blocks|key|196632|text|这就是我要做的，也应该是这样的|type|unstyled|depth|inlineStyleRanges|entityRanges|data|196633|@app.route('/api/add_message/<uuid>',+methods=['GET',+'POST'])
def+add_message(uuid):
++++content+=+request.get_json(silent=True)
++++#+print(content)+#+Do+your+processing
++++return+uuid|code-block|syntax|javascript|196634|在设置了silent=True的情况下，get_json函数在尝试检索json主体时将静默失败。默认情况下，它设置为False。如果您总是期望json主体(不是可选的)，那么将其保留为silent=False。|offset|length|style|CODE|196635|设置force=True将忽略flask为您执行的request.headers.get('Content-Type')+==+'application/json'检查。默认情况下，这也设置为False。|196636|参见flask+documentation。|196637|我强烈建议保留force=False，并让客户端发送Content-Type标头以使其更明确。|196638|希望这能有所帮助！|196639|entityMap|0|LINK|mutability|MUTABLE|url|http://flask.pocoo.org/docs/0.10/api/^0|0|0|4|B|K|8|1M|5|2K|C|0|2|A|P|1L|2O|5|0|2|J|0|0|7|B|Q|C|0|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|13|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|14|8|@$I|15|J|16|K|L]|$I|17|J|18|K|L]|$I|19|J|1A|K|L]|$I|1B|J|1C|K|L]]|9|@]|A|$]]|$1|M|3|N|5|6|7|1D|8|@$I|1E|J|1F|K|L]|$I|1G|J|1H|K|L]|$I|1I|J|1J|K|L]]|9|@]|A|$]]|$1|O|3|P|5|6|7|1K|8|@]|9|@$I|1L|J|1M|1|1N]]|A|$]]|$1|Q|3|R|5|6|7|1O|8|@$I|1P|J|1Q|K|L]|$I|1R|J|1S|K|L]]|9|@]|A|$]]|$1|S|3|T|5|6|7|1T|8|@]|9|@]|A|$]]|$1|U|3|-4|5|6|7|1U|8|@]|9|@]|A|$]]]|V|$W|$5|X|Y|Z|A|$10|11]]]]

This is the way I would do it and it should be 

<pre><code>@app.route('/api/add_message/&lt;uuid&gt;', methods=['GET', 'POST'])
def add_message(uuid):
 content = request.get_json(silent=True)
 # print(content) # Do your processing
 return uuid
</code></pre>

With <code>silent=True</code> set, the <code>get_json</code> function will fail silently when trying to retrieve the json body. By default this is set to <code>False</code>. If you are always expecting a json body (not optionally), leave it as <code>silent=False</code>.

Setting <code>force=True</code> will ignore the 
<code>request.headers.get('Content-Type') == 'application/json'</code> check that flask does for you. By default this is also set to <code>False</code>. 

See <a href="http://flask.pocoo.org/docs/0.10/api/" rel="noreferrer">flask documentation</a>.

I would strongly recommend leaving <code>force=False</code> and make the client send the <code>Content-Type</code> header to make it more explicit.

Hope this helps!

blocks|key|196663|text|作为参考，下面是如何从Python客户端发送json的完整代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|196664|import+requests
res+=+requests.post('http://localhost:5000/api/add_message/1234',+json={"mytext":"lalala"})
if+res.ok:
++++print(res.json())|code-block|syntax|javascript|196665|如下所述，"json=“输入将自动设置内容类型：How+to+POST+JSON+data+with+Python+Requests?|offset|length|196666|上面的客户端将使用以下服务器端代码：|196667|from+flask+import+Flask,+request,+jsonify
app+=+Flask(__name__)

@app.route('/api/add_message/<uuid>',+methods=['GET',+'POST'])
def+add_message(uuid):
++++content+=+request.json
++++print(content['mytext'])
++++return+jsonify({"uuid":uuid})

if+__name__+==+'__main__':
++++app.run(host=+'0.0.0.0',debug=True)|196668|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/9733638/post-json-using-python-requests^0|0|0|O|17|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Y|8|@]|9|@$I|Z|J|10|1|11]]|A|$]]|$1|K|3|L|5|6|7|12|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|13|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|14|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V]]]]

For reference, here's complete code for how to send json from a Python client:
<pre><code>import requests
res = requests.post('http://localhost:5000/api/add_message/1234', json={&quot;mytext&quot;:&quot;lalala&quot;})
if res.ok:
 print(res.json())
</code></pre>
The &quot;json=&quot; input will automatically set the content-type, as discussed here: <a href="https://stackoverflow.com/questions/9733638/post-json-using-python-requests">How to POST JSON data with Python Requests?</a>
And the above client will work with this server-side code:
<pre><code>from flask import Flask, request, jsonify
app = Flask(__name__)

@app.route('/api/add_message/&lt;uuid&gt;', methods=['GET', 'POST'])
def add_message(uuid):
 content = request.json
 print(content['mytext'])
 return jsonify({&quot;uuid&quot;:uuid})

if __name__ == '__main__':
 app.run(host= '0.0.0.0',debug=True)
</code></pre>

blocks|key|196686|text|假设您已经使用application/json内容类型发布了有效的JSON，request.json将拥有解析后的JSON数据。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|196687|from+flask+import+Flask,+request,+jsonify

app+=+Flask(__name__)


@app.route('/echo',+methods=['POST'])
def+hello():
+++return+jsonify(request.json)|code-block|syntax|javascript|196688|entityMap^0|7|G|12|C|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|S|8|@]|D|@]|E|$]]]|L|$]]

Assuming you've posted valid JSON with the <code>application/json</code> content type, <code>request.json</code> will have the parsed JSON data.

