Get Data JSON in Flask

2024/11/15 6:38:50

Even following many example here & there, i can't get my API work in POST Method. Here the code about it :

from flask import Flask, jsonify, request@app.route('/api/v1/lists', methods=['POST'])
def add_entry():print("p0")content = request.get_json()appname = content.get('title')print(content)print(appname)

When i query with curl (i'm running it on Windows):

curl.exe -i -H "Content-Type: application/json" -X POST -d '{"title":"titi"}' http://localhost:5000/api/v1/lists

curl.exe -i -H "Content-Type: application/json" -X POST -d "{"""title""":"""Read a book"""}" http://localhost:5000/api/v1/lists

I have always a 400 error in return:

HTTP/1.0 400 BAD REQUEST Content-Type: text/html Content-Length: 192 Server: Werkzeug/0.12.1 Python/3.6.0 Date: Tue, 04 Apr 2017 21:55:29 GMT400 Bad Request Bad Request The browser (or proxy) sent a request that this server could not understand.

I dont see where the error is.

Thanks for your help.

Answer

Even with the "working" code, in case of your if-block failure (when value1 and value2 is None) will cause the same error, since you are not handling the else part of the if-block. The corrected should be:

@app.route('/api/v1/list', methods=['POST'])
def add_entry():print("p0")request_json     = request.get_json()value1           = request_json.get('First_Name')value2           = request_json.get('Last_Name')response_content = Noneif value1 is not None and value2 is not None:print("p3")cursor.execute("INSERT INTO person (first_name,last_name) VALUES (%s,%s)", (value1, value2))response_content = conn.commit()return jsonify(response_content)

Of course you may want something better than None as the response.

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