blocks|key|1232026|text|uri.replace...返回一个新的Uri，所以您必须将它赋值给一个新变量，或者直接用于get函数。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1232027|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"
});|code-block|syntax|javascript|1232028|使用员额：|1232029|++++++var+params+=+{
++++++++"doctor_id":+"DOC000506",
++++++++"date_range":+"25/03/2019-25/03/2019"+,
++++++++"clinic_id":"LAD000404"
++++++};

++++++var+response+=+await+http.post("http://theapiiamcalling:8000",+
++++++body:+json.encode(params)
++++++,headers:+{
++++++++"Authorization":+Constants.APPOINTMENT_TEST_AUTHORIZATION_KEY,
++++++++HttpHeaders.contentTypeHeader:+"application/json",
++++++++"callMethod"+:+"DOCTOR_AVAILABILITY"
++++++});|1232030|entityMap^0|0|E|K|3|1A|3|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]|$9|T|A|U|B|C]|$9|V|A|W|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|Y|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|Z|8|@]|D|@]|E|$I|J]]|$1|O|3|-4|5|6|7|10|8|@]|D|@]|E|$]]]|P|$]]

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

<pre><code>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"
});
</code></pre>

using post:

<pre><code> var params = {
 "doctor_id": "DOC000506",
 "date_range": "25/03/2019-25/03/2019" ,
 "clinic_id":"LAD000404"
 };

 var response = await http.post("http://theapiiamcalling:8000", 
 body: json.encode(params)
 ,headers: {
 "Authorization": Constants.APPOINTMENT_TEST_AUTHORIZATION_KEY,
 HttpHeaders.contentTypeHeader: "application/json",
 "callMethod" : "DOCTOR_AVAILABILITY"
 });
</code></pre>

blocks|key|1232055|text|到达|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1232056|GET请求不是用来向服务器发送数据的(而是看看这个)。这就是为什么http.dart+get方法没有body参数的原因。但是，当您想要指定从服务器获得什么时，有时需要包含查询参数，这是一种数据形式。查询参数是键值对，因此可以将它们作为如下所示的映射：|offset|length|style|CODE|1232057|final+queryParameters+=+{
++'name':+'Bob',
++'age':+'87',
};
final+uri+=+Uri.http('www.example.com',+'/path',+queryParameters);
final+headers+=+{HttpHeaders.contentTypeHeader:+'application/json'};
final+response+=+await+http.get(uri,+headers:+headers);|code-block|syntax|javascript|1232058|帖子|1232059|与GET请求不同，POST请求用于发送正文中的数据。你可以这样做：|1232060|final+body+=+{
++'name':+'Bob',
++'age':+'87',
};
final+jsonString+=+json.encode(body);
final+uri+=+Uri.http('www.example.com',+'/path');
final+headers+=+{HttpHeaders.contentTypeHeader:+'application/json'};
final+response+=+await+http.post(uri,+headers:+headers,+body:+jsonString);|1232061|注意，参数是Dart端的Map。然后，通过json.encode()函数从dart:convert库将它们转换为JSON字符串。那根绳子就是柱子的身体。|1232062|因此，如果服务器要求您在GET请求体中传递数据，请再次检查。虽然以这种方式设计服务器是可能的，但这是不标准的。|1232063|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/978061/http-get-with-request-body^0|0|X|9|17|3|1E|4|L|4|0|0|0|0|0|0|L|D|11|C|0|0^^$0|@$1|2|3|4|5|6|7|14|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|15|8|@$D|16|E|17|F|G]|$D|18|E|19|F|G]|$D|1A|E|1B|F|G]]|9|@$D|1C|E|1D|1|1E]]|A|$]]|$1|H|3|I|5|J|7|1F|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|1G|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|1H|8|@]|9|@]|A|$]]|$1|Q|3|R|5|J|7|1I|8|@]|9|@]|A|$K|L]]|$1|S|3|T|5|6|7|1J|8|@$D|1K|E|1L|F|G]|$D|1M|E|1N|F|G]]|9|@]|A|$]]|$1|U|3|V|5|6|7|1O|8|@]|9|@]|A|$]]|$1|W|3|-4|5|6|7|1P|8|@]|9|@]|A|$]]]|X|$Y|$5|Z|10|11|A|$12|13]]]]

