Python Flask-json和html 404错误 [英] Python Flask - Both json and html 404 error

问题描述

我正在制作一个小的Web界面，该界面在家里的树莓派上运行.它托管了一些REST api和一些网页.

I'm making a small web interface running on a raspberry pi at home. It hosts a little REST api as well as some web pages.

我正在使用Flask，并为索引设置了路由'/'，并为REST api提供了一些路由'/api/v1.0/tasks'.

I'm using Flask, and have a route '/' for the index, and some routes for the REST api '/api/v1.0/tasks'.

@app.route('/') 
def index():
    return render_template('index.html')

@app.route('/gnodes/api/v1.0/tasks', methods=['GET'])
def get_tasks():
    return jsonify({'tasks': tasks})

@app.route('/gnodes/api/v1.0/tasks/<int:task_id>', methods=['GET'])
def get_task(task_id):
    task = [task for task in tasks if task['id'] == task_id]
    if not task:
        abort(404)
    return jsonify({'task': task[0]})

但是， abort(404)返回一个html错误页面，这对于普通页面来说很好，但是我想在请求不存在的任务时返回一个json.

However, abort(404) returns a html error page, which is fine for normal pages, but I wanted to return a json when a non-existing task is requested.

所以我已经改写了错误处理程序:

So I've overridden the errorhandler:

@app.errorhandler(404)
def not_found(error):
    return make_response(jsonify({'error': 'Not found'}), 404)

但是，现在所有错误都返回json，而不仅是api错误.

However, now all error return the json, rather than only the api error.

所以我的问题是，如何对API发出失败的请求会返回json错误，而其他错误则是默认的html错误页面?

So my question, how can I make failed requests to the API return the json error, but other errors the default html error page?

推荐答案

我发现解决此问题的最佳方法是使用蓝图.

The best way I found to fix this is using blueprints.

我将自己的API放入了自己的蓝图中，在那里我可以单独为该蓝图定义一个错误处理程序.

I put my API in it's own blueprint, and there I can define an errorhandler for that blueprint alone.

唯一的问题是，当api中不存在页面时，将使用默认的错误处理程序，而不是我为api蓝图定义的页面.对此也有一些解决方法，但这显然是Flask的局限性，没有大碍之处.

The only problem is that when there are non-existing pages in the api the default errorhandler is used, rather than the one I defined for the api-blueprint. There are some workaround for that too, but this is a limitation of Flask aparently, no biggy.

这篇关于Python Flask-json和html 404错误的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！