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App Inventor 2 上传文件到服务器的方案全总结 - App Inventor 2 中文网 - ...
...复制代码文件成功上传并写入：
python服务端参考：
from flask_restful import Api, Resource
from flask import Flask, request
app = Flask(__name__)
api = Api(app)
# 这边的类名是自己定义的
class receive_pic(Resource):
def put(self):
...
App Inventor 2 实现上传文件到服务器全方案总结 · App Inventor 2 中文网
...如下：
php服务端代码参考：
python服务端参考：
from flask_restful import Api, Resource
from flask import Flask, request
app = Flask(__name__)
api = Api(app)
# 这边的类名是自己定义的
class receive_pic(Resource):
def put(self):
#接收二进制流保...
What is the difference between Raising Exceptions vs Throwing Exceptions in Ruby?
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Curious to know... Reading this from an iPad, so can't test them in 1.9, but some of those gotchas are no longer valid in recent ruby versions, right?
– Denis de Bernardy
Jun 22 '11 at 18:59
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Creating a copy of an object in C# [duplicate]
Please have a look at the code below (excerpt from a C# book):
4 Answers
4
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What is the right way to check for a null string in Objective-C?
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Coming here from Flutter, and looking for the reason why a Map item's value - which is null in Dart - doesn't correspond to nil or NULL in Objective C. The reason was that it is actually NUNull null, not the NULL null. Thank You @PeterNL...
Reformat XML in Visual Studio 2010
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... and if it's from a file, the file extension should be relevant to the format... like .xml or .html
– BeardinaSuit
Nov 15 '11 at 18:25
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Pip install Matplotlib error with virtualenv
...ng freetype did not solve anything, I investigated further.
The solution:
From github issue:
This bug only occurs if pkg-config is not installed;
a simple
sudo apt-get install pkg-config
will shore up the include paths for now.
After this installation proceeds smoothly.
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Multiple commands on a single line in a Windows batch file
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Use:
echo %time% & dir & echo %time%
This is, from memory, equivalent to the semi-colon separator in bash and other UNIXy shells.
There's also && (or ||) which only executes the second command if the first succeeded (or failed), but the single ampersand & i...
Check if PHP session has already started
I have a PHP file that is sometimes called from a page that has started a session and sometimes from a page that doesn't have session started. Therefore when I have session_start() on this script I sometimes get the error message for "session already started". For that I've put these lines:
...
How to retrieve a module's path?
... simple, you just need to know the directory you want to get notifications from.
19 Answers
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