# Duplicate of http request

**URL:** https://discourse.nodered.org/t/duplicate-of-http-request/61954
**Category:** Dashboard
**Created:** [29 April 2022 07:47 UTC](https://discourse.nodered.org/t/duplicate-of-http-request/61954 "2022-04-29T07:47:53Z")
**Posts on this page:** 7
**Page:** 1

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### Author: ![Kai](https://avatars.discourse-cdn.com/v4/letter/k/cc9497/32.png) [@Kai](https://discourse.nodered.org/u/Kai)
#### Post date: [29 April 2022 07:47 UTC](https://discourse.nodered.org/t/duplicate-of-http-request/61954/1 "2022-04-29T07:47:53Z")

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Hi, I have do a function to list out the files from specific directory, and set a delete button besides the file name,

when user click the delete button, Node Red will delete the file and refresh the file list.

But the problem is , when I adjust the nodes and deploy the Node Red, and click the delete button, it will send 2 http request

below is my flow:  
[flows (1).json](https://discourse.nodered.org/uploads/short-url/accx4BLbtvfhFC4ZyxUCatLE3Kt.json) (7.8 KB)

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### Author: ![nico25](https://avatars.discourse-cdn.com/v4/letter/n/d2c977/32.png) [@nico25](https://discourse.nodered.org/u/nico25)
#### Post date: [29 April 2022 09:43 UTC](https://discourse.nodered.org/t/duplicate-of-http-request/61954/2 "2022-04-29T09:43:45Z")

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So if I got you right, you don´t want that the http request is sent twice?  
As an workaround you could use the delay node, to allow only 1 message per xxx milliseconds.

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### Author: ![Kai](https://avatars.discourse-cdn.com/v4/letter/k/cc9497/32.png) [@Kai](https://discourse.nodered.org/u/Kai)
#### Post date: [29 April 2022 09:46 UTC](https://discourse.nodered.org/t/duplicate-of-http-request/61954/3 "2022-04-29T09:46:38Z")

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but the weird thing is,

when I first time configure the node and deploy it, it works well.

on seconds time deploy, it call http request 2 times,

on my third time deploy, it call http request 3 times,

and so on.. no idea what's wrong with my node 🤣 🤣

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### Author: ![dceejay](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/dceejay/32/38_2.png) [@dceejay](https://discourse.nodered.org/u/dceejay)
#### Post date: [29 April 2022 10:39 UTC](https://discourse.nodered.org/t/duplicate-of-http-request/61954/4 "2022-04-29T10:39:04Z")

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you are not removing the listener when the node is closed (re-deployed) so every time you deploy you are adding another listener... so you will get one more call every time.

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### Author: ![E1cid](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/e1cid/32/77971_2.png) [@E1cid](https://discourse.nodered.org/u/E1cid)
#### Post date: [29 April 2022 11:00 UTC](https://discourse.nodered.org/t/duplicate-of-http-request/61954/5 "2022-04-29T11:00:09Z")

