ![pcgopher](https://avatars.discourse-cdn.com/v4/letter/p/96bed5/32.png) [@pcgopher](https://discourse.nodered.org/u/pcgopher)\
**Post date:** [22 November 2019 17:57 UTC](https://discourse.nodered.org/t/http-request-no-reply/18260/5 "2019-11-22T17:57:54Z")

</div>

Please take a look at my flow. Would you mind making the edits you suggested and re-post it.

```auto
[{"id":"28ff262d.27d912","type":"inject","z":"1fcf8288.513a9d","name":"Timer","topic":"","payload":"","payloadType":"date","repeat":"10","crontab":"","once":true,"x":240,"y":180,"wires":[["2b91b135.7673e6"]]},{"id":"88e79510.a8f15","type":"debug","z":"1fcf8288.513a9d","name":"","active":true,"console":"false","complete":"false","x":1168.93408203125,"y":570.5867691040039,"wires":[]},{"id":"62c1567b.be7b2","type":"function","z":"1fcf8288.513a9d","name":"","func":"msg.payload = \"DO0=\"+context.global.heater1 + \"&DO1=\" + context.global.heater2 +\"&DO2=\"+context.global.heater3+\"&DO3=\"+context.global.heater4 +\"&DO4=\"+context.global.heater5 +\"&DO5=\"+context.global.heater6;\nreturn msg;","outputs":1,"noerr":0,"x":732.9931640625,"y":661.2639236450195,"wires":[["d7613b58.4abf48","7bbf16fa.ba3128"]]},{"id":"2b91b135.7673e6","type":"delay","z":"1fcf8288.513a9d","name":"","pauseType":"delay","timeout":"2","timeoutUnits":"seconds","rate":"1","nbRateUnits":"1","rateUnits":"second","randomFirst":"1","randomLast":"5","randomUnits":"seconds","drop":false,"x":501.93408203125,"y":658.586799621582,"wires":[["62c1567b.be7b2"]]},{"id":"d7613b58.4abf48","type":"debug","z":"1fcf8288.513a9d","name":"","active":true,"console":"false","complete":"false","x":1168.93408203125,"y":670.5867691040039,"wires":[]},{"id":"7bbf16fa.ba3128","type":"http request","z":"1fcf8288.513a9d","name":"","method":"POST","ret":"txt","paytoqs":false,"url":"http://10.1.0.105/digitaloutput/all/value/","tls":"","persist":false,"proxy":"","authType":"basic","x":928.93408203125,"y":570.5867691040039,"wires":[["88e79510.a8f15"]]}]

```

---

<div class="post-metadata">

**Author:** ![baqwas](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/baqwas/32/106_2.png) [@baqwas](https://discourse.nodered.org/u/baqwas)\
**Post date:** [22 November 2019 18:22 UTC](https://discourse.nodered.org/t/http-request-no-reply/18260/6 "2019-11-22T18:22:17Z")

</div>

OK, I will draft an alternate approach for you shortly. Rgds.

---

<div class="post-metadata">

**Author:** ![baqwas](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/baqwas/32/106_2.png) [@baqwas](https://discourse.nodered.org/u/baqwas)\
**Post date:** [22 November 2019 18:32 UTC](https://discourse.nodered.org/t/http-request-no-reply/18260/7 "2019-11-22T18:32:52Z")

</div>

My changes:

- Prepare the HTTP request payload

- Use an arbitrary string for User-Agent

- Change the HTTP method to GET and use payload as query parameters

`[{"id":"76963223.f9f0cc","type":"inject","z":"f88b6022.f53bd","name":"Timer","topic":"","payload":"","payloadType":"date","repeat":"10","crontab":"","once":true,"x":260,"y":1140,"wires":[["f90dfe23.61fa08"]]},{"id":"93b91cc3.fa59e","type":"debug","z":"f88b6022.f53bd","name":"","active":true,"console":"false","complete":"false","x":1188.93408203125,"y":1530.586769104004,"wires":[]},{"id":"2d59ea24.a3aa2e","type":"function","z":"f88b6022.f53bd","name":"","func":"//msg.payload = \"DO0=\"+context.global.heater1 + \"&DO1=\" + context.global.heater2 +\"&DO2=\"+context.global.heater3+\"&DO3=\"+context.global.heater4 +\"&DO4=\"+context.global.heater5 +\"&DO5=\"+context.global.heater6;\nmsg.payload = {\n \"DO0\":context.global.heater1,\n \"DO1\":context.global.heater2,\n \"DO2\":context.global.heater3,\n \"DO3\":context.global.heater4,\n \"DO4\":context.global.heater5,\n \"DO5\":context.global.heater6\n };\nmsg.headers = {};\nmsg.headers['User-Agent'] = 'Mozilla/5.0 (Macintosh; Intel Mac OS X x.y; rv:42.0) Gecko/20100101 Firefox/42.0';\nreturn msg;","outputs":1,"noerr":0,"x":752.9931640625,"y":1621.2639236450195,"wires":[["b9a8c66b.e67758","2da677bd.ad1798"]]},{"id":"f90dfe23.61fa08","type":"delay","z":"f88b6022.f53bd","name":"","pauseType":"delay","timeout":"2","timeoutUnits":"seconds","rate":"1","nbRateUnits":"1","rateUnits":"second","randomFirst":"1","randomLast":"5","randomUnits":"seconds","drop":false,"x":521.93408203125,"y":1618.586799621582,"wires":[["2d59ea24.a3aa2e"]]},{"id":"b9a8c66b.e67758","type":"debug","z":"f88b6022.f53bd","name":"","active":true,"console":"false","complete":"false","x":1188.93408203125,"y":1630.586769104004,"wires":[]},{"id":"2da677bd.ad1798","type":"http request","z":"f88b6022.f53bd","name":"","method":"GET","ret":"txt","paytoqs":true,"url":"http://10.1.0.105/digitaloutput/all/value/","tls":"","proxy":"","authType":"basic","x":948.93408203125,"y":1530.586769104004,"wires":[["93b91cc3.fa59e"]]}]`

Just an adaption of what works for me. The key here is that the server will accept a GET and not insist on POST only for security reasons (again don't want to get into the weeds with a thesis here but just a word of caution in case my proposed changes don't work out for you otherwise we will have to explore the POST method).

Kind regards.

---

<div class="post-metadata">

**Author:** ![pcgopher](https://avatars.discourse-cdn.com/v4/letter/p/96bed5/32.png) [@pcgopher](https://discourse.nodered.org/u/pcgopher)\
**Post date:** [22 November 2019 18:48 UTC](https://discourse.nodered.org/t/http-request-no-reply/18260/8 "2019-11-22T18:48:38Z")

</div>

Baqwas - I still don't get a response form the controller. I'm not sure the GET can work. I've attached a section from the manual on how the manufacture advises the setup to be

I really appreciate your time!

 ![POST](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/2X/d/d69c04006fbd3dca76c07c3a3098e077811cf899.png)

---

<div class="post-metadata">

**Author:** ![baqwas](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/baqwas/32/106_2.png) [@baqwas](https://discourse.nodered.org/u/baqwas)\
**Post date:** [22 November 2019 19:13 UTC](https://discourse.nodered.org/t/http-request-no-reply/18260/9 "2019-11-22T19:13:30Z")

</div>

OK, I understand. Let me check the POST method for you. I'll need a bit more time for _unrelated_ reasons. Rgds.

**P.S.** Brings back decade old memories when I used to mandate the use of POST and inhibit GET. Hoisted by my own petard as they say.

---

<div class="post-metadata">

**Author:** ![baqwas](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/baqwas/32/106_2.png) [@baqwas](https://discourse.nodered.org/u/baqwas)\
**Post date:** [22 November 2019 22:22 UTC](https://discourse.nodered.org/t/http-request-no-reply/18260/10 "2019-11-22T22:22:15Z")

