Flutter：为Http GET请求发送JSON正文

本文介绍了Flutter：为Http GET请求发送JSON正文的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我需要从Flutter应用向API发出GET请求，该请求要求请求主体为JSON（原始）。

I need to make a GET request to an API from my Flutter app which requires request body as JSON (raw).

我使用JSON请求主体测试了API

I tested the API with JSON request body in Postman and it seems to be working fine.

现在在Flutter应用程序上，我正在尝试执行相同的操作：

Now on my Flutter application I am trying to do the same thing:

_fetchDoctorAvailability() async { var params = { "doctor_id": "DOC000506", "date_range": "25/03/2019-25/03/2019" , "clinic_id":"LAD000404" }; Uri uri = Uri.parse("theapiiamcalling:8000"); uri.replace(queryParameters: params); var response = await http.get(uri, headers: { "Authorization": Constants.APPOINTMENT_TEST_AUTHORIZATION_KEY, HttpHeaders.contentTypeHeader: "application/json", "callMethod" : "DOCTOR_AVAILABILITY" }); print('---- status code: ${response.statusCode}'); var jsonData = json.decode(response.body); print('---- slot: ${jsonData}'); }

但是API给我一个错误提示

However the API gives me an error saying

{消息：缺少输入json。，状态：false}

{message: Missing input json., status: false}

如何

推荐答案

，该如何在Flutter中为Http GET请求发送原始（或JSON）请求正文？ uri.replace ... 返回新的 Uri ，因此您必须将其分配给新变量或直接用于 get 函数。

uri.replace... returns a new Uri, so you have to assign it into a new variable or use directly into the get function.

final newURI = uri.replace(queryParameters: params); var response = await http.get(newURI, headers: { "Authorization": Constants.APPOINTMENT_TEST_AUTHORIZATION_KEY, HttpHeaders.contentTypeHeader: "application/json", "callMethod" : "DOCTOR_AVAILABILITY" });

使用帖子：

var params = { "doctor_id": "DOC000506", "date_range": "25/03/2019-25/03/2019" , "clinic_id":"LAD000404" }; var response = await http.post("theapiiamcalling:8000", body: json.encode(params) ,headers: { "Authorization": Constants.APPOINTMENT_TEST_AUTHORIZATION_KEY, HttpHeaders.contentTypeHeader: "application/json", "callMethod" : "DOCTOR_AVAILABILITY" });