<h2>GET</h2>
GET requests are not intended for sending data to the server (but <a href="https://stackoverflow.com/questions/978061/http-get-with-request-body">see this</a>). That's why the <code>http.dart</code> <code>get</code> method doesn't have a <code>body</code> parameter. However, when you want to specify what you are getting from the server, sometimes you need to include query parameters, which is a form of data. The query parameters are key-value pairs, so you can include them as a map like this:
<pre><code>final queryParameters = {
 'name': 'Bob',
 'age': '87',
};
final uri = Uri.http('www.example.com', '/path', queryParameters);
final headers = {HttpHeaders.contentTypeHeader: 'application/json'};
final response = await http.get(uri, headers: headers);
</code></pre>
<h2>POST</h2>
Unlike GET requests, POST requests are intended for sending data in the body. You can do it like this:
<pre><code>final body = {
 'name': 'Bob',
 'age': '87',
};
final jsonString = json.encode(body);
final uri = Uri.http('www.example.com', '/path');
final headers = {HttpHeaders.contentTypeHeader: 'application/json'};
final response = await http.post(uri, headers: headers, body: jsonString);
</code></pre>
Note that the parameters were a Map on the Dart side. Then they were converted to a JSON string by the <code>json.encode()</code> function from the <code>dart:convert</code> library. That string is the POST body.
So if the server is asking you to pass it data in a GET request body, check again. While it is possible to design a server in this way, it isn't standard.

blocks|key|2782636|text|如果您想通过下面的示例通过GET请求发送复杂/嵌套的数据，可以使用我在github+https://github.com/opatajoshua/SimplifiedUri上创建的一个简单类|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2782637|final+params+=+{
++'name':+'John',
++'columns':+['firstName',+'lastName'],
++'ageRange':+{
++++'from':+12,
++++'to':+60,
++},
++'someInnerArray':+[1,2,3,5]
};
final+Uri+uri+=+SimplifiedUri.uri('http://api.mysite.com/users',+params);
final+headers+=+{HttpHeaders.contentTypeHeader:+'application/json'};
final+response+=+await+http.get(uri,+headers:+headers);|code-block|syntax|javascript|2782638|输出|2782639|http://api.mysite.com/users?name=John&columns%255B%255D=firstName&columns%255B%255D=lastName&ageRange%255Bfrom%255D=12&ageRange%255Bto%255D=60&someInnerArray%255B%255D=1&someInnerArray%255B%255D=2&someInnerArray%255B%255D=3&someInnerArray%255B%255D=5|2782640|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/opatajoshua/SimplifiedUri^0|16|18|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@$A|V|B|W|1|X]]|C|$]]|$1|D|3|E|5|F|7|Y|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|Z|8|@]|9|@]|C|$]]|$1|K|3|L|5|F|7|10|8|@]|9|@]|C|$G|H]]|$1|M|3|-4|5|6|7|11|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]]]

if you want to send complex/nested data through a GET request like the sample below, you can use a simple class i created on github
<a href="https://github.com/opatajoshua/SimplifiedUri" rel="nofollow noreferrer">https://github.com/opatajoshua/SimplifiedUri</a>
<pre><code>final params = {
 'name': 'John',
 'columns': ['firstName', 'lastName'],
 'ageRange': {
 'from': 12,
 'to': 60,
 },
 'someInnerArray': [1,2,3,5]
};
final Uri uri = SimplifiedUri.uri('http://api.mysite.com/users', params);
final headers = {HttpHeaders.contentTypeHeader: 'application/json'};
final response = await http.get(uri, headers: headers);
</code></pre>
output
<pre><code>http://api.mysite.com/users?name=John&amp;columns%5B%5D=firstName&amp;columns%5B%5D=lastName&amp;ageRange%5Bfrom%5D=12&amp;ageRange%5Bto%5D=60&amp;someInnerArray%5B%5D=1&amp;someInnerArray%5B%5D=2&amp;someInnerArray%5B%5D=3&amp;someInnerArray%5B%5D=5

