http中的payload怎么理解？
4 个回答
payload就是协议报文中的有效载荷所占报文的百分比，用报文中去除协议的长度/报文总长度，协议设计的时候需要考虑到有效载荷所占的比重，避免出现payload很小的情况，比如TCP在设计的时候，就考虑在发送报文过程中，增加了接收报文的确认，而不是单独发送一个确认，因为单独发送一个报文的payload太低。
1.
In computing and telecommunications, the payload is the part of transmitted data that is the actual intended message. The payload excludes any headers or metadata sent solely to facilitate payload delivery.
2.
In computer security, the payload is the part of malware such as worms or viruses which performs the malicious action; deleting data, sending spam or encrypting data. In addition to the payload, such malware also typically has overhead code aimed at simply spreading itself, or avoiding detection.
3.
In the computer networking, data to be transmitted is the payload, but is almost always encapsulated in some type of a "frame" composed of framing bits and a frame check sequence.Examples are Ethernet frames, Point-to-Point Protocol (PPP) frames, Fibre Channel frames, and V.42 modem frames.
4.
In computer programming, the most common usage of the term is in the context of message protocols, to differentiate the protocol overhead from the actual data. For example, a JSONweb serviceresponse might be:
{
"data":{
"message":"Hello, world!"
}
}
The string "Hello, world!" is the payload, while the rest is protocol overhead.
On the Internet, a payload is either:
1) The essential data that is being carried within a packet or other transmission unit. The payload does not include the "overhead" data required to get the packet to its destination. Note that what constitutes the payload may depend on the point-of-view. To a communications layer that needs some of the overhead data to do its job, the payload is sometimes considered to include the part of the overhead data that this layer handles. However, in more general usage, the payload is the bits that get delivered to the end user at the destination.
2) The eventual effect of a software virus that has been delivered to a user's computer.
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