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400 BAD request HTTP error code meaning? - Stack Overflow A 400 means that the request was malformed In other words, the data stream sent by the client to the server didn't follow the rules In the case of a REST API with a JSON payload, 400's are typically, and correctly I would say, used to indicate that the JSON is invalid in some way according to the API specification for the service
java - How to respond with an HTTP 400 error in a Spring MVC . . . Change your return type to ResponseEntity<>, and then you can use the below for 400: return new ResponseEntity<>(HttpStatus BAD_REQUEST); And for a correct request: return new ResponseEntity<>(json,HttpStatus OK); After Spring 4 1 there are helper methods in ResponseEntity which could be used as:
post - OpenAI Chat Completions API error 400: Bad Request (migrating . . . Apart from what is in the accepted answer, there are many other cases where a 400 could happen because of validation issues For example, I got 400 (from the chat completion API) and the issue was, the username I specified had a in it message: "'asdf hjkl' does not match '^[a-zA-Z0-9_-]{1,64}$' - 'messages 2 name'"
java - Server returned HTTP response code: 400 - Stack Overflow These caused java io IOException Server returned HTTP response code: 400 in the following code: java net URL url = new URL(urlString); java io InputStream in = url openStream(); If you copy the above url and paste in browser, you will realize that browser adds '%20' for the spaces
rest - How do I get the body of a web request that returned 400 Bad . . . When I get 400 back, I know the body give me json back The response even says it's json (ContentType : application json); however the content length is discouraging (ContentLength : -1) I'm pretty persistent, but the json is dropped by PowerShell Tested through v5 0 on Win10 Pro :(–
Why HTTP POST returns code 400 (bad request)? HTTP POST Method A 400 means that the request was malformed In other words, the data stream sent by the client to the server didn't follow the rules (which is true in this example because POST was not defined) – Jacob