first commit

历届学生/front-end-team-10/项目练习/上课项目/失物招领/js/http/index.js

@@ -0,0 +1,56 @@
+class Http {
+
+    constructor() {
+        this.xhr = new XMLHttpRequest();
+    }
+
+    get(params) {
+        return new Promise((success, error) => {
+            var par = ""
+            for (const key in params.data) {
+                par += `&${key}=${params.data[key]}`
+            }
+            par = par.replace("&", "?")
+            this.xhr.open("GET", `${config.switchStage()}${params.url}${par}`)
+            this.xhr.send()
+
+            this.ReadyState(success, error)
+        })
+    }
+
+    post(params) {
+        return new Promise((success, error) => {
+            this.xhr.open("POST", `${config.switchStage()}${params.url}`)
+            this.xhr.setRequestHeader('Content-Type', 'application/json');
+            this.xhr.send(JSON.stringify(params.data))
+            this.ReadyState(success, error)
+        })
+    }
+
+
+    ReadyState(success, error) {
+        this.xhr.onreadystatechange = () => {
+            if (this.xhr.readyState == 4) {
+                if (this.xhr.status == 200) {
+                    var data = JSON.parse(this.xhr.response);
+                    switch (data.status) {
+                        case 200:
+                            success(data.result)
+                            break;
+
+                        case 404:
+                            alert(data.msg);
+                            throw new Error(data.msg)
+                            break;
+
+                        default:
+                            break;
+                    }
+                    
+                } else {
+                    error(this.xhr)
+                }
+            }
+        }
+    }
+}