完成上传页面主要逻辑，网络问题仍未解决

2021-07-26 01:33:30 +08:00 · 2021-07-26 01:33:30 +08:00 · 46ef0f174c
--- a/.gitignore
+++ b/.gitignore
@ -21,3 +21,5 @@
 npm-debug.log*
 yarn-debug.log*
 yarn-error.log*
+
+env.json
--- a/README.md
+++ b/README.md
@ -1 +1,4 @@
-#inMyHeartFrontEnd
+# inMyHeartFrontEnd
+
+# 开发或编译前
+请根据`env.example.json`的格式按照自己的需求编写`env.json`，或者直接运行`cp env.example.json env.json`，否则无法通过编译！
--- a/package.json
+++ b/package.json
@ -3,7 +3,9 @@
  "version": "0.1.0",
  "private": true,
  "dependencies": {
+    "axios": "^0.21.1",
    "cra-template": "1.1.2",
+    "dotenv": "^10.0.0",
    "react": "^17.0.2",
    "react-dom": "^17.0.2",
    "react-dropzone": "^11.3.4",
--- a/src/App.css
+++ b/src/App.css
@ -6,10 +6,19 @@ a.btn {
  border-radius: .5rem;
  padding: .375rem 1.75rem;
  font-size: 1.1rem;
+  cursor: pointer;
+  transition: filter .3s ease-out;
+}
+.btn:disabled {
+  cursor: not-allowed;
+  filter: grayscale(100%);
 }
 .btn:active {
  color: white !important;
 }
+.btn:hover {
+  filter: brightness(1.2);
+}

 button.btn {
  border: none;
@ -17,4 +26,18 @@ button.btn {

 .btn-primary {
  background-color: #318ffb;
+}
+.btn-ok {
+  background-color: #47c74c;
+}
+.btn-gray {
+  background-color: #d9d9d9;
+}
+
+.btn-circle {
+  border-radius: 50%;
+  width: 40px;
+  height: 40px;
+  padding: 8px;
+  box-shadow: 1px 1px 4px 0 #0003;
 }
--- a/src/components/Spinner/Spinner.js
+++ b/src/components/Spinner/Spinner.js
@ -0,0 +1,17 @@
+import './spinner.css';
+
+export default function Spinner(props) {
+  return (
+    <div className="spinner">
+      <svg viewBox="0 0 1027 1024" version="1.1" xmlns="http://www.w3.org/2000/svg">
+        <path d="M101.725953 198.235466m48.271823-48.271823l0 0q48.271823-48.271823 96.543646 0l144.815469 144.815468q48.271823 48.271823 0 96.543646l0 0q-48.271823 48.271823-96.543646 0l-144.815469-144.815468q-48.271823-48.271823 0-96.543646Z" fill="#FFFD"></path>
+        <path d="M341.367467 443.733333m0 68.266667l0 0q0 68.266667-68.266667 68.266667l-204.8 0q-68.266667 0-68.266667-68.266667l0 0q0-68.266667 68.266667-68.266667l204.8 0q68.266667 0 68.266667 68.266667Z" fill="#FFFC"></path>
+        <path d="M343.085068 584.40542m48.271823 48.271823l0 0q48.271823 48.271823 0 96.543646l-144.815469 144.815468q-48.271823 48.271823-96.543646 0l0 0q-48.271823-48.271823 0-96.543646l144.815469-144.815468q48.271823-48.271823 96.543646 0Z" fill="#FFFB"></path>
+        <path d="M443.767467 682.666667m68.266666 0l0 0q68.266667 0 68.266667 68.266666l0 204.8q0 68.266667-68.266667 68.266667l0 0q-68.266667 0-68.266666-68.266667l0-204.8q0-68.266667 68.266666-68.266666Z" fill="#FFFA"></path>
+        <path d="M584.439553 680.949066m48.271823-48.271823l0 0q48.271823-48.271823 96.543646 0l144.815469 144.815468q48.271823 48.271823 0 96.543646l0 0q-48.271823 48.271823-96.543646 0l-144.815469-144.815468q-48.271823-48.271823 0-96.543646Z" fill="#FFF9"></path>
+        <path d="M1024.034133 443.733333m0 68.266667l0 0q0 68.266667-68.266666 68.266667l-204.8 0q-68.266667 0-68.266667-68.266667l0 0q0-68.266667 68.266667-68.266667l204.8 0q68.266667 0 68.266666 68.266667Z" fill="#FFF8"></path>
+        <path d="M825.798668 101.69182m48.271823 48.271823l0 0q48.271823 48.271823 0 96.543646l-144.815469 144.815468q-48.271823 48.271823-96.543646 0l0 0q-48.271823-48.271823 0-96.543646l144.815469-144.815468q48.271823-48.271823 96.543646 0Z" fill="#FFF7"></path>
+        <path d="M443.767467 0m68.266666 0l0 0q68.266667 0 68.266667 68.266667l0 204.8q0 68.266667-68.266667 68.266666l0 0q-68.266667 0-68.266666-68.266666l0-204.8q0-68.266667 68.266666-68.266667Z" fill="#FFF6"></path></svg>
+    </div>
+  );
+}
--- a/src/components/Spinner/spinner.css
+++ b/src/components/Spinner/spinner.css
@ -0,0 +1,19 @@
+.spinner {
+  width: 20px;
+  height: 20px;
+  margin: 0 auto;
+}
+.spinner > svg {
+  width: 100%;
+  height: 100%;
+  animation: spin 1s steps(8, start) infinite;
+}
+
+@keyframes spin {
+  from {
+    transform: rotate(0deg);
+  }
+  to {
+    transform: rotate(360deg);
+  }
+}
--- a/src/components/UploadUnit/UploadUnit.js
+++ b/src/components/UploadUnit/UploadUnit.js
@ -1,33 +1,62 @@
 import './upload.css';