</div>

Hello pcgopher,

Can you try the following snippet (to check the **POST** method) after making changes to the **DO_n_** parameters (to set the _context_ global values)? You may want to start with static values for these parameters unless impractical. Additionally, you may want to insert the string for ContentType in header in a manner similar to that used for User-Agent.

```auto
[{"id":"80aea113.0491c8","type":"inject","z":"abcc5f46.84c58","name":"Timer","topic":"","payload":"","payloadType":"date","repeat":"10","crontab":"","once":true,"x":160,"y":160,"wires":[["ec48ae99.081be8"]]},{"id":"304cd64f.00b85a","type":"debug","z":"abcc5f46.84c58","name":"Debug: HTTP response","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","x":910,"y":160,"wires":[]},{"id":"465dfc62.fab69c","type":"function","z":"abcc5f46.84c58","name":"Prep request","func":"//msg.payload = \"DO0=\"+context.global.heater1 + \"&DO1=\" + context.global.heater2 +\"&DO2=\"+context.global.heater3+\"&DO3=\"+context.global.heater4 +\"&DO4=\"+context.global.heater5 +\"&DO5=\"+context.global.heater6;\nmsg.payload = {\n \"DO0\": \"do1\",\n \"DO1\": \"do2\",\n \"DO2\": \"do3\",\n \"DO3\": \"do4\",\n \"DO4\": \"do5\",\n \"DO5\": \"do61\",\n};\nmsg.headers = {\n \"User-Agent\": 'Mozilla/5.0 (Macintosh; Intel Mac OS X x.y; rv:42.0) Gecko/20100101 Firefox/42.0'\n}\nreturn msg;","outputs":1,"noerr":0,"x":490,"y":160,"wires":[["5652ebd4.e8a38c","e09eed87.4e046"]]},{"id":"ec48ae99.081be8","type":"delay","z":"abcc5f46.84c58","name":"","pauseType":"delay","timeout":"2","timeoutUnits":"seconds","rate":"1","nbRateUnits":"1","rateUnits":"second","randomFirst":"1","randomLast":"5","randomUnits":"seconds","drop":false,"x":320,"y":160,"wires":[["465dfc62.fab69c"]]},{"id":"5652ebd4.e8a38c","type":"debug","z":"abcc5f46.84c58","name":"Debug: prep request","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","x":900,"y":380,"wires":[]},{"id":"e09eed87.4e046","type":"http request","z":"abcc5f46.84c58","name":"","method":"POST","ret":"txt","paytoqs":false,"url":"http://10.1.0.105/digitaloutput/all/value/","tls":"","proxy":"","authType":"","x":690,"y":160,"wires":[["304cd64f.00b85a"]]}]

```

Haven't really done anything much with your flow/code except for the HTTP request header. If there was a public facing URL that the vendor provides for test purposes then that would shorten the debug cycles.

Kind regards.

---

<div class="post-metadata">

**Author:** ![baqwas](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/baqwas/32/106_2.png) [@baqwas](https://discourse.nodered.org/u/baqwas)\
**Post date:** [22 November 2019 22:27 UTC](https://discourse.nodered.org/t/http-request-no-reply/18260/11 "2019-11-22T22:27:23Z")

</div>

Hello pcgopher,

I used the authoritative recommendation at [article](https://developer.ibm.com/answers/questions/276380/how-do-i-send-form-data-in-http-request-node-with/) to make the changes to the function. You may recognize the source.

Kind regards.

---

<div class="post-metadata">

**Author:** ![bakman2](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/bakman2/32/6207_2.png) [@bakman2](https://discourse.nodered.org/u/bakman2)\
**Post date:** [22 November 2019 22:57 UTC](https://discourse.nodered.org/t/http-request-no-reply/18260/12 "2019-11-22T22:57:21Z")

</div>

Make sure to set the debug node to 'complete msg object' for its response.

---

<div class="post-metadata">

**Author:** ![pcgopher](https://avatars.discourse-cdn.com/v4/letter/p/96bed5/32.png) [@pcgopher](https://discourse.nodered.org/u/pcgopher)\
**Post date:** [22 November 2019 23:36 UTC](https://discourse.nodered.org/t/http-request-no-reply/18260/13 "2019-11-22T23:36:27Z")

</div>

Hi Baqwas, Here are the results...not much has changed.

> 11/22/2019, 5:29:12 PM[node: Debug: prep request](http://10.1.1.74:1880/#)
> 
> msg.payload : Object
> 
> { DO0: "do1", DO1: "do2", DO2: "do3", DO3: "do4", DO4: "do5" … }
> 
> 11/22/2019, 5:29:12 PM[node: Debug: HTTP response](http://10.1.1.74:1880/#)msg.payload : string[0]
> 
> " "

I'm not aware of any public facing URL that the vendor provides. I've worked closely with the vendor on this issue and they told me they're might be a bug in the Windows 10 version of Node-RED. But I've tried the same flow on a Linux system with the same results. However, it does work on Node-RED v. 10.0.14 on an Android device??

---

<div class="post-metadata">

**Author:** ![baqwas](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/baqwas/32/106_2.png) [@baqwas](https://discourse.nodered.org/u/baqwas)\
**Post date:** [23 November 2019 02:52 UTC](https://discourse.nodered.org/t/http-request-no-reply/18260/14 "2019-11-23T02:52:14Z")

</div>

You need to change my arbitrary values to your required values. For example:

Change "`do1`" to `context.global.heater1` and so forth. If you happen to know the static values for these, my preference would be start with these static values (sorry for recommending a dumb down approach but even on modern airplanes with FMS I look out of the window to see if the flaps are down during takeoff).

