Flask POST消息到后台提示 400 BAD request

Question

自己的博客网站后端文章添加页（设置了一个路由，接收GET和POST请求）引入了富文本编辑器wangeditor2,此编辑器有自己的上传图片功能，于是自己设置了一个响应上传图片POST请求的路由获取图片URL，但是在上传图片POST消息到后台后一直提示400 bad request,实在不清楚是什么原因，求教！！！

前端代码

{% extends "admin/base.html" %}

{% block css %}
{{ super() }}
<link href="{{ url_for('static', filename='css/wangEditor.min.css') }}" rel="stylesheet" type="text/css">
{% endblock %}

{% block sidebar %}
<li><a href="{{ url_for('.index') }}">概况</a></li>
<li class="active"><a href="{{ url_for('.article') }}">文章</a></li>
<li><a href="{{ url_for('.category') }}">文章分类</a></li>
<li><a href="{{ url_for('.user') }}">用户</a></li>
{% endblock %}

{% block main %}
<h3>发布文章</h3>
<form method="post">
    <div class="form-group">
        <label for="article_category">文章分类</label>
        <select class="form-control" id="article_category" name="category">
            {% for category in categorys %}
            <option value={{ category.id }}>{{ category.name }}</option>
            {% endfor %}
        </select>
    </div>
    <div class="form-group">
        <label for="article_title">文章标题</label>
        <input type="text" class="form-control" id="article_title" name="title">
    </div>
    <div class="form-group">
        <label for="editor">文章内容</label>
        <textarea id="editor" name="content" class="form-control" rows="30"></textarea>
    </div>
    <button type="submit" class="btn btn-default">发布</button>
</form>
{% endblock %}

{% block script %}
{{ super() }}
<script type="text/javascript" src=" {{ url_for('static', filename='js/wangEditor.min.js') }}"></script>
<script type="text/javascript">
    var textarea = document.getElementById('editor');
    var editor = new wangEditor(textarea);
    // 生成编辑器
    editor.config.uploadImgUrl = 'http://127.0.0.1:5000/admin/ImageUpdate';
    editor.config.uploadImgFns.onload = function (resultText, xhr) {
        var originalName = editor.uploadImgOriginalName || '';
        editor.command(null, 'InsertImage', resultText);
    };
    editor.create();
</script>
{% endblock %}

前端效果：

后端代码
1.文章添加页

@admin.route('/add/article', methods=['GET', 'POST'])
@login_required
def add_article():
    categorys = Category.query.all()
    if request.method == "POST" and request.form['title'] and request.form['content'] != '':
        new_article = Article(title=request.form['title'], content=request.form['content'], abstract=request.form['content'][:137]+'...',
                              category_id=request.form['category'])
        db.session.add(new_article)
        return redirect(url_for('admin.article'))
    return render_template('admin/addarticle.html', categorys=categorys)

2.图片上传响应

@admin.route('/ImageUpdate', methods=['POST'])
def getimage():
    file = request.files[0]
    if file == None:
        result = r"error|未成功获取文件，上传失败"
        res = Response(result)
        res.headers["ContentType"] = "text/html"
        res.headers["Charset"] = "utf-8"
        return res
    else:
        filename = file.filename
        if file and '.' in filename and filename.split('.')[1] in current_app.config['ALLOWED_EXTENSIONS']:
            access_key = current_app.config['QINIU_ACCESS_KEY']
            secret_key = current_app.config['QINIU_SECRET_KEY']
            q = Auth(access_key, secret_key)
            bucket_name = 'blogimage'
            key = filename
            token = q.upload_token(bucket_name, key, 3600)
            localfile = file
            put_file(token, key, localfile)
            image_url = "http://oq39ef5bt.bkt.clouddn.com/%s" % filename
            res = Response(image_url)
            res.headers["ContentType"] = "text/html"
            res.headers["Charset"] = "utf-8"
            return res

上传图片POST响应结果

Answer 1

@admin.route('/ImageUpdate', methods=['POST'])
def getimage():
    file = request.files['wangEditorH5File']