-import { Component } from "react";
-import { apis } from '../../resources.json';
-
+import { Component, Fragment } from "react";
+import { apis } from '../../helper/apis';
+import Spinner from '../Spinner/Spinner';

 export default class UploadUnit extends Component {
-  toBlobPromise = null;
-
  constructor(props) {
    super(props);
    this.state = {
-      // 0: loading, 1: loaded, 2: compressing, 3: uploading, 4: uploaded
-      status: 0,
-      src: null
+      // 0: loading, 1: compressing, 2: compressed, 3: uploading, 4: uploaded
+      status: -1,
+      src: null,
+      file: null,
+      progress: 0,
+      width: 0
    };
+    this.upload = this.upload.bind(this);
+    this.handleCancel = this.handleCancel.bind(this);
  }

-  selected(file) {
-    if (file) {
-      if (!["image/jpeg", "image/png", "image/gif"].includes(file.type))
-        return alert('请不要上传jpg、png、gif格式以外的文件！')
-      let reader = new FileReader();
+  componentDidMount() {
+    setTimeout(() => {
+      this.readFile(this.props.file);      
+    }, 100);
+  }
+
+  componentDidUpdate() {
+    if (this.props.upload && this.state.status === 2)
+      this.upload();
+  }
+
+  handleCancel() {
+    this.setState({ status: -1 });
+    setTimeout(() => {
+      this.props.onCancel();
+    }, 300);
+  }
+
+  readFile(file) {
+    if (!["image/jpeg", "image/png", "image/gif"].includes(file.type)) {
+      alert('请不要上传jpg、png、gif格式以外的文件！');
+      this.handleCancel();
+      return;
+    }
+    let reader = new FileReader();
+    this.setState({ status: -2 });
+    setTimeout(() => {
+      this.setState({ status: 0 });
      reader.onload = () => {
        var image = new Image();
-        image.onload = () => setTimeout(() => this.convert(image), 1000);
+        // 被注释掉的是用来应对ios巨大图片没来得及加载的问题
+        // image.onload = () => setTimeout(() => this.convert(image), 1000);
+        image.onload = () => this.convert(image);
        image.src = reader.result;
+        this.setState({ status: 1 });
      };
-      reader.readAsDataURL(file);
-    }
+      reader.readAsDataURL(file);   
+    }, 300);
  }

