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I have a RequestMapping setup in a spring @Controller and I am unable to correctly send a CURL request to it. I keep getting a HTTP 400 return code when trying to send various ways. I am not sure what is setup incorrectly.

Here is the request

curl -v -X POST localhost:8082/api/registerDevice -d '{"serial":"FA541YJ05065"}' -H "Content-Type:application/json;charset=UTF-8"

Here is the output

Note: Unnecessary use of -X or --request, POST is already inferred.
*   Trying ::1...
* Connected to localhost (::1) port 8082 (#0)
> POST /api/registerDevice HTTP/1.1
> Host: localhost:8082
> User-Agent: curl/7.49.0
> Accept: */*
> Content-Type:application/json;charset=UTF-8
> Content-Length: 23
>
* upload completely sent off: 23 out of 23 bytes
< HTTP/1.1 400 Bad Request
< Server: Apache-Coyote/1.1
< Content-Type: application/json;charset=UTF-8
< Transfer-Encoding: chunked
< Date: Thu, 16 Jun 2016 02:48:50 GMT
< Connection: close
<
{"timestamp":1466045330556,"status":400,"error":"Bad Request","exception":"org.springframework.http.converter.HttpMessageNotReadableException","message":"Could not read document: Unexpected character (''' (code 39)): expected a valid value (number, String, array, object, 'true', 'false' or 'null')\n at [Source: java.io.PushbackInputStream@3bae0839; line: 1, column: 2]; nested exception is com.fasterxml.jackson.core.JsonParseException: Unexpected character (''' (code 39)): expected a valid value (number, String, array, object, 'true', 'false' or 'null')\n at [Source: java.io.PushbackInputStream@3bae0839; line: 1, column: 2]","path":"/api/registerDevice"}* Closing connection 0

Spring RequestMapping

 @RequestMapping(value = "registerDevice", method = RequestMethod.POST)
  public ResponseEntity<String> registerDevice(@RequestBody Map<String, Object> payload) throws Exception {

Update

As mentioned below it was an issue with escaping the quotes and related to windows. The same CURL command worked fine on centos.

curl -v -H "Accept: application/json" -H "Content-type: application/json" -X POST -d "{"""serial""":"""FA541YJ05065"""}" http://localhost:8082/api/deregisterDevice

On Centos

curl -v -H "Accept: application/json" -H "Content-type: application/json" -X POST -d '{"serial":"FA541YJ05065"}' http://localhost:8082/api/registerDevice
ALM
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2 Answers2

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The only reason behind this is that fact that your request is not formatted correctly Check out this Spring 4.x/3.x (Web MVC) REST API and JSON2 Post requests, how to get it right once for all? for more information.

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Tomz
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0

I suspect that you end up sending ' at the start of the json. You can try using double quotes around the json and escaping them in it. See also

curl -v -X POST localhost:8082/api/registerDevice -d "{\"serial\":\"FA541YJ05065\"}" -H "Content-Type:application/json;charset=UTF-8"
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Andrei Bardyshev
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  • Yes it turns out the issue was on Windows. It works fine on our centos system but windows was requiring the data to be escaped. curl -v -H "Accept: application/json" -H "Content-type: application/json" -X POST -d "{"""serial""":"""FA541YJ05065"""}" http://localhost:8082/api/deregisterDevice On Centos curl -v -H "Accept: application/json" -H "Content-type: application/json" -X POST -d '{"serial":"FA541YJ05065"}' http://localhost:8082/api/registerDevice – ALM Jun 16 '16 at 14:52