<pre><code>from flask import Flask, request, jsonify

app = Flask(__name__)


@app.route('/echo', methods=['POST'])
def hello():
 return jsonify(request.json)
</code></pre>

blocks|key|196745|text|给出另一种方法。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|196746|from+flask+import+Flask,+jsonify,+request
app+=+Flask(__name__)

@app.route('/service',+methods=['POST'])
def+service():
++++data+=+json.loads(request.data)
++++text+=+data.get("text",None)
++++if+text+is+None:
++++++++return+jsonify({"message":"text+not+found"})
++++else:
++++++++return+jsonify(data)

if+__name__+==+'__main__':
++++app.run(host=+'0.0.0.0',debug=True)|code-block|syntax|javascript|196747|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

To give another approach.

<pre><code>from flask import Flask, jsonify, request
app = Flask(__name__)

@app.route('/service', methods=['POST'])
def service():
 data = json.loads(request.data)
 text = data.get("text",None)
 if text is None:
 return jsonify({"message":"text not found"})
 else:
 return jsonify(data)

if __name__ == '__main__':
 app.run(host= '0.0.0.0',debug=True)
</code></pre>

blocks|key|4702740|text|假设您已经发布了有效的JSON，|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4702741|@app.route('/api/add_message/<uuid>',+methods=['GET',+'POST'])
def+add_message(uuid):
++++content+=+request.json
++++print+content['uuid']
++++#+Return+data+as+JSON
++++return+jsonify(content)|code-block|syntax|javascript|4702742|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Assuming that you have posted valid JSON,

<pre><code>@app.route('/api/add_message/&lt;uuid&gt;', methods=['GET', 'POST'])
def add_message(uuid):
 content = request.json
 print content['uuid']
 # Return data as JSON
 return jsonify(content)
</code></pre>

blocks|key|4702764|text|对于那些因为ajax调用而遇到问题的人，这里有一个完整的示例：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4702765|Ajax调用:这里的关键是先使用dict，然后使用JSON.stringify|offset|length|style|CODE|4702766|++++var+dict+=+{username+:+"username"+,+password:"password"};

++++$.ajax({
++++++++type:+"POST",+
++++++++url:+"http://127.0.0.1:5000/",+//localhost+Flask
++++++++data+:+JSON.stringify(dict),
++++++++contentType:+"application/json",
++++});|code-block|syntax|javascript|4702767|在服务器端：|4702768|from+flask+import+Flask
from+flask+import+request
import+json

app+=+Flask(__name__)

@app.route("/",++methods+=+['POST'])
def+hello():
++++print(request.get_json())
++++return+json.dumps({'success':True}),+200,+{'ContentType':'application/json'}+

if+__name__+==+"__main__":
++++app.run()|4702769|entityMap^0|0|G|4|P|E|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@$D|U|E|V|F|G]|$D|W|E|X|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|Y|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|Z|8|@]|9|@]|A|$]]|$1|O|3|P|5|J|7|10|8|@]|9|@]|A|$K|L]]|$1|Q|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|R|$]]

For all those whose issue was from the ajax call, here is a full example :

Ajax call : the key here is to use a <code>dict</code> and then <code>JSON.stringify</code>

<pre><code> var dict = {username : "username" , password:"password"};

 $.ajax({
 type: "POST", 
 url: "http://127.0.0.1:5000/", //localhost Flask
 data : JSON.stringify(dict),
 contentType: "application/json",
 });
</code></pre>

And on server side : 

<pre><code>from flask import Flask
from flask import request
import json

app = Flask(__name__)

@app.route("/", methods = ['POST'])
def hello():
 print(request.get_json())
 return json.dumps({'success':True}), 200, {'ContentType':'application/json'} 

if __name__ == "__main__":
 app.run()
</code></pre>

blocks|key|196828|text|尝试使用force参数...|type|unstyled|depth|inlineStyleRanges|entityRanges|data|196829|request.get_json(force+=+True)|offset|length|style|CODE|196830|entityMap^0|0|0|U|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@$D|L|E|M|F|G]]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

Try to use force parameter...