  convert(img) {
@ -45,21 +74,12 @@ export default class UploadUnit extends Component {
    canvas.width = width;
    canvas.height = height;
    canvas.getContext('2d').drawImage(img, 0, 0, width, height);
-    this.toBlobPromise = new Promise(res => {
-      canvas.toBlob(blob => {
-        res(blob);
-      }, 'image/jpeg', 0.8);
-    })
-    this.converted = true;
-    this.setState({ img_base64: canvas.toDataURL('image/jpeg', 0.8) });
+    canvas.toBlob(blob => {
+      this.setState({ src: canvas.toDataURL('image/jpeg', 0.8), status: 2, file: blob, width: width / height * 200 });
+    }, 'image/jpeg', 0.8);
  }

  async upload() {
-    var el = document.getElementById('process-bubble');
-    el.style.display = '';
-    setTimeout(() => {
-      el.className = 'show';
-    }, 100);      
    var xhr = new XMLHttpRequest();
    xhr.onreadystatechange = () => {
      if (xhr.readyState === 4) {
@ -70,49 +90,101 @@ export default class UploadUnit extends Component {
            this.props.onUpload(data.data.url);
          }
          else {
-            this.setState({ status: 1 });
+            this.setState({ status: 2 });
            this.props.onUploadError(data.msg);
          }
        }
        else {
-          this.setState({ status: 1 });
+          this.setState({ status: 2 });
          this.props.onUploadError('上传失败：服务器出错');
        }
      }
    };
    xhr.onerror = () => {
-      this.setState({ status: 1 });
+      this.setState({ status: 2 });
      this.props.onUploadError('请求失败，请检查网络');
    }
+    xhr.onprogress = e => {
+      if (e.lengthComputable) {
+        var percent = Math.round(e.loaded * 100 / e.total);
+        this.setState({ progress: percent });
+      }
+    };
    xhr.open("POST", apis.uploadImage, true);
    xhr.setRequestHeader("X-Requested-With", "XMLHttpRequest");

    var fd = new FormData();
-    fd.append("image", await this.toBlobPromise, 'image.jpg');
+    fd.append("image", this.state.file, 'image.jpg');
    xhr.send(fd);
+    this.setState({ status: 3, progress: 0 });
  }