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Or remove the endpoint and send the file to delete in the message.

```auto
[{"id":"79924ade966c2231","type":"ui_ui_control","z":"bf9e1e33.030598","name":"","events":"all","x":210,"y":920,"wires":[["7b08ec8c.a8edbc"]]},{"id":"7b08ec8c.a8edbc","type":"switch","z":"bf9e1e33.030598","name":"","property":"tab","propertyType":"msg","rules":[{"t":"eq","v":"1","vt":"num"}],"checkall":"true","repair":false,"outputs":1,"x":360,"y":920,"wires":[["6bf7dcb2.b45944"]]},{"id":"6bf7dcb2.b45944","type":"change","z":"bf9e1e33.030598","name":"load files","rules":[{"t":"set","p":"files","pt":"msg","to":"files","tot":"flow"}],"action":"","property":"","from":"","to":"","reg":false,"x":230,"y":980,"wires":[["2d7e0d9c979f7bde"]]},{"id":"e4f12ff8.2a42b8","type":"change","z":"bf9e1e33.030598","name":"","rules":[{"t":"set","p":"files","pt":"flow","to":"[\"one.txt\",\"two.txt\",\"three.txt\"]","tot":"json"}],"action":"","property":"","from":"","to":"","reg":false,"x":520,"y":1200,"wires":[["6bf7dcb2.b45944"]]},{"id":"b8b5bcde.097d48","type":"change","z":"bf9e1e33.030598","name":"delete file","rules":[{"t":"set","p":"files","pt":"flow","to":"[([$flowContext(\"files\")])[$!=$$.deleteFile]]","tot":"jsonata"}],"action":"","property":"","from":"","to":"","reg":false,"x":730,"y":1060,"wires":[["6c5d7262.512e3c","6bf7dcb2.b45944"]]},{"id":"2d7e0d9c979f7bde","type":"ui_template","z":"bf9e1e33.030598","group":"67fa6f518a45aecb","name":"ui_temlplate - present download links on dashboard","order":1,"width":"6","height":"8","format":"<div><table>\n <tr>\n <th>Files</th><th></th><th></th>\n </tr>\n <tr ng-repeat=\"row in msg.files\">\n <td>{{row}}</td>\n <td> <a class=\"buttonDownload\" href=\"/files/{{row}}\" target=\"_blank\">Download</a></td>\n <td> <button class=\"buttonDelete\" ng-click=\"send({payload: row})\">delete</button></td>\n </tr>\n</table></div>\n<style>\n.buttonDownload {\n background-color: #4CAF50; /* Green */\n color: #000000;\n text-decoration: none;\n padding: 5px 10px 5px;\n }\n.buttonDelete {\n background-color: red; /* Green */\n color: #000000;\n text-decoration: none;\n padding: 5px 10px 5px;\n}\n.buttonDelete:hover, .buttonDownload:hover {\n background-color: blue; /* Green */\n color: white;\n} \n</style>\n","storeOutMessages":false,"fwdInMessages":false,"resendOnRefresh":true,"templateScope":"local","className":"","x":600,"y":980,"wires":[["d7ecc8e70ecf18d5","19c6fbdb.ff1c24"]],"info":"<script type=\"text/javascript\" charset=\"utf-8\">\n\n $( document ).on( \"click\", \"a.delete\", function() {\n \n var url = \"/delete/\" + $(this).parent().siblings('td:first').html();\n console.log(url)\n const xhttp = new XMLHttpRequest();\n xhttp.open(\"GET\", url);\n xhttp.send();\n }); \n\n</script>\n"},{"id":"56fadbd7.b1a614","type":"inject","z":"bf9e1e33.030598","name":"set files for testing","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":310,"y":1200,"wires":[["e4f12ff8.2a42b8"]]},{"id":"49b5aa122be0acec","type":"switch","z":"bf9e1e33.030598","name":"","property":"payload","propertyType":"msg","rules":[{"t":"eq","v":"OK","vt":"str"},{"t":"eq","v":"Cancel","vt":"str"}],"checkall":"true","repair":false,"outputs":2,"x":580,"y":1060,"wires":[["b8b5bcde.097d48"],[]]},{"id":"6c5d7262.512e3c","type":"debug","z":"bf9e1e33.030598","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","statusVal":"","statusType":"auto","x":750,"y":1120,"wires":[]},{"id":"d7ecc8e70ecf18d5","type":"debug","z":"bf9e1e33.030598","name":"","active":false,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","statusVal":"","statusType":"auto","x":730,"y":920,"wires":[]},{"id":"19c6fbdb.ff1c24","type":"change","z":"bf9e1e33.030598","name":"","rules":[{"t":"set","p":"deleteFile","pt":"msg","to":"payload","tot":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":250,"y":1060,"wires":[["b304b1ac8f5d9c15"]]},{"id":"b304b1ac8f5d9c15","type":"ui_toast","z":"bf9e1e33.030598","position":"dialog","displayTime":"","highlight":"","sendall":true,"outputs":1,"ok":"OK","cancel":"Cancel","raw":false,"className":"","topic":"Confirm to delete this file?","name":"Name","x":440,"y":1060,"wires":[["49b5aa122be0acec"]]},{"id":"67fa6f518a45aecb","type":"ui_group","name":"Humidity","tab":"ce5dd7b2afdbfd55","order":1,"disp":false,"width":"6","collapse":false,"className":"humidity"},{"id":"ce5dd7b2afdbfd55","type":"ui_tab","name":"Realtime Panel","icon":"mi-drag_indicator","order":1,"disabled":false,"hidden":false}]

```

[edit] Added the refresh of template and simulated file FS. Just replace the change nodes for FS nodes. Also some css for styling

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<div class="post-metadata">

### Author: ![Kai](https://avatars.discourse-cdn.com/v4/letter/k/cc9497/32.png) [@Kai](https://discourse.nodered.org/u/Kai)
#### Post date: [29 April 2022 11:54 UTC](https://discourse.nodered.org/t/duplicate-of-http-request/61954/6 "2022-04-29T11:54:57Z")

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it actually blow my mind as I thought event listener will be replaced by new listener upon node red re-deployed

thanks for sharing the information 🙏

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<div class="post-metadata">

### Author: ![Kai](https://avatars.discourse-cdn.com/v4/letter/k/cc9497/32.png) [@Kai](https://discourse.nodered.org/u/Kai)
#### Post date: [29 April 2022 11:57 UTC](https://discourse.nodered.org/t/duplicate-of-http-request/61954/7 "2022-04-29T11:57:33Z")

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thanks 👍 your solution are much simpler than mine

I will take some time to understand the concept