Problems with Go post json

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Want to write a client with go, send a JSON data to the Java server interface,

As a result, the body received by Java is always empty, but the server written by Python is ok

Online Search method

Which: Some of the methods have been tried,

Type requestbody struct {

status String ' JSON: ' status '

Region []string ' JSON: ' Region '

Percent string ' JSON: ' Percent '

task_id string ' JSON: ' task_id '

}

B, err: = json. Marshal (Rbody)

Body: = bytes. Newbuffer ([]byte (b))

(1)

RESP, err: = http. Post (URL, "Application/json", body)

(2)

RESP, err: = http. Post (URL, "application/x-www-form-urlencoded", body)

(3)

Client: = &http. client{}

Req, _: = http. Newrequest ("POST", url, body)

Req. Header.set ("Content-type", "Application/json")

RESP, err: = client. Do (req)

Not at all, and finally, try and

Req, _: = http. Newrequest ("POST", url, body)

Switch

Req, _: = http. Newrequest ("POST", URL, strings. Newreader (string (b)))

Okay, OK.