  render() {
+    const angle = this.state.progress / 100 * Math.PI * 2;
    return (
-      <div className="upload-unit">
-        {
-          this.state.status !== 0
-            ? <img src={this.state.src} alt={this.state.status === 1 ? '原图片' : '压缩后的图片'} />
+      <div className="upload-wrap">
+        <div className={this.state.status === -1 ? 'upload-unit' : 'upload-unit open'} style={{ width: this.state.status <= 1 ? '' : `${this.state.width}px` }}>
+          {this.state.status >= 2
+            ? <img src={this.state.src} alt="压缩后的图片" />
            : null
-        }
-        <div className="duo-animation duo-expanding-rect">
-          <div></div>
-          <div></div>
-        </div>
-        <div className="duo-animation duo-shrinking-rect">
-          <div></div>
-          <div></div>
-        </div>
-        <div className="rising-arrow">
-          <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg"><path d="M170.7 381.1c-23.3 23.3-23.3 61.2 0 84.5 11.7 11.7 27 17.5 42.3 17.5s30.6-5.9 42.3-17.5l196.8-196.8v631c0 33 26.8 59.8 59.8 59.8s59.8-26.8 59.8-59.8v-631l196.8 196.8c23.3 23.3 61.2 23.3 84.5 0s23.3-61.2 0-84.5L554.1 82.2c-23.3-23.3-61.2-23.3-84.5 0L170.7 381.1z" fill="#d91604"></path></svg>
-        </div>
-        <div className="checked-circle">
-          <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg"><path d="M512 512m-512 0a512 512 0 1 0 1024 0 512 512 0 1 0-1024 0Z" fill="#1AAC19" p-id="2905"></path><path d="M809.691429 392.777143L732.16 314.514286 447.634286 599.771429 292.571429 443.977143 214.308571 521.508571l155.794286 155.794286 77.531429 77.531429 362.057143-362.057143z" fill="#FFFFFF"></path></svg>
+          }
+          {this.state.status >= 0
+            ? (
+              <Fragment>
+                <div className={this.state.status === 2 ? 'upload-unit-mask hide' : 'upload-unit-mask'}>
+                  {this.state.status === 3
+                    ? (
+                      <div className="upload-unit-progress">
+                        <div className="progress-circle">
+                          <svg viewBox="0 0 100 100" version="1.1" xmlns="http://www.w3.org/2000/svg">
+                            <path d={
+                              `M 50,3 A 47,47 0 ${this.state.progress < 50 ? 0 : 1},1 ${50 + Math.sin(angle) * 47},${50 - Math.cos(angle) * 47}`
+                            } fill="transparent" stroke="#FFF" strokeWidth="6" strokeLinecap="round"></path>
+                          </svg>
+                        </div>
+                        <div className="progress-detail">
+                          上传中
+                        </div>
+                      </div>
+                    ) : null
+                  }
+                  {this.state.status <= 1
+                    ? (
+                      <div className="upload-unit-progress">
+                        <Spinner />
+                        <div className="progress-detail">
+                          {this.state.status === 0 ? '加载中' : '压缩中'}
+                        </div>
+                      </div>
+                    ) : null
+                  }
+                  {this.state.status === 4
+                    ? (
+                      <div style={{ color: '#FFF', fontSize: '16px' }}>上传成功</div>
+                    ) : null}
+                </div>
+                <div className="upload-btns">
+                  {this.state.status === 2
+                    ? (
+                      <button className="btn btn-circle btn-ok" onClick={this.upload}>
+                        <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg"><path d="M939.717 106.665l-304.049 324.529-78.769 85.071-225.28 240.246-123.668-115.003-129.182-121.305-78.769 84.283 129.969 121.305 33.083 31.508 129.969 121.305 44.111 40.96 304.049-324.529 78.769-85.071 304.049-324.529-84.283-78.769z" fill="#ffffff"></path></svg>
+                      </button>
+                    ) : null
+                  }
+                  {this.state.status === 2 || this.state.status === 4
+                    ? (
+                      <button className="btn btn-circle btn-primary">
