add: Preliminary support for flutter front-end calling rust back-end http request

flutter/lib/models/user_model.dart

@@ -9,6 +9,7 @@ import 'package:get/get.dart';
 import 'package:http/http.dart' as http;
 
 import '../common.dart';
+import '../utils/http_service.dart';
 import 'model.dart';
 import 'platform_model.dart';
 
@@ -135,8 +136,8 @@ class UserModel {
   /// throw [RequestException]
   Future<LoginResponse> login(LoginRequest loginRequest) async {
     final url = await bind.mainGetApiServer();
-    final resp = await http.post(Uri.parse('$url/api/login'),
-        headers: {'Content-Type': 'application/json'},
+    final resp = await HttpService().sendRequest(
+        '$url/api/login', HttpMethod.post,
         body: jsonEncode(loginRequest.toJson()));
 
     final Map<String, dynamic> body;

flutter/lib/utils/http_service.dart

@@ -0,0 +1,48 @@
+import 'dart:convert';
+import 'package:http/http.dart' as http;
+
+import '../models/platform_model.dart';
+
+enum HttpMethod { get, post, put, delete }
+
+class HttpService {
+  Future<http.Response> sendRequest(
+      String url,
+      HttpMethod method, {
+        Map<String, String>? headers,
+        dynamic body,
+      }) async {
+    headers ??= {'Content-Type': 'application/json'};
+    String headersJson = jsonEncode(headers);
+    String methodName = method.toString().split('.').last;
+
+    await bind.mainHttpRequest(url: url, method: methodName.toLowerCase(), body: body, header: headersJson);
+
+    var resJson = await _pollForResponse();
+    return _parseHttpResponse(resJson);
+  }
+
+  Future<String> _pollForResponse() async {
+    String responseJson = await bind.mainGetAsyncStatus();
+    while (responseJson == " ") {
+      await Future.delayed(const Duration(milliseconds: 100));
+      responseJson = await bind.mainGetAsyncStatus();
+    }
+    return responseJson;
+  }
+
+  http.Response _parseHttpResponse(String responseJson) {
+    try {
+      var parsedJson = jsonDecode(responseJson);
+      String body = parsedJson['body'];
+      Map<String, String> headers = {};
+      for (var key in parsedJson['headers'].keys) {
+        headers[key] = parsedJson['headers'][key];
+      }
+      int statusCode = parsedJson['status_code'];
+      return http.Response(body, statusCode, headers: headers);
+    } catch (e) {
+      throw Exception('Failed to parse response: $e');
+    }
+  }
+}

src/common.rs

@@ -1,3 +1,4 @@
+use serde_json::Value;
 use std::{
     borrow::Cow,
     future::Future,
@@ -1085,6 +1086,62 @@ pub async fn post_request_sync(url: String, body: String, header: &str) -> Resul
     post_request(url, body, header).await
 }
 
+#[tokio::main(flavor = "current_thread")]
+pub async fn http_request_sync(
+    url: String,
+    method: String,
+    body: String,
+    header: String,
+) -> ResultType<String> {
+    let http_client = create_http_client_async();
+    let mut http_client = match method.as_str() {
+        "get" => http_client.get(url),
+        "post" => http_client.post(url),
+        "put" => http_client.put(url),
+        "delete" => http_client.delete(url),
+        _ => return Err(anyhow!("The HTTP request method is not supported!")),
+    };
+    let v = serde_json::from_str(header.as_str())?;
+
+    if let Value::Object(obj) = v {
+        for (key, value) in obj.iter() {
+            http_client = http_client.header(key, value.as_str().unwrap_or_default());
+            println!("Key: {}, Value: {}", key, value);
+        }
+    } else {
+        return Err(anyhow!("HTTP header information parsing failed!"));
+    }
+
+    let response = http_client
+        .body(body)
+        .timeout(std::time::Duration::from_secs(12))
+        .send()
+        .await?;
+
+    // Serialize response headers
+    let mut response_headers = serde_json::map::Map::new();
+    for (key, value) in response.headers() {
+        response_headers.insert(
+            key.to_string(),
+            serde_json::json!(value.to_str().unwrap_or("")),
+        );
+    }
+
+    let status_code = response.status().as_u16();
+    let response_body = response.text().await?;
+
+    // Construct the JSON object
+    let mut result = serde_json::map::Map::new();
+    result.insert("status_code".to_string(), serde_json::json!(status_code));
+    result.insert(
+        "headers".to_string(),
+        serde_json::Value::Object(response_headers),
+    );
+    result.insert("body".to_string(), serde_json::json!(response_body));
+
+    // Convert map to JSON string
+    serde_json::to_string(&result).map_err(|e| anyhow!("Failed to serialize response: {}", e))
+}
 #[inline]
 pub fn make_privacy_mode_msg_with_details(
     state: back_notification::PrivacyModeState,

src/flutter_ffi.rs

@@ -874,9 +874,8 @@ pub fn main_get_api_server() -> String {
     get_api_server()
 }
 
-// This function doesn't seem to be used.
-pub fn main_post_request(url: String, body: String, header: String) {
-    post_request(url, body, header)
+pub fn main_http_request(url: String, method: String, body: String, header: String) {
+    http_request(url,method, body, header)
 }
 
 pub fn main_get_local_option(key: String) -> SyncReturn<String> {

src/ui.rs

@@ -548,6 +548,10 @@ impl UI {
         change_id_shared(id, old_id);
     }
 
+    fn http_request(&self, url: String, method: String, body: String, header: String) {
+        http_request(url, method, body, header)
+    }
+
     fn post_request(&self, url: String, body: String, header: String) {
         post_request(url, body, header)
     }

src/ui_interface.rs

@@ -708,6 +708,18 @@ pub fn change_id(id: String) {
     });
 }
 
+#[inline]
+pub fn http_request(url: String, method: String, body: String, header: String) {
+    *ASYNC_JOB_STATUS.lock().unwrap() = " ".to_owned();
+    std::thread::spawn(move || {
+        *ASYNC_JOB_STATUS.lock().unwrap() =
+            match crate::http_request_sync(url, method, body, header) {
+                Err(err) => err.to_string(),
+                Ok(text) => text,
+            };
+    });
+}
+
 #[inline]
 pub fn post_request(url: String, body: String, header: String) {
     *ASYNC_JOB_STATUS.lock().unwrap() = " ".to_owned();