<code>request.get_json(force = True)</code>

blocks|key|196868|text|您可能会注意到，只有在请求的头部中添加了Content-type:+application/json时，request.json或request.get_json()才会起作用。如果您无法更改客户端请求配置，则可以像下面这样获取body的json格式：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|196869|data+=+json.loads(request.data)|code-block|syntax|javascript|196870|entityMap^0|K|U|1G|C|1T|I|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]|$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|U|8|@]|D|@]|E|$]]]|L|$]]

You may note that <code>request.json</code> or <code>request.get_json()</code> works only when the <code>Content-type: application/json</code> has been added in the header of the request. If you are unable to change the client request configuration, so you can get the body as json like this:
<pre><code>data = json.loads(request.data)
</code></pre>

blocks|key|196946|text|可以使用以下代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|196947|@app.route('/api/add_message/<uuid>',+methods=['GET',+'POST'])
def+add_message(uuid):
++content+=+request.json['text']
++print+content
++return+uuid|code-block|syntax|javascript|196948|下面是我获取json数据的截图：|196949|​|196950|📷|atomic|offset|length|196951|196952|您可以看到，返回的是字典类型的数据。|196953|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/684f6f5bc25d40543ce3201a9ce3da04.jpeg|imageAlt^0|0|0|0|0|0|1|0|0|0|0^^$0|@$1|2|3|4|5|6|7|11|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|12|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|13|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|14|8|@]|9|@]|A|$]]|$1|K|3|L|5|M|7|15|8|@]|9|@$N|16|O|17|1|18]]|A|$]]|$1|P|3|J|5|6|7|19|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|1A|8|@]|9|@]|A|$]]|$1|S|3|-4|5|6|7|1B|8|@]|9|@]|A|$]]]|T|$U|$5|V|W|X|A|$Y|Z|10|-4]]]]

The following codes can be used：
<pre><code>@app.route('/api/add_message/&lt;uuid&gt;', methods=['GET', 'POST'])
def add_message(uuid):
 content = request.json['text']
 print content
 return uuid
</code></pre>
Here is a screenshot of me getting the json data:
<a href="https://i.stack.imgur.com/2uFqM.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/2uFqM.jpg" alt="enter image description here" /></a>
You can see that what is returned is a dictionary type of data.

blocks|key|4702930|text|尝试在get_json()方法中将force属性设置为True以解决此问题。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4702931|request.get_json(force+=+True)|code-block|syntax|javascript|4702932|entityMap^0|3|A|H|5|R|4|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]|$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|U|8|@]|D|@]|E|$]]]|L|$]]

Try to set <code>force</code> attribute as <code>True</code> in <code>get_json()</code> method to resolve this issue.
<pre><code>request.get_json(force = True)
</code></pre>

blocks|key|4702950|text|即使我在这里遇到的所有答案都是正确的。我认为有一些事情应该作为更好的实践来做。以下是我将如何编写它。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4702951|from+flask+import+app,+request,+Flask,+jsonify


@app.route('/api/add_message/<uuid>',+methods=['GET',+'POST'])
def+add_message(uuid):
++++
++++#+Check+if+the+request+method+is+POST
++++if+request.method+==+'POST':
++++++++#+content+will+return+eather+parse+data+as+JSON
++++++++#+Or+None+incase+there+is+no+data
++++++++content+=+request.get_json()
++++++++print(content)
++++++++#+The+content+could+be+displayed+in+html+page+if+serialized+as+json
++++++++return+jsonify(content)+#+Return+null+if+there+is+content

++++#+if+it+is+only+get+request+then+just+return+uuid
++++return+uuid|code-block|syntax|javascript|4702952|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Even though all the answers I encounter here are right. There is something that I think it should be done as better practice. Here is how I would write it.
<pre><code>from flask import app, request, Flask, jsonify


@app.route('/api/add_message/&lt;uuid&gt;', methods=['GET', 'POST'])
def add_message(uuid):
 
 # Check if the request method is POST
 if request.method == 'POST':
 # content will return eather parse data as JSON
 # Or None incase there is no data
 content = request.get_json()
 print(content)
 # The content could be displayed in html page if serialized as json
 return jsonify(content) # Return null if there is content

 # if it is only get request then just return uuid
 return uuid
</code></pre>

I'm trying to build a simple API using Flask, in which I now want to read some POSTed JSON. I do the POST with the Postman Chrome extension, and the JSON I POST is simply <code>{"text":"lalala"}</code>. I try to read the JSON using the following method:

<pre><code>@app.route('/api/add_message/&lt;uuid&gt;', methods=['GET', 'POST'])
def add_message(uuid):
 content = request.json
 print content
 return uuid
</code></pre>

On the browser it correctly returns the UUID I put in the GET, but on the console, it just prints out <code>None</code> (where I expect it to print out the <code>{"text":"lalala"}</code>. Does anybody know how I can get the posted JSON from within the Flask method?

How to get POSTed JSON in Flask?

服务器

Python

JSON

我正在尝试使用Flask构建一个简单的应用程序接口，现在我想在其中阅读一些POSTed JSON。我使用Postman Chrome扩展发布，JSON I发布的只是{"text":"lalala"}。我尝试使用以下方法读取JSON：@app.route('/api/add_message/<uuid>', method...

问如何在Flask中获取POSTed JSON？
EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何在Flask中获取POSTed JSON？EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何在Flask中获取POSTed JSON？
EN