+                        <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg"><path d="M959.488 920.32l-39.168 39.168a27.676444 27.676444 0 0 1-39.139556 0l-162.133333-162.133333a27.648 27.648 0 0 1 0-39.168l39.139556-39.139556a27.648 27.648 0 0 1 39.168 0l162.133333 162.104889c10.808889 10.837333 10.808889 28.359111 0 39.168zM169.358222 712.419556c-149.959111-149.959111-149.959111-393.102222 0-543.061334 149.959111-149.959111 393.073778-149.959111 543.061334 0 149.959111 149.959111 149.959111 393.102222 0 543.061334-149.987556 149.959111-393.102222 149.959111-543.061334 0zM631.324444 249.742222c-105.358222-105.386667-276.195556-105.386667-381.582222 0a269.824 269.824 0 0 0 0 381.610667A269.824 269.824 0 1 0 631.324444 249.742222z" fill="#ffffff"></path><path d="M959.488 920.32l-39.168 39.168a27.676444 27.676444 0 0 1-39.139556 0l-162.133333-162.133333a27.648 27.648 0 0 1 0-39.168l39.139556-39.139556a27.648 27.648 0 0 1 39.168 0l162.133333 162.104889c10.808889 10.837333 10.808889 28.359111 0 39.168zM169.358222 712.419556c-149.959111-149.959111-149.959111-393.102222 0-543.061334 149.959111-149.959111 393.073778-149.959111 543.061334 0 149.959111 149.959111 149.959111 393.102222 0 543.061334-149.987556 149.959111-393.102222 149.959111-543.061334 0zM631.324444 249.742222c-105.358222-105.386667-276.195556-105.386667-381.582222 0a269.824 269.824 0 0 0 0 381.610667A269.824 269.824 0 1 0 631.324444 249.742222z" fill="#ffffff"></path></svg>
+                      </button>
+                    ) : null
+                  }
+                  <button className="btn btn-circle btn-gray" onClick={this.handleCancel}>
+                    <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg"><path d="M597.333333 512l284.444445 284.444444c2.929778 3.328 2.929778 22.357333 0 28.444445l-56.888889 56.888889c-6.087111 2.929778-25.116444 2.929778-28.444445 0L512 597.333333 227.555556 881.777778c-3.328 2.929778-22.328889 2.929778-28.444445 0l-56.888889-56.888889c-2.929778-6.087111-2.929778-25.116444 0-28.444445l284.444445-284.444444L142.222222 227.555556c-2.929778-3.328-2.929778-22.328889 0-28.444445l56.888889-56.888889c6.115556-2.929778 25.116444-2.929778 28.444445 0l284.444444 284.444445L796.444444 142.222222c3.328-2.929778 22.357333-2.929778 28.444445 0l56.888889 56.888889c2.929778 6.115556 2.929778 25.116444 0 28.444445L597.333333 512z" fill="#4a4a4a"></path></svg>
+                  </button>
+                </div>
+              </Fragment>
+            ) : null
+          }
        </div>
      </div>
    );
--- a/src/components/UploadUnit/upload.css
+++ b/src/components/UploadUnit/upload.css
@ -0,0 +1,78 @@
+.upload-wrap {
+  width: 100%;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+}
+.upload-unit {
+  width: calc(100%);
+  height: 200px;
+  min-width: 150px;
+  border: 2px dashed blue;
+  border-radius: 8px;
+  box-sizing: border-box;
+  transition: width .3s ease-out, height .3s ease-out, border .3s ease-out;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  overflow: hidden;
+}
+.upload-unit.open {
+  width: 200px;
+  border-width: 0;
+}
+.upload-unit > img {
+  margin-bottom: -200px;
+  height: 200px;
+  animation: fade-in .3s ease-out;
+  border-radius: 8px;
+}
+
+.upload-unit-mask {
+  width: 100%;
+  height: 100%;
+  background: rgba(0, 0, 0, 0.5);
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  transition: filter .3s ease-out;
+}
+.upload-unit-mask.hide {
+  filter: opacity(0);
+}
+
+.upload-unit-progress {
+  width: 50px;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+}
+.progress-detail {
+  color: white;
+  font-size: 16px;
+  margin-top: 10px;
+}
+.progress-circle {
+  width: 50px;
+  height: 50px;
+}
+
+.upload-btns {
+  display: flex;
+  justify-content: center;
+  margin-top: -60px;
+  z-index: 1;
+}
+.upload-btns > button {
+  margin: 0 5px;
+}
+
+@keyframes fade-in {
+  from {
+    filter: opacity(0);
+  }
+  to {
+    filter: opacity(1);
+  }
+}
--- a/src/env.example.json
+++ b/src/env.example.json
@ -0,0 +1,3 @@
+{
+  "backEndBaseURL": "localhost:9444"
+}
--- a/src/helper/apis.js
+++ b/src/helper/apis.js
@ -0,0 +1,13 @@
+import { backEndBaseURL } from '../env.json';
+export const apis = {
+  uploadImage: "https://image.kieng.cn/upload.html?type=jd",
+
+  login: backEndBaseURL + "/user/login",
+  getProfile: backEndBaseURL + "/user/me",
+
+  submitMessage: backEndBaseURL + "/post/submit",
+  listEssence: backEndBaseURL + "/post/listPublished",
+
+  listAll: backEndBaseURL + "/admin/list",
+  setStatus: backEndBaseURL + "/admin/setStatus"
+};
--- a/src/helper/axios.js
+++ b/src/helper/axios.js
@ -0,0 +1,18 @@
+import axios from 'axios';
+
+export function get(url) {
+  return axios.get(url, {
+    headers: {
+      Authorization: 'Bearer ' + localStorage.getItem('jwt'),
+      "Allow-Control-Allow-Origin": "*"
+    }
+  });
+}
+export function post(url, data) {
+  return axios.post(url, data, {
+    headers: {
+      Authorization: 'Bearer ' + localStorage.getItem('jwt'),
+      "Allow-Control-Allow-Origin": "*"
+    }
+  });
+}
--- a/src/resources.json
+++ b/src/resources.json
@ -1,5 +1,5 @@
 {
  "apis": {
-    "uploadImage": "https://image.kieng.cn/upload.html?type=jd"
+    
  }
 }
--- a/src/upload/upload.css
+++ b/src/upload/upload.css
@ -28,23 +28,40 @@
 .message-box {
  width: 100%;
  height: 200px;
+  margin-top: 40px;
 }
 .message-box-textarea {
  width: 100%;
  resize: none;
  height: 100%;
  box-sizing: border-box;
+  border-radius: 8px;
+  font-size: 16px;
+  padding: 10px;
+}
+.message-box-textarea:focus {
+  outline: none;
+  border-color: #008cff;
 }

