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MQTT与TCP的区别 - 创客硬件开发 - 清泛IT社区，为创新赋能！
...的消息服务质量。提供不同等级的“服务质量”。
协议位置TCP是OSI第四层的传输层协议。MQTT是基于TCP的七层应用层协议。
协议定位TCP设计考虑的是面向连接的、可靠的、基于字节流的传输层通信协议。MQTT则是在低带宽高延...
ASP.NET Web API - PUT & DELETE Verbs Not Allowed - IIS 8
...-4.0_32bit" />
<remove name="ExtensionlessUrlHandler-ISAPI-4.0_64bit" />
<remove name="ExtensionlessUrlHandler-Integrated-4.0" />
<add name="ExtensionlessUrlHandler-ISAPI-4.0_32bit" path="*." verb="GET,HEAD,POST,DEBUG,PUT,DELETE,PATCH,OPTIONS" modules="IsapiModule...
convert UIImage to NSData
... UIImage *snapshot = self.myImageView.image;
[self encodeImageToBase64String:snapshot];
}
call this method for image convert in base 64
-(NSString *)encodeImageToBase64String:(UIImage *)image
{
return [UIImagePNGRepresentation(image) base64EncodedStringWithOptions:NSDat...
How can mixed data types (int, float, char, etc) be stored in an array?
...marBarmar
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23
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static linking only some libraries
...x00007f9a5ad99000)
libc.so.6 => /lib/libc.so.6 (0x00007f9a5aa46000)
/lib64/ld-linux-x86-64.so.2 (0x00007f9a5b53f000)
As you can see in the example, libX11 is not in the list of dynamically-linked libraries, as it was linked statically.
Beware: An .so file is always linked dynamically, even whe...
Could not load file or assembly … An attempt was made to load a program with an incorrect format (Sy
...
664
I am pretty sure you're having a 32-bit / 64-bit conflict. It sounds like your main project mig...
How to hash some string with sha256 in Java?
...ry data, and if you want to represent that in a string, you should use base64 or hex... don't try to use the String(byte[], String) constructor.
e.g.
MessageDigest digest = MessageDigest.getInstance("SHA-256");
byte[] hash = digest.digest(text.getBytes(StandardCharsets.UTF_8));
...
Simple insecure two-way data “obfuscation”?
...honest people honest, but something a little stronger than ROT13 or Base64 .
17 Answers
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Install a Windows service using a Windows command prompt?
...
If it is the x64 compiled service, use "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\installutil.exe".
– nme
Feb 23 '16 at 10:10
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From inside of a Docker container, how do I connect to the localhost of the machine?
...alid_lft forever preferred_lft forever
inet6 fe80::5484:7aff:fefe:9799/64 scope link
valid_lft forever preferred_lft forever
So here my docker host has the IP address 172.17.42.1 on the docker0 network interface.
Now start a new container and get a shell on it: docker run --rm -it ubun...