</code></pre>

blocks|key|2782690|text|您可以按以下方式使用请求类：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2782691|var+request+=+http.Request(
++'GET',
++Uri.parse("http://theapiiamcalling:8000"),
)..headers.addAll({
++++"Authorization":+Constants.APPOINTMENT_TEST_AUTHORIZATION_KEY,
++++HttpHeaders.contentTypeHeader:+"application/json",
++++"callMethod":+"DOCTOR_AVAILABILITY",
++});
var+params+=+{
++"doctor_id":+"DOC000506",
++"date_range":+"25/03/2019-25/03/2019",
++"clinic_id":+"LAD000404"
};
request.body+=+jsonEncode(params);
http.StreamedResponse+response+=+await+request.send();
print(response.statusCode);
print(await+response.stream.bytesToString());|code-block|syntax|javascript|2782692|另外，请注意，邮递员可以使用超过15种语言的将API请求转换为代码片段。如果选择Dart，您将发现与上面类似的代码。|2782693|entityMap|0|LINK|mutability|MUTABLE|url|https://pub.dev/documentation/http/latest/http/Request-class.html|1|https://learning.postman.com/docs/sending-requests/generate-code-snippets/^0|A|2|0|0|0|M|D|1|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@$A|V|B|W|1|X]]|C|$]]|$1|D|3|E|5|F|7|Y|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|Z|8|@]|9|@$A|10|B|11|1|12]]|C|$]]|$1|K|3|-4|5|6|7|13|8|@]|9|@]|C|$]]]|L|$M|$5|N|O|P|C|$Q|R]]|S|$5|N|O|P|C|$Q|T]]]]

You can use <a href="https://pub.dev/documentation/http/latest/http/Request-class.html" rel="nofollow noreferrer">Request</a> class as following:
<pre><code>var request = http.Request(
 'GET',
 Uri.parse(&quot;http://theapiiamcalling:8000&quot;),
)..headers.addAll({
 &quot;Authorization&quot;: Constants.APPOINTMENT_TEST_AUTHORIZATION_KEY,
 HttpHeaders.contentTypeHeader: &quot;application/json&quot;,
 &quot;callMethod&quot;: &quot;DOCTOR_AVAILABILITY&quot;,
 });
var params = {
 &quot;doctor_id&quot;: &quot;DOC000506&quot;,
 &quot;date_range&quot;: &quot;25/03/2019-25/03/2019&quot;,
 &quot;clinic_id&quot;: &quot;LAD000404&quot;
};
request.body = jsonEncode(params);
http.StreamedResponse response = await request.send();
print(response.statusCode);
print(await response.stream.bytesToString());
</code></pre>
Also, note that Postman that can <a href="https://learning.postman.com/docs/sending-requests/generate-code-snippets/" rel="nofollow noreferrer">convert an API request into a code snippet</a> in more than 15 languages. If you select Dart, you will find a similar code to above.

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

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

<a href="https://i.stack.imgur.com/4496D.png" rel="noreferrer"><img src="https://i.stack.imgur.com/4496D.png" alt="enter image description here"></a>

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

<pre><code>_fetchDoctorAvailability() async {
 var params = {
 "doctor_id": "DOC000506",
 "date_range": "25/03/2019-25/03/2019" ,
 "clinic_id":"LAD000404"
 };

 Uri uri = Uri.parse("http://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}');
}
</code></pre>

However the API gives me an error saying 

<blockquote>
 {message: Missing input json., status: false}
</blockquote>

How do I send a raw (or rather JSON) request body for Http GET request in Flutter?

Flutter: Send JSON body for Http GET request

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我需要从我的颤振应用程序中向API发出一个GET请求，该应用程序要求请求体为JSON (raw)。我在Postman中用JSON请求体测试了API，它似乎运行得很好。​​现在，在我的颤振应用程序中，我试图做同样的事情：_fetchDoctorAvailability() async {    var params = ...

问为Http请求发送JSON主体
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问为Http请求发送JSON主体EN