Personally, I don't think there is any bug here. It is simply a matter of using the `msg.payload` object correctly. Sorry, I'm not able to demonstrate any progress. I'll scrounge around for some public facing end point to test the basic method but I feel that the current issue lies with my suggestion on the run-time values for the **DO_n_** parameters.

Let me know what you think.

What is the HTTP response code? 2xx or 4xx?

Kind regards.

---

<div class="post-metadata">

**Author:** ![bakman2](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/bakman2/32/6207_2.png) [@bakman2](https://discourse.nodered.org/u/bakman2)\
**Post date:** [23 November 2019 07:01 UTC](https://discourse.nodered.org/t/http-request-no-reply/18260/15 "2019-11-23T07:01:15Z")

</div>

I'll repeat myself:

> Make sure to set the debug node to **'complete msg object'** for its response.

This is the only way to see what response headers you will get and a 403 will definitely show up.

---

<div class="post-metadata">

**Author:** ![pcgopher](https://avatars.discourse-cdn.com/v4/letter/p/96bed5/32.png) [@pcgopher](https://discourse.nodered.org/u/pcgopher)\
**Post date:** [23 November 2019 12:43 UTC](https://discourse.nodered.org/t/http-request-no-reply/18260/16 "2019-11-23T12:43:38Z")

</div>

Backman2 - Where can I find this setting. I looked for this yesterday, but didn't see it.

---

<div class="post-metadata">

**Author:** ![bakman2](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/bakman2/32/6207_2.png) [@bakman2](https://discourse.nodered.org/u/bakman2)\
**Post date:** [23 November 2019 12:47 UTC](https://discourse.nodered.org/t/http-request-no-reply/18260/17 "2019-11-23T12:47:59Z")

</div>

double click the debug node, change the output field.

---

<div class="post-metadata">

**Author:** ![pcgopher](https://avatars.discourse-cdn.com/v4/letter/p/96bed5/32.png) [@pcgopher](https://discourse.nodered.org/u/pcgopher)\
**Post date:** [23 November 2019 13:03 UTC](https://discourse.nodered.org/t/http-request-no-reply/18260/18 "2019-11-23T13:03:07Z")

</div>

Thanks for that! Here are the results:

```auto
11/23/2019, 7:04:32 AMnode: Debug: prep request
msg : Object
object
topic: ""
payload: object
DO0: "context.global.heater1"
DO1: "context.global.heater2"
DO2: "context.global.heater3"
DO3: "context.global.heater4"
DO4: "context.global.heater5"
DO5: "context.global.heater6"
_msgid: "44ba30e4.27ffa"
headers: object
User-Agent: "Mozilla/5.0 (Macintosh; Intel Mac OS X x.y; rv:42.0) Gecko/20100101 Firefox/42.0"
11/23/2019, 7:04:32 AMnode: Debug: HTTP responsemsg : Object
object
topic: ""
payload: ""
_msgid: "44ba30e4.27ffa"
headers: object
server: "ADAM-6000/8.1.0019"
connection: "close"
x-node-red-request-node: "578e04e6"
statusCode: 403
responseUrl: "http://10.1.0.105/digitaloutput/all/value/"
redirectList: array[0]

```

---

<div class="post-metadata">

**Author:** ![pcgopher](https://avatars.discourse-cdn.com/v4/letter/p/96bed5/32.png) [@pcgopher](https://discourse.nodered.org/u/pcgopher)\
**Post date:** [23 November 2019 13:36 UTC](https://discourse.nodered.org/t/http-request-no-reply/18260/19 "2019-11-23T13:36:30Z")

</div>

Baqwas -

The HTTP response code is 403. I think this is a strange error to get for this server, because I can easily access it with my browser by typing in only it's IP address.

I changed the DOn parameters to the values you indicated, and posted my results above.

---

<div class="post-metadata">

**Author:** ![baqwas](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/baqwas/32/106_2.png) [@baqwas](https://discourse.nodered.org/u/baqwas)\
**Post date:** [23 November 2019 16:20 UTC](https://discourse.nodered.org/t/http-request-no-reply/18260/20 "2019-11-23T16:20:42Z")

</div>

Hello pcgopher,

The HTTP 403 error cannot be resolved by the payload change that I am suggesting below but just for my understanding would it be possible to replace "`context.global.heater1`" with a static _value_ string temporarily until the access issue is resolved?

Also, I don't see the _ContentType_ value in the request header you have posted? Did you make the change for that along the following lines:

```auto
 msg.headers = {'ContentType':'application/x-www-form-urlencoded'};

```

Kind regards.

[Next page](https://discourse.nodered.org/t/http-request-no-reply/18260.md?page=2)