json - 带有 json 正文的 Swift GET 请求

Question

我正在关注 API 文档，其中端点期望 GET 请求中的 JSON 正文。 curl 示例如下:

curl -i -b /cookie.txt -H "Content-Type: application/json" -X GET -d "{\"groups\": [{\"groupId\":\"1\"}],\"originatorId\": \"2\",\"schedule\": \"1234564334\",\"shortenedLink\": \"http://\",\"linkMessage\": \"Click on this to be directed to\",\"messageTips\": [{\"date\": \"12/12/2018\",\"time\": \"16:00\",\"venue\": \"chelt\",\"odds\": \"3/1\",\"betEntityName\": \"Dobbin\",\"bet\": \"10\",\"messageText\": \"Lorem ipsum dolor sit amet, consectetur adipiscing elit\"}, {\"date\": \"12/12/2018\",\"time\": \"17:00\",\"venue\": \"york\",\"odds\": \"3/1\",\"betEntityName\": \"Bobbin\",\"bet\": \"20\",\"messageText\": \"Lorem ipsum dolor sit amet, consectetur adipiscing elit\"}]}"

我在 swift 中使用了以下代码，但服务器给出了以下错误:

{"timestamp":1519328960600,"status":400,"error":"Bad Request","exception":"org.springframework.http.converter.HttpMessageNotReadableException","message":"Required request body is missing: public org.springframework.http.ResponseEntity

func test() {
    let requestUrl: URL = URL(string: "\(serverEP)/statistics")!

    var urlRequest = URLRequest(url: requestUrl)
    urlRequest.httpMethod = "GET"
    urlRequest.setValue("ID=\(defaults.string(forKey: "cookie")!)", forHTTPHeaderField: "Cookie")
    urlRequest.httpShouldHandleCookies = true
    urlRequest.timeoutInterval = 3

    let postString = "{\"groups\":\"test\"}"

    urlRequest.httpBody = postString.data(using: .utf8)

    let task = URLSession.shared.dataTask(with: urlRequest) { (data, response, error) in
        if error == nil {
            if let data = data,
                let html = String(data: data, encoding: String.Encoding.utf8) {
                print(html)
            }
        }
    }
    task.resume()
}

如何在 GET 请求的正文中包含 JSON？

Answer 1

GET 请求没有正文，如果您在 GET 请求中使用正文，则您不遵守 HTTP 1.1 规范:

https://www.rfc-editor.org/rfc/rfc2616#section-4.3

https://www.rfc-editor.org/rfc/rfc2616#section-9.3