# 501 error for httpPost **URL:** \ **Category:** Ignition\ **Created:** [July 5, 2023, 9:49am UTC](https://forum.inductiveautomation.com/t/501-error-for-httppost/75924 "2023-07-05T09:49:19Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![Learner\_Ignition](https://avatars.discourse-cdn.com/v4/letter/l/b3f665/32.png) [@Learner\_Ignition](https://forum.inductiveautomation.com/u/Learner_Ignition)\ **Post date:** [July 5, 2023, 9:49am UTC](https://forum.inductiveautomation.com/t/501-error-for-httppost/75924/1 "2023-07-05T09:49:19Z")
Hi, As a learner I am trying to implement [httpPost Example](https://docs.inductiveautomation.com/display/DOC81/httpPost+Example) However after copying pasting and doing some modification also I am getting ![Error](https://us1.discourse-cdn.com/inductiveautomation/original/3X/d/c/dcd64430d93a5fca24064a35ba40a959aae6204a.jpeg) 501 error. I am trying to send the Json data by after clicking on button and then in Webdev trying to get data into variable. ![script](https://us1.discourse-cdn.com/inductiveautomation/original/3X/0/8/08c65e339e13773771576bfc53bc1e1f96ae7643.jpeg) ---
**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\ **Post date:** [July 5, 2023, 12:14pm UTC](https://forum.inductiveautomation.com/t/501-error-for-httppost/75924/2 "2023-07-05T12:14:46Z")
That generally means your WebDev script threw an exception. Showing that in the web result would be insecure. Look in your gateway logs. Or, perhaps, add logging and `try:` - `except:` blocks in your WebDev jython. ---
**Author:** ![victordcq](https://avatars.discourse-cdn.com/v4/letter/v/f6c823/32.png) [@victordcq](https://forum.inductiveautomation.com/u/victordcq)\ **Post date:** [July 5, 2023, 12:25pm UTC](https://forum.inductiveautomation.com/t/501-error-for-httppost/75924/3 "2023-07-05T12:25:31Z")
show us the webdev post code in web 501 generaly means it doesnt exists ( Test1 is a wrong name/method?), idk if igntions throws this for something else too tho ---
**Author:** ![pascal.fragnoud](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pascal.fragnoud/32/24728_2.png) [@pascal.fragnoud](https://forum.inductiveautomation.com/u/pascal.fragnoud)\ **Post date:** [July 5, 2023, 12:25pm UTC](https://forum.inductiveautomation.com/t/501-error-for-httppost/75924/4 "2023-07-05T12:25:54Z")
What's in your `Test1` webdev script exactly ? Did you make sure to set its method to `POST` ? ---
**Author:** ![Learner\_Ignition](https://avatars.discourse-cdn.com/v4/letter/l/b3f665/32.png) [@Learner\_Ignition](https://forum.inductiveautomation.com/u/Learner_Ignition)\ **Post date:** [July 6, 2023, 3:32am UTC](https://forum.inductiveautomation.com/t/501-error-for-httppost/75924/5 "2023-07-06T03:32:19Z")
![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/1/e/1e8775f3ae74dc9fccbc0753362ef5dec49c8ce1.png) I have attached Test1 Webdev script ---
**Author:** ![Daniel\_Arekion](https://avatars.discourse-cdn.com/v4/letter/d/41988e/32.png) [@Daniel\_Arekion](https://forum.inductiveautomation.com/u/Daniel_Arekion)\ **Post date:** [December 6, 2023, 6:54am UTC](https://forum.inductiveautomation.com/t/501-error-for-httppost/75924/6 "2023-12-06T06:54:29Z")
Getting same error here. Did you manage to solve it? ---
**Author:** ![Hayden\_Watson](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/hayden_watson/32/48792_2.png) [@Hayden\_Watson](https://forum.inductiveautomation.com/u/Hayden_Watson)\ **Post date:** [December 6, 2023, 8:12am UTC](https://forum.inductiveautomation.com/t/501-error-for-httppost/75924/7 "2023-12-06T08:12:29Z")
Normally an exception in your code, if I had to guess in the above, the `request["postData"]` was the issue as I think the correct dict key is `request["data"]`. ---
**Author:** ![Learner\_Ignition](https://avatars.discourse-cdn.com/v4/letter/l/b3f665/32.png) [@Learner\_Ignition](https://forum.inductiveautomation.com/u/Learner_Ignition)\ **Post date:** [December 6, 2023, 9:01am UTC](https://forum.inductiveautomation.com/t/501-error-for-httppost/75924/8 "2023-12-06T09:01:37Z")
This worked for me. ```auto def doPost(request, session): data = request["postData"] response_data = data[0][0]["val"] system.tag.writeBlocking(["[Test_Tag_Provider]Test/Recipe1"], [response_data]) response_json = system.util.jsonEncode(response_data) return {"response": response_json, "contentType": "application/json"} ```