 .upload-box {
  width: 100%;
  height: 200px;
+  margin-top: 15px;
 }
 .upload-area {
  width: 100%;
  height: 100%;
  border: 2px dashed blue;
  border-radius: 8px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  box-sizing: border-box;
+  cursor: pointer;
+}
+.upload-area-text {
+  font-size: 16px;
 }

 .btn-upload {
--- a/src/upload/upload.js
+++ b/src/upload/upload.js
@ -1,19 +1,48 @@
 import { Component } from 'react';
 import Dropzone from 'react-dropzone';
+import Spinner from '../components/Spinner/Spinner';
+import UploadUnit from '../components/UploadUnit/UploadUnit';
+import { post } from 'axios';
+import { apis } from '../helper/apis';
+
 import './upload.css';

 export class UploadContainer extends Component {
  constructor(props) {
    super(props);
    this.state = {
-      files: [],
-      msg: ""
+      file: null,
+      msg: "",
+      url: "",
+      submitting: false
    };
+    this.handleChange = this.handleChange.bind(this);
+    this.handleUploadError = this.handleUploadError.bind(this);
+    this.handleSubmit = this.handleSubmit.bind(this);
  }

-  handleChange = files => {
-    console.log(files);
-    this.setState({ files });
+  handleChange(files) {
+    if (files.length > 0)
+      this.setState({ file: files[0] });
+  }
+
+  handleUploadError(msg) {
+    this.setState({ submitting: false });
+  }
+
+  handleSubmit() {
+    if ((this.state.msg === "" && this.file === null) || this.state.submitting) return;
+    this.setState({ submitting: true });
+  }
+
+  componentDidUpdate() {
+    if (this.state.submitting && (!this.state.file || this.state.url !== "")) {
+      // upload using axios
+      post(apis.submitMessage, { content: this.state.msg, image: this.state.url })
+        .then(res => {
+          this.setState({ submitting: false, msg: "", url: "" });
+        });
+    }
  }

  render() {
@ -36,26 +65,38 @@ export class UploadContainer extends Component {
              placeholder="留下您的寄语"
              value={this.state.msg}
              onChange={e => this.setState({ msg: e.target.value })}
+              disabled={this.state.submitting}
            />
          </div>
          <div className="upload-box">
-            <Dropzone
-              onDropAccepted={this.handleChange}
-              multiple={true}
-              accept="image/*"
-            >
-              {({ getRootProps, getInputProps, isDragActive }) => (
-                <div {...getRootProps()} className="upload-area">
-                  <input {...getInputProps()} />
-                  <p className="upload-area-text">拖拽</p>
-                </div>
-              )}
-            </Dropzone>
+            {this.state.file ? (
+              <UploadUnit
+                file={this.state.file}
+                onUpload={url => this.setState({ url })}
+                onUploadError={this.handleUploadError}
+                onCancel={() => this.setState({ file: null, url: "" })}
+                upload={this.state.submitting}
+              />
+            ) : (
+              <Dropzone
+                onDropAccepted={this.handleChange}
+                multiple={false}
+                accept="image/*"
+              >
+                {({ getRootProps, getInputProps, isDragActive }) => (
+                  <div {...getRootProps()} className="upload-area">
+                    <input {...getInputProps()} />
+                    <div className="upload-area-text">点击方框添加图片或者将图片拖入框内，支持jpg、png、gif，但均会被转换为jpg</div>
+                  </div>
+                )}
+              </Dropzone>
+            )}
          </div>
          <button
            className="btn btn-primary btn-upload"
-            onClick={this.handleUpload}
-          >提交</button>
+            onClick={this.handleSubmit}
+            disabled={(this.state.msg === "" && this.state.file === null) || this.state.submitting}
+          >{this.state.submitting ? (<Spinner />) : '提交'}</button>
        </div>
      </div>
    );